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b811d2c2 | 1 | # Copyright 2010-2020 Free Software Foundation, Inc. |
86e4bafc JK |
2 | |
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. | |
7 | # | |
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. | |
12 | # | |
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/>. | |
15 | ||
16 | # This test only works on GNU/Linux. | |
079670b9 | 17 | if { ![isnative] || [is_remote host] || [use_gdb_stub] |
3a3dad98 | 18 | || ![istarget *-linux*] || [skip_shlib_tests]} { |
86e4bafc JK |
19 | continue |
20 | } | |
21 | ||
5e3b36f8 JK |
22 | load_lib prelink-support.exp |
23 | ||
a64d2530 TT |
24 | standard_testfile .c |
25 | set genfile [standard_output_file ${testfile}-gen.h] | |
26 | set executable $testfile | |
86e4bafc | 27 | |
a64d2530 | 28 | if {[build_executable_own_libs ${testfile}.exp $executable $srcfile [list additional_flags=-fPIE ldflags=-pie]] == ""} { |
86e4bafc JK |
29 | return -1 |
30 | } | |
31 | ||
32 | # Program Headers: | |
33 | # Type Offset VirtAddr PhysAddr FileSiz MemSiz Flg Align | |
34 | # LOAD 0x000000 0x0000000000400000 0x0000000000400000 0x134f5ec 0x134f5ec R E 0x200000 | |
35 | # LOAD 0x134f5f0 0x000000000194f5f0 0x000000000194f5f0 0x1dbc60 0x214088 RW 0x200000 | |
36 | # DYNAMIC 0x134f618 0x000000000194f618 0x000000000194f618 0x000200 0x000200 RW 0x8 | |
37 | # | |
38 | proc read_phdr {binfile test} { | |
4fa7d390 | 39 | set readelf_program [gdb_find_readelf] |
86e4bafc JK |
40 | set command "exec $readelf_program -Wl $binfile" |
41 | verbose -log "command is $command" | |
42 | set result [catch $command output] | |
43 | verbose -log "result is $result" | |
44 | verbose -log "output is $output" | |
45 | if {$result != 0} { | |
46 | fail $test | |
47 | return | |
48 | } | |
49 | if ![regexp {\nProgram Headers:\n *Type [^\n]* Align\n(.*?)\n\n} $output trash phdr] { | |
50 | fail "$test (no Program Headers)" | |
51 | return | |
52 | } | |
53 | if ![regexp -line {^ *DYNAMIC +0x[0-9a-f]+ +(0x[0-9a-f]+) } $phdr trash dynamic_vaddr] { | |
54 | fail "$test (no DYNAMIC found)" | |
55 | return | |
56 | } | |
57 | verbose -log "dynamic_vaddr is $dynamic_vaddr" | |
58 | set align_max -1 | |
59 | foreach {trash align} [regexp -line -all -inline {^ *LOAD .* (0x[0-9]+)$} $phdr] { | |
60 | if {$align_max < $align} { | |
61 | set align_max $align | |
62 | } | |
63 | } | |
64 | verbose -log "align_max is $align_max" | |
65 | if {$align_max == -1} { | |
66 | fail "$test (no LOAD found)" | |
67 | return | |
68 | } | |
69 | pass $test | |
70 | return [list $dynamic_vaddr $align_max] | |
71 | } | |
72 | ||
73 | set phdr [read_phdr $binfile "readelf initial scan"] | |
74 | set dynamic_vaddr [lindex $phdr 0] | |
75 | set align_max [lindex $phdr 1] | |
76 | ||
77 | set stub_size [format 0x%x [expr "2 * $align_max - ($dynamic_vaddr & ($align_max - 1))"]] | |
78 | verbose -log "stub_size is $stub_size" | |
79 | ||
80 | # On x86_64 it is commonly about 4MB. | |
81 | if {$stub_size > 25000000} { | |
82 | xfail "stub size $stub_size is too large" | |
83 | return | |
84 | } | |
85 | ||
86 | set test "generate stub" | |
87 | set command "exec $binfile $stub_size >$genfile" | |
88 | verbose -log "command is $command" | |
89 | set result [catch $command output] | |
90 | verbose -log "result is $result" | |
91 | verbose -log "output is $output" | |
92 | if {$result == 0} { | |
93 | pass $test | |
94 | } else { | |
95 | fail $test | |
96 | } | |
97 | ||
9241a8bc | 98 | set prelink_args [build_executable_own_libs ${test}.exp $executable $srcfile [list "additional_flags=-fPIE -DGEN=\"$genfile\"" "ldflags=-pie"]] |
5e3b36f8 | 99 | if {$prelink_args == ""} { |
86e4bafc JK |
100 | return -1 |
101 | } | |
102 | ||
103 | # x86_64 file has 25MB, no need to keep it. | |
104 | file delete -- $genfile | |
105 | ||
106 | set phdr [read_phdr $binfile "readelf rebuilt with stub_size"] | |
107 | set dynamic_vaddr_prelinkno [lindex $phdr 0] | |
108 | ||
5e3b36f8 | 109 | if ![prelink_yes $prelink_args] { |
86e4bafc | 110 | return -1 |
86e4bafc JK |
111 | } |
112 | ||
113 | set phdr [read_phdr $binfile "readelf with prelink -R"] | |
114 | set dynamic_vaddr_prelinkyes [lindex $phdr 0] | |
115 | ||
116 | set first_offset [format 0x%x [expr $dynamic_vaddr_prelinkyes - $dynamic_vaddr_prelinkno]] | |
117 | verbose -log "first_offset is $first_offset" | |
118 | ||
119 | set test "first offset is non-zero" | |
120 | if {$first_offset == 0} { | |
121 | fail "$test (-fPIE -pie in effect?)" | |
122 | } else { | |
123 | pass $test | |
124 | } | |
125 | ||
126 | set test "start inferior" | |
127 | gdb_exit | |
128 | ||
2c8c5d37 PA |
129 | set test_spawn_id [remote_spawn host $binfile] |
130 | if { $test_spawn_id < 0 || $test_spawn_id == "" } { | |
86e4bafc JK |
131 | perror "Spawning $binfile failed." |
132 | fail $test | |
133 | return | |
134 | } | |
2c8c5d37 | 135 | set testpid [spawn_id_get_pid $test_spawn_id] |
86e4bafc JK |
136 | gdb_expect { |
137 | -re "sleeping\r\n" { | |
138 | pass $test | |
139 | } | |
140 | eof { | |
141 | fail "$test (eof)" | |
2c8c5d37 | 142 | wait -i $test_spawn_id |
86e4bafc JK |
143 | return |
144 | } | |
145 | timeout { | |
146 | fail "$test (timeout)" | |
2c8c5d37 | 147 | kill_wait_spawned_process $test_spawn_id |
86e4bafc JK |
148 | return |
149 | } | |
150 | } | |
151 | ||
152 | # Due to alignments it was reproducible with 1 on x86_64 but 2 on i686. | |
0f4d39d5 | 153 | foreach align_mult {1 2} { with_test_prefix "shift-by-$align_mult" { |
86e4bafc JK |
154 | |
155 | # FIXME: We believe there is enough room under FIRST_OFFSET. | |
156 | set shifted_offset [format 0x%x [expr "$first_offset - $align_mult * $align_max"]] | |
157 | verbose -log "shifted_offset is $shifted_offset" | |
158 | ||
5e3b36f8 JK |
159 | # For normal prelink (prelink_yes call), we need to supply $prelink_args. |
160 | # For the prelink `-r' option below, $prelink_args is not required. | |
161 | # Moreover, if it was used, the problem would not longer be reproducible | |
162 | # as the libraries would also get relocated. | |
86e4bafc JK |
163 | set command "exec /usr/sbin/prelink -q -N --no-exec-shield -r $shifted_offset $binfile" |
164 | verbose -log "command is $command" | |
165 | set result [catch $command output] | |
166 | verbose -log "result is $result" | |
167 | verbose -log "output is $output" | |
168 | ||
169 | set test "prelink -r" | |
170 | if {$result == 0 && $output == ""} { | |
171 | pass $test | |
172 | } else { | |
173 | fail $test | |
174 | } | |
175 | ||
176 | clean_restart $executable | |
177 | ||
178 | set test "attach" | |
2c8c5d37 PA |
179 | gdb_test_multiple "attach $testpid" $test { |
180 | -re "Attaching to program: .*, process $testpid\r\n" { | |
86e4bafc JK |
181 | # Missing "$gdb_prompt $" is intentional. |
182 | pass $test | |
183 | } | |
184 | } | |
185 | ||
186 | set test "error on Cannot access memory at address" | |
187 | gdb_test_multiple "" $test { | |
188 | -re "\r\nCannot access memory at address .*$gdb_prompt $" { | |
189 | fail $test | |
190 | } | |
191 | -re "$gdb_prompt $" { | |
192 | pass $test | |
193 | } | |
194 | } | |
195 | ||
196 | gdb_test "detach" "Detaching from program: .*" | |
6a5870ce | 197 | }} |
86e4bafc | 198 | |
2c8c5d37 | 199 | kill_wait_spawned_process $test_spawn_id |