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
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
|
/* Copyright 2009-2017 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/>.
This file is part of the gdb testsuite.
It tests displaced stepping over various insns that require special
handling. */
.text
.global main
main:
nop
/***********************************************/
/* test call/ret */
.global test_call
test_call:
call test_call_subr
nop
.global test_ret_end
test_ret_end:
nop
/***********************************************/
/* test abs-jmp/rep-ret */
test_abs_jmp_setup:
mov $test_abs_jmp_return,%rdx
push %rdx
mov $test_abs_jmp_subr,%rdx
.global test_abs_jmp
test_abs_jmp:
jmp *%rdx
test_abs_jmp_return:
nop
.global test_rep_ret_end
test_rep_ret_end:
nop
/***********************************************/
/* test syscall */
.global test_syscall
mov $0x27,%eax /* getpid */
test_syscall:
syscall
nop
test_syscall_end:
nop
/***********************************************/
/* Test stepping over int3.
The prefixes are pointless, but it's possible, so we exercise it. */
nop
.global test_int3
test_int3:
repz
repz
int3
nop
.global test_int3_end
test_int3_end:
nop
/***********************************************/
/* test rip-relative
GDB picks a spare register to hold the rip-relative address.
Exercise all the possibilities (rax-rdi, sans rsp). */
.global test_rip_rax
test_rip_rax:
add answer(%rip),%rax
.global test_rip_rax_end
test_rip_rax_end:
nop
.global test_rip_rbx
test_rip_rbx:
add answer(%rip),%rbx
.global test_rip_rbx_end
test_rip_rbx_end:
nop
.global test_rip_rcx
test_rip_rcx:
add answer(%rip),%rcx
.global test_rip_rcx_end
test_rip_rcx_end:
nop
.global test_rip_rdx
test_rip_rdx:
add answer(%rip),%rdx
.global test_rip_rdx_end
test_rip_rdx_end:
nop
.global test_rip_rbp
test_rip_rbp:
add answer(%rip),%rbp
.global test_rip_rbp_end
test_rip_rbp_end:
nop
.global test_rip_rsi
test_rip_rsi:
add answer(%rip),%rsi
.global test_rip_rsi_end
test_rip_rsi_end:
nop
.global test_rip_rdi
test_rip_rdi:
add answer(%rip),%rdi
.global test_rip_rdi_end
test_rip_rdi_end:
nop
/* skip over test data */
jmp done
/* test rip-relative data */
answer: .8byte 42
/***********************************************/
/* all done */
done:
mov $0,%rdi
call exit
hlt
/***********************************************/
/* subroutine to help test call/ret */
test_call_subr:
nop
.global test_call_end
test_call_end:
nop
.global test_ret
test_ret:
ret
/***********************************************/
/* subroutine to help test abs-jmp/rep-ret */
test_abs_jmp_subr:
nop
.global test_abs_jmp_end
test_abs_jmp_end:
nop
.global test_rep_ret
test_rep_ret:
repz
ret
|
