diff --git a/sys/arm64/arm64/trap.c b/sys/arm64/arm64/trap.c index 891f1024232a..2b357d723e15 100644 --- a/sys/arm64/arm64/trap.c +++ b/sys/arm64/arm64/trap.c @@ -1,663 +1,663 @@ /*- * Copyright (c) 2014 Andrew Turner * 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. * * THIS SOFTWARE IS PROVIDED BY THE AUTHOR 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 AUTHOR 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 "opt_ddb.h" #include __FBSDID("$FreeBSD$"); #include #include #include #include #include #include #include #include #include #include #ifdef KDB #include #endif #include #include #include #include #include #include #include #include #include #include #include #ifdef KDTRACE_HOOKS #include #endif #ifdef VFP #include #endif #ifdef KDB #include #endif #ifdef DDB #include #include #endif /* Called from exception.S */ void do_el1h_sync(struct thread *, struct trapframe *); void do_el0_sync(struct thread *, struct trapframe *); void do_el0_error(struct trapframe *); void do_serror(struct trapframe *); void unhandled_exception(struct trapframe *); static void print_gp_register(const char *name, uint64_t value); static void print_registers(struct trapframe *frame); int (*dtrace_invop_jump_addr)(struct trapframe *); typedef void (abort_handler)(struct thread *, struct trapframe *, uint64_t, uint64_t, int); static abort_handler align_abort; static abort_handler data_abort; static abort_handler external_abort; static abort_handler *abort_handlers[] = { [ISS_DATA_DFSC_TF_L0] = data_abort, [ISS_DATA_DFSC_TF_L1] = data_abort, [ISS_DATA_DFSC_TF_L2] = data_abort, [ISS_DATA_DFSC_TF_L3] = data_abort, [ISS_DATA_DFSC_AFF_L1] = data_abort, [ISS_DATA_DFSC_AFF_L2] = data_abort, [ISS_DATA_DFSC_AFF_L3] = data_abort, [ISS_DATA_DFSC_PF_L1] = data_abort, [ISS_DATA_DFSC_PF_L2] = data_abort, [ISS_DATA_DFSC_PF_L3] = data_abort, [ISS_DATA_DFSC_ALIGN] = align_abort, [ISS_DATA_DFSC_EXT] = external_abort, [ISS_DATA_DFSC_EXT_L0] = external_abort, [ISS_DATA_DFSC_EXT_L1] = external_abort, [ISS_DATA_DFSC_EXT_L2] = external_abort, [ISS_DATA_DFSC_EXT_L3] = external_abort, [ISS_DATA_DFSC_ECC] = external_abort, [ISS_DATA_DFSC_ECC_L0] = external_abort, [ISS_DATA_DFSC_ECC_L1] = external_abort, [ISS_DATA_DFSC_ECC_L2] = external_abort, [ISS_DATA_DFSC_ECC_L3] = external_abort, }; static __inline void call_trapsignal(struct thread *td, int sig, int code, void *addr, int trapno) { ksiginfo_t ksi; ksiginfo_init_trap(&ksi); ksi.ksi_signo = sig; ksi.ksi_code = code; ksi.ksi_addr = addr; ksi.ksi_trapno = trapno; trapsignal(td, &ksi); } int cpu_fetch_syscall_args(struct thread *td) { struct proc *p; register_t *ap, *dst_ap; struct syscall_args *sa; p = td->td_proc; sa = &td->td_sa; ap = td->td_frame->tf_x; dst_ap = &sa->args[0]; sa->code = td->td_frame->tf_x[8]; sa->original_code = sa->code; if (__predict_false(sa->code == SYS_syscall || sa->code == SYS___syscall)) { sa->code = *ap++; } else { *dst_ap++ = *ap++; } if (__predict_false(sa->code >= p->p_sysent->sv_size)) sa->callp = &p->p_sysent->sv_table[0]; else sa->callp = &p->p_sysent->sv_table[sa->code]; KASSERT(sa->callp->sy_narg <= nitems(sa->args), ("Syscall %d takes too many arguments", sa->code)); - memcpy(dst_ap, ap, (MAXARGS - 1) * sizeof(register_t)); + memcpy(dst_ap, ap, (nitems(sa->args) - 1) * sizeof(register_t)); td->td_retval[0] = 0; td->td_retval[1] = 0; return (0); } #include "../../kern/subr_syscall.c" /* * Test for fault generated by given access instruction in * bus_peek_ or bus_poke_ bus function. */ extern uint32_t generic_bs_peek_1f, generic_bs_peek_2f; extern uint32_t generic_bs_peek_4f, generic_bs_peek_8f; extern uint32_t generic_bs_poke_1f, generic_bs_poke_2f; extern uint32_t generic_bs_poke_4f, generic_bs_poke_8f; static bool test_bs_fault(void *addr) { return (addr == &generic_bs_peek_1f || addr == &generic_bs_peek_2f || addr == &generic_bs_peek_4f || addr == &generic_bs_peek_8f || addr == &generic_bs_poke_1f || addr == &generic_bs_poke_2f || addr == &generic_bs_poke_4f || addr == &generic_bs_poke_8f); } static void svc_handler(struct thread *td, struct trapframe *frame) { if ((frame->tf_esr & ESR_ELx_ISS_MASK) == 0) { syscallenter(td); syscallret(td); } else { call_trapsignal(td, SIGILL, ILL_ILLOPN, (void *)frame->tf_elr, ESR_ELx_EXCEPTION(frame->tf_esr)); userret(td, frame); } } static void align_abort(struct thread *td, struct trapframe *frame, uint64_t esr, uint64_t far, int lower) { if (!lower) { print_registers(frame); print_gp_register("far", far); printf(" esr: %.8lx\n", esr); panic("Misaligned access from kernel space!"); } call_trapsignal(td, SIGBUS, BUS_ADRALN, (void *)frame->tf_elr, ESR_ELx_EXCEPTION(frame->tf_esr)); userret(td, frame); } static void external_abort(struct thread *td, struct trapframe *frame, uint64_t esr, uint64_t far, int lower) { /* * Try to handle synchronous external aborts caused by * bus_space_peek() and/or bus_space_poke() functions. */ if (!lower && test_bs_fault((void *)frame->tf_elr)) { frame->tf_elr = (uint64_t)generic_bs_fault; return; } print_registers(frame); print_gp_register("far", far); panic("Unhandled EL%d external data abort", lower ? 0: 1); } static void data_abort(struct thread *td, struct trapframe *frame, uint64_t esr, uint64_t far, int lower) { struct vm_map *map; struct proc *p; struct pcb *pcb; vm_prot_t ftype; int error, sig, ucode; #ifdef KDB bool handled; #endif /* * According to the ARMv8-A rev. A.g, B2.10.5 "Load-Exclusive * and Store-Exclusive instruction usage restrictions", state * of the exclusive monitors after data abort exception is unknown. */ clrex(); #ifdef KDB if (kdb_active) { kdb_reenter(); return; } #endif pcb = td->td_pcb; p = td->td_proc; if (lower) map = &p->p_vmspace->vm_map; else { intr_enable(); /* We received a TBI/PAC/etc. fault from the kernel */ if (!ADDR_IS_CANONICAL(far)) { error = KERN_INVALID_ADDRESS; goto bad_far; } /* The top bit tells us which range to use */ if (ADDR_IS_KERNEL(far)) { map = kernel_map; } else { map = &p->p_vmspace->vm_map; if (map == NULL) map = kernel_map; } } /* * Try to handle translation, access flag, and permission faults. * Translation faults may occur as a result of the required * break-before-make sequence used when promoting or demoting * superpages. Such faults must not occur while holding the pmap lock, * or pmap_fault() will recurse on that lock. */ if ((lower || map == kernel_map || pcb->pcb_onfault != 0) && pmap_fault(map->pmap, esr, far) == KERN_SUCCESS) return; KASSERT(td->td_md.md_spinlock_count == 0, ("data abort with spinlock held")); if (td->td_critnest != 0 || WITNESS_CHECK(WARN_SLEEPOK | WARN_GIANTOK, NULL, "Kernel page fault") != 0) { print_registers(frame); print_gp_register("far", far); printf(" esr: %.8lx\n", esr); panic("data abort in critical section or under mutex"); } switch (ESR_ELx_EXCEPTION(esr)) { case EXCP_INSN_ABORT: case EXCP_INSN_ABORT_L: ftype = VM_PROT_EXECUTE; break; default: ftype = (esr & ISS_DATA_WnR) == 0 ? VM_PROT_READ : VM_PROT_WRITE; break; } /* Fault in the page. */ error = vm_fault_trap(map, far, ftype, VM_FAULT_NORMAL, &sig, &ucode); if (error != KERN_SUCCESS) { bad_far: if (lower) { call_trapsignal(td, sig, ucode, (void *)far, ESR_ELx_EXCEPTION(esr)); } else { if (td->td_intr_nesting_level == 0 && pcb->pcb_onfault != 0) { frame->tf_x[0] = error; frame->tf_elr = pcb->pcb_onfault; return; } printf("Fatal data abort:\n"); print_registers(frame); print_gp_register("far", far); printf(" esr: %.8lx\n", esr); #ifdef KDB if (debugger_on_trap) { kdb_why = KDB_WHY_TRAP; handled = kdb_trap(ESR_ELx_EXCEPTION(esr), 0, frame); kdb_why = KDB_WHY_UNSET; if (handled) return; } #endif panic("vm_fault failed: %lx error %d", frame->tf_elr, error); } } if (lower) userret(td, frame); } static void print_gp_register(const char *name, uint64_t value) { #if defined(DDB) c_db_sym_t sym; const char *sym_name; db_expr_t sym_value; db_expr_t offset; #endif printf(" %s: %16lx", name, value); #if defined(DDB) /* If this looks like a kernel address try to find the symbol */ if (value >= VM_MIN_KERNEL_ADDRESS) { sym = db_search_symbol(value, DB_STGY_ANY, &offset); if (sym != C_DB_SYM_NULL) { db_symbol_values(sym, &sym_name, &sym_value); printf(" (%s + %lx)", sym_name, offset); } } #endif printf("\n"); } static void print_registers(struct trapframe *frame) { char name[4]; u_int reg; for (reg = 0; reg < nitems(frame->tf_x); reg++) { snprintf(name, sizeof(name), "%sx%d", (reg < 10) ? " " : "", reg); print_gp_register(name, frame->tf_x[reg]); } printf(" sp: %16lx\n", frame->tf_sp); print_gp_register(" lr", frame->tf_lr); print_gp_register("elr", frame->tf_elr); printf("spsr: %8x\n", frame->tf_spsr); } void do_el1h_sync(struct thread *td, struct trapframe *frame) { uint32_t exception; uint64_t esr, far; int dfsc; /* Read the esr register to get the exception details */ esr = frame->tf_esr; exception = ESR_ELx_EXCEPTION(esr); #ifdef KDTRACE_HOOKS if (dtrace_trap_func != NULL && (*dtrace_trap_func)(frame, exception)) return; #endif CTR4(KTR_TRAP, "do_el1_sync: curthread: %p, esr %lx, elr: %lx, frame: %p", td, esr, frame->tf_elr, frame); /* * Enable debug exceptions if we aren't already handling one. They will * be masked again in the exception handler's epilogue. */ if (exception != EXCP_BRK && exception != EXCP_WATCHPT_EL1 && exception != EXCP_SOFTSTP_EL1) dbg_enable(); switch (exception) { case EXCP_FP_SIMD: case EXCP_TRAP_FP: #ifdef VFP if ((td->td_pcb->pcb_fpflags & PCB_FP_KERN) != 0) { vfp_restore_state(); } else #endif { print_registers(frame); printf(" esr: %.8lx\n", esr); panic("VFP exception in the kernel"); } break; case EXCP_INSN_ABORT: case EXCP_DATA_ABORT: far = READ_SPECIALREG(far_el1); dfsc = esr & ISS_DATA_DFSC_MASK; if (dfsc < nitems(abort_handlers) && abort_handlers[dfsc] != NULL) { abort_handlers[dfsc](td, frame, esr, far, 0); } else { print_registers(frame); print_gp_register("far", far); printf(" esr: %.8lx\n", esr); panic("Unhandled EL1 %s abort: %x", exception == EXCP_INSN_ABORT ? "instruction" : "data", dfsc); } break; case EXCP_BRK: #ifdef KDTRACE_HOOKS if ((esr & ESR_ELx_ISS_MASK) == 0x40d && \ dtrace_invop_jump_addr != 0) { dtrace_invop_jump_addr(frame); break; } #endif #ifdef KDB kdb_trap(exception, 0, frame); #else panic("No debugger in kernel."); #endif break; case EXCP_WATCHPT_EL1: case EXCP_SOFTSTP_EL1: #ifdef KDB kdb_trap(exception, 0, frame); #else panic("No debugger in kernel."); #endif break; case EXCP_UNKNOWN: if (undef_insn(1, frame)) break; /* FALLTHROUGH */ default: print_registers(frame); print_gp_register("far", READ_SPECIALREG(far_el1)); panic("Unknown kernel exception %x esr_el1 %lx", exception, esr); } } void do_el0_sync(struct thread *td, struct trapframe *frame) { pcpu_bp_harden bp_harden; uint32_t exception; uint64_t esr, far; int dfsc; /* Check we have a sane environment when entering from userland */ KASSERT((uintptr_t)get_pcpu() >= VM_MIN_KERNEL_ADDRESS, ("Invalid pcpu address from userland: %p (tpidr %lx)", get_pcpu(), READ_SPECIALREG(tpidr_el1))); esr = frame->tf_esr; exception = ESR_ELx_EXCEPTION(esr); switch (exception) { case EXCP_INSN_ABORT_L: far = READ_SPECIALREG(far_el1); /* * Userspace may be trying to train the branch predictor to * attack the kernel. If we are on a CPU affected by this * call the handler to clear the branch predictor state. */ if (far > VM_MAXUSER_ADDRESS) { bp_harden = PCPU_GET(bp_harden); if (bp_harden != NULL) bp_harden(); } break; case EXCP_UNKNOWN: case EXCP_DATA_ABORT_L: case EXCP_DATA_ABORT: case EXCP_WATCHPT_EL0: far = READ_SPECIALREG(far_el1); break; } intr_enable(); CTR4(KTR_TRAP, "do_el0_sync: curthread: %p, esr %lx, elr: %lx, frame: %p", td, esr, frame->tf_elr, frame); switch (exception) { case EXCP_FP_SIMD: case EXCP_TRAP_FP: #ifdef VFP vfp_restore_state(); #else panic("VFP exception in userland"); #endif break; case EXCP_SVC32: case EXCP_SVC64: svc_handler(td, frame); break; case EXCP_INSN_ABORT_L: case EXCP_DATA_ABORT_L: case EXCP_DATA_ABORT: dfsc = esr & ISS_DATA_DFSC_MASK; if (dfsc < nitems(abort_handlers) && abort_handlers[dfsc] != NULL) abort_handlers[dfsc](td, frame, esr, far, 1); else { print_registers(frame); print_gp_register("far", far); printf(" esr: %.8lx\n", esr); panic("Unhandled EL0 %s abort: %x", exception == EXCP_INSN_ABORT_L ? "instruction" : "data", dfsc); } break; case EXCP_UNKNOWN: if (!undef_insn(0, frame)) call_trapsignal(td, SIGILL, ILL_ILLTRP, (void *)far, exception); userret(td, frame); break; case EXCP_SP_ALIGN: call_trapsignal(td, SIGBUS, BUS_ADRALN, (void *)frame->tf_sp, exception); userret(td, frame); break; case EXCP_PC_ALIGN: call_trapsignal(td, SIGBUS, BUS_ADRALN, (void *)frame->tf_elr, exception); userret(td, frame); break; case EXCP_BRKPT_EL0: case EXCP_BRK: #ifdef COMPAT_FREEBSD32 case EXCP_BRKPT_32: #endif /* COMPAT_FREEBSD32 */ call_trapsignal(td, SIGTRAP, TRAP_BRKPT, (void *)frame->tf_elr, exception); userret(td, frame); break; case EXCP_WATCHPT_EL0: call_trapsignal(td, SIGTRAP, TRAP_TRACE, (void *)far, exception); userret(td, frame); break; case EXCP_MSR: /* * The CPU can raise EXCP_MSR when userspace executes an mrs * instruction to access a special register userspace doesn't * have access to. */ if (!undef_insn(0, frame)) call_trapsignal(td, SIGILL, ILL_PRVOPC, (void *)frame->tf_elr, exception); userret(td, frame); break; case EXCP_SOFTSTP_EL0: td->td_frame->tf_spsr &= ~PSR_SS; td->td_pcb->pcb_flags &= ~PCB_SINGLE_STEP; WRITE_SPECIALREG(mdscr_el1, READ_SPECIALREG(mdscr_el1) & ~DBG_MDSCR_SS); call_trapsignal(td, SIGTRAP, TRAP_TRACE, (void *)frame->tf_elr, exception); userret(td, frame); break; default: call_trapsignal(td, SIGBUS, BUS_OBJERR, (void *)frame->tf_elr, exception); userret(td, frame); break; } KASSERT((td->td_pcb->pcb_fpflags & ~PCB_FP_USERMASK) == 0, ("Kernel VFP flags set while entering userspace")); KASSERT( td->td_pcb->pcb_fpusaved == &td->td_pcb->pcb_fpustate, ("Kernel VFP state in use when entering userspace")); } /* * TODO: We will need to handle these later when we support ARMv8.2 RAS. */ void do_serror(struct trapframe *frame) { uint64_t esr, far; far = READ_SPECIALREG(far_el1); esr = frame->tf_esr; print_registers(frame); print_gp_register("far", far); printf(" esr: %.8lx\n", esr); panic("Unhandled System Error"); } void unhandled_exception(struct trapframe *frame) { uint64_t esr, far; far = READ_SPECIALREG(far_el1); esr = frame->tf_esr; print_registers(frame); print_gp_register("far", far); printf(" esr: %.8lx\n", esr); panic("Unhandled exception"); } diff --git a/sys/arm64/linux/linux_sysvec.c b/sys/arm64/linux/linux_sysvec.c index c88442a19c53..a63c82b38c73 100644 --- a/sys/arm64/linux/linux_sysvec.c +++ b/sys/arm64/linux/linux_sysvec.c @@ -1,772 +1,773 @@ /*- * SPDX-License-Identifier: BSD-2-Clause-FreeBSD * * Copyright (c) 1994-1996 Søren Schmidt * Copyright (c) 2018 Turing Robotic Industries Inc. * * 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. * * THIS SOFTWARE IS PROVIDED BY THE AUTHOR 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 AUTHOR 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 #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 VFP #include #endif MODULE_VERSION(linux64elf, 1); #define LINUX_VDSOPAGE_SIZE PAGE_SIZE * 2 #define LINUX_VDSOPAGE (VM_MAXUSER_ADDRESS - \ LINUX_VDSOPAGE_SIZE) #define LINUX_SHAREDPAGE (LINUX_VDSOPAGE - PAGE_SIZE) /* * PAGE_SIZE - the size * of the native SHAREDPAGE */ #define LINUX_USRSTACK LINUX_SHAREDPAGE #define LINUX_PS_STRINGS (LINUX_USRSTACK - \ sizeof(struct ps_strings)) static int linux_szsigcode; static vm_object_t linux_vdso_obj; static char *linux_vdso_mapping; extern char _binary_linux_vdso_so_o_start; extern char _binary_linux_vdso_so_o_end; static vm_offset_t linux_vdso_base; extern struct sysent linux_sysent[LINUX_SYS_MAXSYSCALL]; SET_DECLARE(linux_ioctl_handler_set, struct linux_ioctl_handler); static int linux_copyout_strings(struct image_params *imgp, uintptr_t *stack_base); static int linux_elf_fixup(uintptr_t *stack_base, struct image_params *iparams); static bool linux_trans_osrel(const Elf_Note *note, int32_t *osrel); static void linux_vdso_install(const void *param); static void linux_vdso_deinstall(const void *param); static void linux_vdso_reloc(char *mapping, Elf_Addr offset); 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, uintptr_t stack); static void linux_exec_sysvec_init(void *param); static int linux_on_exec_vmspace(struct proc *p, struct image_params *imgp); /* DTrace init */ LIN_SDT_PROVIDER_DECLARE(LINUX_DTRACE); /* DTrace probes */ LIN_SDT_PROBE_DEFINE2(sysvec, linux_translate_traps, todo, "int", "int"); LIN_SDT_PROBE_DEFINE0(sysvec, linux_exec_setregs, todo); LIN_SDT_PROBE_DEFINE0(sysvec, linux_copyout_auxargs, todo); LIN_SDT_PROBE_DEFINE0(sysvec, linux_elf_fixup, todo); LIN_SDT_PROBE_DEFINE0(sysvec, linux_rt_sigreturn, todo); LIN_SDT_PROBE_DEFINE0(sysvec, linux_rt_sendsig, todo); LIN_SDT_PROBE_DEFINE0(sysvec, linux_vdso_install, todo); LIN_SDT_PROBE_DEFINE0(sysvec, linux_vdso_deinstall, todo); LINUX_VDSO_SYM_CHAR(linux_platform); LINUX_VDSO_SYM_INTPTR(kern_timekeep_base); LINUX_VDSO_SYM_INTPTR(__kernel_rt_sigreturn); /* LINUXTODO: do we have traps to translate? */ static int linux_translate_traps(int signal, int trap_code) { LIN_SDT_PROBE2(sysvec, linux_translate_traps, todo, signal, trap_code); return (signal); } static int linux_fetch_syscall_args(struct thread *td) { struct proc *p; struct syscall_args *sa; register_t *ap; p = td->td_proc; ap = td->td_frame->tf_x; sa = &td->td_sa; sa->code = td->td_frame->tf_x[8]; sa->original_code = sa->code; /* LINUXTODO: generic syscall? */ if (sa->code >= p->p_sysent->sv_size) sa->callp = &p->p_sysent->sv_table[0]; else sa->callp = &p->p_sysent->sv_table[sa->code]; - if (sa->callp->sy_narg > MAXARGS) - panic("ARM64TODO: Could we have more than %d args?", MAXARGS); - memcpy(sa->args, ap, MAXARGS * sizeof(register_t)); + if (sa->callp->sy_narg > nitems(sa->args)) + panic("ARM64TODO: Could we have more than %zu args?", + nitems(sa->args)); + memcpy(sa->args, ap, nitems(sa->args) * sizeof(register_t)); td->td_retval[0] = 0; return (0); } static void linux_set_syscall_retval(struct thread *td, int error) { td->td_retval[1] = td->td_frame->tf_x[1]; cpu_set_syscall_retval(td, error); if (__predict_false(error != 0)) { if (error != ERESTART && error != EJUSTRETURN) td->td_frame->tf_x[0] = bsd_to_linux_errno(error); } } static int linux_copyout_auxargs(struct image_params *imgp, uintptr_t base) { Elf_Auxargs *args; Elf_Auxinfo *argarray, *pos; struct proc *p; int error, issetugid; LIN_SDT_PROBE0(sysvec, linux_copyout_auxargs, todo); p = imgp->proc; args = (Elf64_Auxargs *)imgp->auxargs; argarray = pos = malloc(LINUX_AT_COUNT * sizeof(*pos), M_TEMP, M_WAITOK | M_ZERO); issetugid = p->p_flag & P_SUGID ? 1 : 0; AUXARGS_ENTRY(pos, LINUX_AT_SYSINFO_EHDR, linux_vdso_base); AUXARGS_ENTRY(pos, LINUX_AT_HWCAP, *imgp->sysent->sv_hwcap); AUXARGS_ENTRY(pos, AT_PAGESZ, args->pagesz); 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_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_PTR(pos, LINUX_AT_RANDOM, imgp->canary); AUXARGS_ENTRY(pos, LINUX_AT_HWCAP2, *imgp->sysent->sv_hwcap2); if (imgp->execpathp != 0) AUXARGS_ENTRY_PTR(pos, LINUX_AT_EXECFN, imgp->execpathp); if (args->execfd != -1) AUXARGS_ENTRY(pos, AT_EXECFD, args->execfd); AUXARGS_ENTRY(pos, LINUX_AT_PLATFORM, PTROUT(linux_platform)); AUXARGS_ENTRY(pos, AT_NULL, 0); free(imgp->auxargs, M_TEMP); imgp->auxargs = NULL; KASSERT(pos - argarray <= LINUX_AT_COUNT, ("Too many auxargs")); error = copyout(argarray, (void *)base, sizeof(*argarray) * LINUX_AT_COUNT); free(argarray, M_TEMP); return (error); } static int linux_elf_fixup(uintptr_t *stack_base, struct image_params *imgp) { LIN_SDT_PROBE0(sysvec, linux_elf_fixup, todo); 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. * LINUXTODO: deduplicate against other linuxulator archs */ static int linux_copyout_strings(struct image_params *imgp, uintptr_t *stack_base) { char **vectp; char *stringp; uintptr_t destp, ustringp; struct ps_strings *arginfo; char canary[LINUX_AT_RANDOM_LEN]; size_t execpath_len; struct proc *p; int argc, envc, error; /* 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 = (uintptr_t)arginfo; if (execpath_len != 0) { destp -= execpath_len; destp = rounddown2(destp, sizeof(void *)); imgp->execpathp = (void *)destp; error = copyout(imgp->execpath, imgp->execpathp, execpath_len); if (error != 0) return (error); } /* Prepare the canary for SSP. */ arc4rand(canary, sizeof(canary), 0); destp -= roundup(sizeof(canary), sizeof(void *)); imgp->canary = (void *)destp; error = copyout(canary, imgp->canary, sizeof(canary)); if (error != 0) return (error); /* Allocate room for the argument and environment strings. */ destp -= ARG_MAX - imgp->args->stringspace; destp = rounddown2(destp, sizeof(void *)); ustringp = destp; if (imgp->auxargs) { /* * Allocate room on the stack for the ELF auxargs * array. It has up to LINUX_AT_COUNT entries. */ destp -= LINUX_AT_COUNT * sizeof(Elf64_Auxinfo); destp = rounddown2(destp, sizeof(void *)); } vectp = (char **)destp; /* * Allocate room for argc and the argv[] and env vectors including the * terminating NULL pointers. */ vectp -= 1 + imgp->args->argc + 1 + imgp->args->envc + 1; vectp = (char **)STACKALIGN(vectp); /* vectp also becomes our initial stack base. */ *stack_base = (uintptr_t)vectp; stringp = imgp->args->begin_argv; argc = imgp->args->argc; envc = imgp->args->envc; /* Copy out strings - arguments and environment. */ error = copyout(stringp, (void *)ustringp, ARG_MAX - imgp->args->stringspace); if (error != 0) return (error); /* Fill in "ps_strings" struct for ps, w, etc. */ if (suword(&arginfo->ps_argvstr, (long)(intptr_t)vectp) != 0 || suword(&arginfo->ps_nargvstr, argc) != 0) return (EFAULT); if (suword(vectp++, argc) != 0) return (EFAULT); /* Fill in argument portion of vector table. */ for (; argc > 0; --argc) { if (suword(vectp++, ustringp) != 0) return (EFAULT); while (*stringp++ != 0) ustringp++; ustringp++; } /* A null vector table pointer separates the argp's from the envp's. */ if (suword(vectp++, 0) != 0) return (EFAULT); if (suword(&arginfo->ps_envstr, (long)(intptr_t)vectp) != 0 || suword(&arginfo->ps_nenvstr, envc) != 0) return (EFAULT); /* Fill in environment portion of vector table. */ for (; envc > 0; --envc) { if (suword(vectp++, ustringp) != 0) return (EFAULT); while (*stringp++ != 0) ustringp++; ustringp++; } /* The end of the vector table is a null pointer. */ if (suword(vectp, 0) != 0) return (EFAULT); if (imgp->auxargs) { vectp++; error = imgp->sysent->sv_copyout_auxargs(imgp, (uintptr_t)vectp); if (error != 0) return (error); } return (0); } /* * Reset registers to default values on exec. */ static void linux_exec_setregs(struct thread *td, struct image_params *imgp, uintptr_t stack) { struct trapframe *regs = td->td_frame; struct pcb *pcb = td->td_pcb; /* LINUXTODO: validate */ LIN_SDT_PROBE0(sysvec, linux_exec_setregs, todo); memset(regs, 0, sizeof(*regs)); /* glibc start.S registers function pointer in x0 with atexit. */ regs->tf_sp = stack; #if 0 /* LINUXTODO: See if this is used. */ regs->tf_lr = imgp->entry_addr; #else regs->tf_lr = 0xffffffffffffffff; #endif regs->tf_elr = imgp->entry_addr; pcb->pcb_tpidr_el0 = 0; pcb->pcb_tpidrro_el0 = 0; WRITE_SPECIALREG(tpidrro_el0, 0); WRITE_SPECIALREG(tpidr_el0, 0); #ifdef VFP vfp_reset_state(td, pcb); #endif /* * Clear debug register state. It is not applicable to the new process. */ bzero(&pcb->pcb_dbg_regs, sizeof(pcb->pcb_dbg_regs)); } int linux_rt_sigreturn(struct thread *td, struct linux_rt_sigreturn_args *args) { struct l_sigframe frame; struct trapframe *tf; int error; tf = td->td_frame; if (copyin((void *)tf->tf_sp, &frame, sizeof(frame))) return (EFAULT); error = set_mcontext(td, &frame.sf_uc.uc_mcontext); if (error != 0) return (error); /* Restore signal mask. */ kern_sigprocmask(td, SIG_SETMASK, &frame.sf_uc.uc_sigmask, NULL, 0); return (EJUSTRETURN); } static void linux_rt_sendsig(sig_t catcher, ksiginfo_t *ksi, sigset_t *mask) { struct thread *td; struct proc *p; struct trapframe *tf; struct l_sigframe *fp, frame; struct sigacts *psp; int onstack, sig; 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); tf = td->td_frame; onstack = sigonstack(tf->tf_sp); CTR4(KTR_SIG, "sendsig: td=%p (%s) catcher=%p sig=%d", td, p->p_comm, catcher, sig); /* Allocate and validate space for the signal handler context. */ if ((td->td_pflags & TDP_ALTSTACK) != 0 && !onstack && SIGISMEMBER(psp->ps_sigonstack, sig)) { fp = (struct l_sigframe *)((uintptr_t)td->td_sigstk.ss_sp + td->td_sigstk.ss_size); #if defined(COMPAT_43) td->td_sigstk.ss_flags |= SS_ONSTACK; #endif } else { fp = (struct l_sigframe *)td->td_frame->tf_sp; } /* Make room, keeping the stack aligned */ fp--; fp = (struct l_sigframe *)STACKALIGN(fp); /* Fill in the frame to copy out */ bzero(&frame, sizeof(frame)); get_mcontext(td, &frame.sf_uc.uc_mcontext, 0); /* Translate the signal. */ sig = bsd_to_linux_signal(sig); siginfo_to_lsiginfo(&ksi->ksi_info, &frame.sf_si, sig); frame.sf_uc.uc_sigmask = *mask; frame.sf_uc.uc_stack = td->td_sigstk; frame.sf_uc.uc_stack.ss_flags = (td->td_pflags & TDP_ALTSTACK) != 0 ? (onstack ? SS_ONSTACK : 0) : SS_DISABLE; mtx_unlock(&psp->ps_mtx); PROC_UNLOCK(td->td_proc); /* Copy the sigframe out to the user's stack. */ if (copyout(&frame, fp, sizeof(*fp)) != 0) { /* Process has trashed its stack. Kill it. */ CTR2(KTR_SIG, "sendsig: sigexit td=%p fp=%p", td, fp); PROC_LOCK(p); sigexit(td, SIGILL); } tf->tf_x[0]= sig; tf->tf_x[1] = (register_t)&fp->sf_si; tf->tf_x[2] = (register_t)&fp->sf_uc; tf->tf_elr = (register_t)catcher; tf->tf_sp = (register_t)fp; tf->tf_lr = (register_t)__kernel_rt_sigreturn; CTR3(KTR_SIG, "sendsig: return td=%p pc=%#x sp=%#x", td, tf->tf_elr, tf->tf_sp); PROC_LOCK(p); mtx_lock(&psp->ps_mtx); } struct sysentvec elf_linux_sysvec = { .sv_size = LINUX_SYS_MAXSYSCALL, .sv_table = linux_sysent, .sv_transtrap = linux_translate_traps, .sv_fixup = linux_elf_fixup, .sv_sendsig = linux_rt_sendsig, .sv_sigcode = &_binary_linux_vdso_so_o_start, .sv_szsigcode = &linux_szsigcode, .sv_name = "Linux ELF64", .sv_coredump = elf64_coredump, .sv_elf_core_osabi = ELFOSABI_NONE, .sv_elf_core_abi_vendor = LINUX_ABI_VENDOR, .sv_elf_core_prepare_notes = linux64_prepare_notes, .sv_imgact_try = linux_exec_imgact_try, .sv_minsigstksz = LINUX_MINSIGSTKSZ, .sv_minuser = VM_MIN_ADDRESS, .sv_maxuser = VM_MAXUSER_ADDRESS, .sv_usrstack = LINUX_USRSTACK, .sv_psstrings = LINUX_PS_STRINGS, .sv_stackprot = VM_PROT_READ | VM_PROT_WRITE, .sv_copyout_auxargs = linux_copyout_auxargs, .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_SIG_DISCIGN | SV_SIG_WAITNDQ | SV_TIMEKEEP, .sv_set_syscall_retval = linux_set_syscall_retval, .sv_fetch_syscall_args = linux_fetch_syscall_args, .sv_syscallnames = NULL, .sv_shared_page_base = LINUX_SHAREDPAGE, .sv_shared_page_len = PAGE_SIZE, .sv_schedtail = linux_schedtail, .sv_thread_detach = linux_thread_detach, .sv_trap = NULL, .sv_hwcap = &elf_hwcap, .sv_hwcap2 = &elf_hwcap2, .sv_onexec = linux_on_exec_vmspace, .sv_onexit = linux_on_exit, .sv_ontdexit = linux_thread_dtor, .sv_setid_allowed = &linux_setid_allowed_query, }; static int linux_on_exec_vmspace(struct proc *p, struct image_params *imgp) { int error; error = linux_map_vdso(p, linux_vdso_obj, linux_vdso_base, LINUX_VDSOPAGE_SIZE, imgp); if (error == 0) linux_on_exec(p, imgp); return (error); } /* * linux_vdso_install() and linux_exec_sysvec_init() must be called * after exec_sysvec_init() which is SI_SUB_EXEC (SI_ORDER_ANY). */ static void linux_exec_sysvec_init(void *param) { l_uintptr_t *ktimekeep_base; struct sysentvec *sv; ptrdiff_t tkoff; sv = param; /* Fill timekeep_base */ exec_sysvec_init(sv); tkoff = kern_timekeep_base - linux_vdso_base; ktimekeep_base = (l_uintptr_t *)(linux_vdso_mapping + tkoff); *ktimekeep_base = sv->sv_timekeep_base; } SYSINIT(elf_linux_exec_sysvec_init, SI_SUB_EXEC + 1, SI_ORDER_ANY, linux_exec_sysvec_init, &elf_linux_sysvec); static void linux_vdso_install(const void *param) { char *vdso_start = &_binary_linux_vdso_so_o_start; char *vdso_end = &_binary_linux_vdso_so_o_end; linux_szsigcode = vdso_end - vdso_start; MPASS(linux_szsigcode <= LINUX_VDSOPAGE_SIZE); linux_vdso_base = LINUX_VDSOPAGE; __elfN(linux_vdso_fixup)(vdso_start, linux_vdso_base); linux_vdso_obj = __elfN(linux_shared_page_init) (&linux_vdso_mapping, LINUX_VDSOPAGE_SIZE); bcopy(vdso_start, linux_vdso_mapping, linux_szsigcode); linux_vdso_reloc(linux_vdso_mapping, linux_vdso_base); } SYSINIT(elf_linux_vdso_init, SI_SUB_EXEC + 1, SI_ORDER_FIRST, linux_vdso_install, NULL); static void linux_vdso_deinstall(const void *param) { __elfN(linux_shared_page_fini)(linux_vdso_obj, linux_vdso_mapping, LINUX_VDSOPAGE_SIZE); } SYSUNINIT(elf_linux_vdso_uninit, SI_SUB_EXEC, SI_ORDER_FIRST, linux_vdso_deinstall, NULL); static void linux_vdso_reloc(char *mapping, Elf_Addr offset) { Elf_Size rtype, symidx; const Elf_Rela *rela; const Elf_Shdr *shdr; const Elf_Ehdr *ehdr; Elf_Addr *where; Elf_Addr addr, addend; int i, relacnt; MPASS(offset != 0); relacnt = 0; ehdr = (const Elf_Ehdr *)mapping; shdr = (const Elf_Shdr *)(mapping + ehdr->e_shoff); for (i = 0; i < ehdr->e_shnum; i++) { switch (shdr[i].sh_type) { case SHT_REL: printf("Linux Aarch64 vDSO: unexpected Rel section\n"); break; case SHT_RELA: rela = (const Elf_Rela *)(mapping + shdr[i].sh_offset); relacnt = shdr[i].sh_size / sizeof(*rela); } } for (i = 0; i < relacnt; i++, rela++) { where = (Elf_Addr *)(mapping + rela->r_offset); addend = rela->r_addend; rtype = ELF_R_TYPE(rela->r_info); symidx = ELF_R_SYM(rela->r_info); switch (rtype) { case R_AARCH64_NONE: /* none */ break; case R_AARCH64_RELATIVE: /* B + A */ addr = (Elf_Addr)(mapping + addend); if (*where != addr) *where = addr; break; default: printf("Linux Aarch64 vDSO: unexpected relocation type %ld, " "symbol index %ld\n", rtype, symidx); } } } static char GNU_ABI_VENDOR[] = "GNU"; static int GNU_ABI_LINUX = 0; /* LINUXTODO: deduplicate */ static bool 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] != GNU_ABI_LINUX) return (false); *osrel = LINUX_KERNVER(desc[1], desc[2], desc[3]); return (true); } static Elf_Brandnote linux64_brandnote = { .hdr.n_namesz = sizeof(GNU_ABI_VENDOR), .hdr.n_descsz = 16, .hdr.n_type = 1, .vendor = GNU_ABI_VENDOR, .flags = BN_TRANSLATE_OSREL, .trans_osrel = linux_trans_osrel }; static Elf64_Brandinfo linux_glibc2brand = { .brand = ELFOSABI_LINUX, .machine = EM_AARCH64, .compat_3_brand = "Linux", .emul_path = linux_emul_path, .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 }; Elf64_Brandinfo *linux_brandlist[] = { &linux_glibc2brand, NULL }; static int linux64_elf_modevent(module_t mod, int type, void *data) { Elf64_Brandinfo **brandinfo; struct linux_ioctl_handler**lihp; int error; 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); stclohz = (stathz ? stathz : hz); if (bootverbose) printf("Linux arm64 ELF exec handler installed\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); if (bootverbose) printf("Linux arm64 ELF exec handler removed\n"); } else printf("Could not deinstall Linux arm64 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, "AArch64 Linux 64bit support"); diff --git a/sys/sys/proc.h b/sys/sys/proc.h index f448c8a9d104..ff97bfbd54a9 100644 --- a/sys/sys/proc.h +++ b/sys/sys/proc.h @@ -1,1313 +1,1312 @@ /*- * SPDX-License-Identifier: BSD-3-Clause * * Copyright (c) 1986, 1989, 1991, 1993 * The Regents of the University of California. All rights reserved. * (c) UNIX System Laboratories, Inc. * All or some portions of this file are derived from material licensed * to the University of California by American Telephone and Telegraph * Co. or Unix System Laboratories, Inc. and are reproduced herein with * the permission of UNIX System Laboratories, Inc. * * 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. * * @(#)proc.h 8.15 (Berkeley) 5/19/95 * $FreeBSD$ */ #ifndef _SYS_PROC_H_ #define _SYS_PROC_H_ #include /* For struct callout. */ #include /* For struct klist. */ #ifdef _KERNEL #include #endif #include #ifndef _KERNEL #include #endif #include #include #include #include #include #include #include /* XXX. */ #include #include #include #include #include #ifndef _KERNEL #include /* For structs itimerval, timeval. */ #else #include #include #endif #include #include #include #include #include /* Machine-dependent proc substruct. */ #ifdef _KERNEL #include #endif /* * One structure allocated per session. * * List of locks * (m) locked by s_mtx mtx * (e) locked by proctree_lock sx * (c) const until freeing */ struct session { u_int s_count; /* Ref cnt; pgrps in session - atomic. */ struct proc *s_leader; /* (m + e) Session leader. */ struct vnode *s_ttyvp; /* (m) Vnode of controlling tty. */ struct cdev_priv *s_ttydp; /* (m) Device of controlling tty. */ struct tty *s_ttyp; /* (e) Controlling tty. */ pid_t s_sid; /* (c) Session ID. */ /* (m) Setlogin() name: */ char s_login[roundup(MAXLOGNAME, sizeof(long))]; struct mtx s_mtx; /* Mutex to protect members. */ }; /* * One structure allocated per process group. * * List of locks * (m) locked by pg_mtx mtx * (e) locked by proctree_lock sx * (c) const until freeing */ struct pgrp { LIST_ENTRY(pgrp) pg_hash; /* (e) Hash chain. */ LIST_HEAD(, proc) pg_members; /* (m + e) Pointer to pgrp members. */ struct session *pg_session; /* (c) Pointer to session. */ struct sigiolst pg_sigiolst; /* (m) List of sigio sources. */ pid_t pg_id; /* (c) Process group id. */ struct mtx pg_mtx; /* Mutex to protect members */ int pg_flags; /* (m) PGRP_ flags */ }; #define PGRP_ORPHANED 0x00000001 /* Group is orphaned */ /* * pargs, used to hold a copy of the command line, if it had a sane length. */ struct pargs { u_int ar_ref; /* Reference count. */ u_int ar_length; /* Length. */ u_char ar_args[1]; /* Arguments. */ }; /*- * Description of a process. * * This structure contains the information needed to manage a thread of * control, known in UN*X as a process; it has references to substructures * containing descriptions of things that the process uses, but may share * with related processes. The process structure and the substructures * are always addressable except for those marked "(CPU)" below, * which might be addressable only on a processor on which the process * is running. * * Below is a key of locks used to protect each member of struct proc. The * lock is indicated by a reference to a specific character in parens in the * associated comment. * * - not yet protected * a - only touched by curproc or parent during fork/wait * b - created at fork, never changes * (exception aiods switch vmspaces, but they are also * marked 'P_SYSTEM' so hopefully it will be left alone) * c - locked by proc mtx * d - locked by allproc_lock lock * e - locked by proctree_lock lock * f - session mtx * g - process group mtx * h - callout_lock mtx * i - by curproc or the master session mtx * j - locked by proc slock * k - only accessed by curthread * k*- only accessed by curthread and from an interrupt * kx- only accessed by curthread and by debugger * l - the attaching proc or attaching proc parent * m - Giant * n - not locked, lazy * o - ktrace lock * q - td_contested lock * r - p_peers lock * s - see sleepq_switch(), sleeping_on_old_rtc(), and sleep(9) * t - thread lock * u - process stat lock * w - process timer lock * x - created at fork, only changes during single threading in exec * y - created at first aio, doesn't change until exit or exec at which * point we are single-threaded and only curthread changes it * z - zombie threads lock * * If the locking key specifies two identifiers (for example, p_pptr) then * either lock is sufficient for read access, but both locks must be held * for write access. */ struct cpuset; struct filecaps; struct filemon; struct kaioinfo; struct kaudit_record; struct kcov_info; struct kdtrace_proc; struct kdtrace_thread; struct kmsan_td; struct kq_timer_cb_data; struct mqueue_notifier; struct p_sched; struct proc; struct procdesc; struct racct; struct sbuf; struct sleepqueue; struct socket; struct td_sched; struct thread; struct trapframe; struct turnstile; struct vm_map; struct vm_map_entry; struct epoch_tracker; -#define MAXARGS 8 struct syscall_args { u_int code; u_int original_code; struct sysent *callp; - register_t args[MAXARGS]; + register_t args[8]; }; /* * XXX: Does this belong in resource.h or resourcevar.h instead? * Resource usage extension. The times in rusage structs in the kernel are * never up to date. The actual times are kept as runtimes and tick counts * (with control info in the "previous" times), and are converted when * userland asks for rusage info. Backwards compatibility prevents putting * this directly in the user-visible rusage struct. * * Locking for p_rux: (cu) means (u) for p_rux and (c) for p_crux. * Locking for td_rux: (t) for all fields. */ struct rusage_ext { uint64_t rux_runtime; /* (cu) Real time. */ uint64_t rux_uticks; /* (cu) Statclock hits in user mode. */ uint64_t rux_sticks; /* (cu) Statclock hits in sys mode. */ uint64_t rux_iticks; /* (cu) Statclock hits in intr mode. */ uint64_t rux_uu; /* (c) Previous user time in usec. */ uint64_t rux_su; /* (c) Previous sys time in usec. */ uint64_t rux_tu; /* (c) Previous total time in usec. */ }; /* * Kernel runnable context (thread). * This is what is put to sleep and reactivated. * Thread context. Processes may have multiple threads. */ struct thread { struct mtx *volatile td_lock; /* replaces sched lock */ struct proc *td_proc; /* (*) Associated process. */ TAILQ_ENTRY(thread) td_plist; /* (*) All threads in this proc. */ TAILQ_ENTRY(thread) td_runq; /* (t) Run queue. */ union { TAILQ_ENTRY(thread) td_slpq; /* (t) Sleep queue. */ struct thread *td_zombie; /* Zombie list linkage */ }; TAILQ_ENTRY(thread) td_lockq; /* (t) Lock queue. */ LIST_ENTRY(thread) td_hash; /* (d) Hash chain. */ struct cpuset *td_cpuset; /* (t) CPU affinity mask. */ struct domainset_ref td_domain; /* (a) NUMA policy */ struct seltd *td_sel; /* Select queue/channel. */ struct sleepqueue *td_sleepqueue; /* (k) Associated sleep queue. */ struct turnstile *td_turnstile; /* (k) Associated turnstile. */ struct rl_q_entry *td_rlqe; /* (k) Associated range lock entry. */ struct umtx_q *td_umtxq; /* (c?) Link for when we're blocked. */ lwpid_t td_tid; /* (b) Thread ID. */ sigqueue_t td_sigqueue; /* (c) Sigs arrived, not delivered. */ #define td_siglist td_sigqueue.sq_signals u_char td_lend_user_pri; /* (t) Lend user pri. */ u_char td_allocdomain; /* (b) NUMA domain backing this struct thread. */ struct kmsan_td *td_kmsan; /* (k) KMSAN state */ /* Cleared during fork1() */ #define td_startzero td_flags int td_flags; /* (t) TDF_* flags. */ int td_inhibitors; /* (t) Why can not run. */ int td_pflags; /* (k) Private thread (TDP_*) flags. */ int td_pflags2; /* (k) Private thread (TDP2_*) flags. */ int td_dupfd; /* (k) Ret value from fdopen. XXX */ int td_sqqueue; /* (t) Sleepqueue queue blocked on. */ const void *td_wchan; /* (t) Sleep address. */ const char *td_wmesg; /* (t) Reason for sleep. */ volatile u_char td_owepreempt; /* (k*) Preempt on last critical_exit */ u_char td_tsqueue; /* (t) Turnstile queue blocked on. */ short td_locks; /* (k) Debug: count of non-spin locks */ short td_rw_rlocks; /* (k) Count of rwlock read locks. */ short td_sx_slocks; /* (k) Count of sx shared locks. */ short td_lk_slocks; /* (k) Count of lockmgr shared locks. */ short td_stopsched; /* (k) Scheduler stopped. */ struct turnstile *td_blocked; /* (t) Lock thread is blocked on. */ const char *td_lockname; /* (t) Name of lock blocked on. */ LIST_HEAD(, turnstile) td_contested; /* (q) Contested locks. */ struct lock_list_entry *td_sleeplocks; /* (k) Held sleep locks. */ int td_intr_nesting_level; /* (k) Interrupt recursion. */ int td_pinned; /* (k) Temporary cpu pin count. */ struct ucred *td_realucred; /* (k) Reference to credentials. */ struct ucred *td_ucred; /* (k) Used credentials, temporarily switchable. */ struct plimit *td_limit; /* (k) Resource limits. */ int td_slptick; /* (t) Time at sleep. */ int td_blktick; /* (t) Time spent blocked. */ int td_swvoltick; /* (t) Time at last SW_VOL switch. */ int td_swinvoltick; /* (t) Time at last SW_INVOL switch. */ u_int td_cow; /* (*) Number of copy-on-write faults */ struct rusage td_ru; /* (t) rusage information. */ struct rusage_ext td_rux; /* (t) Internal rusage information. */ uint64_t td_incruntime; /* (t) Cpu ticks to transfer to proc. */ uint64_t td_runtime; /* (t) How many cpu ticks we've run. */ u_int td_pticks; /* (t) Statclock hits for profiling */ u_int td_sticks; /* (t) Statclock hits in system mode. */ u_int td_iticks; /* (t) Statclock hits in intr mode. */ u_int td_uticks; /* (t) Statclock hits in user mode. */ int td_intrval; /* (t) Return value for sleepq. */ sigset_t td_oldsigmask; /* (k) Saved mask from pre sigpause. */ volatile u_int td_generation; /* (k) For detection of preemption */ stack_t td_sigstk; /* (k) Stack ptr and on-stack flag. */ int td_xsig; /* (c) Signal for ptrace */ u_long td_profil_addr; /* (k) Temporary addr until AST. */ u_int td_profil_ticks; /* (k) Temporary ticks until AST. */ char td_name[MAXCOMLEN + 1]; /* (*) Thread name. */ struct file *td_fpop; /* (k) file referencing cdev under op */ int td_dbgflags; /* (c) Userland debugger flags */ siginfo_t td_si; /* (c) For debugger or core file */ int td_ng_outbound; /* (k) Thread entered ng from above. */ struct osd td_osd; /* (k) Object specific data. */ struct vm_map_entry *td_map_def_user; /* (k) Deferred entries. */ pid_t td_dbg_forked; /* (c) Child pid for debugger. */ struct vnode *td_vp_reserved;/* (k) Preallocated vnode. */ u_int td_no_sleeping; /* (k) Sleeping disabled count. */ void *td_su; /* (k) FFS SU private */ sbintime_t td_sleeptimo; /* (t) Sleep timeout. */ int td_rtcgen; /* (s) rtc_generation of abs. sleep */ int td_errno; /* (k) Error from last syscall. */ size_t td_vslock_sz; /* (k) amount of vslock-ed space */ struct kcov_info *td_kcov_info; /* (*) Kernel code coverage data */ u_int td_ucredref; /* (k) references on td_realucred */ #define td_endzero td_sigmask /* Copied during fork1() or create_thread(). */ #define td_startcopy td_endzero sigset_t td_sigmask; /* (c) Current signal mask. */ u_char td_rqindex; /* (t) Run queue index. */ u_char td_base_pri; /* (t) Thread base kernel priority. */ u_char td_priority; /* (t) Thread active priority. */ u_char td_pri_class; /* (t) Scheduling class. */ u_char td_user_pri; /* (t) User pri from estcpu and nice. */ u_char td_base_user_pri; /* (t) Base user pri */ uintptr_t td_rb_list; /* (k) Robust list head. */ uintptr_t td_rbp_list; /* (k) Robust priv list head. */ uintptr_t td_rb_inact; /* (k) Current in-action mutex loc. */ struct syscall_args td_sa; /* (kx) Syscall parameters. Copied on fork for child tracing. */ void *td_sigblock_ptr; /* (k) uptr for fast sigblock. */ uint32_t td_sigblock_val; /* (k) fast sigblock value read at td_sigblock_ptr on kern entry */ #define td_endcopy td_pcb /* * Fields that must be manually set in fork1() or create_thread() * or already have been set in the allocator, constructor, etc. */ struct pcb *td_pcb; /* (k) Kernel VA of pcb and kstack. */ enum td_states { TDS_INACTIVE = 0x0, TDS_INHIBITED, TDS_CAN_RUN, TDS_RUNQ, TDS_RUNNING } td_state; /* (t) thread state */ /* Note: td_state must be accessed using TD_{GET,SET}_STATE(). */ union { register_t tdu_retval[2]; off_t tdu_off; } td_uretoff; /* (k) Syscall aux returns. */ #define td_retval td_uretoff.tdu_retval u_int td_cowgen; /* (k) Generation of COW pointers. */ /* LP64 hole */ struct callout td_slpcallout; /* (h) Callout for sleep. */ struct trapframe *td_frame; /* (k) */ vm_offset_t td_kstack; /* (a) Kernel VA of kstack. */ int td_kstack_pages; /* (a) Size of the kstack. */ volatile u_int td_critnest; /* (k*) Critical section nest level. */ struct mdthread td_md; /* (k) Any machine-dependent fields. */ struct kaudit_record *td_ar; /* (k) Active audit record, if any. */ struct lpohead td_lprof[2]; /* (a) lock profiling objects. */ struct kdtrace_thread *td_dtrace; /* (*) DTrace-specific data. */ struct vnet *td_vnet; /* (k) Effective vnet. */ const char *td_vnet_lpush; /* (k) Debugging vnet push / pop. */ struct trapframe *td_intr_frame;/* (k) Frame of the current irq */ struct proc *td_rfppwait_p; /* (k) The vforked child */ struct vm_page **td_ma; /* (k) uio pages held */ int td_ma_cnt; /* (k) size of *td_ma */ /* LP64 hole */ void *td_emuldata; /* Emulator state data */ int td_lastcpu; /* (t) Last cpu we were on. */ int td_oncpu; /* (t) Which cpu we are on. */ void *td_lkpi_task; /* LinuxKPI task struct pointer */ int td_pmcpend; void *td_coredump; /* (c) coredump request. */ off_t td_ktr_io_lim; /* (k) limit for ktrace file size */ #ifdef EPOCH_TRACE SLIST_HEAD(, epoch_tracker) td_epochs; #endif }; struct thread0_storage { struct thread t0st_thread; uint64_t t0st_sched[10]; }; struct mtx *thread_lock_block(struct thread *); void thread_lock_block_wait(struct thread *); void thread_lock_set(struct thread *, struct mtx *); void thread_lock_unblock(struct thread *, struct mtx *); #define THREAD_LOCK_ASSERT(td, type) \ mtx_assert((td)->td_lock, (type)) #define THREAD_LOCK_BLOCKED_ASSERT(td, type) \ do { \ struct mtx *__m = (td)->td_lock; \ if (__m != &blocked_lock) \ mtx_assert(__m, (type)); \ } while (0) #ifdef INVARIANTS #define THREAD_LOCKPTR_ASSERT(td, lock) \ do { \ struct mtx *__m; \ __m = (td)->td_lock; \ KASSERT(__m == (lock), \ ("Thread %p lock %p does not match %p", td, __m, (lock))); \ } while (0) #define THREAD_LOCKPTR_BLOCKED_ASSERT(td, lock) \ do { \ struct mtx *__m; \ __m = (td)->td_lock; \ KASSERT(__m == (lock) || __m == &blocked_lock, \ ("Thread %p lock %p does not match %p", td, __m, (lock))); \ } while (0) #define TD_LOCKS_INC(td) ((td)->td_locks++) #define TD_LOCKS_DEC(td) do { \ KASSERT(SCHEDULER_STOPPED_TD(td) || (td)->td_locks > 0, \ ("thread %p owns no locks", (td))); \ (td)->td_locks--; \ } while (0) #else #define THREAD_LOCKPTR_ASSERT(td, lock) #define THREAD_LOCKPTR_BLOCKED_ASSERT(td, lock) #define TD_LOCKS_INC(td) #define TD_LOCKS_DEC(td) #endif /* * Flags kept in td_flags: * To change these you MUST have the scheduler lock. */ #define TDF_BORROWING 0x00000001 /* Thread is borrowing pri from another. */ #define TDF_INPANIC 0x00000002 /* Caused a panic, let it drive crashdump. */ #define TDF_INMEM 0x00000004 /* Thread's stack is in memory. */ #define TDF_SINTR 0x00000008 /* Sleep is interruptible. */ #define TDF_TIMEOUT 0x00000010 /* Timing out during sleep. */ #define TDF_IDLETD 0x00000020 /* This is a per-CPU idle thread. */ #define TDF_CANSWAP 0x00000040 /* Thread can be swapped. */ #define TDF_SIGWAIT 0x00000080 /* Ignore ignored signals */ #define TDF_KTH_SUSP 0x00000100 /* kthread is suspended */ #define TDF_ALLPROCSUSP 0x00000200 /* suspended by SINGLE_ALLPROC */ #define TDF_BOUNDARY 0x00000400 /* Thread suspended at user boundary */ #define TDF_ASTPENDING 0x00000800 /* Thread has some asynchronous events. */ #define TDF_KQTICKLED 0x00001000 /* AST drain kqueue taskqueue */ #define TDF_SBDRY 0x00002000 /* Stop only on usermode boundary. */ #define TDF_UPIBLOCKED 0x00004000 /* Thread blocked on user PI mutex. */ #define TDF_NEEDSUSPCHK 0x00008000 /* Thread may need to suspend. */ #define TDF_NEEDRESCHED 0x00010000 /* Thread needs to yield. */ #define TDF_NEEDSIGCHK 0x00020000 /* Thread may need signal delivery. */ #define TDF_NOLOAD 0x00040000 /* Ignore during load avg calculations. */ #define TDF_SERESTART 0x00080000 /* ERESTART on stop attempts. */ #define TDF_THRWAKEUP 0x00100000 /* Libthr thread must not suspend itself. */ #define TDF_SEINTR 0x00200000 /* EINTR on stop attempts. */ #define TDF_SWAPINREQ 0x00400000 /* Swapin request due to wakeup. */ #define TDF_UNUSED23 0x00800000 /* --available-- */ #define TDF_SCHED0 0x01000000 /* Reserved for scheduler private use */ #define TDF_SCHED1 0x02000000 /* Reserved for scheduler private use */ #define TDF_SCHED2 0x04000000 /* Reserved for scheduler private use */ #define TDF_SCHED3 0x08000000 /* Reserved for scheduler private use */ #define TDF_ALRMPEND 0x10000000 /* Pending SIGVTALRM needs to be posted. */ #define TDF_PROFPEND 0x20000000 /* Pending SIGPROF needs to be posted. */ #define TDF_MACPEND 0x40000000 /* AST-based MAC event pending. */ /* Userland debug flags */ #define TDB_SUSPEND 0x00000001 /* Thread is suspended by debugger */ #define TDB_XSIG 0x00000002 /* Thread is exchanging signal under trace */ #define TDB_USERWR 0x00000004 /* Debugger modified memory or registers */ #define TDB_SCE 0x00000008 /* Thread performs syscall enter */ #define TDB_SCX 0x00000010 /* Thread performs syscall exit */ #define TDB_EXEC 0x00000020 /* TDB_SCX from exec(2) family */ #define TDB_FORK 0x00000040 /* TDB_SCX from fork(2) that created new process */ #define TDB_STOPATFORK 0x00000080 /* Stop at the return from fork (child only) */ #define TDB_CHILD 0x00000100 /* New child indicator for ptrace() */ #define TDB_BORN 0x00000200 /* New LWP indicator for ptrace() */ #define TDB_EXIT 0x00000400 /* Exiting LWP indicator for ptrace() */ #define TDB_VFORK 0x00000800 /* vfork indicator for ptrace() */ #define TDB_FSTP 0x00001000 /* The thread is PT_ATTACH leader */ #define TDB_STEP 0x00002000 /* (x86) PSL_T set for PT_STEP */ #define TDB_SSWITCH 0x00004000 /* Suspended in ptracestop */ #define TDB_COREDUMPRQ 0x00008000 /* Coredump request */ /* * "Private" flags kept in td_pflags: * These are only written by curthread and thus need no locking. */ #define TDP_OLDMASK 0x00000001 /* Need to restore mask after suspend. */ #define TDP_INKTR 0x00000002 /* Thread is currently in KTR code. */ #define TDP_INKTRACE 0x00000004 /* Thread is currently in KTRACE code. */ #define TDP_BUFNEED 0x00000008 /* Do not recurse into the buf flush */ #define TDP_COWINPROGRESS 0x00000010 /* Snapshot copy-on-write in progress. */ #define TDP_ALTSTACK 0x00000020 /* Have alternate signal stack. */ #define TDP_DEADLKTREAT 0x00000040 /* Lock acquisition - deadlock treatment. */ #define TDP_NOFAULTING 0x00000080 /* Do not handle page faults. */ #define TDP_SIGFASTBLOCK 0x00000100 /* Fast sigblock active */ #define TDP_OWEUPC 0x00000200 /* Call addupc() at next AST. */ #define TDP_ITHREAD 0x00000400 /* Thread is an interrupt thread. */ #define TDP_SYNCIO 0x00000800 /* Local override, disable async i/o. */ #define TDP_SCHED1 0x00001000 /* Reserved for scheduler private use */ #define TDP_SCHED2 0x00002000 /* Reserved for scheduler private use */ #define TDP_SCHED3 0x00004000 /* Reserved for scheduler private use */ #define TDP_SCHED4 0x00008000 /* Reserved for scheduler private use */ #define TDP_GEOM 0x00010000 /* Settle GEOM before finishing syscall */ #define TDP_SOFTDEP 0x00020000 /* Stuck processing softdep worklist */ #define TDP_NORUNNINGBUF 0x00040000 /* Ignore runningbufspace check */ #define TDP_WAKEUP 0x00080000 /* Don't sleep in umtx cond_wait */ #define TDP_INBDFLUSH 0x00100000 /* Already in BO_BDFLUSH, do not recurse */ #define TDP_KTHREAD 0x00200000 /* This is an official kernel thread */ #define TDP_CALLCHAIN 0x00400000 /* Capture thread's callchain */ #define TDP_IGNSUSP 0x00800000 /* Permission to ignore the MNTK_SUSPEND* */ #define TDP_AUDITREC 0x01000000 /* Audit record pending on thread */ #define TDP_RFPPWAIT 0x02000000 /* Handle RFPPWAIT on syscall exit */ #define TDP_RESETSPUR 0x04000000 /* Reset spurious page fault history. */ #define TDP_NERRNO 0x08000000 /* Last errno is already in td_errno */ #define TDP_UIOHELD 0x10000000 /* Current uio has pages held in td_ma */ #define TDP_UNUSED0 0x20000000 /* UNUSED */ #define TDP_EXECVMSPC 0x40000000 /* Execve destroyed old vmspace */ #define TDP_SIGFASTPENDING 0x80000000 /* Pending signal due to sigfastblock */ #define TDP2_SBPAGES 0x00000001 /* Owns sbusy on some pages */ #define TDP2_COMPAT32RB 0x00000002 /* compat32 ABI for robust lists */ #define TDP2_ACCT 0x00000004 /* Doing accounting */ /* * Reasons that the current thread can not be run yet. * More than one may apply. */ #define TDI_SUSPENDED 0x0001 /* On suspension queue. */ #define TDI_SLEEPING 0x0002 /* Actually asleep! (tricky). */ #define TDI_SWAPPED 0x0004 /* Stack not in mem. Bad juju if run. */ #define TDI_LOCK 0x0008 /* Stopped on a lock. */ #define TDI_IWAIT 0x0010 /* Awaiting interrupt. */ #define TD_IS_SLEEPING(td) ((td)->td_inhibitors & TDI_SLEEPING) #define TD_ON_SLEEPQ(td) ((td)->td_wchan != NULL) #define TD_IS_SUSPENDED(td) ((td)->td_inhibitors & TDI_SUSPENDED) #define TD_IS_SWAPPED(td) ((td)->td_inhibitors & TDI_SWAPPED) #define TD_ON_LOCK(td) ((td)->td_inhibitors & TDI_LOCK) #define TD_AWAITING_INTR(td) ((td)->td_inhibitors & TDI_IWAIT) #ifdef _KERNEL #define TD_GET_STATE(td) atomic_load_int(&(td)->td_state) #else #define TD_GET_STATE(td) ((td)->td_state) #endif #define TD_IS_RUNNING(td) (TD_GET_STATE(td) == TDS_RUNNING) #define TD_ON_RUNQ(td) (TD_GET_STATE(td) == TDS_RUNQ) #define TD_CAN_RUN(td) (TD_GET_STATE(td) == TDS_CAN_RUN) #define TD_IS_INHIBITED(td) (TD_GET_STATE(td) == TDS_INHIBITED) #define TD_ON_UPILOCK(td) ((td)->td_flags & TDF_UPIBLOCKED) #define TD_IS_IDLETHREAD(td) ((td)->td_flags & TDF_IDLETD) #define TD_CAN_ABORT(td) (TD_ON_SLEEPQ((td)) && \ ((td)->td_flags & TDF_SINTR) != 0) #define KTDSTATE(td) \ (((td)->td_inhibitors & TDI_SLEEPING) != 0 ? "sleep" : \ ((td)->td_inhibitors & TDI_SUSPENDED) != 0 ? "suspended" : \ ((td)->td_inhibitors & TDI_SWAPPED) != 0 ? "swapped" : \ ((td)->td_inhibitors & TDI_LOCK) != 0 ? "blocked" : \ ((td)->td_inhibitors & TDI_IWAIT) != 0 ? "iwait" : "yielding") #define TD_SET_INHIB(td, inhib) do { \ TD_SET_STATE(td, TDS_INHIBITED); \ (td)->td_inhibitors |= (inhib); \ } while (0) #define TD_CLR_INHIB(td, inhib) do { \ if (((td)->td_inhibitors & (inhib)) && \ (((td)->td_inhibitors &= ~(inhib)) == 0)) \ TD_SET_STATE(td, TDS_CAN_RUN); \ } while (0) #define TD_SET_SLEEPING(td) TD_SET_INHIB((td), TDI_SLEEPING) #define TD_SET_SWAPPED(td) TD_SET_INHIB((td), TDI_SWAPPED) #define TD_SET_LOCK(td) TD_SET_INHIB((td), TDI_LOCK) #define TD_SET_SUSPENDED(td) TD_SET_INHIB((td), TDI_SUSPENDED) #define TD_SET_IWAIT(td) TD_SET_INHIB((td), TDI_IWAIT) #define TD_SET_EXITING(td) TD_SET_INHIB((td), TDI_EXITING) #define TD_CLR_SLEEPING(td) TD_CLR_INHIB((td), TDI_SLEEPING) #define TD_CLR_SWAPPED(td) TD_CLR_INHIB((td), TDI_SWAPPED) #define TD_CLR_LOCK(td) TD_CLR_INHIB((td), TDI_LOCK) #define TD_CLR_SUSPENDED(td) TD_CLR_INHIB((td), TDI_SUSPENDED) #define TD_CLR_IWAIT(td) TD_CLR_INHIB((td), TDI_IWAIT) #ifdef _KERNEL #define TD_SET_STATE(td, state) atomic_store_int(&(td)->td_state, state) #else #define TD_SET_STATE(td, state) (td)->td_state = state #endif #define TD_SET_RUNNING(td) TD_SET_STATE(td, TDS_RUNNING) #define TD_SET_RUNQ(td) TD_SET_STATE(td, TDS_RUNQ) #define TD_SET_CAN_RUN(td) TD_SET_STATE(td, TDS_CAN_RUN) #define TD_SBDRY_INTR(td) \ (((td)->td_flags & (TDF_SEINTR | TDF_SERESTART)) != 0) #define TD_SBDRY_ERRNO(td) \ (((td)->td_flags & TDF_SEINTR) != 0 ? EINTR : ERESTART) /* * Process structure. */ struct proc { LIST_ENTRY(proc) p_list; /* (d) List of all processes. */ TAILQ_HEAD(, thread) p_threads; /* (c) all threads. */ struct mtx p_slock; /* process spin lock */ struct ucred *p_ucred; /* (c) Process owner's identity. */ struct filedesc *p_fd; /* (b) Open files. */ struct filedesc_to_leader *p_fdtol; /* (b) Tracking node */ struct pwddesc *p_pd; /* (b) Cwd, chroot, jail, umask */ struct pstats *p_stats; /* (b) Accounting/statistics (CPU). */ struct plimit *p_limit; /* (c) Resource limits. */ struct callout p_limco; /* (c) Limit callout handle */ struct sigacts *p_sigacts; /* (x) Signal actions, state (CPU). */ int p_flag; /* (c) P_* flags. */ int p_flag2; /* (c) P2_* flags. */ enum p_states { PRS_NEW = 0, /* In creation */ PRS_NORMAL, /* threads can be run. */ PRS_ZOMBIE } p_state; /* (j/c) Process status. */ pid_t p_pid; /* (b) Process identifier. */ LIST_ENTRY(proc) p_hash; /* (d) Hash chain. */ LIST_ENTRY(proc) p_pglist; /* (g + e) List of processes in pgrp. */ struct proc *p_pptr; /* (c + e) Pointer to parent process. */ LIST_ENTRY(proc) p_sibling; /* (e) List of sibling processes. */ LIST_HEAD(, proc) p_children; /* (e) Pointer to list of children. */ struct proc *p_reaper; /* (e) My reaper. */ LIST_HEAD(, proc) p_reaplist; /* (e) List of my descendants (if I am reaper). */ LIST_ENTRY(proc) p_reapsibling; /* (e) List of siblings - descendants of the same reaper. */ struct mtx p_mtx; /* (n) Lock for this struct. */ struct mtx p_statmtx; /* Lock for the stats */ struct mtx p_itimmtx; /* Lock for the virt/prof timers */ struct mtx p_profmtx; /* Lock for the profiling */ struct ksiginfo *p_ksi; /* Locked by parent proc lock */ sigqueue_t p_sigqueue; /* (c) Sigs not delivered to a td. */ #define p_siglist p_sigqueue.sq_signals pid_t p_oppid; /* (c + e) Real parent pid. */ /* The following fields are all zeroed upon creation in fork. */ #define p_startzero p_vmspace struct vmspace *p_vmspace; /* (b) Address space. */ u_int p_swtick; /* (c) Tick when swapped in or out. */ u_int p_cowgen; /* (c) Generation of COW pointers. */ struct itimerval p_realtimer; /* (c) Alarm timer. */ struct rusage p_ru; /* (a) Exit information. */ struct rusage_ext p_rux; /* (cu) Internal resource usage. */ struct rusage_ext p_crux; /* (c) Internal child resource usage. */ int p_profthreads; /* (c) Num threads in addupc_task. */ volatile int p_exitthreads; /* (j) Number of threads exiting */ int p_traceflag; /* (o) Kernel trace points. */ struct ktr_io_params *p_ktrioparms; /* (c + o) Params for ktrace. */ struct vnode *p_textvp; /* (b) Vnode of executable. */ struct vnode *p_textdvp; /* (b) Dir containing textvp. */ char *p_binname; /* (b) Binary hardlink name. */ u_int p_lock; /* (c) Proclock (prevent swap) count. */ struct sigiolst p_sigiolst; /* (c) List of sigio sources. */ int p_sigparent; /* (c) Signal to parent on exit. */ int p_sig; /* (n) For core dump/debugger XXX. */ u_int p_ptevents; /* (c + e) ptrace() event mask. */ struct kaioinfo *p_aioinfo; /* (y) ASYNC I/O info. */ struct thread *p_singlethread;/* (c + j) If single threading this is it */ int p_suspcount; /* (j) Num threads in suspended mode. */ struct thread *p_xthread; /* (c) Trap thread */ int p_boundary_count;/* (j) Num threads at user boundary */ int p_pendingcnt; /* how many signals are pending */ struct itimers *p_itimers; /* (c) POSIX interval timers. */ struct procdesc *p_procdesc; /* (e) Process descriptor, if any. */ u_int p_treeflag; /* (e) P_TREE flags */ int p_pendingexits; /* (c) Count of pending thread exits. */ struct filemon *p_filemon; /* (c) filemon-specific data. */ int p_pdeathsig; /* (c) Signal from parent on exit. */ /* End area that is zeroed on creation. */ #define p_endzero p_magic /* The following fields are all copied upon creation in fork. */ #define p_startcopy p_endzero u_int p_magic; /* (b) Magic number. */ int p_osrel; /* (x) osreldate for the binary (from ELF note, if any) */ uint32_t p_fctl0; /* (x) ABI feature control, ELF note */ char p_comm[MAXCOMLEN + 1]; /* (x) Process name. */ struct sysentvec *p_sysent; /* (b) Syscall dispatch info. */ struct pargs *p_args; /* (c) Process arguments. */ rlim_t p_cpulimit; /* (c) Current CPU limit in seconds. */ signed char p_nice; /* (c) Process "nice" value. */ int p_fibnum; /* in this routing domain XXX MRT */ pid_t p_reapsubtree; /* (e) Pid of the direct child of the reaper which spawned our subtree. */ uint64_t p_elf_flags; /* (x) ELF flags */ void *p_elf_brandinfo; /* (x) Elf_Brandinfo, NULL for non ELF binaries. */ /* End area that is copied on creation. */ #define p_endcopy p_xexit u_int p_xexit; /* (c) Exit code. */ u_int p_xsig; /* (c) Stop/kill sig. */ struct pgrp *p_pgrp; /* (c + e) Pointer to process group. */ struct knlist *p_klist; /* (c) Knotes attached to this proc. */ int p_numthreads; /* (c) Number of threads. */ struct mdproc p_md; /* Any machine-dependent fields. */ struct callout p_itcallout; /* (h + c) Interval timer callout. */ u_short p_acflag; /* (c) Accounting flags. */ struct proc *p_peers; /* (r) */ struct proc *p_leader; /* (b) */ void *p_emuldata; /* (c) Emulator state data. */ struct label *p_label; /* (*) Proc (not subject) MAC label. */ STAILQ_HEAD(, ktr_request) p_ktr; /* (o) KTR event queue. */ LIST_HEAD(, mqueue_notifier) p_mqnotifier; /* (c) mqueue notifiers.*/ struct kdtrace_proc *p_dtrace; /* (*) DTrace-specific data. */ struct cv p_pwait; /* (*) wait cv for exit/exec. */ uint64_t p_prev_runtime; /* (c) Resource usage accounting. */ struct racct *p_racct; /* (b) Resource accounting. */ int p_throttled; /* (c) Flag for racct pcpu throttling */ /* * An orphan is the child that has been re-parented to the * debugger as a result of attaching to it. Need to keep * track of them for parent to be able to collect the exit * status of what used to be children. */ LIST_ENTRY(proc) p_orphan; /* (e) List of orphan processes. */ LIST_HEAD(, proc) p_orphans; /* (e) Pointer to list of orphans. */ TAILQ_HEAD(, kq_timer_cb_data) p_kqtim_stop; /* (c) */ }; #define p_session p_pgrp->pg_session #define p_pgid p_pgrp->pg_id #define NOCPU (-1) /* For when we aren't on a CPU. */ #define NOCPU_OLD (255) #define MAXCPU_OLD (254) #define PROC_SLOCK(p) mtx_lock_spin(&(p)->p_slock) #define PROC_SUNLOCK(p) mtx_unlock_spin(&(p)->p_slock) #define PROC_SLOCK_ASSERT(p, type) mtx_assert(&(p)->p_slock, (type)) #define PROC_STATLOCK(p) mtx_lock_spin(&(p)->p_statmtx) #define PROC_STATUNLOCK(p) mtx_unlock_spin(&(p)->p_statmtx) #define PROC_STATLOCK_ASSERT(p, type) mtx_assert(&(p)->p_statmtx, (type)) #define PROC_ITIMLOCK(p) mtx_lock_spin(&(p)->p_itimmtx) #define PROC_ITIMUNLOCK(p) mtx_unlock_spin(&(p)->p_itimmtx) #define PROC_ITIMLOCK_ASSERT(p, type) mtx_assert(&(p)->p_itimmtx, (type)) #define PROC_PROFLOCK(p) mtx_lock_spin(&(p)->p_profmtx) #define PROC_PROFUNLOCK(p) mtx_unlock_spin(&(p)->p_profmtx) #define PROC_PROFLOCK_ASSERT(p, type) mtx_assert(&(p)->p_profmtx, (type)) /* These flags are kept in p_flag. */ #define P_ADVLOCK 0x00000001 /* Process may hold a POSIX advisory lock. */ #define P_CONTROLT 0x00000002 /* Has a controlling terminal. */ #define P_KPROC 0x00000004 /* Kernel process. */ #define P_UNUSED3 0x00000008 /* --available-- */ #define P_PPWAIT 0x00000010 /* Parent is waiting for child to exec/exit. */ #define P_PROFIL 0x00000020 /* Has started profiling. */ #define P_STOPPROF 0x00000040 /* Has thread requesting to stop profiling. */ #define P_HADTHREADS 0x00000080 /* Has had threads (no cleanup shortcuts) */ #define P_SUGID 0x00000100 /* Had set id privileges since last exec. */ #define P_SYSTEM 0x00000200 /* System proc: no sigs, stats or swapping. */ #define P_SINGLE_EXIT 0x00000400 /* Threads suspending should exit, not wait. */ #define P_TRACED 0x00000800 /* Debugged process being traced. */ #define P_WAITED 0x00001000 /* Someone is waiting for us. */ #define P_WEXIT 0x00002000 /* Working on exiting. */ #define P_EXEC 0x00004000 /* Process called exec. */ #define P_WKILLED 0x00008000 /* Killed, go to kernel/user boundary ASAP. */ #define P_CONTINUED 0x00010000 /* Proc has continued from a stopped state. */ #define P_STOPPED_SIG 0x00020000 /* Stopped due to SIGSTOP/SIGTSTP. */ #define P_STOPPED_TRACE 0x00040000 /* Stopped because of tracing. */ #define P_STOPPED_SINGLE 0x00080000 /* Only 1 thread can continue (not to user). */ #define P_PROTECTED 0x00100000 /* Do not kill on memory overcommit. */ #define P_SIGEVENT 0x00200000 /* Process pending signals changed. */ #define P_SINGLE_BOUNDARY 0x00400000 /* Threads should suspend at user boundary. */ #define P_HWPMC 0x00800000 /* Process is using HWPMCs */ #define P_JAILED 0x01000000 /* Process is in jail. */ #define P_TOTAL_STOP 0x02000000 /* Stopped in stop_all_proc. */ #define P_INEXEC 0x04000000 /* Process is in execve(). */ #define P_STATCHILD 0x08000000 /* Child process stopped or exited. */ #define P_INMEM 0x10000000 /* Loaded into memory. */ #define P_SWAPPINGOUT 0x20000000 /* Process is being swapped out. */ #define P_SWAPPINGIN 0x40000000 /* Process is being swapped in. */ #define P_PPTRACE 0x80000000 /* PT_TRACEME by vforked child. */ #define P_STOPPED (P_STOPPED_SIG|P_STOPPED_SINGLE|P_STOPPED_TRACE) #define P_SHOULDSTOP(p) ((p)->p_flag & P_STOPPED) #define P_KILLED(p) ((p)->p_flag & P_WKILLED) /* These flags are kept in p_flag2. */ #define P2_INHERIT_PROTECTED 0x00000001 /* New children get P_PROTECTED. */ #define P2_NOTRACE 0x00000002 /* No ptrace(2) attach or coredumps. */ #define P2_NOTRACE_EXEC 0x00000004 /* Keep P2_NOPTRACE on exec(2). */ #define P2_AST_SU 0x00000008 /* Handles SU ast for kthreads. */ #define P2_PTRACE_FSTP 0x00000010 /* SIGSTOP from PT_ATTACH not yet handled. */ #define P2_TRAPCAP 0x00000020 /* SIGTRAP on ENOTCAPABLE */ #define P2_ASLR_ENABLE 0x00000040 /* Force enable ASLR. */ #define P2_ASLR_DISABLE 0x00000080 /* Force disable ASLR. */ #define P2_ASLR_IGNSTART 0x00000100 /* Enable ASLR to consume sbrk area. */ #define P2_PROTMAX_ENABLE 0x00000200 /* Force enable implied PROT_MAX. */ #define P2_PROTMAX_DISABLE 0x00000400 /* Force disable implied PROT_MAX. */ #define P2_STKGAP_DISABLE 0x00000800 /* Disable stack gap for MAP_STACK */ #define P2_STKGAP_DISABLE_EXEC 0x00001000 /* Stack gap disabled after exec */ #define P2_ITSTOPPED 0x00002000 #define P2_PTRACEREQ 0x00004000 /* Active ptrace req */ #define P2_NO_NEW_PRIVS 0x00008000 /* Ignore setuid */ #define P2_WXORX_DISABLE 0x00010000 /* WX mappings enabled */ #define P2_WXORX_ENABLE_EXEC 0x00020000 /* WXORX enabled after exec */ /* Flags protected by proctree_lock, kept in p_treeflags. */ #define P_TREE_ORPHANED 0x00000001 /* Reparented, on orphan list */ #define P_TREE_FIRST_ORPHAN 0x00000002 /* First element of orphan list */ #define P_TREE_REAPER 0x00000004 /* Reaper of subtree */ #define P_TREE_GRPEXITED 0x00000008 /* exit1() done with job ctl */ /* * These were process status values (p_stat), now they are only used in * legacy conversion code. */ #define SIDL 1 /* Process being created by fork. */ #define SRUN 2 /* Currently runnable. */ #define SSLEEP 3 /* Sleeping on an address. */ #define SSTOP 4 /* Process debugging or suspension. */ #define SZOMB 5 /* Awaiting collection by parent. */ #define SWAIT 6 /* Waiting for interrupt. */ #define SLOCK 7 /* Blocked on a lock. */ #define P_MAGIC 0xbeefface #ifdef _KERNEL /* Types and flags for mi_switch(). */ #define SW_TYPE_MASK 0xff /* First 8 bits are switch type */ #define SWT_NONE 0 /* Unspecified switch. */ #define SWT_PREEMPT 1 /* Switching due to preemption. */ #define SWT_OWEPREEMPT 2 /* Switching due to owepreempt. */ #define SWT_TURNSTILE 3 /* Turnstile contention. */ #define SWT_SLEEPQ 4 /* Sleepq wait. */ #define SWT_SLEEPQTIMO 5 /* Sleepq timeout wait. */ #define SWT_RELINQUISH 6 /* yield call. */ #define SWT_NEEDRESCHED 7 /* NEEDRESCHED was set. */ #define SWT_IDLE 8 /* Switching from the idle thread. */ #define SWT_IWAIT 9 /* Waiting for interrupts. */ #define SWT_SUSPEND 10 /* Thread suspended. */ #define SWT_REMOTEPREEMPT 11 /* Remote processor preempted. */ #define SWT_REMOTEWAKEIDLE 12 /* Remote processor preempted idle. */ #define SWT_COUNT 13 /* Number of switch types. */ /* Flags */ #define SW_VOL 0x0100 /* Voluntary switch. */ #define SW_INVOL 0x0200 /* Involuntary switch. */ #define SW_PREEMPT 0x0400 /* The invol switch is a preemption */ /* How values for thread_single(). */ #define SINGLE_NO_EXIT 0 #define SINGLE_EXIT 1 #define SINGLE_BOUNDARY 2 #define SINGLE_ALLPROC 3 #ifdef MALLOC_DECLARE MALLOC_DECLARE(M_PARGS); MALLOC_DECLARE(M_SESSION); MALLOC_DECLARE(M_SUBPROC); #endif #define FOREACH_PROC_IN_SYSTEM(p) \ LIST_FOREACH((p), &allproc, p_list) #define FOREACH_THREAD_IN_PROC(p, td) \ TAILQ_FOREACH((td), &(p)->p_threads, td_plist) #define FIRST_THREAD_IN_PROC(p) TAILQ_FIRST(&(p)->p_threads) /* * We use process IDs <= pid_max <= PID_MAX; PID_MAX + 1 must also fit * in a pid_t, as it is used to represent "no process group". */ #define PID_MAX 99999 #define NO_PID 100000 #define THREAD0_TID NO_PID extern pid_t pid_max; #define SESS_LEADER(p) ((p)->p_session->s_leader == (p)) /* Lock and unlock a process. */ #define PROC_LOCK(p) mtx_lock(&(p)->p_mtx) #define PROC_TRYLOCK(p) mtx_trylock(&(p)->p_mtx) #define PROC_UNLOCK(p) mtx_unlock(&(p)->p_mtx) #define PROC_LOCKED(p) mtx_owned(&(p)->p_mtx) #define PROC_WAIT_UNLOCKED(p) mtx_wait_unlocked(&(p)->p_mtx) #define PROC_LOCK_ASSERT(p, type) mtx_assert(&(p)->p_mtx, (type)) /* Lock and unlock a process group. */ #define PGRP_LOCK(pg) mtx_lock(&(pg)->pg_mtx) #define PGRP_UNLOCK(pg) mtx_unlock(&(pg)->pg_mtx) #define PGRP_LOCKED(pg) mtx_owned(&(pg)->pg_mtx) #define PGRP_LOCK_ASSERT(pg, type) mtx_assert(&(pg)->pg_mtx, (type)) #define PGRP_LOCK_PGSIGNAL(pg) do { \ if ((pg) != NULL) \ PGRP_LOCK(pg); \ } while (0) #define PGRP_UNLOCK_PGSIGNAL(pg) do { \ if ((pg) != NULL) \ PGRP_UNLOCK(pg); \ } while (0) /* Lock and unlock a session. */ #define SESS_LOCK(s) mtx_lock(&(s)->s_mtx) #define SESS_UNLOCK(s) mtx_unlock(&(s)->s_mtx) #define SESS_LOCKED(s) mtx_owned(&(s)->s_mtx) #define SESS_LOCK_ASSERT(s, type) mtx_assert(&(s)->s_mtx, (type)) /* * Non-zero p_lock ensures that: * - exit1() is not performed until p_lock reaches zero; * - the process' threads stack are not swapped out if they are currently * not (P_INMEM). * * PHOLD() asserts that the process (except the current process) is * not exiting, increments p_lock and swaps threads stacks into memory, * if needed. * _PHOLD() is same as PHOLD(), it takes the process locked. * _PHOLD_LITE() also takes the process locked, but comparing with * _PHOLD(), it only guarantees that exit1() is not executed, * faultin() is not called. */ #define PHOLD(p) do { \ PROC_LOCK(p); \ _PHOLD(p); \ PROC_UNLOCK(p); \ } while (0) #define _PHOLD(p) do { \ PROC_LOCK_ASSERT((p), MA_OWNED); \ KASSERT(!((p)->p_flag & P_WEXIT) || (p) == curproc, \ ("PHOLD of exiting process %p", p)); \ (p)->p_lock++; \ if (((p)->p_flag & P_INMEM) == 0) \ faultin((p)); \ } while (0) #define _PHOLD_LITE(p) do { \ PROC_LOCK_ASSERT((p), MA_OWNED); \ KASSERT(!((p)->p_flag & P_WEXIT) || (p) == curproc, \ ("PHOLD of exiting process %p", p)); \ (p)->p_lock++; \ } while (0) #define PROC_ASSERT_HELD(p) do { \ KASSERT((p)->p_lock > 0, ("process %p not held", p)); \ } while (0) #define PRELE(p) do { \ PROC_LOCK((p)); \ _PRELE((p)); \ PROC_UNLOCK((p)); \ } while (0) #define _PRELE(p) do { \ PROC_LOCK_ASSERT((p), MA_OWNED); \ PROC_ASSERT_HELD(p); \ (--(p)->p_lock); \ if (((p)->p_flag & P_WEXIT) && (p)->p_lock == 0) \ wakeup(&(p)->p_lock); \ } while (0) #define PROC_ASSERT_NOT_HELD(p) do { \ KASSERT((p)->p_lock == 0, ("process %p held", p)); \ } while (0) #define PROC_UPDATE_COW(p) do { \ PROC_LOCK_ASSERT((p), MA_OWNED); \ (p)->p_cowgen++; \ } while (0) /* Check whether a thread is safe to be swapped out. */ #define thread_safetoswapout(td) ((td)->td_flags & TDF_CANSWAP) /* Control whether or not it is safe for curthread to sleep. */ #define THREAD_NO_SLEEPING() do { \ curthread->td_no_sleeping++; \ MPASS(curthread->td_no_sleeping > 0); \ } while (0) #define THREAD_SLEEPING_OK() do { \ MPASS(curthread->td_no_sleeping > 0); \ curthread->td_no_sleeping--; \ } while (0) #define THREAD_CAN_SLEEP() ((curthread)->td_no_sleeping == 0) #define PIDHASH(pid) (&pidhashtbl[(pid) & pidhash]) #define PIDHASHLOCK(pid) (&pidhashtbl_lock[((pid) & pidhashlock)]) extern LIST_HEAD(pidhashhead, proc) *pidhashtbl; extern struct sx *pidhashtbl_lock; extern u_long pidhash; extern u_long pidhashlock; #define PGRPHASH(pgid) (&pgrphashtbl[(pgid) & pgrphash]) extern LIST_HEAD(pgrphashhead, pgrp) *pgrphashtbl; extern u_long pgrphash; extern struct sx allproc_lock; extern int allproc_gen; extern struct sx proctree_lock; extern struct mtx ppeers_lock; extern struct mtx procid_lock; extern struct proc proc0; /* Process slot for swapper. */ extern struct thread0_storage thread0_st; /* Primary thread in proc0. */ #define thread0 (thread0_st.t0st_thread) extern struct vmspace vmspace0; /* VM space for proc0. */ extern int hogticks; /* Limit on kernel cpu hogs. */ extern int lastpid; extern int nprocs, maxproc; /* Current and max number of procs. */ extern int maxprocperuid; /* Max procs per uid. */ extern u_long ps_arg_cache_limit; LIST_HEAD(proclist, proc); TAILQ_HEAD(procqueue, proc); TAILQ_HEAD(threadqueue, thread); extern struct proclist allproc; /* List of all processes. */ extern struct proc *initproc, *pageproc; /* Process slots for init, pager. */ extern struct uma_zone *proc_zone; extern struct uma_zone *pgrp_zone; struct proc *pfind(pid_t); /* Find process by id. */ struct proc *pfind_any(pid_t); /* Find (zombie) process by id. */ struct proc *pfind_any_locked(pid_t pid); /* Find process by id, locked. */ struct pgrp *pgfind(pid_t); /* Find process group by id. */ void pidhash_slockall(void); /* Shared lock all pid hash lists. */ void pidhash_sunlockall(void); /* Shared unlock all pid hash lists. */ struct fork_req { int fr_flags; int fr_pages; int *fr_pidp; struct proc **fr_procp; int *fr_pd_fd; int fr_pd_flags; struct filecaps *fr_pd_fcaps; int fr_flags2; #define FR2_DROPSIG_CAUGHT 0x00000001 /* Drop caught non-DFL signals */ #define FR2_SHARE_PATHS 0x00000002 /* Invert sense of RFFDG for paths */ #define FR2_KPROC 0x00000004 /* Create a kernel process */ }; /* * pget() flags. */ #define PGET_HOLD 0x00001 /* Hold the process. */ #define PGET_CANSEE 0x00002 /* Check against p_cansee(). */ #define PGET_CANDEBUG 0x00004 /* Check against p_candebug(). */ #define PGET_ISCURRENT 0x00008 /* Check that the found process is current. */ #define PGET_NOTWEXIT 0x00010 /* Check that the process is not in P_WEXIT. */ #define PGET_NOTINEXEC 0x00020 /* Check that the process is not in P_INEXEC. */ #define PGET_NOTID 0x00040 /* Do not assume tid if pid > PID_MAX. */ #define PGET_WANTREAD (PGET_HOLD | PGET_CANDEBUG | PGET_NOTWEXIT) int pget(pid_t pid, int flags, struct proc **pp); void ast(struct trapframe *framep); struct thread *choosethread(void); int cr_cansee(struct ucred *u1, struct ucred *u2); int cr_canseesocket(struct ucred *cred, struct socket *so); int cr_canseeothergids(struct ucred *u1, struct ucred *u2); int cr_canseeotheruids(struct ucred *u1, struct ucred *u2); int cr_canseejailproc(struct ucred *u1, struct ucred *u2); int cr_cansignal(struct ucred *cred, struct proc *proc, int signum); int enterpgrp(struct proc *p, pid_t pgid, struct pgrp *pgrp, struct session *sess); int enterthispgrp(struct proc *p, struct pgrp *pgrp); void faultin(struct proc *p); int fork1(struct thread *, struct fork_req *); void fork_rfppwait(struct thread *); void fork_exit(void (*)(void *, struct trapframe *), void *, struct trapframe *); void fork_return(struct thread *, struct trapframe *); int inferior(struct proc *p); void itimer_proc_continue(struct proc *p); void kqtimer_proc_continue(struct proc *p); void kern_proc_vmmap_resident(struct vm_map *map, struct vm_map_entry *entry, int *resident_count, bool *super); void kern_yield(int); void kick_proc0(void); void killjobc(void); int leavepgrp(struct proc *p); int maybe_preempt(struct thread *td); void maybe_yield(void); void mi_switch(int flags); int p_candebug(struct thread *td, struct proc *p); int p_cansee(struct thread *td, struct proc *p); int p_cansched(struct thread *td, struct proc *p); int p_cansignal(struct thread *td, struct proc *p, int signum); int p_canwait(struct thread *td, struct proc *p); struct pargs *pargs_alloc(int len); void pargs_drop(struct pargs *pa); void pargs_hold(struct pargs *pa); void proc_add_orphan(struct proc *child, struct proc *parent); int proc_get_binpath(struct proc *p, char *binname, char **fullpath, char **freepath); int proc_getargv(struct thread *td, struct proc *p, struct sbuf *sb); int proc_getauxv(struct thread *td, struct proc *p, struct sbuf *sb); int proc_getenvv(struct thread *td, struct proc *p, struct sbuf *sb); void procinit(void); int proc_iterate(int (*cb)(struct proc *, void *), void *cbarg); void proc_linkup0(struct proc *p, struct thread *td); void proc_linkup(struct proc *p, struct thread *td); struct proc *proc_realparent(struct proc *child); void proc_reap(struct thread *td, struct proc *p, int *status, int options); void proc_reparent(struct proc *child, struct proc *newparent, bool set_oppid); void proc_set_traced(struct proc *p, bool stop); void proc_wkilled(struct proc *p); struct pstats *pstats_alloc(void); void pstats_fork(struct pstats *src, struct pstats *dst); void pstats_free(struct pstats *ps); void proc_clear_orphan(struct proc *p); void reaper_abandon_children(struct proc *p, bool exiting); int securelevel_ge(struct ucred *cr, int level); int securelevel_gt(struct ucred *cr, int level); void sess_hold(struct session *); void sess_release(struct session *); int setrunnable(struct thread *, int); void setsugid(struct proc *p); int should_yield(void); int sigonstack(size_t sp); void stopevent(struct proc *, u_int, u_int); struct thread *tdfind(lwpid_t, pid_t); void threadinit(void); void tidhash_add(struct thread *); void tidhash_remove(struct thread *); void cpu_idle(int); int cpu_idle_wakeup(int); extern void (*cpu_idle_hook)(sbintime_t); /* Hook to machdep CPU idler. */ void cpu_switch(struct thread *, struct thread *, struct mtx *); void cpu_throw(struct thread *, struct thread *) __dead2; bool curproc_sigkilled(void); void userret(struct thread *, struct trapframe *); void cpu_exit(struct thread *); void exit1(struct thread *, int, int) __dead2; void cpu_copy_thread(struct thread *td, struct thread *td0); bool cpu_exec_vmspace_reuse(struct proc *p, struct vm_map *map); int cpu_fetch_syscall_args(struct thread *td); void cpu_fork(struct thread *, struct proc *, struct thread *, int); void cpu_fork_kthread_handler(struct thread *, void (*)(void *), void *); int cpu_procctl(struct thread *td, int idtype, id_t id, int com, void *data); void cpu_set_syscall_retval(struct thread *, int); void cpu_set_upcall(struct thread *, void (*)(void *), void *, stack_t *); int cpu_set_user_tls(struct thread *, void *tls_base); void cpu_thread_alloc(struct thread *); void cpu_thread_clean(struct thread *); void cpu_thread_exit(struct thread *); void cpu_thread_free(struct thread *); void cpu_thread_swapin(struct thread *); void cpu_thread_swapout(struct thread *); struct thread *thread_alloc(int pages); int thread_alloc_stack(struct thread *, int pages); int thread_check_susp(struct thread *td, bool sleep); void thread_cow_get_proc(struct thread *newtd, struct proc *p); void thread_cow_get(struct thread *newtd, struct thread *td); void thread_cow_free(struct thread *td); void thread_cow_update(struct thread *td); int thread_create(struct thread *td, struct rtprio *rtp, int (*initialize_thread)(struct thread *, void *), void *thunk); void thread_exit(void) __dead2; void thread_free(struct thread *td); void thread_link(struct thread *td, struct proc *p); void thread_reap_barrier(void); int thread_single(struct proc *p, int how); void thread_single_end(struct proc *p, int how); void thread_stash(struct thread *td); void thread_stopped(struct proc *p); void childproc_stopped(struct proc *child, int reason); void childproc_continued(struct proc *child); void childproc_exited(struct proc *child); void thread_run_flash(struct thread *td); int thread_suspend_check(int how); bool thread_suspend_check_needed(void); void thread_suspend_switch(struct thread *, struct proc *p); void thread_suspend_one(struct thread *td); void thread_unlink(struct thread *td); void thread_unsuspend(struct proc *p); void thread_wait(struct proc *p); void stop_all_proc(void); void resume_all_proc(void); static __inline int curthread_pflags_set(int flags) { struct thread *td; int save; td = curthread; save = ~flags | (td->td_pflags & flags); td->td_pflags |= flags; return (save); } static __inline void curthread_pflags_restore(int save) { curthread->td_pflags &= save; } static __inline int curthread_pflags2_set(int flags) { struct thread *td; int save; td = curthread; save = ~flags | (td->td_pflags2 & flags); td->td_pflags2 |= flags; return (save); } static __inline void curthread_pflags2_restore(int save) { curthread->td_pflags2 &= save; } static __inline bool kstack_contains(struct thread *td, vm_offset_t va, size_t len) { return (va >= td->td_kstack && va + len >= va && va + len <= td->td_kstack + td->td_kstack_pages * PAGE_SIZE); } static __inline __pure2 struct td_sched * td_get_sched(struct thread *td) { return ((struct td_sched *)&td[1]); } extern void (*softdep_ast_cleanup)(struct thread *); static __inline void td_softdep_cleanup(struct thread *td) { if (td->td_su != NULL && softdep_ast_cleanup != NULL) softdep_ast_cleanup(td); } #define PROC_ID_PID 0 #define PROC_ID_GROUP 1 #define PROC_ID_SESSION 2 #define PROC_ID_REAP 3 void proc_id_set(int type, pid_t id); void proc_id_set_cond(int type, pid_t id); void proc_id_clear(int type, pid_t id); EVENTHANDLER_LIST_DECLARE(process_ctor); EVENTHANDLER_LIST_DECLARE(process_dtor); EVENTHANDLER_LIST_DECLARE(process_init); EVENTHANDLER_LIST_DECLARE(process_fini); EVENTHANDLER_LIST_DECLARE(process_exit); EVENTHANDLER_LIST_DECLARE(process_fork); EVENTHANDLER_LIST_DECLARE(process_exec); EVENTHANDLER_LIST_DECLARE(thread_ctor); EVENTHANDLER_LIST_DECLARE(thread_dtor); EVENTHANDLER_LIST_DECLARE(thread_init); #endif /* _KERNEL */ #endif /* !_SYS_PROC_H_ */