d/freebsd-nq
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

arm: move signal delivery code to exec_machdep.c

Browse Source 
(cherry picked from commit dfaf65023e)
This commit is contained in:
Konstantin Belousov 2021-10-04 14:39:11 +03:00
parent d89b478876
commit 6a54fd55de
3 changed files with 380 additions and 322 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

379
sys/arm/arm/exec_machdep.c Normal file
View File

@ -0,0 +1,379 @@
/* $NetBSD: arm32_machdep.c,v 1.44 2004/03/24 15:34:47 atatat Exp $ */
/*-
* SPDX-License-Identifier: BSD-4-Clause
*
* Copyright (c) 2004 Olivier Houchard
* Copyright (c) 1994-1998 Mark Brinicombe.
* Copyright (c) 1994 Brini.
* All rights reserved.
*
* This code is derived from software written for Brini by Mark Brinicombe
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by Mark Brinicombe
* for the NetBSD Project.
* 4. The name of the company nor the name of the author may be used to
* endorse or promote products derived from this software without specific
* prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
* IN NO EVENT SHALL THE AUTHOR 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 <sys/cdefs.h>
__FBSDID("$FreeBSD$");
#include <sys/param.h>
#include <sys/imgact.h>
#include <sys/kdb.h>
#include <sys/kernel.h>
#include <sys/ktr.h>
#include <sys/lock.h>
#include <sys/mutex.h>
#include <sys/proc.h>
#include <sys/rwlock.h>
#include <sys/syscallsubr.h>
#include <sys/sysent.h>
#include <sys/sysproto.h>
#include <sys/vmmeter.h>
#include <machine/asm.h>
#include <machine/machdep.h>
#include <machine/pcb.h>
#include <machine/sysarch.h>
#include <machine/vfp.h>
#include <machine/vmparam.h>
/*
* Clear registers on exec
*/
void
exec_setregs(struct thread *td, struct image_params *imgp, uintptr_t stack)
{
struct trapframe *tf = td->td_frame;
memset(tf, 0, sizeof(*tf));
tf->tf_usr_sp = stack;
tf->tf_usr_lr = imgp->entry_addr;
tf->tf_svc_lr = 0x77777777;
tf->tf_pc = imgp->entry_addr;
tf->tf_spsr = PSR_USR32_MODE;
if ((register_t)imgp->entry_addr & 1)
tf->tf_spsr |= PSR_T;
}
#ifdef VFP
/*
* Get machine VFP context.
*/
void
get_vfpcontext(struct thread *td, mcontext_vfp_t *vfp)
{
struct pcb *pcb;
pcb = td->td_pcb;
if (td == curthread) {
critical_enter();
vfp_store(&pcb->pcb_vfpstate, false);
critical_exit();
} else
MPASS(TD_IS_SUSPENDED(td));
memcpy(vfp->mcv_reg, pcb->pcb_vfpstate.reg,
sizeof(vfp->mcv_reg));
vfp->mcv_fpscr = pcb->pcb_vfpstate.fpscr;
}
/*
* Set machine VFP context.
*/
void
set_vfpcontext(struct thread *td, mcontext_vfp_t *vfp)
{
struct pcb *pcb;
pcb = td->td_pcb;
if (td == curthread) {
critical_enter();
vfp_discard(td);
critical_exit();
} else
MPASS(TD_IS_SUSPENDED(td));
memcpy(pcb->pcb_vfpstate.reg, vfp->mcv_reg,
sizeof(pcb->pcb_vfpstate.reg));
pcb->pcb_vfpstate.fpscr = vfp->mcv_fpscr;
}
#endif
int
arm_get_vfpstate(struct thread *td, void *args)
{
int rv;
struct arm_get_vfpstate_args ua;
mcontext_vfp_t mcontext_vfp;
rv = copyin(args, &ua, sizeof(ua));
if (rv != 0)
return (rv);
if (ua.mc_vfp_size != sizeof(mcontext_vfp_t))
return (EINVAL);
#ifdef VFP
get_vfpcontext(td, &mcontext_vfp);
#else
bzero(&mcontext_vfp, sizeof(mcontext_vfp));
#endif
rv = copyout(&mcontext_vfp, ua.mc_vfp, sizeof(mcontext_vfp));
if (rv != 0)
return (rv);
return (0);
}
/*
* Get machine context.
*/
int
get_mcontext(struct thread *td, mcontext_t *mcp, int clear_ret)
{
struct trapframe *tf = td->td_frame;
__greg_t *gr = mcp->__gregs;
if (clear_ret & GET_MC_CLEAR_RET) {
gr[_REG_R0] = 0;
gr[_REG_CPSR] = tf->tf_spsr & ~PSR_C;
} else {
gr[_REG_R0] = tf->tf_r0;
gr[_REG_CPSR] = tf->tf_spsr;
}
gr[_REG_R1] = tf->tf_r1;
gr[_REG_R2] = tf->tf_r2;
gr[_REG_R3] = tf->tf_r3;
gr[_REG_R4] = tf->tf_r4;
gr[_REG_R5] = tf->tf_r5;
gr[_REG_R6] = tf->tf_r6;
gr[_REG_R7] = tf->tf_r7;
gr[_REG_R8] = tf->tf_r8;
gr[_REG_R9] = tf->tf_r9;
gr[_REG_R10] = tf->tf_r10;
gr[_REG_R11] = tf->tf_r11;
gr[_REG_R12] = tf->tf_r12;
gr[_REG_SP] = tf->tf_usr_sp;
gr[_REG_LR] = tf->tf_usr_lr;
gr[_REG_PC] = tf->tf_pc;
mcp->mc_vfp_size = 0;
mcp->mc_vfp_ptr = NULL;
memset(&mcp->mc_spare, 0, sizeof(mcp->mc_spare));
return (0);
}
/*
* Set machine context.
*
* However, we don't set any but the user modifiable flags, and we won't
* touch the cs selector.
*/
int
set_mcontext(struct thread *td, mcontext_t *mcp)
{
mcontext_vfp_t mc_vfp, *vfp;
struct trapframe *tf = td->td_frame;
const __greg_t *gr = mcp->__gregs;
int spsr;
/*
* Make sure the processor mode has not been tampered with and
* interrupts have not been disabled.
*/
spsr = gr[_REG_CPSR];
if ((spsr & PSR_MODE) != PSR_USR32_MODE ||
(spsr & (PSR_I | PSR_F)) != 0)
return (EINVAL);
#ifdef WITNESS
if (mcp->mc_vfp_size != 0 && mcp->mc_vfp_size != sizeof(mc_vfp)) {
printf("%s: %s: Malformed mc_vfp_size: %d (0x%08X)\n",
td->td_proc->p_comm, __func__,
mcp->mc_vfp_size, mcp->mc_vfp_size);
} else if (mcp->mc_vfp_size != 0 && mcp->mc_vfp_ptr == NULL) {
printf("%s: %s: c_vfp_size != 0 but mc_vfp_ptr == NULL\n",
td->td_proc->p_comm, __func__);
}
#endif
if (mcp->mc_vfp_size == sizeof(mc_vfp) && mcp->mc_vfp_ptr != NULL) {
if (copyin(mcp->mc_vfp_ptr, &mc_vfp, sizeof(mc_vfp)) != 0)
return (EFAULT);
vfp = &mc_vfp;
} else {
vfp = NULL;
}
tf->tf_r0 = gr[_REG_R0];
tf->tf_r1 = gr[_REG_R1];
tf->tf_r2 = gr[_REG_R2];
tf->tf_r3 = gr[_REG_R3];
tf->tf_r4 = gr[_REG_R4];
tf->tf_r5 = gr[_REG_R5];
tf->tf_r6 = gr[_REG_R6];
tf->tf_r7 = gr[_REG_R7];
tf->tf_r8 = gr[_REG_R8];
tf->tf_r9 = gr[_REG_R9];
tf->tf_r10 = gr[_REG_R10];
tf->tf_r11 = gr[_REG_R11];
tf->tf_r12 = gr[_REG_R12];
tf->tf_usr_sp = gr[_REG_SP];
tf->tf_usr_lr = gr[_REG_LR];
tf->tf_pc = gr[_REG_PC];
tf->tf_spsr = gr[_REG_CPSR];
#ifdef VFP
if (vfp != NULL)
set_vfpcontext(td, vfp);
#endif
return (0);
}
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;
struct sysentvec *sysent;
int onstack;
int sig;
int code;
td = curthread;
p = td->td_proc;
PROC_LOCK_ASSERT(p, MA_OWNED);
sig = ksi->ksi_signo;
code = ksi->ksi_code;
psp = p->p_sigacts;
mtx_assert(&psp->ps_mtx, MA_OWNED);
tf = td->td_frame;
onstack = sigonstack(tf->tf_usr_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 +
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_usr_sp;
/* make room on the stack */
fp--;
/* make the stack aligned */
fp = (struct sigframe *)STACKALIGN(fp);
/* Populate the siginfo frame. */
bzero(&frame, sizeof(frame));
get_mcontext(td, &frame.sf_uc.uc_mcontext, 0);
#ifdef VFP
get_vfpcontext(td, &frame.sf_vfp);
frame.sf_uc.uc_mcontext.mc_vfp_size = sizeof(fp->sf_vfp);
frame.sf_uc.uc_mcontext.mc_vfp_ptr = &fp->sf_vfp;
#else
frame.sf_uc.uc_mcontext.mc_vfp_size = 0;
frame.sf_uc.uc_mcontext.mc_vfp_ptr = NULL;
#endif
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);
/* 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);
}
/*
* Build context to run handler in. We invoke the handler
* directly, only returning via the trampoline. Note the
* trampoline version numbers are coordinated with machine-
* dependent code in libc.
*/
tf->tf_r0 = sig;
tf->tf_r1 = (register_t)&fp->sf_si;
tf->tf_r2 = (register_t)&fp->sf_uc;
/* the trampoline uses r5 as the uc address */
tf->tf_r5 = (register_t)&fp->sf_uc;
tf->tf_pc = (register_t)catcher;
tf->tf_usr_sp = (register_t)fp;
sysent = p->p_sysent;
if (sysent->sv_sigcode_base != 0)
tf->tf_usr_lr = (register_t)sysent->sv_sigcode_base;
else
tf->tf_usr_lr = (register_t)(sysent->sv_psstrings -
*(sysent->sv_szsigcode));
/* Set the mode to enter in the signal handler */
#if __ARM_ARCH >= 7
if ((register_t)catcher & 1)
tf->tf_spsr |= PSR_T;
else
tf->tf_spsr &= ~PSR_T;
#endif
CTR3(KTR_SIG, "sendsig: return td=%p pc=%#x sp=%#x", td, tf->tf_usr_lr,
tf->tf_usr_sp);
PROC_LOCK(p);
mtx_lock(&psp->ps_mtx);
}
int
sys_sigreturn(struct thread *td, struct sigreturn_args *uap)
{
ucontext_t uc;
int error;
if (uap == NULL)
return (EFAULT);
if (copyin(uap->sigcntxp, &uc, sizeof(uc)))
return (EFAULT);
/* Restore register context. */
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);
}

322
sys/arm/arm/machdep.c
View File

@ -337,328 +337,6 @@ spinlock_exit(void)
}
}
/*
* Clear registers on exec
*/
void
exec_setregs(struct thread *td, struct image_params *imgp, uintptr_t stack)
{
struct trapframe *tf = td->td_frame;
memset(tf, 0, sizeof(*tf));
tf->tf_usr_sp = stack;
tf->tf_usr_lr = imgp->entry_addr;
tf->tf_svc_lr = 0x77777777;
tf->tf_pc = imgp->entry_addr;
tf->tf_spsr = PSR_USR32_MODE;
if ((register_t)imgp->entry_addr & 1)
tf->tf_spsr |= PSR_T;
}
#ifdef VFP
/*
* Get machine VFP context.
*/
void
get_vfpcontext(struct thread *td, mcontext_vfp_t *vfp)
{
struct pcb *pcb;
pcb = td->td_pcb;
if (td == curthread) {
critical_enter();
vfp_store(&pcb->pcb_vfpstate, false);
critical_exit();
} else
MPASS(TD_IS_SUSPENDED(td));
memcpy(vfp->mcv_reg, pcb->pcb_vfpstate.reg,
sizeof(vfp->mcv_reg));
vfp->mcv_fpscr = pcb->pcb_vfpstate.fpscr;
}
/*
* Set machine VFP context.
*/
void
set_vfpcontext(struct thread *td, mcontext_vfp_t *vfp)
{
struct pcb *pcb;
pcb = td->td_pcb;
if (td == curthread) {
critical_enter();
vfp_discard(td);
critical_exit();
} else
MPASS(TD_IS_SUSPENDED(td));
memcpy(pcb->pcb_vfpstate.reg, vfp->mcv_reg,
sizeof(pcb->pcb_vfpstate.reg));
pcb->pcb_vfpstate.fpscr = vfp->mcv_fpscr;
}
#endif
int
arm_get_vfpstate(struct thread *td, void *args)
{
int rv;
struct arm_get_vfpstate_args ua;
mcontext_vfp_t mcontext_vfp;
rv = copyin(args, &ua, sizeof(ua));
if (rv != 0)
return (rv);
if (ua.mc_vfp_size != sizeof(mcontext_vfp_t))
return (EINVAL);
#ifdef VFP
get_vfpcontext(td, &mcontext_vfp);
#else
bzero(&mcontext_vfp, sizeof(mcontext_vfp));
#endif
rv = copyout(&mcontext_vfp, ua.mc_vfp, sizeof(mcontext_vfp));
if (rv != 0)
return (rv);
return (0);
}
/*
* Get machine context.
*/
int
get_mcontext(struct thread *td, mcontext_t *mcp, int clear_ret)
{
struct trapframe *tf = td->td_frame;
__greg_t *gr = mcp->__gregs;
if (clear_ret & GET_MC_CLEAR_RET) {
gr[_REG_R0] = 0;
gr[_REG_CPSR] = tf->tf_spsr & ~PSR_C;
} else {
gr[_REG_R0] = tf->tf_r0;
gr[_REG_CPSR] = tf->tf_spsr;
}
gr[_REG_R1] = tf->tf_r1;
gr[_REG_R2] = tf->tf_r2;
gr[_REG_R3] = tf->tf_r3;
gr[_REG_R4] = tf->tf_r4;
gr[_REG_R5] = tf->tf_r5;
gr[_REG_R6] = tf->tf_r6;
gr[_REG_R7] = tf->tf_r7;
gr[_REG_R8] = tf->tf_r8;
gr[_REG_R9] = tf->tf_r9;
gr[_REG_R10] = tf->tf_r10;
gr[_REG_R11] = tf->tf_r11;
gr[_REG_R12] = tf->tf_r12;
gr[_REG_SP] = tf->tf_usr_sp;
gr[_REG_LR] = tf->tf_usr_lr;
gr[_REG_PC] = tf->tf_pc;
mcp->mc_vfp_size = 0;
mcp->mc_vfp_ptr = NULL;
memset(&mcp->mc_spare, 0, sizeof(mcp->mc_spare));
return (0);
}
/*
* Set machine context.
*
* However, we don't set any but the user modifiable flags, and we won't
* touch the cs selector.
*/
int
set_mcontext(struct thread *td, mcontext_t *mcp)
{
mcontext_vfp_t mc_vfp, *vfp;
struct trapframe *tf = td->td_frame;
const __greg_t *gr = mcp->__gregs;
int spsr;
/*
* Make sure the processor mode has not been tampered with and
* interrupts have not been disabled.
*/
spsr = gr[_REG_CPSR];
if ((spsr & PSR_MODE) != PSR_USR32_MODE ||
(spsr & (PSR_I | PSR_F)) != 0)
return (EINVAL);
#ifdef WITNESS
if (mcp->mc_vfp_size != 0 && mcp->mc_vfp_size != sizeof(mc_vfp)) {
printf("%s: %s: Malformed mc_vfp_size: %d (0x%08X)\n",
td->td_proc->p_comm, __func__,
mcp->mc_vfp_size, mcp->mc_vfp_size);
} else if (mcp->mc_vfp_size != 0 && mcp->mc_vfp_ptr == NULL) {
printf("%s: %s: c_vfp_size != 0 but mc_vfp_ptr == NULL\n",
td->td_proc->p_comm, __func__);
}
#endif
if (mcp->mc_vfp_size == sizeof(mc_vfp) && mcp->mc_vfp_ptr != NULL) {
if (copyin(mcp->mc_vfp_ptr, &mc_vfp, sizeof(mc_vfp)) != 0)
return (EFAULT);
vfp = &mc_vfp;
} else {
vfp = NULL;
}
tf->tf_r0 = gr[_REG_R0];
tf->tf_r1 = gr[_REG_R1];
tf->tf_r2 = gr[_REG_R2];
tf->tf_r3 = gr[_REG_R3];
tf->tf_r4 = gr[_REG_R4];
tf->tf_r5 = gr[_REG_R5];
tf->tf_r6 = gr[_REG_R6];
tf->tf_r7 = gr[_REG_R7];
tf->tf_r8 = gr[_REG_R8];
tf->tf_r9 = gr[_REG_R9];
tf->tf_r10 = gr[_REG_R10];
tf->tf_r11 = gr[_REG_R11];
tf->tf_r12 = gr[_REG_R12];
tf->tf_usr_sp = gr[_REG_SP];
tf->tf_usr_lr = gr[_REG_LR];
tf->tf_pc = gr[_REG_PC];
tf->tf_spsr = gr[_REG_CPSR];
#ifdef VFP
if (vfp != NULL)
set_vfpcontext(td, vfp);
#endif
return (0);
}
void
sendsig(catcher, ksi, mask)
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;
struct sysentvec *sysent;
int onstack;
int sig;
int code;
td = curthread;
p = td->td_proc;
PROC_LOCK_ASSERT(p, MA_OWNED);
sig = ksi->ksi_signo;
code = ksi->ksi_code;
psp = p->p_sigacts;
mtx_assert(&psp->ps_mtx, MA_OWNED);
tf = td->td_frame;
onstack = sigonstack(tf->tf_usr_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 +
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_usr_sp;
/* make room on the stack */
fp--;
/* make the stack aligned */
fp = (struct sigframe *)STACKALIGN(fp);
/* Populate the siginfo frame. */
bzero(&frame, sizeof(frame));
get_mcontext(td, &frame.sf_uc.uc_mcontext, 0);
#ifdef VFP
get_vfpcontext(td, &frame.sf_vfp);
frame.sf_uc.uc_mcontext.mc_vfp_size = sizeof(fp->sf_vfp);
frame.sf_uc.uc_mcontext.mc_vfp_ptr = &fp->sf_vfp;
#else
frame.sf_uc.uc_mcontext.mc_vfp_size = 0;
frame.sf_uc.uc_mcontext.mc_vfp_ptr = NULL;
#endif
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);
/* 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);
}
/*
* Build context to run handler in. We invoke the handler
* directly, only returning via the trampoline. Note the
* trampoline version numbers are coordinated with machine-
* dependent code in libc.
*/
tf->tf_r0 = sig;
tf->tf_r1 = (register_t)&fp->sf_si;
tf->tf_r2 = (register_t)&fp->sf_uc;
/* the trampoline uses r5 as the uc address */
tf->tf_r5 = (register_t)&fp->sf_uc;
tf->tf_pc = (register_t)catcher;
tf->tf_usr_sp = (register_t)fp;
sysent = p->p_sysent;
if (sysent->sv_sigcode_base != 0)
tf->tf_usr_lr = (register_t)sysent->sv_sigcode_base;
else
tf->tf_usr_lr = (register_t)(sysent->sv_psstrings -
*(sysent->sv_szsigcode));
/* Set the mode to enter in the signal handler */
#if __ARM_ARCH >= 7
if ((register_t)catcher & 1)
tf->tf_spsr |= PSR_T;
else
tf->tf_spsr &= ~PSR_T;
#endif
CTR3(KTR_SIG, "sendsig: return td=%p pc=%#x sp=%#x", td, tf->tf_usr_lr,
tf->tf_usr_sp);
PROC_LOCK(p);
mtx_lock(&psp->ps_mtx);
}
int
sys_sigreturn(td, uap)
struct thread *td;
struct sigreturn_args /* {
const struct __ucontext *sigcntxp;
} */ *uap;
{
ucontext_t uc;
int error;
if (uap == NULL)
return (EFAULT);
if (copyin(uap->sigcntxp, &uc, sizeof(uc)))
return (EFAULT);
/* Restore register context. */
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);
}
/*
* Construct a PCB from a trapframe. This is called from kdb_trap() where
* we want to start a backtrace from the function that caused us to enter

1
sys/conf/files.arm
View File

@ -25,6 +25,7 @@ arm/arm/dump_machdep.c standard
arm/arm/elf_machdep.c standard
arm/arm/elf_note.S standard
arm/arm/exception.S standard
arm/arm/exec_machdep.c standard
arm/arm/fiq.c standard
arm/arm/fiq_subr.S standard
arm/arm/fusu.S standard