1 # Copyright 2014-2020 Free Software Foundation, Inc.
3 # This program is free software; you can redistribute it and/or modify
4 # it under the terms of the GNU General Public License as published by
5 # the Free Software Foundation; either version 3 of the License, or
6 # (at your option) any later version.
8 # This program is distributed in the hope that it will be useful,
9 # but WITHOUT ANY WARRANTY; without even the implied warranty of
10 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
11 # GNU General Public License for more details.
13 # You should have received a copy of the GNU General Public License
14 # along with this program. If not, see <http://www.gnu.org/licenses/>.
16 # Test the compare-sections command.
20 if {[prepare_for_testing "failed to prepare" $testfile $srcfile {debug}]} {
24 set is_pie [exec_is_pie $binfile]
26 # Run the compare-sections command along with any options as specified
27 # by OPTIONS, and check that no mismatch is found.
28 proc compare_sections { {options ""} } {
32 set command "compare-sections $options"
34 set command "compare-sections"
37 gdb_test_multiple $command $test {
38 -re "MIS-MATCHED.*$gdb_prompt $" {
41 -re "warning.*One or more sections.*does not match.*loaded file.*$gdb_prompt $" {
44 -re "Section.*matched.*$gdb_prompt $" {
52 with_test_prefix "after file" {
53 # Before starting the target, we're just comparing the
54 # executable's sections against themselves... This should never
60 # Load the file into the target.
63 with_test_prefix "after reload" {
64 # We're presumabily still stopped at the entry point. All
65 # sections should match.
70 # Try comparing just one section. Assume there's a .text section,
71 # which is a pretty safe bet.
72 set command "compare-sections .text"
73 set command_re [string_to_regexp $command]
75 gdb_test_multiple $command $test {
76 -re "^$command_re\r\nSection .text, range $hex -- $hex. matched\.\r\n$gdb_prompt $" {
81 # Now get past startup code.
82 if ![runto_main] then {
83 fail "can't run to main"
87 with_test_prefix "after run to main" {
88 # Assume all targets' startup code changes some loaded variable.
89 gdb_test "compare-sections" \
90 "MIS-MATCHED.*warning.*One or more sections.*does not match.*loaded file"
93 gdb_test "compare-sections -r" \
94 "MIS-MATCHED.*warning.*One or more sections.*does not match.*loaded file"
96 # Assume startup code doesn't change read-only sections.
101 # Now test that "compare-sections -r" works as expected. Look for an
102 # address in a read-only section, patch it, and check that
103 # "compare-sections -r" detects a mismatch.
104 with_test_prefix "read-only" {
106 set has_ro_sections 0
107 set test "list read-only sections"
108 gdb_test_multiple "maint info sections READONLY" $test {
109 -re "($hex)->$hex at $hex. \[^\r\n\]* READONLY.*$gdb_prompt $" {
110 set ro_address $expect_out(1,string)
111 set has_ro_sections 1
114 -re "$gdb_prompt $" {
119 if {!$has_ro_sections} {
120 unsupported "no read-only sections"
126 set test "get value of read-only section"
127 gdb_test_multiple "print /u *(unsigned char *) $ro_address" "$test" {
128 -re " = (\[0-9\]*).*$gdb_prompt $" {
129 set orig $expect_out(1,string)
135 untested "couldn't read address of read-only section"
139 # Come up with different value.
140 set patch [expr 255 - $orig]
142 # Write PATCH to memory.
144 set test "corrupt read-only section"
145 gdb_test_multiple "print /u *(unsigned char *) $ro_address = $patch" "$test" {
146 -re " = .*Cannot access memory at address $ro_address.*$gdb_prompt $" {
147 pass "$test (cannot write)"
149 -re " = (\[0-9\]*).*$gdb_prompt $" {
150 set written $expect_out(1,string)
155 if { $written != $patch } {
156 unsupported "can't patch read-only section"
160 gdb_test "compare-sections -r" \
161 "MIS-MATCHED.*warning.*One or more sections.*does not match.*loaded file.*"