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authorUlrich Drepper <drepper@redhat.com>1998-02-17 15:26:57 +0000
committerUlrich Drepper <drepper@redhat.com>1998-02-17 15:26:57 +0000
commit09e8bdd3cddb18bbe36dcf7031cac4e931a1c91c (patch)
treefcf4ea7d92e643dc22edcb04a51e81ebd27e7802 /sysdeps
parentd7d1f4baddee50c8629458a84a0d0a28865708f8 (diff)
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(rt_sigreturn): Make compatible with older kernels.
Diffstat (limited to 'sysdeps')
-rw-r--r--sysdeps/unix/sysv/linux/alpha/rt_sigaction.S27
1 files changed, 17 insertions, 10 deletions
diff --git a/sysdeps/unix/sysv/linux/alpha/rt_sigaction.S b/sysdeps/unix/sysv/linux/alpha/rt_sigaction.S
index 1d98de9695..3959e5d7df 100644
--- a/sysdeps/unix/sysv/linux/alpha/rt_sigaction.S
+++ b/sysdeps/unix/sysv/linux/alpha/rt_sigaction.S
@@ -1,4 +1,4 @@
-/* Copyright (C) 1998 Free Software Foundation, Inc.
+/* Copyright (C) 1998 Free Software Foundation, Inc.
This file is part of the GNU C Library.
Contributed by Richard Henderson <rth@cygnus.com>, 1998
@@ -16,17 +16,17 @@
License along with the GNU C Library; see the file COPYING.LIB. If not,
write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
Boston, MA 02111-1307, USA. */
-
+
#include <sysdep.h>
-
+
/* On Alpha we desparately want to avoid having to issue an imb. Ordinarily
the kernel would have to issue one after setting up the signal return
stack, but the Linux rt_sigaction syscall is prepared to accept a pointer
- to the sigreturn syscall, instead of inlining it on the stack.
-
+ to the sigreturn syscall, instead of inlining it on the stack.
+
This just about halves signal delivery time. */
-
-
+
+#ifdef __NR_rt_sigaction
.text
ENTRY(__syscall_rt_sigaction)
.frame sp,0,ra,0
@@ -38,7 +38,7 @@ ENTRY(__syscall_rt_sigaction)
.set at
#endif
.prologue 1
-
+
beq a1, 0f
ldl t0, 8(a1) # sa_flags
lda a4, sigreturn-__syscall_rt_sigaction(pv)
@@ -46,10 +46,10 @@ ENTRY(__syscall_rt_sigaction)
and t0, 0x00000040, t0 # SA_SIGINFO
cmovne t0, t1, a4
0: ldi v0,__NR_rt_sigaction
- callsys
+ callsys
bne a3,1f
ret
-
+
1:
#ifndef PROF
br gp,2f
@@ -76,3 +76,10 @@ rt_sigreturn:
ldi v0,__NR_rt_sigreturn
callsys
.end rt_sigreturn
+#else
+ENTRY(__syscall_rt_sigaction)
+ ldgp $29,0($27)
+ ldi $0,ENOSYS
+ jmp __syscall_error
+END(__syscall_rt_sigaction)
+#endif