[Bug gdb/28785] New: Support SHT_RELR (.relr.dyn) section

[Bug gdb/28785] New: Support SHT_RELR (.relr.dyn) section

[brobecker at gnat dot com]

https://sourceware.org/bugzilla/show_bug.cgi?id=28785

            Bug ID: 28785
           Summary: Support SHT_RELR (.relr.dyn) section
           Product: gdb
           Version: 11.2
            Status: NEW
          Severity: normal
          Priority: P2
         Component: gdb
          Assignee: unassigned at sourceware dot org
          Reporter: brobecker at gnat dot com
  Target Milestone: ---

PR to document the backport of the following commits, pushed on Jan 10th, 2022:

commit fb0b83d80d11c2501a9262198f26a820b09f5258
Author: Fangrui Song <maskray@google.com>
Date:   Tue Dec 7 18:24:14 2021 -0800

    bfd_section_from_shdr: Support SHT_RELR sections

    If a.so contains an SHT_RELR section, objcopy a.so will fail with:

        a.so: unknown type [0x13] section `.relr.dyn'

    This change allows objcopy to work.

    bfd/
        * elf.c (bfd_section_from_shdr): Support SHT_RELR.

    (cherry picked from commit a619b58721f0a03fd91c27670d3e4c2fb0d88f1e)

commit 67609c9c701ea8a679d80e3352266b058b184f4b
Author: Fangrui Song <maskray@google.com>
Date:   Tue Nov 16 13:03:57 2021 -0800

    readelf: Support SHT_RELR/DT_RELR for -r

    The -r output for SHT_RELR looks like:

    Relocation section '.relr.dyn' at offset 0x530 contains 4 entries:
      7 offsets
    00000000000028c0
    00000000000028c8
    0000000000003ad0
    0000000000003ad8
    0000000000003ae0
    0000000000003ae8
    0000000000003af0

    For --use-dynamic, the header looks like

        'RELR' relocation section at offset 0x530 contains 32 bytes:

    include/
        * elf/common.h (DT_ENCODING): Bump to 38.
        * elf/external.h (Elf32_External_Relr): New.
        (Elf64_External_Relr): New.

    (cherry picked from commit a7fd11862703e45d2774981a4888bc127d473b06)

commit 1b244ed9d3f4dc3df364bcd65332985ab03de302
Author: Fangrui Song <maskray@google.com>
Date:   Thu Nov 4 01:30:12 2021 -0700

    readelf: Support RELR in -S and -d and output

    readelf -r dumping support is not added in this patch.

    include/
            * elf/common.h: Add SHT_RELR, DT_RELR{,SZ,ENT}
    bfd/
            * elf.c (_bfd_elf_print_private_bfd_data): Add DT_RELR{,SZ,ENT}.

    (cherry picked from commit dd207c1302d28d2d2b33cff058bb3fbf5138b480)

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[Bug gdb/28785] Support SHT_RELR (.relr.dyn) section

[brobecker at gnat dot com]

https://sourceware.org/bugzilla/show_bug.cgi?id=28785

Joel Brobecker <brobecker at gnat dot com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |hjl.tools at gmail dot com

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[Bug gdb/28785] Support SHT_RELR (.relr.dyn) section

[brobecker at gnat dot com]

https://sourceware.org/bugzilla/show_bug.cgi?id=28785

Joel Brobecker <brobecker at gnat dot com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
            Version|11.2                        |11.1
             Status|NEW                         |RESOLVED
   Target Milestone|---                         |11.2
         Resolution|---                         |FIXED

--- Comment #1 from Joel Brobecker <brobecker at gnat dot com> ---
backports completed on Jan 10th.

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[Bug gdb/28785] Support SHT_RELR (.relr.dyn) section

[hjl.tools at gmail dot com]

https://sourceware.org/bugzilla/show_bug.cgi?id=28785

H.J. Lu <hjl.tools at gmail dot com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
         Resolution|FIXED                       |DUPLICATE

--- Comment #2 from H.J. Lu <hjl.tools at gmail dot com> ---
Dup

*** This bug has been marked as a duplicate of bug 28758 ***

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