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>
16 void check_syscall_restart(struct pt_regs *regs, struct k_sigaction *ka,
19 unsigned long ret = regs->gpr[3];
23 if (TRAP(regs) != 0x0C00)
26 /* error signalled ? */
27 if (!(regs->ccr & 0x10000000))
31 case ERESTART_RESTARTBLOCK:
33 /* ERESTARTNOHAND means that the syscall should only be
34 * restarted if there was no handler for the signal, and since
35 * we only get here if there is a handler, we dont restart.
37 restart = !has_handler;
40 /* ERESTARTSYS means to restart the syscall if there is no
41 * handler or the handler was registered with SA_RESTART
43 restart = !has_handler || (ka->sa.sa_flags & SA_RESTART) != 0;
46 /* ERESTARTNOINTR means that the syscall should be
47 * called again after the signal handler returns.
54 if (ret == ERESTART_RESTARTBLOCK)
55 regs->gpr[0] = __NR_restart_syscall;
57 regs->gpr[3] = regs->orig_gpr3;
61 regs->result = -EINTR;
63 regs->ccr |= 0x10000000;
67 long sys_sigaltstack(const stack_t __user *uss, stack_t __user *uoss,
68 unsigned long r5, unsigned long r6, unsigned long r7,
69 unsigned long r8, struct pt_regs *regs)
71 return do_sigaltstack(uss, uoss, regs->gpr[1]);