glibc/SOURCES/glibc-fedora-__libc_multiple_libcs.patch

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2019-08-05 14:38:49 +00:00
Short description: Cleanup use of _dl_starting_up.
Author(s): Fedora glibc team <glibc@lists.fedoraproject.org>
Origin: PATCH
Upstream status: https://sourceware.org/ml/libc-alpha/2014-02/msg00589.html
Upstream discussions:
https://sourceware.org/ml/libc-alpha/2014-02/msg00580.html
Based on the following commit:
~~~
From 16552c01a66633c9e412984d9d92616bd4e5303c Mon Sep 17 00:00:00 2001
From: Andreas Schwab <schwab@redhat.com>
Date: Fri, 11 Jun 2010 11:04:11 +0200
Subject: [PATCH] Properly set __libc_multiple_libcs
* elf/rtld.c (_dl_starting_up): Always define.
(dl_main): Always set _dl_starting_up.
* elf/dl-support.c (_dl_starting_up): Always define.
* elf/dl-init.c (_dl_init): Always clear _dl_starting_up.
---
ChangeLog | 7 +++++++
elf/dl-init.c | 4 ----
elf/dl-support.c | 2 --
elf/rtld.c | 4 ----
4 files changed, 7 insertions(+), 10 deletions(-)
~~~
This patch needs to go upstream to get cleaned up, but has always involed
analysis of the GNU/Hurd parts of the change and that stalled out, but
perhaps with build-many-glibcs we can now test these changes more easily.
Index: b/elf/dl-init.c
===================================================================
--- a/elf/dl-init.c
+++ b/elf/dl-init.c
@@ -119,8 +119,6 @@ _dl_init (struct link_map *main_map, int
while (i-- > 0)
call_init (main_map->l_initfini[i], argc, argv, env);
-#ifndef HAVE_INLINED_SYSCALLS
/* Finished starting up. */
_dl_starting_up = 0;
-#endif
}
Index: b/elf/dl-support.c
===================================================================
--- a/elf/dl-support.c
+++ b/elf/dl-support.c
@@ -117,10 +117,8 @@ struct r_scope_elem _dl_initial_searchli
.r_nlist = 1,
};
-#ifndef HAVE_INLINED_SYSCALLS
/* Nonzero during startup. */
int _dl_starting_up = 1;
-#endif
/* Random data provided by the kernel. */
void *_dl_random;
Index: b/elf/rtld.c
===================================================================
--- a/elf/rtld.c
+++ b/elf/rtld.c
@@ -214,7 +214,6 @@ audit_list_iter_next (struct audit_list_
return iter->previous->name;
}
-#ifndef HAVE_INLINED_SYSCALLS
/* Set nonzero during loading and initialization of executable and
libraries, cleared before the executable's entry point runs. This
must not be initialized to nonzero, because the unused dynamic
@@ -224,7 +223,6 @@ audit_list_iter_next (struct audit_list_
never be called. */
int _dl_starting_up = 0;
rtld_hidden_def (_dl_starting_up)
-#endif
/* This is the structure which defines all variables global to ld.so
(except those which cannot be added for some reason). */
@@ -898,10 +896,8 @@ dl_main (const ElfW(Phdr) *phdr,
/* Process the environment variable which control the behaviour. */
process_envvars (&mode);
-#ifndef HAVE_INLINED_SYSCALLS
/* Set up a flag which tells we are just starting. */
_dl_starting_up = 1;
-#endif
if (*user_entry == (ElfW(Addr)) ENTRY_POINT)
{