diff --git a/sys/arm64/arm64/exec_machdep.c b/sys/arm64/arm64/exec_machdep.c index 52c63f801693..1bff70450b69 100644 --- a/sys/arm64/arm64/exec_machdep.c +++ b/sys/arm64/arm64/exec_machdep.c @@ -1,667 +1,740 @@ /*- * 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 #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 _Static_assert(sizeof(mcontext_t) == 880, "mcontext_t size incorrect"); _Static_assert(sizeof(ucontext_t) == 960, "ucontext_t size incorrect"); _Static_assert(sizeof(siginfo_t) == 80, "siginfo_t size incorrect"); static void get_fpcontext(struct thread *td, mcontext_t *mcp); static void set_fpcontext(struct thread *td, mcontext_t *mcp); int fill_regs(struct thread *td, struct reg *regs) { struct trapframe *frame; frame = td->td_frame; regs->sp = frame->tf_sp; regs->lr = frame->tf_lr; regs->elr = frame->tf_elr; regs->spsr = frame->tf_spsr; memcpy(regs->x, frame->tf_x, sizeof(regs->x)); #ifdef COMPAT_FREEBSD32 /* * We may be called here for a 32bits process, if we're using a * 64bits debugger. If so, put PC and SPSR where it expects it. */ if (SV_PROC_FLAG(td->td_proc, SV_ILP32)) { regs->x[15] = frame->tf_elr; regs->x[16] = frame->tf_spsr; } #endif return (0); } int set_regs(struct thread *td, struct reg *regs) { struct trapframe *frame; frame = td->td_frame; frame->tf_sp = regs->sp; frame->tf_lr = regs->lr; memcpy(frame->tf_x, regs->x, sizeof(frame->tf_x)); #ifdef COMPAT_FREEBSD32 if (SV_PROC_FLAG(td->td_proc, SV_ILP32)) { /* * We may be called for a 32bits process if we're using * a 64bits debugger. If so, get PC and SPSR from where * it put it. */ frame->tf_elr = regs->x[15]; frame->tf_spsr &= ~PSR_SETTABLE_32; frame->tf_spsr |= regs->x[16] & PSR_SETTABLE_32; /* Don't allow userspace to ask to continue single stepping. * The SPSR.SS field doesn't exist when the EL1 is AArch32. * As the SPSR.DIT field has moved in its place don't * allow userspace to set the SPSR.SS field. */ } else #endif { frame->tf_elr = regs->elr; /* * frame->tf_spsr and regs->spsr on FreeBSD 13 was 32-bit * where from 14 they are 64 bit. As PSR_SETTABLE_64 clears * the upper 32 bits no compatibility handling is needed, * however if this is ever not the case we will need to add * these, similar to how it is done in set_mcontext. */ frame->tf_spsr &= ~PSR_SETTABLE_64; frame->tf_spsr |= regs->spsr & PSR_SETTABLE_64; /* Enable single stepping if userspace asked fot it */ if ((frame->tf_spsr & PSR_SS) != 0) { td->td_pcb->pcb_flags |= PCB_SINGLE_STEP; WRITE_SPECIALREG(mdscr_el1, READ_SPECIALREG(mdscr_el1) | MDSCR_SS); isb(); } } return (0); } int fill_fpregs(struct thread *td, struct fpreg *regs) { #ifdef VFP struct pcb *pcb; pcb = td->td_pcb; if ((pcb->pcb_fpflags & PCB_FP_STARTED) != 0) { /* * If we have just been running VFP instructions we will * need to save the state to memcpy it below. */ if (td == curthread) vfp_save_state(td, pcb); } KASSERT(pcb->pcb_fpusaved == &pcb->pcb_fpustate, ("Called fill_fpregs while the kernel is using the VFP")); memcpy(regs->fp_q, pcb->pcb_fpustate.vfp_regs, sizeof(regs->fp_q)); regs->fp_cr = pcb->pcb_fpustate.vfp_fpcr; regs->fp_sr = pcb->pcb_fpustate.vfp_fpsr; #else memset(regs, 0, sizeof(*regs)); #endif return (0); } int set_fpregs(struct thread *td, struct fpreg *regs) { #ifdef VFP struct pcb *pcb; pcb = td->td_pcb; KASSERT(pcb->pcb_fpusaved == &pcb->pcb_fpustate, ("Called set_fpregs while the kernel is using the VFP")); memcpy(pcb->pcb_fpustate.vfp_regs, regs->fp_q, sizeof(regs->fp_q)); pcb->pcb_fpustate.vfp_fpcr = regs->fp_cr; pcb->pcb_fpustate.vfp_fpsr = regs->fp_sr; #endif return (0); } int fill_dbregs(struct thread *td, struct dbreg *regs) { struct debug_monitor_state *monitor; int i; uint8_t debug_ver, nbkpts, nwtpts; memset(regs, 0, sizeof(*regs)); extract_user_id_field(ID_AA64DFR0_EL1, ID_AA64DFR0_DebugVer_SHIFT, &debug_ver); extract_user_id_field(ID_AA64DFR0_EL1, ID_AA64DFR0_BRPs_SHIFT, &nbkpts); extract_user_id_field(ID_AA64DFR0_EL1, ID_AA64DFR0_WRPs_SHIFT, &nwtpts); /* * The BRPs field contains the number of breakpoints - 1. Armv8-A * allows the hardware to provide 2-16 breakpoints so this won't * overflow an 8 bit value. The same applies to the WRPs field. */ nbkpts++; nwtpts++; regs->db_debug_ver = debug_ver; regs->db_nbkpts = nbkpts; regs->db_nwtpts = nwtpts; monitor = &td->td_pcb->pcb_dbg_regs; if ((monitor->dbg_flags & DBGMON_ENABLED) != 0) { for (i = 0; i < nbkpts; i++) { regs->db_breakregs[i].dbr_addr = monitor->dbg_bvr[i]; regs->db_breakregs[i].dbr_ctrl = monitor->dbg_bcr[i]; } for (i = 0; i < nwtpts; i++) { regs->db_watchregs[i].dbw_addr = monitor->dbg_wvr[i]; regs->db_watchregs[i].dbw_ctrl = monitor->dbg_wcr[i]; } } return (0); } int set_dbregs(struct thread *td, struct dbreg *regs) { struct debug_monitor_state *monitor; uint64_t addr; uint32_t ctrl; int i; monitor = &td->td_pcb->pcb_dbg_regs; monitor->dbg_enable_count = 0; for (i = 0; i < DBG_BRP_MAX; i++) { addr = regs->db_breakregs[i].dbr_addr; ctrl = regs->db_breakregs[i].dbr_ctrl; /* * Don't let the user set a breakpoint on a kernel or * non-canonical user address. */ if (addr >= VM_MAXUSER_ADDRESS) return (EINVAL); /* * The lowest 2 bits are ignored, so record the effective * address. */ addr = rounddown2(addr, 4); /* * Some control fields are ignored, and other bits reserved. * Only unlinked, address-matching breakpoints are supported. * * XXX: fields that appear unvalidated, such as BAS, have * constrained undefined behaviour. If the user mis-programs * these, there is no risk to the system. */ ctrl &= DBGBCR_EN | DBGBCR_PMC | DBGBCR_BAS; if ((ctrl & DBGBCR_EN) != 0) { /* Only target EL0. */ if ((ctrl & DBGBCR_PMC) != DBGBCR_PMC_EL0) return (EINVAL); monitor->dbg_enable_count++; } monitor->dbg_bvr[i] = addr; monitor->dbg_bcr[i] = ctrl; } for (i = 0; i < DBG_WRP_MAX; i++) { addr = regs->db_watchregs[i].dbw_addr; ctrl = regs->db_watchregs[i].dbw_ctrl; /* * Don't let the user set a watchpoint on a kernel or * non-canonical user address. */ if (addr >= VM_MAXUSER_ADDRESS) return (EINVAL); /* * Some control fields are ignored, and other bits reserved. * Only unlinked watchpoints are supported. */ ctrl &= DBGWCR_EN | DBGWCR_PAC | DBGWCR_LSC | DBGWCR_BAS | DBGWCR_MASK; if ((ctrl & DBGWCR_EN) != 0) { /* Only target EL0. */ if ((ctrl & DBGWCR_PAC) != DBGWCR_PAC_EL0) return (EINVAL); /* Must set at least one of the load/store bits. */ if ((ctrl & DBGWCR_LSC) == 0) return (EINVAL); /* * When specifying the address range with BAS, the MASK * field must be zero. */ if ((ctrl & DBGWCR_BAS) != DBGWCR_BAS && (ctrl & DBGWCR_MASK) != 0) return (EINVAL); monitor->dbg_enable_count++; } monitor->dbg_wvr[i] = addr; monitor->dbg_wcr[i] = ctrl; } if (monitor->dbg_enable_count > 0) monitor->dbg_flags |= DBGMON_ENABLED; return (0); } #ifdef COMPAT_FREEBSD32 int fill_regs32(struct thread *td, struct reg32 *regs) { int i; struct trapframe *tf; tf = td->td_frame; for (i = 0; i < 13; i++) regs->r[i] = tf->tf_x[i]; /* For arm32, SP is r13 and LR is r14 */ regs->r_sp = tf->tf_x[13]; regs->r_lr = tf->tf_x[14]; regs->r_pc = tf->tf_elr; regs->r_cpsr = tf->tf_spsr; return (0); } int set_regs32(struct thread *td, struct reg32 *regs) { int i; struct trapframe *tf; tf = td->td_frame; for (i = 0; i < 13; i++) tf->tf_x[i] = regs->r[i]; /* For arm 32, SP is r13 an LR is r14 */ tf->tf_x[13] = regs->r_sp; tf->tf_x[14] = regs->r_lr; tf->tf_elr = regs->r_pc; tf->tf_spsr &= ~PSR_SETTABLE_32; tf->tf_spsr |= regs->r_cpsr & PSR_SETTABLE_32; return (0); } /* XXX fill/set dbregs/fpregs are stubbed on 32-bit arm. */ int fill_fpregs32(struct thread *td, struct fpreg32 *regs) { memset(regs, 0, sizeof(*regs)); return (0); } int set_fpregs32(struct thread *td, struct fpreg32 *regs) { return (0); } int fill_dbregs32(struct thread *td, struct dbreg32 *regs) { memset(regs, 0, sizeof(*regs)); return (0); } int set_dbregs32(struct thread *td, struct dbreg32 *regs) { return (0); } #endif void exec_setregs(struct thread *td, struct image_params *imgp, uintptr_t stack) { struct trapframe *tf = td->td_frame; struct pcb *pcb = td->td_pcb; memset(tf, 0, sizeof(struct trapframe)); tf->tf_x[0] = stack; tf->tf_sp = STACKALIGN(stack); tf->tf_lr = imgp->entry_addr; tf->tf_elr = imgp->entry_addr; td->td_pcb->pcb_tpidr_el0 = 0; td->td_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)); /* Generate new pointer authentication keys */ ptrauth_exec(td); } /* Sanity check these are the same size, they will be memcpy'd to and from */ CTASSERT(sizeof(((struct trapframe *)0)->tf_x) == sizeof((struct gpregs *)0)->gp_x); CTASSERT(sizeof(((struct trapframe *)0)->tf_x) == sizeof((struct reg *)0)->x); int get_mcontext(struct thread *td, mcontext_t *mcp, int clear_ret) { struct trapframe *tf = td->td_frame; if (clear_ret & GET_MC_CLEAR_RET) { mcp->mc_gpregs.gp_x[0] = 0; mcp->mc_gpregs.gp_spsr = tf->tf_spsr & ~PSR_C; } else { mcp->mc_gpregs.gp_x[0] = tf->tf_x[0]; mcp->mc_gpregs.gp_spsr = tf->tf_spsr; } memcpy(&mcp->mc_gpregs.gp_x[1], &tf->tf_x[1], sizeof(mcp->mc_gpregs.gp_x[1]) * (nitems(mcp->mc_gpregs.gp_x) - 1)); mcp->mc_gpregs.gp_sp = tf->tf_sp; mcp->mc_gpregs.gp_lr = tf->tf_lr; mcp->mc_gpregs.gp_elr = tf->tf_elr; get_fpcontext(td, mcp); return (0); } int set_mcontext(struct thread *td, mcontext_t *mcp) { #define PSR_13_MASK 0xfffffffful + struct arm64_reg_context ctx; struct trapframe *tf = td->td_frame; uint64_t spsr; + vm_offset_t addr; + int error; + bool done; spsr = mcp->mc_gpregs.gp_spsr; #ifdef COMPAT_FREEBSD13 if (td->td_proc->p_osrel < P_OSREL_ARM64_SPSR) { /* * Before FreeBSD 14 gp_spsr was 32 bit. The size of mc_gpregs * was identical because of padding so mask of the upper bits * that may be invalid on earlier releases. */ spsr &= PSR_13_MASK; } #endif if ((spsr & PSR_M_MASK) != PSR_M_EL0t || (spsr & PSR_AARCH32) != 0 || (spsr & PSR_DAIF) != (td->td_frame->tf_spsr & PSR_DAIF)) return (EINVAL); memcpy(tf->tf_x, mcp->mc_gpregs.gp_x, sizeof(tf->tf_x)); tf->tf_sp = mcp->mc_gpregs.gp_sp; tf->tf_lr = mcp->mc_gpregs.gp_lr; tf->tf_elr = mcp->mc_gpregs.gp_elr; #ifdef COMPAT_FREEBSD13 if (td->td_proc->p_osrel < P_OSREL_ARM64_SPSR) { /* Keep the upper 32 bits of spsr on older releases */ tf->tf_spsr &= ~PSR_13_MASK; tf->tf_spsr |= spsr; } else #endif tf->tf_spsr = spsr; if ((tf->tf_spsr & PSR_SS) != 0) { td->td_pcb->pcb_flags |= PCB_SINGLE_STEP; WRITE_SPECIALREG(mdscr_el1, READ_SPECIALREG(mdscr_el1) | MDSCR_SS); isb(); } + set_fpcontext(td, mcp); + /* Read any register contexts we find */ + if (mcp->mc_ptr != 0) { + addr = mcp->mc_ptr; + + done = false; + do { + if (!__is_aligned(addr, + _Alignof(struct arm64_reg_context))) + return (EINVAL); + + error = copyin((const void *)addr, &ctx, sizeof(ctx)); + if (error != 0) + return (error); + + switch (ctx.ctx_id) { + case ARM64_CTX_END: + done = true; + break; + default: + return (EINVAL); + } + + addr += ctx.ctx_size; + } while (!done); + } + return (0); #undef PSR_13_MASK } static void get_fpcontext(struct thread *td, mcontext_t *mcp) { #ifdef VFP struct pcb *curpcb; MPASS(td == curthread); curpcb = curthread->td_pcb; if ((curpcb->pcb_fpflags & PCB_FP_STARTED) != 0) { /* * If we have just been running VFP instructions we will * need to save the state to memcpy it below. */ vfp_save_state(td, curpcb); } KASSERT(curpcb->pcb_fpusaved == &curpcb->pcb_fpustate, ("Called get_fpcontext while the kernel is using the VFP")); KASSERT((curpcb->pcb_fpflags & ~PCB_FP_USERMASK) == 0, ("Non-userspace FPU flags set in get_fpcontext")); memcpy(mcp->mc_fpregs.fp_q, curpcb->pcb_fpustate.vfp_regs, sizeof(mcp->mc_fpregs.fp_q)); mcp->mc_fpregs.fp_cr = curpcb->pcb_fpustate.vfp_fpcr; mcp->mc_fpregs.fp_sr = curpcb->pcb_fpustate.vfp_fpsr; mcp->mc_fpregs.fp_flags = curpcb->pcb_fpflags; mcp->mc_flags |= _MC_FP_VALID; #endif } static void set_fpcontext(struct thread *td, mcontext_t *mcp) { #ifdef VFP struct pcb *curpcb; MPASS(td == curthread); if ((mcp->mc_flags & _MC_FP_VALID) != 0) { curpcb = curthread->td_pcb; /* * Discard any vfp state for the current thread, we * are about to override it. */ critical_enter(); vfp_discard(td); critical_exit(); KASSERT(curpcb->pcb_fpusaved == &curpcb->pcb_fpustate, ("Called set_fpcontext while the kernel is using the VFP")); memcpy(curpcb->pcb_fpustate.vfp_regs, mcp->mc_fpregs.fp_q, sizeof(mcp->mc_fpregs.fp_q)); curpcb->pcb_fpustate.vfp_fpcr = mcp->mc_fpregs.fp_cr; curpcb->pcb_fpustate.vfp_fpsr = mcp->mc_fpregs.fp_sr; curpcb->pcb_fpflags = mcp->mc_fpregs.fp_flags & PCB_FP_USERMASK; } #endif } int sys_sigreturn(struct thread *td, struct sigreturn_args *uap) { ucontext_t uc; int error; if (copyin(uap->sigcntxp, &uc, sizeof(uc))) return (EFAULT); error = set_mcontext(td, &uc.uc_mcontext); if (error != 0) return (error); /* Restore signal mask. */ kern_sigprocmask(td, SIG_SETMASK, &uc.uc_sigmask, NULL, 0); return (EJUSTRETURN); } +static bool +sendsig_ctx_end(struct thread *td, vm_offset_t *addrp) +{ + struct arm64_reg_context end_ctx; + vm_offset_t ctx_addr; + + *addrp -= sizeof(end_ctx); + ctx_addr = *addrp; + + memset(&end_ctx, 0, sizeof(end_ctx)); + end_ctx.ctx_id = ARM64_CTX_END; + end_ctx.ctx_size = sizeof(end_ctx); + + if (copyout(&end_ctx, (void *)ctx_addr, sizeof(end_ctx)) != 0) + return (false); + + return (true); +} + +typedef bool(*ctx_func)(struct thread *, vm_offset_t *); +static const ctx_func ctx_funcs[] = { + sendsig_ctx_end, /* Must be first to end the linked list */ + NULL, +}; + void sendsig(sig_t catcher, ksiginfo_t *ksi, sigset_t *mask) { struct thread *td; struct proc *p; struct trapframe *tf; struct sigframe *fp, frame; struct sigacts *psp; + vm_offset_t addr; 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 sigframe *)((uintptr_t)td->td_sigstk.ss_sp + + addr = ((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 sigframe *)td->td_frame->tf_sp; + addr = td->td_frame->tf_sp; } - /* Make room, keeping the stack aligned */ - fp--; - fp = (struct sigframe *)STACKALIGN(fp); - /* Fill in the frame to copy out */ bzero(&frame, sizeof(frame)); get_mcontext(td, &frame.sf_uc.uc_mcontext, 0); frame.sf_si = ksi->ksi_info; 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); + for (int i = 0; ctx_funcs[i] != NULL; i++) { + if (!ctx_funcs[i](td, &addr)) { + /* Process has trashed its stack. Kill it. */ + CTR4(KTR_SIG, + "sendsig: frame sigexit td=%p fp=%#lx func[%d]=%p", + td, addr, i, ctx_funcs[i]); + PROC_LOCK(p); + sigexit(td, SIGILL); + /* NOTREACHED */ + } + } + + /* Point at the first context */ + frame.sf_uc.uc_mcontext.mc_ptr = addr; + + /* Make room, keeping the stack aligned */ + fp = (struct sigframe *)addr; + fp--; + fp = (struct sigframe *)STACKALIGN(fp); + /* 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_x[8] = (register_t)catcher; tf->tf_sp = (register_t)fp; tf->tf_elr = (register_t)PROC_SIGCODE(p); /* Clear the single step flag while in the signal handler */ if ((td->td_pcb->pcb_flags & PCB_SINGLE_STEP) != 0) { td->td_pcb->pcb_flags &= ~PCB_SINGLE_STEP; WRITE_SPECIALREG(mdscr_el1, READ_SPECIALREG(mdscr_el1) & ~MDSCR_SS); isb(); } 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); } diff --git a/sys/arm64/include/ucontext.h b/sys/arm64/include/ucontext.h index e9b914315a19..dedbd061ec6b 100644 --- a/sys/arm64/include/ucontext.h +++ b/sys/arm64/include/ucontext.h @@ -1,92 +1,106 @@ /*- * Copyright (c) 2014 Andrew Turner * Copyright (c) 2014-2015 The FreeBSD Foundation * All rights reserved. * * This software was developed by Andrew Turner under * sponsorship from the FreeBSD Foundation. * * 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. */ #ifdef __arm__ #include #else /* !__arm__ */ #ifndef _MACHINE_UCONTEXT_H_ #define _MACHINE_UCONTEXT_H_ struct gpregs { __register_t gp_x[30]; __register_t gp_lr; __register_t gp_sp; __register_t gp_elr; __uint64_t gp_spsr; }; struct fpregs { __uint128_t fp_q[32]; __uint32_t fp_sr; __uint32_t fp_cr; int fp_flags; int fp_pad; }; +/* + * Support for registers that don't fit into gpregs or fpregs, e.g. SVE. + * There are some registers that have been added so are optional. To support + * these create an array of headers that point at the register data. + */ +struct arm64_reg_context { + __uint32_t ctx_id; + __uint32_t ctx_size; +}; + +#define ARM64_CTX_END 0xa5a5a5a5 + struct __mcontext { struct gpregs mc_gpregs; struct fpregs mc_fpregs; int mc_flags; #define _MC_FP_VALID 0x1 /* Set when mc_fpregs has valid data */ int mc_pad; /* Padding */ - __uint64_t mc_spare[8]; /* Space for expansion, set to zero */ + __uint64_t mc_ptr; /* Address of extra_regs struct */ + __uint64_t mc_spare[7]; /* Space for expansion, set to zero */ }; + typedef struct __mcontext mcontext_t; #ifdef COMPAT_FREEBSD32 #include typedef struct __mcontext32 { uint32_t mc_gregset[17]; uint32_t mc_vfp_size; uint32_t mc_vfp_ptr; uint32_t mc_spare[33]; } mcontext32_t; typedef struct __ucontext32 { sigset_t uc_sigmask; mcontext32_t uc_mcontext; u_int32_t uc_link; struct sigaltstack32 uc_stack; u_int32_t uc_flags; u_int32_t __spare__[4]; } ucontext32_t; typedef struct __mcontext32_vfp { __uint64_t mcv_reg[32]; __uint32_t mcv_fpscr; } mcontext32_vfp_t; #endif /* COMPAT_FREEBSD32 */ #endif /* !_MACHINE_UCONTEXT_H_ */ #endif /* !__arm__ */