Date: Mon, 23 Aug 2010 15:38:02 +0000 (UTC) From: Konstantin Belousov <kib@FreeBSD.org> To: cvs-src-old@freebsd.org Subject: cvs commit: src/lib/libc/gen Makefile.inc Symbol.map elf_utils.c src/lib/libc/include libc_private.h src/lib/libc/stdlib atexit.c src/lib/libthr pthread.map src/lib/libthr/thread thr_fork.c thr_private.h src/libexec/rtld-elf rtld.c Message-ID: <201008231538.o7NFcfVq023746@repoman.freebsd.org>
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kib 2010-08-23 15:38:02 UTC
FreeBSD src repository
Modified files:
lib/libc/gen Makefile.inc Symbol.map
lib/libc/include libc_private.h
lib/libc/stdlib atexit.c
lib/libthr pthread.map
lib/libthr/thread thr_fork.c thr_private.h
libexec/rtld-elf rtld.c
Added files:
lib/libc/gen elf_utils.c
Log:
SVN rev 211706 on 2010-08-23 15:38:02Z by kib
On shared object unload, in __cxa_finalize, call and clear all installed
atexit and __cxa_atexit handlers that are either installed by unloaded
dso, or points to the functions provided by the dso.
Use _rtld_addr_phdr to locate segment information from the address of
private variable belonging to the dso, supplied by crtstuff.c. Provide
utility function __elf_phdr_match_addr to do the match of address against
dso executable segment.
Call back into libthr from __cxa_finalize using weak
__pthread_cxa_finalize symbol to remove any atfork handler which
function points into unloaded object.
The rtld needs private __pthread_cxa_finalize symbol to not require
resolution of the weak undefined symbol at initialization time. This
cannot work, since rtld is relocated before sym_zero is set up.
Idea by: kan
Reviewed by: kan (previous version)
MFC after: 3 weeks
Revision Changes Path
1.155 +1 -1 src/lib/libc/gen/Makefile.inc
1.35 +1 -0 src/lib/libc/gen/Symbol.map
1.1 +47 -0 src/lib/libc/gen/elf_utils.c (new)
1.25 +2 -0 src/lib/libc/include/libc_private.h
1.11 +20 -3 src/lib/libc/stdlib/atexit.c
1.34 +1 -0 src/lib/libthr/pthread.map
1.15 +22 -0 src/lib/libthr/thread/thr_fork.c
1.99 +3 -0 src/lib/libthr/thread/thr_private.h
1.155 +12 -0 src/libexec/rtld-elf/rtld.c
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