2 * Common signal handling code for both 32 and 64 bits
4 * Copyright (c) 2007 Benjamin Herrenschmidt, IBM Coproration
5 * Extracted from signal_32.c and signal_64.c
7 * This file is subject to the terms and conditions of the GNU General
8 * Public License. See the file README.legal in the main directory of
9 * this archive for more details.
12 #include <linux/ptrace.h>
13 #include <linux/signal.h>
14 #include <asm/unistd.h>
20 * Restore the user process's signal mask
22 void restore_sigmask(sigset_t *set)
24 sigdelsetmask(set, ~_BLOCKABLE);
25 spin_lock_irq(¤t->sighand->siglock);
26 current->blocked = *set;
28 spin_unlock_irq(¤t->sighand->siglock);
31 void check_syscall_restart(struct pt_regs *regs, struct k_sigaction *ka,
34 unsigned long ret = regs->gpr[3];
38 if (TRAP(regs) != 0x0C00)
41 /* error signalled ? */
42 if (!(regs->ccr & 0x10000000))
46 case ERESTART_RESTARTBLOCK:
48 /* ERESTARTNOHAND means that the syscall should only be
49 * restarted if there was no handler for the signal, and since
50 * we only get here if there is a handler, we dont restart.
52 restart = !has_handler;
55 /* ERESTARTSYS means to restart the syscall if there is no
56 * handler or the handler was registered with SA_RESTART
58 restart = !has_handler || (ka->sa.sa_flags & SA_RESTART) != 0;
61 /* ERESTARTNOINTR means that the syscall should be
62 * called again after the signal handler returns.
69 if (ret == ERESTART_RESTARTBLOCK)
70 regs->gpr[0] = __NR_restart_syscall;
72 regs->gpr[3] = regs->orig_gpr3;
76 regs->result = -EINTR;
78 regs->ccr |= 0x10000000;
82 long sys_sigaltstack(const stack_t __user *uss, stack_t __user *uoss,
83 unsigned long r5, unsigned long r6, unsigned long r7,
84 unsigned long r8, struct pt_regs *regs)
86 return do_sigaltstack(uss, uoss, regs->gpr[1]);