[IA64] make unwinder stop at last frame of the bootloader

Add a dummy nop at the end of _start() to maintain the invariant that the return-pointer (rp) always point to the calling function. This makes unwinding stop at the last frame, as it should. Signed-off-by: David Mosberger-Tang <dmosberger@gmail.com> Signed-off-by: Tony Luck <tony.luck@intel.com>
git-mirror · Aug 13, 2007 · 5d36aa9 · 5d36aa9
1 parent a128747
commit 5d36aa9
Showing 1 changed file with 1 addition and 0 deletions.
diff --git a/arch/ia64/hp/sim/boot/boot_head.S b/arch/ia64/hp/sim/boot/boot_head.S
@@ -26,6 +26,7 @@ GLOBAL_ENTRY(_start)
 	movl sp = stack_mem+16384-16
 	bsw.1
 	br.call.sptk.many rp=start_bootloader
+0:	nop 0		  /* dummy nop to make unwinding work */
 END(_start)
 
 /*