diff options
Diffstat (limited to 'sysdeps/unix/sysv/linux/mips/sigaction.c')
| -rw-r--r-- | sysdeps/unix/sysv/linux/mips/sigaction.c | 45 |
1 files changed, 45 insertions, 0 deletions
diff --git a/sysdeps/unix/sysv/linux/mips/sigaction.c b/sysdeps/unix/sysv/linux/mips/sigaction.c index 0dee8ccc7e..2a99bac8fe 100644 --- a/sysdeps/unix/sysv/linux/mips/sigaction.c +++ b/sysdeps/unix/sysv/linux/mips/sigaction.c @@ -41,6 +41,15 @@ extern int __syscall_sigaction (int, const struct old_kernel_sigaction *__unboun extern int __syscall_rt_sigaction (int, const struct kernel_sigaction *__unbounded, struct kernel_sigaction *__unbounded, size_t); +#if _MIPS_SIM != _MIPS_SIM_ABI32 + +# ifdef __NR_rt_sigreturn +static void restore_rt (void) asm ("__restore_rt"); +# endif +# ifdef __NR_sigreturn +static void restore (void) asm ("__restore"); +# endif +#endif /* 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. */ @@ -74,7 +83,11 @@ __libc_sigaction (sig, act, oact) memcpy (&kact.sa_mask, &act->sa_mask, sizeof (kernel_sigset_t)); kact.sa_flags = act->sa_flags; # ifdef HAVE_SA_RESTORER +# if _MIPS_SIM == _MIPS_SIM_ABI32 kact.sa_restorer = act->sa_restorer; +# else + kact.sa_restorer = &restore_rt; +# endif # endif } @@ -128,7 +141,11 @@ __libc_sigaction (sig, act, oact) oact->sa_mask.__val[0] = k_osigact.sa_mask; oact->sa_flags = k_osigact.sa_flags; # ifdef HAVE_SA_RESTORER +# if _MIPS_SIM == _MIPS_SIM_ABI32 oact->sa_restorer = k_osigact.sa_restorer; +# else + oact->sa_restorer = &restore; +# endif # endif } return result; @@ -141,3 +158,31 @@ weak_alias (__libc_sigaction, __sigaction) libc_hidden_weak (__sigaction) weak_alias (__libc_sigaction, sigaction) #endif + +/* NOTE: Please think twice before making any changes to the bits of + code below. GDB needs some intimate knowledge about it to + recognize them as signal trampolines, and make backtraces through + signal handlers work right. Important are both the names + (__restore_rt) and the exact instruction sequence. + If you ever feel the need to make any changes, please notify the + appropriate GDB maintainer. */ + +#define RESTORE(name, syscall) RESTORE2 (name, syscall) +#define RESTORE2(name, syscall) \ +asm \ + ( \ + ".align 4\n" \ + "__" #name ":\n" \ + " li $2, " #syscall "\n" \ + " syscall\n" \ + ); + +/* The return code for realtime-signals. */ +#if _MIPS_SIM != _MIPS_SIM_ABI32 +# ifdef __NR_rt_sigreturn +RESTORE (restore_rt, __NR_rt_sigreturn) +# endif +# ifdef __NR_sigreturn +RESTORE (restore, __NR_sigreturn) +# endif +#endif |