* [Bug default/27767] New: dwz: libxul.so.debug: Unknown DWARF DW_OP_xderef_type
@ 2021-04-22 11:35 mliska at suse dot cz
2021-08-06 1:33 ` [Bug default/27767] " lennordocdoc0921 at gmail dot com
` (4 more replies)
0 siblings, 5 replies; 6+ messages in thread
From: mliska at suse dot cz @ 2021-04-22 11:35 UTC (permalink / raw)
To: dwz
https://sourceware.org/bugzilla/show_bug.cgi?id=27767
Bug ID: 27767
Summary: dwz: libxul.so.debug: Unknown DWARF DW_OP_xderef_type
Product: dwz
Version: unspecified
Status: UNCONFIRMED
Severity: normal
Priority: P2
Component: default
Assignee: nobody at sourceware dot org
Reporter: mliska at suse dot cz
CC: dwz at sourceware dot org
Target Milestone: ---
Happens for MozillaFirefox:
$ wget /srv/www/htdocs/splichaleu/tmp/libxul.so.debug.zst
$ zstd -d libxul.so.debug.zst
$ ./dwz -l 100000000 -L 1000000000 libxul.so.debug
/home/marxin/Programming/dwz/dwz: libxul.so.debug: Unknown DWARF
DW_OP_xderef_type
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* [Bug default/27767] dwz: libxul.so.debug: Unknown DWARF DW_OP_xderef_type
2021-04-22 11:35 [Bug default/27767] New: dwz: libxul.so.debug: Unknown DWARF DW_OP_xderef_type mliska at suse dot cz
@ 2021-08-06 1:33 ` lennordocdoc0921 at gmail dot com
2023-01-13 8:36 ` mliska at suse dot cz
` (3 subsequent siblings)
4 siblings, 0 replies; 6+ messages in thread
From: lennordocdoc0921 at gmail dot com @ 2021-08-06 1:33 UTC (permalink / raw)
To: dwz
https://sourceware.org/bugzilla/show_bug.cgi?id=27767
Lennor <lennordocdoc0921 at gmail dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |lennordocdoc0921 at gmail dot com
--- Comment #1 from Lennor <lennordocdoc0921 at gmail dot com> ---
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* [Bug default/27767] dwz: libxul.so.debug: Unknown DWARF DW_OP_xderef_type
2021-04-22 11:35 [Bug default/27767] New: dwz: libxul.so.debug: Unknown DWARF DW_OP_xderef_type mliska at suse dot cz
2021-08-06 1:33 ` [Bug default/27767] " lennordocdoc0921 at gmail dot com
@ 2023-01-13 8:36 ` mliska at suse dot cz
2023-01-13 14:17 ` mark at klomp dot org
` (2 subsequent siblings)
4 siblings, 0 replies; 6+ messages in thread
From: mliska at suse dot cz @ 2023-01-13 8:36 UTC (permalink / raw)
To: dwz
https://sourceware.org/bugzilla/show_bug.cgi?id=27767
--- Comment #2 from Martin Liska <mliska at suse dot cz> ---
(In reply to Martin Liska from comment #0)
> Happens for MozillaFirefox:
>
> $ wget /srv/www/htdocs/splichaleu/tmp/libxul.so.debug.zst
Should be:
$ wget https://splichal.eu/tmp/libxul.so.debug.zst
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* [Bug default/27767] dwz: libxul.so.debug: Unknown DWARF DW_OP_xderef_type
2021-04-22 11:35 [Bug default/27767] New: dwz: libxul.so.debug: Unknown DWARF DW_OP_xderef_type mliska at suse dot cz
2021-08-06 1:33 ` [Bug default/27767] " lennordocdoc0921 at gmail dot com
2023-01-13 8:36 ` mliska at suse dot cz
@ 2023-01-13 14:17 ` mark at klomp dot org
2023-01-13 14:32 ` mark at klomp dot org
2023-01-16 10:14 ` mliska at suse dot cz
4 siblings, 0 replies; 6+ messages in thread
From: mark at klomp dot org @ 2023-01-13 14:17 UTC (permalink / raw)
To: dwz
https://sourceware.org/bugzilla/show_bug.cgi?id=27767
Mark Wielaard <mark at klomp dot org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Last reconfirmed| |2023-01-13
CC| |mark at klomp dot org
Ever confirmed|0 |1
Status|UNCONFIRMED |NEW
--- Comment #3 from Mark Wielaard <mark at klomp dot org> ---
Confirmed, newer dwz does give a more information in the error message:
./dwz: libxul.so.debug: Unknown DWARF DW_OP_xderef_type referenced from DIE at
[4ac96a5c]
dwz does indeed not handle DW_OP_xderef_type, which carries an extra address
space identifier. But I suspect this is corrupt DWARF, binutils readelf doesn't
like it:
readelf: ./libxul.so.debug: Warning: Bogus end-of-siblings marker detected at
offset 4ac96a6a in .debug_info section
readelf: ./libxul.so.debug: Warning: Bogus end-of-siblings marker detected at
offset 4ac96a6b in .debug_info section
readelf: ./libxul.so.debug: Warning: Bogus end-of-siblings marker detected at
offset 4ac96a6c in .debug_info section
Which is suspiciously close to to the identified DIE.
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* [Bug default/27767] dwz: libxul.so.debug: Unknown DWARF DW_OP_xderef_type
2021-04-22 11:35 [Bug default/27767] New: dwz: libxul.so.debug: Unknown DWARF DW_OP_xderef_type mliska at suse dot cz
` (2 preceding siblings ...)
2023-01-13 14:17 ` mark at klomp dot org
@ 2023-01-13 14:32 ` mark at klomp dot org
2023-01-16 10:14 ` mliska at suse dot cz
4 siblings, 0 replies; 6+ messages in thread
From: mark at klomp dot org @ 2023-01-13 14:32 UTC (permalink / raw)
To: dwz
https://sourceware.org/bugzilla/show_bug.cgi?id=27767
--- Comment #4 from Mark Wielaard <mark at klomp dot org> ---
This might be a bug in NASM because this is the bogus compile unit:
<0><4ac969e7>: Abbrev Number: 1 (DW_TAG_compile_unit)
<4ac969e8> DW_AT_low_pc : 0x4b17c00
<4ac969f0> DW_AT_high_pc : 0x4b1b9f7
<4ac969f8> DW_AT_stmt_list : 0x621f999
<4ac969fc> DW_AT_name :
/home/abuild/rpmbuild/BUILD/firefox-87.0/third_party/dav1d/src/x86/cdef_avx2.asm
<4ac96a4d> DW_AT_producer : NASM 2.15.05
<4ac96a5a> DW_AT_language : 32769 (MIPS assembler)
<1><4ac96a5c>: Abbrev Number: 2 (DW_TAG_subprogram)
<4ac96a5d> DW_AT_low_pc : 0x4b17c00
<4ac96a65> DW_AT_frame_base : 0x0 (location list)
<1><4ac96a69>: Abbrev Number: 0
<0><4ac96a6a>: Abbrev Number: 0
readelf: ./libxul.so.debug: Warning: Bogus end-of-siblings marker detected at
offset 4ac96a6a in .debug_info section
readelf: ./libxul.so.debug: Warning: Further warnings about bogus
end-of-sibling markers suppressed
<-1><4ac96a6b>: Abbrev Number: 0
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* [Bug default/27767] dwz: libxul.so.debug: Unknown DWARF DW_OP_xderef_type
2021-04-22 11:35 [Bug default/27767] New: dwz: libxul.so.debug: Unknown DWARF DW_OP_xderef_type mliska at suse dot cz
` (3 preceding siblings ...)
2023-01-13 14:32 ` mark at klomp dot org
@ 2023-01-16 10:14 ` mliska at suse dot cz
4 siblings, 0 replies; 6+ messages in thread
From: mliska at suse dot cz @ 2023-01-16 10:14 UTC (permalink / raw)
To: dwz
https://sourceware.org/bugzilla/show_bug.cgi?id=27767
Martin Liska <mliska at suse dot cz> changed:
What |Removed |Added
----------------------------------------------------------------------------
See Also| |https://sourceware.org/bugz
| |illa/show_bug.cgi?id=27588
--- Comment #5 from Martin Liska <mliska at suse dot cz> ---
Oh, again a corrupted NASM debug info, so related to PR27588.
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2021-04-22 11:35 [Bug default/27767] New: dwz: libxul.so.debug: Unknown DWARF DW_OP_xderef_type mliska at suse dot cz
2021-08-06 1:33 ` [Bug default/27767] " lennordocdoc0921 at gmail dot com
2023-01-13 8:36 ` mliska at suse dot cz
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