[Bug dynamic-link/28129] New: Unnecessary check DT_DEBUG in ld.so

[Bug dynamic-link/28129] New: Unnecessary check DT_DEBUG in ld.so

[hjl.tools at gmail dot com]

https://sourceware.org/bugzilla/show_bug.cgi?id=28129

            Bug ID: 28129
           Summary: Unnecessary check DT_DEBUG in ld.so
           Product: glibc
           Version: 2.34
            Status: NEW
          Severity: normal
          Priority: P2
         Component: dynamic-link
          Assignee: unassigned at sourceware dot org
          Reporter: hjl.tools at gmail dot com
  Target Milestone: ---

rtld.c has

 /* Fill in the pointer in the dynamic linker's own dynamic section, in
     case you run gdb on the dynamic linker directly.  */
  if (GL(dl_rtld_map).l_info[DT_DEBUG] != NULL)
    GL(dl_rtld_map).l_info[DT_DEBUG]->d_un.d_ptr = (ElfW(Addr)) r;

But linker never generates DT_DEBUG in shared libraries.  It should be removed
or linker should add a new option to generate DT_DEBUG in shared libraries.

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[Bug dynamic-link/28129] Unnecessary check DT_DEBUG in ld.so

[cvs-commit at gcc dot gnu.org]

https://sourceware.org/bugzilla/show_bug.cgi?id=28129

--- Comment #1 from cvs-commit at gcc dot gnu.org <cvs-commit at gcc dot gnu.org> ---
The master branch has been updated by H.J. Lu <hjl@sourceware.org>:

https://sourceware.org/git/gitweb.cgi?p=glibc.git;h=3234a31b489707f19ec6d4c9909af06f20ddb901

commit 3234a31b489707f19ec6d4c9909af06f20ddb901
Author: H.J. Lu <hjl.tools@gmail.com>
Date:   Mon Aug 2 13:52:36 2021 -0700

    ld.so: Don't fill the DT_DEBUG entry in ld.so [BZ #28129]

    Linker creates the DT_DEBUG entry only in executables.  Don't fill the
    non-existent DT_DEBUG entry in ld.so with the run-time address of the
    r_debug structure.  This fixes BZ #28129.

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[Bug dynamic-link/28129] Unnecessary check DT_DEBUG in ld.so

[hjl.tools at gmail dot com]

https://sourceware.org/bugzilla/show_bug.cgi?id=28129

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

           What    |Removed                     |Added
----------------------------------------------------------------------------
   Target Milestone|---                         |2.35
         Resolution|---                         |FIXED
             Status|NEW                         |RESOLVED

--- Comment #2 from H.J. Lu <hjl.tools at gmail dot com> ---
Fixed for 2.35.

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