* [Bug tools/28488] New: phdr[6]: unknown object file note type 32 with owner name '' at offset 48
@ 2021-10-22 11:12 mliska at suse dot cz
2021-10-22 11:12 ` [Bug tools/28488] " mliska at suse dot cz
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From: mliska at suse dot cz @ 2021-10-22 11:12 UTC (permalink / raw)
To: elfutils-devel
https://sourceware.org/bugzilla/show_bug.cgi?id=28488
Bug ID: 28488
Summary: phdr[6]: unknown object file note type 32 with owner
name '' at offset 48
Product: elfutils
Version: unspecified
Status: UNCONFIRMED
Severity: normal
Priority: P2
Component: tools
Assignee: unassigned at sourceware dot org
Reporter: mliska at suse dot cz
CC: elfutils-devel at sourceware dot org
Target Milestone: ---
Noticed that when using ld.gold:
$ /home/marxin/Programming/elfutils/src/elflint --quiet --gnu-ld addr2line
phdr[6]: unknown object file note type 32 with owner name '' at offset 48
phdr[6]: extra 72 bytes after last note
$ readelf -n addr2line
...
Displaying notes found in: .note.gnu.gold-version
Owner Data size Description
GNU 0x00000009 NT_GNU_GOLD_VERSION (gold version)
Version: gold 1.16
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* [Bug tools/28488] phdr[6]: unknown object file note type 32 with owner name '' at offset 48
2021-10-22 11:12 [Bug tools/28488] New: phdr[6]: unknown object file note type 32 with owner name '' at offset 48 mliska at suse dot cz
@ 2021-10-22 11:12 ` mliska at suse dot cz
2021-10-22 12:29 ` mark at klomp dot org
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From: mliska at suse dot cz @ 2021-10-22 11:12 UTC (permalink / raw)
To: elfutils-devel
https://sourceware.org/bugzilla/show_bug.cgi?id=28488
Martin Liska <mliska at suse dot cz> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |mjw at fedoraproject dot org
--- Comment #1 from Martin Liska <mliska at suse dot cz> ---
@Mark: Can you please add a BuildBot builder that would use ld.gold?
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* [Bug tools/28488] phdr[6]: unknown object file note type 32 with owner name '' at offset 48
2021-10-22 11:12 [Bug tools/28488] New: phdr[6]: unknown object file note type 32 with owner name '' at offset 48 mliska at suse dot cz
2021-10-22 11:12 ` [Bug tools/28488] " mliska at suse dot cz
@ 2021-10-22 12:29 ` mark at klomp dot org
2021-10-22 12:35 ` mliska at suse dot cz
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From: mark at klomp dot org @ 2021-10-22 12:29 UTC (permalink / raw)
To: elfutils-devel
https://sourceware.org/bugzilla/show_bug.cgi?id=28488
Mark Wielaard <mark at klomp dot org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC|mjw at fedoraproject dot org |mark at klomp dot org
--- Comment #2 from Mark Wielaard <mark at klomp dot org> ---
Could you show the program and section headers, or attach the object file that
should the error? Even when I build with ld.gold there is no bad phdr according
to eu-elflint.
How exactly did you configure/build?
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* [Bug tools/28488] phdr[6]: unknown object file note type 32 with owner name '' at offset 48
2021-10-22 11:12 [Bug tools/28488] New: phdr[6]: unknown object file note type 32 with owner name '' at offset 48 mliska at suse dot cz
2021-10-22 11:12 ` [Bug tools/28488] " mliska at suse dot cz
2021-10-22 12:29 ` mark at klomp dot org
@ 2021-10-22 12:35 ` mliska at suse dot cz
2021-10-22 12:36 ` mliska at suse dot cz
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From: mliska at suse dot cz @ 2021-10-22 12:35 UTC (permalink / raw)
To: elfutils-devel
https://sourceware.org/bugzilla/show_bug.cgi?id=28488
--- Comment #3 from Martin Liska <mliska at suse dot cz> ---
F="-O2 -g -Wall -fuse-ld=gold" && export CFLAGS="$F" && export CXXFLAGS="$F" &&
export LDFLAGS="$F" && ./configure --enable-maintainer-mode
make && make check
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* [Bug tools/28488] phdr[6]: unknown object file note type 32 with owner name '' at offset 48
2021-10-22 11:12 [Bug tools/28488] New: phdr[6]: unknown object file note type 32 with owner name '' at offset 48 mliska at suse dot cz
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From: mliska at suse dot cz @ 2021-10-22 12:36 UTC (permalink / raw)
To: elfutils-devel
https://sourceware.org/bugzilla/show_bug.cgi?id=28488
--- Comment #4 from Martin Liska <mliska at suse dot cz> ---
$ wget https://splichal.eu/tmp/addr2line
$ ./elflint --quiet --gnu-ld addr2line
phdr[6]: unknown object file note type 32 with owner name '' at offset 48
phdr[6]: extra 72 bytes after last note
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* [Bug tools/28488] phdr[6]: unknown object file note type 32 with owner name '' at offset 48
2021-10-22 11:12 [Bug tools/28488] New: phdr[6]: unknown object file note type 32 with owner name '' at offset 48 mliska at suse dot cz
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From: mliska at suse dot cz @ 2021-10-22 13:52 UTC (permalink / raw)
To: elfutils-devel
https://sourceware.org/bugzilla/show_bug.cgi?id=28488
--- Comment #5 from Martin Liska <mliska at suse dot cz> ---
Minimal reproducer:
$ echo 'main() { return 0; }' | gcc -x c - -fuse-ld=gold && ./elflint --gnu-ld
a.out
<stdin>:1:1: warning: return type defaults to ‘int’ [-Wimplicit-int]
phdr[6]: unknown object file note type 32 with owner name '' at offset 48
phdr[6]: extra 72 bytes after last note
$ ld.gold --version
GNU gold (GNU Binutils; openSUSE Tumbleweed 2.37.20210803-1) 1.16
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* [Bug tools/28488] phdr[6]: unknown object file note type 32 with owner name '' at offset 48
2021-10-22 11:12 [Bug tools/28488] New: phdr[6]: unknown object file note type 32 with owner name '' at offset 48 mliska at suse dot cz
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From: mark at klomp dot org @ 2021-10-22 14:03 UTC (permalink / raw)
To: elfutils-devel
https://sourceware.org/bugzilla/show_bug.cgi?id=28488
--- Comment #6 from Mark Wielaard <mark at klomp dot org> ---
So with on fedora 34, x86_64:
gcc (GCC) 11.2.1 20210728 (Red Hat 11.2.1-1)
GNU gold (version 2.35.2-6.fc34) 1.16
eu-elflint (elfutils) 0.185
$ echo 'int main() { return 0; }' | gcc -x c - -fuse-ld=gold && eu-elflint
--gnu-ld ./a.out
No errors
$ eu-readelf -l a.out
Program Headers:
Type Offset VirtAddr PhysAddr FileSiz MemSiz
Flg Align
PHDR 0x000040 0x0000000000400040 0x0000000000400040 0x0001f8
0x0001f8 R 0x8
INTERP 0x000238 0x0000000000400238 0x0000000000400238 0x00001c
0x00001c R 0x1
[Requesting program interpreter: /lib64/ld-linux-x86-64.so.2]
LOAD 0x000000 0x0000000000400000 0x0000000000400000 0x0006d8
0x0006d8 R E 0x1000
LOAD 0x000e28 0x0000000000401e28 0x0000000000401e28 0x0001e0
0x0001e1 RW 0x1000
DYNAMIC 0x000e38 0x0000000000401e38 0x0000000000401e38 0x0001a0
0x0001a0 RW 0x8
NOTE 0x000254 0x0000000000400254 0x0000000000400254 0x000064
0x000064 R 0x4
GNU_EH_FRAME 0x0006a4 0x00000000004006a4 0x00000000004006a4 0x000034
0x000034 R 0x4
GNU_STACK 0x000000 0x0000000000000000 0x0000000000000000 0x000000
0x000000 RW 0x10
GNU_RELRO 0x000e28 0x0000000000401e28 0x0000000000401e28 0x0001d8
0x0001d8 RW 0x8
Section to Segment mapping:
Segment Sections...
00
01 [RO: .interp]
02 [RO: .interp .note.ABI-tag .note.gnu.property .note.gnu.build-id
.dynsym .dynstr .gnu.hash .gnu.version .gnu.version_r .rela.dyn .init .text
.fini .rodata .eh_frame .eh_frame_hdr]
03 [RELRO: .fini_array .init_array .dynamic .got .got.plt] .data .bss
04 [RELRO: .dynamic]
05 [RO: .note.ABI-tag .note.gnu.property .note.gnu.build-id]
06 [RO: .eh_frame_hdr]
07
08 [RELRO: .fini_array .init_array .dynamic .got .got.plt]
Note that there is only PT_NOTE segment and it doesn't cover the gold-version
note section because it isn't an allocated note section:
$ eu-readelf -S ./a.out | grep note
[ 2] .note.ABI-tag NOTE 0000000000400254 00000254 00000020 0 A
0 0 4
[ 3] .note.gnu.property NOTE 0000000000400274 00000274 00000020 0 A
0 0 4
[ 4] .note.gnu.build-id NOTE 0000000000400294 00000294 00000024 0 A
0 0 4
[27] .note.gnu.gold-version NOTE 0000000000000000 000029e0 0000001c 0
0 0 4
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* [Bug tools/28488] phdr[6]: unknown object file note type 32 with owner name '' at offset 48
2021-10-22 11:12 [Bug tools/28488] New: phdr[6]: unknown object file note type 32 with owner name '' at offset 48 mliska at suse dot cz
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From: mark at klomp dot org @ 2021-10-22 14:08 UTC (permalink / raw)
To: elfutils-devel
https://sourceware.org/bugzilla/show_bug.cgi?id=28488
--- Comment #7 from Mark Wielaard <mark at klomp dot org> ---
The addr2line binary from comment #4 has two phdr NOTE segments:
$ eu-elflint --quiet --gnu-ld addr2line
phdr[6]: unknown object file note type 32 with owner name '' at offset 48
phdr[6]: extra 72 bytes after last note
$ eu-readelf -l addr2line
Program Headers:
Type Offset VirtAddr PhysAddr FileSiz MemSiz
Flg Align
PHDR 0x000040 0x0000000000400040 0x0000000000400040 0x000230
0x000230 R 0x8
INTERP 0x000270 0x0000000000400270 0x0000000000400270 0x00001c
0x00001c R 0x1
[Requesting program interpreter: /lib64/ld-linux-x86-64.so.2]
LOAD 0x000000 0x0000000000400000 0x0000000000400000 0x0044d0
0x0044d0 R E 0x1000
LOAD 0x004da8 0x0000000000405da8 0x0000000000405da8 0x000478
0x000530 RW 0x1000
DYNAMIC 0x004db8 0x0000000000405db8 0x0000000000405db8 0x000210
0x000210 RW 0x8
NOTE 0x0002b0 0x00000000004002b0 0x00000000004002b0 0x000030
0x000030 R 0x8
NOTE 0x00028c 0x000000000040028c 0x000000000040028c 0x000078
0x000078 R 0x4
GNU_EH_FRAME 0x00445c 0x000000000040445c 0x000000000040445c 0x000074
0x000074 R 0x4
GNU_STACK 0x000000 0x0000000000000000 0x0000000000000000 0x000000
0x000000 RW 0x10
GNU_RELRO 0x004da8 0x0000000000405da8 0x0000000000405da8 0x000258
0x000258 RW 0x8
Section to Segment mapping:
Segment Sections...
00
01 [RO: .interp]
02 [RO: .interp .note.ABI-tag .note.gnu.property .note.gnu.build-id
.dynsym .dynstr .gnu.hash .hash .gnu.version .gnu.version_r .rela.dyn .rela.plt
.init .plt .text .fini .rodata .eh_frame .eh_frame_hdr]
03 [RELRO: .fini_array .init_array .dynamic .got] <RELRO: .got.plt>
.data .bss
04 [RELRO: .dynamic]
05 [RO: .note.gnu.property]
06 [RO: .note.ABI-tag .note.gnu.property .note.gnu.build-id]
07 [RO: .eh_frame_hdr]
08
09 [RELRO: .fini_array .init_array .dynamic .got]
There are two phdr PT_NOTE segments because they have different alignments (05
has alignment 8 and covers .note.gnu.property, 06 has alignment 8 and covers
the other loaded note sections)
$ eu-readelf -S addr2line | grep note
[ 2] .note.ABI-tag NOTE 000000000040028c 0000028c 00000020 0 A
0 0 4
[ 3] .note.gnu.property NOTE 00000000004002b0 000002b0 00000030 0 A
0 0 8
[ 4] .note.gnu.build-id NOTE 00000000004002e0 000002e0 00000024 0 A
0 0 4
[37] .note.gnu.gold-version NOTE 0000000000000000 00010a98 0000001c 0
0 0 4
Neither covers the gold-version (as expected)
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* [Bug tools/28488] phdr[6]: unknown object file note type 32 with owner name '' at offset 48
2021-10-22 11:12 [Bug tools/28488] New: phdr[6]: unknown object file note type 32 with owner name '' at offset 48 mliska at suse dot cz
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From: mliska at suse dot cz @ 2021-10-22 14:16 UTC (permalink / raw)
To: elfutils-devel
https://sourceware.org/bugzilla/show_bug.cgi?id=28488
--- Comment #8 from Martin Liska <mliska at suse dot cz> ---
> There are two phdr PT_NOTE segments because they have different alignments
> (05 has alignment 8 and covers .note.gnu.property, 06 has alignment 8
06 has alignment 0x4, right?
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* [Bug tools/28488] phdr[6]: unknown object file note type 32 with owner name '' at offset 48
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From: mark at klomp dot org @ 2021-10-22 14:19 UTC (permalink / raw)
To: elfutils-devel
https://sourceware.org/bugzilla/show_bug.cgi?id=28488
--- Comment #9 from Mark Wielaard <mark at klomp dot org> ---
So the real difference is that with the Fedora the .note.gnu.property has
alignment 4 and so it gets merged with the other (allocated) note sections. But
the opensuse version .note.gnu.property has alignment 8 and ends up in its own
phdr NOTE segment.
I don't know whether this is buggy or if eu-elflint just gets confused about
it.
Creating NOTEs with an alignment of 8 was controversial since at least on GNU
systems all other NOTEs have alignment 4 whether or not using ELFCLASS32 or
ELFCLASS64.
Handling of gnu property notes was added with:
commit 5199e15870e05e5b0b9f98c20fc9b5427aa6dd6a
Author: Mark Wielaard <mark@klomp.org>
Date: Mon Oct 15 23:35:47 2018 +0200
Recognize and parse GNU Property notes.
GNU Property notes are different from normal notes because they use
variable alignment/padding of their fields. They are 8 byte aligned,
but use 4 byte fields. The name is aligned at 4 bytes and padded so
that, the desc is aligned at 8 bytes. The whole note is padded to
8 bytes again. For normal notes all fields are both 4 bytes wide and
4 bytes aligned.
To recognize these new kind of ELF Notes a new Elf_Type is introduced,
ELF_T_NHDR8. This type is used in the xlate functions to determine
how to align and pad the various fields. Since the fields themselves
can now have different alignments we will have to keep track of the
current alignement and use either NOTE_ALIGN4 or NOTE_ALIGN8 to
determine the padding.
To set the correct Elf_Type on the Elf_Data we use either the section
sh_addralign or the segment p_align values. Assuming 8 means the
section or segment contains the new style notes, otherwise normal
notes.
When we cannot determine the "alignment" directly, like when parsing
special kernel sys files, we check the name "GNU" and type
"GNU_PROPERTY_TYPE_0" fields.
ebl_object_note now parses the new NT_GNU_PROPERTY_TYPE_0 and can
extract the GNU_PROPERTY_STACK_SIZE, GNU_PROPERTY_NO_COPY_ON_PROTECTED
and GNU_PROPERTY_X86_FEATURE_1_AND types GNU_PROPERTY_X86_FEATURE_1_IBT
and GNU_PROPERTY_X86_FEATURE_1_SHSTK.
Tests are added for extracting the note from sections or segments
as set by gcc -fcf-protection.
Signed-off-by: Mark Wielaard <mark@klomp.org>
Another maybe (or maybe not) related bug:
"unknown program header entry type 0x6474e553 (PT_GNU_PROPERTY)"
https://sourceware.org/bugzilla/show_bug.cgi?id=25511
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* [Bug tools/28488] phdr[6]: unknown object file note type 32 with owner name '' at offset 48
2021-10-22 11:12 [Bug tools/28488] New: phdr[6]: unknown object file note type 32 with owner name '' at offset 48 mliska at suse dot cz
` (8 preceding siblings ...)
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From: mark at klomp dot org @ 2021-10-22 14:22 UTC (permalink / raw)
To: elfutils-devel
https://sourceware.org/bugzilla/show_bug.cgi?id=28488
--- Comment #10 from Mark Wielaard <mark at klomp dot org> ---
(In reply to Martin Liska from comment #8)
> > There are two phdr PT_NOTE segments because they have different alignments
> > (05 has alignment 8 and covers .note.gnu.property, 06 has alignment 8
>
> 06 has alignment 0x4, right?
yes, sorry.
PT_NOTE segment 05 has alignment 0x8 and covers .note.gnu.property
PT_NOTE segment 06 has alignment 0x4 and covers the other loadable note
sections
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* [Bug tools/28488] phdr[6]: unknown object file note type 32 with owner name '' at offset 48
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From: mliska at suse dot cz @ 2021-10-22 14:23 UTC (permalink / raw)
To: elfutils-devel
https://sourceware.org/bugzilla/show_bug.cgi?id=28488
--- Comment #11 from Martin Liska <mliska at suse dot cz> ---
(In reply to Mark Wielaard from comment #9)
> So the real difference is that with the Fedora the .note.gnu.property has
> alignment 4 and so it gets merged with the other (allocated) note sections.
> But the opensuse version .note.gnu.property has alignment 8 and ends up in
> its own phdr NOTE segment.
I see. Is it the linker of the assembler which decides the note alignment?
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* [Bug tools/28488] phdr[6]: unknown object file note type 32 with owner name '' at offset 48
2021-10-22 11:12 [Bug tools/28488] New: phdr[6]: unknown object file note type 32 with owner name '' at offset 48 mliska at suse dot cz
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From: mliska at suse dot cz @ 2021-10-22 14:24 UTC (permalink / raw)
To: elfutils-devel
https://sourceware.org/bugzilla/show_bug.cgi?id=28488
--- Comment #12 from Martin Liska <mliska at suse dot cz> ---
(In reply to Martin Liska from comment #11)
> (In reply to Mark Wielaard from comment #9)
> > So the real difference is that with the Fedora the .note.gnu.property has
> > alignment 4 and so it gets merged with the other (allocated) note sections.
> > But the opensuse version .note.gnu.property has alignment 8 and ends up in
> > its own phdr NOTE segment.
>
> I see. Is it the linker of the assembler which decides the note alignment?
Apparently, the assembler:
echo '' | as --64 -o empty.o && readelf -SW empty.o
There are 6 section headers, starting at offset 0xa0:
Section Headers:
[Nr] Name Type Address Off Size ES Flg
Lk Inf Al
[ 0] NULL 0000000000000000 000000 000000 00
0 0 0
[ 1] .text PROGBITS 0000000000000000 000040 000000 00 AX
0 0 1
[ 2] .data PROGBITS 0000000000000000 000040 000000 00 WA
0 0 1
[ 3] .bss NOBITS 0000000000000000 000040 000000 00 WA
0 0 1
[ 4] .note.gnu.property NOTE 0000000000000000 000040 000030 00 A
0 0 8
[ 5] .shstrtab STRTAB 0000000000000000 000070 00002f 00
0 0 1
Key to Flags:
W (write), A (alloc), X (execute), M (merge), S (strings), I (info),
L (link order), O (extra OS processing required), G (group), T (TLS),
C (compressed), x (unknown), o (OS specific), E (exclude),
D (mbind), l (large), p (processor specific)
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* [Bug tools/28488] phdr[6]: unknown object file note type 32 with owner name '' at offset 48
2021-10-22 11:12 [Bug tools/28488] New: phdr[6]: unknown object file note type 32 with owner name '' at offset 48 mliska at suse dot cz
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From: mliska at suse dot cz @ 2021-10-22 14:29 UTC (permalink / raw)
To: elfutils-devel
https://sourceware.org/bugzilla/show_bug.cgi?id=28488
--- Comment #13 from Martin Liska <mliska at suse dot cz> ---
Note
https://github.com/bminor/binutils-gdb/blob/master/gas/config/tc-i386.c#L9083
shows that alignment should be equal to 8 for ELFCLASS64.
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* [Bug tools/28488] phdr[6]: unknown object file note type 32 with owner name '' at offset 48
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From: mliska at suse dot cz @ 2021-10-22 14:30 UTC (permalink / raw)
To: elfutils-devel
https://sourceware.org/bugzilla/show_bug.cgi?id=28488
--- Comment #14 from Martin Liska <mliska at suse dot cz> ---
Mark, what do you see for:
$ echo '' | as --64 -o empty.o && readelf -SW empty.o | grep note.gnu
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* [Bug tools/28488] phdr[6]: unknown object file note type 32 with owner name '' at offset 48
2021-10-22 11:12 [Bug tools/28488] New: phdr[6]: unknown object file note type 32 with owner name '' at offset 48 mliska at suse dot cz
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@ 2021-10-22 14:33 ` mark at klomp dot org
2021-10-22 14:38 ` mliska at suse dot cz
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From: mark at klomp dot org @ 2021-10-22 14:33 UTC (permalink / raw)
To: elfutils-devel
https://sourceware.org/bugzilla/show_bug.cgi?id=28488
--- Comment #15 from Mark Wielaard <mark at klomp dot org> ---
(In reply to Martin Liska from comment #14)
> what do you see for:
>
> $ echo '' | as --64 -o empty.o && readelf -SW empty.o | grep note.gnu
Nothing with GNU assembler version 2.35.2-6.fc34 since no SHT_NOTE sections are
created.
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* [Bug tools/28488] phdr[6]: unknown object file note type 32 with owner name '' at offset 48
2021-10-22 11:12 [Bug tools/28488] New: phdr[6]: unknown object file note type 32 with owner name '' at offset 48 mliska at suse dot cz
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@ 2021-10-22 14:38 ` mliska at suse dot cz
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From: mliska at suse dot cz @ 2021-10-22 14:38 UTC (permalink / raw)
To: elfutils-devel
https://sourceware.org/bugzilla/show_bug.cgi?id=28488
--- Comment #16 from Martin Liska <mliska at suse dot cz> ---
All right, one can reproduce it in fedora/rawhide container:
$ podman run --rm -it fedora:rawhide /bin/bash
$ dnf install -y elfutils gcc
$ echo 'int main() { return 0; }' | gcc -x c - -fuse-ld=gold && eu-elflint
a.out
phdr[6]: unknown object file note type 32 with owner name '' at offset 48
phdr[6]: extra 72 bytes after last note
section [28] '.symtab': symbol 51 (_end): st_value out of bounds
section [28] '.symtab': symbol 52 (__bss_start): st_value out of bounds
section [28] '.symtab': symbol 53 (_edata): st_value out of bounds
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* [Bug tools/28488] phdr[6]: unknown object file note type 32 with owner name '' at offset 48
2021-10-22 11:12 [Bug tools/28488] New: phdr[6]: unknown object file note type 32 with owner name '' at offset 48 mliska at suse dot cz
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2021-10-22 14:38 ` mliska at suse dot cz
@ 2021-10-22 14:39 ` mliska at suse dot cz
2021-10-22 14:46 ` mliska at suse dot cz
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From: mliska at suse dot cz @ 2021-10-22 14:39 UTC (permalink / raw)
To: elfutils-devel
https://sourceware.org/bugzilla/show_bug.cgi?id=28488
--- Comment #17 from Martin Liska <mliska at suse dot cz> ---
(In reply to Martin Liska from comment #16)
> All right, one can reproduce it in fedora/rawhide container:
>
> $ podman run --rm -it fedora:rawhide /bin/bash
> $ dnf install -y elfutils gcc
> $ echo 'int main() { return 0; }' | gcc -x c - -fuse-ld=gold && eu-elflint
> a.out
> phdr[6]: unknown object file note type 32 with owner name '' at offset 48
> phdr[6]: extra 72 bytes after last note
> section [28] '.symtab': symbol 51 (_end): st_value out of bounds
> section [28] '.symtab': symbol 52 (__bss_start): st_value out of bounds
> section [28] '.symtab': symbol 53 (_edata): st_value out of bounds
ld.gold --version
GNU gold (version 2.37-15.fc36) 1.16
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* [Bug tools/28488] phdr[6]: unknown object file note type 32 with owner name '' at offset 48
2021-10-22 11:12 [Bug tools/28488] New: phdr[6]: unknown object file note type 32 with owner name '' at offset 48 mliska at suse dot cz
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2021-10-22 14:39 ` mliska at suse dot cz
@ 2021-10-22 14:46 ` mliska at suse dot cz
2021-10-22 14:47 ` mliska at suse dot cz
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From: mliska at suse dot cz @ 2021-10-22 14:46 UTC (permalink / raw)
To: elfutils-devel
https://sourceware.org/bugzilla/show_bug.cgi?id=28488
--- Comment #18 from Martin Liska <mliska at suse dot cz> ---
Note, there's BFD product:
$ eu-readelf -l a.out
Program Headers:
Type Offset VirtAddr PhysAddr FileSiz MemSiz
Flg Align
PHDR 0x000040 0x0000000000400040 0x0000000000400040 0x0002d8
0x0002d8 R 0x8
INTERP 0x000318 0x0000000000400318 0x0000000000400318 0x00001c
0x00001c R 0x1
[Requesting program interpreter: /lib64/ld-linux-x86-64.so.2]
LOAD 0x000000 0x0000000000400000 0x0000000000400000 0x000578
0x000578 R 0x1000
LOAD 0x001000 0x0000000000401000 0x0000000000401000 0x000121
0x000121 R E 0x1000
LOAD 0x002000 0x0000000000402000 0x0000000000402000 0x00008c
0x00008c R 0x1000
LOAD 0x002e30 0x0000000000403e30 0x0000000000403e30 0x0001f8
0x000200 RW 0x1000
DYNAMIC 0x002e40 0x0000000000403e40 0x0000000000403e40 0x0001a0
0x0001a0 RW 0x8
NOTE 0x000338 0x0000000000400338 0x0000000000400338 0x000040
0x000040 R 0x8
NOTE 0x000378 0x0000000000400378 0x0000000000400378 0x000044
0x000044 R 0x4
GNU_PROPERTY 0x000338 0x0000000000400338 0x0000000000400338 0x000040
0x000040 R 0x8
GNU_EH_FRAME 0x002004 0x0000000000402004 0x0000000000402004 0x000024
0x000024 R 0x4
GNU_STACK 0x000000 0x0000000000000000 0x0000000000000000 0x000000
0x000000 RW 0x10
GNU_RELRO 0x002e30 0x0000000000403e30 0x0000000000403e30 0x0001d0
0x0001d0 R 0x1
Section to Segment mapping:
Segment Sections...
00
01 [RO: .interp]
02 [RO: .interp .note.gnu.property .note.gnu.build-id .note.ABI-tag
.hash .gnu.hash .dynsym .dynstr .gnu.version .gnu.version_r .rela.dyn]
03 [RO: .init .text .fini]
04 [RO: .rodata .eh_frame_hdr .eh_frame]
05 [RELRO: .init_array .fini_array .dynamic .got] .got.plt .data .bss
06 [RELRO: .dynamic]
07 [RO: .note.gnu.property]
08 [RO: .note.gnu.build-id .note.ABI-tag]
09 [RO: .note.gnu.property]
10 [RO: .eh_frame_hdr]
11
12 [RELRO: .init_array .fini_array .dynamic .got]
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* [Bug tools/28488] phdr[6]: unknown object file note type 32 with owner name '' at offset 48
2021-10-22 11:12 [Bug tools/28488] New: phdr[6]: unknown object file note type 32 with owner name '' at offset 48 mliska at suse dot cz
` (17 preceding siblings ...)
2021-10-22 14:46 ` mliska at suse dot cz
@ 2021-10-22 14:47 ` mliska at suse dot cz
2021-10-22 14:55 ` mliska at suse dot cz
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24 siblings, 0 replies; 26+ messages in thread
From: mliska at suse dot cz @ 2021-10-22 14:47 UTC (permalink / raw)
To: elfutils-devel
https://sourceware.org/bugzilla/show_bug.cgi?id=28488
--- Comment #19 from Martin Liska <mliska at suse dot cz> ---
(In reply to Martin Liska from comment #18)
> Note, there's BFD product:
>
> $ eu-readelf -l a.out
> Program Headers:
> Type Offset VirtAddr PhysAddr FileSiz
> MemSiz Flg Align
> PHDR 0x000040 0x0000000000400040 0x0000000000400040 0x0002d8
> 0x0002d8 R 0x8
> INTERP 0x000318 0x0000000000400318 0x0000000000400318 0x00001c
> 0x00001c R 0x1
> [Requesting program interpreter: /lib64/ld-linux-x86-64.so.2]
> LOAD 0x000000 0x0000000000400000 0x0000000000400000 0x000578
> 0x000578 R 0x1000
> LOAD 0x001000 0x0000000000401000 0x0000000000401000 0x000121
> 0x000121 R E 0x1000
> LOAD 0x002000 0x0000000000402000 0x0000000000402000 0x00008c
> 0x00008c R 0x1000
> LOAD 0x002e30 0x0000000000403e30 0x0000000000403e30 0x0001f8
> 0x000200 RW 0x1000
> DYNAMIC 0x002e40 0x0000000000403e40 0x0000000000403e40 0x0001a0
> 0x0001a0 RW 0x8
> NOTE 0x000338 0x0000000000400338 0x0000000000400338 0x000040
> 0x000040 R 0x8
> NOTE 0x000378 0x0000000000400378 0x0000000000400378 0x000044
> 0x000044 R 0x4
> GNU_PROPERTY 0x000338 0x0000000000400338 0x0000000000400338 0x000040
> 0x000040 R 0x8
> GNU_EH_FRAME 0x002004 0x0000000000402004 0x0000000000402004 0x000024
> 0x000024 R 0x4
> GNU_STACK 0x000000 0x0000000000000000 0x0000000000000000 0x000000
> 0x000000 RW 0x10
> GNU_RELRO 0x002e30 0x0000000000403e30 0x0000000000403e30 0x0001d0
> 0x0001d0 R 0x1
>
> Section to Segment mapping:
> Segment Sections...
> 00
> 01 [RO: .interp]
> 02 [RO: .interp .note.gnu.property .note.gnu.build-id .note.ABI-tag
> .hash .gnu.hash .dynsym .dynstr .gnu.version .gnu.version_r .rela.dyn]
> 03 [RO: .init .text .fini]
> 04 [RO: .rodata .eh_frame_hdr .eh_frame]
> 05 [RELRO: .init_array .fini_array .dynamic .got] .got.plt .data .bss
> 06 [RELRO: .dynamic]
> 07 [RO: .note.gnu.property]
> 08 [RO: .note.gnu.build-id .note.ABI-tag]
> 09 [RO: .note.gnu.property]
> 10 [RO: .eh_frame_hdr]
> 11
> 12 [RELRO: .init_array .fini_array .dynamic .got]
readelf -n a.out
Displaying notes found in: .note.gnu.property
Owner Data size Description
GNU 0x00000030 NT_GNU_PROPERTY_TYPE_0
Properties: x86 ISA needed: x86-64-baseline
x86 feature used: x86
x86 ISA used:
Displaying notes found in: .note.gnu.build-id
Owner Data size Description
GNU 0x00000014 NT_GNU_BUILD_ID (unique build ID
bitstring)
Build ID: 88d835b48244c1c184983f733f6a7fafc44868c5
Displaying notes found in: .note.ABI-tag
Owner Data size Description
GNU 0x00000010 NT_GNU_ABI_TAG (ABI version tag)
OS: Linux, ABI: 3.2.0
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* [Bug tools/28488] phdr[6]: unknown object file note type 32 with owner name '' at offset 48
2021-10-22 11:12 [Bug tools/28488] New: phdr[6]: unknown object file note type 32 with owner name '' at offset 48 mliska at suse dot cz
` (18 preceding siblings ...)
2021-10-22 14:47 ` mliska at suse dot cz
@ 2021-10-22 14:55 ` mliska at suse dot cz
2021-10-22 15:03 ` mark at klomp dot org
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From: mliska at suse dot cz @ 2021-10-22 14:55 UTC (permalink / raw)
To: elfutils-devel
https://sourceware.org/bugzilla/show_bug.cgi?id=28488
--- Comment #20 from Martin Liska <mliska at suse dot cz> ---
With ld.gold one gets:
$ echo 'int main() { return 0; }' | gcc -x c - -fuse-ld=gold -o a.out
$ eu-readelf -l a.out
Program Headers:
Type Offset VirtAddr PhysAddr FileSiz MemSiz
Flg Align
PHDR 0x000040 0x0000000000400040 0x0000000000400040 0x000230
0x000230 R 0x8
INTERP 0x000270 0x0000000000400270 0x0000000000400270 0x00001c
0x00001c R 0x1
[Requesting program interpreter: /lib64/ld-linux-x86-64.so.2]
LOAD 0x000000 0x0000000000400000 0x0000000000400000 0x000688
0x000688 R E 0x1000
LOAD 0x000e08 0x0000000000401e08 0x0000000000401e08 0x000208
0x000209 RW 0x1000
DYNAMIC 0x000e18 0x0000000000401e18 0x0000000000401e18 0x0001b0
0x0001b0 RW 0x8
NOTE 0x0002b0 0x00000000004002b0 0x00000000004002b0 0x000030
0x000030 R 0x8
NOTE 0x00028c 0x000000000040028c 0x000000000040028c 0x000078
0x000078 R 0x4
GNU_EH_FRAME 0x000664 0x0000000000400664 0x0000000000400664 0x000024
0x000024 R 0x4
GNU_STACK 0x000000 0x0000000000000000 0x0000000000000000 0x000000
0x000000 RW 0x10
GNU_RELRO 0x000e08 0x0000000000401e08 0x0000000000401e08 0x0001f8
0x0001f8 RW 0x8
Section to Segment mapping:
Segment Sections...
00
01 [RO: .interp]
02 [RO: .interp .note.ABI-tag .note.gnu.property .note.gnu.build-id
.dynsym .dynstr .gnu.hash .hash .gnu.version .gnu.version_r .rela.dyn .init
.text .fini .rodata .eh_frame .eh_frame_hdr]
03 [RELRO: .fini_array .init_array .dynamic .got .got.plt] .data .bss
04 [RELRO: .dynamic]
05 [RO: .note.gnu.property]
06 [RO: .note.ABI-tag .note.gnu.property .note.gnu.build-id]
07 [RO: .eh_frame_hdr]
08
09 [RELRO: .fini_array .init_array .dynamic .got .got.plt]
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* [Bug tools/28488] phdr[6]: unknown object file note type 32 with owner name '' at offset 48
2021-10-22 11:12 [Bug tools/28488] New: phdr[6]: unknown object file note type 32 with owner name '' at offset 48 mliska at suse dot cz
` (19 preceding siblings ...)
2021-10-22 14:55 ` mliska at suse dot cz
@ 2021-10-22 15:03 ` mark at klomp dot org
2021-10-25 12:04 ` mark at klomp dot org
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From: mark at klomp dot org @ 2021-10-22 15:03 UTC (permalink / raw)
To: elfutils-devel
https://sourceware.org/bugzilla/show_bug.cgi?id=28488
--- Comment #21 from Mark Wielaard <mark at klomp dot org> ---
So we have 2 bugs, one for ld.bfd:
NOTE 0x000338 0x0000000000400338 0x0000000000400338 0x000040
0x000040 R 0x8
NOTE 0x000378 0x0000000000400378 0x0000000000400378 0x000044
0x000044 R 0x4
GNU_PROPERTY 0x000338 0x0000000000400338 0x0000000000400338 0x000040
0x000040 R 0x8
Where:
07 [RO: .note.gnu.property]
08 [RO: .note.gnu.build-id .note.ABI-tag]
09 [RO: .note.gnu.property]
So .note.gnu.property is covered twice. This is OK, but inefficient. It is not
clear to me whether the first PT_NOTE is really needed at all (maybe backwards
compatibility? but with what?) now that we have the GNU_PROPERTY.
The bug for ld.gold is more severe:
NOTE 0x0002b0 0x00000000004002b0 0x00000000004002b0 0x000030
0x000030 R 0x8
NOTE 0x00028c 0x000000000040028c 0x000000000040028c 0x000078
0x000078 R 0x4
Where:
05 [RO: .note.gnu.property]
06 [RO: .note.ABI-tag .note.gnu.property .note.gnu.build-id]
There is no PT_GNU_PROPERTY. But both segment 05 and segment 06 cover
.note.gnu.property, and segment 06 mixes notes using alignment 8 (causing
different padding) and alignment 4 (.note.gnu.property is sandwiched between
.note.ABI-tag and .note.gnu.build-id).
No wonder eu-elflint cannot parse this PT_NOTE segment.
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* [Bug tools/28488] phdr[6]: unknown object file note type 32 with owner name '' at offset 48
2021-10-22 11:12 [Bug tools/28488] New: phdr[6]: unknown object file note type 32 with owner name '' at offset 48 mliska at suse dot cz
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2021-10-22 15:03 ` mark at klomp dot org
@ 2021-10-25 12:04 ` mark at klomp dot org
2021-10-30 22:49 ` mark at klomp dot org
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From: mark at klomp dot org @ 2021-10-25 12:04 UTC (permalink / raw)
To: elfutils-devel
https://sourceware.org/bugzilla/show_bug.cgi?id=28488
Mark Wielaard <mark at klomp dot org> changed:
What |Removed |Added
----------------------------------------------------------------------------
See Also| |https://sourceware.org/bugz
| |illa/show_bug.cgi?id=28494
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* [Bug tools/28488] phdr[6]: unknown object file note type 32 with owner name '' at offset 48
2021-10-22 11:12 [Bug tools/28488] New: phdr[6]: unknown object file note type 32 with owner name '' at offset 48 mliska at suse dot cz
` (21 preceding siblings ...)
2021-10-25 12:04 ` mark at klomp dot org
@ 2021-10-30 22:49 ` mark at klomp dot org
2021-11-01 3:53 ` mliska at suse dot cz
2021-11-01 9:58 ` mark at klomp dot org
24 siblings, 0 replies; 26+ messages in thread
From: mark at klomp dot org @ 2021-10-30 22:49 UTC (permalink / raw)
To: elfutils-devel
https://sourceware.org/bugzilla/show_bug.cgi?id=28488
--- Comment #22 from Mark Wielaard <mark at klomp dot org> ---
So I think we don't have an elfutils bug here. But I haven't tried the gold
patch. Have you? Can we close this bug?
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* [Bug tools/28488] phdr[6]: unknown object file note type 32 with owner name '' at offset 48
2021-10-22 11:12 [Bug tools/28488] New: phdr[6]: unknown object file note type 32 with owner name '' at offset 48 mliska at suse dot cz
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2021-10-30 22:49 ` mark at klomp dot org
@ 2021-11-01 3:53 ` mliska at suse dot cz
2021-11-01 9:58 ` mark at klomp dot org
24 siblings, 0 replies; 26+ messages in thread
From: mliska at suse dot cz @ 2021-11-01 3:53 UTC (permalink / raw)
To: elfutils-devel
https://sourceware.org/bugzilla/show_bug.cgi?id=28488
--- Comment #23 from Martin Liska <mliska at suse dot cz> ---
(In reply to Mark Wielaard from comment #22)
> So I think we don't have an elfutils bug here. But I haven't tried the gold
> patch. Have you? Can we close this bug?
I can confirm the gold patch works!
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* [Bug tools/28488] phdr[6]: unknown object file note type 32 with owner name '' at offset 48
2021-10-22 11:12 [Bug tools/28488] New: phdr[6]: unknown object file note type 32 with owner name '' at offset 48 mliska at suse dot cz
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2021-11-01 3:53 ` mliska at suse dot cz
@ 2021-11-01 9:58 ` mark at klomp dot org
24 siblings, 0 replies; 26+ messages in thread
From: mark at klomp dot org @ 2021-11-01 9:58 UTC (permalink / raw)
To: elfutils-devel
https://sourceware.org/bugzilla/show_bug.cgi?id=28488
Mark Wielaard <mark at klomp dot org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Resolution|--- |MOVED
Status|UNCONFIRMED |RESOLVED
--- Comment #24 from Mark Wielaard <mark at klomp dot org> ---
Lets close this on the elfutils side. binutils bug is
https://sourceware.org/bugzilla/show_bug.cgi?id=28494
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