Konstantin Belousov b88a8d3d1d Fix acquisition of nested write compat rtld locks. ... Obtaining compat rtld lock in write mode sets process signal mask to block all signals. Previous mask is stored in the global variable oldsigmask. If a lock is write-locked while another lock is already write-locked, oldsigmask is overwritten by the total mask and on the last unlock, all signals except traps appear to be blocked. Fix this by counting the write-lock nested level, and only storing to oldsigmask/restoring from it at the outermost level. Masking signals disables involuntary preemption for libc_r, and there could be no voluntary context switches in the locked code (dl_iterate_phdr(3) keeps a lock around user callback, but it was added long after libc_r was renounced). Due to this, remembering the level in the global variable after the lock is obtained should be safe, because no two libc_r threads can acquire different write locks in parallel. PR: 215826 Reported by: kami Tested by: yamagi@yamagi.org (previous version) To be reviewed by: kan Sponsored by: The FreeBSD Foundation MFC after: 2 weeks		2017-01-10 19:26:55 +00:00
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aarch64	Retire long-broken/unused static rtld support	2016-12-02 14:23:26 +00:00
amd64	Adjust r308689 to make rtld compilable with either in-tree or	2016-11-21 14:13:57 +00:00
arm	Adjust r308689 to make rtld compilable with either in-tree or	2016-11-21 14:13:57 +00:00
i386	Adjust r308689 to make rtld compilable with either in-tree or	2016-11-21 14:13:57 +00:00
mips	Fix _mips_rtld_bind() to handle ELF filters.	2016-11-23 20:21:53 +00:00
powerpc	Adjust r308689 to make rtld compilable with either in-tree or	2016-11-21 14:13:57 +00:00
powerpc64	Adjust r308689 to make rtld compilable with either in-tree or	2016-11-21 14:13:57 +00:00
riscv	Retire long-broken/unused static rtld support	2016-12-02 14:23:26 +00:00
sparc64	Retire long-broken/unused static rtld support	2016-12-02 14:23:26 +00:00
tests	DIRDEPS_BUILD: Add some missing dirctories to the build.	2016-08-31 19:30:59 +00:00
debug.c	Do not call callbacks for dl_iterate_phdr(3) with the rtld bind and	2016-01-20 07:21:33 +00:00
debug.h	Remove historical GNUC test	2015-05-06 15:29:11 +00:00
libmap.c	Rather than using the #define for path names, indirect through a char *	2015-10-31 04:39:55 +00:00
libmap.h	Make the directory mapping functionality, which was previously only	2013-09-21 21:03:52 +00:00
Makefile	Assert that there is no unresolved symbols during rtld linking.	2016-11-15 09:40:03 +00:00
Makefile.depend	new depends	2015-06-16 23:37:19 +00:00
malloc.c	libexec: minor spelling fixes in comments.	2016-05-01 19:39:23 +00:00
map_object.c	Fix handling of DT_TEXTREL for an object with more than one read-only	2016-03-02 16:36:24 +00:00
paths.h	Convert casperd(8) daemon to the libcasper.	2016-02-25 18:23:40 +00:00
rtld.1	mdoc: remove superfluous paragraph macros.	2014-06-23 18:40:21 +00:00
rtld.c	rtld: Fix a couple of bugs around the unloading of ELF filters.	2016-12-22 17:44:27 +00:00
rtld.h	rtld: Ensure that dlopen() cannot obtain a reference on a doomed object.	2016-12-22 17:41:32 +00:00
rtld_lock.c	Fix acquisition of nested write compat rtld locks.	2017-01-10 19:26:55 +00:00
rtld_lock.h	Change compiler setting to make default visibility of the symbols for	2015-03-29 18:53:21 +00:00
rtld_printf.c	Add the LD_LIBRARY_PATH_FDS environmental variable.	2014-06-20 17:08:32 +00:00
rtld_printf.h	Add the LD_LIBRARY_PATH_FDS environmental variable.	2014-06-20 17:08:32 +00:00
rtld_tls.h	Change compiler setting to make default visibility of the symbols for	2015-03-29 18:53:21 +00:00
rtld_utrace.h	Move defines common between rtld and libsysdecode into the header,	2016-08-12 19:31:41 +00:00
Symbol.map	Add rtld private interface for dso to detect dynamic loading	2015-01-03 18:09:53 +00:00
xmalloc.c	Increase alignment to size of pointer if the alignment is too small.	2014-02-22 11:06:48 +00:00