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* sysdeps/unix/sysv/linux/i386/sigaction.c: Correct restorer
	function handling.
This commit is contained in:
Ulrich Drepper 1999-06-06 22:12:29 +00:00
parent 25ee8743cf
commit e0082312bc
2 changed files with 37 additions and 40 deletions
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3
ChangeLog
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@ -1,5 +1,8 @@
1999-06-06 Ulrich Drepper <drepper@cygnus.com>
* sysdeps/unix/sysv/linux/i386/sigaction.c: Correct restorer
function handling.
* sysdeps/unix/sysv/linux/i386/sigaction.c (SA_RESTORER): New #define.
1999-06-06 Andi Kleen <ak@muc.de>

74
sysdeps/unix/sysv/linux/i386/sigaction.c
View File

@ -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)