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changes to kernel sigaction struct handling in preparation for mips port

This commit is contained in:
Rich Felker 2012-07-11 02:44:14 -04:00
parent e864a29090
commit fcaec912ed
3 changed files with 18 additions and 15 deletions
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2
Makefile
View File

@ -28,7 +28,7 @@ CFLAGS = -Os -pipe
CFLAGS_C99FSE = -std=c99 -ffreestanding -nostdinc
CFLAGS_ALL = $(CFLAGS_C99FSE)
CFLAGS_ALL += -D_XOPEN_SOURCE=700 -I./src/internal -I./include -I./arch/$(ARCH)
CFLAGS_ALL += -D_XOPEN_SOURCE=700 -I./arch/$(ARCH) -I./src/internal -I./include
CFLAGS_ALL += $(CPPFLAGS) $(CFLAGS)
CFLAGS_ALL_STATIC = $(CFLAGS_ALL)
CFLAGS_ALL_SHARED = $(CFLAGS_ALL) -fPIC -DSHARED -O3

10
src/signal/restore.c
View File

@ -0,0 +1,10 @@
/* These functions will not work, but suffice for targets where the
* kernel sigaction structure does not actually use sa_restorer. */
void __restore()
{
}
void __restore_rt()
{
}

21
src/signal/sigaction.c
View File

@ -4,6 +4,7 @@
#include "syscall.h"
#include "pthread_impl.h"
#include "libc.h"
#include "ksigaction.h"
void __restore(), __restore_rt();
@ -12,28 +13,20 @@ weak_alias(dummy, __pthread_self_def);
int __libc_sigaction(int sig, const struct sigaction *sa, struct sigaction *old)
{
struct {
void *handler;
unsigned long flags;
void (*restorer)(void);
sigset_t mask;
} ksa, kold;
long pksa=0, pkold=0;
struct k_sigaction ksa, *pksa=0;
if (sa) {
ksa.handler = sa->sa_handler;
ksa.flags = sa->sa_flags | SA_RESTORER;
ksa.restorer = (sa->sa_flags & SA_SIGINFO) ? __restore_rt : __restore;
ksa.mask = sa->sa_mask;
pksa = (long)&ksa;
memcpy(&ksa.mask, &sa->sa_mask, sizeof ksa.mask);
}
if (old) pkold = (long)&kold;
__pthread_self_def();
if (syscall(SYS_rt_sigaction, sig, pksa, pkold, 8))
if (syscall(SYS_rt_sigaction, sig, sa?&ksa:0, old?&ksa:0, sizeof ksa.mask))
return -1;
if (old) {
old->sa_handler = kold.handler;
old->sa_flags = kold.flags;
old->sa_mask = kold.mask;
old->sa_handler = ksa.handler;
old->sa_flags = ksa.flags;
memcpy(&old->sa_mask, &ksa.mask, sizeof ksa.mask);
}
return 0;
}