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28e7fd62 | 1 | # Copyright 2010-2013 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. | |
3a3dad98 JK |
17 | if { ![isnative] || [is_remote host] || [target_info exists use_gdb_stub] |
18 | || ![istarget *-linux*] || [skip_shlib_tests]} { | |
86e4bafc JK |
19 | continue |
20 | } | |
21 | ||
5e3b36f8 JK |
22 | load_lib prelink-support.exp |
23 | ||
86e4bafc JK |
24 | set test "attach-pie-misread" |
25 | set srcfile ${test}.c | |
26 | set genfile ${objdir}/${subdir}/${test}-gen.h | |
27 | set executable ${test} | |
28 | set binfile ${objdir}/${subdir}/${executable} | |
29 | ||
9241a8bc | 30 | if {[build_executable_own_libs ${test}.exp $executable $srcfile [list additional_flags=-fPIE ldflags=-pie]] == ""} { |
86e4bafc JK |
31 | return -1 |
32 | } | |
33 | ||
34 | # Program Headers: | |
35 | # Type Offset VirtAddr PhysAddr FileSiz MemSiz Flg Align | |
36 | # LOAD 0x000000 0x0000000000400000 0x0000000000400000 0x134f5ec 0x134f5ec R E 0x200000 | |
37 | # LOAD 0x134f5f0 0x000000000194f5f0 0x000000000194f5f0 0x1dbc60 0x214088 RW 0x200000 | |
38 | # DYNAMIC 0x134f618 0x000000000194f618 0x000000000194f618 0x000200 0x000200 RW 0x8 | |
39 | # | |
40 | proc read_phdr {binfile test} { | |
41 | set readelf_program [transform readelf] | |
42 | set command "exec $readelf_program -Wl $binfile" | |
43 | verbose -log "command is $command" | |
44 | set result [catch $command output] | |
45 | verbose -log "result is $result" | |
46 | verbose -log "output is $output" | |
47 | if {$result != 0} { | |
48 | fail $test | |
49 | return | |
50 | } | |
51 | if ![regexp {\nProgram Headers:\n *Type [^\n]* Align\n(.*?)\n\n} $output trash phdr] { | |
52 | fail "$test (no Program Headers)" | |
53 | return | |
54 | } | |
55 | if ![regexp -line {^ *DYNAMIC +0x[0-9a-f]+ +(0x[0-9a-f]+) } $phdr trash dynamic_vaddr] { | |
56 | fail "$test (no DYNAMIC found)" | |
57 | return | |
58 | } | |
59 | verbose -log "dynamic_vaddr is $dynamic_vaddr" | |
60 | set align_max -1 | |
61 | foreach {trash align} [regexp -line -all -inline {^ *LOAD .* (0x[0-9]+)$} $phdr] { | |
62 | if {$align_max < $align} { | |
63 | set align_max $align | |
64 | } | |
65 | } | |
66 | verbose -log "align_max is $align_max" | |
67 | if {$align_max == -1} { | |
68 | fail "$test (no LOAD found)" | |
69 | return | |
70 | } | |
71 | pass $test | |
72 | return [list $dynamic_vaddr $align_max] | |
73 | } | |
74 | ||
75 | set phdr [read_phdr $binfile "readelf initial scan"] | |
76 | set dynamic_vaddr [lindex $phdr 0] | |
77 | set align_max [lindex $phdr 1] | |
78 | ||
79 | set stub_size [format 0x%x [expr "2 * $align_max - ($dynamic_vaddr & ($align_max - 1))"]] | |
80 | verbose -log "stub_size is $stub_size" | |
81 | ||
82 | # On x86_64 it is commonly about 4MB. | |
83 | if {$stub_size > 25000000} { | |
84 | xfail "stub size $stub_size is too large" | |
85 | return | |
86 | } | |
87 | ||
88 | set test "generate stub" | |
89 | set command "exec $binfile $stub_size >$genfile" | |
90 | verbose -log "command is $command" | |
91 | set result [catch $command output] | |
92 | verbose -log "result is $result" | |
93 | verbose -log "output is $output" | |
94 | if {$result == 0} { | |
95 | pass $test | |
96 | } else { | |
97 | fail $test | |
98 | } | |
99 | ||
9241a8bc | 100 | set prelink_args [build_executable_own_libs ${test}.exp $executable $srcfile [list "additional_flags=-fPIE -DGEN=\"$genfile\"" "ldflags=-pie"]] |
5e3b36f8 | 101 | if {$prelink_args == ""} { |
86e4bafc JK |
102 | return -1 |
103 | } | |
104 | ||
105 | # x86_64 file has 25MB, no need to keep it. | |
106 | file delete -- $genfile | |
107 | ||
108 | set phdr [read_phdr $binfile "readelf rebuilt with stub_size"] | |
109 | set dynamic_vaddr_prelinkno [lindex $phdr 0] | |
110 | ||
5e3b36f8 | 111 | if ![prelink_yes $prelink_args] { |
86e4bafc | 112 | return -1 |
86e4bafc JK |
113 | } |
114 | ||
115 | set phdr [read_phdr $binfile "readelf with prelink -R"] | |
116 | set dynamic_vaddr_prelinkyes [lindex $phdr 0] | |
117 | ||
118 | set first_offset [format 0x%x [expr $dynamic_vaddr_prelinkyes - $dynamic_vaddr_prelinkno]] | |
119 | verbose -log "first_offset is $first_offset" | |
120 | ||
121 | set test "first offset is non-zero" | |
122 | if {$first_offset == 0} { | |
123 | fail "$test (-fPIE -pie in effect?)" | |
124 | } else { | |
125 | pass $test | |
126 | } | |
127 | ||
128 | set test "start inferior" | |
129 | gdb_exit | |
130 | ||
4ec70201 | 131 | set res [remote_spawn host $binfile] |
86e4bafc JK |
132 | if { $res < 0 || $res == "" } { |
133 | perror "Spawning $binfile failed." | |
134 | fail $test | |
135 | return | |
136 | } | |
137 | set pid [exp_pid -i $res] | |
138 | gdb_expect { | |
139 | -re "sleeping\r\n" { | |
140 | pass $test | |
141 | } | |
142 | eof { | |
143 | fail "$test (eof)" | |
144 | remote_exec host "kill -9 $pid" | |
145 | return | |
146 | } | |
147 | timeout { | |
148 | fail "$test (timeout)" | |
149 | remote_exec host "kill -9 $pid" | |
150 | return | |
151 | } | |
152 | } | |
153 | ||
154 | # Due to alignments it was reproducible with 1 on x86_64 but 2 on i686. | |
0f4d39d5 | 155 | foreach align_mult {1 2} { with_test_prefix "shift-by-$align_mult" { |
86e4bafc JK |
156 | |
157 | # FIXME: We believe there is enough room under FIRST_OFFSET. | |
158 | set shifted_offset [format 0x%x [expr "$first_offset - $align_mult * $align_max"]] | |
159 | verbose -log "shifted_offset is $shifted_offset" | |
160 | ||
5e3b36f8 JK |
161 | # For normal prelink (prelink_yes call), we need to supply $prelink_args. |
162 | # For the prelink `-r' option below, $prelink_args is not required. | |
163 | # Moreover, if it was used, the problem would not longer be reproducible | |
164 | # as the libraries would also get relocated. | |
86e4bafc JK |
165 | set command "exec /usr/sbin/prelink -q -N --no-exec-shield -r $shifted_offset $binfile" |
166 | verbose -log "command is $command" | |
167 | set result [catch $command output] | |
168 | verbose -log "result is $result" | |
169 | verbose -log "output is $output" | |
170 | ||
171 | set test "prelink -r" | |
172 | if {$result == 0 && $output == ""} { | |
173 | pass $test | |
174 | } else { | |
175 | fail $test | |
176 | } | |
177 | ||
178 | clean_restart $executable | |
179 | ||
180 | set test "attach" | |
181 | gdb_test_multiple "attach $pid" $test { | |
182 | -re "Attaching to program: .*, process $pid\r\n" { | |
183 | # Missing "$gdb_prompt $" is intentional. | |
184 | pass $test | |
185 | } | |
186 | } | |
187 | ||
188 | set test "error on Cannot access memory at address" | |
189 | gdb_test_multiple "" $test { | |
190 | -re "\r\nCannot access memory at address .*$gdb_prompt $" { | |
191 | fail $test | |
192 | } | |
193 | -re "$gdb_prompt $" { | |
194 | pass $test | |
195 | } | |
196 | } | |
197 | ||
198 | gdb_test "detach" "Detaching from program: .*" | |
6a5870ce | 199 | }} |
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200 | |
201 | remote_exec host "kill -9 $pid" |