From: Peilin Ye <yepeilin.cs@gmail.com>
To: Alan Modra <amodra@gmail.com>
Cc: binutils@sourceware.org, Cong Wang <xiyou.wangcong@gmail.com>,
Peilin Ye <peilin.ye@bytedance.com>,
Nick Clifton <nickc@redhat.com>,
Peilin Ye <yepeilin.cs@gmail.com>
Subject: Re: [RFC PATCH] bfd: Handle objcopy --only-keep-debug in _bfd_elf_init_private_section_data()
Date: Sat, 29 Jan 2022 01:15:40 -0800 [thread overview]
Message-ID: <20220129091540.GA68164@bytedance> (raw)
In-Reply-To: <YfPnFLgWeZECe6Tt@squeak.grove.modra.org>
Hi Alan,
On Fri, Jan 28, 2022 at 11:22:36PM +1030, Alan Modra wrote:
> Do you have a testcase we could add to the binutils testsuite?
I just added a check [1] to
objcopy.exp:keep_debug_symbols_and_test_copy(), but unfortunately it is
not testing anything:
It seems that --only-keep-debug is broken for Linux kernel .ko modules,
but it works just fine on tmpdir/striprog (built from testprog.c) used
by this testsuite...
I will take another look tomorrow and try to figure out what is so
special about Linux modules, then come up with a better test. Maybe we
should also mention this in the commit message of the fix.
Thanks,
Peilin Ye
<peilin.ye@bytedance.com>
[1]
diff --git a/binutils/testsuite/binutils-all/objcopy.exp b/binutils/testsuite/binutils-all/objcopy.exp
index bb80c1f0b554..1ad90a776c48 100644
--- a/binutils/testsuite/binutils-all/objcopy.exp
+++ b/binutils/testsuite/binutils-all/objcopy.exp
@@ -890,6 +890,8 @@ proc strip_executable_with_saving_a_symbol { prog flags test1 test2 } {
# Test keeping only debug symbols of an executable
proc keep_debug_symbols_and_test_copy { prog1 flags1 test1 prog2 flags2 test2 } {
+ global READELF
+
remote_file build delete tmpdir/striprog
remote_download build tmpdir/copyprog tmpdir/striprog
if [is_remote host] {
@@ -898,12 +900,45 @@ proc keep_debug_symbols_and_test_copy { prog1 flags1 test1 prog2 flags2 test2 }
set copyfile tmpdir/striprog
}
+ set non_debug_sections {}
+ if [is_elf_format] {
+ set got [binutils_run $READELF "-S --wide ${copyfile}"]
+ while {[regexp \
+ {[^a-zA-Z]+([a-zA-Z0-9_\.]+)[ \t]+([A-Z]+)[ \t]+[0-9a-f]+ [0-9a-f]+ [0-9a-f]+ [0-9]+[ \t]+([A-Z]*)[ \t]+[0-9]+(.*)} \
+ $got all name type flag rest]} {
+ if {$type != "NOTE" && [regexp {[AG]} $flag]} {
+ lappend non_debug_sections $name
+ }
+ set got $rest
+ }
+ }
+
set exec_output [binutils_run $prog1 "$flags1 ${copyfile}"]
if ![string equal "" $exec_output] {
fail $test1
return
}
- pass $test1
+
+ set fails 0
+ if [is_elf_format] {
+ set got [binutils_run $READELF "-S --wide ${copyfile}"]
+ while {[regexp \
+ {[^a-zA-Z]+([a-zA-Z0-9_\.]+)[ \t]+([A-Z]+)[ \t]+[0-9a-f]+ [0-9a-f]+ [0-9a-f]+ [0-9]+[ \t]+[A-Z]*[ \t]+[0-9]+(.*)} \
+ $got all name type rest]} {
+ if {[lsearch -exact $non_debug_sections $name] >= 0 && $type != "NOBITS"} {
+ set fails 1
+ send_log "Expected SHT_NOBITS type for .$name\n"
+ }
+ set got $rest
+ }
+ }
+
+ if {$fails == 0} {
+ pass $test1
+ } else {
+ fail $test1
+ return
+ }
set exec_output [binutils_run $prog2 "$flags2 ${copyfile}"]
if ![string equal "" $exec_output] {
next prev parent reply other threads:[~2022-01-29 9:15 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-01-28 3:58 Peilin Ye
2022-01-28 12:42 ` Nick Clifton
2022-01-28 12:52 ` Alan Modra
2022-01-28 23:37 ` Peilin Ye
2022-01-29 9:15 ` Peilin Ye [this message]
2022-01-30 1:08 ` Peilin Ye
2022-01-28 23:00 ` [PATCH v2] objcopy: Fix --only-keep-debug Peilin Ye
2022-02-01 0:20 ` [PATCH v3 1/2] objcopy: Fix --only-keep-debug for ELF relocatables Peilin Ye
2022-02-01 0:21 ` [PATCH v3 2/2] binutils/testsuite: Test " Peilin Ye
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