[Bug general/29082] New: Support GNU_PROPERTY_TYPE_0 in eu-readelf -n

[Bug general/29082] New: Support GNU_PROPERTY_TYPE_0 in eu-readelf -n

[mliska at suse dot cz]

https://sourceware.org/bugzilla/show_bug.cgi?id=29082

            Bug ID: 29082
           Summary: Support GNU_PROPERTY_TYPE_0 in eu-readelf -n
           Product: elfutils
           Version: unspecified
            Status: UNCONFIRMED
          Severity: normal
          Priority: P2
         Component: general
          Assignee: unassigned at sourceware dot org
          Reporter: mliska at suse dot cz
                CC: elfutils-devel at sourceware dot org, mark at klomp dot org
  Target Milestone: ---

Please support the following:

$ readelf -n a.o

Displaying notes found in: .note.gnu.property
  Owner                Data size        Description
  GNU                  0x00000020       NT_GNU_PROPERTY_TYPE_0
      Properties: x86 ISA used: 
        x86 feature used: x86

$ eu-readelf -n a.o

Note section [ 4] '.note.gnu.property' of 48 bytes at offset 0x1c0:
  Owner          Data size  Type
  GNU                   32  GNU_PROPERTY_TYPE_0
    X86 0xc0010002 data: 00 00 00 00
    X86 0xc0010001 data: 01 00 00 00

So the data output can be parsed to 'x86'.

On the other hand, 'Properties: x86 feature' are printed quite fine:

$ echo '' | gcc -c -fcf-protection=full -x c - -o a.o && readelf -n a.o

Displaying notes found in: .note.gnu.property
  Owner                Data size        Description
  GNU                  0x00000010       NT_GNU_PROPERTY_TYPE_0
      Properties: x86 feature: IBT, SHSTK
  GNU                  0x00000020       NT_GNU_PROPERTY_TYPE_0
      Properties: x86 ISA used: 
        x86 feature used: x86

$ echo '' | gcc -c -fcf-protection=full -x c - -o a.o && eu-readelf -n a.o

Note section [ 6] '.note.gnu.property' of 80 bytes at offset 0x98:
  Owner          Data size  Type
  GNU                   16  GNU_PROPERTY_TYPE_0
    X86 FEATURE_1_AND: 00000003 IBT SHSTK
  GNU                   32  GNU_PROPERTY_TYPE_0
    X86 0xc0010002 data: 00 00 00 00
    X86 0xc0010001 data: 01 00 00 00

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[Bug general/29082] Support GNU_PROPERTY_TYPE_0 in eu-readelf -n

[mark at klomp dot org]

https://sourceware.org/bugzilla/show_bug.cgi?id=29082

--- Comment #1 from Mark Wielaard <mark at klomp dot org> ---
Do you have a spec for that?

The GNU PROPERTY constants seem to change from time to time.

See e.g. the last glibc elf.h sync:

commit 31d551ae4dd8cf307c68f86b6c1ecac2f92b522a
Author: Mark Wielaard <mark@klomp.org>
Date:   Thu Mar 24 23:06:09 2022 +0100

    libelf: Sync elf.h from glibc.

    Adds EM_INTELGT, NT_ARM_TAGGED_ADDR_CTRL, NT_ARM_PAC_ENABLED_KEYS,
    ELF_NOTE_FDO, NT_FDO_PACKAGING_METADATA and OpenRISC 1000 specific
    relocs.

    It also adds and renames some GNU_PROPERTY constants. But none of the
    constants the elfutils code uses was renamed or given a different
    constant value.

    dwelf_elf_e_machine_string was updated to handle EM_INTELGT.

    Signed-off-by: Mark Wielaard <mark@klomp.org>

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[Bug general/29082] Support GNU_PROPERTY_TYPE_0 in eu-readelf -n

[mliska at suse dot cz]

https://sourceware.org/bugzilla/show_bug.cgi?id=29082

Martin Liska <mliska at suse dot cz> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |fweimer at redhat dot com,
                   |                            |hjl at sourceware dot org

--- Comment #2 from Martin Liska <mliska at suse dot cz> ---
(In reply to Mark Wielaard from comment #1)
> Do you have a spec for that?

Ccing Florian and H.J. who should know that.

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[Bug general/29082] Support GNU_PROPERTY_TYPE_0 in eu-readelf -n

[hjl.tools at gmail dot com]

https://sourceware.org/bugzilla/show_bug.cgi?id=29082

--- Comment #3 from H.J. Lu <hjl.tools at gmail dot com> ---
NT_GNU_PROPERTY_TYPE_0 is documented in

https://gitlab.com/x86-psABIs/Linux-ABI/-/wikis/uploads/0690db0a3b7e5d8a44e0271a4be54aa7/linux-gABI-and-or-2021-01-13.pdf
https://gitlab.com/x86-psABIs/x86-64-ABI/-/wikis/uploads/01de35b2c8adc7545de52604cc45d942/x86-64-psABI-2021-05-20.pdf

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