1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
|
/*
Copyright 2009-2020 Free Software Foundation, Inc.
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>. */
/* Compile with "gcc -nostdlib dw2-restore.S" */
.text
.globl _start
.func _start
_start: call foo
mov $0,%rax
ret
.endfunc
.func foo
foo: .cfi_startproc
push %rbp
.cfi_adjust_cfa_offset 8
mov %rsp,%rbp
.cfi_def_cfa_register %rbp
.cfi_remember_state
jmp 2f
1: mov %rbp,%rsp
.cfi_restore %rbp
pop %rbp
.cfi_adjust_cfa_offset -8
.cfi_def_cfa_register %rsp
ret
.cfi_restore_state
2: movq $0,%rax
movq $0,(%rax) /* crash here */
jmp 1b
.cfi_endproc
.endfunc
|
