https://sourceware.org/bugzilla/show_bug.cgi?id=21332
Bug ID: 21332
Summary: elflint doesn't handle compressed sections
Product: elfutils
Version: unspecified
Status: NEW
Severity: normal
Priority: P2
Component: tools
Assignee: unassigned at sourceware dot org
Reporter: rguenth at gcc dot gnu.org
CC: elfutils-devel at sourceware dot org
Target Milestone: ---
On s390x we see
[ 54s] FAIL: run-strip-strmerge.sh
[ 55s] FAIL: run-elflint-self.sh
[ 68s] # XFAIL: 0
[ 68s] # FAIL: 2
cat home/abuild/rpmbuild/BUILD/elfutils-0.168/tests/run-strip-strmerge.sh.log
elflint /home/abuild/rpmbuild/BUILD/elfutils-0.168/tests/elfstrmerge
No errors
elfstrmerge
elflint merged.elf
No errors
strip
elflint merged.elf.stripped
No errors
elflint merged.elf.debug
No errors
unstrip
elflint remerged.elf
No errors
elfcmp
elflint /home/abuild/rpmbuild/BUILD/elfutils-0.168/tests/elfstrmerge.o
section [28] '.symtab': symbol 109: st_value out of bounds
section [28] '.symtab': symbol 114: st_value out of bounds
..
FAIL run-strip-strmerge.sh (exit status: 1)
for example:
109: 0000000000000cc7 0 NOTYPE LOCAL DEFAULT 23 .LASF354
[23] .debug_str PROGBITS 0000000000000000 00003829
000000000000075a 0000000000000001 MSC 0 0 1
So it looks like this is an elflint bug which simply doesn't handle
compressed sections (C flag). Or handling it bogously and just on s390x...
The source does
if (! ebl_check_special_symbol (ebl, ehdr, sym, name,
destshdr))
{
if (st_value - sh_addr > destshdr->sh_size)
{
and check_special_symbol has no implementation in the s390 backend.
Probably not relevant, but destshdr->sh_size may not be the uncompressed
size here as it is accessed just via gelf_getshdr which doesn't seem to do
any uncompression.
On x86_64 I do not see the debug strings in .symtab for some reason,
the relocations are done via .debug_str + offset (R_X86_64_32) while
on s390x we have .LASF8 + 0 (R_390_32). Looks like a GNU as deficiency
on s390x to me though.
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