1 files changed, 78 insertions, 14 deletions

diff --git a/sysdeps/unix/sysv/linux/sparc/sparc32/sigaction.c b/sysdeps/unix/sysv/linux/sparc/sparc32/sigaction.c
index 742ac5583c..ae44328fad 100644
--- a/sysdeps/unix/sysv/linux/sparc/sparc32/sigaction.c
+++ b/sysdeps/unix/sysv/linux/sparc/sparc32/sigaction.c
@@ -23,6 +23,13 @@
 #include <errno.h>
 #include <kernel_sigaction.h>
 
+extern int __syscall_rt_sigaction (int, const struct kernel_sigaction *,
+				   struct kernel_sigaction *, unsigned long,
+				   size_t);
+
+static void __rt_sigreturn_stub (void);
+static void __sigreturn_stub (void);
+
 /* The variable is shared between all wrappers around signal handling
    functions which have RT equivalents.  */
 int __libc_missing_rt_sigs;
@@ -30,8 +37,49 @@ int __libc_missing_rt_sigs;
 int
 __sigaction (int sig, __const struct sigaction *act, struct sigaction *oact)
 {
+  struct old_kernel_sigaction k_sigact, k_osigact;
   int ret;
-  struct kernel_sigaction k_sigact, k_osigact;
+
+  /* First try the RT signals.  */
+  if (!__libc_missing_rt_sigs)
+    {
+      struct kernel_sigaction kact, koact;
+      unsigned long stub = 0;
+      int saved_errno = errno;
+
+      if (act)
+	{
+	  kact.k_sa_handler = act->sa_handler;
+	  memcpy (&kact.sa_mask, &act->sa_mask, sizeof (sigset_t));
+	  if (((kact.sa_flags = act->sa_flags) & SA_SIGINFO) != 0)
+	    stub = (unsigned long) &__rt_sigreturn_stub;
+	  else
+	    stub = (unsigned long) &__sigreturn_stub;
+	  stub -= 8;
+	  kact.sa_restorer = NULL;
+	}
+
+      /* XXX The size argument hopefully will have to be changed to the
+	 real size of the user-level sigset_t.  */
+      ret = __syscall_rt_sigaction (sig, act ? &kact : 0,
+				    oact ? &koact : 0,
+				    stub, _NSIG / 8);
+
+      if (ret >= 0 || errno != ENOSYS)
+	{
+	  if (oact && ret >= 0)
+	    {
+	      oact->sa_handler = koact.k_sa_handler;
+	      memcpy (&oact->sa_mask, &koact.sa_mask, sizeof (sigset_t));
+	      oact->sa_flags = koact.sa_flags;
+	      oact->sa_restorer = koact.sa_restorer;
+	    }
+	  return ret;
+	}
+
+      __set_errno (saved_errno);
+      __libc_missing_rt_sigs = 1;
+    }
 
   /* Magic to tell the kernel we are using "new-style" signals, in that
      the signal table is not kept in userspace.  Not the same as the
@@ -41,15 +89,16 @@ __sigaction (int sig, __const struct sigaction *act, struct sigaction *oact)
   if (act)
     {
       k_sigact.k_sa_handler = act->sa_handler;
-      memcpy (&k_sigact.sa_mask, &act->sa_mask, sizeof (sigset_t));
+      k_sigact.sa_mask = act->sa_mask.__val[0];
       k_sigact.sa_flags = act->sa_flags;
+      k_sigact.sa_restorer = NULL;
     }
 
   {
     register int r_syscallnr __asm__("%g1") = __NR_sigaction;
     register int r_sig __asm__("%o0") = sig;
-    register struct kernel_sigaction *r_act __asm__("%o1");
-    register struct kernel_sigaction *r_oact __asm__("%o2");
+    register struct old_kernel_sigaction *r_act __asm__("%o1");
+    register struct old_kernel_sigaction *r_oact __asm__("%o2");
 
     r_act = act ? &k_sigact : NULL;
     r_oact = oact ? &k_osigact : NULL;
@@ -57,7 +106,7 @@ __sigaction (int sig, __const struct sigaction *act, struct sigaction *oact)
     __asm__ __volatile__("t 0x10\n\t"
 			 "bcc 1f\n\t"
 			 " nop\n\t"
-			 " sub %%g0,%%o0,%%o0\n"
+			 "sub %%g0,%%o0,%%o0\n"
 			 "1:"
 			 : "=r"(r_sig)
 			 : "r"(r_syscallnr), "r"(r_act), "r"(r_oact),
@@ -66,16 +115,13 @@ __sigaction (int sig, __const struct sigaction *act, struct sigaction *oact)
     ret = r_sig;
   }
 
-  if (ret >= 0)
+  if (oact && ret >= 0)
     {
-      if (oact)
-	{
-	  oact->sa_handler = k_osigact.k_sa_handler;
-	  memcpy (&oact->sa_mask, &k_osigact.sa_mask, sizeof (sigset_t));
-	  oact->sa_flags = k_osigact.sa_flags;
-	  oact->sa_restorer = NULL;
-	}
-      return 0;
+      oact->sa_handler = k_osigact.k_sa_handler;
+      oact->sa_mask.__val[0] = k_osigact.sa_mask;
+      oact->sa_flags = k_osigact.sa_flags;
+      oact->sa_restorer = NULL;
+      return ret;
     }
 
   __set_errno (-ret);
@@ -83,3 +129,21 @@ __sigaction (int sig, __const struct sigaction *act, struct sigaction *oact)
 }
 
 weak_alias (__sigaction, sigaction);
+
+static void
+__rt_sigreturn_stub (void)
+{
+  __asm__ ("mov %0, %%g1\n\t"
+	   "ta	0x10\n\t"
+	   : /* no outputs */
+	   : "i" (__NR_rt_sigreturn));
+}
+
+static void
+__sigreturn_stub (void)
+{
+  __asm__ ("mov %0, %%g1\n\t"
+	   "ta	0x10\n\t"
+	   : /* no outputs */
+	   : "i" (__NR_sigreturn));
+}