1 # Copyright 2010, 2011 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 # This test only works on GNU/Linux.
17 if { ![isnative] || [is_remote host] || ![istarget *-linux*] || [skip_shlib_tests]} {
21 load_lib prelink-support.exp
23 set test "attach-pie-misread"
25 set genfile ${objdir}/${subdir}/${test}-gen.h
26 set executable ${test}
27 set binfile ${objdir}/${subdir}/${executable}
29 if {[build_executable_own_libs ${test}.exp $executable $srcfile [list "additional_flags=-fPIE -pie"]] == ""} {
34 # Type Offset VirtAddr PhysAddr FileSiz MemSiz Flg Align
35 # LOAD 0x000000 0x0000000000400000 0x0000000000400000 0x134f5ec 0x134f5ec R E 0x200000
36 # LOAD 0x134f5f0 0x000000000194f5f0 0x000000000194f5f0 0x1dbc60 0x214088 RW 0x200000
37 # DYNAMIC 0x134f618 0x000000000194f618 0x000000000194f618 0x000200 0x000200 RW 0x8
39 proc read_phdr {binfile test} {
40 set readelf_program [transform readelf]
41 set command "exec $readelf_program -Wl $binfile"
42 verbose -log "command is $command"
43 set result [catch $command output]
44 verbose -log "result is $result"
45 verbose -log "output is $output"
50 if ![regexp {\nProgram Headers:\n *Type [^\n]* Align\n(.*?)\n\n} $output trash phdr] {
51 fail "$test (no Program Headers)"
54 if ![regexp -line {^ *DYNAMIC +0x[0-9a-f]+ +(0x[0-9a-f]+) } $phdr trash dynamic_vaddr] {
55 fail "$test (no DYNAMIC found)"
58 verbose -log "dynamic_vaddr is $dynamic_vaddr"
60 foreach {trash align} [regexp -line -all -inline {^ *LOAD .* (0x[0-9]+)$} $phdr] {
61 if {$align_max < $align} {
65 verbose -log "align_max is $align_max"
66 if {$align_max == -1} {
67 fail "$test (no LOAD found)"
71 return [list $dynamic_vaddr $align_max]
74 set phdr [read_phdr $binfile "readelf initial scan"]
75 set dynamic_vaddr [lindex $phdr 0]
76 set align_max [lindex $phdr 1]
78 set stub_size [format 0x%x [expr "2 * $align_max - ($dynamic_vaddr & ($align_max - 1))"]]
79 verbose -log "stub_size is $stub_size"
81 # On x86_64 it is commonly about 4MB.
82 if {$stub_size > 25000000} {
83 xfail "stub size $stub_size is too large"
87 set test "generate stub"
88 set command "exec $binfile $stub_size >$genfile"
89 verbose -log "command is $command"
90 set result [catch $command output]
91 verbose -log "result is $result"
92 verbose -log "output is $output"
99 set prelink_args [build_executable_own_libs ${test}.exp $executable $srcfile [list "additional_flags=-fPIE -pie -DGEN=\"$genfile\""]]
100 if {$prelink_args == ""} {
104 # x86_64 file has 25MB, no need to keep it.
105 file delete -- $genfile
107 set phdr [read_phdr $binfile "readelf rebuilt with stub_size"]
108 set dynamic_vaddr_prelinkno [lindex $phdr 0]
110 if ![prelink_yes $prelink_args] {
114 set phdr [read_phdr $binfile "readelf with prelink -R"]
115 set dynamic_vaddr_prelinkyes [lindex $phdr 0]
117 set first_offset [format 0x%x [expr $dynamic_vaddr_prelinkyes - $dynamic_vaddr_prelinkno]]
118 verbose -log "first_offset is $first_offset"
120 set test "first offset is non-zero"
121 if {$first_offset == 0} {
122 fail "$test (-fPIE -pie in effect?)"
127 set test "start inferior"
130 set res [remote_spawn host $binfile];
131 if { $res < 0 || $res == "" } {
132 perror "Spawning $binfile failed."
136 set pid [exp_pid -i $res]
143 remote_exec host "kill -9 $pid"
147 fail "$test (timeout)"
148 remote_exec host "kill -9 $pid"
153 # Due to alignments it was reproducible with 1 on x86_64 but 2 on i686.
154 foreach align_mult {1 2} {
155 set old_ldprefix $pf_prefix
156 lappend pf_prefix "shift-by-$align_mult:"
158 # FIXME: We believe there is enough room under FIRST_OFFSET.
159 set shifted_offset [format 0x%x [expr "$first_offset - $align_mult * $align_max"]]
160 verbose -log "shifted_offset is $shifted_offset"
162 # For normal prelink (prelink_yes call), we need to supply $prelink_args.
163 # For the prelink `-r' option below, $prelink_args is not required.
164 # Moreover, if it was used, the problem would not longer be reproducible
165 # as the libraries would also get relocated.
166 set command "exec /usr/sbin/prelink -q -N --no-exec-shield -r $shifted_offset $binfile"
167 verbose -log "command is $command"
168 set result [catch $command output]
169 verbose -log "result is $result"
170 verbose -log "output is $output"
172 set test "prelink -r"
173 if {$result == 0 && $output == ""} {
179 clean_restart $executable
182 gdb_test_multiple "attach $pid" $test {
183 -re "Attaching to program: .*, process $pid\r\n" {
184 # Missing "$gdb_prompt $" is intentional.
189 set test "error on Cannot access memory at address"
190 gdb_test_multiple "" $test {
191 -re "\r\nCannot access memory at address .*$gdb_prompt $" {
194 -re "$gdb_prompt $" {
199 gdb_test "detach" "Detaching from program: .*"
201 set pf_prefix $old_ldprefix
204 remote_exec host "kill -9 $pid"