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
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
|
/* Copyright (C) 2009-2014 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 <sigaltstack-offsets.h>
.section .rodata.str1.1,"aMS",@progbits,1
.type longjmp_msg,@object
longjmp_msg:
.string "longjmp causes uninitialized stack frame"
.size longjmp_msg, .-longjmp_msg
.text
#define __longjmp ____longjmp_chk
#ifdef PIC
# define CALL_FAIL \
mov.l .Lfail, r1; \
mov.l .Lstr, r4; \
mov.l r12, @-r15; \
cfi_remember_state; \
cfi_adjust_cfa_offset (4); \
cfi_rel_offset (r12, 0); \
mova .Lgot, r0; \
mov.l .Lgot, r12; \
add r0, r12; \
sts.l pr, @-r15; \
cfi_adjust_cfa_offset (4); \
cfi_rel_offset (pr, 0); \
bsrf r1; \
add r12, r4; \
.Lfail0: \
/* Unreachable. */ \
.align 2; \
.Lgot: \
.long _GLOBAL_OFFSET_TABLE_; \
.Lstr: \
.long longjmp_msg@GOTOFF; \
.Lfail: \
.long __GI___fortify_fail@PLT-(.Lfail0-.); \
cfi_restore_state;
#else
# define CALL_FAIL \
mov.l .Lfail, r1; \
mov.l .Lstr, r4; \
sts.l pr, @-r15; \
cfi_remember_state; \
cfi_adjust_cfa_offset (4); \
cfi_rel_offset (pr, 0); \
jsr @r1; \
nop; \
/* Unreachable. */ \
.align 2; \
.Lstr: \
.long longjmp_msg; \
.Lfail: \
.long __fortify_fail; \
cfi_restore_state;
#endif
#define CHECK_SP(reg) \
/* Jumping to a higher-address frame is always allowed. */ \
cmp/hs r15, reg; \
bt .Lok; \
\
mov.l r0, @-r15; /* The return value is already in here. */ \
cfi_adjust_cfa_offset (4); \
mov.l r1, @-r15; /* PTR_DEMANGLE helper. */ \
cfi_adjust_cfa_offset (4); \
mov.l r2, @-r15; /* The new SP value is already in here. */ \
cfi_adjust_cfa_offset (4); \
mov.l r4, @-r15; /* We'll still need this one. */ \
cfi_adjust_cfa_offset (4); \
add #-sizeSS, r15; \
cfi_adjust_cfa_offset (sizeSS); \
mov #0, r4; \
mov r15, r5; \
DO_CALL (sigaltstack, 2); \
/* Without working sigaltstack we cannot perform the test. */ \
tst r0, r0; \
bf .Lok2; \
mov.l @(oSS_FLAGS, r15), r0; \
tst #SS_ONSTACK, r0; \
bt .Lcall_fail; \
mov.l @(oSS_SIZE, r15), r2; \
mov.l @(oSS_SP, r15), r1; \
add r2, r1; \
sub r8, r1; \
cmp/hi r1, r2; \
bf .Lok2; \
.Lcall_fail: \
CALL_FAIL \
\
.Lok2: \
add #sizeSS, r15; \
cfi_adjust_cfa_offset (-sizeSS); \
mov.l @r15+, r4; \
cfi_adjust_cfa_offset (-4); \
mov.l @r15+, r2; \
cfi_adjust_cfa_offset (-4); \
mov.l @r15+, r1; \
cfi_adjust_cfa_offset (-4); \
mov.l @r15+, r0; \
cfi_adjust_cfa_offset (-4); \
.Lok:
#include <__longjmp.S>
|
