2010-07-05 Jan Kratochvil <jan.kratochvil@redhat.com>
+ Joel Brobecker <brobecker@adacore.com>
+
+ * gdb.base/attach-pie-misread.exp: Load prelink-support.exp. Replace
+ build_executable by build_executable_own_libs. Replace "prelink -R"
+ execution by a call of prelink_yes. Comment why "prelink -r" needs no
+ change.
+ * gdb.base/break-interp.exp: Load prelink-support.exp. Rename calls of
+ copy to file_copy. Move setting opts --dynamic-linker and -rpath,
+ mkdir $dir and ldd its parsing and copying to lib/prelink-support.exp.
+ Replace build_executable by build_executable_own_libs's function
+ build_executable_own_libs.
+ (prelinkNO): Create new stub to call prelink_no.
+ (prelinkYES): Create new stub to call prelink_yes.
+ (test_attach): Rename calls of copy to file_copy.
+ (section_get, prelinkNO_run, prelinkNO, prelinkYES, symlink_resolve)
+ (copy): Move to ...
+ * lib/prelink-support.exp: ... a new file. Rename prelinkNO to
+ prelink_no, prelinkYES to prelink_yes, copy to file_copy.
+ * gdb.base/prelink.exp: Disable testcase also for is_remote and
+ skip_shlib_tests. Load prelink-support.exp. Replace gdb_compile with
+ special flags by gdb_compile_shlib. Replace second gdb_compile by
+ build_executable_own_libs. Replace "prelink -R" execution by a call of
+ prelink_yes. Replace "prelink -u" and second "prelink -R" execution by
+ a second call of prelink_yes. Replace restart commands by
+ clean_restart.
+ (prelink): Rename to ...
+ (seen displacement message): ... this test. Extend its expectation
+ strictness.
+
+2010-07-05 Jan Kratochvil <jan.kratochvil@redhat.com>
* gdb.base/attach-pie-misread.exp, gdb.base/attach-pie-misread.c: New.
* gdb.base/break-interp.exp (reach, test_core, test_ld): Require each
continue
}
+load_lib prelink-support.exp
+
set test "attach-pie-misread"
set srcfile ${test}.c
set genfile ${objdir}/${subdir}/${test}-gen.h
set executable ${test}
set binfile ${objdir}/${subdir}/${executable}
-if {[build_executable ${test}.exp $executable $srcfile [list "additional_flags=-fPIE -pie"]] == -1} {
+if {[build_executable_own_libs ${test}.exp $executable $srcfile [list "additional_flags=-fPIE -pie"]] == ""} {
return -1
}
fail $test
}
-if {[build_executable ${test}.exp $executable $srcfile [list "additional_flags=-fPIE -pie -DGEN=\"$genfile\""]] == -1} {
+set prelink_args [build_executable_own_libs ${test}.exp $executable $srcfile [list "additional_flags=-fPIE -pie -DGEN=\"$genfile\""]]
+if {$prelink_args == ""} {
return -1
}
set phdr [read_phdr $binfile "readelf rebuilt with stub_size"]
set dynamic_vaddr_prelinkno [lindex $phdr 0]
-set command "exec /usr/sbin/prelink -q -N --no-exec-shield -R $binfile"
-verbose -log "command is $command"
-set result [catch $command output]
-verbose -log "result is $result"
-verbose -log "output is $output"
-
-set test "prelink -R"
-if {$result == 0 && $output == ""} {
- pass $test
-} elseif {$result == 1 && [regexp {^(couldn't execute "/usr/sbin/prelink[^\r\n]*": no such file or directory\n?)*$} $output]} {
- untested attach-pie-misread.exp
+if ![prelink_yes $prelink_args] {
return -1
-} else {
- fail $test
}
set phdr [read_phdr $binfile "readelf with prelink -R"]
set shifted_offset [format 0x%x [expr "$first_offset - $align_mult * $align_max"]]
verbose -log "shifted_offset is $shifted_offset"
+ # For normal prelink (prelink_yes call), we need to supply $prelink_args.
+ # For the prelink `-r' option below, $prelink_args is not required.
+ # Moreover, if it was used, the problem would not longer be reproducible
+ # as the libraries would also get relocated.
set command "exec /usr/sbin/prelink -q -N --no-exec-shield -r $shifted_offset $binfile"
verbose -log "command is $command"
set result [catch $command output]
continue
}
+load_lib prelink-support.exp
+
set test "break-interp"
set binprefix ${objdir}/${subdir}/${test}
# Only to get the $interp_system name.
return -1
}
-# Use -soname so that it is listed with " => " by ldd and this testcase makes
-# a copy of ${binfile_lib} for each prelink variant.
+# Use -soname so that the new library gets copied by build_executable_own_libs.
if {[gdb_compile_shlib ${srcdir}/${subdir}/${srcfile_lib} ${binfile_lib} [list debug additional_flags=-Wl,-soname,${test}.so]] != ""} {
return -1
return -1
}
-# Return the interpreter filename string.
-# Return "" if no interpreter was found.
-proc section_get {exec section} {
- global objdir
- global subdir
- set tmp "${objdir}/${subdir}/break-interp.interp"
- set objcopy_program [transform objcopy]
-
- set command "exec $objcopy_program -O binary --set-section-flags $section=A --change-section-address $section=0 -j $section $exec $tmp"
- verbose -log "command is $command"
- set result [catch $command output]
- verbose -log "result is $result"
- verbose -log "output is $output"
- if {$result == 1} {
- return ""
- }
- set fi [open $tmp]
- fconfigure $fi -translation binary
- set data [read $fi]
- close $fi
- #file delete $tmp
- # .interp has size $len + 1 but .gnu_debuglink contains garbage after \000.
- set len [string first \000 $data]
- if {$len < 0} {
- verbose -log "section $section not found"
- return ""
- }
- set retval [string range $data 0 [expr $len - 1]]
- verbose -log "section $section is <$retval>"
- return $retval
-}
-
# Note: The separate debug info file content build-id/crc32 are not verified
# contrary to the GDB search algorithm skipping non-matching ones.
proc system_debug_get {exec} {
set interp_system_debug [system_debug_get $interp_system]
verbose -log "$interp_system has debug $interp_system_debug"
-proc prelinkNO_run {arg} {
- set command "exec /usr/sbin/prelink -uN $arg"
- verbose -log "command is $command"
- set result [catch $command output]
- verbose -log "result is $result"
- verbose -log "output is $output"
- return [list $result $output]
-}
-
-proc prelinkNO {arg {name {}}} {
- if {$name == ""} {
- set name [file tail $arg]
- }
- set test "unprelink $name"
- set run [prelinkNO_run $arg]
- set result [lindex $run 0]
- set output [lindex $run 1]
- if {$result == 0 && $output == ""} {
- verbose -log "$name has been now unprelinked"
- set run [prelinkNO_run $arg]
- set result [lindex $run 0]
- set output [lindex $run 1]
- }
- # Last line does miss the trailing \n.
- if {$result == 1 && [regexp {^(/usr/sbin/prelink[^\r\n]*: [^ ]* does not have .gnu.prelink_undo section\n?)*$} $output]} {
- pass $test
- return 1
- } else {
- fail $test
- return 0
- }
+proc prelinkNO {arg {name ""}} {
+ return [prelink_no $arg $name]
}
proc prelinkYES {arg {name ""}} {
- if {$name == ""} {
- set name [file tail $arg]
- }
-
- # Try to unprelink it first so that if it has been already prelinked before
- # we get different address now and the result is not affected by the
- # previous $arg state..
- prelinkNO $arg "$name pre-unprelink"
-
- set test "prelink $name"
- set command "exec /usr/sbin/prelink -qNR --no-exec-shield $arg"
- verbose -log "command is $command"
- set result [catch $command output]
- verbose -log "result is $result"
- verbose -log "output is $output"
- if {$result == 0 && $output == ""} {
- pass $test
- return 1
- } elseif {$result == 1 \
- && [string match -nocase "*: Not enough room to add .dynamic entry" $output]} {
- # Linker should have reserved some entries for prelink.
- xfail $test
- return 0
- } else {
- fail $test
- return 0
- }
-}
-
-# Resolve symlinks.
-proc symlink_resolve {file} {
- set loop 0
- while {[file type $file] == "link"} {
- set target [file readlink $file]
- if {[file pathtype $target] == "relative"} {
- set src2 [file dirname $file]/$target
- } else {
- set src2 $target
- }
- verbose -log "Resolved symlink $file targetting $target as $src2"
- set file $src2
-
- set loop [expr $loop + 1]
- if {$loop > 30} {
- fail "Looping symlink resolution for $file"
- return ""
- }
- }
- return $file
-}
-
-proc copy {src dest} {
- set src [symlink_resolve $src]
- # Test name would contain build-id hash for symlink-unresolved $src.
- set test "copy [file tail $src] to [file tail $dest]"
- set command "file copy -force $src $dest"
- verbose -log "command is $command"
- if [catch $command] {
- fail $test
- return 0
- } else {
- pass $test
- return 1
- }
+ return [prelink_yes $arg $name]
}
proc strip_debug {dest} {
# Formerly this test was testing only prelinking of $EXEC. As the
# prelink command automatically prelinks all of $EXEC's libraries,
# even $INTERP got prelinked. Therefore, we formerly had to
- # `[copy $interp_saved $interp]' to make $INTERP not affected by
- # this prelinking of $EXEC.
+ # `[file_copy $interp_saved $interp]' to make $INTERP not affected
+ # by this prelinking of $EXEC.
#
# But now we need to test even prelinking of $INTERP. We could
# create a separate test to test just the $INTERP prelinking. For
test_attach_gdb $exec $pid $displacement "attach-relink$relink"
}
}
- copy $interp_saved $interp
+ file_copy $interp_saved $interp
}
remote_exec host "kill -9 $pid"
lappend pf_prefix "$ldname:"
if {$ldsepdebug == "NO"} {
- copy $interp_system $interp
+ file_copy $interp_system $interp
# Never call strip-debug before unprelink:
# prelink: ...: Section .note.gnu.build-id created after prelinking
if ![prelinkNO $interp] {
}
strip_debug $interp
} elseif {$ldsepdebug == "IN" && $interp_system_debug == ""} {
- copy $interp_system $interp
+ file_copy $interp_system $interp
} elseif {$ldsepdebug == "IN" && $interp_system_debug != ""} {
- copy $interp_system $interp
- copy $interp_system_debug "${interp}.debug"
+ file_copy $interp_system $interp
+ file_copy $interp_system_debug "${interp}.debug"
# eu-unstrip: DWARF data in '...' not adjusted for prelinking bias; consider prelink -u
if {![prelinkNO $interp] || ![prelinkNO "${interp}.debug"]} {
continue
pass $test
}
} elseif {$ldsepdebug == "SEP" && $interp_system_debug == ""} {
- copy $interp_system $interp
+ file_copy $interp_system $interp
# eu-unstrip: DWARF data in '...' not adjusted for prelinking bias; consider prelink -u
if ![prelinkNO $interp] {
continue
}
gdb_gnu_strip_debug $interp
} elseif {$ldsepdebug == "SEP" && $interp_system_debug != ""} {
- copy $interp_system $interp
- copy $interp_system_debug "${interp}.debug"
+ file_copy $interp_system $interp
+ file_copy $interp_system_debug "${interp}.debug"
}
if {$ldsepdebug == "SEP"} {
}
test_ld $interp 0 [expr {$ldsepdebug == "NO"}] $displacement
- if ![copy $interp $interp_saved] {
+ if ![file_copy $interp $interp_saved] {
continue
}
set old_binprefix $pf_prefix
set binname "BINprelink${binprelink}debug${binsepdebug}pie${binpie}"
set exec $binprefix-$binname
- set dir ${exec}.d
set pf_prefix $old_binprefix
lappend pf_prefix "$binname:"
- set opts "additional_flags=-Wl,--dynamic-linker,$interp,-rpath,$dir"
- lappend opts "additional_flags=-Wl,$binfile_lib,-rpath,[file dirname $binfile_lib]"
+ set opts "additional_flags=-Wl,$binfile_lib,-rpath,[file dirname $binfile_lib]"
if {$binsepdebug != "NO"} {
lappend opts {debug}
}
if {$binpie != "NO"} {
lappend opts {additional_flags=-fPIE -pie}
}
- if {[build_executable ${test}.exp [file tail $exec] $srcfile $opts] == -1} {
+
+ set dir ${exec}.d
+ set relink_args [build_executable_own_libs ${test}.exp [file tail $exec] $srcfile $opts $interp $dir]
+ if {$relink_args == ""} {
continue;
}
+
if {$binsepdebug == "SEP"} {
gdb_gnu_strip_debug $exec
}
- # Supply a self-sufficent directory $dir with the required
- # libraries. To make an executable properly prelinked all
- # its dependencies on libraries must be also prelinked. If
- # some of the system libraries is currently not prelinked
- # we have no right to prelink (modify it) at its current
- # system place.
-
- file delete -force $dir
- file mkdir $dir
-
- set command "ldd $exec"
- set test "ldd [file tail $exec]"
- set result [catch "exec $command" output]
- verbose -log "result of $command is $result"
- verbose -log "output of $command is $output"
- if {$result != 0 || $output == ""} {
- fail $test
- } else {
- pass $test
- }
-
- # gdb testsuite will put there also needless -lm.
- set test "$test output contains libc"
- set libc [regexp -all -inline -line {^.* => (/[^ ]+).*$} $output]
- if {[llength $libc] == 0} {
- fail $test
- } else {
- pass $test
- }
-
- set dests {}
- for {set i 1} {$i < [llength $libc]} {incr i 2} {
- set abspath [lindex $libc $i]
- set dest "$dir/[file tail $abspath]"
- copy $abspath $dest
- lappend dests $dest
- }
-
if {$binpie == "NO"} {
set displacement "NONE"
} elseif {$binprelink == "NO"} {
set displacement "ZERO"
}
- set relink_args "--dynamic-linker=$interp --ld-library-path=$dir $exec $interp [concat $dests]"
if {[prelink$binprelink $relink_args [file tail $exec]]
- && [copy $interp_saved $interp]} {
+ && [file_copy $interp_saved $interp]} {
if {$binpie != "ATTACH"} {
test_ld $exec 1 [expr {$binsepdebug == "NO"}] $displacement
} else {
}
-# are we on a target board
-if ![isnative] then {
+if { ![isnative] || [is_remote host] || [skip_shlib_tests]} {
return
}
return -1
}
+load_lib prelink-support.exp
+
set testfile "prelink"
set libsrcfile ${testfile}-lib.c
set libfile ${objdir}/${subdir}/${testfile}.so
-if { [gdb_compile "${srcdir}/${subdir}/${libsrcfile}" "${libfile}" executable [list debug "additional_flags=-fpic -shared -nodefaultlibs"]] != ""} {
+
+# Use -soname so that the new library gets copied by build_executable_own_libs.
+
+if { [gdb_compile_shlib "${srcdir}/${subdir}/${libsrcfile}" "${libfile}" [list debug "additional_flags=-Wl,-soname,[file tail ${libfile}]"]] != ""} {
# If creating the shared library fails, maybe we don't have the right tools
return -1
}
-# `--no-exec-shield' is for i386 where prelink in the exec-shield mode is
-# forced to push all the libraries tight together to fit into the first two
-# memory areas (either the ASCII Shield area or at least below the executable).
-# In this case its -R option cannot be applied and we falsely FAIL here as if
-# the system is already prelinked prelink has no choice how to randomize the
-# single new unprelinked library address without wasting the first one/two
-# memory areas. We do not care of the efficiency of loading such resulting
-# exec-shield unfriendly prelinked library.
-if {[catch "system \"prelink -qNR --no-exec-shield ${libfile}\""] != 0} {
- # Maybe we don't have prelink.
+set srcfile ${testfile}.c
+set executable ${testfile}t
+set binfile ${objdir}/${subdir}/${executable}
+set prelink_args [build_executable_own_libs ${testfile}.exp $executable $srcfile [list debug "additional_flags=-Wl,${libfile},-rpath,[file dirname ${libfile}]"]]
+if {$prelink_args == ""} {
return -1
}
-set srcfile ${testfile}.c
-set binfile ${objdir}/${subdir}/${testfile}t
-if { [gdb_compile "${srcdir}/${subdir}/${srcfile} ${libfile}" "${binfile}" executable [list debug "additional_flags=-Wl,-rpath,${objdir}/${subdir}"]] != ""} {
- return -1;
+if ![prelink_yes $prelink_args] {
+ # Maybe we don't have prelink.
+ return -1
}
set found 0
return 0
}
-if {[catch "system \"prelink -uN ${libfile}\""] != 0} {
- untested "${testfile}.so was not prelinked, maybe system libraries are not prelinked?"
- return 0
+# Relink $libfile to a different address.
+if ![prelink_yes $prelink_args] {
+ return -1
}
-catch "system \"prelink -qNR --no-exec-shield ${libfile}\""
# Start with a fresh gdb
-gdb_exit
-gdb_start
-gdb_reinitialize_dir $srcdir/$subdir
-gdb_load ${binfile}
+clean_restart $executable
# Print the "adjusting expectations" message.
gdb_test_no_output "set verbose on"
-gdb_test "core-file $objdir/$subdir/prelink.core" {Using PIC \(Position Independent Code\) prelink displacement.*} "prelink"
+gdb_test "core-file $objdir/$subdir/prelink.core" "Using PIC \\(Position Independent Code\\) prelink displacement 0x\[^0\]\[0-9a-f\]* for \[^\r\n\]*[file tail ${libfile}].*" "seen displacement message"
--- /dev/null
+# Copyright (C) 2010 Free Software Foundation, Inc.
+
+# This program is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation; either version 3 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program. If not, see <http://www.gnu.org/licenses/>.
+
+# Return nul-terminated string read from section SECTION of EXEC. Return ""
+# if no such section or nul-terminated string was found. Function is useful
+# for sections ".interp" or ".gnu_debuglink".
+
+proc section_get {exec section} {
+ global objdir
+ global subdir
+ set tmp "${objdir}/${subdir}/section_get.tmp"
+ set objcopy_program [transform objcopy]
+
+ set command "exec $objcopy_program -O binary --set-section-flags $section=A --change-section-address $section=0 -j $section $exec $tmp"
+ verbose -log "command is $command"
+ set result [catch $command output]
+ verbose -log "result is $result"
+ verbose -log "output is $output"
+ if {$result == 1} {
+ return ""
+ }
+ set fi [open $tmp]
+ fconfigure $fi -translation binary
+ set data [read $fi]
+ close $fi
+ file delete $tmp
+ # .interp has size $len + 1 but .gnu_debuglink contains garbage after \000.
+ set len [string first \000 $data]
+ if {$len < 0} {
+ verbose -log "section $section not found"
+ return ""
+ }
+ set retval [string range $data 0 [expr $len - 1]]
+ verbose -log "section $section is <$retval>"
+ return $retval
+}
+
+# Resolve symlinks.
+
+proc symlink_resolve {file} {
+ set loop 0
+ while {[file type $file] == "link"} {
+ set target [file readlink $file]
+ if {[file pathtype $target] == "relative"} {
+ set src2 [file dirname $file]/$target
+ } else {
+ set src2 $target
+ }
+ verbose -log "Resolved symlink $file targetting $target as $src2"
+ set file $src2
+
+ set loop [expr $loop + 1]
+ if {$loop > 30} {
+ fail "Looping symlink resolution for $file"
+ return ""
+ }
+ }
+ return $file
+}
+
+# Copy SRC to DEST, resolving any symlinks in SRC. Return nonzero iff
+# the copy was succesful.
+#
+# This function is guaranteed to never raise any exception, even when the copy
+# fails.
+
+proc file_copy {src dest} {
+ set src [symlink_resolve $src]
+ # Test name would contain unstable directory name for symlink-unresolved
+ # $src.
+ set test "copy [file tail $src] to [file tail $dest]"
+ set command "file copy -force -- $src $dest"
+ verbose -log "command is $command"
+ if [catch $command] {
+ fail $test
+ return 0
+ } else {
+ pass $test
+ return 1
+ }
+}
+
+# Wrap function build_executable so that the resulting executable is fully
+# self-sufficient (without dependencies on system libraries). Parameter
+# INTERP may be used to specify a loader (ld.so) to be used that is
+# different from the default system one. Libraries on which the executable
+# depends are copied into directory DIR. Default DIR value to
+# `${objdir}/${subdir}/${EXECUTABLE}.d'.
+#
+# In case of success, return a string containing the arguments to be used
+# in order to perform a prelink of the executable obtained. Return the
+# empty string in case of failure.
+#
+# This can be useful when trying to prelink an executable which might
+# depend on system libraries. To properly prelink an executable, all
+# of its dynamically linked libraries must be prelinked as well. If
+# the executable depends on some system libraries, we may not have
+# sufficient write priviledges on these files to perform the prelink.
+# This is why we make a copy of these shared libraries, and link the
+# executable against these copies instead.
+#
+# Function recognizes only libraries listed by `ldd' after
+# its ` => ' separator. That means $INTERP and any libraries not being linked
+# with -Wl,-soname,NAME.so are not copied.
+
+proc build_executable_own_libs {testname executable sources options {interp ""} {dir ""}} {
+ global objdir subdir
+
+ if {[build_executable $testname $executable $sources $options] == -1} {
+ return ""
+ }
+ set binfile ${objdir}/${subdir}/${executable}
+
+ set command "ldd $binfile"
+ set test "ldd $executable"
+ set result [catch "exec $command" output]
+ verbose -log "result of $command is $result"
+ verbose -log "output of $command is $output"
+ if {$result != 0 || $output == ""} {
+ fail $test
+ } else {
+ pass $test
+ }
+
+ # gdb testsuite will put there also needless -lm.
+ set test "$test output contains libs"
+ set libs [regexp -all -inline -line {^.* => (/[^ ]+).*$} $output]
+ if {[llength $libs] == 0} {
+ fail $test
+ } else {
+ pass $test
+ }
+
+ if {$dir == ""} {
+ set dir ${binfile}.d
+ }
+ file delete -force -- $dir
+ file mkdir $dir
+
+ if {$interp == ""} {
+ set interp_system [section_get $binfile .interp]
+ set interp ${dir}/[file tail $interp_system]
+ file_copy $interp_system $interp
+ }
+
+ set dests {}
+ foreach {trash abspath} $libs {
+ set dest "$dir/[file tail $abspath]"
+ file_copy $abspath $dest
+ lappend dests $dest
+ }
+
+ # Do not lappend it so that "-rpath $dir" overrides any possible "-rpath"s
+ # specified by the caller to be able to link it for ldd" above.
+ set options [linsert $options 0 "additional_flags=-Wl,--dynamic-linker,$interp,-rpath,$dir"]
+
+ if {[build_executable $testname $executable $sources $options] == -1} {
+ return ""
+ }
+
+ set prelink_args "--dynamic-linker=$interp --ld-library-path=$dir $binfile $interp [concat $dests]"
+ return $prelink_args
+}
+
+# Unprelink ARG. Reported test name can be specified by NAME. Return non-zero
+# on success, zero on failure.
+
+proc prelink_no {arg {name {}}} {
+ if {$name == ""} {
+ set name [file tail $arg]
+ }
+ set test "unprelink $name"
+ set command "exec /usr/sbin/prelink -uN $arg"
+ verbose -log "command is $command"
+ set result [catch $command output]
+ verbose -log "result is $result"
+ verbose -log "output is $output"
+ if {$result == 0 && $output == ""} {
+ verbose -log "$name has been now unprelinked"
+ set command "exec /usr/sbin/prelink -uN $arg"
+ verbose -log "command is $command"
+ set result [catch $command output]
+ verbose -log "result is $result"
+ verbose -log "output is $output"
+ }
+ # Last line does miss the trailing \n. There can be multiple such messages
+ # as ARG may list multiple files.
+ if {$result == 1 && [regexp {^(/usr/sbin/prelink[^\r\n]*: [^ ]* does not have .gnu.prelink_undo section\n?)*$} $output]} {
+ pass $test
+ return 1
+ } else {
+ fail $test
+ return 0
+ }
+}
+
+# Prelink ARG. Reported test name can be specified by NAME. Return non-zero
+# on success, zero on failure.
+
+proc prelink_yes {arg {name ""}} {
+ if {$name == ""} {
+ set name [file tail $arg]
+ }
+
+ # Try to unprelink it first so that, if it has been already prelinked
+ # before, we get a different address now, making the new result unaffected
+ # by any previous prelinking.
+ prelink_no $arg "$name pre-unprelink"
+
+ set test "prelink $name"
+
+ # `--no-exec-shield' is for i386, where prelink in the exec-shield mode is
+ # forced to push all the libraries tight together, in order to fit into
+ # the first two memory areas (either the ASCII Shield area or at least
+ # below the executable). If the prelink was performed in exec-shield
+ # mode, prelink could have no choice on how to randomize the single new
+ # unprelinked library address without wasting space in the first one/two
+ # memory areas. In such case prelink could place $ARG repeatedly at the
+ # same place and we could have false prelink results on
+ # gdb.base/prelink.exp and others. To prevent this from happening, we use
+ # the --no-exec-shield switch. This may have some consequences in terms
+ # of security, but we do not care in our case.
+
+ set command "exec /usr/sbin/prelink -qNR --no-exec-shield $arg"
+
+ verbose -log "command is $command"
+ set result [catch $command output]
+ verbose -log "result is $result"
+ verbose -log "output is $output"
+ if {$result == 0 && $output == ""} {
+ pass $test
+ return 1
+ } elseif {$result == 1 \
+ && [string match -nocase "*: Not enough room to add .dynamic entry" $output]} {
+ # Linker should have reserved some entries for prelink.
+ xfail $test
+ return 0
+ } else {
+ fail $test
+ return 0
+ }
+}
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