From f26dfb440a0d48a874435768ee94475ddbe496a2 Mon Sep 17 00:00:00 2001
From: kib <kib@FreeBSD.org>
Date: Fri, 18 Jun 2010 11:10:39 +0000
Subject: Add unwind annotations to the asm part of crt1 on i386. Terminate the
 process with SIGTRAP if _start1() unexpectedly returns.

Reviewed by:	kan
MFC after:	2 weeks
---
 lib/csu/i386-elf/crt1_s.S | 9 ++++++++-
 1 file changed, 8 insertions(+), 1 deletion(-)

(limited to 'lib/csu')

diff --git a/lib/csu/i386-elf/crt1_s.S b/lib/csu/i386-elf/crt1_s.S
index 2af8a1b..949d164 100644
--- a/lib/csu/i386-elf/crt1_s.S
+++ b/lib/csu/i386-elf/crt1_s.S
@@ -30,15 +30,22 @@
 	.align	4
 	.globl	_start
 	.type	_start, @function
-_start:	xorl	%ebp,%ebp
+_start:
+	.cfi_startproc
+	xorl	%ebp,%ebp
 	pushl	%ebp
+	.cfi_def_cfa_offset 4
 	movl	%esp,%ebp
+	.cfi_offset %ebp,-8
+	.cfi_def_cfa_register %ebp
 	andl	$0xfffffff0,%esp # align stack
 	leal	8(%ebp),%eax
 	pushl	%eax		# argv
 	pushl	4(%ebp)		# argc
 	pushl	%edx		# rtld cleanup
 	call	_start1
+	int3
+	.cfi_endproc
 	.size	_start, . - _start
 
 	.ident	"$FreeBSD$"
-- 
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