SH: ABORT_INSTRUCTION.

git-mirror · Jun 23, 2012 · 967705f · 967705f
1 parent a9def8c
commit 967705f
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Showing 3 changed files with 11 additions and 3 deletions.
diff --git a/ChangeLog b/ChangeLog
@@ -1,5 +1,9 @@
 2012-06-23  Thomas Schwinge  <thomas@codesourcery.com>
 
+	* sysdeps/sh/abort-instr.h: New file.
+	* sysdeps/unix/sysv/linux/sh/makecontext.S (.Lexitcode): Terminate the
+	process in case exit returns.
+
 	* sysdeps/unix/sysv/linux/sh/makecontext.S (.Lexitcode): Always
 	initialize the GOT register before use.
 

diff --git a/sysdeps/sh/abort-instr.h b/sysdeps/sh/abort-instr.h
@@ -0,0 +1,3 @@
+/* An instruction which should crash any program is `sleep'.  */
+#define ABORT_INSTRUCTION_ASM sleep
+#define ABORT_INSTRUCTION asm ("sleep")
diff --git a/sysdeps/unix/sysv/linux/sh/makecontext.S b/sysdeps/unix/sysv/linux/sh/makecontext.S
@@ -17,6 +17,7 @@
    <http://www.gnu.org/licenses/>.  */
 
 #include <sysdep.h>
+#include <abort-instr.h>
 
 #include "ucontext_i.h"
 
@@ -124,9 +125,9 @@ ENTRY(__makecontext)
 #endif
 	jsr	@r1
 	 mov	r0, r4
-0:
-	bra	0b
-	 nop
+	/* The 'exit' call should never return.  In case it does cause the
+	   process to terminate.  */
+	ABORT_INSTRUCTION_ASM
 
 	.align	2
 #ifdef PIC