1 # Copyright 2010-2012 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] || [target_info exists use_gdb_stub]
18 || ![istarget *-linux*] || [skip_shlib_tests]} {
22 load_lib prelink-support.exp
24 set test "attach-pie-misread"
26 set genfile ${objdir}/${subdir}/${test}-gen.h
27 set executable ${test}
28 set binfile ${objdir}/${subdir}/${executable}
30 if {[build_executable_own_libs ${test}.exp $executable $srcfile [list additional_flags=-fPIE ldflags=-pie]] == ""} {
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
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"
51 if ![regexp {\nProgram Headers:\n *Type [^\n]* Align\n(.*?)\n\n} $output trash phdr] {
52 fail "$test (no Program Headers)"
55 if ![regexp -line {^ *DYNAMIC +0x[0-9a-f]+ +(0x[0-9a-f]+) } $phdr trash dynamic_vaddr] {
56 fail "$test (no DYNAMIC found)"
59 verbose -log "dynamic_vaddr is $dynamic_vaddr"
61 foreach {trash align} [regexp -line -all -inline {^ *LOAD .* (0x[0-9]+)$} $phdr] {
62 if {$align_max < $align} {
66 verbose -log "align_max is $align_max"
67 if {$align_max == -1} {
68 fail "$test (no LOAD found)"
72 return [list $dynamic_vaddr $align_max]
75 set phdr [read_phdr $binfile "readelf initial scan"]
76 set dynamic_vaddr [lindex $phdr 0]
77 set align_max [lindex $phdr 1]
79 set stub_size [format 0x%x [expr "2 * $align_max - ($dynamic_vaddr & ($align_max - 1))"]]
80 verbose -log "stub_size is $stub_size"
82 # On x86_64 it is commonly about 4MB.
83 if {$stub_size > 25000000} {
84 xfail "stub size $stub_size is too large"
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"
100 set prelink_args [build_executable_own_libs ${test}.exp $executable $srcfile [list "additional_flags=-fPIE -DGEN=\"$genfile\"" "ldflags=-pie"]]
101 if {$prelink_args == ""} {
105 # x86_64 file has 25MB, no need to keep it.
106 file delete -- $genfile
108 set phdr [read_phdr $binfile "readelf rebuilt with stub_size"]
109 set dynamic_vaddr_prelinkno [lindex $phdr 0]
111 if ![prelink_yes $prelink_args] {
115 set phdr [read_phdr $binfile "readelf with prelink -R"]
116 set dynamic_vaddr_prelinkyes [lindex $phdr 0]
118 set first_offset [format 0x%x [expr $dynamic_vaddr_prelinkyes - $dynamic_vaddr_prelinkno]]
119 verbose -log "first_offset is $first_offset"
121 set test "first offset is non-zero"
122 if {$first_offset == 0} {
123 fail "$test (-fPIE -pie in effect?)"
128 set test "start inferior"
131 set res [remote_spawn host $binfile];
132 if { $res < 0 || $res == "" } {
133 perror "Spawning $binfile failed."
137 set pid [exp_pid -i $res]
144 remote_exec host "kill -9 $pid"
148 fail "$test (timeout)"
149 remote_exec host "kill -9 $pid"
154 # Due to alignments it was reproducible with 1 on x86_64 but 2 on i686.
155 foreach align_mult {1 2} { with_test_prefix " shift-by-$align_mult:" {
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"
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.
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 $output"
171 set test "prelink -r"
172 if {$result == 0 && $output == ""} {
178 clean_restart $executable
181 gdb_test_multiple "attach $pid" $test {
182 -re "Attaching to program: .*, process $pid\r\n" {
183 # Missing "$gdb_prompt $" is intentional.
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 $" {
193 -re "$gdb_prompt $" {
198 gdb_test "detach" "Detaching from program: .*"
201 remote_exec host "kill -9 $pid"