From: Florian Weimer <fweimer@redhat.com>
To: libc-alpha@sourceware.org
Subject: [PATCH 0/4] _r_debug copy relocation support
Date: Thu, 23 Dec 2021 19:43:07 +0100 [thread overview]
Message-ID: <cover.1640284721.git.fweimer@redhat.com> (raw)
I implemented this because we received a bug that the _r_debug extension
mechanism broke dyninst. But it turns out it wasn't because of a copy
relocation: dyninst has its own interposing *definition* of _r_debug, so
the patch series doesn't solve this. It can only handle an interposing
definition in the main executable, not one in shared object (although I
guess in theory we could fix this).
The first two patches are independently useful, and the second two
patches could be used if we ever need to implement copy relocation
support for _r_debug.
Tested on i686-linux-gnu and x86_64-linux-gnu.
Thanks,
Florian
Florian Weimer (4):
elf: Introduce separate _r_debug_array variable
elf: Introduce _dl_debug_change_state
elf: Support version-less lookup in _dl_lookup_direct
elf: Restore support for _r_debug copy relocations
elf/Makefile | 8 +++
elf/dl-close.c | 6 +-
elf/dl-debug.c | 138 ++++++++++++++++++++++++++-----------
elf/dl-load.c | 6 +-
elf/dl-lookup-direct.c | 5 ++
elf/dl-open.c | 5 +-
elf/rtld.c | 10 +--
elf/tst-dlmopen4-nonpic.c | 2 +
elf/tst-dlmopen4-pic.c | 2 +
elf/tst-dlmopen4.c | 22 ++++++
sysdeps/generic/ldsodefs.h | 27 ++++++--
11 files changed, 168 insertions(+), 63 deletions(-)
create mode 100644 elf/tst-dlmopen4-nonpic.c
create mode 100644 elf/tst-dlmopen4-pic.c
base-commit: 9702a7901e18460e8ffc5f56a493d41294a8e936
--
2.33.1
next reply other threads:[~2021-12-23 18:43 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-12-23 18:43 Florian Weimer [this message]
2021-12-23 18:43 ` [PATCH 1/4] elf: Introduce separate _r_debug_array variable Florian Weimer
2021-12-23 18:43 ` [PATCH 2/4] elf: Introduce _dl_debug_change_state Florian Weimer
2021-12-23 18:43 ` [PATCH 3/4] elf: Support version-less lookup in _dl_lookup_direct Florian Weimer
2021-12-23 18:43 ` [PATCH 4/4] elf: Restore support for _r_debug copy relocations Florian Weimer
2021-12-23 19:18 ` [PATCH 0/4] _r_debug copy relocation support H.J. Lu
2021-12-23 19:59 ` Florian Weimer
2021-12-23 20:47 ` H.J. Lu
2021-12-23 21:00 ` Florian Weimer
2021-12-23 21:50 ` H.J. Lu
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