diff options
Diffstat (limited to 'sysdeps')
| -rw-r--r-- | sysdeps/unix/sysv/linux/i386/sigaction.c | 74 |
1 files changed, 34 insertions, 40 deletions
diff --git a/sysdeps/unix/sysv/linux/i386/sigaction.c b/sysdeps/unix/sysv/linux/i386/sigaction.c index 400e54c353..fddb22a4e0 100644 --- a/sysdeps/unix/sysv/linux/i386/sigaction.c +++ b/sysdeps/unix/sysv/linux/i386/sigaction.c @@ -45,6 +45,9 @@ extern int __syscall_rt_sigaction (int, const struct kernel_sigaction *, int __libc_missing_rt_sigs; #endif +static void restore_rt (void) asm ("__restore_rt"); +static void restore (void) asm ("__restore"); + /* If ACT is not NULL, change the action for SIG to *ACT. If OACT is not NULL, put the old action for SIG in *OACT. */ @@ -72,10 +75,10 @@ __sigaction (int sig, const struct sigaction *act, struct sigaction *oact) { kact.k_sa_handler = act->sa_handler; memcpy (&kact.sa_mask, &act->sa_mask, sizeof (sigset_t)); - kact.sa_flags = act->sa_flags | SA_RESTORER; + kact.sa_flags = act->sa_flags; - kact.sa_restorer = ((act->sa_flags & SA_NOMASK) - ? &&restore_nomask : &&restore); + kact.sa_restorer = ((act->sa_flags & SA_SIGINFO) + ? &restore_rt : &restore); } /* XXX The size argument hopefully will have to be changed to the @@ -111,8 +114,7 @@ __sigaction (int sig, const struct sigaction *act, struct sigaction *oact) k_newact.sa_mask = act->sa_mask.__val[0]; k_newact.sa_flags = act->sa_flags | SA_RESTORER; - k_newact.sa_restorer = ((act->sa_flags & SA_NOMASK) - ? &&restore_nomask : &&restore); + k_newact.sa_restorer = &restore; } asm volatile ("pushl %%ebx\n" @@ -139,41 +141,33 @@ __sigaction (int sig, const struct sigaction *act, struct sigaction *oact) return 0; #endif - - restore: - asm ( -#ifdef PIC - " pushl %%ebx\n" - " call 0f\n" - "0: popl %%ebx\n" - " addl $_GLOBAL_OFFSET_TABLE_+[.-0b], %%ebx\n" - " addl $8, %%esp\n" - " call __sigsetmask@PLT\n" - " addl $8, %%esp\n" - " popl %%ebx\n" -#else - " addl $4, %%esp\n" - " call __sigsetmask\n" - " addl $4, %%esp\n" -#endif - " popl %%eax\n" - " popl %%ecx\n" - " popl %%edx\n" - " popf\n" - " ret" - : : ); - - restore_nomask: - asm (" addl $4, %%esp\n" - " popl %%eax\n" - " popl %%ecx\n" - " popl %%edx\n" - " popf\n" - " ret" - : : ); - - /* NOTREACHED */ - return -1; } weak_alias (__sigaction, sigaction) + +#define RESTORE(name, syscall) RESTORE2 (name, syscall) +#define RESTORE2(name, syscall) \ +asm \ + ( \ + ".align 16\n" \ + "__" #name ":\n" \ + " movl $" #syscall ", %eax\n" \ + " int $0x80" \ + ); + +/* The return code for realtime-signals. */ +RESTORE (restore_rt, __NR_rt_sigreturn) + +/* For the boring old signals. */ +# undef RESTORE2 +# define RESTORE2(name, syscall) \ +asm \ + ( \ + ".align 8\n" \ + "__" #name ":\n" \ + " popl %eax\n" \ + " movl $" #syscall ", %eax\n" \ + " int $0x80" \ + ); + +RESTORE (restore, __NR_sigreturn) |