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
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
|
/* Copyright (C) 2009-2013 Free Software Foundation, Inc.
This file is part of the GNU C Library.
The GNU C Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
The GNU C Library 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
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with the GNU C Library; if not, see
<http://www.gnu.org/licenses/>. */
#include <sysdep.h>
#include <rtld-global-offsets.h>
.section .rodata.str1.8,"aMS",@progbits,1
.align 3
.LC0:
.string "longjmp causes uninitialized stack frame"
.section .toc,"aw"
.LC1:
.tc .LC0[TC],.LC0
.text
#define __longjmp ____longjmp_chk
#define CHECK_SP(reg) \
cmpld reg, r1; \
bge+ .Lok; \
mflr r0; \
std r0,FRAME_LR_SAVE(r1); \
mr r31,r3; \
mr r30,r4; \
stdu r1,-FRAME_MIN_SIZE-32(r1); \
cfi_remember_state; \
cfi_adjust_cfa_offset (FRAME_MIN_SIZE+32); \
cfi_offset (lr, FRAME_LR_SAVE); \
li r3,0; \
addi r4,r1,FRAME_MIN_SIZE; \
li r0,__NR_sigaltstack; \
sc; \
/* Without working sigaltstack we cannot perform the test. */ \
bso .Lok2; \
lwz r0,FRAME_MIN_SIZE+8(r1); \
andi. r4,r0,1; \
beq .Lfail; \
ld r0,FRAME_MIN_SIZE+16(r1); \
ld r4,FRAME_MIN_SIZE(r1); \
add r4,r4,r0; \
sub r3,r3,reg; \
cmpld r3,r0; \
bge+ .Lok2; \
.Lfail: \
ld r3,.LC1@toc(2); \
bl HIDDEN_JUMPTARGET (__fortify_fail); \
nop; \
.Lok2: \
mr r3,r31; \
mr r4,r30; \
cfi_restore_state; \
.Lok:
#include <__longjmp-common.S>
|
