| /* |
| * Copyright (C) 1991, 1992 Linus Torvalds |
| * |
| * 1997-11-28 Modified for POSIX.1b signals by Richard Henderson |
| * 2000-06-20 Pentium III FXSR, SSE support by Gareth Hughes |
| */ |
| |
| #include <linux/sched.h> |
| #include <linux/mm.h> |
| #include <linux/smp.h> |
| #include <linux/kernel.h> |
| #include <linux/signal.h> |
| #include <linux/errno.h> |
| #include <linux/wait.h> |
| #include <linux/unistd.h> |
| #include <linux/stddef.h> |
| #include <linux/personality.h> |
| #include <linux/suspend.h> |
| #include <linux/ptrace.h> |
| #include <linux/elf.h> |
| #include <linux/binfmts.h> |
| #include <asm/processor.h> |
| #include <asm/ucontext.h> |
| #include <asm/uaccess.h> |
| #include <asm/i387.h> |
| #include "sigframe_32.h" |
| |
| #define DEBUG_SIG 0 |
| |
| #define _BLOCKABLE (~(sigmask(SIGKILL) | sigmask(SIGSTOP))) |
| |
| /* |
| * Atomically swap in the new signal mask, and wait for a signal. |
| */ |
| asmlinkage int |
| sys_sigsuspend(int history0, int history1, old_sigset_t mask) |
| { |
| mask &= _BLOCKABLE; |
| spin_lock_irq(¤t->sighand->siglock); |
| current->saved_sigmask = current->blocked; |
| siginitset(¤t->blocked, mask); |
| recalc_sigpending(); |
| spin_unlock_irq(¤t->sighand->siglock); |
| |
| current->state = TASK_INTERRUPTIBLE; |
| schedule(); |
| set_thread_flag(TIF_RESTORE_SIGMASK); |
| return -ERESTARTNOHAND; |
| } |
| |
| asmlinkage int |
| sys_sigaction(int sig, const struct old_sigaction __user *act, |
| struct old_sigaction __user *oact) |
| { |
| struct k_sigaction new_ka, old_ka; |
| int ret; |
| |
| if (act) { |
| old_sigset_t mask; |
| if (!access_ok(VERIFY_READ, act, sizeof(*act)) || |
| __get_user(new_ka.sa.sa_handler, &act->sa_handler) || |
| __get_user(new_ka.sa.sa_restorer, &act->sa_restorer)) |
| return -EFAULT; |
| __get_user(new_ka.sa.sa_flags, &act->sa_flags); |
| __get_user(mask, &act->sa_mask); |
| siginitset(&new_ka.sa.sa_mask, mask); |
| } |
| |
| ret = do_sigaction(sig, act ? &new_ka : NULL, oact ? &old_ka : NULL); |
| |
| if (!ret && oact) { |
| if (!access_ok(VERIFY_WRITE, oact, sizeof(*oact)) || |
| __put_user(old_ka.sa.sa_handler, &oact->sa_handler) || |
| __put_user(old_ka.sa.sa_restorer, &oact->sa_restorer)) |
| return -EFAULT; |
| __put_user(old_ka.sa.sa_flags, &oact->sa_flags); |
| __put_user(old_ka.sa.sa_mask.sig[0], &oact->sa_mask); |
| } |
| |
| return ret; |
| } |
| |
| asmlinkage int |
| sys_sigaltstack(unsigned long ebx) |
| { |
| /* This is needed to make gcc realize it doesn't own the "struct pt_regs" */ |
| struct pt_regs *regs = (struct pt_regs *)&ebx; |
| const stack_t __user *uss = (const stack_t __user *)ebx; |
| stack_t __user *uoss = (stack_t __user *)regs->ecx; |
| |
| return do_sigaltstack(uss, uoss, regs->esp); |
| } |
| |
| |
| /* |
| * Do a signal return; undo the signal stack. |
| */ |
| |
| static int |
| restore_sigcontext(struct pt_regs *regs, struct sigcontext __user *sc, int *peax) |
| { |
| unsigned int err = 0; |
| |
| /* Always make any pending restarted system calls return -EINTR */ |
| current_thread_info()->restart_block.fn = do_no_restart_syscall; |
| |
| #define COPY(x) err |= __get_user(regs->x, &sc->x) |
| |
| #define COPY_SEG(seg) \ |
| { unsigned short tmp; \ |
| err |= __get_user(tmp, &sc->seg); \ |
| regs->x##seg = tmp; } |
| |
| #define COPY_SEG_STRICT(seg) \ |
| { unsigned short tmp; \ |
| err |= __get_user(tmp, &sc->seg); \ |
| regs->x##seg = tmp|3; } |
| |
| #define GET_SEG(seg) \ |
| { unsigned short tmp; \ |
| err |= __get_user(tmp, &sc->seg); \ |
| loadsegment(seg,tmp); } |
| |
| #define FIX_EFLAGS (X86_EFLAGS_AC | X86_EFLAGS_RF | \ |
| X86_EFLAGS_OF | X86_EFLAGS_DF | \ |
| X86_EFLAGS_TF | X86_EFLAGS_SF | X86_EFLAGS_ZF | \ |
| X86_EFLAGS_AF | X86_EFLAGS_PF | X86_EFLAGS_CF) |
| |
| GET_SEG(gs); |
| COPY_SEG(fs); |
| COPY_SEG(es); |
| COPY_SEG(ds); |
| COPY(edi); |
| COPY(esi); |
| COPY(ebp); |
| COPY(esp); |
| COPY(ebx); |
| COPY(edx); |
| COPY(ecx); |
| COPY(eip); |
| COPY_SEG_STRICT(cs); |
| COPY_SEG_STRICT(ss); |
| |
| { |
| unsigned int tmpflags; |
| err |= __get_user(tmpflags, &sc->eflags); |
| regs->eflags = (regs->eflags & ~FIX_EFLAGS) | (tmpflags & FIX_EFLAGS); |
| regs->orig_eax = -1; /* disable syscall checks */ |
| } |
| |
| { |
| struct _fpstate __user * buf; |
| err |= __get_user(buf, &sc->fpstate); |
| if (buf) { |
| if (!access_ok(VERIFY_READ, buf, sizeof(*buf))) |
| goto badframe; |
| err |= restore_i387(buf); |
| } else { |
| struct task_struct *me = current; |
| if (used_math()) { |
| clear_fpu(me); |
| clear_used_math(); |
| } |
| } |
| } |
| |
| err |= __get_user(*peax, &sc->eax); |
| return err; |
| |
| badframe: |
| return 1; |
| } |
| |
| asmlinkage int sys_sigreturn(unsigned long __unused) |
| { |
| struct pt_regs *regs = (struct pt_regs *) &__unused; |
| struct sigframe __user *frame = (struct sigframe __user *)(regs->esp - 8); |
| sigset_t set; |
| int eax; |
| |
| if (!access_ok(VERIFY_READ, frame, sizeof(*frame))) |
| goto badframe; |
| if (__get_user(set.sig[0], &frame->sc.oldmask) |
| || (_NSIG_WORDS > 1 |
| && __copy_from_user(&set.sig[1], &frame->extramask, |
| sizeof(frame->extramask)))) |
| goto badframe; |
| |
| sigdelsetmask(&set, ~_BLOCKABLE); |
| spin_lock_irq(¤t->sighand->siglock); |
| current->blocked = set; |
| recalc_sigpending(); |
| spin_unlock_irq(¤t->sighand->siglock); |
| |
| if (restore_sigcontext(regs, &frame->sc, &eax)) |
| goto badframe; |
| return eax; |
| |
| badframe: |
| if (show_unhandled_signals && printk_ratelimit()) |
| printk("%s%s[%d] bad frame in sigreturn frame:%p eip:%lx" |
| " esp:%lx oeax:%lx\n", |
| task_pid_nr(current) > 1 ? KERN_INFO : KERN_EMERG, |
| current->comm, task_pid_nr(current), frame, regs->eip, |
| regs->esp, regs->orig_eax); |
| |
| force_sig(SIGSEGV, current); |
| return 0; |
| } |
| |
| asmlinkage int sys_rt_sigreturn(unsigned long __unused) |
| { |
| struct pt_regs *regs = (struct pt_regs *) &__unused; |
| struct rt_sigframe __user *frame = (struct rt_sigframe __user *)(regs->esp - 4); |
| sigset_t set; |
| int eax; |
| |
| if (!access_ok(VERIFY_READ, frame, sizeof(*frame))) |
| goto badframe; |
| if (__copy_from_user(&set, &frame->uc.uc_sigmask, sizeof(set))) |
| goto badframe; |
| |
| sigdelsetmask(&set, ~_BLOCKABLE); |
| spin_lock_irq(¤t->sighand->siglock); |
| current->blocked = set; |
| recalc_sigpending(); |
| spin_unlock_irq(¤t->sighand->siglock); |
| |
| if (restore_sigcontext(regs, &frame->uc.uc_mcontext, &eax)) |
| goto badframe; |
| |
| if (do_sigaltstack(&frame->uc.uc_stack, NULL, regs->esp) == -EFAULT) |
| goto badframe; |
| |
| return eax; |
| |
| badframe: |
| force_sig(SIGSEGV, current); |
| return 0; |
| } |
| |
| /* |
| * Set up a signal frame. |
| */ |
| |
| static int |
| setup_sigcontext(struct sigcontext __user *sc, struct _fpstate __user *fpstate, |
| struct pt_regs *regs, unsigned long mask) |
| { |
| int tmp, err = 0; |
| |
| err |= __put_user(regs->xfs, (unsigned int __user *)&sc->fs); |
| savesegment(gs, tmp); |
| err |= __put_user(tmp, (unsigned int __user *)&sc->gs); |
| |
| err |= __put_user(regs->xes, (unsigned int __user *)&sc->es); |
| err |= __put_user(regs->xds, (unsigned int __user *)&sc->ds); |
| err |= __put_user(regs->edi, &sc->edi); |
| err |= __put_user(regs->esi, &sc->esi); |
| err |= __put_user(regs->ebp, &sc->ebp); |
| err |= __put_user(regs->esp, &sc->esp); |
| err |= __put_user(regs->ebx, &sc->ebx); |
| err |= __put_user(regs->edx, &sc->edx); |
| err |= __put_user(regs->ecx, &sc->ecx); |
| err |= __put_user(regs->eax, &sc->eax); |
| err |= __put_user(current->thread.trap_no, &sc->trapno); |
| err |= __put_user(current->thread.error_code, &sc->err); |
| err |= __put_user(regs->eip, &sc->eip); |
| err |= __put_user(regs->xcs, (unsigned int __user *)&sc->cs); |
| err |= __put_user(regs->eflags, &sc->eflags); |
| err |= __put_user(regs->esp, &sc->esp_at_signal); |
| err |= __put_user(regs->xss, (unsigned int __user *)&sc->ss); |
| |
| tmp = save_i387(fpstate); |
| if (tmp < 0) |
| err = 1; |
| else |
| err |= __put_user(tmp ? fpstate : NULL, &sc->fpstate); |
| |
| /* non-iBCS2 extensions.. */ |
| err |= __put_user(mask, &sc->oldmask); |
| err |= __put_user(current->thread.cr2, &sc->cr2); |
| |
| return err; |
| } |
| |
| /* |
| * Determine which stack to use.. |
| */ |
| static inline void __user * |
| get_sigframe(struct k_sigaction *ka, struct pt_regs * regs, size_t frame_size) |
| { |
| unsigned long esp; |
| |
| /* Default to using normal stack */ |
| esp = regs->esp; |
| |
| /* This is the X/Open sanctioned signal stack switching. */ |
| if (ka->sa.sa_flags & SA_ONSTACK) { |
| if (sas_ss_flags(esp) == 0) |
| esp = current->sas_ss_sp + current->sas_ss_size; |
| } |
| |
| /* This is the legacy signal stack switching. */ |
| else if ((regs->xss & 0xffff) != __USER_DS && |
| !(ka->sa.sa_flags & SA_RESTORER) && |
| ka->sa.sa_restorer) { |
| esp = (unsigned long) ka->sa.sa_restorer; |
| } |
| |
| esp -= frame_size; |
| /* Align the stack pointer according to the i386 ABI, |
| * i.e. so that on function entry ((sp + 4) & 15) == 0. */ |
| esp = ((esp + 4) & -16ul) - 4; |
| return (void __user *) esp; |
| } |
| |
| /* These symbols are defined with the addresses in the vsyscall page. |
| See vsyscall-sigreturn.S. */ |
| extern void __user __kernel_sigreturn; |
| extern void __user __kernel_rt_sigreturn; |
| |
| static int setup_frame(int sig, struct k_sigaction *ka, |
| sigset_t *set, struct pt_regs * regs) |
| { |
| void __user *restorer; |
| struct sigframe __user *frame; |
| int err = 0; |
| int usig; |
| |
| frame = get_sigframe(ka, regs, sizeof(*frame)); |
| |
| if (!access_ok(VERIFY_WRITE, frame, sizeof(*frame))) |
| goto give_sigsegv; |
| |
| usig = current_thread_info()->exec_domain |
| && current_thread_info()->exec_domain->signal_invmap |
| && sig < 32 |
| ? current_thread_info()->exec_domain->signal_invmap[sig] |
| : sig; |
| |
| err = __put_user(usig, &frame->sig); |
| if (err) |
| goto give_sigsegv; |
| |
| err = setup_sigcontext(&frame->sc, &frame->fpstate, regs, set->sig[0]); |
| if (err) |
| goto give_sigsegv; |
| |
| if (_NSIG_WORDS > 1) { |
| err = __copy_to_user(&frame->extramask, &set->sig[1], |
| sizeof(frame->extramask)); |
| if (err) |
| goto give_sigsegv; |
| } |
| |
| if (current->binfmt->hasvdso) |
| restorer = (void *)VDSO_SYM(&__kernel_sigreturn); |
| else |
| restorer = (void *)&frame->retcode; |
| if (ka->sa.sa_flags & SA_RESTORER) |
| restorer = ka->sa.sa_restorer; |
| |
| /* Set up to return from userspace. */ |
| err |= __put_user(restorer, &frame->pretcode); |
| |
| /* |
| * This is popl %eax ; movl $,%eax ; int $0x80 |
| * |
| * WE DO NOT USE IT ANY MORE! It's only left here for historical |
| * reasons and because gdb uses it as a signature to notice |
| * signal handler stack frames. |
| */ |
| err |= __put_user(0xb858, (short __user *)(frame->retcode+0)); |
| err |= __put_user(__NR_sigreturn, (int __user *)(frame->retcode+2)); |
| err |= __put_user(0x80cd, (short __user *)(frame->retcode+6)); |
| |
| if (err) |
| goto give_sigsegv; |
| |
| /* Set up registers for signal handler */ |
| regs->esp = (unsigned long) frame; |
| regs->eip = (unsigned long) ka->sa.sa_handler; |
| regs->eax = (unsigned long) sig; |
| regs->edx = (unsigned long) 0; |
| regs->ecx = (unsigned long) 0; |
| |
| regs->xds = __USER_DS; |
| regs->xes = __USER_DS; |
| regs->xss = __USER_DS; |
| regs->xcs = __USER_CS; |
| |
| /* |
| * Clear TF when entering the signal handler, but |
| * notify any tracer that was single-stepping it. |
| * The tracer may want to single-step inside the |
| * handler too. |
| */ |
| regs->eflags &= ~TF_MASK; |
| if (test_thread_flag(TIF_SINGLESTEP)) |
| ptrace_notify(SIGTRAP); |
| |
| #if DEBUG_SIG |
| printk("SIG deliver (%s:%d): sp=%p pc=%p ra=%p\n", |
| current->comm, current->pid, frame, regs->eip, frame->pretcode); |
| #endif |
| |
| return 0; |
| |
| give_sigsegv: |
| force_sigsegv(sig, current); |
| return -EFAULT; |
| } |
| |
| static int setup_rt_frame(int sig, struct k_sigaction *ka, siginfo_t *info, |
| sigset_t *set, struct pt_regs * regs) |
| { |
| void __user *restorer; |
| struct rt_sigframe __user *frame; |
| int err = 0; |
| int usig; |
| |
| frame = get_sigframe(ka, regs, sizeof(*frame)); |
| |
| if (!access_ok(VERIFY_WRITE, frame, sizeof(*frame))) |
| goto give_sigsegv; |
| |
| usig = current_thread_info()->exec_domain |
| && current_thread_info()->exec_domain->signal_invmap |
| && sig < 32 |
| ? current_thread_info()->exec_domain->signal_invmap[sig] |
| : sig; |
| |
| err |= __put_user(usig, &frame->sig); |
| err |= __put_user(&frame->info, &frame->pinfo); |
| err |= __put_user(&frame->uc, &frame->puc); |
| err |= copy_siginfo_to_user(&frame->info, info); |
| if (err) |
| goto give_sigsegv; |
| |
| /* Create the ucontext. */ |
| err |= __put_user(0, &frame->uc.uc_flags); |
| err |= __put_user(0, &frame->uc.uc_link); |
| err |= __put_user(current->sas_ss_sp, &frame->uc.uc_stack.ss_sp); |
| err |= __put_user(sas_ss_flags(regs->esp), |
| &frame->uc.uc_stack.ss_flags); |
| err |= __put_user(current->sas_ss_size, &frame->uc.uc_stack.ss_size); |
| err |= setup_sigcontext(&frame->uc.uc_mcontext, &frame->fpstate, |
| regs, set->sig[0]); |
| err |= __copy_to_user(&frame->uc.uc_sigmask, set, sizeof(*set)); |
| if (err) |
| goto give_sigsegv; |
| |
| /* Set up to return from userspace. */ |
| restorer = (void *)VDSO_SYM(&__kernel_rt_sigreturn); |
| if (ka->sa.sa_flags & SA_RESTORER) |
| restorer = ka->sa.sa_restorer; |
| err |= __put_user(restorer, &frame->pretcode); |
| |
| /* |
| * This is movl $,%eax ; int $0x80 |
| * |
| * WE DO NOT USE IT ANY MORE! It's only left here for historical |
| * reasons and because gdb uses it as a signature to notice |
| * signal handler stack frames. |
| */ |
| err |= __put_user(0xb8, (char __user *)(frame->retcode+0)); |
| err |= __put_user(__NR_rt_sigreturn, (int __user *)(frame->retcode+1)); |
| err |= __put_user(0x80cd, (short __user *)(frame->retcode+5)); |
| |
| if (err) |
| goto give_sigsegv; |
| |
| /* Set up registers for signal handler */ |
| regs->esp = (unsigned long) frame; |
| regs->eip = (unsigned long) ka->sa.sa_handler; |
| regs->eax = (unsigned long) usig; |
| regs->edx = (unsigned long) &frame->info; |
| regs->ecx = (unsigned long) &frame->uc; |
| |
| regs->xds = __USER_DS; |
| regs->xes = __USER_DS; |
| regs->xss = __USER_DS; |
| regs->xcs = __USER_CS; |
| |
| /* |
| * Clear TF when entering the signal handler, but |
| * notify any tracer that was single-stepping it. |
| * The tracer may want to single-step inside the |
| * handler too. |
| */ |
| regs->eflags &= ~TF_MASK; |
| if (test_thread_flag(TIF_SINGLESTEP)) |
| ptrace_notify(SIGTRAP); |
| |
| #if DEBUG_SIG |
| printk("SIG deliver (%s:%d): sp=%p pc=%p ra=%p\n", |
| current->comm, current->pid, frame, regs->eip, frame->pretcode); |
| #endif |
| |
| return 0; |
| |
| give_sigsegv: |
| force_sigsegv(sig, current); |
| return -EFAULT; |
| } |
| |
| /* |
| * OK, we're invoking a handler |
| */ |
| |
| static int |
| handle_signal(unsigned long sig, siginfo_t *info, struct k_sigaction *ka, |
| sigset_t *oldset, struct pt_regs * regs) |
| { |
| int ret; |
| |
| /* Are we from a system call? */ |
| if (regs->orig_eax >= 0) { |
| /* If so, check system call restarting.. */ |
| switch (regs->eax) { |
| case -ERESTART_RESTARTBLOCK: |
| case -ERESTARTNOHAND: |
| regs->eax = -EINTR; |
| break; |
| |
| case -ERESTARTSYS: |
| if (!(ka->sa.sa_flags & SA_RESTART)) { |
| regs->eax = -EINTR; |
| break; |
| } |
| /* fallthrough */ |
| case -ERESTARTNOINTR: |
| regs->eax = regs->orig_eax; |
| regs->eip -= 2; |
| } |
| } |
| |
| /* |
| * If TF is set due to a debugger (PT_DTRACE), clear the TF flag so |
| * that register information in the sigcontext is correct. |
| */ |
| if (unlikely(regs->eflags & TF_MASK) |
| && likely(current->ptrace & PT_DTRACE)) { |
| current->ptrace &= ~PT_DTRACE; |
| regs->eflags &= ~TF_MASK; |
| } |
| |
| /* Set up the stack frame */ |
| if (ka->sa.sa_flags & SA_SIGINFO) |
| ret = setup_rt_frame(sig, ka, info, oldset, regs); |
| else |
| ret = setup_frame(sig, ka, oldset, regs); |
| |
| if (ret == 0) { |
| spin_lock_irq(¤t->sighand->siglock); |
| sigorsets(¤t->blocked,¤t->blocked,&ka->sa.sa_mask); |
| if (!(ka->sa.sa_flags & SA_NODEFER)) |
| sigaddset(¤t->blocked,sig); |
| recalc_sigpending(); |
| spin_unlock_irq(¤t->sighand->siglock); |
| } |
| |
| return ret; |
| } |
| |
| /* |
| * Note that 'init' is a special process: it doesn't get signals it doesn't |
| * want to handle. Thus you cannot kill init even with a SIGKILL even by |
| * mistake. |
| */ |
| static void fastcall do_signal(struct pt_regs *regs) |
| { |
| siginfo_t info; |
| int signr; |
| struct k_sigaction ka; |
| sigset_t *oldset; |
| |
| /* |
| * We want the common case to go fast, which |
| * is why we may in certain cases get here from |
| * kernel mode. Just return without doing anything |
| * if so. vm86 regs switched out by assembly code |
| * before reaching here, so testing against kernel |
| * CS suffices. |
| */ |
| if (!user_mode(regs)) |
| return; |
| |
| if (test_thread_flag(TIF_RESTORE_SIGMASK)) |
| oldset = ¤t->saved_sigmask; |
| else |
| oldset = ¤t->blocked; |
| |
| signr = get_signal_to_deliver(&info, &ka, regs, NULL); |
| if (signr > 0) { |
| /* Reenable any watchpoints before delivering the |
| * signal to user space. The processor register will |
| * have been cleared if the watchpoint triggered |
| * inside the kernel. |
| */ |
| if (unlikely(current->thread.debugreg[7])) |
| set_debugreg(current->thread.debugreg[7], 7); |
| |
| /* Whee! Actually deliver the signal. */ |
| if (handle_signal(signr, &info, &ka, oldset, regs) == 0) { |
| /* a signal was successfully delivered; the saved |
| * sigmask will have been stored in the signal frame, |
| * and will be restored by sigreturn, so we can simply |
| * clear the TIF_RESTORE_SIGMASK flag */ |
| if (test_thread_flag(TIF_RESTORE_SIGMASK)) |
| clear_thread_flag(TIF_RESTORE_SIGMASK); |
| } |
| |
| return; |
| } |
| |
| /* Did we come from a system call? */ |
| if (regs->orig_eax >= 0) { |
| /* Restart the system call - no handlers present */ |
| switch (regs->eax) { |
| case -ERESTARTNOHAND: |
| case -ERESTARTSYS: |
| case -ERESTARTNOINTR: |
| regs->eax = regs->orig_eax; |
| regs->eip -= 2; |
| break; |
| |
| case -ERESTART_RESTARTBLOCK: |
| regs->eax = __NR_restart_syscall; |
| regs->eip -= 2; |
| break; |
| } |
| } |
| |
| /* if there's no signal to deliver, we just put the saved sigmask |
| * back */ |
| if (test_thread_flag(TIF_RESTORE_SIGMASK)) { |
| clear_thread_flag(TIF_RESTORE_SIGMASK); |
| sigprocmask(SIG_SETMASK, ¤t->saved_sigmask, NULL); |
| } |
| } |
| |
| /* |
| * notification of userspace execution resumption |
| * - triggered by the TIF_WORK_MASK flags |
| */ |
| __attribute__((regparm(3))) |
| void do_notify_resume(struct pt_regs *regs, void *_unused, |
| __u32 thread_info_flags) |
| { |
| /* Pending single-step? */ |
| if (thread_info_flags & _TIF_SINGLESTEP) { |
| regs->eflags |= TF_MASK; |
| clear_thread_flag(TIF_SINGLESTEP); |
| } |
| |
| /* deal with pending signal delivery */ |
| if (thread_info_flags & (_TIF_SIGPENDING | _TIF_RESTORE_SIGMASK)) |
| do_signal(regs); |
| |
| clear_thread_flag(TIF_IRET); |
| } |