x86_64: makecontext: exit (0) if uc_link is the null pointer.

git-mirror · Jul 17, 2012 · f7db317 · f7db317
1 parent dc97c22
commit f7db317
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Showing 2 changed files with 8 additions and 2 deletions.
diff --git a/ChangeLog b/ChangeLog
@@ -1,3 +1,8 @@
+2012-07-17  Thomas Schwinge  <thomas@codesourcery.com>
+
+	* sysdeps/unix/sysv/linux/x86_64/__start_context.S
+	(__start_context): Preserve zero value for regular exit case.
+
 2012-07-17  Thomas Schwinge  <thomas@codesourcery.com>
 	    Andreas Krebbel  <Andreas.Krebbel@de.ibm.com>
 

diff --git a/sysdeps/unix/sysv/linux/x86_64/__start_context.S b/sysdeps/unix/sysv/linux/x86_64/__start_context.S
@@ -1,4 +1,4 @@
-/* Copyright (C) 2002, 2003, 2004 Free Software Foundation, Inc.
+/* Copyright (C) 2002-2012 Free Software Foundation, Inc.
    This file is part of the GNU C Library.
    Contributed by Andreas Jaeger <aj@suse.de>, 2002.
 
@@ -39,8 +39,9 @@ ENTRY(__start_context)
 	call	JUMPTARGET(__setcontext)
 	/* If this returns (which can happen if the syscall fails) we'll
 	   exit the program with the return error value (-1).  */
+	movq	%rax,%rdi
 
-2:	movq	%rax,%rdi
+2:
 	call	HIDDEN_JUMPTARGET(exit)
 	/* The 'exit' call should never return.  In case it does cause
 	   the process to terminate.  */