Make amd64 signal returns work.

git-svn-id: svn://svn.valgrind.org/valgrind/trunk@3233

diff --git a/coregrind/amd64-linux/syscall.S b/coregrind/amd64-linux/syscall.S
index 79de91955fb369e3055f67ad2edd03de059a74e6..bcbff727cc817085e9ae5c54a9d7c81029859bf5 100644 (file)
--- a/coregrind/amd64-linux/syscall.S
+++ b/coregrind/amd64-linux/syscall.S
@@ -116,12 +116,10 @@ VG_(clone):
         ret
 
 
-
-# XXX: must reinstate comments also -- see x86-linux/syscall.S
-
 .globl VG_(sigreturn)
 VG_(sigreturn):
-       ud2
+        movq    $__NR_rt_sigreturn, %rax
+        syscall
 
 /* Let the linker know we don't need an executable stack */
 .section .note.GNU-stack,"",@progbits