202 lines
5.8 KiB
Plaintext
202 lines
5.8 KiB
Plaintext
# Copyright 2010-2013 Free Software Foundation, Inc.
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# This program is free software; you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation; either version 3 of the License, or
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# (at your option) any later version.
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with this program. If not, see <http://www.gnu.org/licenses/>.
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# This test only works on GNU/Linux.
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if { ![isnative] || [is_remote host] || [target_info exists use_gdb_stub]
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|| ![istarget *-linux*] || [skip_shlib_tests]} {
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continue
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}
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load_lib prelink-support.exp
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set test "attach-pie-misread"
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set srcfile ${test}.c
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set genfile ${objdir}/${subdir}/${test}-gen.h
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set executable ${test}
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set binfile ${objdir}/${subdir}/${executable}
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if {[build_executable_own_libs ${test}.exp $executable $srcfile [list additional_flags=-fPIE ldflags=-pie]] == ""} {
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return -1
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}
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# Program Headers:
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# Type Offset VirtAddr PhysAddr FileSiz MemSiz Flg Align
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# LOAD 0x000000 0x0000000000400000 0x0000000000400000 0x134f5ec 0x134f5ec R E 0x200000
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# LOAD 0x134f5f0 0x000000000194f5f0 0x000000000194f5f0 0x1dbc60 0x214088 RW 0x200000
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# DYNAMIC 0x134f618 0x000000000194f618 0x000000000194f618 0x000200 0x000200 RW 0x8
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#
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proc read_phdr {binfile test} {
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set readelf_program [transform readelf]
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set command "exec $readelf_program -Wl $binfile"
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verbose -log "command is $command"
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set result [catch $command output]
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verbose -log "result is $result"
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verbose -log "output is $output"
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if {$result != 0} {
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fail $test
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return
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}
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if ![regexp {\nProgram Headers:\n *Type [^\n]* Align\n(.*?)\n\n} $output trash phdr] {
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fail "$test (no Program Headers)"
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return
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}
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if ![regexp -line {^ *DYNAMIC +0x[0-9a-f]+ +(0x[0-9a-f]+) } $phdr trash dynamic_vaddr] {
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fail "$test (no DYNAMIC found)"
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return
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}
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verbose -log "dynamic_vaddr is $dynamic_vaddr"
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set align_max -1
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foreach {trash align} [regexp -line -all -inline {^ *LOAD .* (0x[0-9]+)$} $phdr] {
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if {$align_max < $align} {
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set align_max $align
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}
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}
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verbose -log "align_max is $align_max"
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if {$align_max == -1} {
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fail "$test (no LOAD found)"
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return
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}
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pass $test
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return [list $dynamic_vaddr $align_max]
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}
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set phdr [read_phdr $binfile "readelf initial scan"]
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set dynamic_vaddr [lindex $phdr 0]
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set align_max [lindex $phdr 1]
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set stub_size [format 0x%x [expr "2 * $align_max - ($dynamic_vaddr & ($align_max - 1))"]]
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verbose -log "stub_size is $stub_size"
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# On x86_64 it is commonly about 4MB.
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if {$stub_size > 25000000} {
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xfail "stub size $stub_size is too large"
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return
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}
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set test "generate stub"
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set command "exec $binfile $stub_size >$genfile"
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verbose -log "command is $command"
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set result [catch $command output]
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verbose -log "result is $result"
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verbose -log "output is $output"
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if {$result == 0} {
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pass $test
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} else {
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fail $test
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}
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set prelink_args [build_executable_own_libs ${test}.exp $executable $srcfile [list "additional_flags=-fPIE -DGEN=\"$genfile\"" "ldflags=-pie"]]
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if {$prelink_args == ""} {
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return -1
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}
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# x86_64 file has 25MB, no need to keep it.
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file delete -- $genfile
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set phdr [read_phdr $binfile "readelf rebuilt with stub_size"]
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set dynamic_vaddr_prelinkno [lindex $phdr 0]
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if ![prelink_yes $prelink_args] {
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return -1
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}
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set phdr [read_phdr $binfile "readelf with prelink -R"]
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set dynamic_vaddr_prelinkyes [lindex $phdr 0]
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set first_offset [format 0x%x [expr $dynamic_vaddr_prelinkyes - $dynamic_vaddr_prelinkno]]
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verbose -log "first_offset is $first_offset"
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set test "first offset is non-zero"
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if {$first_offset == 0} {
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fail "$test (-fPIE -pie in effect?)"
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} else {
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pass $test
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}
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set test "start inferior"
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gdb_exit
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set res [remote_spawn host $binfile]
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if { $res < 0 || $res == "" } {
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perror "Spawning $binfile failed."
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fail $test
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return
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}
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set pid [exp_pid -i $res]
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gdb_expect {
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-re "sleeping\r\n" {
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pass $test
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}
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eof {
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fail "$test (eof)"
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remote_exec host "kill -9 $pid"
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return
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}
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timeout {
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fail "$test (timeout)"
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remote_exec host "kill -9 $pid"
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return
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}
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}
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# Due to alignments it was reproducible with 1 on x86_64 but 2 on i686.
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foreach align_mult {1 2} { with_test_prefix "shift-by-$align_mult" {
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# FIXME: We believe there is enough room under FIRST_OFFSET.
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set shifted_offset [format 0x%x [expr "$first_offset - $align_mult * $align_max"]]
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verbose -log "shifted_offset is $shifted_offset"
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# For normal prelink (prelink_yes call), we need to supply $prelink_args.
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# For the prelink `-r' option below, $prelink_args is not required.
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# Moreover, if it was used, the problem would not longer be reproducible
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# as the libraries would also get relocated.
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set command "exec /usr/sbin/prelink -q -N --no-exec-shield -r $shifted_offset $binfile"
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verbose -log "command is $command"
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set result [catch $command output]
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verbose -log "result is $result"
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verbose -log "output is $output"
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set test "prelink -r"
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if {$result == 0 && $output == ""} {
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pass $test
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} else {
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fail $test
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}
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clean_restart $executable
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set test "attach"
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gdb_test_multiple "attach $pid" $test {
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-re "Attaching to program: .*, process $pid\r\n" {
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# Missing "$gdb_prompt $" is intentional.
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pass $test
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}
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}
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set test "error on Cannot access memory at address"
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gdb_test_multiple "" $test {
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-re "\r\nCannot access memory at address .*$gdb_prompt $" {
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fail $test
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}
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-re "$gdb_prompt $" {
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pass $test
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}
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}
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gdb_test "detach" "Detaching from program: .*"
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}}
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remote_exec host "kill -9 $pid"
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