Index: head/sys/amd64/amd64/machdep.c =================================================================== --- head/sys/amd64/amd64/machdep.c (revision 324784) +++ head/sys/amd64/amd64/machdep.c (revision 324785) @@ -1,2572 +1,2569 @@ /*- * Copyright (c) 2003 Peter Wemm. * Copyright (c) 1992 Terrence R. Lambert. * Copyright (c) 1982, 1987, 1990 The Regents of the University of California. * All rights reserved. * * This code is derived from software contributed to Berkeley by * William Jolitz. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * 3. All advertising materials mentioning features or use of this software * must display the following acknowledgement: * This product includes software developed by the University of * California, Berkeley and its contributors. * 4. Neither the name of the University nor the names of its contributors * may be used to endorse or promote products derived from this software * without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * SUCH DAMAGE. * * from: @(#)machdep.c 7.4 (Berkeley) 6/3/91 */ #include __FBSDID("$FreeBSD$"); #include "opt_atpic.h" #include "opt_compat.h" #include "opt_cpu.h" #include "opt_ddb.h" #include "opt_inet.h" #include "opt_isa.h" #include "opt_kstack_pages.h" #include "opt_maxmem.h" #include "opt_mp_watchdog.h" #include "opt_platform.h" #include "opt_sched.h" #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #ifdef SMP #include #endif #include #include #include #include #include #include #include #include #include #include #include #include #include #include #ifdef DDB #ifndef KDB #error KDB must be enabled in order for DDB to work! #endif #include #include #endif #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #ifdef SMP #include #endif #ifdef FDT #include #endif #ifdef DEV_ATPIC #include #else #include #endif #include #include #include /* Sanity check for __curthread() */ CTASSERT(offsetof(struct pcpu, pc_curthread) == 0); extern u_int64_t hammer_time(u_int64_t, u_int64_t); #define CS_SECURE(cs) (ISPL(cs) == SEL_UPL) #define EFL_SECURE(ef, oef) ((((ef) ^ (oef)) & ~PSL_USERCHANGE) == 0) static void cpu_startup(void *); static void get_fpcontext(struct thread *td, mcontext_t *mcp, char *xfpusave, size_t xfpusave_len); static int set_fpcontext(struct thread *td, mcontext_t *mcp, char *xfpustate, size_t xfpustate_len); SYSINIT(cpu, SI_SUB_CPU, SI_ORDER_FIRST, cpu_startup, NULL); /* Preload data parse function */ static caddr_t native_parse_preload_data(u_int64_t); /* Native function to fetch and parse the e820 map */ static void native_parse_memmap(caddr_t, vm_paddr_t *, int *); /* Default init_ops implementation. */ struct init_ops init_ops = { .parse_preload_data = native_parse_preload_data, .early_clock_source_init = i8254_init, .early_delay = i8254_delay, .parse_memmap = native_parse_memmap, #ifdef SMP .mp_bootaddress = mp_bootaddress, .start_all_aps = native_start_all_aps, #endif .msi_init = msi_init, }; /* * The file "conf/ldscript.amd64" defines the symbol "kernphys". Its value is * the physical address at which the kernel is loaded. */ extern char kernphys[]; struct msgbuf *msgbufp; /* * Physical address of the EFI System Table. Stashed from the metadata hints * passed into the kernel and used by the EFI code to call runtime services. */ vm_paddr_t efi_systbl_phys; /* Intel ICH registers */ #define ICH_PMBASE 0x400 #define ICH_SMI_EN ICH_PMBASE + 0x30 int _udatasel, _ucodesel, _ucode32sel, _ufssel, _ugssel; int cold = 1; long Maxmem = 0; long realmem = 0; /* * The number of PHYSMAP entries must be one less than the number of * PHYSSEG entries because the PHYSMAP entry that spans the largest * physical address that is accessible by ISA DMA is split into two * PHYSSEG entries. */ #define PHYSMAP_SIZE (2 * (VM_PHYSSEG_MAX - 1)) vm_paddr_t phys_avail[PHYSMAP_SIZE + 2]; vm_paddr_t dump_avail[PHYSMAP_SIZE + 2]; /* must be 2 less so 0 0 can signal end of chunks */ #define PHYS_AVAIL_ARRAY_END (nitems(phys_avail) - 2) #define DUMP_AVAIL_ARRAY_END (nitems(dump_avail) - 2) struct kva_md_info kmi; static struct trapframe proc0_tf; struct region_descriptor r_gdt, r_idt; struct pcpu __pcpu[MAXCPU]; struct mtx icu_lock; struct mem_range_softc mem_range_softc; struct mtx dt_lock; /* lock for GDT and LDT */ void (*vmm_resume_p)(void); static void cpu_startup(dummy) void *dummy; { uintmax_t memsize; char *sysenv; /* * On MacBooks, we need to disallow the legacy USB circuit to * generate an SMI# because this can cause several problems, * namely: incorrect CPU frequency detection and failure to * start the APs. * We do this by disabling a bit in the SMI_EN (SMI Control and * Enable register) of the Intel ICH LPC Interface Bridge. */ sysenv = kern_getenv("smbios.system.product"); if (sysenv != NULL) { if (strncmp(sysenv, "MacBook1,1", 10) == 0 || strncmp(sysenv, "MacBook3,1", 10) == 0 || strncmp(sysenv, "MacBook4,1", 10) == 0 || strncmp(sysenv, "MacBookPro1,1", 13) == 0 || strncmp(sysenv, "MacBookPro1,2", 13) == 0 || strncmp(sysenv, "MacBookPro3,1", 13) == 0 || strncmp(sysenv, "MacBookPro4,1", 13) == 0 || strncmp(sysenv, "Macmini1,1", 10) == 0) { if (bootverbose) printf("Disabling LEGACY_USB_EN bit on " "Intel ICH.\n"); outl(ICH_SMI_EN, inl(ICH_SMI_EN) & ~0x8); } freeenv(sysenv); } /* * Good {morning,afternoon,evening,night}. */ startrtclock(); printcpuinfo(); /* * Display physical memory if SMBIOS reports reasonable amount. */ memsize = 0; sysenv = kern_getenv("smbios.memory.enabled"); if (sysenv != NULL) { memsize = (uintmax_t)strtoul(sysenv, (char **)NULL, 10) << 10; freeenv(sysenv); } if (memsize < ptoa((uintmax_t)vm_cnt.v_free_count)) memsize = ptoa((uintmax_t)Maxmem); printf("real memory = %ju (%ju MB)\n", memsize, memsize >> 20); realmem = atop(memsize); /* * Display any holes after the first chunk of extended memory. */ if (bootverbose) { int indx; printf("Physical memory chunk(s):\n"); for (indx = 0; phys_avail[indx + 1] != 0; indx += 2) { vm_paddr_t size; size = phys_avail[indx + 1] - phys_avail[indx]; printf( "0x%016jx - 0x%016jx, %ju bytes (%ju pages)\n", (uintmax_t)phys_avail[indx], (uintmax_t)phys_avail[indx + 1] - 1, (uintmax_t)size, (uintmax_t)size / PAGE_SIZE); } } vm_ksubmap_init(&kmi); printf("avail memory = %ju (%ju MB)\n", ptoa((uintmax_t)vm_cnt.v_free_count), ptoa((uintmax_t)vm_cnt.v_free_count) / 1048576); /* * Set up buffers, so they can be used to read disk labels. */ bufinit(); vm_pager_bufferinit(); cpu_setregs(); } /* * Send an interrupt to process. * * Stack is set up to allow sigcode stored * at top to call routine, followed by call * to sigreturn routine below. After sigreturn * resets the signal mask, the stack, and the * frame pointer, it returns to the user * specified pc, psl. */ void sendsig(sig_t catcher, ksiginfo_t *ksi, sigset_t *mask) { struct sigframe sf, *sfp; struct pcb *pcb; struct proc *p; struct thread *td; struct sigacts *psp; char *sp; struct trapframe *regs; char *xfpusave; size_t xfpusave_len; int sig; int oonstack; td = curthread; pcb = td->td_pcb; p = td->td_proc; PROC_LOCK_ASSERT(p, MA_OWNED); sig = ksi->ksi_signo; psp = p->p_sigacts; mtx_assert(&psp->ps_mtx, MA_OWNED); regs = td->td_frame; oonstack = sigonstack(regs->tf_rsp); if (cpu_max_ext_state_size > sizeof(struct savefpu) && use_xsave) { xfpusave_len = cpu_max_ext_state_size - sizeof(struct savefpu); xfpusave = __builtin_alloca(xfpusave_len); } else { xfpusave_len = 0; xfpusave = NULL; } /* Save user context. */ bzero(&sf, sizeof(sf)); sf.sf_uc.uc_sigmask = *mask; sf.sf_uc.uc_stack = td->td_sigstk; sf.sf_uc.uc_stack.ss_flags = (td->td_pflags & TDP_ALTSTACK) ? ((oonstack) ? SS_ONSTACK : 0) : SS_DISABLE; sf.sf_uc.uc_mcontext.mc_onstack = (oonstack) ? 1 : 0; bcopy(regs, &sf.sf_uc.uc_mcontext.mc_rdi, sizeof(*regs)); sf.sf_uc.uc_mcontext.mc_len = sizeof(sf.sf_uc.uc_mcontext); /* magic */ get_fpcontext(td, &sf.sf_uc.uc_mcontext, xfpusave, xfpusave_len); fpstate_drop(td); update_pcb_bases(pcb); sf.sf_uc.uc_mcontext.mc_fsbase = pcb->pcb_fsbase; sf.sf_uc.uc_mcontext.mc_gsbase = pcb->pcb_gsbase; bzero(sf.sf_uc.uc_mcontext.mc_spare, sizeof(sf.sf_uc.uc_mcontext.mc_spare)); bzero(sf.sf_uc.__spare__, sizeof(sf.sf_uc.__spare__)); /* Allocate space for the signal handler context. */ if ((td->td_pflags & TDP_ALTSTACK) != 0 && !oonstack && SIGISMEMBER(psp->ps_sigonstack, sig)) { sp = (char *)td->td_sigstk.ss_sp + td->td_sigstk.ss_size; #if defined(COMPAT_43) td->td_sigstk.ss_flags |= SS_ONSTACK; #endif } else sp = (char *)regs->tf_rsp - 128; if (xfpusave != NULL) { sp -= xfpusave_len; sp = (char *)((unsigned long)sp & ~0x3Ful); sf.sf_uc.uc_mcontext.mc_xfpustate = (register_t)sp; } sp -= sizeof(struct sigframe); /* Align to 16 bytes. */ sfp = (struct sigframe *)((unsigned long)sp & ~0xFul); /* Build the argument list for the signal handler. */ regs->tf_rdi = sig; /* arg 1 in %rdi */ regs->tf_rdx = (register_t)&sfp->sf_uc; /* arg 3 in %rdx */ bzero(&sf.sf_si, sizeof(sf.sf_si)); if (SIGISMEMBER(psp->ps_siginfo, sig)) { /* Signal handler installed with SA_SIGINFO. */ regs->tf_rsi = (register_t)&sfp->sf_si; /* arg 2 in %rsi */ sf.sf_ahu.sf_action = (__siginfohandler_t *)catcher; /* Fill in POSIX parts */ sf.sf_si = ksi->ksi_info; sf.sf_si.si_signo = sig; /* maybe a translated signal */ regs->tf_rcx = (register_t)ksi->ksi_addr; /* arg 4 in %rcx */ } else { /* Old FreeBSD-style arguments. */ regs->tf_rsi = ksi->ksi_code; /* arg 2 in %rsi */ regs->tf_rcx = (register_t)ksi->ksi_addr; /* arg 4 in %rcx */ sf.sf_ahu.sf_handler = catcher; } mtx_unlock(&psp->ps_mtx); PROC_UNLOCK(p); /* * Copy the sigframe out to the user's stack. */ if (copyout(&sf, sfp, sizeof(*sfp)) != 0 || (xfpusave != NULL && copyout(xfpusave, (void *)sf.sf_uc.uc_mcontext.mc_xfpustate, xfpusave_len) != 0)) { #ifdef DEBUG printf("process %ld has trashed its stack\n", (long)p->p_pid); #endif PROC_LOCK(p); sigexit(td, SIGILL); } regs->tf_rsp = (long)sfp; regs->tf_rip = p->p_sysent->sv_sigcode_base; regs->tf_rflags &= ~(PSL_T | PSL_D); regs->tf_cs = _ucodesel; regs->tf_ds = _udatasel; regs->tf_ss = _udatasel; regs->tf_es = _udatasel; regs->tf_fs = _ufssel; regs->tf_gs = _ugssel; regs->tf_flags = TF_HASSEGS; PROC_LOCK(p); mtx_lock(&psp->ps_mtx); } /* * System call to cleanup state after a signal * has been taken. Reset signal mask and * stack state from context left by sendsig (above). * Return to previous pc and psl as specified by * context left by sendsig. Check carefully to * make sure that the user has not modified the * state to gain improper privileges. * * MPSAFE */ int sys_sigreturn(td, uap) struct thread *td; struct sigreturn_args /* { const struct __ucontext *sigcntxp; } */ *uap; { ucontext_t uc; struct pcb *pcb; struct proc *p; struct trapframe *regs; ucontext_t *ucp; char *xfpustate; size_t xfpustate_len; long rflags; int cs, error, ret; ksiginfo_t ksi; pcb = td->td_pcb; p = td->td_proc; error = copyin(uap->sigcntxp, &uc, sizeof(uc)); if (error != 0) { uprintf("pid %d (%s): sigreturn copyin failed\n", p->p_pid, td->td_name); return (error); } ucp = &uc; if ((ucp->uc_mcontext.mc_flags & ~_MC_FLAG_MASK) != 0) { uprintf("pid %d (%s): sigreturn mc_flags %x\n", p->p_pid, td->td_name, ucp->uc_mcontext.mc_flags); return (EINVAL); } regs = td->td_frame; rflags = ucp->uc_mcontext.mc_rflags; /* * Don't allow users to change privileged or reserved flags. */ if (!EFL_SECURE(rflags, regs->tf_rflags)) { uprintf("pid %d (%s): sigreturn rflags = 0x%lx\n", p->p_pid, td->td_name, rflags); return (EINVAL); } /* * Don't allow users to load a valid privileged %cs. Let the * hardware check for invalid selectors, excess privilege in * other selectors, invalid %eip's and invalid %esp's. */ cs = ucp->uc_mcontext.mc_cs; if (!CS_SECURE(cs)) { uprintf("pid %d (%s): sigreturn cs = 0x%x\n", p->p_pid, td->td_name, cs); ksiginfo_init_trap(&ksi); ksi.ksi_signo = SIGBUS; ksi.ksi_code = BUS_OBJERR; ksi.ksi_trapno = T_PROTFLT; ksi.ksi_addr = (void *)regs->tf_rip; trapsignal(td, &ksi); return (EINVAL); } if ((uc.uc_mcontext.mc_flags & _MC_HASFPXSTATE) != 0) { xfpustate_len = uc.uc_mcontext.mc_xfpustate_len; if (xfpustate_len > cpu_max_ext_state_size - sizeof(struct savefpu)) { uprintf("pid %d (%s): sigreturn xfpusave_len = 0x%zx\n", p->p_pid, td->td_name, xfpustate_len); return (EINVAL); } xfpustate = __builtin_alloca(xfpustate_len); error = copyin((const void *)uc.uc_mcontext.mc_xfpustate, xfpustate, xfpustate_len); if (error != 0) { uprintf( "pid %d (%s): sigreturn copying xfpustate failed\n", p->p_pid, td->td_name); return (error); } } else { xfpustate = NULL; xfpustate_len = 0; } ret = set_fpcontext(td, &ucp->uc_mcontext, xfpustate, xfpustate_len); if (ret != 0) { uprintf("pid %d (%s): sigreturn set_fpcontext err %d\n", p->p_pid, td->td_name, ret); return (ret); } bcopy(&ucp->uc_mcontext.mc_rdi, regs, sizeof(*regs)); update_pcb_bases(pcb); pcb->pcb_fsbase = ucp->uc_mcontext.mc_fsbase; pcb->pcb_gsbase = ucp->uc_mcontext.mc_gsbase; #if defined(COMPAT_43) if (ucp->uc_mcontext.mc_onstack & 1) td->td_sigstk.ss_flags |= SS_ONSTACK; else td->td_sigstk.ss_flags &= ~SS_ONSTACK; #endif kern_sigprocmask(td, SIG_SETMASK, &ucp->uc_sigmask, NULL, 0); return (EJUSTRETURN); } #ifdef COMPAT_FREEBSD4 int freebsd4_sigreturn(struct thread *td, struct freebsd4_sigreturn_args *uap) { return sys_sigreturn(td, (struct sigreturn_args *)uap); } #endif /* * Reset registers to default values on exec. */ void exec_setregs(struct thread *td, struct image_params *imgp, u_long stack) { struct trapframe *regs = td->td_frame; struct pcb *pcb = td->td_pcb; - mtx_lock(&dt_lock); if (td->td_proc->p_md.md_ldt != NULL) user_ldt_free(td); - else - mtx_unlock(&dt_lock); - + update_pcb_bases(pcb); pcb->pcb_fsbase = 0; pcb->pcb_gsbase = 0; clear_pcb_flags(pcb, PCB_32BIT); pcb->pcb_initial_fpucw = __INITIAL_FPUCW__; bzero((char *)regs, sizeof(struct trapframe)); regs->tf_rip = imgp->entry_addr; regs->tf_rsp = ((stack - 8) & ~0xFul) + 8; regs->tf_rdi = stack; /* argv */ regs->tf_rflags = PSL_USER | (regs->tf_rflags & PSL_T); regs->tf_ss = _udatasel; regs->tf_cs = _ucodesel; regs->tf_ds = _udatasel; regs->tf_es = _udatasel; regs->tf_fs = _ufssel; regs->tf_gs = _ugssel; regs->tf_flags = TF_HASSEGS; td->td_retval[1] = 0; /* * Reset the hardware debug registers if they were in use. * They won't have any meaning for the newly exec'd process. */ if (pcb->pcb_flags & PCB_DBREGS) { pcb->pcb_dr0 = 0; pcb->pcb_dr1 = 0; pcb->pcb_dr2 = 0; pcb->pcb_dr3 = 0; pcb->pcb_dr6 = 0; pcb->pcb_dr7 = 0; if (pcb == curpcb) { /* * Clear the debug registers on the running * CPU, otherwise they will end up affecting * the next process we switch to. */ reset_dbregs(); } clear_pcb_flags(pcb, PCB_DBREGS); } /* * Drop the FP state if we hold it, so that the process gets a * clean FP state if it uses the FPU again. */ fpstate_drop(td); } void cpu_setregs(void) { register_t cr0; cr0 = rcr0(); /* * CR0_MP, CR0_NE and CR0_TS are also set by npx_probe() for the * BSP. See the comments there about why we set them. */ cr0 |= CR0_MP | CR0_NE | CR0_TS | CR0_WP | CR0_AM; load_cr0(cr0); } /* * Initialize amd64 and configure to run kernel */ /* * Initialize segments & interrupt table */ struct user_segment_descriptor gdt[NGDT * MAXCPU];/* global descriptor tables */ static struct gate_descriptor idt0[NIDT]; struct gate_descriptor *idt = &idt0[0]; /* interrupt descriptor table */ static char dblfault_stack[PAGE_SIZE] __aligned(16); static char nmi0_stack[PAGE_SIZE] __aligned(16); CTASSERT(sizeof(struct nmi_pcpu) == 16); struct amd64tss common_tss[MAXCPU]; /* * Software prototypes -- in more palatable form. * * Keep GUFS32, GUGS32, GUCODE32 and GUDATA at the same * slots as corresponding segments for i386 kernel. */ struct soft_segment_descriptor gdt_segs[] = { /* GNULL_SEL 0 Null Descriptor */ { .ssd_base = 0x0, .ssd_limit = 0x0, .ssd_type = 0, .ssd_dpl = 0, .ssd_p = 0, .ssd_long = 0, .ssd_def32 = 0, .ssd_gran = 0 }, /* GNULL2_SEL 1 Null Descriptor */ { .ssd_base = 0x0, .ssd_limit = 0x0, .ssd_type = 0, .ssd_dpl = 0, .ssd_p = 0, .ssd_long = 0, .ssd_def32 = 0, .ssd_gran = 0 }, /* GUFS32_SEL 2 32 bit %gs Descriptor for user */ { .ssd_base = 0x0, .ssd_limit = 0xfffff, .ssd_type = SDT_MEMRWA, .ssd_dpl = SEL_UPL, .ssd_p = 1, .ssd_long = 0, .ssd_def32 = 1, .ssd_gran = 1 }, /* GUGS32_SEL 3 32 bit %fs Descriptor for user */ { .ssd_base = 0x0, .ssd_limit = 0xfffff, .ssd_type = SDT_MEMRWA, .ssd_dpl = SEL_UPL, .ssd_p = 1, .ssd_long = 0, .ssd_def32 = 1, .ssd_gran = 1 }, /* GCODE_SEL 4 Code Descriptor for kernel */ { .ssd_base = 0x0, .ssd_limit = 0xfffff, .ssd_type = SDT_MEMERA, .ssd_dpl = SEL_KPL, .ssd_p = 1, .ssd_long = 1, .ssd_def32 = 0, .ssd_gran = 1 }, /* GDATA_SEL 5 Data Descriptor for kernel */ { .ssd_base = 0x0, .ssd_limit = 0xfffff, .ssd_type = SDT_MEMRWA, .ssd_dpl = SEL_KPL, .ssd_p = 1, .ssd_long = 1, .ssd_def32 = 0, .ssd_gran = 1 }, /* GUCODE32_SEL 6 32 bit Code Descriptor for user */ { .ssd_base = 0x0, .ssd_limit = 0xfffff, .ssd_type = SDT_MEMERA, .ssd_dpl = SEL_UPL, .ssd_p = 1, .ssd_long = 0, .ssd_def32 = 1, .ssd_gran = 1 }, /* GUDATA_SEL 7 32/64 bit Data Descriptor for user */ { .ssd_base = 0x0, .ssd_limit = 0xfffff, .ssd_type = SDT_MEMRWA, .ssd_dpl = SEL_UPL, .ssd_p = 1, .ssd_long = 0, .ssd_def32 = 1, .ssd_gran = 1 }, /* GUCODE_SEL 8 64 bit Code Descriptor for user */ { .ssd_base = 0x0, .ssd_limit = 0xfffff, .ssd_type = SDT_MEMERA, .ssd_dpl = SEL_UPL, .ssd_p = 1, .ssd_long = 1, .ssd_def32 = 0, .ssd_gran = 1 }, /* GPROC0_SEL 9 Proc 0 Tss Descriptor */ { .ssd_base = 0x0, .ssd_limit = sizeof(struct amd64tss) + IOPERM_BITMAP_SIZE - 1, .ssd_type = SDT_SYSTSS, .ssd_dpl = SEL_KPL, .ssd_p = 1, .ssd_long = 0, .ssd_def32 = 0, .ssd_gran = 0 }, /* Actually, the TSS is a system descriptor which is double size */ { .ssd_base = 0x0, .ssd_limit = 0x0, .ssd_type = 0, .ssd_dpl = 0, .ssd_p = 0, .ssd_long = 0, .ssd_def32 = 0, .ssd_gran = 0 }, /* GUSERLDT_SEL 11 LDT Descriptor */ { .ssd_base = 0x0, .ssd_limit = 0x0, .ssd_type = 0, .ssd_dpl = 0, .ssd_p = 0, .ssd_long = 0, .ssd_def32 = 0, .ssd_gran = 0 }, /* GUSERLDT_SEL 12 LDT Descriptor, double size */ { .ssd_base = 0x0, .ssd_limit = 0x0, .ssd_type = 0, .ssd_dpl = 0, .ssd_p = 0, .ssd_long = 0, .ssd_def32 = 0, .ssd_gran = 0 }, }; void setidt(int idx, inthand_t *func, int typ, int dpl, int ist) { struct gate_descriptor *ip; ip = idt + idx; ip->gd_looffset = (uintptr_t)func; ip->gd_selector = GSEL(GCODE_SEL, SEL_KPL); ip->gd_ist = ist; ip->gd_xx = 0; ip->gd_type = typ; ip->gd_dpl = dpl; ip->gd_p = 1; ip->gd_hioffset = ((uintptr_t)func)>>16 ; } extern inthand_t IDTVEC(div), IDTVEC(dbg), IDTVEC(nmi), IDTVEC(bpt), IDTVEC(ofl), IDTVEC(bnd), IDTVEC(ill), IDTVEC(dna), IDTVEC(fpusegm), IDTVEC(tss), IDTVEC(missing), IDTVEC(stk), IDTVEC(prot), IDTVEC(page), IDTVEC(mchk), IDTVEC(rsvd), IDTVEC(fpu), IDTVEC(align), IDTVEC(xmm), IDTVEC(dblfault), #ifdef KDTRACE_HOOKS IDTVEC(dtrace_ret), #endif #ifdef XENHVM IDTVEC(xen_intr_upcall), #endif IDTVEC(fast_syscall), IDTVEC(fast_syscall32); #ifdef DDB /* * Display the index and function name of any IDT entries that don't use * the default 'rsvd' entry point. */ DB_SHOW_COMMAND(idt, db_show_idt) { struct gate_descriptor *ip; int idx; uintptr_t func; ip = idt; for (idx = 0; idx < NIDT && !db_pager_quit; idx++) { func = ((long)ip->gd_hioffset << 16 | ip->gd_looffset); if (func != (uintptr_t)&IDTVEC(rsvd)) { db_printf("%3d\t", idx); db_printsym(func, DB_STGY_PROC); db_printf("\n"); } ip++; } } /* Show privileged registers. */ DB_SHOW_COMMAND(sysregs, db_show_sysregs) { struct { uint16_t limit; uint64_t base; } __packed idtr, gdtr; uint16_t ldt, tr; __asm __volatile("sidt %0" : "=m" (idtr)); db_printf("idtr\t0x%016lx/%04x\n", (u_long)idtr.base, (u_int)idtr.limit); __asm __volatile("sgdt %0" : "=m" (gdtr)); db_printf("gdtr\t0x%016lx/%04x\n", (u_long)gdtr.base, (u_int)gdtr.limit); __asm __volatile("sldt %0" : "=r" (ldt)); db_printf("ldtr\t0x%04x\n", ldt); __asm __volatile("str %0" : "=r" (tr)); db_printf("tr\t0x%04x\n", tr); db_printf("cr0\t0x%016lx\n", rcr0()); db_printf("cr2\t0x%016lx\n", rcr2()); db_printf("cr3\t0x%016lx\n", rcr3()); db_printf("cr4\t0x%016lx\n", rcr4()); if (rcr4() & CR4_XSAVE) db_printf("xcr0\t0x%016lx\n", rxcr(0)); db_printf("EFER\t0x%016lx\n", rdmsr(MSR_EFER)); if (cpu_feature2 & (CPUID2_VMX | CPUID2_SMX)) db_printf("FEATURES_CTL\t%016lx\n", rdmsr(MSR_IA32_FEATURE_CONTROL)); db_printf("DEBUG_CTL\t0x%016lx\n", rdmsr(MSR_DEBUGCTLMSR)); db_printf("PAT\t0x%016lx\n", rdmsr(MSR_PAT)); db_printf("GSBASE\t0x%016lx\n", rdmsr(MSR_GSBASE)); } DB_SHOW_COMMAND(dbregs, db_show_dbregs) { db_printf("dr0\t0x%016lx\n", rdr0()); db_printf("dr1\t0x%016lx\n", rdr1()); db_printf("dr2\t0x%016lx\n", rdr2()); db_printf("dr3\t0x%016lx\n", rdr3()); db_printf("dr6\t0x%016lx\n", rdr6()); db_printf("dr7\t0x%016lx\n", rdr7()); } #endif void sdtossd(sd, ssd) struct user_segment_descriptor *sd; struct soft_segment_descriptor *ssd; { ssd->ssd_base = (sd->sd_hibase << 24) | sd->sd_lobase; ssd->ssd_limit = (sd->sd_hilimit << 16) | sd->sd_lolimit; ssd->ssd_type = sd->sd_type; ssd->ssd_dpl = sd->sd_dpl; ssd->ssd_p = sd->sd_p; ssd->ssd_long = sd->sd_long; ssd->ssd_def32 = sd->sd_def32; ssd->ssd_gran = sd->sd_gran; } void ssdtosd(ssd, sd) struct soft_segment_descriptor *ssd; struct user_segment_descriptor *sd; { sd->sd_lobase = (ssd->ssd_base) & 0xffffff; sd->sd_hibase = (ssd->ssd_base >> 24) & 0xff; sd->sd_lolimit = (ssd->ssd_limit) & 0xffff; sd->sd_hilimit = (ssd->ssd_limit >> 16) & 0xf; sd->sd_type = ssd->ssd_type; sd->sd_dpl = ssd->ssd_dpl; sd->sd_p = ssd->ssd_p; sd->sd_long = ssd->ssd_long; sd->sd_def32 = ssd->ssd_def32; sd->sd_gran = ssd->ssd_gran; } void ssdtosyssd(ssd, sd) struct soft_segment_descriptor *ssd; struct system_segment_descriptor *sd; { sd->sd_lobase = (ssd->ssd_base) & 0xffffff; sd->sd_hibase = (ssd->ssd_base >> 24) & 0xfffffffffful; sd->sd_lolimit = (ssd->ssd_limit) & 0xffff; sd->sd_hilimit = (ssd->ssd_limit >> 16) & 0xf; sd->sd_type = ssd->ssd_type; sd->sd_dpl = ssd->ssd_dpl; sd->sd_p = ssd->ssd_p; sd->sd_gran = ssd->ssd_gran; } #if !defined(DEV_ATPIC) && defined(DEV_ISA) #include #include /* * Return a bitmap of the current interrupt requests. This is 8259-specific * and is only suitable for use at probe time. * This is only here to pacify sio. It is NOT FATAL if this doesn't work. * It shouldn't be here. There should probably be an APIC centric * implementation in the apic driver code, if at all. */ intrmask_t isa_irq_pending(void) { u_char irr1; u_char irr2; irr1 = inb(IO_ICU1); irr2 = inb(IO_ICU2); return ((irr2 << 8) | irr1); } #endif u_int basemem; static int add_physmap_entry(uint64_t base, uint64_t length, vm_paddr_t *physmap, int *physmap_idxp) { int i, insert_idx, physmap_idx; physmap_idx = *physmap_idxp; if (length == 0) return (1); /* * Find insertion point while checking for overlap. Start off by * assuming the new entry will be added to the end. * * NB: physmap_idx points to the next free slot. */ insert_idx = physmap_idx; for (i = 0; i <= physmap_idx; i += 2) { if (base < physmap[i + 1]) { if (base + length <= physmap[i]) { insert_idx = i; break; } if (boothowto & RB_VERBOSE) printf( "Overlapping memory regions, ignoring second region\n"); return (1); } } /* See if we can prepend to the next entry. */ if (insert_idx <= physmap_idx && base + length == physmap[insert_idx]) { physmap[insert_idx] = base; return (1); } /* See if we can append to the previous entry. */ if (insert_idx > 0 && base == physmap[insert_idx - 1]) { physmap[insert_idx - 1] += length; return (1); } physmap_idx += 2; *physmap_idxp = physmap_idx; if (physmap_idx == PHYSMAP_SIZE) { printf( "Too many segments in the physical address map, giving up\n"); return (0); } /* * Move the last 'N' entries down to make room for the new * entry if needed. */ for (i = (physmap_idx - 2); i > insert_idx; i -= 2) { physmap[i] = physmap[i - 2]; physmap[i + 1] = physmap[i - 1]; } /* Insert the new entry. */ physmap[insert_idx] = base; physmap[insert_idx + 1] = base + length; return (1); } void bios_add_smap_entries(struct bios_smap *smapbase, u_int32_t smapsize, vm_paddr_t *physmap, int *physmap_idx) { struct bios_smap *smap, *smapend; smapend = (struct bios_smap *)((uintptr_t)smapbase + smapsize); for (smap = smapbase; smap < smapend; smap++) { if (boothowto & RB_VERBOSE) printf("SMAP type=%02x base=%016lx len=%016lx\n", smap->type, smap->base, smap->length); if (smap->type != SMAP_TYPE_MEMORY) continue; if (!add_physmap_entry(smap->base, smap->length, physmap, physmap_idx)) break; } } static void add_efi_map_entries(struct efi_map_header *efihdr, vm_paddr_t *physmap, int *physmap_idx) { struct efi_md *map, *p; const char *type; size_t efisz; int ndesc, i; static const char *types[] = { "Reserved", "LoaderCode", "LoaderData", "BootServicesCode", "BootServicesData", "RuntimeServicesCode", "RuntimeServicesData", "ConventionalMemory", "UnusableMemory", "ACPIReclaimMemory", "ACPIMemoryNVS", "MemoryMappedIO", "MemoryMappedIOPortSpace", "PalCode", "PersistentMemory" }; /* * Memory map data provided by UEFI via the GetMemoryMap * Boot Services API. */ efisz = (sizeof(struct efi_map_header) + 0xf) & ~0xf; map = (struct efi_md *)((uint8_t *)efihdr + efisz); if (efihdr->descriptor_size == 0) return; ndesc = efihdr->memory_size / efihdr->descriptor_size; if (boothowto & RB_VERBOSE) printf("%23s %12s %12s %8s %4s\n", "Type", "Physical", "Virtual", "#Pages", "Attr"); for (i = 0, p = map; i < ndesc; i++, p = efi_next_descriptor(p, efihdr->descriptor_size)) { if (boothowto & RB_VERBOSE) { if (p->md_type < nitems(types)) type = types[p->md_type]; else type = ""; printf("%23s %012lx %12p %08lx ", type, p->md_phys, p->md_virt, p->md_pages); if (p->md_attr & EFI_MD_ATTR_UC) printf("UC "); if (p->md_attr & EFI_MD_ATTR_WC) printf("WC "); if (p->md_attr & EFI_MD_ATTR_WT) printf("WT "); if (p->md_attr & EFI_MD_ATTR_WB) printf("WB "); if (p->md_attr & EFI_MD_ATTR_UCE) printf("UCE "); if (p->md_attr & EFI_MD_ATTR_WP) printf("WP "); if (p->md_attr & EFI_MD_ATTR_RP) printf("RP "); if (p->md_attr & EFI_MD_ATTR_XP) printf("XP "); if (p->md_attr & EFI_MD_ATTR_NV) printf("NV "); if (p->md_attr & EFI_MD_ATTR_MORE_RELIABLE) printf("MORE_RELIABLE "); if (p->md_attr & EFI_MD_ATTR_RO) printf("RO "); if (p->md_attr & EFI_MD_ATTR_RT) printf("RUNTIME"); printf("\n"); } switch (p->md_type) { case EFI_MD_TYPE_CODE: case EFI_MD_TYPE_DATA: case EFI_MD_TYPE_BS_CODE: case EFI_MD_TYPE_BS_DATA: case EFI_MD_TYPE_FREE: /* * We're allowed to use any entry with these types. */ break; default: continue; } if (!add_physmap_entry(p->md_phys, (p->md_pages * PAGE_SIZE), physmap, physmap_idx)) break; } } static char bootmethod[16] = ""; SYSCTL_STRING(_machdep, OID_AUTO, bootmethod, CTLFLAG_RD, bootmethod, 0, "System firmware boot method"); static void native_parse_memmap(caddr_t kmdp, vm_paddr_t *physmap, int *physmap_idx) { struct bios_smap *smap; struct efi_map_header *efihdr; u_int32_t size; /* * Memory map from INT 15:E820. * * subr_module.c says: * "Consumer may safely assume that size value precedes data." * ie: an int32_t immediately precedes smap. */ efihdr = (struct efi_map_header *)preload_search_info(kmdp, MODINFO_METADATA | MODINFOMD_EFI_MAP); smap = (struct bios_smap *)preload_search_info(kmdp, MODINFO_METADATA | MODINFOMD_SMAP); if (efihdr == NULL && smap == NULL) panic("No BIOS smap or EFI map info from loader!"); if (efihdr != NULL) { add_efi_map_entries(efihdr, physmap, physmap_idx); strlcpy(bootmethod, "UEFI", sizeof(bootmethod)); } else { size = *((u_int32_t *)smap - 1); bios_add_smap_entries(smap, size, physmap, physmap_idx); strlcpy(bootmethod, "BIOS", sizeof(bootmethod)); } } #define PAGES_PER_GB (1024 * 1024 * 1024 / PAGE_SIZE) /* * Populate the (physmap) array with base/bound pairs describing the * available physical memory in the system, then test this memory and * build the phys_avail array describing the actually-available memory. * * Total memory size may be set by the kernel environment variable * hw.physmem or the compile-time define MAXMEM. * * XXX first should be vm_paddr_t. */ static void getmemsize(caddr_t kmdp, u_int64_t first) { int i, physmap_idx, pa_indx, da_indx; vm_paddr_t pa, physmap[PHYSMAP_SIZE]; u_long physmem_start, physmem_tunable, memtest; pt_entry_t *pte; quad_t dcons_addr, dcons_size; int page_counter; bzero(physmap, sizeof(physmap)); physmap_idx = 0; init_ops.parse_memmap(kmdp, physmap, &physmap_idx); physmap_idx -= 2; /* * Find the 'base memory' segment for SMP */ basemem = 0; for (i = 0; i <= physmap_idx; i += 2) { if (physmap[i] <= 0xA0000) { basemem = physmap[i + 1] / 1024; break; } } if (basemem == 0 || basemem > 640) { if (bootverbose) printf( "Memory map doesn't contain a basemem segment, faking it"); basemem = 640; } /* * Make hole for "AP -> long mode" bootstrap code. The * mp_bootaddress vector is only available when the kernel * is configured to support APs and APs for the system start * in 32bit mode (e.g. SMP bare metal). */ if (init_ops.mp_bootaddress) { if (physmap[1] >= 0x100000000) panic( "Basemem segment is not suitable for AP bootstrap code!"); physmap[1] = init_ops.mp_bootaddress(physmap[1] / 1024); } /* * Maxmem isn't the "maximum memory", it's one larger than the * highest page of the physical address space. It should be * called something like "Maxphyspage". We may adjust this * based on ``hw.physmem'' and the results of the memory test. */ Maxmem = atop(physmap[physmap_idx + 1]); #ifdef MAXMEM Maxmem = MAXMEM / 4; #endif if (TUNABLE_ULONG_FETCH("hw.physmem", &physmem_tunable)) Maxmem = atop(physmem_tunable); /* * The boot memory test is disabled by default, as it takes a * significant amount of time on large-memory systems, and is * unfriendly to virtual machines as it unnecessarily touches all * pages. * * A general name is used as the code may be extended to support * additional tests beyond the current "page present" test. */ memtest = 0; TUNABLE_ULONG_FETCH("hw.memtest.tests", &memtest); /* * Don't allow MAXMEM or hw.physmem to extend the amount of memory * in the system. */ if (Maxmem > atop(physmap[physmap_idx + 1])) Maxmem = atop(physmap[physmap_idx + 1]); if (atop(physmap[physmap_idx + 1]) != Maxmem && (boothowto & RB_VERBOSE)) printf("Physical memory use set to %ldK\n", Maxmem * 4); /* call pmap initialization to make new kernel address space */ pmap_bootstrap(&first); /* * Size up each available chunk of physical memory. * * XXX Some BIOSes corrupt low 64KB between suspend and resume. * By default, mask off the first 16 pages unless we appear to be * running in a VM. */ physmem_start = (vm_guest > VM_GUEST_NO ? 1 : 16) << PAGE_SHIFT; TUNABLE_ULONG_FETCH("hw.physmem.start", &physmem_start); if (physmap[0] < physmem_start) { if (physmem_start < PAGE_SIZE) physmap[0] = PAGE_SIZE; else if (physmem_start >= physmap[1]) physmap[0] = round_page(physmap[1] - PAGE_SIZE); else physmap[0] = round_page(physmem_start); } pa_indx = 0; da_indx = 1; phys_avail[pa_indx++] = physmap[0]; phys_avail[pa_indx] = physmap[0]; dump_avail[da_indx] = physmap[0]; pte = CMAP1; /* * Get dcons buffer address */ if (getenv_quad("dcons.addr", &dcons_addr) == 0 || getenv_quad("dcons.size", &dcons_size) == 0) dcons_addr = 0; /* * physmap is in bytes, so when converting to page boundaries, * round up the start address and round down the end address. */ page_counter = 0; if (memtest != 0) printf("Testing system memory"); for (i = 0; i <= physmap_idx; i += 2) { vm_paddr_t end; end = ptoa((vm_paddr_t)Maxmem); if (physmap[i + 1] < end) end = trunc_page(physmap[i + 1]); for (pa = round_page(physmap[i]); pa < end; pa += PAGE_SIZE) { int tmp, page_bad, full; int *ptr = (int *)CADDR1; full = FALSE; /* * block out kernel memory as not available. */ if (pa >= (vm_paddr_t)kernphys && pa < first) goto do_dump_avail; /* * block out dcons buffer */ if (dcons_addr > 0 && pa >= trunc_page(dcons_addr) && pa < dcons_addr + dcons_size) goto do_dump_avail; page_bad = FALSE; if (memtest == 0) goto skip_memtest; /* * Print a "." every GB to show we're making * progress. */ page_counter++; if ((page_counter % PAGES_PER_GB) == 0) printf("."); /* * map page into kernel: valid, read/write,non-cacheable */ *pte = pa | PG_V | PG_RW | PG_NC_PWT | PG_NC_PCD; invltlb(); tmp = *(int *)ptr; /* * Test for alternating 1's and 0's */ *(volatile int *)ptr = 0xaaaaaaaa; if (*(volatile int *)ptr != 0xaaaaaaaa) page_bad = TRUE; /* * Test for alternating 0's and 1's */ *(volatile int *)ptr = 0x55555555; if (*(volatile int *)ptr != 0x55555555) page_bad = TRUE; /* * Test for all 1's */ *(volatile int *)ptr = 0xffffffff; if (*(volatile int *)ptr != 0xffffffff) page_bad = TRUE; /* * Test for all 0's */ *(volatile int *)ptr = 0x0; if (*(volatile int *)ptr != 0x0) page_bad = TRUE; /* * Restore original value. */ *(int *)ptr = tmp; skip_memtest: /* * Adjust array of valid/good pages. */ if (page_bad == TRUE) continue; /* * If this good page is a continuation of the * previous set of good pages, then just increase * the end pointer. Otherwise start a new chunk. * Note that "end" points one higher than end, * making the range >= start and < end. * If we're also doing a speculative memory * test and we at or past the end, bump up Maxmem * so that we keep going. The first bad page * will terminate the loop. */ if (phys_avail[pa_indx] == pa) { phys_avail[pa_indx] += PAGE_SIZE; } else { pa_indx++; if (pa_indx == PHYS_AVAIL_ARRAY_END) { printf( "Too many holes in the physical address space, giving up\n"); pa_indx--; full = TRUE; goto do_dump_avail; } phys_avail[pa_indx++] = pa; /* start */ phys_avail[pa_indx] = pa + PAGE_SIZE; /* end */ } physmem++; do_dump_avail: if (dump_avail[da_indx] == pa) { dump_avail[da_indx] += PAGE_SIZE; } else { da_indx++; if (da_indx == DUMP_AVAIL_ARRAY_END) { da_indx--; goto do_next; } dump_avail[da_indx++] = pa; /* start */ dump_avail[da_indx] = pa + PAGE_SIZE; /* end */ } do_next: if (full) break; } } *pte = 0; invltlb(); if (memtest != 0) printf("\n"); /* * XXX * The last chunk must contain at least one page plus the message * buffer to avoid complicating other code (message buffer address * calculation, etc.). */ while (phys_avail[pa_indx - 1] + PAGE_SIZE + round_page(msgbufsize) >= phys_avail[pa_indx]) { physmem -= atop(phys_avail[pa_indx] - phys_avail[pa_indx - 1]); phys_avail[pa_indx--] = 0; phys_avail[pa_indx--] = 0; } Maxmem = atop(phys_avail[pa_indx]); /* Trim off space for the message buffer. */ phys_avail[pa_indx] -= round_page(msgbufsize); /* Map the message buffer. */ msgbufp = (struct msgbuf *)PHYS_TO_DMAP(phys_avail[pa_indx]); } static caddr_t native_parse_preload_data(u_int64_t modulep) { caddr_t kmdp; char *envp; #ifdef DDB vm_offset_t ksym_start; vm_offset_t ksym_end; #endif preload_metadata = (caddr_t)(uintptr_t)(modulep + KERNBASE); preload_bootstrap_relocate(KERNBASE); kmdp = preload_search_by_type("elf kernel"); if (kmdp == NULL) kmdp = preload_search_by_type("elf64 kernel"); boothowto = MD_FETCH(kmdp, MODINFOMD_HOWTO, int); envp = MD_FETCH(kmdp, MODINFOMD_ENVP, char *); if (envp != NULL) envp += KERNBASE; init_static_kenv(envp, 0); #ifdef DDB ksym_start = MD_FETCH(kmdp, MODINFOMD_SSYM, uintptr_t); ksym_end = MD_FETCH(kmdp, MODINFOMD_ESYM, uintptr_t); db_fetch_ksymtab(ksym_start, ksym_end); #endif efi_systbl_phys = MD_FETCH(kmdp, MODINFOMD_FW_HANDLE, vm_paddr_t); return (kmdp); } static void amd64_kdb_init(void) { kdb_init(); #ifdef KDB if (boothowto & RB_KDB) kdb_enter(KDB_WHY_BOOTFLAGS, "Boot flags requested debugger"); #endif } u_int64_t hammer_time(u_int64_t modulep, u_int64_t physfree) { caddr_t kmdp; int gsel_tss, x; struct pcpu *pc; struct nmi_pcpu *np; struct xstate_hdr *xhdr; u_int64_t msr; char *env; size_t kstack0_sz; int late_console; /* * This may be done better later if it gets more high level * components in it. If so just link td->td_proc here. */ proc_linkup0(&proc0, &thread0); kmdp = init_ops.parse_preload_data(modulep); identify_cpu(); identify_hypervisor(); /* Init basic tunables, hz etc */ init_param1(); thread0.td_kstack = physfree + KERNBASE; thread0.td_kstack_pages = kstack_pages; kstack0_sz = thread0.td_kstack_pages * PAGE_SIZE; bzero((void *)thread0.td_kstack, kstack0_sz); physfree += kstack0_sz; /* * make gdt memory segments */ for (x = 0; x < NGDT; x++) { if (x != GPROC0_SEL && x != (GPROC0_SEL + 1) && x != GUSERLDT_SEL && x != (GUSERLDT_SEL) + 1) ssdtosd(&gdt_segs[x], &gdt[x]); } gdt_segs[GPROC0_SEL].ssd_base = (uintptr_t)&common_tss[0]; ssdtosyssd(&gdt_segs[GPROC0_SEL], (struct system_segment_descriptor *)&gdt[GPROC0_SEL]); r_gdt.rd_limit = NGDT * sizeof(gdt[0]) - 1; r_gdt.rd_base = (long) gdt; lgdt(&r_gdt); pc = &__pcpu[0]; wrmsr(MSR_FSBASE, 0); /* User value */ wrmsr(MSR_GSBASE, (u_int64_t)pc); wrmsr(MSR_KGSBASE, 0); /* User value while in the kernel */ pcpu_init(pc, 0, sizeof(struct pcpu)); dpcpu_init((void *)(physfree + KERNBASE), 0); physfree += DPCPU_SIZE; PCPU_SET(prvspace, pc); PCPU_SET(curthread, &thread0); /* Non-late cninit() and printf() can be moved up to here. */ PCPU_SET(tssp, &common_tss[0]); PCPU_SET(commontssp, &common_tss[0]); PCPU_SET(tss, (struct system_segment_descriptor *)&gdt[GPROC0_SEL]); PCPU_SET(ldt, (struct system_segment_descriptor *)&gdt[GUSERLDT_SEL]); PCPU_SET(fs32p, &gdt[GUFS32_SEL]); PCPU_SET(gs32p, &gdt[GUGS32_SEL]); /* * Initialize mutexes. * * icu_lock: in order to allow an interrupt to occur in a critical * section, to set pcpu->ipending (etc...) properly, we * must be able to get the icu lock, so it can't be * under witness. */ mutex_init(); mtx_init(&icu_lock, "icu", NULL, MTX_SPIN | MTX_NOWITNESS); mtx_init(&dt_lock, "descriptor tables", NULL, MTX_DEF); /* exceptions */ for (x = 0; x < NIDT; x++) setidt(x, &IDTVEC(rsvd), SDT_SYSIGT, SEL_KPL, 0); setidt(IDT_DE, &IDTVEC(div), SDT_SYSIGT, SEL_KPL, 0); setidt(IDT_DB, &IDTVEC(dbg), SDT_SYSIGT, SEL_KPL, 0); setidt(IDT_NMI, &IDTVEC(nmi), SDT_SYSIGT, SEL_KPL, 2); setidt(IDT_BP, &IDTVEC(bpt), SDT_SYSIGT, SEL_UPL, 0); setidt(IDT_OF, &IDTVEC(ofl), SDT_SYSIGT, SEL_KPL, 0); setidt(IDT_BR, &IDTVEC(bnd), SDT_SYSIGT, SEL_KPL, 0); setidt(IDT_UD, &IDTVEC(ill), SDT_SYSIGT, SEL_KPL, 0); setidt(IDT_NM, &IDTVEC(dna), SDT_SYSIGT, SEL_KPL, 0); setidt(IDT_DF, &IDTVEC(dblfault), SDT_SYSIGT, SEL_KPL, 1); setidt(IDT_FPUGP, &IDTVEC(fpusegm), SDT_SYSIGT, SEL_KPL, 0); setidt(IDT_TS, &IDTVEC(tss), SDT_SYSIGT, SEL_KPL, 0); setidt(IDT_NP, &IDTVEC(missing), SDT_SYSIGT, SEL_KPL, 0); setidt(IDT_SS, &IDTVEC(stk), SDT_SYSIGT, SEL_KPL, 0); setidt(IDT_GP, &IDTVEC(prot), SDT_SYSIGT, SEL_KPL, 0); setidt(IDT_PF, &IDTVEC(page), SDT_SYSIGT, SEL_KPL, 0); setidt(IDT_MF, &IDTVEC(fpu), SDT_SYSIGT, SEL_KPL, 0); setidt(IDT_AC, &IDTVEC(align), SDT_SYSIGT, SEL_KPL, 0); setidt(IDT_MC, &IDTVEC(mchk), SDT_SYSIGT, SEL_KPL, 0); setidt(IDT_XF, &IDTVEC(xmm), SDT_SYSIGT, SEL_KPL, 0); #ifdef KDTRACE_HOOKS setidt(IDT_DTRACE_RET, &IDTVEC(dtrace_ret), SDT_SYSIGT, SEL_UPL, 0); #endif #ifdef XENHVM setidt(IDT_EVTCHN, &IDTVEC(xen_intr_upcall), SDT_SYSIGT, SEL_UPL, 0); #endif r_idt.rd_limit = sizeof(idt0) - 1; r_idt.rd_base = (long) idt; lidt(&r_idt); /* * Initialize the clock before the console so that console * initialization can use DELAY(). */ clock_init(); /* * Use vt(4) by default for UEFI boot (during the sc(4)/vt(4) * transition). * Once bootblocks have updated, we can test directly for * efi_systbl != NULL here... */ if (preload_search_info(kmdp, MODINFO_METADATA | MODINFOMD_EFI_MAP) != NULL) vty_set_preferred(VTY_VT); finishidentcpu(); /* Final stage of CPU initialization */ initializecpu(); /* Initialize CPU registers */ initializecpucache(); /* doublefault stack space, runs on ist1 */ common_tss[0].tss_ist1 = (long)&dblfault_stack[sizeof(dblfault_stack)]; /* * NMI stack, runs on ist2. The pcpu pointer is stored just * above the start of the ist2 stack. */ np = ((struct nmi_pcpu *) &nmi0_stack[sizeof(nmi0_stack)]) - 1; np->np_pcpu = (register_t) pc; common_tss[0].tss_ist2 = (long) np; /* Set the IO permission bitmap (empty due to tss seg limit) */ common_tss[0].tss_iobase = sizeof(struct amd64tss) + IOPERM_BITMAP_SIZE; gsel_tss = GSEL(GPROC0_SEL, SEL_KPL); ltr(gsel_tss); /* Set up the fast syscall stuff */ msr = rdmsr(MSR_EFER) | EFER_SCE; wrmsr(MSR_EFER, msr); wrmsr(MSR_LSTAR, (u_int64_t)IDTVEC(fast_syscall)); wrmsr(MSR_CSTAR, (u_int64_t)IDTVEC(fast_syscall32)); msr = ((u_int64_t)GSEL(GCODE_SEL, SEL_KPL) << 32) | ((u_int64_t)GSEL(GUCODE32_SEL, SEL_UPL) << 48); wrmsr(MSR_STAR, msr); wrmsr(MSR_SF_MASK, PSL_NT|PSL_T|PSL_I|PSL_C|PSL_D); /* * Temporary forge some valid pointer to PCB, for exception * handlers. It is reinitialized properly below after FPU is * set up. Also set up td_critnest to short-cut the page * fault handler. */ cpu_max_ext_state_size = sizeof(struct savefpu); thread0.td_pcb = get_pcb_td(&thread0); thread0.td_critnest = 1; /* * The console and kdb should be initialized even earlier than here, * but some console drivers don't work until after getmemsize(). * Default to late console initialization to support these drivers. * This loses mainly printf()s in getmemsize() and early debugging. */ late_console = 1; TUNABLE_INT_FETCH("debug.late_console", &late_console); if (!late_console) { cninit(); amd64_kdb_init(); } getmemsize(kmdp, physfree); init_param2(physmem); /* now running on new page tables, configured,and u/iom is accessible */ if (late_console) cninit(); #ifdef DEV_ISA #ifdef DEV_ATPIC elcr_probe(); atpic_startup(); #else /* Reset and mask the atpics and leave them shut down. */ atpic_reset(); /* * Point the ICU spurious interrupt vectors at the APIC spurious * interrupt handler. */ setidt(IDT_IO_INTS + 7, IDTVEC(spuriousint), SDT_SYSIGT, SEL_KPL, 0); setidt(IDT_IO_INTS + 15, IDTVEC(spuriousint), SDT_SYSIGT, SEL_KPL, 0); #endif #else #error "have you forgotten the isa device?"; #endif if (late_console) amd64_kdb_init(); msgbufinit(msgbufp, msgbufsize); fpuinit(); /* * Set up thread0 pcb after fpuinit calculated pcb + fpu save * area size. Zero out the extended state header in fpu save * area. */ thread0.td_pcb = get_pcb_td(&thread0); thread0.td_pcb->pcb_save = get_pcb_user_save_td(&thread0); bzero(get_pcb_user_save_td(&thread0), cpu_max_ext_state_size); if (use_xsave) { xhdr = (struct xstate_hdr *)(get_pcb_user_save_td(&thread0) + 1); xhdr->xstate_bv = xsave_mask; } /* make an initial tss so cpu can get interrupt stack on syscall! */ common_tss[0].tss_rsp0 = (vm_offset_t)thread0.td_pcb; /* Ensure the stack is aligned to 16 bytes */ common_tss[0].tss_rsp0 &= ~0xFul; PCPU_SET(rsp0, common_tss[0].tss_rsp0); PCPU_SET(curpcb, thread0.td_pcb); /* transfer to user mode */ _ucodesel = GSEL(GUCODE_SEL, SEL_UPL); _udatasel = GSEL(GUDATA_SEL, SEL_UPL); _ucode32sel = GSEL(GUCODE32_SEL, SEL_UPL); _ufssel = GSEL(GUFS32_SEL, SEL_UPL); _ugssel = GSEL(GUGS32_SEL, SEL_UPL); load_ds(_udatasel); load_es(_udatasel); load_fs(_ufssel); /* setup proc 0's pcb */ thread0.td_pcb->pcb_flags = 0; thread0.td_frame = &proc0_tf; env = kern_getenv("kernelname"); if (env != NULL) strlcpy(kernelname, env, sizeof(kernelname)); cpu_probe_amdc1e(); #ifdef FDT x86_init_fdt(); #endif thread0.td_critnest = 0; /* Location of kernel stack for locore */ return ((u_int64_t)thread0.td_pcb); } void cpu_pcpu_init(struct pcpu *pcpu, int cpuid, size_t size) { pcpu->pc_acpi_id = 0xffffffff; } static int smap_sysctl_handler(SYSCTL_HANDLER_ARGS) { struct bios_smap *smapbase; struct bios_smap_xattr smap; caddr_t kmdp; uint32_t *smapattr; int count, error, i; /* Retrieve the system memory map from the loader. */ kmdp = preload_search_by_type("elf kernel"); if (kmdp == NULL) kmdp = preload_search_by_type("elf64 kernel"); smapbase = (struct bios_smap *)preload_search_info(kmdp, MODINFO_METADATA | MODINFOMD_SMAP); if (smapbase == NULL) return (0); smapattr = (uint32_t *)preload_search_info(kmdp, MODINFO_METADATA | MODINFOMD_SMAP_XATTR); count = *((uint32_t *)smapbase - 1) / sizeof(*smapbase); error = 0; for (i = 0; i < count; i++) { smap.base = smapbase[i].base; smap.length = smapbase[i].length; smap.type = smapbase[i].type; if (smapattr != NULL) smap.xattr = smapattr[i]; else smap.xattr = 0; error = SYSCTL_OUT(req, &smap, sizeof(smap)); } return (error); } SYSCTL_PROC(_machdep, OID_AUTO, smap, CTLTYPE_OPAQUE|CTLFLAG_RD, NULL, 0, smap_sysctl_handler, "S,bios_smap_xattr", "Raw BIOS SMAP data"); static int efi_map_sysctl_handler(SYSCTL_HANDLER_ARGS) { struct efi_map_header *efihdr; caddr_t kmdp; uint32_t efisize; kmdp = preload_search_by_type("elf kernel"); if (kmdp == NULL) kmdp = preload_search_by_type("elf64 kernel"); efihdr = (struct efi_map_header *)preload_search_info(kmdp, MODINFO_METADATA | MODINFOMD_EFI_MAP); if (efihdr == NULL) return (0); efisize = *((uint32_t *)efihdr - 1); return (SYSCTL_OUT(req, efihdr, efisize)); } SYSCTL_PROC(_machdep, OID_AUTO, efi_map, CTLTYPE_OPAQUE|CTLFLAG_RD, NULL, 0, efi_map_sysctl_handler, "S,efi_map_header", "Raw EFI Memory Map"); void spinlock_enter(void) { struct thread *td; register_t flags; td = curthread; if (td->td_md.md_spinlock_count == 0) { flags = intr_disable(); td->td_md.md_spinlock_count = 1; td->td_md.md_saved_flags = flags; } else td->td_md.md_spinlock_count++; critical_enter(); } void spinlock_exit(void) { struct thread *td; register_t flags; td = curthread; critical_exit(); flags = td->td_md.md_saved_flags; td->td_md.md_spinlock_count--; if (td->td_md.md_spinlock_count == 0) intr_restore(flags); } /* * Construct a PCB from a trapframe. This is called from kdb_trap() where * we want to start a backtrace from the function that caused us to enter * the debugger. We have the context in the trapframe, but base the trace * on the PCB. The PCB doesn't have to be perfect, as long as it contains * enough for a backtrace. */ void makectx(struct trapframe *tf, struct pcb *pcb) { pcb->pcb_r12 = tf->tf_r12; pcb->pcb_r13 = tf->tf_r13; pcb->pcb_r14 = tf->tf_r14; pcb->pcb_r15 = tf->tf_r15; pcb->pcb_rbp = tf->tf_rbp; pcb->pcb_rbx = tf->tf_rbx; pcb->pcb_rip = tf->tf_rip; pcb->pcb_rsp = tf->tf_rsp; } int ptrace_set_pc(struct thread *td, unsigned long addr) { td->td_frame->tf_rip = addr; set_pcb_flags(td->td_pcb, PCB_FULL_IRET); return (0); } int ptrace_single_step(struct thread *td) { td->td_frame->tf_rflags |= PSL_T; return (0); } int ptrace_clear_single_step(struct thread *td) { td->td_frame->tf_rflags &= ~PSL_T; return (0); } int fill_regs(struct thread *td, struct reg *regs) { struct trapframe *tp; tp = td->td_frame; return (fill_frame_regs(tp, regs)); } int fill_frame_regs(struct trapframe *tp, struct reg *regs) { regs->r_r15 = tp->tf_r15; regs->r_r14 = tp->tf_r14; regs->r_r13 = tp->tf_r13; regs->r_r12 = tp->tf_r12; regs->r_r11 = tp->tf_r11; regs->r_r10 = tp->tf_r10; regs->r_r9 = tp->tf_r9; regs->r_r8 = tp->tf_r8; regs->r_rdi = tp->tf_rdi; regs->r_rsi = tp->tf_rsi; regs->r_rbp = tp->tf_rbp; regs->r_rbx = tp->tf_rbx; regs->r_rdx = tp->tf_rdx; regs->r_rcx = tp->tf_rcx; regs->r_rax = tp->tf_rax; regs->r_rip = tp->tf_rip; regs->r_cs = tp->tf_cs; regs->r_rflags = tp->tf_rflags; regs->r_rsp = tp->tf_rsp; regs->r_ss = tp->tf_ss; if (tp->tf_flags & TF_HASSEGS) { regs->r_ds = tp->tf_ds; regs->r_es = tp->tf_es; regs->r_fs = tp->tf_fs; regs->r_gs = tp->tf_gs; } else { regs->r_ds = 0; regs->r_es = 0; regs->r_fs = 0; regs->r_gs = 0; } return (0); } int set_regs(struct thread *td, struct reg *regs) { struct trapframe *tp; register_t rflags; tp = td->td_frame; rflags = regs->r_rflags & 0xffffffff; if (!EFL_SECURE(rflags, tp->tf_rflags) || !CS_SECURE(regs->r_cs)) return (EINVAL); tp->tf_r15 = regs->r_r15; tp->tf_r14 = regs->r_r14; tp->tf_r13 = regs->r_r13; tp->tf_r12 = regs->r_r12; tp->tf_r11 = regs->r_r11; tp->tf_r10 = regs->r_r10; tp->tf_r9 = regs->r_r9; tp->tf_r8 = regs->r_r8; tp->tf_rdi = regs->r_rdi; tp->tf_rsi = regs->r_rsi; tp->tf_rbp = regs->r_rbp; tp->tf_rbx = regs->r_rbx; tp->tf_rdx = regs->r_rdx; tp->tf_rcx = regs->r_rcx; tp->tf_rax = regs->r_rax; tp->tf_rip = regs->r_rip; tp->tf_cs = regs->r_cs; tp->tf_rflags = rflags; tp->tf_rsp = regs->r_rsp; tp->tf_ss = regs->r_ss; if (0) { /* XXXKIB */ tp->tf_ds = regs->r_ds; tp->tf_es = regs->r_es; tp->tf_fs = regs->r_fs; tp->tf_gs = regs->r_gs; tp->tf_flags = TF_HASSEGS; } set_pcb_flags(td->td_pcb, PCB_FULL_IRET); return (0); } /* XXX check all this stuff! */ /* externalize from sv_xmm */ static void fill_fpregs_xmm(struct savefpu *sv_xmm, struct fpreg *fpregs) { struct envxmm *penv_fpreg = (struct envxmm *)&fpregs->fpr_env; struct envxmm *penv_xmm = &sv_xmm->sv_env; int i; /* pcb -> fpregs */ bzero(fpregs, sizeof(*fpregs)); /* FPU control/status */ penv_fpreg->en_cw = penv_xmm->en_cw; penv_fpreg->en_sw = penv_xmm->en_sw; penv_fpreg->en_tw = penv_xmm->en_tw; penv_fpreg->en_opcode = penv_xmm->en_opcode; penv_fpreg->en_rip = penv_xmm->en_rip; penv_fpreg->en_rdp = penv_xmm->en_rdp; penv_fpreg->en_mxcsr = penv_xmm->en_mxcsr; penv_fpreg->en_mxcsr_mask = penv_xmm->en_mxcsr_mask; /* FPU registers */ for (i = 0; i < 8; ++i) bcopy(sv_xmm->sv_fp[i].fp_acc.fp_bytes, fpregs->fpr_acc[i], 10); /* SSE registers */ for (i = 0; i < 16; ++i) bcopy(sv_xmm->sv_xmm[i].xmm_bytes, fpregs->fpr_xacc[i], 16); } /* internalize from fpregs into sv_xmm */ static void set_fpregs_xmm(struct fpreg *fpregs, struct savefpu *sv_xmm) { struct envxmm *penv_xmm = &sv_xmm->sv_env; struct envxmm *penv_fpreg = (struct envxmm *)&fpregs->fpr_env; int i; /* fpregs -> pcb */ /* FPU control/status */ penv_xmm->en_cw = penv_fpreg->en_cw; penv_xmm->en_sw = penv_fpreg->en_sw; penv_xmm->en_tw = penv_fpreg->en_tw; penv_xmm->en_opcode = penv_fpreg->en_opcode; penv_xmm->en_rip = penv_fpreg->en_rip; penv_xmm->en_rdp = penv_fpreg->en_rdp; penv_xmm->en_mxcsr = penv_fpreg->en_mxcsr; penv_xmm->en_mxcsr_mask = penv_fpreg->en_mxcsr_mask & cpu_mxcsr_mask; /* FPU registers */ for (i = 0; i < 8; ++i) bcopy(fpregs->fpr_acc[i], sv_xmm->sv_fp[i].fp_acc.fp_bytes, 10); /* SSE registers */ for (i = 0; i < 16; ++i) bcopy(fpregs->fpr_xacc[i], sv_xmm->sv_xmm[i].xmm_bytes, 16); } /* externalize from td->pcb */ int fill_fpregs(struct thread *td, struct fpreg *fpregs) { KASSERT(td == curthread || TD_IS_SUSPENDED(td) || P_SHOULDSTOP(td->td_proc), ("not suspended thread %p", td)); fpugetregs(td); fill_fpregs_xmm(get_pcb_user_save_td(td), fpregs); return (0); } /* internalize to td->pcb */ int set_fpregs(struct thread *td, struct fpreg *fpregs) { set_fpregs_xmm(fpregs, get_pcb_user_save_td(td)); fpuuserinited(td); return (0); } /* * Get machine context. */ int get_mcontext(struct thread *td, mcontext_t *mcp, int flags) { struct pcb *pcb; struct trapframe *tp; pcb = td->td_pcb; tp = td->td_frame; PROC_LOCK(curthread->td_proc); mcp->mc_onstack = sigonstack(tp->tf_rsp); PROC_UNLOCK(curthread->td_proc); mcp->mc_r15 = tp->tf_r15; mcp->mc_r14 = tp->tf_r14; mcp->mc_r13 = tp->tf_r13; mcp->mc_r12 = tp->tf_r12; mcp->mc_r11 = tp->tf_r11; mcp->mc_r10 = tp->tf_r10; mcp->mc_r9 = tp->tf_r9; mcp->mc_r8 = tp->tf_r8; mcp->mc_rdi = tp->tf_rdi; mcp->mc_rsi = tp->tf_rsi; mcp->mc_rbp = tp->tf_rbp; mcp->mc_rbx = tp->tf_rbx; mcp->mc_rcx = tp->tf_rcx; mcp->mc_rflags = tp->tf_rflags; if (flags & GET_MC_CLEAR_RET) { mcp->mc_rax = 0; mcp->mc_rdx = 0; mcp->mc_rflags &= ~PSL_C; } else { mcp->mc_rax = tp->tf_rax; mcp->mc_rdx = tp->tf_rdx; } mcp->mc_rip = tp->tf_rip; mcp->mc_cs = tp->tf_cs; mcp->mc_rsp = tp->tf_rsp; mcp->mc_ss = tp->tf_ss; mcp->mc_ds = tp->tf_ds; mcp->mc_es = tp->tf_es; mcp->mc_fs = tp->tf_fs; mcp->mc_gs = tp->tf_gs; mcp->mc_flags = tp->tf_flags; mcp->mc_len = sizeof(*mcp); get_fpcontext(td, mcp, NULL, 0); update_pcb_bases(pcb); mcp->mc_fsbase = pcb->pcb_fsbase; mcp->mc_gsbase = pcb->pcb_gsbase; mcp->mc_xfpustate = 0; mcp->mc_xfpustate_len = 0; bzero(mcp->mc_spare, sizeof(mcp->mc_spare)); return (0); } /* * Set machine context. * * However, we don't set any but the user modifiable flags, and we won't * touch the cs selector. */ int set_mcontext(struct thread *td, mcontext_t *mcp) { struct pcb *pcb; struct trapframe *tp; char *xfpustate; long rflags; int ret; pcb = td->td_pcb; tp = td->td_frame; if (mcp->mc_len != sizeof(*mcp) || (mcp->mc_flags & ~_MC_FLAG_MASK) != 0) return (EINVAL); rflags = (mcp->mc_rflags & PSL_USERCHANGE) | (tp->tf_rflags & ~PSL_USERCHANGE); if (mcp->mc_flags & _MC_HASFPXSTATE) { if (mcp->mc_xfpustate_len > cpu_max_ext_state_size - sizeof(struct savefpu)) return (EINVAL); xfpustate = __builtin_alloca(mcp->mc_xfpustate_len); ret = copyin((void *)mcp->mc_xfpustate, xfpustate, mcp->mc_xfpustate_len); if (ret != 0) return (ret); } else xfpustate = NULL; ret = set_fpcontext(td, mcp, xfpustate, mcp->mc_xfpustate_len); if (ret != 0) return (ret); tp->tf_r15 = mcp->mc_r15; tp->tf_r14 = mcp->mc_r14; tp->tf_r13 = mcp->mc_r13; tp->tf_r12 = mcp->mc_r12; tp->tf_r11 = mcp->mc_r11; tp->tf_r10 = mcp->mc_r10; tp->tf_r9 = mcp->mc_r9; tp->tf_r8 = mcp->mc_r8; tp->tf_rdi = mcp->mc_rdi; tp->tf_rsi = mcp->mc_rsi; tp->tf_rbp = mcp->mc_rbp; tp->tf_rbx = mcp->mc_rbx; tp->tf_rdx = mcp->mc_rdx; tp->tf_rcx = mcp->mc_rcx; tp->tf_rax = mcp->mc_rax; tp->tf_rip = mcp->mc_rip; tp->tf_rflags = rflags; tp->tf_rsp = mcp->mc_rsp; tp->tf_ss = mcp->mc_ss; tp->tf_flags = mcp->mc_flags; if (tp->tf_flags & TF_HASSEGS) { tp->tf_ds = mcp->mc_ds; tp->tf_es = mcp->mc_es; tp->tf_fs = mcp->mc_fs; tp->tf_gs = mcp->mc_gs; } set_pcb_flags(pcb, PCB_FULL_IRET); if (mcp->mc_flags & _MC_HASBASES) { pcb->pcb_fsbase = mcp->mc_fsbase; pcb->pcb_gsbase = mcp->mc_gsbase; } return (0); } static void get_fpcontext(struct thread *td, mcontext_t *mcp, char *xfpusave, size_t xfpusave_len) { size_t max_len, len; mcp->mc_ownedfp = fpugetregs(td); bcopy(get_pcb_user_save_td(td), &mcp->mc_fpstate[0], sizeof(mcp->mc_fpstate)); mcp->mc_fpformat = fpuformat(); if (!use_xsave || xfpusave_len == 0) return; max_len = cpu_max_ext_state_size - sizeof(struct savefpu); len = xfpusave_len; if (len > max_len) { len = max_len; bzero(xfpusave + max_len, len - max_len); } mcp->mc_flags |= _MC_HASFPXSTATE; mcp->mc_xfpustate_len = len; bcopy(get_pcb_user_save_td(td) + 1, xfpusave, len); } static int set_fpcontext(struct thread *td, mcontext_t *mcp, char *xfpustate, size_t xfpustate_len) { struct savefpu *fpstate; int error; if (mcp->mc_fpformat == _MC_FPFMT_NODEV) return (0); else if (mcp->mc_fpformat != _MC_FPFMT_XMM) return (EINVAL); else if (mcp->mc_ownedfp == _MC_FPOWNED_NONE) { /* We don't care what state is left in the FPU or PCB. */ fpstate_drop(td); error = 0; } else if (mcp->mc_ownedfp == _MC_FPOWNED_FPU || mcp->mc_ownedfp == _MC_FPOWNED_PCB) { fpstate = (struct savefpu *)&mcp->mc_fpstate; fpstate->sv_env.en_mxcsr &= cpu_mxcsr_mask; error = fpusetregs(td, fpstate, xfpustate, xfpustate_len); } else return (EINVAL); return (error); } void fpstate_drop(struct thread *td) { KASSERT(PCB_USER_FPU(td->td_pcb), ("fpstate_drop: kernel-owned fpu")); critical_enter(); if (PCPU_GET(fpcurthread) == td) fpudrop(); /* * XXX force a full drop of the fpu. The above only drops it if we * owned it. * * XXX I don't much like fpugetuserregs()'s semantics of doing a full * drop. Dropping only to the pcb matches fnsave's behaviour. * We only need to drop to !PCB_INITDONE in sendsig(). But * sendsig() is the only caller of fpugetuserregs()... perhaps we just * have too many layers. */ clear_pcb_flags(curthread->td_pcb, PCB_FPUINITDONE | PCB_USERFPUINITDONE); critical_exit(); } int fill_dbregs(struct thread *td, struct dbreg *dbregs) { struct pcb *pcb; if (td == NULL) { dbregs->dr[0] = rdr0(); dbregs->dr[1] = rdr1(); dbregs->dr[2] = rdr2(); dbregs->dr[3] = rdr3(); dbregs->dr[6] = rdr6(); dbregs->dr[7] = rdr7(); } else { pcb = td->td_pcb; dbregs->dr[0] = pcb->pcb_dr0; dbregs->dr[1] = pcb->pcb_dr1; dbregs->dr[2] = pcb->pcb_dr2; dbregs->dr[3] = pcb->pcb_dr3; dbregs->dr[6] = pcb->pcb_dr6; dbregs->dr[7] = pcb->pcb_dr7; } dbregs->dr[4] = 0; dbregs->dr[5] = 0; dbregs->dr[8] = 0; dbregs->dr[9] = 0; dbregs->dr[10] = 0; dbregs->dr[11] = 0; dbregs->dr[12] = 0; dbregs->dr[13] = 0; dbregs->dr[14] = 0; dbregs->dr[15] = 0; return (0); } int set_dbregs(struct thread *td, struct dbreg *dbregs) { struct pcb *pcb; int i; if (td == NULL) { load_dr0(dbregs->dr[0]); load_dr1(dbregs->dr[1]); load_dr2(dbregs->dr[2]); load_dr3(dbregs->dr[3]); load_dr6(dbregs->dr[6]); load_dr7(dbregs->dr[7]); } else { /* * Don't let an illegal value for dr7 get set. Specifically, * check for undefined settings. Setting these bit patterns * result in undefined behaviour and can lead to an unexpected * TRCTRAP or a general protection fault right here. * Upper bits of dr6 and dr7 must not be set */ for (i = 0; i < 4; i++) { if (DBREG_DR7_ACCESS(dbregs->dr[7], i) == 0x02) return (EINVAL); if (td->td_frame->tf_cs == _ucode32sel && DBREG_DR7_LEN(dbregs->dr[7], i) == DBREG_DR7_LEN_8) return (EINVAL); } if ((dbregs->dr[6] & 0xffffffff00000000ul) != 0 || (dbregs->dr[7] & 0xffffffff00000000ul) != 0) return (EINVAL); pcb = td->td_pcb; /* * Don't let a process set a breakpoint that is not within the * process's address space. If a process could do this, it * could halt the system by setting a breakpoint in the kernel * (if ddb was enabled). Thus, we need to check to make sure * that no breakpoints are being enabled for addresses outside * process's address space. * * XXX - what about when the watched area of the user's * address space is written into from within the kernel * ... wouldn't that still cause a breakpoint to be generated * from within kernel mode? */ if (DBREG_DR7_ENABLED(dbregs->dr[7], 0)) { /* dr0 is enabled */ if (dbregs->dr[0] >= VM_MAXUSER_ADDRESS) return (EINVAL); } if (DBREG_DR7_ENABLED(dbregs->dr[7], 1)) { /* dr1 is enabled */ if (dbregs->dr[1] >= VM_MAXUSER_ADDRESS) return (EINVAL); } if (DBREG_DR7_ENABLED(dbregs->dr[7], 2)) { /* dr2 is enabled */ if (dbregs->dr[2] >= VM_MAXUSER_ADDRESS) return (EINVAL); } if (DBREG_DR7_ENABLED(dbregs->dr[7], 3)) { /* dr3 is enabled */ if (dbregs->dr[3] >= VM_MAXUSER_ADDRESS) return (EINVAL); } pcb->pcb_dr0 = dbregs->dr[0]; pcb->pcb_dr1 = dbregs->dr[1]; pcb->pcb_dr2 = dbregs->dr[2]; pcb->pcb_dr3 = dbregs->dr[3]; pcb->pcb_dr6 = dbregs->dr[6]; pcb->pcb_dr7 = dbregs->dr[7]; set_pcb_flags(pcb, PCB_DBREGS); } return (0); } void reset_dbregs(void) { load_dr7(0); /* Turn off the control bits first */ load_dr0(0); load_dr1(0); load_dr2(0); load_dr3(0); load_dr6(0); } /* * Return > 0 if a hardware breakpoint has been hit, and the * breakpoint was in user space. Return 0, otherwise. */ int user_dbreg_trap(void) { u_int64_t dr7, dr6; /* debug registers dr6 and dr7 */ u_int64_t bp; /* breakpoint bits extracted from dr6 */ int nbp; /* number of breakpoints that triggered */ caddr_t addr[4]; /* breakpoint addresses */ int i; dr7 = rdr7(); if ((dr7 & 0x000000ff) == 0) { /* * all GE and LE bits in the dr7 register are zero, * thus the trap couldn't have been caused by the * hardware debug registers */ return 0; } nbp = 0; dr6 = rdr6(); bp = dr6 & 0x0000000f; if (!bp) { /* * None of the breakpoint bits are set meaning this * trap was not caused by any of the debug registers */ return 0; } /* * at least one of the breakpoints were hit, check to see * which ones and if any of them are user space addresses */ if (bp & 0x01) { addr[nbp++] = (caddr_t)rdr0(); } if (bp & 0x02) { addr[nbp++] = (caddr_t)rdr1(); } if (bp & 0x04) { addr[nbp++] = (caddr_t)rdr2(); } if (bp & 0x08) { addr[nbp++] = (caddr_t)rdr3(); } for (i = 0; i < nbp; i++) { if (addr[i] < (caddr_t)VM_MAXUSER_ADDRESS) { /* * addr[i] is in user space */ return nbp; } } /* * None of the breakpoints are in user space. */ return 0; } /* * The pcb_flags is only modified by current thread, or by other threads * when current thread is stopped. However, current thread may change it * from the interrupt context in cpu_switch(), or in the trap handler. * When we read-modify-write pcb_flags from C sources, compiler may generate * code that is not atomic regarding the interrupt handler. If a trap or * interrupt happens and any flag is modified from the handler, it can be * clobbered with the cached value later. Therefore, we implement setting * and clearing flags with single-instruction functions, which do not race * with possible modification of the flags from the trap or interrupt context, * because traps and interrupts are executed only on instruction boundary. */ void set_pcb_flags_raw(struct pcb *pcb, const u_int flags) { __asm __volatile("orl %1,%0" : "=m" (pcb->pcb_flags) : "ir" (flags), "m" (pcb->pcb_flags) : "cc", "memory"); } /* * The support for RDFSBASE, WRFSBASE and similar instructions for %gs * base requires that kernel saves MSR_FSBASE and MSR_{K,}GSBASE into * pcb if user space modified the bases. We must save on the context * switch or if the return to usermode happens through the doreti. * * Tracking of both events is performed by the pcb flag PCB_FULL_IRET, * which have a consequence that the base MSRs must be saved each time * the PCB_FULL_IRET flag is set. We disable interrupts to sync with * context switches. */ void set_pcb_flags(struct pcb *pcb, const u_int flags) { register_t r; if (curpcb == pcb && (flags & PCB_FULL_IRET) != 0 && (pcb->pcb_flags & PCB_FULL_IRET) == 0 && (cpu_stdext_feature & CPUID_STDEXT_FSGSBASE) != 0) { r = intr_disable(); if ((pcb->pcb_flags & PCB_FULL_IRET) == 0) { if (rfs() == _ufssel) pcb->pcb_fsbase = rdfsbase(); if (rgs() == _ugssel) pcb->pcb_gsbase = rdmsr(MSR_KGSBASE); } set_pcb_flags_raw(pcb, flags); intr_restore(r); } else { set_pcb_flags_raw(pcb, flags); } } void clear_pcb_flags(struct pcb *pcb, const u_int flags) { __asm __volatile("andl %1,%0" : "=m" (pcb->pcb_flags) : "ir" (~flags), "m" (pcb->pcb_flags) : "cc", "memory"); } #ifdef KDB /* * Provide inb() and outb() as functions. They are normally only available as * inline functions, thus cannot be called from the debugger. */ /* silence compiler warnings */ u_char inb_(u_short); void outb_(u_short, u_char); u_char inb_(u_short port) { return inb(port); } void outb_(u_short port, u_char data) { outb(port, data); } #endif /* KDB */ Index: head/sys/amd64/amd64/sys_machdep.c =================================================================== --- head/sys/amd64/amd64/sys_machdep.c (revision 324784) +++ head/sys/amd64/amd64/sys_machdep.c (revision 324785) @@ -1,746 +1,746 @@ /*- * Copyright (c) 2003 Peter Wemm. * Copyright (c) 1990 The Regents of the University of California. * All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * 3. Neither the name of the University nor the names of its contributors * may be used to endorse or promote products derived from this software * without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * SUCH DAMAGE. * * from: @(#)sys_machdep.c 5.5 (Berkeley) 1/19/91 */ #include __FBSDID("$FreeBSD$"); #include "opt_capsicum.h" #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include /* for kernel_map */ #include #include #include #include #include #include #include #include #include #define MAX_LD 8192 int max_ldt_segment = 512; SYSCTL_INT(_machdep, OID_AUTO, max_ldt_segment, CTLFLAG_RDTUN, &max_ldt_segment, 0, "Maximum number of allowed LDT segments in the single address space"); static void max_ldt_segment_init(void *arg __unused) { if (max_ldt_segment <= 0) max_ldt_segment = 1; if (max_ldt_segment > MAX_LD) max_ldt_segment = MAX_LD; } SYSINIT(maxldt, SI_SUB_VM_CONF, SI_ORDER_ANY, max_ldt_segment_init, NULL); static void user_ldt_derefl(struct proc_ldt *pldt); #ifndef _SYS_SYSPROTO_H_ struct sysarch_args { int op; char *parms; }; #endif int sysarch_ldt(struct thread *td, struct sysarch_args *uap, int uap_space) { struct i386_ldt_args *largs, la; struct user_segment_descriptor *lp; int error = 0; /* * XXXKIB check that the BSM generation code knows to encode * the op argument. */ AUDIT_ARG_CMD(uap->op); if (uap_space == UIO_USERSPACE) { error = copyin(uap->parms, &la, sizeof(struct i386_ldt_args)); if (error != 0) return (error); largs = &la; } else largs = (struct i386_ldt_args *)uap->parms; switch (uap->op) { case I386_GET_LDT: error = amd64_get_ldt(td, largs); break; case I386_SET_LDT: if (largs->descs != NULL && largs->num > max_ldt_segment) return (EINVAL); set_pcb_flags(td->td_pcb, PCB_FULL_IRET); if (largs->descs != NULL) { lp = malloc(largs->num * sizeof(struct user_segment_descriptor), M_TEMP, M_WAITOK); error = copyin(largs->descs, lp, largs->num * sizeof(struct user_segment_descriptor)); if (error == 0) error = amd64_set_ldt(td, largs, lp); free(lp, M_TEMP); } else { error = amd64_set_ldt(td, largs, NULL); } break; } return (error); } void update_gdt_gsbase(struct thread *td, uint32_t base) { struct user_segment_descriptor *sd; if (td != curthread) return; set_pcb_flags(td->td_pcb, PCB_FULL_IRET); critical_enter(); sd = PCPU_GET(gs32p); sd->sd_lobase = base & 0xffffff; sd->sd_hibase = (base >> 24) & 0xff; critical_exit(); } void update_gdt_fsbase(struct thread *td, uint32_t base) { struct user_segment_descriptor *sd; if (td != curthread) return; set_pcb_flags(td->td_pcb, PCB_FULL_IRET); critical_enter(); sd = PCPU_GET(fs32p); sd->sd_lobase = base & 0xffffff; sd->sd_hibase = (base >> 24) & 0xff; critical_exit(); } int sysarch(struct thread *td, struct sysarch_args *uap) { int error = 0; struct pcb *pcb = curthread->td_pcb; uint32_t i386base; uint64_t a64base; struct i386_ioperm_args iargs; struct i386_get_xfpustate i386xfpu; struct amd64_get_xfpustate a64xfpu; #ifdef CAPABILITY_MODE /* * When adding new operations, add a new case statement here to * explicitly indicate whether or not the operation is safe to * perform in capability mode. */ if (IN_CAPABILITY_MODE(td)) { switch (uap->op) { case I386_GET_LDT: case I386_SET_LDT: case I386_GET_IOPERM: case I386_GET_FSBASE: case I386_SET_FSBASE: case I386_GET_GSBASE: case I386_SET_GSBASE: case I386_GET_XFPUSTATE: case AMD64_GET_FSBASE: case AMD64_SET_FSBASE: case AMD64_GET_GSBASE: case AMD64_SET_GSBASE: case AMD64_GET_XFPUSTATE: break; case I386_SET_IOPERM: default: #ifdef KTRACE if (KTRPOINT(td, KTR_CAPFAIL)) ktrcapfail(CAPFAIL_SYSCALL, NULL, NULL); #endif return (ECAPMODE); } } #endif if (uap->op == I386_GET_LDT || uap->op == I386_SET_LDT) return (sysarch_ldt(td, uap, UIO_USERSPACE)); /* * XXXKIB check that the BSM generation code knows to encode * the op argument. */ AUDIT_ARG_CMD(uap->op); switch (uap->op) { case I386_GET_IOPERM: case I386_SET_IOPERM: if ((error = copyin(uap->parms, &iargs, sizeof(struct i386_ioperm_args))) != 0) return (error); break; case I386_GET_XFPUSTATE: if ((error = copyin(uap->parms, &i386xfpu, sizeof(struct i386_get_xfpustate))) != 0) return (error); a64xfpu.addr = (void *)(uintptr_t)i386xfpu.addr; a64xfpu.len = i386xfpu.len; break; case AMD64_GET_XFPUSTATE: if ((error = copyin(uap->parms, &a64xfpu, sizeof(struct amd64_get_xfpustate))) != 0) return (error); break; default: break; } switch (uap->op) { case I386_GET_IOPERM: error = amd64_get_ioperm(td, &iargs); if (error == 0) error = copyout(&iargs, uap->parms, sizeof(struct i386_ioperm_args)); break; case I386_SET_IOPERM: error = amd64_set_ioperm(td, &iargs); break; case I386_GET_FSBASE: update_pcb_bases(pcb); i386base = pcb->pcb_fsbase; error = copyout(&i386base, uap->parms, sizeof(i386base)); break; case I386_SET_FSBASE: error = copyin(uap->parms, &i386base, sizeof(i386base)); if (!error) { set_pcb_flags(pcb, PCB_FULL_IRET); pcb->pcb_fsbase = i386base; td->td_frame->tf_fs = _ufssel; update_gdt_fsbase(td, i386base); } break; case I386_GET_GSBASE: update_pcb_bases(pcb); i386base = pcb->pcb_gsbase; error = copyout(&i386base, uap->parms, sizeof(i386base)); break; case I386_SET_GSBASE: error = copyin(uap->parms, &i386base, sizeof(i386base)); if (!error) { set_pcb_flags(pcb, PCB_FULL_IRET); pcb->pcb_gsbase = i386base; td->td_frame->tf_gs = _ugssel; update_gdt_gsbase(td, i386base); } break; case AMD64_GET_FSBASE: update_pcb_bases(pcb); error = copyout(&pcb->pcb_fsbase, uap->parms, sizeof(pcb->pcb_fsbase)); break; case AMD64_SET_FSBASE: error = copyin(uap->parms, &a64base, sizeof(a64base)); if (!error) { if (a64base < VM_MAXUSER_ADDRESS) { set_pcb_flags(pcb, PCB_FULL_IRET); pcb->pcb_fsbase = a64base; td->td_frame->tf_fs = _ufssel; } else error = EINVAL; } break; case AMD64_GET_GSBASE: update_pcb_bases(pcb); error = copyout(&pcb->pcb_gsbase, uap->parms, sizeof(pcb->pcb_gsbase)); break; case AMD64_SET_GSBASE: error = copyin(uap->parms, &a64base, sizeof(a64base)); if (!error) { if (a64base < VM_MAXUSER_ADDRESS) { set_pcb_flags(pcb, PCB_FULL_IRET); pcb->pcb_gsbase = a64base; td->td_frame->tf_gs = _ugssel; } else error = EINVAL; } break; case I386_GET_XFPUSTATE: case AMD64_GET_XFPUSTATE: if (a64xfpu.len > cpu_max_ext_state_size - sizeof(struct savefpu)) return (EINVAL); fpugetregs(td); error = copyout((char *)(get_pcb_user_save_td(td) + 1), a64xfpu.addr, a64xfpu.len); break; default: error = EINVAL; break; } return (error); } int amd64_set_ioperm(td, uap) struct thread *td; struct i386_ioperm_args *uap; { char *iomap; struct amd64tss *tssp; struct system_segment_descriptor *tss_sd; struct pcb *pcb; u_int i; int error; if ((error = priv_check(td, PRIV_IO)) != 0) return (error); if ((error = securelevel_gt(td->td_ucred, 0)) != 0) return (error); if (uap->start > uap->start + uap->length || uap->start + uap->length > IOPAGES * PAGE_SIZE * NBBY) return (EINVAL); /* * XXX * While this is restricted to root, we should probably figure out * whether any other driver is using this i/o address, as so not to * cause confusion. This probably requires a global 'usage registry'. */ pcb = td->td_pcb; if (pcb->pcb_tssp == NULL) { tssp = (struct amd64tss *)kmem_malloc(kernel_arena, ctob(IOPAGES+1), M_WAITOK); iomap = (char *)&tssp[1]; memset(iomap, 0xff, IOPERM_BITMAP_SIZE); critical_enter(); /* Takes care of tss_rsp0. */ memcpy(tssp, &common_tss[PCPU_GET(cpuid)], sizeof(struct amd64tss)); tssp->tss_iobase = sizeof(*tssp); pcb->pcb_tssp = tssp; tss_sd = PCPU_GET(tss); tss_sd->sd_lobase = (u_long)tssp & 0xffffff; tss_sd->sd_hibase = ((u_long)tssp >> 24) & 0xfffffffffful; tss_sd->sd_type = SDT_SYSTSS; ltr(GSEL(GPROC0_SEL, SEL_KPL)); PCPU_SET(tssp, tssp); critical_exit(); } else iomap = (char *)&pcb->pcb_tssp[1]; for (i = uap->start; i < uap->start + uap->length; i++) { if (uap->enable) iomap[i >> 3] &= ~(1 << (i & 7)); else iomap[i >> 3] |= (1 << (i & 7)); } return (error); } int amd64_get_ioperm(td, uap) struct thread *td; struct i386_ioperm_args *uap; { int i, state; char *iomap; if (uap->start >= IOPAGES * PAGE_SIZE * NBBY) return (EINVAL); if (td->td_pcb->pcb_tssp == NULL) { uap->length = 0; goto done; } iomap = (char *)&td->td_pcb->pcb_tssp[1]; i = uap->start; state = (iomap[i >> 3] >> (i & 7)) & 1; uap->enable = !state; uap->length = 1; for (i = uap->start + 1; i < IOPAGES * PAGE_SIZE * NBBY; i++) { if (state != ((iomap[i >> 3] >> (i & 7)) & 1)) break; uap->length++; } done: return (0); } /* * Update the GDT entry pointing to the LDT to point to the LDT of the * current process. */ static void set_user_ldt(struct mdproc *mdp) { *PCPU_GET(ldt) = mdp->md_ldt_sd; lldt(GSEL(GUSERLDT_SEL, SEL_KPL)); } static void set_user_ldt_rv(struct vmspace *vmsp) { struct thread *td; td = curthread; if (vmsp != td->td_proc->p_vmspace) return; set_user_ldt(&td->td_proc->p_md); } struct proc_ldt * user_ldt_alloc(struct proc *p, int force) { struct proc_ldt *pldt, *new_ldt; struct mdproc *mdp; struct soft_segment_descriptor sldt; mtx_assert(&dt_lock, MA_OWNED); mdp = &p->p_md; if (!force && mdp->md_ldt != NULL) return (mdp->md_ldt); mtx_unlock(&dt_lock); new_ldt = malloc(sizeof(struct proc_ldt), M_SUBPROC, M_WAITOK); new_ldt->ldt_base = (caddr_t)kmem_malloc(kernel_arena, max_ldt_segment * sizeof(struct user_segment_descriptor), M_WAITOK | M_ZERO); new_ldt->ldt_refcnt = 1; sldt.ssd_base = (uint64_t)new_ldt->ldt_base; sldt.ssd_limit = max_ldt_segment * sizeof(struct user_segment_descriptor) - 1; sldt.ssd_type = SDT_SYSLDT; sldt.ssd_dpl = SEL_KPL; sldt.ssd_p = 1; sldt.ssd_long = 0; sldt.ssd_def32 = 0; sldt.ssd_gran = 0; mtx_lock(&dt_lock); pldt = mdp->md_ldt; if (pldt != NULL && !force) { kmem_free(kernel_arena, (vm_offset_t)new_ldt->ldt_base, max_ldt_segment * sizeof(struct user_segment_descriptor)); free(new_ldt, M_SUBPROC); return (pldt); } if (pldt != NULL) { bcopy(pldt->ldt_base, new_ldt->ldt_base, max_ldt_segment * sizeof(struct user_segment_descriptor)); user_ldt_derefl(pldt); } critical_enter(); ssdtosyssd(&sldt, &p->p_md.md_ldt_sd); atomic_thread_fence_rel(); mdp->md_ldt = new_ldt; critical_exit(); smp_rendezvous(NULL, (void (*)(void *))set_user_ldt_rv, NULL, p->p_vmspace); return (mdp->md_ldt); } void user_ldt_free(struct thread *td) { struct proc *p = td->td_proc; struct mdproc *mdp = &p->p_md; struct proc_ldt *pldt; - mtx_assert(&dt_lock, MA_OWNED); + mtx_lock(&dt_lock); if ((pldt = mdp->md_ldt) == NULL) { mtx_unlock(&dt_lock); return; } critical_enter(); mdp->md_ldt = NULL; atomic_thread_fence_rel(); bzero(&mdp->md_ldt_sd, sizeof(mdp->md_ldt_sd)); if (td == curthread) lldt(GSEL(GNULL_SEL, SEL_KPL)); critical_exit(); user_ldt_deref(pldt); } static void user_ldt_derefl(struct proc_ldt *pldt) { if (--pldt->ldt_refcnt == 0) { kmem_free(kernel_arena, (vm_offset_t)pldt->ldt_base, max_ldt_segment * sizeof(struct user_segment_descriptor)); free(pldt, M_SUBPROC); } } void user_ldt_deref(struct proc_ldt *pldt) { mtx_assert(&dt_lock, MA_OWNED); user_ldt_derefl(pldt); mtx_unlock(&dt_lock); } /* * Note for the authors of compat layers (linux, etc): copyout() in * the function below is not a problem since it presents data in * arch-specific format (i.e. i386-specific in this case), not in * the OS-specific one. */ int amd64_get_ldt(struct thread *td, struct i386_ldt_args *uap) { struct proc_ldt *pldt; struct user_segment_descriptor *lp; uint64_t *data; u_int i, num; int error; #ifdef DEBUG printf("amd64_get_ldt: start=%u num=%u descs=%p\n", uap->start, uap->num, (void *)uap->descs); #endif pldt = td->td_proc->p_md.md_ldt; if (pldt == NULL || uap->start >= max_ldt_segment || uap->num == 0) { td->td_retval[0] = 0; return (0); } num = min(uap->num, max_ldt_segment - uap->start); lp = &((struct user_segment_descriptor *)(pldt->ldt_base))[uap->start]; data = malloc(num * sizeof(struct user_segment_descriptor), M_TEMP, M_WAITOK); mtx_lock(&dt_lock); for (i = 0; i < num; i++) data[i] = ((volatile uint64_t *)lp)[i]; mtx_unlock(&dt_lock); error = copyout(data, uap->descs, num * sizeof(struct user_segment_descriptor)); free(data, M_TEMP); if (error == 0) td->td_retval[0] = num; return (error); } int amd64_set_ldt(struct thread *td, struct i386_ldt_args *uap, struct user_segment_descriptor *descs) { struct mdproc *mdp; struct proc_ldt *pldt; struct user_segment_descriptor *dp; struct proc *p; u_int largest_ld, i; int error; #ifdef DEBUG printf("amd64_set_ldt: start=%u num=%u descs=%p\n", uap->start, uap->num, (void *)uap->descs); #endif mdp = &td->td_proc->p_md; error = 0; set_pcb_flags(td->td_pcb, PCB_FULL_IRET); p = td->td_proc; if (descs == NULL) { /* Free descriptors */ if (uap->start == 0 && uap->num == 0) uap->num = max_ldt_segment; if (uap->num == 0) return (EINVAL); if ((pldt = mdp->md_ldt) == NULL || uap->start >= max_ldt_segment) return (0); largest_ld = uap->start + uap->num; if (largest_ld > max_ldt_segment) largest_ld = max_ldt_segment; if (largest_ld < uap->start) return (EINVAL); mtx_lock(&dt_lock); for (i = uap->start; i < largest_ld; i++) ((volatile uint64_t *)(pldt->ldt_base))[i] = 0; mtx_unlock(&dt_lock); return (0); } if (!(uap->start == LDT_AUTO_ALLOC && uap->num == 1)) { /* verify range of descriptors to modify */ largest_ld = uap->start + uap->num; if (uap->start >= max_ldt_segment || largest_ld > max_ldt_segment || largest_ld < uap->start) return (EINVAL); } /* Check descriptors for access violations */ for (i = 0; i < uap->num; i++) { dp = &descs[i]; switch (dp->sd_type) { case SDT_SYSNULL: /* system null */ dp->sd_p = 0; break; case SDT_SYS286TSS: case SDT_SYSLDT: case SDT_SYS286BSY: case SDT_SYS286CGT: case SDT_SYSTASKGT: case SDT_SYS286IGT: case SDT_SYS286TGT: case SDT_SYSNULL2: case SDT_SYSTSS: case SDT_SYSNULL3: case SDT_SYSBSY: case SDT_SYSCGT: case SDT_SYSNULL4: case SDT_SYSIGT: case SDT_SYSTGT: return (EACCES); /* memory segment types */ case SDT_MEMEC: /* memory execute only conforming */ case SDT_MEMEAC: /* memory execute only accessed conforming */ case SDT_MEMERC: /* memory execute read conforming */ case SDT_MEMERAC: /* memory execute read accessed conforming */ /* Must be "present" if executable and conforming. */ if (dp->sd_p == 0) return (EACCES); break; case SDT_MEMRO: /* memory read only */ case SDT_MEMROA: /* memory read only accessed */ case SDT_MEMRW: /* memory read write */ case SDT_MEMRWA: /* memory read write accessed */ case SDT_MEMROD: /* memory read only expand dwn limit */ case SDT_MEMRODA: /* memory read only expand dwn lim accessed */ case SDT_MEMRWD: /* memory read write expand dwn limit */ case SDT_MEMRWDA: /* memory read write expand dwn lim acessed */ case SDT_MEME: /* memory execute only */ case SDT_MEMEA: /* memory execute only accessed */ case SDT_MEMER: /* memory execute read */ case SDT_MEMERA: /* memory execute read accessed */ break; default: return(EINVAL); } /* Only user (ring-3) descriptors may be present. */ if ((dp->sd_p != 0) && (dp->sd_dpl != SEL_UPL)) return (EACCES); } if (uap->start == LDT_AUTO_ALLOC && uap->num == 1) { /* Allocate a free slot */ mtx_lock(&dt_lock); pldt = user_ldt_alloc(p, 0); if (pldt == NULL) { mtx_unlock(&dt_lock); return (ENOMEM); } /* * start scanning a bit up to leave room for NVidia and * Wine, which still user the "Blat" method of allocation. */ i = 16; dp = &((struct user_segment_descriptor *)(pldt->ldt_base))[i]; for (; i < max_ldt_segment; ++i, ++dp) { if (dp->sd_type == SDT_SYSNULL) break; } if (i >= max_ldt_segment) { mtx_unlock(&dt_lock); return (ENOSPC); } uap->start = i; error = amd64_set_ldt_data(td, i, 1, descs); mtx_unlock(&dt_lock); } else { largest_ld = uap->start + uap->num; if (largest_ld > max_ldt_segment) return (EINVAL); mtx_lock(&dt_lock); if (user_ldt_alloc(p, 0) != NULL) { error = amd64_set_ldt_data(td, uap->start, uap->num, descs); } mtx_unlock(&dt_lock); } if (error == 0) td->td_retval[0] = uap->start; return (error); } int amd64_set_ldt_data(struct thread *td, int start, int num, struct user_segment_descriptor *descs) { struct mdproc *mdp; struct proc_ldt *pldt; volatile uint64_t *dst, *src; int i; mtx_assert(&dt_lock, MA_OWNED); mdp = &td->td_proc->p_md; pldt = mdp->md_ldt; dst = (volatile uint64_t *)(pldt->ldt_base); src = (volatile uint64_t *)descs; for (i = 0; i < num; i++) dst[start + i] = src[i]; return (0); } Index: head/sys/amd64/amd64/vm_machdep.c =================================================================== --- head/sys/amd64/amd64/vm_machdep.c (revision 324784) +++ head/sys/amd64/amd64/vm_machdep.c (revision 324785) @@ -1,716 +1,713 @@ /*- * Copyright (c) 1982, 1986 The Regents of the University of California. * Copyright (c) 1989, 1990 William Jolitz * Copyright (c) 1994 John Dyson * All rights reserved. * * This code is derived from software contributed to Berkeley by * the Systems Programming Group of the University of Utah Computer * Science Department, and William Jolitz. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * 3. All advertising materials mentioning features or use of this software * must display the following acknowledgement: * This product includes software developed by the University of * California, Berkeley and its contributors. * 4. Neither the name of the University nor the names of its contributors * may be used to endorse or promote products derived from this software * without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * SUCH DAMAGE. * * from: @(#)vm_machdep.c 7.3 (Berkeley) 5/13/91 * Utah $Hdr: vm_machdep.c 1.16.1.1 89/06/23$ */ #include __FBSDID("$FreeBSD$"); #include "opt_isa.h" #include "opt_cpu.h" #include "opt_compat.h" #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include static void cpu_reset_real(void); #ifdef SMP static void cpu_reset_proxy(void); static u_int cpu_reset_proxyid; static volatile u_int cpu_reset_proxy_active; #endif _Static_assert(OFFSETOF_CURTHREAD == offsetof(struct pcpu, pc_curthread), "OFFSETOF_CURTHREAD does not correspond with offset of pc_curthread."); _Static_assert(OFFSETOF_CURPCB == offsetof(struct pcpu, pc_curpcb), "OFFSETOF_CURPCB does not correspond with offset of pc_curpcb."); _Static_assert(OFFSETOF_MONITORBUF == offsetof(struct pcpu, pc_monitorbuf), "OFFSETOF_MONINORBUF does not correspond with offset of pc_monitorbuf."); struct savefpu * get_pcb_user_save_td(struct thread *td) { vm_offset_t p; p = td->td_kstack + td->td_kstack_pages * PAGE_SIZE - roundup2(cpu_max_ext_state_size, XSAVE_AREA_ALIGN); KASSERT((p % XSAVE_AREA_ALIGN) == 0, ("Unaligned pcb_user_save area")); return ((struct savefpu *)p); } struct savefpu * get_pcb_user_save_pcb(struct pcb *pcb) { vm_offset_t p; p = (vm_offset_t)(pcb + 1); return ((struct savefpu *)p); } struct pcb * get_pcb_td(struct thread *td) { vm_offset_t p; p = td->td_kstack + td->td_kstack_pages * PAGE_SIZE - roundup2(cpu_max_ext_state_size, XSAVE_AREA_ALIGN) - sizeof(struct pcb); return ((struct pcb *)p); } void * alloc_fpusave(int flags) { void *res; struct savefpu_ymm *sf; res = malloc(cpu_max_ext_state_size, M_DEVBUF, flags); if (use_xsave) { sf = (struct savefpu_ymm *)res; bzero(&sf->sv_xstate.sx_hd, sizeof(sf->sv_xstate.sx_hd)); sf->sv_xstate.sx_hd.xstate_bv = xsave_mask; } return (res); } /* * Finish a fork operation, with process p2 nearly set up. * Copy and update the pcb, set up the stack so that the child * ready to run and return to user mode. */ void cpu_fork(struct thread *td1, struct proc *p2, struct thread *td2, int flags) { struct proc *p1; struct pcb *pcb2; struct mdproc *mdp1, *mdp2; struct proc_ldt *pldt; p1 = td1->td_proc; if ((flags & RFPROC) == 0) { if ((flags & RFMEM) == 0) { /* unshare user LDT */ mdp1 = &p1->p_md; mtx_lock(&dt_lock); if ((pldt = mdp1->md_ldt) != NULL && pldt->ldt_refcnt > 1 && user_ldt_alloc(p1, 1) == NULL) panic("could not copy LDT"); mtx_unlock(&dt_lock); } return; } /* Ensure that td1's pcb is up to date. */ fpuexit(td1); update_pcb_bases(td1->td_pcb); /* Point the pcb to the top of the stack */ pcb2 = get_pcb_td(td2); td2->td_pcb = pcb2; /* Copy td1's pcb */ bcopy(td1->td_pcb, pcb2, sizeof(*pcb2)); /* Properly initialize pcb_save */ pcb2->pcb_save = get_pcb_user_save_pcb(pcb2); bcopy(get_pcb_user_save_td(td1), get_pcb_user_save_pcb(pcb2), cpu_max_ext_state_size); /* Point mdproc and then copy over td1's contents */ mdp2 = &p2->p_md; bcopy(&p1->p_md, mdp2, sizeof(*mdp2)); /* * Create a new fresh stack for the new process. * Copy the trap frame for the return to user mode as if from a * syscall. This copies most of the user mode register values. */ td2->td_frame = (struct trapframe *)td2->td_pcb - 1; bcopy(td1->td_frame, td2->td_frame, sizeof(struct trapframe)); td2->td_frame->tf_rax = 0; /* Child returns zero */ td2->td_frame->tf_rflags &= ~PSL_C; /* success */ td2->td_frame->tf_rdx = 1; /* * If the parent process has the trap bit set (i.e. a debugger had * single stepped the process to the system call), we need to clear * the trap flag from the new frame unless the debugger had set PF_FORK * on the parent. Otherwise, the child will receive a (likely * unexpected) SIGTRAP when it executes the first instruction after * returning to userland. */ if ((p1->p_pfsflags & PF_FORK) == 0) td2->td_frame->tf_rflags &= ~PSL_T; /* * Set registers for trampoline to user mode. Leave space for the * return address on stack. These are the kernel mode register values. */ pcb2->pcb_r12 = (register_t)fork_return; /* fork_trampoline argument */ pcb2->pcb_rbp = 0; pcb2->pcb_rsp = (register_t)td2->td_frame - sizeof(void *); pcb2->pcb_rbx = (register_t)td2; /* fork_trampoline argument */ pcb2->pcb_rip = (register_t)fork_trampoline; /*- * pcb2->pcb_dr*: cloned above. * pcb2->pcb_savefpu: cloned above. * pcb2->pcb_flags: cloned above. * pcb2->pcb_onfault: cloned above (always NULL here?). * pcb2->pcb_[fg]sbase: cloned above */ /* Setup to release spin count in fork_exit(). */ td2->td_md.md_spinlock_count = 1; td2->td_md.md_saved_flags = PSL_KERNEL | PSL_I; td2->td_md.md_invl_gen.gen = 0; /* As an i386, do not copy io permission bitmap. */ pcb2->pcb_tssp = NULL; /* New segment registers. */ set_pcb_flags_raw(pcb2, PCB_FULL_IRET); /* Copy the LDT, if necessary. */ mdp1 = &td1->td_proc->p_md; mdp2 = &p2->p_md; mtx_lock(&dt_lock); if (mdp1->md_ldt != NULL) { if (flags & RFMEM) { mdp1->md_ldt->ldt_refcnt++; mdp2->md_ldt = mdp1->md_ldt; bcopy(&mdp1->md_ldt_sd, &mdp2->md_ldt_sd, sizeof(struct system_segment_descriptor)); } else { mdp2->md_ldt = NULL; mdp2->md_ldt = user_ldt_alloc(p2, 0); if (mdp2->md_ldt == NULL) panic("could not copy LDT"); amd64_set_ldt_data(td2, 0, max_ldt_segment, (struct user_segment_descriptor *) mdp1->md_ldt->ldt_base); } } else mdp2->md_ldt = NULL; mtx_unlock(&dt_lock); /* * Now, cpu_switch() can schedule the new process. * pcb_rsp is loaded pointing to the cpu_switch() stack frame * containing the return address when exiting cpu_switch. * This will normally be to fork_trampoline(), which will have * %ebx loaded with the new proc's pointer. fork_trampoline() * will set up a stack to call fork_return(p, frame); to complete * the return to user-mode. */ } /* * Intercept the return address from a freshly forked process that has NOT * been scheduled yet. * * This is needed to make kernel threads stay in kernel mode. */ void cpu_fork_kthread_handler(struct thread *td, void (*func)(void *), void *arg) { /* * Note that the trap frame follows the args, so the function * is really called like this: func(arg, frame); */ td->td_pcb->pcb_r12 = (long) func; /* function */ td->td_pcb->pcb_rbx = (long) arg; /* first arg */ } void cpu_exit(struct thread *td) { /* * If this process has a custom LDT, release it. */ - mtx_lock(&dt_lock); - if (td->td_proc->p_md.md_ldt != 0) + if (td->td_proc->p_md.md_ldt != NULL) user_ldt_free(td); - else - mtx_unlock(&dt_lock); } void cpu_thread_exit(struct thread *td) { struct pcb *pcb; critical_enter(); if (td == PCPU_GET(fpcurthread)) fpudrop(); critical_exit(); pcb = td->td_pcb; /* Disable any hardware breakpoints. */ if (pcb->pcb_flags & PCB_DBREGS) { reset_dbregs(); clear_pcb_flags(pcb, PCB_DBREGS); } } void cpu_thread_clean(struct thread *td) { struct pcb *pcb; pcb = td->td_pcb; /* * Clean TSS/iomap */ if (pcb->pcb_tssp != NULL) { kmem_free(kernel_arena, (vm_offset_t)pcb->pcb_tssp, ctob(IOPAGES + 1)); pcb->pcb_tssp = NULL; } } void cpu_thread_swapin(struct thread *td) { } void cpu_thread_swapout(struct thread *td) { } void cpu_thread_alloc(struct thread *td) { struct pcb *pcb; struct xstate_hdr *xhdr; td->td_pcb = pcb = get_pcb_td(td); td->td_frame = (struct trapframe *)pcb - 1; pcb->pcb_save = get_pcb_user_save_pcb(pcb); if (use_xsave) { xhdr = (struct xstate_hdr *)(pcb->pcb_save + 1); bzero(xhdr, sizeof(*xhdr)); xhdr->xstate_bv = xsave_mask; } } void cpu_thread_free(struct thread *td) { cpu_thread_clean(td); } void cpu_set_syscall_retval(struct thread *td, int error) { switch (error) { case 0: td->td_frame->tf_rax = td->td_retval[0]; td->td_frame->tf_rdx = td->td_retval[1]; td->td_frame->tf_rflags &= ~PSL_C; break; case ERESTART: /* * Reconstruct pc, we know that 'syscall' is 2 bytes, * lcall $X,y is 7 bytes, int 0x80 is 2 bytes. * We saved this in tf_err. * %r10 (which was holding the value of %rcx) is restored * for the next iteration. * %r10 restore is only required for freebsd/amd64 processes, * but shall be innocent for any ia32 ABI. * * Require full context restore to get the arguments * in the registers reloaded at return to usermode. */ td->td_frame->tf_rip -= td->td_frame->tf_err; td->td_frame->tf_r10 = td->td_frame->tf_rcx; set_pcb_flags(td->td_pcb, PCB_FULL_IRET); break; case EJUSTRETURN: break; default: td->td_frame->tf_rax = SV_ABI_ERRNO(td->td_proc, error); td->td_frame->tf_rflags |= PSL_C; break; } } /* * Initialize machine state, mostly pcb and trap frame for a new * thread, about to return to userspace. Put enough state in the new * thread's PCB to get it to go back to the fork_return(), which * finalizes the thread state and handles peculiarities of the first * return to userspace for the new thread. */ void cpu_copy_thread(struct thread *td, struct thread *td0) { struct pcb *pcb2; /* Point the pcb to the top of the stack. */ pcb2 = td->td_pcb; /* * Copy the upcall pcb. This loads kernel regs. * Those not loaded individually below get their default * values here. */ update_pcb_bases(td0->td_pcb); bcopy(td0->td_pcb, pcb2, sizeof(*pcb2)); clear_pcb_flags(pcb2, PCB_FPUINITDONE | PCB_USERFPUINITDONE | PCB_KERNFPU); pcb2->pcb_save = get_pcb_user_save_pcb(pcb2); bcopy(get_pcb_user_save_td(td0), pcb2->pcb_save, cpu_max_ext_state_size); set_pcb_flags_raw(pcb2, PCB_FULL_IRET); /* * Create a new fresh stack for the new thread. */ bcopy(td0->td_frame, td->td_frame, sizeof(struct trapframe)); /* If the current thread has the trap bit set (i.e. a debugger had * single stepped the process to the system call), we need to clear * the trap flag from the new frame. Otherwise, the new thread will * receive a (likely unexpected) SIGTRAP when it executes the first * instruction after returning to userland. */ td->td_frame->tf_rflags &= ~PSL_T; /* * Set registers for trampoline to user mode. Leave space for the * return address on stack. These are the kernel mode register values. */ pcb2->pcb_r12 = (register_t)fork_return; /* trampoline arg */ pcb2->pcb_rbp = 0; pcb2->pcb_rsp = (register_t)td->td_frame - sizeof(void *); /* trampoline arg */ pcb2->pcb_rbx = (register_t)td; /* trampoline arg */ pcb2->pcb_rip = (register_t)fork_trampoline; /* * If we didn't copy the pcb, we'd need to do the following registers: * pcb2->pcb_dr*: cloned above. * pcb2->pcb_savefpu: cloned above. * pcb2->pcb_onfault: cloned above (always NULL here?). * pcb2->pcb_[fg]sbase: cloned above */ /* Setup to release spin count in fork_exit(). */ td->td_md.md_spinlock_count = 1; td->td_md.md_saved_flags = PSL_KERNEL | PSL_I; } /* * Set that machine state for performing an upcall that starts * the entry function with the given argument. */ void cpu_set_upcall(struct thread *td, void (*entry)(void *), void *arg, stack_t *stack) { /* * Do any extra cleaning that needs to be done. * The thread may have optional components * that are not present in a fresh thread. * This may be a recycled thread so make it look * as though it's newly allocated. */ cpu_thread_clean(td); #ifdef COMPAT_FREEBSD32 if (SV_PROC_FLAG(td->td_proc, SV_ILP32)) { /* * Set the trap frame to point at the beginning of the entry * function. */ td->td_frame->tf_rbp = 0; td->td_frame->tf_rsp = (((uintptr_t)stack->ss_sp + stack->ss_size - 4) & ~0x0f) - 4; td->td_frame->tf_rip = (uintptr_t)entry; /* Pass the argument to the entry point. */ suword32((void *)(td->td_frame->tf_rsp + sizeof(int32_t)), (uint32_t)(uintptr_t)arg); return; } #endif /* * Set the trap frame to point at the beginning of the uts * function. */ td->td_frame->tf_rbp = 0; td->td_frame->tf_rsp = ((register_t)stack->ss_sp + stack->ss_size) & ~0x0f; td->td_frame->tf_rsp -= 8; td->td_frame->tf_rip = (register_t)entry; td->td_frame->tf_ds = _udatasel; td->td_frame->tf_es = _udatasel; td->td_frame->tf_fs = _ufssel; td->td_frame->tf_gs = _ugssel; td->td_frame->tf_flags = TF_HASSEGS; /* Pass the argument to the entry point. */ td->td_frame->tf_rdi = (register_t)arg; } int cpu_set_user_tls(struct thread *td, void *tls_base) { struct pcb *pcb; if ((u_int64_t)tls_base >= VM_MAXUSER_ADDRESS) return (EINVAL); pcb = td->td_pcb; set_pcb_flags(pcb, PCB_FULL_IRET); #ifdef COMPAT_FREEBSD32 if (SV_PROC_FLAG(td->td_proc, SV_ILP32)) { pcb->pcb_gsbase = (register_t)tls_base; return (0); } #endif pcb->pcb_fsbase = (register_t)tls_base; return (0); } #ifdef SMP static void cpu_reset_proxy() { cpuset_t tcrp; cpu_reset_proxy_active = 1; while (cpu_reset_proxy_active == 1) ia32_pause(); /* Wait for other cpu to see that we've started */ CPU_SETOF(cpu_reset_proxyid, &tcrp); stop_cpus(tcrp); printf("cpu_reset_proxy: Stopped CPU %d\n", cpu_reset_proxyid); DELAY(1000000); cpu_reset_real(); } #endif void cpu_reset() { #ifdef SMP cpuset_t map; u_int cnt; if (smp_started) { map = all_cpus; CPU_CLR(PCPU_GET(cpuid), &map); CPU_NAND(&map, &stopped_cpus); if (!CPU_EMPTY(&map)) { printf("cpu_reset: Stopping other CPUs\n"); stop_cpus(map); } if (PCPU_GET(cpuid) != 0) { cpu_reset_proxyid = PCPU_GET(cpuid); cpustop_restartfunc = cpu_reset_proxy; cpu_reset_proxy_active = 0; printf("cpu_reset: Restarting BSP\n"); /* Restart CPU #0. */ CPU_SETOF(0, &started_cpus); wmb(); cnt = 0; while (cpu_reset_proxy_active == 0 && cnt < 10000000) { ia32_pause(); cnt++; /* Wait for BSP to announce restart */ } if (cpu_reset_proxy_active == 0) printf("cpu_reset: Failed to restart BSP\n"); enable_intr(); cpu_reset_proxy_active = 2; while (1) ia32_pause(); /* NOTREACHED */ } DELAY(1000000); } #endif cpu_reset_real(); /* NOTREACHED */ } static void cpu_reset_real() { struct region_descriptor null_idt; int b; disable_intr(); /* * Attempt to do a CPU reset via the keyboard controller, * do not turn off GateA20, as any machine that fails * to do the reset here would then end up in no man's land. */ outb(IO_KBD + 4, 0xFE); DELAY(500000); /* wait 0.5 sec to see if that did it */ /* * Attempt to force a reset via the Reset Control register at * I/O port 0xcf9. Bit 2 forces a system reset when it * transitions from 0 to 1. Bit 1 selects the type of reset * to attempt: 0 selects a "soft" reset, and 1 selects a * "hard" reset. We try a "hard" reset. The first write sets * bit 1 to select a "hard" reset and clears bit 2. The * second write forces a 0 -> 1 transition in bit 2 to trigger * a reset. */ outb(0xcf9, 0x2); outb(0xcf9, 0x6); DELAY(500000); /* wait 0.5 sec to see if that did it */ /* * Attempt to force a reset via the Fast A20 and Init register * at I/O port 0x92. Bit 1 serves as an alternate A20 gate. * Bit 0 asserts INIT# when set to 1. We are careful to only * preserve bit 1 while setting bit 0. We also must clear bit * 0 before setting it if it isn't already clear. */ b = inb(0x92); if (b != 0xff) { if ((b & 0x1) != 0) outb(0x92, b & 0xfe); outb(0x92, b | 0x1); DELAY(500000); /* wait 0.5 sec to see if that did it */ } printf("No known reset method worked, attempting CPU shutdown\n"); DELAY(1000000); /* wait 1 sec for printf to complete */ /* Wipe the IDT. */ null_idt.rd_limit = 0; null_idt.rd_base = 0; lidt(&null_idt); /* "good night, sweet prince .... " */ breakpoint(); /* NOTREACHED */ while(1); } /* * Software interrupt handler for queued VM system processing. */ void swi_vm(void *dummy) { if (busdma_swi_pending != 0) busdma_swi(); } /* * Tell whether this address is in some physical memory region. * Currently used by the kernel coredump code in order to avoid * dumping the ``ISA memory hole'' which could cause indefinite hangs, * or other unpredictable behaviour. */ int is_physical_memory(vm_paddr_t addr) { #ifdef DEV_ISA /* The ISA ``memory hole''. */ if (addr >= 0xa0000 && addr < 0x100000) return 0; #endif /* * stuff other tests for known memory-mapped devices (PCI?) * here */ return 1; } Index: head/sys/amd64/ia32/ia32_signal.c =================================================================== --- head/sys/amd64/ia32/ia32_signal.c (revision 324784) +++ head/sys/amd64/ia32/ia32_signal.c (revision 324785) @@ -1,972 +1,969 @@ /*- * Copyright (c) 2003 Peter Wemm * Copyright (c) 1982, 1987, 1990 The Regents of the University of California. * All rights reserved. * * This code is derived from software contributed to Berkeley by * William Jolitz. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * 3. Neither the name of the University nor the names of its contributors * may be used to endorse or promote products derived from this software * without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * SUCH DAMAGE. */ #include __FBSDID("$FreeBSD$"); #include "opt_compat.h" #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #ifdef COMPAT_FREEBSD4 static void freebsd4_ia32_sendsig(sig_t, ksiginfo_t *, sigset_t *); #endif #define CS_SECURE(cs) (ISPL(cs) == SEL_UPL) #define EFL_SECURE(ef, oef) ((((ef) ^ (oef)) & ~PSL_USERCHANGE) == 0) static void ia32_get_fpcontext(struct thread *td, struct ia32_mcontext *mcp, char *xfpusave, size_t xfpusave_len) { size_t max_len, len; /* * XXX Format of 64bit and 32bit FXSAVE areas differs. FXSAVE * in 32bit mode saves %cs and %ds, while on 64bit it saves * 64bit instruction and data pointers. Ignore the difference * for now, it should be irrelevant for most applications. */ mcp->mc_ownedfp = fpugetregs(td); bcopy(get_pcb_user_save_td(td), &mcp->mc_fpstate[0], sizeof(mcp->mc_fpstate)); mcp->mc_fpformat = fpuformat(); if (!use_xsave || xfpusave_len == 0) return; max_len = cpu_max_ext_state_size - sizeof(struct savefpu); len = xfpusave_len; if (len > max_len) { len = max_len; bzero(xfpusave + max_len, len - max_len); } mcp->mc_flags |= _MC_IA32_HASFPXSTATE; mcp->mc_xfpustate_len = len; bcopy(get_pcb_user_save_td(td) + 1, xfpusave, len); } static int ia32_set_fpcontext(struct thread *td, struct ia32_mcontext *mcp, char *xfpustate, size_t xfpustate_len) { int error; if (mcp->mc_fpformat == _MC_FPFMT_NODEV) return (0); else if (mcp->mc_fpformat != _MC_FPFMT_XMM) return (EINVAL); else if (mcp->mc_ownedfp == _MC_FPOWNED_NONE) { /* We don't care what state is left in the FPU or PCB. */ fpstate_drop(td); error = 0; } else if (mcp->mc_ownedfp == _MC_FPOWNED_FPU || mcp->mc_ownedfp == _MC_FPOWNED_PCB) { error = fpusetregs(td, (struct savefpu *)&mcp->mc_fpstate, xfpustate, xfpustate_len); } else return (EINVAL); return (error); } /* * Get machine context. */ static int ia32_get_mcontext(struct thread *td, struct ia32_mcontext *mcp, int flags) { struct pcb *pcb; struct trapframe *tp; pcb = td->td_pcb; tp = td->td_frame; PROC_LOCK(curthread->td_proc); mcp->mc_onstack = sigonstack(tp->tf_rsp); PROC_UNLOCK(curthread->td_proc); /* Entry into kernel always sets TF_HASSEGS */ mcp->mc_gs = tp->tf_gs; mcp->mc_fs = tp->tf_fs; mcp->mc_es = tp->tf_es; mcp->mc_ds = tp->tf_ds; mcp->mc_edi = tp->tf_rdi; mcp->mc_esi = tp->tf_rsi; mcp->mc_ebp = tp->tf_rbp; mcp->mc_isp = tp->tf_rsp; mcp->mc_eflags = tp->tf_rflags; if (flags & GET_MC_CLEAR_RET) { mcp->mc_eax = 0; mcp->mc_edx = 0; mcp->mc_eflags &= ~PSL_C; } else { mcp->mc_eax = tp->tf_rax; mcp->mc_edx = tp->tf_rdx; } mcp->mc_ebx = tp->tf_rbx; mcp->mc_ecx = tp->tf_rcx; mcp->mc_eip = tp->tf_rip; mcp->mc_cs = tp->tf_cs; mcp->mc_esp = tp->tf_rsp; mcp->mc_ss = tp->tf_ss; mcp->mc_len = sizeof(*mcp); mcp->mc_flags = tp->tf_flags; ia32_get_fpcontext(td, mcp, NULL, 0); mcp->mc_fsbase = pcb->pcb_fsbase; mcp->mc_gsbase = pcb->pcb_gsbase; mcp->mc_xfpustate = 0; mcp->mc_xfpustate_len = 0; bzero(mcp->mc_spare2, sizeof(mcp->mc_spare2)); return (0); } /* * Set machine context. * * However, we don't set any but the user modifiable flags, and we won't * touch the cs selector. */ static int ia32_set_mcontext(struct thread *td, struct ia32_mcontext *mcp) { struct trapframe *tp; char *xfpustate; long rflags; int ret; tp = td->td_frame; if (mcp->mc_len != sizeof(*mcp)) return (EINVAL); rflags = (mcp->mc_eflags & PSL_USERCHANGE) | (tp->tf_rflags & ~PSL_USERCHANGE); if (mcp->mc_flags & _MC_IA32_HASFPXSTATE) { if (mcp->mc_xfpustate_len > cpu_max_ext_state_size - sizeof(struct savefpu)) return (EINVAL); xfpustate = __builtin_alloca(mcp->mc_xfpustate_len); ret = copyin(PTRIN(mcp->mc_xfpustate), xfpustate, mcp->mc_xfpustate_len); if (ret != 0) return (ret); } else xfpustate = NULL; ret = ia32_set_fpcontext(td, mcp, xfpustate, mcp->mc_xfpustate_len); if (ret != 0) return (ret); tp->tf_gs = mcp->mc_gs; tp->tf_fs = mcp->mc_fs; tp->tf_es = mcp->mc_es; tp->tf_ds = mcp->mc_ds; tp->tf_flags = TF_HASSEGS; tp->tf_rdi = mcp->mc_edi; tp->tf_rsi = mcp->mc_esi; tp->tf_rbp = mcp->mc_ebp; tp->tf_rbx = mcp->mc_ebx; tp->tf_rdx = mcp->mc_edx; tp->tf_rcx = mcp->mc_ecx; tp->tf_rax = mcp->mc_eax; /* trapno, err */ tp->tf_rip = mcp->mc_eip; tp->tf_rflags = rflags; tp->tf_rsp = mcp->mc_esp; tp->tf_ss = mcp->mc_ss; set_pcb_flags(td->td_pcb, PCB_FULL_IRET); return (0); } /* * The first two fields of a ucontext_t are the signal mask and * the machine context. The next field is uc_link; we want to * avoid destroying the link when copying out contexts. */ #define UC_COPY_SIZE offsetof(struct ia32_ucontext, uc_link) int freebsd32_getcontext(struct thread *td, struct freebsd32_getcontext_args *uap) { struct ia32_ucontext uc; int ret; if (uap->ucp == NULL) ret = EINVAL; else { ia32_get_mcontext(td, &uc.uc_mcontext, GET_MC_CLEAR_RET); PROC_LOCK(td->td_proc); uc.uc_sigmask = td->td_sigmask; PROC_UNLOCK(td->td_proc); bzero(&uc.__spare__, sizeof(uc.__spare__)); ret = copyout(&uc, uap->ucp, UC_COPY_SIZE); } return (ret); } int freebsd32_setcontext(struct thread *td, struct freebsd32_setcontext_args *uap) { struct ia32_ucontext uc; int ret; if (uap->ucp == NULL) ret = EINVAL; else { ret = copyin(uap->ucp, &uc, UC_COPY_SIZE); if (ret == 0) { ret = ia32_set_mcontext(td, &uc.uc_mcontext); if (ret == 0) { kern_sigprocmask(td, SIG_SETMASK, &uc.uc_sigmask, NULL, 0); } } } return (ret == 0 ? EJUSTRETURN : ret); } int freebsd32_swapcontext(struct thread *td, struct freebsd32_swapcontext_args *uap) { struct ia32_ucontext uc; int ret; if (uap->oucp == NULL || uap->ucp == NULL) ret = EINVAL; else { ia32_get_mcontext(td, &uc.uc_mcontext, GET_MC_CLEAR_RET); PROC_LOCK(td->td_proc); uc.uc_sigmask = td->td_sigmask; PROC_UNLOCK(td->td_proc); ret = copyout(&uc, uap->oucp, UC_COPY_SIZE); if (ret == 0) { ret = copyin(uap->ucp, &uc, UC_COPY_SIZE); if (ret == 0) { ret = ia32_set_mcontext(td, &uc.uc_mcontext); if (ret == 0) { kern_sigprocmask(td, SIG_SETMASK, &uc.uc_sigmask, NULL, 0); } } } } return (ret == 0 ? EJUSTRETURN : ret); } /* * Send an interrupt to process. * * Stack is set up to allow sigcode stored * at top to call routine, followed by kcall * to sigreturn routine below. After sigreturn * resets the signal mask, the stack, and the * frame pointer, it returns to the user * specified pc, psl. */ #ifdef COMPAT_43 static void ia32_osendsig(sig_t catcher, ksiginfo_t *ksi, sigset_t *mask) { struct ia32_sigframe3 sf, *fp; struct proc *p; struct thread *td; struct sigacts *psp; struct trapframe *regs; int sig; int oonstack; td = curthread; p = td->td_proc; PROC_LOCK_ASSERT(p, MA_OWNED); sig = ksi->ksi_signo; psp = p->p_sigacts; mtx_assert(&psp->ps_mtx, MA_OWNED); regs = td->td_frame; oonstack = sigonstack(regs->tf_rsp); /* Allocate space for the signal handler context. */ if ((td->td_pflags & TDP_ALTSTACK) && !oonstack && SIGISMEMBER(psp->ps_sigonstack, sig)) { fp = (struct ia32_sigframe3 *)((uintptr_t)td->td_sigstk.ss_sp + td->td_sigstk.ss_size - sizeof(sf)); td->td_sigstk.ss_flags |= SS_ONSTACK; } else fp = (struct ia32_sigframe3 *)regs->tf_rsp - 1; /* Build the argument list for the signal handler. */ sf.sf_signum = sig; sf.sf_scp = (register_t)&fp->sf_siginfo.si_sc; if (SIGISMEMBER(psp->ps_siginfo, sig)) { /* Signal handler installed with SA_SIGINFO. */ sf.sf_arg2 = (register_t)&fp->sf_siginfo; sf.sf_siginfo.si_signo = sig; sf.sf_siginfo.si_code = ksi->ksi_code; sf.sf_ah = (uintptr_t)catcher; } else { /* Old FreeBSD-style arguments. */ sf.sf_arg2 = ksi->ksi_code; sf.sf_addr = (register_t)ksi->ksi_addr; sf.sf_ah = (uintptr_t)catcher; } mtx_unlock(&psp->ps_mtx); PROC_UNLOCK(p); /* Save most if not all of trap frame. */ sf.sf_siginfo.si_sc.sc_eax = regs->tf_rax; sf.sf_siginfo.si_sc.sc_ebx = regs->tf_rbx; sf.sf_siginfo.si_sc.sc_ecx = regs->tf_rcx; sf.sf_siginfo.si_sc.sc_edx = regs->tf_rdx; sf.sf_siginfo.si_sc.sc_esi = regs->tf_rsi; sf.sf_siginfo.si_sc.sc_edi = regs->tf_rdi; sf.sf_siginfo.si_sc.sc_cs = regs->tf_cs; sf.sf_siginfo.si_sc.sc_ds = regs->tf_ds; sf.sf_siginfo.si_sc.sc_ss = regs->tf_ss; sf.sf_siginfo.si_sc.sc_es = regs->tf_es; sf.sf_siginfo.si_sc.sc_fs = regs->tf_fs; sf.sf_siginfo.si_sc.sc_gs = regs->tf_gs; sf.sf_siginfo.si_sc.sc_isp = regs->tf_rsp; /* Build the signal context to be used by osigreturn(). */ sf.sf_siginfo.si_sc.sc_onstack = (oonstack) ? 1 : 0; SIG2OSIG(*mask, sf.sf_siginfo.si_sc.sc_mask); sf.sf_siginfo.si_sc.sc_esp = regs->tf_rsp; sf.sf_siginfo.si_sc.sc_ebp = regs->tf_rbp; sf.sf_siginfo.si_sc.sc_eip = regs->tf_rip; sf.sf_siginfo.si_sc.sc_eflags = regs->tf_rflags; sf.sf_siginfo.si_sc.sc_trapno = regs->tf_trapno; sf.sf_siginfo.si_sc.sc_err = regs->tf_err; /* * Copy the sigframe out to the user's stack. */ if (copyout(&sf, fp, sizeof(*fp)) != 0) { #ifdef DEBUG printf("process %ld has trashed its stack\n", (long)p->p_pid); #endif PROC_LOCK(p); sigexit(td, SIGILL); } regs->tf_rsp = (uintptr_t)fp; regs->tf_rip = p->p_sysent->sv_psstrings - sz_ia32_osigcode; regs->tf_rflags &= ~(PSL_T | PSL_D); regs->tf_cs = _ucode32sel; regs->tf_ds = _udatasel; regs->tf_es = _udatasel; regs->tf_fs = _udatasel; regs->tf_ss = _udatasel; set_pcb_flags(td->td_pcb, PCB_FULL_IRET); PROC_LOCK(p); mtx_lock(&psp->ps_mtx); } #endif #ifdef COMPAT_FREEBSD4 static void freebsd4_ia32_sendsig(sig_t catcher, ksiginfo_t *ksi, sigset_t *mask) { struct ia32_sigframe4 sf, *sfp; struct siginfo32 siginfo; struct proc *p; struct thread *td; struct sigacts *psp; struct trapframe *regs; int oonstack; int sig; td = curthread; p = td->td_proc; siginfo_to_siginfo32(&ksi->ksi_info, &siginfo); PROC_LOCK_ASSERT(p, MA_OWNED); sig = siginfo.si_signo; psp = p->p_sigacts; mtx_assert(&psp->ps_mtx, MA_OWNED); regs = td->td_frame; oonstack = sigonstack(regs->tf_rsp); /* Save user context. */ bzero(&sf, sizeof(sf)); sf.sf_uc.uc_sigmask = *mask; sf.sf_uc.uc_stack.ss_sp = (uintptr_t)td->td_sigstk.ss_sp; sf.sf_uc.uc_stack.ss_size = td->td_sigstk.ss_size; sf.sf_uc.uc_stack.ss_flags = (td->td_pflags & TDP_ALTSTACK) ? ((oonstack) ? SS_ONSTACK : 0) : SS_DISABLE; sf.sf_uc.uc_mcontext.mc_onstack = (oonstack) ? 1 : 0; sf.sf_uc.uc_mcontext.mc_edi = regs->tf_rdi; sf.sf_uc.uc_mcontext.mc_esi = regs->tf_rsi; sf.sf_uc.uc_mcontext.mc_ebp = regs->tf_rbp; sf.sf_uc.uc_mcontext.mc_isp = regs->tf_rsp; /* XXX */ sf.sf_uc.uc_mcontext.mc_ebx = regs->tf_rbx; sf.sf_uc.uc_mcontext.mc_edx = regs->tf_rdx; sf.sf_uc.uc_mcontext.mc_ecx = regs->tf_rcx; sf.sf_uc.uc_mcontext.mc_eax = regs->tf_rax; sf.sf_uc.uc_mcontext.mc_trapno = regs->tf_trapno; sf.sf_uc.uc_mcontext.mc_err = regs->tf_err; sf.sf_uc.uc_mcontext.mc_eip = regs->tf_rip; sf.sf_uc.uc_mcontext.mc_cs = regs->tf_cs; sf.sf_uc.uc_mcontext.mc_eflags = regs->tf_rflags; sf.sf_uc.uc_mcontext.mc_esp = regs->tf_rsp; sf.sf_uc.uc_mcontext.mc_ss = regs->tf_ss; sf.sf_uc.uc_mcontext.mc_ds = regs->tf_ds; sf.sf_uc.uc_mcontext.mc_es = regs->tf_es; sf.sf_uc.uc_mcontext.mc_fs = regs->tf_fs; sf.sf_uc.uc_mcontext.mc_gs = regs->tf_gs; bzero(sf.sf_uc.uc_mcontext.mc_fpregs, sizeof(sf.sf_uc.uc_mcontext.mc_fpregs)); bzero(sf.sf_uc.uc_mcontext.__spare__, sizeof(sf.sf_uc.uc_mcontext.__spare__)); bzero(sf.sf_uc.__spare__, sizeof(sf.sf_uc.__spare__)); /* Allocate space for the signal handler context. */ if ((td->td_pflags & TDP_ALTSTACK) != 0 && !oonstack && SIGISMEMBER(psp->ps_sigonstack, sig)) { sfp = (struct ia32_sigframe4 *)((uintptr_t)td->td_sigstk.ss_sp + td->td_sigstk.ss_size - sizeof(sf)); } else sfp = (struct ia32_sigframe4 *)regs->tf_rsp - 1; PROC_UNLOCK(p); /* Build the argument list for the signal handler. */ sf.sf_signum = sig; sf.sf_ucontext = (register_t)&sfp->sf_uc; bzero(&sf.sf_si, sizeof(sf.sf_si)); if (SIGISMEMBER(psp->ps_siginfo, sig)) { /* Signal handler installed with SA_SIGINFO. */ sf.sf_siginfo = (u_int32_t)(uintptr_t)&sfp->sf_si; sf.sf_ah = (u_int32_t)(uintptr_t)catcher; /* Fill in POSIX parts */ sf.sf_si = siginfo; sf.sf_si.si_signo = sig; } else { /* Old FreeBSD-style arguments. */ sf.sf_siginfo = siginfo.si_code; sf.sf_addr = (u_int32_t)siginfo.si_addr; sf.sf_ah = (u_int32_t)(uintptr_t)catcher; } mtx_unlock(&psp->ps_mtx); /* * Copy the sigframe out to the user's stack. */ if (copyout(&sf, sfp, sizeof(*sfp)) != 0) { #ifdef DEBUG printf("process %ld has trashed its stack\n", (long)p->p_pid); #endif PROC_LOCK(p); sigexit(td, SIGILL); } regs->tf_rsp = (uintptr_t)sfp; regs->tf_rip = p->p_sysent->sv_sigcode_base + sz_ia32_sigcode - sz_freebsd4_ia32_sigcode; regs->tf_rflags &= ~(PSL_T | PSL_D); regs->tf_cs = _ucode32sel; regs->tf_ss = _udatasel; regs->tf_ds = _udatasel; regs->tf_es = _udatasel; set_pcb_flags(td->td_pcb, PCB_FULL_IRET); /* leave user %fs and %gs untouched */ PROC_LOCK(p); mtx_lock(&psp->ps_mtx); } #endif /* COMPAT_FREEBSD4 */ void ia32_sendsig(sig_t catcher, ksiginfo_t *ksi, sigset_t *mask) { struct ia32_sigframe sf, *sfp; struct siginfo32 siginfo; struct proc *p; struct thread *td; struct sigacts *psp; char *sp; struct trapframe *regs; char *xfpusave; size_t xfpusave_len; int oonstack; int sig; siginfo_to_siginfo32(&ksi->ksi_info, &siginfo); td = curthread; p = td->td_proc; PROC_LOCK_ASSERT(p, MA_OWNED); sig = siginfo.si_signo; psp = p->p_sigacts; #ifdef COMPAT_FREEBSD4 if (SIGISMEMBER(psp->ps_freebsd4, sig)) { freebsd4_ia32_sendsig(catcher, ksi, mask); return; } #endif #ifdef COMPAT_43 if (SIGISMEMBER(psp->ps_osigset, sig)) { ia32_osendsig(catcher, ksi, mask); return; } #endif mtx_assert(&psp->ps_mtx, MA_OWNED); regs = td->td_frame; oonstack = sigonstack(regs->tf_rsp); if (cpu_max_ext_state_size > sizeof(struct savefpu) && use_xsave) { xfpusave_len = cpu_max_ext_state_size - sizeof(struct savefpu); xfpusave = __builtin_alloca(xfpusave_len); } else { xfpusave_len = 0; xfpusave = NULL; } /* Save user context. */ bzero(&sf, sizeof(sf)); sf.sf_uc.uc_sigmask = *mask; sf.sf_uc.uc_stack.ss_sp = (uintptr_t)td->td_sigstk.ss_sp; sf.sf_uc.uc_stack.ss_size = td->td_sigstk.ss_size; sf.sf_uc.uc_stack.ss_flags = (td->td_pflags & TDP_ALTSTACK) ? ((oonstack) ? SS_ONSTACK : 0) : SS_DISABLE; sf.sf_uc.uc_mcontext.mc_onstack = (oonstack) ? 1 : 0; sf.sf_uc.uc_mcontext.mc_edi = regs->tf_rdi; sf.sf_uc.uc_mcontext.mc_esi = regs->tf_rsi; sf.sf_uc.uc_mcontext.mc_ebp = regs->tf_rbp; sf.sf_uc.uc_mcontext.mc_isp = regs->tf_rsp; /* XXX */ sf.sf_uc.uc_mcontext.mc_ebx = regs->tf_rbx; sf.sf_uc.uc_mcontext.mc_edx = regs->tf_rdx; sf.sf_uc.uc_mcontext.mc_ecx = regs->tf_rcx; sf.sf_uc.uc_mcontext.mc_eax = regs->tf_rax; sf.sf_uc.uc_mcontext.mc_trapno = regs->tf_trapno; sf.sf_uc.uc_mcontext.mc_err = regs->tf_err; sf.sf_uc.uc_mcontext.mc_eip = regs->tf_rip; sf.sf_uc.uc_mcontext.mc_cs = regs->tf_cs; sf.sf_uc.uc_mcontext.mc_eflags = regs->tf_rflags; sf.sf_uc.uc_mcontext.mc_esp = regs->tf_rsp; sf.sf_uc.uc_mcontext.mc_ss = regs->tf_ss; sf.sf_uc.uc_mcontext.mc_ds = regs->tf_ds; sf.sf_uc.uc_mcontext.mc_es = regs->tf_es; sf.sf_uc.uc_mcontext.mc_fs = regs->tf_fs; sf.sf_uc.uc_mcontext.mc_gs = regs->tf_gs; sf.sf_uc.uc_mcontext.mc_len = sizeof(sf.sf_uc.uc_mcontext); /* magic */ ia32_get_fpcontext(td, &sf.sf_uc.uc_mcontext, xfpusave, xfpusave_len); fpstate_drop(td); sf.sf_uc.uc_mcontext.mc_fsbase = td->td_pcb->pcb_fsbase; sf.sf_uc.uc_mcontext.mc_gsbase = td->td_pcb->pcb_gsbase; bzero(sf.sf_uc.__spare__, sizeof(sf.sf_uc.__spare__)); /* Allocate space for the signal handler context. */ if ((td->td_pflags & TDP_ALTSTACK) != 0 && !oonstack && SIGISMEMBER(psp->ps_sigonstack, sig)) sp = (char *)td->td_sigstk.ss_sp + td->td_sigstk.ss_size; else sp = (char *)regs->tf_rsp; if (xfpusave != NULL) { sp -= xfpusave_len; sp = (char *)((unsigned long)sp & ~0x3Ful); sf.sf_uc.uc_mcontext.mc_xfpustate = (register_t)sp; } sp -= sizeof(sf); /* Align to 16 bytes. */ sfp = (struct ia32_sigframe *)((uintptr_t)sp & ~0xF); PROC_UNLOCK(p); /* Build the argument list for the signal handler. */ sf.sf_signum = sig; sf.sf_ucontext = (register_t)&sfp->sf_uc; bzero(&sf.sf_si, sizeof(sf.sf_si)); if (SIGISMEMBER(psp->ps_siginfo, sig)) { /* Signal handler installed with SA_SIGINFO. */ sf.sf_siginfo = (u_int32_t)(uintptr_t)&sfp->sf_si; sf.sf_ah = (u_int32_t)(uintptr_t)catcher; /* Fill in POSIX parts */ sf.sf_si = siginfo; sf.sf_si.si_signo = sig; } else { /* Old FreeBSD-style arguments. */ sf.sf_siginfo = siginfo.si_code; sf.sf_addr = (u_int32_t)siginfo.si_addr; sf.sf_ah = (u_int32_t)(uintptr_t)catcher; } mtx_unlock(&psp->ps_mtx); /* * Copy the sigframe out to the user's stack. */ if (copyout(&sf, sfp, sizeof(*sfp)) != 0 || (xfpusave != NULL && copyout(xfpusave, PTRIN(sf.sf_uc.uc_mcontext.mc_xfpustate), xfpusave_len) != 0)) { #ifdef DEBUG printf("process %ld has trashed its stack\n", (long)p->p_pid); #endif PROC_LOCK(p); sigexit(td, SIGILL); } regs->tf_rsp = (uintptr_t)sfp; regs->tf_rip = p->p_sysent->sv_sigcode_base; regs->tf_rflags &= ~(PSL_T | PSL_D); regs->tf_cs = _ucode32sel; regs->tf_ss = _udatasel; regs->tf_ds = _udatasel; regs->tf_es = _udatasel; set_pcb_flags(td->td_pcb, PCB_FULL_IRET); /* XXXKIB leave user %fs and %gs untouched */ PROC_LOCK(p); mtx_lock(&psp->ps_mtx); } /* * System call to cleanup state after a signal * has been taken. Reset signal mask and * stack state from context left by sendsig (above). * Return to previous pc and psl as specified by * context left by sendsig. Check carefully to * make sure that the user has not modified the * state to gain improper privileges. */ #ifdef COMPAT_43 int ofreebsd32_sigreturn(struct thread *td, struct ofreebsd32_sigreturn_args *uap) { struct ia32_sigcontext3 sc, *scp; struct trapframe *regs; int eflags, error; ksiginfo_t ksi; regs = td->td_frame; error = copyin(uap->sigcntxp, &sc, sizeof(sc)); if (error != 0) return (error); scp = ≻ eflags = scp->sc_eflags; if (!EFL_SECURE(eflags, regs->tf_rflags)) { return (EINVAL); } if (!CS_SECURE(scp->sc_cs)) { ksiginfo_init_trap(&ksi); ksi.ksi_signo = SIGBUS; ksi.ksi_code = BUS_OBJERR; ksi.ksi_trapno = T_PROTFLT; ksi.ksi_addr = (void *)regs->tf_rip; trapsignal(td, &ksi); return (EINVAL); } regs->tf_ds = scp->sc_ds; regs->tf_es = scp->sc_es; regs->tf_fs = scp->sc_fs; regs->tf_gs = scp->sc_gs; regs->tf_rax = scp->sc_eax; regs->tf_rbx = scp->sc_ebx; regs->tf_rcx = scp->sc_ecx; regs->tf_rdx = scp->sc_edx; regs->tf_rsi = scp->sc_esi; regs->tf_rdi = scp->sc_edi; regs->tf_cs = scp->sc_cs; regs->tf_ss = scp->sc_ss; regs->tf_rbp = scp->sc_ebp; regs->tf_rsp = scp->sc_esp; regs->tf_rip = scp->sc_eip; regs->tf_rflags = eflags; if (scp->sc_onstack & 1) td->td_sigstk.ss_flags |= SS_ONSTACK; else td->td_sigstk.ss_flags &= ~SS_ONSTACK; kern_sigprocmask(td, SIG_SETMASK, (sigset_t *)&scp->sc_mask, NULL, SIGPROCMASK_OLD); set_pcb_flags(td->td_pcb, PCB_FULL_IRET); return (EJUSTRETURN); } #endif #ifdef COMPAT_FREEBSD4 /* * MPSAFE */ int freebsd4_freebsd32_sigreturn(td, uap) struct thread *td; struct freebsd4_freebsd32_sigreturn_args /* { const struct freebsd4_freebsd32_ucontext *sigcntxp; } */ *uap; { struct ia32_ucontext4 uc; struct trapframe *regs; struct ia32_ucontext4 *ucp; int cs, eflags, error; ksiginfo_t ksi; error = copyin(uap->sigcntxp, &uc, sizeof(uc)); if (error != 0) return (error); ucp = &uc; regs = td->td_frame; eflags = ucp->uc_mcontext.mc_eflags; /* * Don't allow users to change privileged or reserved flags. */ if (!EFL_SECURE(eflags, regs->tf_rflags)) { uprintf("pid %d (%s): freebsd4_freebsd32_sigreturn eflags = 0x%x\n", td->td_proc->p_pid, td->td_name, eflags); return (EINVAL); } /* * Don't allow users to load a valid privileged %cs. Let the * hardware check for invalid selectors, excess privilege in * other selectors, invalid %eip's and invalid %esp's. */ cs = ucp->uc_mcontext.mc_cs; if (!CS_SECURE(cs)) { uprintf("pid %d (%s): freebsd4_sigreturn cs = 0x%x\n", td->td_proc->p_pid, td->td_name, cs); ksiginfo_init_trap(&ksi); ksi.ksi_signo = SIGBUS; ksi.ksi_code = BUS_OBJERR; ksi.ksi_trapno = T_PROTFLT; ksi.ksi_addr = (void *)regs->tf_rip; trapsignal(td, &ksi); return (EINVAL); } regs->tf_rdi = ucp->uc_mcontext.mc_edi; regs->tf_rsi = ucp->uc_mcontext.mc_esi; regs->tf_rbp = ucp->uc_mcontext.mc_ebp; regs->tf_rbx = ucp->uc_mcontext.mc_ebx; regs->tf_rdx = ucp->uc_mcontext.mc_edx; regs->tf_rcx = ucp->uc_mcontext.mc_ecx; regs->tf_rax = ucp->uc_mcontext.mc_eax; regs->tf_trapno = ucp->uc_mcontext.mc_trapno; regs->tf_err = ucp->uc_mcontext.mc_err; regs->tf_rip = ucp->uc_mcontext.mc_eip; regs->tf_cs = cs; regs->tf_rflags = ucp->uc_mcontext.mc_eflags; regs->tf_rsp = ucp->uc_mcontext.mc_esp; regs->tf_ss = ucp->uc_mcontext.mc_ss; regs->tf_ds = ucp->uc_mcontext.mc_ds; regs->tf_es = ucp->uc_mcontext.mc_es; regs->tf_fs = ucp->uc_mcontext.mc_fs; regs->tf_gs = ucp->uc_mcontext.mc_gs; kern_sigprocmask(td, SIG_SETMASK, &ucp->uc_sigmask, NULL, 0); set_pcb_flags(td->td_pcb, PCB_FULL_IRET); return (EJUSTRETURN); } #endif /* COMPAT_FREEBSD4 */ /* * MPSAFE */ int freebsd32_sigreturn(td, uap) struct thread *td; struct freebsd32_sigreturn_args /* { const struct freebsd32_ucontext *sigcntxp; } */ *uap; { struct ia32_ucontext uc; struct trapframe *regs; struct ia32_ucontext *ucp; char *xfpustate; size_t xfpustate_len; int cs, eflags, error, ret; ksiginfo_t ksi; error = copyin(uap->sigcntxp, &uc, sizeof(uc)); if (error != 0) return (error); ucp = &uc; regs = td->td_frame; eflags = ucp->uc_mcontext.mc_eflags; /* * Don't allow users to change privileged or reserved flags. */ if (!EFL_SECURE(eflags, regs->tf_rflags)) { uprintf("pid %d (%s): freebsd32_sigreturn eflags = 0x%x\n", td->td_proc->p_pid, td->td_name, eflags); return (EINVAL); } /* * Don't allow users to load a valid privileged %cs. Let the * hardware check for invalid selectors, excess privilege in * other selectors, invalid %eip's and invalid %esp's. */ cs = ucp->uc_mcontext.mc_cs; if (!CS_SECURE(cs)) { uprintf("pid %d (%s): sigreturn cs = 0x%x\n", td->td_proc->p_pid, td->td_name, cs); ksiginfo_init_trap(&ksi); ksi.ksi_signo = SIGBUS; ksi.ksi_code = BUS_OBJERR; ksi.ksi_trapno = T_PROTFLT; ksi.ksi_addr = (void *)regs->tf_rip; trapsignal(td, &ksi); return (EINVAL); } if ((ucp->uc_mcontext.mc_flags & _MC_HASFPXSTATE) != 0) { xfpustate_len = uc.uc_mcontext.mc_xfpustate_len; if (xfpustate_len > cpu_max_ext_state_size - sizeof(struct savefpu)) { uprintf("pid %d (%s): sigreturn xfpusave_len = 0x%zx\n", td->td_proc->p_pid, td->td_name, xfpustate_len); return (EINVAL); } xfpustate = __builtin_alloca(xfpustate_len); error = copyin(PTRIN(ucp->uc_mcontext.mc_xfpustate), xfpustate, xfpustate_len); if (error != 0) { uprintf( "pid %d (%s): sigreturn copying xfpustate failed\n", td->td_proc->p_pid, td->td_name); return (error); } } else { xfpustate = NULL; xfpustate_len = 0; } ret = ia32_set_fpcontext(td, &ucp->uc_mcontext, xfpustate, xfpustate_len); if (ret != 0) { uprintf("pid %d (%s): sigreturn set_fpcontext err %d\n", td->td_proc->p_pid, td->td_name, ret); return (ret); } regs->tf_rdi = ucp->uc_mcontext.mc_edi; regs->tf_rsi = ucp->uc_mcontext.mc_esi; regs->tf_rbp = ucp->uc_mcontext.mc_ebp; regs->tf_rbx = ucp->uc_mcontext.mc_ebx; regs->tf_rdx = ucp->uc_mcontext.mc_edx; regs->tf_rcx = ucp->uc_mcontext.mc_ecx; regs->tf_rax = ucp->uc_mcontext.mc_eax; regs->tf_trapno = ucp->uc_mcontext.mc_trapno; regs->tf_err = ucp->uc_mcontext.mc_err; regs->tf_rip = ucp->uc_mcontext.mc_eip; regs->tf_cs = cs; regs->tf_rflags = ucp->uc_mcontext.mc_eflags; regs->tf_rsp = ucp->uc_mcontext.mc_esp; regs->tf_ss = ucp->uc_mcontext.mc_ss; regs->tf_ds = ucp->uc_mcontext.mc_ds; regs->tf_es = ucp->uc_mcontext.mc_es; regs->tf_fs = ucp->uc_mcontext.mc_fs; regs->tf_gs = ucp->uc_mcontext.mc_gs; regs->tf_flags = TF_HASSEGS; kern_sigprocmask(td, SIG_SETMASK, &ucp->uc_sigmask, NULL, 0); set_pcb_flags(td->td_pcb, PCB_FULL_IRET); return (EJUSTRETURN); } /* * Clear registers on exec */ void ia32_setregs(struct thread *td, struct image_params *imgp, u_long stack) { struct trapframe *regs = td->td_frame; struct pcb *pcb = td->td_pcb; - - mtx_lock(&dt_lock); + if (td->td_proc->p_md.md_ldt != NULL) user_ldt_free(td); - else - mtx_unlock(&dt_lock); #ifdef COMPAT_43 setup_lcall_gate(); #endif pcb->pcb_fsbase = 0; pcb->pcb_gsbase = 0; pcb->pcb_initial_fpucw = __INITIAL_FPUCW_I386__; bzero((char *)regs, sizeof(struct trapframe)); regs->tf_rip = imgp->entry_addr; regs->tf_rsp = stack; regs->tf_rflags = PSL_USER | (regs->tf_rflags & PSL_T); regs->tf_ss = _udatasel; regs->tf_cs = _ucode32sel; regs->tf_rbx = imgp->ps_strings; regs->tf_ds = _udatasel; regs->tf_es = _udatasel; regs->tf_fs = _ufssel; regs->tf_gs = _ugssel; regs->tf_flags = TF_HASSEGS; fpstate_drop(td); /* Return via doreti so that we can change to a different %cs */ set_pcb_flags(pcb, PCB_32BIT | PCB_FULL_IRET); td->td_retval[1] = 0; } Index: head/sys/amd64/linux/linux_sysvec.c =================================================================== --- head/sys/amd64/linux/linux_sysvec.c (revision 324784) +++ head/sys/amd64/linux/linux_sysvec.c (revision 324785) @@ -1,1007 +1,1004 @@ /*- * Copyright (c) 2013 Dmitry Chagin * Copyright (c) 2004 Tim J. Robbins * Copyright (c) 2003 Peter Wemm * Copyright (c) 2002 Doug Rabson * Copyright (c) 1998-1999 Andrew Gallatin * Copyright (c) 1994-1996 Søren Schmidt * All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer * in this position and unchanged. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * 3. The name of the author may not be used to endorse or promote products * derived from this software without specific prior written permission * * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. */ #include __FBSDID("$FreeBSD$"); #include "opt_compat.h" #define __ELF_WORD_SIZE 64 #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include MODULE_VERSION(linux64, 1); #if BYTE_ORDER == LITTLE_ENDIAN #define SHELLMAGIC 0x2123 /* #! */ #else #define SHELLMAGIC 0x2321 #endif #if defined(DEBUG) SYSCTL_PROC(_compat_linux, OID_AUTO, debug, CTLTYPE_STRING | CTLFLAG_RW, 0, 0, linux_sysctl_debug, "A", "Linux 64 debugging control"); #endif /* * Allow the this functions to use the ldebug() facility * even though they are not syscalls themselves. Map them * to syscall 0. This is slightly less bogus than using * ldebug(sigreturn). */ #define LINUX_SYS_linux_rt_sendsig 0 const char *linux_kplatform; static int linux_szsigcode; static vm_object_t linux_shared_page_obj; static char *linux_shared_page_mapping; extern char _binary_linux_locore_o_start; extern char _binary_linux_locore_o_end; extern struct sysent linux_sysent[LINUX_SYS_MAXSYSCALL]; SET_DECLARE(linux_ioctl_handler_set, struct linux_ioctl_handler); static register_t * linux_copyout_strings(struct image_params *imgp); static int elf_linux_fixup(register_t **stack_base, struct image_params *iparams); static boolean_t linux_trans_osrel(const Elf_Note *note, int32_t *osrel); static void linux_vdso_install(void *param); static void linux_vdso_deinstall(void *param); static void linux_set_syscall_retval(struct thread *td, int error); static int linux_fetch_syscall_args(struct thread *td); static void linux_exec_setregs(struct thread *td, struct image_params *imgp, u_long stack); static int linux_vsyscall(struct thread *td); /* * Linux syscalls return negative errno's, we do positive and map them * Reference: * FreeBSD: src/sys/sys/errno.h * Linux: linux-2.6.17.8/include/asm-generic/errno-base.h * linux-2.6.17.8/include/asm-generic/errno.h */ static int bsd_to_linux_errno[ELAST + 1] = { -0, -1, -2, -3, -4, -5, -6, -7, -8, -9, -10, -35, -12, -13, -14, -15, -16, -17, -18, -19, -20, -21, -22, -23, -24, -25, -26, -27, -28, -29, -30, -31, -32, -33, -34, -11,-115,-114, -88, -89, -90, -91, -92, -93, -94, -95, -96, -97, -98, -99, -100,-101,-102,-103,-104,-105,-106,-107,-108,-109, -110,-111, -40, -36,-112,-113, -39, -11, -87,-122, -116, -66, -6, -6, -6, -6, -6, -37, -38, -9, -6, -6, -43, -42, -75,-125, -84, -95, -16, -74, -72, -67, -71 }; #define LINUX_T_UNKNOWN 255 static int _bsd_to_linux_trapcode[] = { LINUX_T_UNKNOWN, /* 0 */ 6, /* 1 T_PRIVINFLT */ LINUX_T_UNKNOWN, /* 2 */ 3, /* 3 T_BPTFLT */ LINUX_T_UNKNOWN, /* 4 */ LINUX_T_UNKNOWN, /* 5 */ 16, /* 6 T_ARITHTRAP */ 254, /* 7 T_ASTFLT */ LINUX_T_UNKNOWN, /* 8 */ 13, /* 9 T_PROTFLT */ 1, /* 10 T_TRCTRAP */ LINUX_T_UNKNOWN, /* 11 */ 14, /* 12 T_PAGEFLT */ LINUX_T_UNKNOWN, /* 13 */ 17, /* 14 T_ALIGNFLT */ LINUX_T_UNKNOWN, /* 15 */ LINUX_T_UNKNOWN, /* 16 */ LINUX_T_UNKNOWN, /* 17 */ 0, /* 18 T_DIVIDE */ 2, /* 19 T_NMI */ 4, /* 20 T_OFLOW */ 5, /* 21 T_BOUND */ 7, /* 22 T_DNA */ 8, /* 23 T_DOUBLEFLT */ 9, /* 24 T_FPOPFLT */ 10, /* 25 T_TSSFLT */ 11, /* 26 T_SEGNPFLT */ 12, /* 27 T_STKFLT */ 18, /* 28 T_MCHK */ 19, /* 29 T_XMMFLT */ 15 /* 30 T_RESERVED */ }; #define bsd_to_linux_trapcode(code) \ ((code)td_proc; frame = td->td_frame; sa = &td->td_sa; sa->args[0] = frame->tf_rdi; sa->args[1] = frame->tf_rsi; sa->args[2] = frame->tf_rdx; sa->args[3] = frame->tf_rcx; sa->args[4] = frame->tf_r8; sa->args[5] = frame->tf_r9; sa->code = frame->tf_rax; if (sa->code >= p->p_sysent->sv_size) /* nosys */ sa->callp = &p->p_sysent->sv_table[p->p_sysent->sv_size - 1]; else sa->callp = &p->p_sysent->sv_table[sa->code]; sa->narg = sa->callp->sy_narg; td->td_retval[0] = 0; return (0); } static void linux_set_syscall_retval(struct thread *td, int error) { struct trapframe *frame = td->td_frame; /* * On Linux only %rcx and %r11 values are not preserved across * the syscall. * So, do not clobber %rdx and %r10 */ td->td_retval[1] = frame->tf_rdx; frame->tf_r10 = frame->tf_rcx; cpu_set_syscall_retval(td, error); /* Restore all registers. */ set_pcb_flags(td->td_pcb, PCB_FULL_IRET); } static int elf_linux_fixup(register_t **stack_base, struct image_params *imgp) { Elf_Auxargs *args; Elf_Addr *base; Elf_Addr *pos; struct ps_strings *arginfo; struct proc *p; int issetugid; p = imgp->proc; arginfo = (struct ps_strings *)p->p_sysent->sv_psstrings; KASSERT(curthread->td_proc == imgp->proc, ("unsafe elf_linux_fixup(), should be curproc")); base = (Elf64_Addr *)*stack_base; args = (Elf64_Auxargs *)imgp->auxargs; pos = base + (imgp->args->argc + imgp->args->envc + 2); issetugid = p->p_flag & P_SUGID ? 1 : 0; AUXARGS_ENTRY(pos, LINUX_AT_SYSINFO_EHDR, imgp->proc->p_sysent->sv_shared_page_base); AUXARGS_ENTRY(pos, LINUX_AT_HWCAP, cpu_feature); AUXARGS_ENTRY(pos, LINUX_AT_CLKTCK, stclohz); AUXARGS_ENTRY(pos, AT_PHDR, args->phdr); AUXARGS_ENTRY(pos, AT_PHENT, args->phent); AUXARGS_ENTRY(pos, AT_PHNUM, args->phnum); AUXARGS_ENTRY(pos, AT_PAGESZ, args->pagesz); AUXARGS_ENTRY(pos, AT_BASE, args->base); AUXARGS_ENTRY(pos, AT_FLAGS, args->flags); AUXARGS_ENTRY(pos, AT_ENTRY, args->entry); AUXARGS_ENTRY(pos, AT_UID, imgp->proc->p_ucred->cr_ruid); AUXARGS_ENTRY(pos, AT_EUID, imgp->proc->p_ucred->cr_svuid); AUXARGS_ENTRY(pos, AT_GID, imgp->proc->p_ucred->cr_rgid); AUXARGS_ENTRY(pos, AT_EGID, imgp->proc->p_ucred->cr_svgid); AUXARGS_ENTRY(pos, LINUX_AT_SECURE, issetugid); AUXARGS_ENTRY(pos, LINUX_AT_PLATFORM, PTROUT(linux_platform)); AUXARGS_ENTRY(pos, LINUX_AT_RANDOM, imgp->canary); if (imgp->execpathp != 0) AUXARGS_ENTRY(pos, LINUX_AT_EXECFN, imgp->execpathp); if (args->execfd != -1) AUXARGS_ENTRY(pos, AT_EXECFD, args->execfd); AUXARGS_ENTRY(pos, AT_NULL, 0); free(imgp->auxargs, M_TEMP); imgp->auxargs = NULL; base--; suword(base, (uint64_t)imgp->args->argc); *stack_base = (register_t *)base; return (0); } /* * Copy strings out to the new process address space, constructing new arg * and env vector tables. Return a pointer to the base so that it can be used * as the initial stack pointer. */ static register_t * linux_copyout_strings(struct image_params *imgp) { int argc, envc; char **vectp; char *stringp, *destp; register_t *stack_base; struct ps_strings *arginfo; char canary[LINUX_AT_RANDOM_LEN]; size_t execpath_len; struct proc *p; /* * Calculate string base and vector table pointers. */ if (imgp->execpath != NULL && imgp->auxargs != NULL) execpath_len = strlen(imgp->execpath) + 1; else execpath_len = 0; p = imgp->proc; arginfo = (struct ps_strings *)p->p_sysent->sv_psstrings; destp = (caddr_t)arginfo - SPARE_USRSPACE - roundup(sizeof(canary), sizeof(char *)) - roundup(execpath_len, sizeof(char *)) - roundup(ARG_MAX - imgp->args->stringspace, sizeof(char *)); if (execpath_len != 0) { imgp->execpathp = (uintptr_t)arginfo - execpath_len; copyout(imgp->execpath, (void *)imgp->execpathp, execpath_len); } /* * Prepare the canary for SSP. */ arc4rand(canary, sizeof(canary), 0); imgp->canary = (uintptr_t)arginfo - roundup(execpath_len, sizeof(char *)) - roundup(sizeof(canary), sizeof(char *)); copyout(canary, (void *)imgp->canary, sizeof(canary)); /* * If we have a valid auxargs ptr, prepare some room * on the stack. */ if (imgp->auxargs) { /* * 'AT_COUNT*2' is size for the ELF Auxargs data. This is for * lower compatibility. */ imgp->auxarg_size = (imgp->auxarg_size) ? imgp->auxarg_size : (LINUX_AT_COUNT * 2); /* * The '+ 2' is for the null pointers at the end of each of * the arg and env vector sets,and imgp->auxarg_size is room * for argument of Runtime loader. */ vectp = (char **)(destp - (imgp->args->argc + imgp->args->envc + 2 + imgp->auxarg_size) * sizeof(char *)); } else { /* * The '+ 2' is for the null pointers at the end of each of * the arg and env vector sets */ vectp = (char **)(destp - (imgp->args->argc + imgp->args->envc + 2) * sizeof(char *)); } /* * vectp also becomes our initial stack base */ stack_base = (register_t *)vectp; stringp = imgp->args->begin_argv; argc = imgp->args->argc; envc = imgp->args->envc; /* * Copy out strings - arguments and environment. */ copyout(stringp, destp, ARG_MAX - imgp->args->stringspace); /* * Fill in "ps_strings" struct for ps, w, etc. */ suword(&arginfo->ps_argvstr, (long)(intptr_t)vectp); suword(&arginfo->ps_nargvstr, argc); /* * Fill in argument portion of vector table. */ for (; argc > 0; --argc) { suword(vectp++, (long)(intptr_t)destp); while (*stringp++ != 0) destp++; destp++; } /* a null vector table pointer separates the argp's from the envp's */ suword(vectp++, 0); suword(&arginfo->ps_envstr, (long)(intptr_t)vectp); suword(&arginfo->ps_nenvstr, envc); /* * Fill in environment portion of vector table. */ for (; envc > 0; --envc) { suword(vectp++, (long)(intptr_t)destp); while (*stringp++ != 0) destp++; destp++; } /* end of vector table is a null pointer */ suword(vectp, 0); return (stack_base); } /* * Reset registers to default values on exec. */ static void linux_exec_setregs(struct thread *td, struct image_params *imgp, u_long stack) { struct trapframe *regs = td->td_frame; struct pcb *pcb = td->td_pcb; - mtx_lock(&dt_lock); if (td->td_proc->p_md.md_ldt != NULL) user_ldt_free(td); - else - mtx_unlock(&dt_lock); pcb->pcb_fsbase = 0; pcb->pcb_gsbase = 0; clear_pcb_flags(pcb, PCB_32BIT); pcb->pcb_initial_fpucw = __LINUX_NPXCW__; set_pcb_flags(pcb, PCB_FULL_IRET); bzero((char *)regs, sizeof(struct trapframe)); regs->tf_rip = imgp->entry_addr; regs->tf_rsp = stack; regs->tf_rflags = PSL_USER | (regs->tf_rflags & PSL_T); regs->tf_ss = _udatasel; regs->tf_cs = _ucodesel; regs->tf_ds = _udatasel; regs->tf_es = _udatasel; regs->tf_fs = _ufssel; regs->tf_gs = _ugssel; regs->tf_flags = TF_HASSEGS; /* * Reset the hardware debug registers if they were in use. * They won't have any meaning for the newly exec'd process. */ if (pcb->pcb_flags & PCB_DBREGS) { pcb->pcb_dr0 = 0; pcb->pcb_dr1 = 0; pcb->pcb_dr2 = 0; pcb->pcb_dr3 = 0; pcb->pcb_dr6 = 0; pcb->pcb_dr7 = 0; if (pcb == curpcb) { /* * Clear the debug registers on the running * CPU, otherwise they will end up affecting * the next process we switch to. */ reset_dbregs(); } clear_pcb_flags(pcb, PCB_DBREGS); } /* * Drop the FP state if we hold it, so that the process gets a * clean FP state if it uses the FPU again. */ fpstate_drop(td); } /* * Copied from amd64/amd64/machdep.c * * XXX fpu state need? don't think so */ int linux_rt_sigreturn(struct thread *td, struct linux_rt_sigreturn_args *args) { struct proc *p; struct l_ucontext uc; struct l_sigcontext *context; struct trapframe *regs; unsigned long rflags; int error; ksiginfo_t ksi; regs = td->td_frame; error = copyin((void *)regs->tf_rbx, &uc, sizeof(uc)); if (error != 0) return (error); p = td->td_proc; context = &uc.uc_mcontext; rflags = context->sc_rflags; /* * Don't allow users to change privileged or reserved flags. */ /* * XXX do allow users to change the privileged flag PSL_RF. * The cpu sets PSL_RF in tf_rflags for faults. Debuggers * should sometimes set it there too. tf_rflags is kept in * the signal context during signal handling and there is no * other place to remember it, so the PSL_RF bit may be * corrupted by the signal handler without us knowing. * Corruption of the PSL_RF bit at worst causes one more or * one less debugger trap, so allowing it is fairly harmless. */ #define RFLAG_SECURE(ef, oef) ((((ef) ^ (oef)) & ~PSL_USERCHANGE) == 0) if (!RFLAG_SECURE(rflags & ~PSL_RF, regs->tf_rflags & ~PSL_RF)) { printf("linux_rt_sigreturn: rflags = 0x%lx\n", rflags); return (EINVAL); } /* * Don't allow users to load a valid privileged %cs. Let the * hardware check for invalid selectors, excess privilege in * other selectors, invalid %eip's and invalid %esp's. */ #define CS_SECURE(cs) (ISPL(cs) == SEL_UPL) if (!CS_SECURE(context->sc_cs)) { printf("linux_rt_sigreturn: cs = 0x%x\n", context->sc_cs); ksiginfo_init_trap(&ksi); ksi.ksi_signo = SIGBUS; ksi.ksi_code = BUS_OBJERR; ksi.ksi_trapno = T_PROTFLT; ksi.ksi_addr = (void *)regs->tf_rip; trapsignal(td, &ksi); return (EINVAL); } PROC_LOCK(p); linux_to_bsd_sigset(&uc.uc_sigmask, &td->td_sigmask); SIG_CANTMASK(td->td_sigmask); signotify(td); PROC_UNLOCK(p); regs->tf_rdi = context->sc_rdi; regs->tf_rsi = context->sc_rsi; regs->tf_rdx = context->sc_rdx; regs->tf_rbp = context->sc_rbp; regs->tf_rbx = context->sc_rbx; regs->tf_rcx = context->sc_rcx; regs->tf_rax = context->sc_rax; regs->tf_rip = context->sc_rip; regs->tf_rsp = context->sc_rsp; regs->tf_r8 = context->sc_r8; regs->tf_r9 = context->sc_r9; regs->tf_r10 = context->sc_r10; regs->tf_r11 = context->sc_r11; regs->tf_r12 = context->sc_r12; regs->tf_r13 = context->sc_r13; regs->tf_r14 = context->sc_r14; regs->tf_r15 = context->sc_r15; regs->tf_cs = context->sc_cs; regs->tf_err = context->sc_err; regs->tf_rflags = rflags; set_pcb_flags(td->td_pcb, PCB_FULL_IRET); return (EJUSTRETURN); } /* * copied from amd64/amd64/machdep.c * * Send an interrupt to process. */ static void linux_rt_sendsig(sig_t catcher, ksiginfo_t *ksi, sigset_t *mask) { struct l_rt_sigframe sf, *sfp; struct proc *p; struct thread *td; struct sigacts *psp; caddr_t sp; struct trapframe *regs; int sig, code; int oonstack; td = curthread; p = td->td_proc; PROC_LOCK_ASSERT(p, MA_OWNED); sig = ksi->ksi_signo; psp = p->p_sigacts; code = ksi->ksi_code; mtx_assert(&psp->ps_mtx, MA_OWNED); regs = td->td_frame; oonstack = sigonstack(regs->tf_rsp); LINUX_CTR4(rt_sendsig, "%p, %d, %p, %u", catcher, sig, mask, code); /* Allocate space for the signal handler context. */ if ((td->td_pflags & TDP_ALTSTACK) != 0 && !oonstack && SIGISMEMBER(psp->ps_sigonstack, sig)) { sp = (caddr_t)td->td_sigstk.ss_sp + td->td_sigstk.ss_size - sizeof(struct l_rt_sigframe); } else sp = (caddr_t)regs->tf_rsp - sizeof(struct l_rt_sigframe) - 128; /* Align to 16 bytes. */ sfp = (struct l_rt_sigframe *)((unsigned long)sp & ~0xFul); mtx_unlock(&psp->ps_mtx); /* Translate the signal. */ sig = bsd_to_linux_signal(sig); /* Save user context. */ bzero(&sf, sizeof(sf)); bsd_to_linux_sigset(mask, &sf.sf_sc.uc_sigmask); bsd_to_linux_sigset(mask, &sf.sf_sc.uc_mcontext.sc_mask); sf.sf_sc.uc_stack.ss_sp = PTROUT(td->td_sigstk.ss_sp); sf.sf_sc.uc_stack.ss_size = td->td_sigstk.ss_size; sf.sf_sc.uc_stack.ss_flags = (td->td_pflags & TDP_ALTSTACK) ? ((oonstack) ? LINUX_SS_ONSTACK : 0) : LINUX_SS_DISABLE; PROC_UNLOCK(p); sf.sf_sc.uc_mcontext.sc_rdi = regs->tf_rdi; sf.sf_sc.uc_mcontext.sc_rsi = regs->tf_rsi; sf.sf_sc.uc_mcontext.sc_rdx = regs->tf_rdx; sf.sf_sc.uc_mcontext.sc_rbp = regs->tf_rbp; sf.sf_sc.uc_mcontext.sc_rbx = regs->tf_rbx; sf.sf_sc.uc_mcontext.sc_rcx = regs->tf_rcx; sf.sf_sc.uc_mcontext.sc_rax = regs->tf_rax; sf.sf_sc.uc_mcontext.sc_rip = regs->tf_rip; sf.sf_sc.uc_mcontext.sc_rsp = regs->tf_rsp; sf.sf_sc.uc_mcontext.sc_r8 = regs->tf_r8; sf.sf_sc.uc_mcontext.sc_r9 = regs->tf_r9; sf.sf_sc.uc_mcontext.sc_r10 = regs->tf_r10; sf.sf_sc.uc_mcontext.sc_r11 = regs->tf_r11; sf.sf_sc.uc_mcontext.sc_r12 = regs->tf_r12; sf.sf_sc.uc_mcontext.sc_r13 = regs->tf_r13; sf.sf_sc.uc_mcontext.sc_r14 = regs->tf_r14; sf.sf_sc.uc_mcontext.sc_r15 = regs->tf_r15; sf.sf_sc.uc_mcontext.sc_cs = regs->tf_cs; sf.sf_sc.uc_mcontext.sc_rflags = regs->tf_rflags; sf.sf_sc.uc_mcontext.sc_err = regs->tf_err; sf.sf_sc.uc_mcontext.sc_trapno = bsd_to_linux_trapcode(code); sf.sf_sc.uc_mcontext.sc_cr2 = (register_t)ksi->ksi_addr; /* Build the argument list for the signal handler. */ regs->tf_rdi = sig; /* arg 1 in %rdi */ regs->tf_rax = 0; regs->tf_rsi = (register_t)&sfp->sf_si; /* arg 2 in %rsi */ regs->tf_rdx = (register_t)&sfp->sf_sc; /* arg 3 in %rdx */ sf.sf_handler = catcher; /* Fill in POSIX parts */ ksiginfo_to_lsiginfo(ksi, &sf.sf_si, sig); /* * Copy the sigframe out to the user's stack. */ if (copyout(&sf, sfp, sizeof(*sfp)) != 0) { #ifdef DEBUG printf("process %ld has trashed its stack\n", (long)p->p_pid); #endif PROC_LOCK(p); sigexit(td, SIGILL); } regs->tf_rsp = (long)sfp; regs->tf_rip = linux_rt_sigcode; regs->tf_rflags &= ~(PSL_T | PSL_D); regs->tf_cs = _ucodesel; set_pcb_flags(td->td_pcb, PCB_FULL_IRET); PROC_LOCK(p); mtx_lock(&psp->ps_mtx); } /* * If a linux binary is exec'ing something, try this image activator * first. We override standard shell script execution in order to * be able to modify the interpreter path. We only do this if a linux * binary is doing the exec, so we do not create an EXEC module for it. */ static int exec_linux_imgact_try(struct image_params *iparams); static int exec_linux_imgact_try(struct image_params *imgp) { const char *head = (const char *)imgp->image_header; char *rpath; int error = -1; /* * The interpreter for shell scripts run from a linux binary needs * to be located in /compat/linux if possible in order to recursively * maintain linux path emulation. */ if (((const short *)head)[0] == SHELLMAGIC) { /* * Run our normal shell image activator. If it succeeds * attempt to use the alternate path for the interpreter. * If an alternate path is found, use our stringspace * to store it. */ if ((error = exec_shell_imgact(imgp)) == 0) { linux_emul_convpath(FIRST_THREAD_IN_PROC(imgp->proc), imgp->interpreter_name, UIO_SYSSPACE, &rpath, 0, AT_FDCWD); if (rpath != NULL) imgp->args->fname_buf = imgp->interpreter_name = rpath; } } return (error); } #define LINUX_VSYSCALL_START (-10UL << 20) #define LINUX_VSYSCALL_SZ 1024 const unsigned long linux_vsyscall_vector[] = { LINUX_SYS_gettimeofday, LINUX_SYS_linux_time, /* getcpu not implemented */ }; static int linux_vsyscall(struct thread *td) { struct trapframe *frame; uint64_t retqaddr; int code, traced; int error; frame = td->td_frame; /* Check %rip for vsyscall area */ if (__predict_true(frame->tf_rip < LINUX_VSYSCALL_START)) return (EINVAL); if ((frame->tf_rip & (LINUX_VSYSCALL_SZ - 1)) != 0) return (EINVAL); code = (frame->tf_rip - LINUX_VSYSCALL_START) / LINUX_VSYSCALL_SZ; if (code >= nitems(linux_vsyscall_vector)) return (EINVAL); /* * vsyscall called as callq *(%rax), so we must * use return address from %rsp and also fixup %rsp */ error = copyin((void *)frame->tf_rsp, &retqaddr, sizeof(retqaddr)); if (error) return (error); frame->tf_rip = retqaddr; frame->tf_rax = linux_vsyscall_vector[code]; frame->tf_rsp += 8; traced = (frame->tf_flags & PSL_T); amd64_syscall(td, traced); return (0); } struct sysentvec elf_linux_sysvec = { .sv_size = LINUX_SYS_MAXSYSCALL, .sv_table = linux_sysent, .sv_mask = 0, .sv_errsize = ELAST + 1, .sv_errtbl = bsd_to_linux_errno, .sv_transtrap = translate_traps, .sv_fixup = elf_linux_fixup, .sv_sendsig = linux_rt_sendsig, .sv_sigcode = &_binary_linux_locore_o_start, .sv_szsigcode = &linux_szsigcode, .sv_name = "Linux ELF64", .sv_coredump = elf64_coredump, .sv_imgact_try = exec_linux_imgact_try, .sv_minsigstksz = LINUX_MINSIGSTKSZ, .sv_pagesize = PAGE_SIZE, .sv_minuser = VM_MIN_ADDRESS, .sv_maxuser = VM_MAXUSER_ADDRESS, .sv_usrstack = USRSTACK, .sv_psstrings = PS_STRINGS, .sv_stackprot = VM_PROT_ALL, .sv_copyout_strings = linux_copyout_strings, .sv_setregs = linux_exec_setregs, .sv_fixlimit = NULL, .sv_maxssiz = NULL, .sv_flags = SV_ABI_LINUX | SV_LP64 | SV_SHP, .sv_set_syscall_retval = linux_set_syscall_retval, .sv_fetch_syscall_args = linux_fetch_syscall_args, .sv_syscallnames = NULL, .sv_shared_page_base = SHAREDPAGE, .sv_shared_page_len = PAGE_SIZE, .sv_schedtail = linux_schedtail, .sv_thread_detach = linux_thread_detach, .sv_trap = linux_vsyscall, }; static void linux_vdso_install(void *param) { amd64_lower_shared_page(&elf_linux_sysvec); linux_szsigcode = (&_binary_linux_locore_o_end - &_binary_linux_locore_o_start); if (linux_szsigcode > elf_linux_sysvec.sv_shared_page_len) panic("Linux invalid vdso size\n"); __elfN(linux_vdso_fixup)(&elf_linux_sysvec); linux_shared_page_obj = __elfN(linux_shared_page_init) (&linux_shared_page_mapping); __elfN(linux_vdso_reloc)(&elf_linux_sysvec); bcopy(elf_linux_sysvec.sv_sigcode, linux_shared_page_mapping, linux_szsigcode); elf_linux_sysvec.sv_shared_page_obj = linux_shared_page_obj; linux_kplatform = linux_shared_page_mapping + (linux_platform - (caddr_t)elf_linux_sysvec.sv_shared_page_base); } SYSINIT(elf_linux_vdso_init, SI_SUB_EXEC, SI_ORDER_ANY, (sysinit_cfunc_t)linux_vdso_install, NULL); static void linux_vdso_deinstall(void *param) { __elfN(linux_shared_page_fini)(linux_shared_page_obj); }; SYSUNINIT(elf_linux_vdso_uninit, SI_SUB_EXEC, SI_ORDER_FIRST, (sysinit_cfunc_t)linux_vdso_deinstall, NULL); static char GNULINUX_ABI_VENDOR[] = "GNU"; static int GNULINUX_ABI_DESC = 0; static boolean_t linux_trans_osrel(const Elf_Note *note, int32_t *osrel) { const Elf32_Word *desc; uintptr_t p; p = (uintptr_t)(note + 1); p += roundup2(note->n_namesz, sizeof(Elf32_Addr)); desc = (const Elf32_Word *)p; if (desc[0] != GNULINUX_ABI_DESC) return (FALSE); /* * For linux we encode osrel as follows (see linux_mib.c): * VVVMMMIII (version, major, minor), see linux_mib.c. */ *osrel = desc[1] * 1000000 + desc[2] * 1000 + desc[3]; return (TRUE); } static Elf_Brandnote linux64_brandnote = { .hdr.n_namesz = sizeof(GNULINUX_ABI_VENDOR), .hdr.n_descsz = 16, .hdr.n_type = 1, .vendor = GNULINUX_ABI_VENDOR, .flags = BN_TRANSLATE_OSREL, .trans_osrel = linux_trans_osrel }; static Elf64_Brandinfo linux_glibc2brand = { .brand = ELFOSABI_LINUX, .machine = EM_X86_64, .compat_3_brand = "Linux", .emul_path = "/compat/linux", .interp_path = "/lib64/ld-linux-x86-64.so.2", .sysvec = &elf_linux_sysvec, .interp_newpath = NULL, .brand_note = &linux64_brandnote, .flags = BI_CAN_EXEC_DYN | BI_BRAND_NOTE }; static Elf64_Brandinfo linux_glibc2brandshort = { .brand = ELFOSABI_LINUX, .machine = EM_X86_64, .compat_3_brand = "Linux", .emul_path = "/compat/linux", .interp_path = "/lib64/ld-linux.so.2", .sysvec = &elf_linux_sysvec, .interp_newpath = NULL, .brand_note = &linux64_brandnote, .flags = BI_CAN_EXEC_DYN | BI_BRAND_NOTE }; static Elf64_Brandinfo linux_muslbrand = { .brand = ELFOSABI_LINUX, .machine = EM_X86_64, .compat_3_brand = "Linux", .emul_path = "/compat/linux", .interp_path = "/lib/ld-musl-x86_64.so.1", .sysvec = &elf_linux_sysvec, .interp_newpath = NULL, .brand_note = &linux64_brandnote, .flags = BI_CAN_EXEC_DYN | BI_BRAND_NOTE }; Elf64_Brandinfo *linux_brandlist[] = { &linux_glibc2brand, &linux_glibc2brandshort, &linux_muslbrand, NULL }; static int linux64_elf_modevent(module_t mod, int type, void *data) { Elf64_Brandinfo **brandinfo; int error; struct linux_ioctl_handler **lihp; error = 0; switch(type) { case MOD_LOAD: for (brandinfo = &linux_brandlist[0]; *brandinfo != NULL; ++brandinfo) if (elf64_insert_brand_entry(*brandinfo) < 0) error = EINVAL; if (error == 0) { SET_FOREACH(lihp, linux_ioctl_handler_set) linux_ioctl_register_handler(*lihp); LIST_INIT(&futex_list); mtx_init(&futex_mtx, "ftllk64", NULL, MTX_DEF); stclohz = (stathz ? stathz : hz); if (bootverbose) printf("Linux x86-64 ELF exec handler installed\n"); } else printf("cannot insert Linux x86-64 ELF brand handler\n"); break; case MOD_UNLOAD: for (brandinfo = &linux_brandlist[0]; *brandinfo != NULL; ++brandinfo) if (elf64_brand_inuse(*brandinfo)) error = EBUSY; if (error == 0) { for (brandinfo = &linux_brandlist[0]; *brandinfo != NULL; ++brandinfo) if (elf64_remove_brand_entry(*brandinfo) < 0) error = EINVAL; } if (error == 0) { SET_FOREACH(lihp, linux_ioctl_handler_set) linux_ioctl_unregister_handler(*lihp); mtx_destroy(&futex_mtx); if (bootverbose) printf("Linux ELF exec handler removed\n"); } else printf("Could not deinstall ELF interpreter entry\n"); break; default: return (EOPNOTSUPP); } return (error); } static moduledata_t linux64_elf_mod = { "linux64elf", linux64_elf_modevent, 0 }; DECLARE_MODULE_TIED(linux64elf, linux64_elf_mod, SI_SUB_EXEC, SI_ORDER_ANY); MODULE_DEPEND(linux64elf, linux_common, 1, 1, 1); FEATURE(linux64, "Linux 64bit support"); Index: head/sys/amd64/linux32/linux32_sysvec.c =================================================================== --- head/sys/amd64/linux32/linux32_sysvec.c (revision 324784) +++ head/sys/amd64/linux32/linux32_sysvec.c (revision 324785) @@ -1,1223 +1,1220 @@ /*- * Copyright (c) 2004 Tim J. Robbins * Copyright (c) 2003 Peter Wemm * Copyright (c) 2002 Doug Rabson * Copyright (c) 1998-1999 Andrew Gallatin * Copyright (c) 1994-1996 Søren Schmidt * All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer * in this position and unchanged. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * 3. The name of the author may not be used to endorse or promote products * derived from this software without specific prior written permission * * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. */ #include __FBSDID("$FreeBSD$"); #include "opt_compat.h" #ifndef COMPAT_FREEBSD32 #error "Unable to compile Linux-emulator due to missing COMPAT_FREEBSD32 option!" #endif #define __ELF_WORD_SIZE 32 #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include MODULE_VERSION(linux, 1); #define AUXARGS_ENTRY_32(pos, id, val) \ do { \ suword32(pos++, id); \ suword32(pos++, val); \ } while (0) #if BYTE_ORDER == LITTLE_ENDIAN #define SHELLMAGIC 0x2123 /* #! */ #else #define SHELLMAGIC 0x2321 #endif /* * Allow the sendsig functions to use the ldebug() facility * even though they are not syscalls themselves. Map them * to syscall 0. This is slightly less bogus than using * ldebug(sigreturn). */ #define LINUX32_SYS_linux_rt_sendsig 0 #define LINUX32_SYS_linux_sendsig 0 const char *linux_kplatform; static int linux_szsigcode; static vm_object_t linux_shared_page_obj; static char *linux_shared_page_mapping; extern char _binary_linux32_locore_o_start; extern char _binary_linux32_locore_o_end; extern struct sysent linux32_sysent[LINUX32_SYS_MAXSYSCALL]; SET_DECLARE(linux_ioctl_handler_set, struct linux_ioctl_handler); static int elf_linux_fixup(register_t **stack_base, struct image_params *iparams); static register_t *linux_copyout_strings(struct image_params *imgp); static void linux_sendsig(sig_t catcher, ksiginfo_t *ksi, sigset_t *mask); static void exec_linux_setregs(struct thread *td, struct image_params *imgp, u_long stack); static void linux32_fixlimit(struct rlimit *rl, int which); static boolean_t linux32_trans_osrel(const Elf_Note *note, int32_t *osrel); static void linux_vdso_install(void *param); static void linux_vdso_deinstall(void *param); /* * Linux syscalls return negative errno's, we do positive and map them * Reference: * FreeBSD: src/sys/sys/errno.h * Linux: linux-2.6.17.8/include/asm-generic/errno-base.h * linux-2.6.17.8/include/asm-generic/errno.h */ static int bsd_to_linux_errno[ELAST + 1] = { -0, -1, -2, -3, -4, -5, -6, -7, -8, -9, -10, -35, -12, -13, -14, -15, -16, -17, -18, -19, -20, -21, -22, -23, -24, -25, -26, -27, -28, -29, -30, -31, -32, -33, -34, -11,-115,-114, -88, -89, -90, -91, -92, -93, -94, -95, -96, -97, -98, -99, -100,-101,-102,-103,-104,-105,-106,-107,-108,-109, -110,-111, -40, -36,-112,-113, -39, -11, -87,-122, -116, -66, -6, -6, -6, -6, -6, -37, -38, -9, -6, -6, -43, -42, -75,-125, -84, -95, -16, -74, -72, -67, -71 }; #define LINUX_T_UNKNOWN 255 static int _bsd_to_linux_trapcode[] = { LINUX_T_UNKNOWN, /* 0 */ 6, /* 1 T_PRIVINFLT */ LINUX_T_UNKNOWN, /* 2 */ 3, /* 3 T_BPTFLT */ LINUX_T_UNKNOWN, /* 4 */ LINUX_T_UNKNOWN, /* 5 */ 16, /* 6 T_ARITHTRAP */ 254, /* 7 T_ASTFLT */ LINUX_T_UNKNOWN, /* 8 */ 13, /* 9 T_PROTFLT */ 1, /* 10 T_TRCTRAP */ LINUX_T_UNKNOWN, /* 11 */ 14, /* 12 T_PAGEFLT */ LINUX_T_UNKNOWN, /* 13 */ 17, /* 14 T_ALIGNFLT */ LINUX_T_UNKNOWN, /* 15 */ LINUX_T_UNKNOWN, /* 16 */ LINUX_T_UNKNOWN, /* 17 */ 0, /* 18 T_DIVIDE */ 2, /* 19 T_NMI */ 4, /* 20 T_OFLOW */ 5, /* 21 T_BOUND */ 7, /* 22 T_DNA */ 8, /* 23 T_DOUBLEFLT */ 9, /* 24 T_FPOPFLT */ 10, /* 25 T_TSSFLT */ 11, /* 26 T_SEGNPFLT */ 12, /* 27 T_STKFLT */ 18, /* 28 T_MCHK */ 19, /* 29 T_XMMFLT */ 15 /* 30 T_RESERVED */ }; #define bsd_to_linux_trapcode(code) \ ((code)td_proc == imgp->proc, ("unsafe elf_linux_fixup(), should be curproc")); base = (Elf32_Addr *)*stack_base; args = (Elf32_Auxargs *)imgp->auxargs; pos = base + (imgp->args->argc + imgp->args->envc + 2); issetugid = imgp->proc->p_flag & P_SUGID ? 1 : 0; AUXARGS_ENTRY_32(pos, LINUX_AT_SYSINFO_EHDR, imgp->proc->p_sysent->sv_shared_page_base); AUXARGS_ENTRY_32(pos, LINUX_AT_SYSINFO, linux32_vsyscall); AUXARGS_ENTRY_32(pos, LINUX_AT_HWCAP, cpu_feature); /* * Do not export AT_CLKTCK when emulating Linux kernel prior to 2.4.0, * as it has appeared in the 2.4.0-rc7 first time. * Being exported, AT_CLKTCK is returned by sysconf(_SC_CLK_TCK), * glibc falls back to the hard-coded CLK_TCK value when aux entry * is not present. * Also see linux_times() implementation. */ if (linux_kernver(curthread) >= LINUX_KERNVER_2004000) AUXARGS_ENTRY_32(pos, LINUX_AT_CLKTCK, stclohz); AUXARGS_ENTRY_32(pos, AT_PHDR, args->phdr); AUXARGS_ENTRY_32(pos, AT_PHENT, args->phent); AUXARGS_ENTRY_32(pos, AT_PHNUM, args->phnum); AUXARGS_ENTRY_32(pos, AT_PAGESZ, args->pagesz); AUXARGS_ENTRY_32(pos, AT_FLAGS, args->flags); AUXARGS_ENTRY_32(pos, AT_ENTRY, args->entry); AUXARGS_ENTRY_32(pos, AT_BASE, args->base); AUXARGS_ENTRY_32(pos, LINUX_AT_SECURE, issetugid); AUXARGS_ENTRY_32(pos, AT_UID, imgp->proc->p_ucred->cr_ruid); AUXARGS_ENTRY_32(pos, AT_EUID, imgp->proc->p_ucred->cr_svuid); AUXARGS_ENTRY_32(pos, AT_GID, imgp->proc->p_ucred->cr_rgid); AUXARGS_ENTRY_32(pos, AT_EGID, imgp->proc->p_ucred->cr_svgid); AUXARGS_ENTRY_32(pos, LINUX_AT_PLATFORM, PTROUT(linux_platform)); AUXARGS_ENTRY(pos, LINUX_AT_RANDOM, PTROUT(imgp->canary)); if (imgp->execpathp != 0) AUXARGS_ENTRY(pos, LINUX_AT_EXECFN, PTROUT(imgp->execpathp)); if (args->execfd != -1) AUXARGS_ENTRY_32(pos, AT_EXECFD, args->execfd); AUXARGS_ENTRY_32(pos, AT_NULL, 0); free(imgp->auxargs, M_TEMP); imgp->auxargs = NULL; base--; suword32(base, (uint32_t)imgp->args->argc); *stack_base = (register_t *)base; return (0); } static void linux_rt_sendsig(sig_t catcher, ksiginfo_t *ksi, sigset_t *mask) { struct thread *td = curthread; struct proc *p = td->td_proc; struct sigacts *psp; struct trapframe *regs; struct l_rt_sigframe *fp, frame; int oonstack; int sig; int code; sig = ksi->ksi_signo; code = ksi->ksi_code; PROC_LOCK_ASSERT(p, MA_OWNED); psp = p->p_sigacts; mtx_assert(&psp->ps_mtx, MA_OWNED); regs = td->td_frame; oonstack = sigonstack(regs->tf_rsp); #ifdef DEBUG if (ldebug(rt_sendsig)) printf(ARGS(rt_sendsig, "%p, %d, %p, %u"), catcher, sig, (void*)mask, code); #endif /* * Allocate space for the signal handler context. */ if ((td->td_pflags & TDP_ALTSTACK) && !oonstack && SIGISMEMBER(psp->ps_sigonstack, sig)) { fp = (struct l_rt_sigframe *)((uintptr_t)td->td_sigstk.ss_sp + td->td_sigstk.ss_size - sizeof(struct l_rt_sigframe)); } else fp = (struct l_rt_sigframe *)regs->tf_rsp - 1; mtx_unlock(&psp->ps_mtx); /* * Build the argument list for the signal handler. */ sig = bsd_to_linux_signal(sig); bzero(&frame, sizeof(frame)); frame.sf_handler = PTROUT(catcher); frame.sf_sig = sig; frame.sf_siginfo = PTROUT(&fp->sf_si); frame.sf_ucontext = PTROUT(&fp->sf_sc); /* Fill in POSIX parts */ ksiginfo_to_lsiginfo(ksi, &frame.sf_si, sig); /* * Build the signal context to be used by sigreturn * and libgcc unwind. */ frame.sf_sc.uc_flags = 0; /* XXX ??? */ frame.sf_sc.uc_link = 0; /* XXX ??? */ frame.sf_sc.uc_stack.ss_sp = PTROUT(td->td_sigstk.ss_sp); frame.sf_sc.uc_stack.ss_size = td->td_sigstk.ss_size; frame.sf_sc.uc_stack.ss_flags = (td->td_pflags & TDP_ALTSTACK) ? ((oonstack) ? LINUX_SS_ONSTACK : 0) : LINUX_SS_DISABLE; PROC_UNLOCK(p); bsd_to_linux_sigset(mask, &frame.sf_sc.uc_sigmask); frame.sf_sc.uc_mcontext.sc_mask = frame.sf_sc.uc_sigmask.__mask; frame.sf_sc.uc_mcontext.sc_edi = regs->tf_rdi; frame.sf_sc.uc_mcontext.sc_esi = regs->tf_rsi; frame.sf_sc.uc_mcontext.sc_ebp = regs->tf_rbp; frame.sf_sc.uc_mcontext.sc_ebx = regs->tf_rbx; frame.sf_sc.uc_mcontext.sc_esp = regs->tf_rsp; frame.sf_sc.uc_mcontext.sc_edx = regs->tf_rdx; frame.sf_sc.uc_mcontext.sc_ecx = regs->tf_rcx; frame.sf_sc.uc_mcontext.sc_eax = regs->tf_rax; frame.sf_sc.uc_mcontext.sc_eip = regs->tf_rip; frame.sf_sc.uc_mcontext.sc_cs = regs->tf_cs; frame.sf_sc.uc_mcontext.sc_gs = regs->tf_gs; frame.sf_sc.uc_mcontext.sc_fs = regs->tf_fs; frame.sf_sc.uc_mcontext.sc_es = regs->tf_es; frame.sf_sc.uc_mcontext.sc_ds = regs->tf_ds; frame.sf_sc.uc_mcontext.sc_eflags = regs->tf_rflags; frame.sf_sc.uc_mcontext.sc_esp_at_signal = regs->tf_rsp; frame.sf_sc.uc_mcontext.sc_ss = regs->tf_ss; frame.sf_sc.uc_mcontext.sc_err = regs->tf_err; frame.sf_sc.uc_mcontext.sc_cr2 = (u_int32_t)(uintptr_t)ksi->ksi_addr; frame.sf_sc.uc_mcontext.sc_trapno = bsd_to_linux_trapcode(code); #ifdef DEBUG if (ldebug(rt_sendsig)) printf(LMSG("rt_sendsig flags: 0x%x, sp: %p, ss: 0x%lx, mask: 0x%x"), frame.sf_sc.uc_stack.ss_flags, td->td_sigstk.ss_sp, td->td_sigstk.ss_size, frame.sf_sc.uc_mcontext.sc_mask); #endif if (copyout(&frame, fp, sizeof(frame)) != 0) { /* * Process has trashed its stack; give it an illegal * instruction to halt it in its tracks. */ #ifdef DEBUG if (ldebug(rt_sendsig)) printf(LMSG("rt_sendsig: bad stack %p, oonstack=%x"), fp, oonstack); #endif PROC_LOCK(p); sigexit(td, SIGILL); } /* * Build context to run handler in. */ regs->tf_rsp = PTROUT(fp); regs->tf_rip = linux32_rt_sigcode; regs->tf_rflags &= ~(PSL_T | PSL_D); regs->tf_cs = _ucode32sel; regs->tf_ss = _udatasel; regs->tf_ds = _udatasel; regs->tf_es = _udatasel; regs->tf_fs = _ufssel; regs->tf_gs = _ugssel; regs->tf_flags = TF_HASSEGS; set_pcb_flags(td->td_pcb, PCB_FULL_IRET); PROC_LOCK(p); mtx_lock(&psp->ps_mtx); } /* * Send an interrupt to process. * * Stack is set up to allow sigcode stored * in u. to call routine, followed by kcall * to sigreturn routine below. After sigreturn * resets the signal mask, the stack, and the * frame pointer, it returns to the user * specified pc, psl. */ static void linux_sendsig(sig_t catcher, ksiginfo_t *ksi, sigset_t *mask) { struct thread *td = curthread; struct proc *p = td->td_proc; struct sigacts *psp; struct trapframe *regs; struct l_sigframe *fp, frame; l_sigset_t lmask; int oonstack; int sig, code; sig = ksi->ksi_signo; code = ksi->ksi_code; PROC_LOCK_ASSERT(p, MA_OWNED); psp = p->p_sigacts; mtx_assert(&psp->ps_mtx, MA_OWNED); if (SIGISMEMBER(psp->ps_siginfo, sig)) { /* Signal handler installed with SA_SIGINFO. */ linux_rt_sendsig(catcher, ksi, mask); return; } regs = td->td_frame; oonstack = sigonstack(regs->tf_rsp); #ifdef DEBUG if (ldebug(sendsig)) printf(ARGS(sendsig, "%p, %d, %p, %u"), catcher, sig, (void*)mask, code); #endif /* * Allocate space for the signal handler context. */ if ((td->td_pflags & TDP_ALTSTACK) && !oonstack && SIGISMEMBER(psp->ps_sigonstack, sig)) { fp = (struct l_sigframe *)((uintptr_t)td->td_sigstk.ss_sp + td->td_sigstk.ss_size - sizeof(struct l_sigframe)); } else fp = (struct l_sigframe *)regs->tf_rsp - 1; mtx_unlock(&psp->ps_mtx); PROC_UNLOCK(p); /* * Build the argument list for the signal handler. */ sig = bsd_to_linux_signal(sig); bzero(&frame, sizeof(frame)); frame.sf_handler = PTROUT(catcher); frame.sf_sig = sig; bsd_to_linux_sigset(mask, &lmask); /* * Build the signal context to be used by sigreturn. */ frame.sf_sc.sc_mask = lmask.__mask; frame.sf_sc.sc_gs = regs->tf_gs; frame.sf_sc.sc_fs = regs->tf_fs; frame.sf_sc.sc_es = regs->tf_es; frame.sf_sc.sc_ds = regs->tf_ds; frame.sf_sc.sc_edi = regs->tf_rdi; frame.sf_sc.sc_esi = regs->tf_rsi; frame.sf_sc.sc_ebp = regs->tf_rbp; frame.sf_sc.sc_ebx = regs->tf_rbx; frame.sf_sc.sc_esp = regs->tf_rsp; frame.sf_sc.sc_edx = regs->tf_rdx; frame.sf_sc.sc_ecx = regs->tf_rcx; frame.sf_sc.sc_eax = regs->tf_rax; frame.sf_sc.sc_eip = regs->tf_rip; frame.sf_sc.sc_cs = regs->tf_cs; frame.sf_sc.sc_eflags = regs->tf_rflags; frame.sf_sc.sc_esp_at_signal = regs->tf_rsp; frame.sf_sc.sc_ss = regs->tf_ss; frame.sf_sc.sc_err = regs->tf_err; frame.sf_sc.sc_cr2 = (u_int32_t)(uintptr_t)ksi->ksi_addr; frame.sf_sc.sc_trapno = bsd_to_linux_trapcode(code); frame.sf_extramask[0] = lmask.__mask; if (copyout(&frame, fp, sizeof(frame)) != 0) { /* * Process has trashed its stack; give it an illegal * instruction to halt it in its tracks. */ PROC_LOCK(p); sigexit(td, SIGILL); } /* * Build context to run handler in. */ regs->tf_rsp = PTROUT(fp); regs->tf_rip = linux32_sigcode; regs->tf_rflags &= ~(PSL_T | PSL_D); regs->tf_cs = _ucode32sel; regs->tf_ss = _udatasel; regs->tf_ds = _udatasel; regs->tf_es = _udatasel; regs->tf_fs = _ufssel; regs->tf_gs = _ugssel; regs->tf_flags = TF_HASSEGS; set_pcb_flags(td->td_pcb, PCB_FULL_IRET); PROC_LOCK(p); mtx_lock(&psp->ps_mtx); } /* * System call to cleanup state after a signal * has been taken. Reset signal mask and * stack state from context left by sendsig (above). * Return to previous pc and psl as specified by * context left by sendsig. Check carefully to * make sure that the user has not modified the * psl to gain improper privileges or to cause * a machine fault. */ int linux_sigreturn(struct thread *td, struct linux_sigreturn_args *args) { struct l_sigframe frame; struct trapframe *regs; sigset_t bmask; l_sigset_t lmask; int eflags; ksiginfo_t ksi; regs = td->td_frame; #ifdef DEBUG if (ldebug(sigreturn)) printf(ARGS(sigreturn, "%p"), (void *)args->sfp); #endif /* * The trampoline code hands us the sigframe. * It is unsafe to keep track of it ourselves, in the event that a * program jumps out of a signal handler. */ if (copyin(args->sfp, &frame, sizeof(frame)) != 0) return (EFAULT); /* * Check for security violations. */ #define EFLAGS_SECURE(ef, oef) ((((ef) ^ (oef)) & ~PSL_USERCHANGE) == 0) eflags = frame.sf_sc.sc_eflags; if (!EFLAGS_SECURE(eflags, regs->tf_rflags)) return(EINVAL); /* * Don't allow users to load a valid privileged %cs. Let the * hardware check for invalid selectors, excess privilege in * other selectors, invalid %eip's and invalid %esp's. */ #define CS_SECURE(cs) (ISPL(cs) == SEL_UPL) if (!CS_SECURE(frame.sf_sc.sc_cs)) { ksiginfo_init_trap(&ksi); ksi.ksi_signo = SIGBUS; ksi.ksi_code = BUS_OBJERR; ksi.ksi_trapno = T_PROTFLT; ksi.ksi_addr = (void *)regs->tf_rip; trapsignal(td, &ksi); return(EINVAL); } lmask.__mask = frame.sf_sc.sc_mask; lmask.__mask = frame.sf_extramask[0]; linux_to_bsd_sigset(&lmask, &bmask); kern_sigprocmask(td, SIG_SETMASK, &bmask, NULL, 0); /* * Restore signal context. */ regs->tf_rdi = frame.sf_sc.sc_edi; regs->tf_rsi = frame.sf_sc.sc_esi; regs->tf_rbp = frame.sf_sc.sc_ebp; regs->tf_rbx = frame.sf_sc.sc_ebx; regs->tf_rdx = frame.sf_sc.sc_edx; regs->tf_rcx = frame.sf_sc.sc_ecx; regs->tf_rax = frame.sf_sc.sc_eax; regs->tf_rip = frame.sf_sc.sc_eip; regs->tf_cs = frame.sf_sc.sc_cs; regs->tf_ds = frame.sf_sc.sc_ds; regs->tf_es = frame.sf_sc.sc_es; regs->tf_fs = frame.sf_sc.sc_fs; regs->tf_gs = frame.sf_sc.sc_gs; regs->tf_rflags = eflags; regs->tf_rsp = frame.sf_sc.sc_esp_at_signal; regs->tf_ss = frame.sf_sc.sc_ss; set_pcb_flags(td->td_pcb, PCB_FULL_IRET); return (EJUSTRETURN); } /* * System call to cleanup state after a signal * has been taken. Reset signal mask and * stack state from context left by rt_sendsig (above). * Return to previous pc and psl as specified by * context left by sendsig. Check carefully to * make sure that the user has not modified the * psl to gain improper privileges or to cause * a machine fault. */ int linux_rt_sigreturn(struct thread *td, struct linux_rt_sigreturn_args *args) { struct l_ucontext uc; struct l_sigcontext *context; sigset_t bmask; l_stack_t *lss; stack_t ss; struct trapframe *regs; int eflags; ksiginfo_t ksi; regs = td->td_frame; #ifdef DEBUG if (ldebug(rt_sigreturn)) printf(ARGS(rt_sigreturn, "%p"), (void *)args->ucp); #endif /* * The trampoline code hands us the ucontext. * It is unsafe to keep track of it ourselves, in the event that a * program jumps out of a signal handler. */ if (copyin(args->ucp, &uc, sizeof(uc)) != 0) return (EFAULT); context = &uc.uc_mcontext; /* * Check for security violations. */ #define EFLAGS_SECURE(ef, oef) ((((ef) ^ (oef)) & ~PSL_USERCHANGE) == 0) eflags = context->sc_eflags; if (!EFLAGS_SECURE(eflags, regs->tf_rflags)) return(EINVAL); /* * Don't allow users to load a valid privileged %cs. Let the * hardware check for invalid selectors, excess privilege in * other selectors, invalid %eip's and invalid %esp's. */ #define CS_SECURE(cs) (ISPL(cs) == SEL_UPL) if (!CS_SECURE(context->sc_cs)) { ksiginfo_init_trap(&ksi); ksi.ksi_signo = SIGBUS; ksi.ksi_code = BUS_OBJERR; ksi.ksi_trapno = T_PROTFLT; ksi.ksi_addr = (void *)regs->tf_rip; trapsignal(td, &ksi); return(EINVAL); } linux_to_bsd_sigset(&uc.uc_sigmask, &bmask); kern_sigprocmask(td, SIG_SETMASK, &bmask, NULL, 0); /* * Restore signal context */ regs->tf_gs = context->sc_gs; regs->tf_fs = context->sc_fs; regs->tf_es = context->sc_es; regs->tf_ds = context->sc_ds; regs->tf_rdi = context->sc_edi; regs->tf_rsi = context->sc_esi; regs->tf_rbp = context->sc_ebp; regs->tf_rbx = context->sc_ebx; regs->tf_rdx = context->sc_edx; regs->tf_rcx = context->sc_ecx; regs->tf_rax = context->sc_eax; regs->tf_rip = context->sc_eip; regs->tf_cs = context->sc_cs; regs->tf_rflags = eflags; regs->tf_rsp = context->sc_esp_at_signal; regs->tf_ss = context->sc_ss; set_pcb_flags(td->td_pcb, PCB_FULL_IRET); /* * call sigaltstack & ignore results.. */ lss = &uc.uc_stack; ss.ss_sp = PTRIN(lss->ss_sp); ss.ss_size = lss->ss_size; ss.ss_flags = linux_to_bsd_sigaltstack(lss->ss_flags); #ifdef DEBUG if (ldebug(rt_sigreturn)) printf(LMSG("rt_sigret flags: 0x%x, sp: %p, ss: 0x%lx, mask: 0x%x"), ss.ss_flags, ss.ss_sp, ss.ss_size, context->sc_mask); #endif (void)kern_sigaltstack(td, &ss, NULL); return (EJUSTRETURN); } static int linux32_fetch_syscall_args(struct thread *td) { struct proc *p; struct trapframe *frame; struct syscall_args *sa; p = td->td_proc; frame = td->td_frame; sa = &td->td_sa; sa->args[0] = frame->tf_rbx; sa->args[1] = frame->tf_rcx; sa->args[2] = frame->tf_rdx; sa->args[3] = frame->tf_rsi; sa->args[4] = frame->tf_rdi; sa->args[5] = frame->tf_rbp; /* Unconfirmed */ sa->code = frame->tf_rax; if (sa->code >= p->p_sysent->sv_size) /* nosys */ sa->callp = &p->p_sysent->sv_table[p->p_sysent->sv_size - 1]; else sa->callp = &p->p_sysent->sv_table[sa->code]; sa->narg = sa->callp->sy_narg; td->td_retval[0] = 0; td->td_retval[1] = frame->tf_rdx; return (0); } /* * If a linux binary is exec'ing something, try this image activator * first. We override standard shell script execution in order to * be able to modify the interpreter path. We only do this if a linux * binary is doing the exec, so we do not create an EXEC module for it. */ static int exec_linux_imgact_try(struct image_params *iparams); static int exec_linux_imgact_try(struct image_params *imgp) { const char *head = (const char *)imgp->image_header; char *rpath; int error = -1; /* * The interpreter for shell scripts run from a linux binary needs * to be located in /compat/linux if possible in order to recursively * maintain linux path emulation. */ if (((const short *)head)[0] == SHELLMAGIC) { /* * Run our normal shell image activator. If it succeeds attempt * to use the alternate path for the interpreter. If an * alternate * path is found, use our stringspace to store it. */ if ((error = exec_shell_imgact(imgp)) == 0) { linux_emul_convpath(FIRST_THREAD_IN_PROC(imgp->proc), imgp->interpreter_name, UIO_SYSSPACE, &rpath, 0, AT_FDCWD); if (rpath != NULL) imgp->args->fname_buf = imgp->interpreter_name = rpath; } } return (error); } /* * Clear registers on exec * XXX copied from ia32_signal.c. */ static void exec_linux_setregs(struct thread *td, struct image_params *imgp, u_long stack) { struct trapframe *regs = td->td_frame; struct pcb *pcb = td->td_pcb; - mtx_lock(&dt_lock); if (td->td_proc->p_md.md_ldt != NULL) user_ldt_free(td); - else - mtx_unlock(&dt_lock); critical_enter(); wrmsr(MSR_FSBASE, 0); wrmsr(MSR_KGSBASE, 0); /* User value while we're in the kernel */ pcb->pcb_fsbase = 0; pcb->pcb_gsbase = 0; critical_exit(); pcb->pcb_initial_fpucw = __LINUX_NPXCW__; bzero((char *)regs, sizeof(struct trapframe)); regs->tf_rip = imgp->entry_addr; regs->tf_rsp = stack; regs->tf_rflags = PSL_USER | (regs->tf_rflags & PSL_T); regs->tf_gs = _ugssel; regs->tf_fs = _ufssel; regs->tf_es = _udatasel; regs->tf_ds = _udatasel; regs->tf_ss = _udatasel; regs->tf_flags = TF_HASSEGS; regs->tf_cs = _ucode32sel; regs->tf_rbx = imgp->ps_strings; fpstate_drop(td); /* Do full restore on return so that we can change to a different %cs */ set_pcb_flags(pcb, PCB_32BIT | PCB_FULL_IRET); td->td_retval[1] = 0; } /* * XXX copied from ia32_sysvec.c. */ static register_t * linux_copyout_strings(struct image_params *imgp) { int argc, envc; u_int32_t *vectp; char *stringp, *destp; u_int32_t *stack_base; struct linux32_ps_strings *arginfo; char canary[LINUX_AT_RANDOM_LEN]; size_t execpath_len; /* * Calculate string base and vector table pointers. */ if (imgp->execpath != NULL && imgp->auxargs != NULL) execpath_len = strlen(imgp->execpath) + 1; else execpath_len = 0; arginfo = (struct linux32_ps_strings *)LINUX32_PS_STRINGS; destp = (caddr_t)arginfo - SPARE_USRSPACE - roundup(sizeof(canary), sizeof(char *)) - roundup(execpath_len, sizeof(char *)) - roundup(ARG_MAX - imgp->args->stringspace, sizeof(char *)); if (execpath_len != 0) { imgp->execpathp = (uintptr_t)arginfo - execpath_len; copyout(imgp->execpath, (void *)imgp->execpathp, execpath_len); } /* * Prepare the canary for SSP. */ arc4rand(canary, sizeof(canary), 0); imgp->canary = (uintptr_t)arginfo - roundup(execpath_len, sizeof(char *)) - roundup(sizeof(canary), sizeof(char *)); copyout(canary, (void *)imgp->canary, sizeof(canary)); /* * If we have a valid auxargs ptr, prepare some room * on the stack. */ if (imgp->auxargs) { /* * 'AT_COUNT*2' is size for the ELF Auxargs data. This is for * lower compatibility. */ imgp->auxarg_size = (imgp->auxarg_size) ? imgp->auxarg_size : (LINUX_AT_COUNT * 2); /* * The '+ 2' is for the null pointers at the end of each of * the arg and env vector sets,and imgp->auxarg_size is room * for argument of Runtime loader. */ vectp = (u_int32_t *) (destp - (imgp->args->argc + imgp->args->envc + 2 + imgp->auxarg_size) * sizeof(u_int32_t)); } else /* * The '+ 2' is for the null pointers at the end of each of * the arg and env vector sets */ vectp = (u_int32_t *)(destp - (imgp->args->argc + imgp->args->envc + 2) * sizeof(u_int32_t)); /* * vectp also becomes our initial stack base */ stack_base = vectp; stringp = imgp->args->begin_argv; argc = imgp->args->argc; envc = imgp->args->envc; /* * Copy out strings - arguments and environment. */ copyout(stringp, destp, ARG_MAX - imgp->args->stringspace); /* * Fill in "ps_strings" struct for ps, w, etc. */ suword32(&arginfo->ps_argvstr, (uint32_t)(intptr_t)vectp); suword32(&arginfo->ps_nargvstr, argc); /* * Fill in argument portion of vector table. */ for (; argc > 0; --argc) { suword32(vectp++, (uint32_t)(intptr_t)destp); while (*stringp++ != 0) destp++; destp++; } /* a null vector table pointer separates the argp's from the envp's */ suword32(vectp++, 0); suword32(&arginfo->ps_envstr, (uint32_t)(intptr_t)vectp); suword32(&arginfo->ps_nenvstr, envc); /* * Fill in environment portion of vector table. */ for (; envc > 0; --envc) { suword32(vectp++, (uint32_t)(intptr_t)destp); while (*stringp++ != 0) destp++; destp++; } /* end of vector table is a null pointer */ suword32(vectp, 0); return ((register_t *)stack_base); } static SYSCTL_NODE(_compat, OID_AUTO, linux32, CTLFLAG_RW, 0, "32-bit Linux emulation"); static u_long linux32_maxdsiz = LINUX32_MAXDSIZ; SYSCTL_ULONG(_compat_linux32, OID_AUTO, maxdsiz, CTLFLAG_RW, &linux32_maxdsiz, 0, ""); static u_long linux32_maxssiz = LINUX32_MAXSSIZ; SYSCTL_ULONG(_compat_linux32, OID_AUTO, maxssiz, CTLFLAG_RW, &linux32_maxssiz, 0, ""); static u_long linux32_maxvmem = LINUX32_MAXVMEM; SYSCTL_ULONG(_compat_linux32, OID_AUTO, maxvmem, CTLFLAG_RW, &linux32_maxvmem, 0, ""); #if defined(DEBUG) SYSCTL_PROC(_compat_linux32, OID_AUTO, debug, CTLTYPE_STRING | CTLFLAG_RW, 0, 0, linux_sysctl_debug, "A", "Linux debugging control"); #endif static void linux32_fixlimit(struct rlimit *rl, int which) { switch (which) { case RLIMIT_DATA: if (linux32_maxdsiz != 0) { if (rl->rlim_cur > linux32_maxdsiz) rl->rlim_cur = linux32_maxdsiz; if (rl->rlim_max > linux32_maxdsiz) rl->rlim_max = linux32_maxdsiz; } break; case RLIMIT_STACK: if (linux32_maxssiz != 0) { if (rl->rlim_cur > linux32_maxssiz) rl->rlim_cur = linux32_maxssiz; if (rl->rlim_max > linux32_maxssiz) rl->rlim_max = linux32_maxssiz; } break; case RLIMIT_VMEM: if (linux32_maxvmem != 0) { if (rl->rlim_cur > linux32_maxvmem) rl->rlim_cur = linux32_maxvmem; if (rl->rlim_max > linux32_maxvmem) rl->rlim_max = linux32_maxvmem; } break; } } struct sysentvec elf_linux_sysvec = { .sv_size = LINUX32_SYS_MAXSYSCALL, .sv_table = linux32_sysent, .sv_mask = 0, .sv_errsize = ELAST + 1, .sv_errtbl = bsd_to_linux_errno, .sv_transtrap = translate_traps, .sv_fixup = elf_linux_fixup, .sv_sendsig = linux_sendsig, .sv_sigcode = &_binary_linux32_locore_o_start, .sv_szsigcode = &linux_szsigcode, .sv_name = "Linux ELF32", .sv_coredump = elf32_coredump, .sv_imgact_try = exec_linux_imgact_try, .sv_minsigstksz = LINUX_MINSIGSTKSZ, .sv_pagesize = PAGE_SIZE, .sv_minuser = VM_MIN_ADDRESS, .sv_maxuser = LINUX32_MAXUSER, .sv_usrstack = LINUX32_USRSTACK, .sv_psstrings = LINUX32_PS_STRINGS, .sv_stackprot = VM_PROT_ALL, .sv_copyout_strings = linux_copyout_strings, .sv_setregs = exec_linux_setregs, .sv_fixlimit = linux32_fixlimit, .sv_maxssiz = &linux32_maxssiz, .sv_flags = SV_ABI_LINUX | SV_ILP32 | SV_IA32 | SV_SHP, .sv_set_syscall_retval = cpu_set_syscall_retval, .sv_fetch_syscall_args = linux32_fetch_syscall_args, .sv_syscallnames = NULL, .sv_shared_page_base = LINUX32_SHAREDPAGE, .sv_shared_page_len = PAGE_SIZE, .sv_schedtail = linux_schedtail, .sv_thread_detach = linux_thread_detach, .sv_trap = NULL, }; static void linux_vdso_install(void *param) { linux_szsigcode = (&_binary_linux32_locore_o_end - &_binary_linux32_locore_o_start); if (linux_szsigcode > elf_linux_sysvec.sv_shared_page_len) panic("Linux invalid vdso size\n"); __elfN(linux_vdso_fixup)(&elf_linux_sysvec); linux_shared_page_obj = __elfN(linux_shared_page_init) (&linux_shared_page_mapping); __elfN(linux_vdso_reloc)(&elf_linux_sysvec); bcopy(elf_linux_sysvec.sv_sigcode, linux_shared_page_mapping, linux_szsigcode); elf_linux_sysvec.sv_shared_page_obj = linux_shared_page_obj; linux_kplatform = linux_shared_page_mapping + (linux_platform - (caddr_t)elf_linux_sysvec.sv_shared_page_base); } SYSINIT(elf_linux_vdso_init, SI_SUB_EXEC, SI_ORDER_ANY, (sysinit_cfunc_t)linux_vdso_install, NULL); static void linux_vdso_deinstall(void *param) { __elfN(linux_shared_page_fini)(linux_shared_page_obj); }; SYSUNINIT(elf_linux_vdso_uninit, SI_SUB_EXEC, SI_ORDER_FIRST, (sysinit_cfunc_t)linux_vdso_deinstall, NULL); static char GNU_ABI_VENDOR[] = "GNU"; static int GNULINUX_ABI_DESC = 0; static boolean_t linux32_trans_osrel(const Elf_Note *note, int32_t *osrel) { const Elf32_Word *desc; uintptr_t p; p = (uintptr_t)(note + 1); p += roundup2(note->n_namesz, sizeof(Elf32_Addr)); desc = (const Elf32_Word *)p; if (desc[0] != GNULINUX_ABI_DESC) return (FALSE); /* * For linux we encode osrel as follows (see linux_mib.c): * VVVMMMIII (version, major, minor), see linux_mib.c. */ *osrel = desc[1] * 1000000 + desc[2] * 1000 + desc[3]; return (TRUE); } static Elf_Brandnote linux32_brandnote = { .hdr.n_namesz = sizeof(GNU_ABI_VENDOR), .hdr.n_descsz = 16, /* XXX at least 16 */ .hdr.n_type = 1, .vendor = GNU_ABI_VENDOR, .flags = BN_TRANSLATE_OSREL, .trans_osrel = linux32_trans_osrel }; static Elf32_Brandinfo linux_brand = { .brand = ELFOSABI_LINUX, .machine = EM_386, .compat_3_brand = "Linux", .emul_path = "/compat/linux", .interp_path = "/lib/ld-linux.so.1", .sysvec = &elf_linux_sysvec, .interp_newpath = NULL, .brand_note = &linux32_brandnote, .flags = BI_CAN_EXEC_DYN | BI_BRAND_NOTE }; static Elf32_Brandinfo linux_glibc2brand = { .brand = ELFOSABI_LINUX, .machine = EM_386, .compat_3_brand = "Linux", .emul_path = "/compat/linux", .interp_path = "/lib/ld-linux.so.2", .sysvec = &elf_linux_sysvec, .interp_newpath = NULL, .brand_note = &linux32_brandnote, .flags = BI_CAN_EXEC_DYN | BI_BRAND_NOTE }; static Elf32_Brandinfo linux_muslbrand = { .brand = ELFOSABI_LINUX, .machine = EM_386, .compat_3_brand = "Linux", .emul_path = "/compat/linux", .interp_path = "/lib/ld-musl-i386.so.1", .sysvec = &elf_linux_sysvec, .interp_newpath = NULL, .brand_note = &linux32_brandnote, .flags = BI_CAN_EXEC_DYN | BI_BRAND_NOTE }; Elf32_Brandinfo *linux_brandlist[] = { &linux_brand, &linux_glibc2brand, &linux_muslbrand, NULL }; static int linux_elf_modevent(module_t mod, int type, void *data) { Elf32_Brandinfo **brandinfo; int error; struct linux_ioctl_handler **lihp; error = 0; switch(type) { case MOD_LOAD: for (brandinfo = &linux_brandlist[0]; *brandinfo != NULL; ++brandinfo) if (elf32_insert_brand_entry(*brandinfo) < 0) error = EINVAL; if (error == 0) { SET_FOREACH(lihp, linux_ioctl_handler_set) linux_ioctl_register_handler(*lihp); LIST_INIT(&futex_list); mtx_init(&futex_mtx, "ftllk", NULL, MTX_DEF); stclohz = (stathz ? stathz : hz); if (bootverbose) printf("Linux ELF exec handler installed\n"); } else printf("cannot insert Linux ELF brand handler\n"); break; case MOD_UNLOAD: for (brandinfo = &linux_brandlist[0]; *brandinfo != NULL; ++brandinfo) if (elf32_brand_inuse(*brandinfo)) error = EBUSY; if (error == 0) { for (brandinfo = &linux_brandlist[0]; *brandinfo != NULL; ++brandinfo) if (elf32_remove_brand_entry(*brandinfo) < 0) error = EINVAL; } if (error == 0) { SET_FOREACH(lihp, linux_ioctl_handler_set) linux_ioctl_unregister_handler(*lihp); mtx_destroy(&futex_mtx); if (bootverbose) printf("Linux ELF exec handler removed\n"); } else printf("Could not deinstall ELF interpreter entry\n"); break; default: return (EOPNOTSUPP); } return (error); } static moduledata_t linux_elf_mod = { "linuxelf", linux_elf_modevent, 0 }; DECLARE_MODULE_TIED(linuxelf, linux_elf_mod, SI_SUB_EXEC, SI_ORDER_ANY); MODULE_DEPEND(linuxelf, linux_common, 1, 1, 1); FEATURE(linux, "Linux 32bit support");