forked from Minki/linux
db277e9a67
restore_sigmask is exactly the same on 32 and 64bit, so move it to common code. Also move _BLOCKABLE to signal.h to avoid defining it multiple times. Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> Signed-off-by: Paul Mackerras <paulus@samba.org>
88 lines
2.1 KiB
C
88 lines
2.1 KiB
C
/*
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* Common signal handling code for both 32 and 64 bits
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*
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* Copyright (c) 2007 Benjamin Herrenschmidt, IBM Coproration
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* Extracted from signal_32.c and signal_64.c
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*
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* This file is subject to the terms and conditions of the GNU General
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* Public License. See the file README.legal in the main directory of
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* this archive for more details.
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*/
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#include <linux/ptrace.h>
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#include <linux/signal.h>
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#include <asm/unistd.h>
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#include "signal.h"
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/*
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* Restore the user process's signal mask
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*/
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void restore_sigmask(sigset_t *set)
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{
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sigdelsetmask(set, ~_BLOCKABLE);
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spin_lock_irq(¤t->sighand->siglock);
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current->blocked = *set;
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recalc_sigpending();
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spin_unlock_irq(¤t->sighand->siglock);
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}
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void check_syscall_restart(struct pt_regs *regs, struct k_sigaction *ka,
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int has_handler)
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{
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unsigned long ret = regs->gpr[3];
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int restart = 1;
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/* syscall ? */
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if (TRAP(regs) != 0x0C00)
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return;
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/* error signalled ? */
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if (!(regs->ccr & 0x10000000))
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return;
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switch (ret) {
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case ERESTART_RESTARTBLOCK:
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case ERESTARTNOHAND:
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/* ERESTARTNOHAND means that the syscall should only be
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* restarted if there was no handler for the signal, and since
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* we only get here if there is a handler, we dont restart.
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*/
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restart = !has_handler;
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break;
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case ERESTARTSYS:
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/* ERESTARTSYS means to restart the syscall if there is no
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* handler or the handler was registered with SA_RESTART
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*/
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restart = !has_handler || (ka->sa.sa_flags & SA_RESTART) != 0;
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break;
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case ERESTARTNOINTR:
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/* ERESTARTNOINTR means that the syscall should be
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* called again after the signal handler returns.
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*/
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break;
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default:
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return;
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}
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if (restart) {
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if (ret == ERESTART_RESTARTBLOCK)
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regs->gpr[0] = __NR_restart_syscall;
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else
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regs->gpr[3] = regs->orig_gpr3;
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regs->nip -= 4;
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regs->result = 0;
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} else {
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regs->result = -EINTR;
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regs->gpr[3] = EINTR;
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regs->ccr |= 0x10000000;
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}
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}
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long sys_sigaltstack(const stack_t __user *uss, stack_t __user *uoss,
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unsigned long r5, unsigned long r6, unsigned long r7,
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unsigned long r8, struct pt_regs *regs)
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{
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return do_sigaltstack(uss, uoss, regs->gpr[1]);
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}
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