diff options
Diffstat (limited to 'libc/sysdeps/linux/arc/sigaction.c')
| -rw-r--r-- | libc/sysdeps/linux/arc/sigaction.c | 14 |
1 files changed, 7 insertions, 7 deletions
diff --git a/libc/sysdeps/linux/arc/sigaction.c b/libc/sysdeps/linux/arc/sigaction.c index a34c7cf4c..96c9983b1 100644 --- a/libc/sysdeps/linux/arc/sigaction.c +++ b/libc/sysdeps/linux/arc/sigaction.c @@ -10,8 +10,13 @@ #include <sys/syscall.h> #include <bits/kernel_sigaction.h> -extern void __default_rt_sa_restorer(void); -//libc_hidden_proto(__default_rt_sa_restorer); +/* + * Default sigretrun stub if user doesn't specify SA_RESTORER + */ +static void __default_rt_sa_restorer(void) +{ + INTERNAL_SYSCALL_NCS(__NR_rt_sigreturn, , 0); +} #define SA_RESTORER 0x04000000 @@ -25,11 +30,6 @@ __libc_sigaction (int sig, const struct sigaction *act, struct sigaction *oact) /* * SA_RESTORER is only relevant for act != NULL case * (!act means caller only wants to know @oact) - * - * For the normal/default cases (user not providing SA_RESTORER) use - * a real sigreturn stub to avoid kernel synthesizing one on user stack - * at runtime, which needs PTE permissions update (hence TLB entry - * update) and costly cache line flushes for code modification */ if (act && !(act->sa_flags & SA_RESTORER)) { kact.sa_restorer = __default_rt_sa_restorer; |