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. */
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
}
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;
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