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
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
|
# Copyright 2009-2018 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.
# Test amd64 displaced stepping.
if { ![istarget x86_64-*-* ] || ![is_lp64_target] } {
verbose "Skipping x86_64 displaced stepping tests."
return
}
set newline "\[\r\n\]*"
set opts {debug nopie}
standard_testfile .S
if { [prepare_for_testing "failed to prepare" $testfile $srcfile $opts] } {
return -1
}
gdb_test "set displaced-stepping on" ""
gdb_test "show displaced-stepping" ".* displaced stepping .* is on.*"
if ![runto_main] then {
fail "can't run to main"
return 0
}
##########################################
# Test call/ret.
gdb_test "break test_call" \
"Breakpoint.*at.* file .*$srcfile, line.*" \
"break test_call"
gdb_test "break test_call_end" \
"Breakpoint.*at.* file .*$srcfile, line.*" \
"break test_call_end"
gdb_test "break test_ret" \
"Breakpoint.*at.* file .*$srcfile, line.*" \
"break test_ret"
gdb_test "break test_ret_end" \
"Breakpoint.*at.* file .*$srcfile, line.*" \
"break test_ret_end"
gdb_test "continue" \
"Continuing.*Breakpoint.*, test_call ().*" \
"continue to test_call"
gdb_test "continue" \
"Continuing.*Breakpoint.*, test_call_end ().*" \
"continue to test_call_end"
gdb_test "continue" \
"Continuing.*Breakpoint.*, test_ret ().*" \
"continue to test_ret"
gdb_test "continue" \
"Continuing.*Breakpoint.*, test_ret_end ().*" \
"continue to test_ret_end"
##########################################
# Test abs-jmp/rep-ret.
gdb_test "break test_abs_jmp" \
"Breakpoint.*at.* file .*$srcfile, line.*" \
"break test_abs_jmp"
gdb_test "break test_abs_jmp_end" \
"Breakpoint.*at.* file .*$srcfile, line.*" \
"break test_abs_jmp_end"
gdb_test "break test_rep_ret" \
"Breakpoint.*at.* file .*$srcfile, line.*" \
"break test_rep_ret"
gdb_test "break test_rep_ret_end" \
"Breakpoint.*at.* file .*$srcfile, line.*" \
"break test_rep_ret_end"
gdb_test "continue" \
"Continuing.*Breakpoint.*, test_abs_jmp ().*" \
"continue to test_abs_jmp"
gdb_test "continue" \
"Continuing.*Breakpoint.*, test_abs_jmp_end ().*" \
"continue to test_abs_jmp_end"
gdb_test "continue" \
"Continuing.*Breakpoint.*, test_rep_ret ().*" \
"continue to test_rep_ret"
gdb_test "continue" \
"Continuing.*Breakpoint.*, test_rep_ret_end ().*" \
"continue to test_rep_ret_end"
##########################################
# Test syscall.
gdb_test "break test_syscall" \
"Breakpoint.*at.* file .*$srcfile, line.*" \
"break test_syscall"
gdb_test "break test_syscall_end" \
"Breakpoint.*at.* file .*$srcfile, line.*" \
"break test_syscall_end"
gdb_test "continue" \
"Continuing.*Breakpoint.*, test_syscall ().*" \
"continue to test_syscall"
gdb_test "continue" \
"Continuing.*Breakpoint.*, test_syscall_end ().*" \
"continue to test_syscall_end"
##########################################
# int3 (with prefixes)
# These don't occur in normal code, but gdb should still DTRT.
gdb_test "break test_int3" \
"Breakpoint.*at.* file .*$srcfile, line.*" \
"break test_int3"
gdb_test "break test_int3_end" \
"Breakpoint.*at.* file .*$srcfile, line.*" \
"break test_int3_end"
gdb_test "continue" \
"Continuing.*Breakpoint.*, test_int3 ().*" \
"continue to test_int3"
gdb_test "continue" \
"Continuing.*Breakpoint.*, test_int3_end ().*" \
"continue to test_int3_end"
##########################################
# Test rip-relative.
# GDB picks a spare register to hold the rip-relative address.
# Exercise all the possibilities (rax-rdi, sans rsp).
# The order must much the order in srcfile.
set rip_regs { "rax" "rbx" "rcx" "rdx" "rbp" "rsi" "rdi" }
# Assign val to all specified regs.
proc set_regs { regs val } {
global gdb_prompt
foreach reg ${regs} {
# Use send_gdb/gdb_expect so that these aren't logged as pass/fail.
send_gdb "set \$${reg} = ${val}\n"
gdb_expect 10 {
-re "$gdb_prompt $" {
verbose "Setting ${reg} to ${val}." 2
}
timeout {
warning "Couldn't set ${reg} to ${val}."
}
}
}
}
# Verify all REGS equal VAL, except REG which equals REG_VAL.
proc verify_regs { test_name regs val except_reg except_reg_val } {
global newline
foreach reg ${regs} {
set expected ${val}
if { "${reg}" == "${except_reg}" } {
set expected ${except_reg_val}
}
# The cast to (int) is because RBP is printed as a pointer.
gdb_test "p (int) \$${reg}" " = ${expected}${newline}" "${test_name} ${reg} expected value"
}
}
proc rip_test { reg } {
global srcfile rip_regs
set test_start_label "test_rip_${reg}"
set test_end_label "test_rip_${reg}_end"
gdb_test "break ${test_start_label}" \
"Breakpoint.*at.* file .*$srcfile, line.*" \
"break ${test_start_label}"
gdb_test "break ${test_end_label}" \
"Breakpoint.*at.* file .*$srcfile, line.*" \
"break ${test_end_label}"
gdb_test "continue" \
"Continuing.*Breakpoint.*, ${test_start_label} ().*" \
"continue to ${test_start_label}"
set_regs ${rip_regs} 0
gdb_test "continue" \
"Continuing.*Breakpoint.*, ${test_end_label} ().*" \
"continue to ${test_end_label}"
verify_regs "test rip w/${reg}" ${rip_regs} 0 ${reg} 42
}
foreach reg ${rip_regs} {
rip_test $reg
}
##########################################
# Done, run program to exit.
gdb_continue_to_end "amd64-disp-step"
|
