src-test2/libexec/rtld-elf, branch release/7.2.0_cvs

Copy releng/7.2 to release/7.2.0 for FreeBSD 7.2-RELEASE.

2009-05-01T02:51:58Z

Approved by: re (implicit) This commit was manufactured to restore the state of the 7.2-RELEASE image.

Mostly synchronize lib/libthr and sys/kern/kern_umtx.c with the code

2009-03-24T20:57:10Z

from HEAD. Since libkse is still built on RELENG_7, pthread_cleanup_push/pop are left as the functions, but the support code in libthr is present for the macro versions. Malloc in RELENG_7 does not require thread exit hook, but I decided to add empty handler for it, instead of removing callback from thr_exit(). No mergeinfo since this change is prepared by patching libthr and then bringing in required missed bits. Requested by: bms Reviewed by: davidxu Tested by: bms, Mykola Dzham Approved by: re (kensmith)

MFC r182698 (by kan):

2008-11-05T12:32:42Z
Make sure internal rtld malloc routines are not called from unlocked contexts as rtld's malloc is not thread safe and is only supposed to be called with exclusive bind lock already held. Approved by: re (kensmith), kan

MFC r183737 (by kan):

2008-11-05T12:28:44Z
Allow strong symbols to override weak ones for lookups done through dlsym with RTLD_NEXT/RTLD_SELF handles. Allow symbols from ld-elf.so to be located this way too. Approved by: re (kensmith), kan

Merge revision 183061 from head to stable/7.

2008-10-31T09:09:22Z
> Allow multiple locks to be acquired by detecting corresponding > bit flag, otherwise if a thread acquired a lock, another thread > or the current thread itself can no longer acquire another lock > because thread_mask_set() return whole flag word, this results > bit leaking in the word and misbehavior in later locking and > unlocking. Approved by: re (kib)

MFC

2008-05-20T09:38:44Z
rev. 1.126 of libexec/rtld-elf/rtld.c rev. 1.5 of libexec/rtld-elf/rtld_lock.c rev. 1.3 of libexec/rtld-elf/rtld_lock.h Fix the problem with the C++ exception handling for the multithreaded programs. From the PR description: The gcc runtime's _Unwind_Find_FDE function, invoked during exception handling's stack unwinding, is not safe to execute from within multiple threads. FreeBSD' s dl_iterate_phdr() however permits multiple threads to pass through it though. The result is surprisingly reliable infinite looping of one or more threads if they just happen to be unwinding at the same time. Introduce the new lock that is write locked around the dl_iterate_pdr, thus providing required exclusion for the stack unwinders. PR: threads/123062 Submitted by: Andy Newman Reviewed by: kan

MFC: libexec/rtld-elf/sparc64/reloc.c 1.16,

2007-10-21T21:09:55Z
sys/sparc64/sparc64/elf_machdep.c 1.24 - Fix the handling of R_SPARC_OLO10, which is a bit of a special case in the way we implement handling of relocations. As for the kernel part this fixes the loading of lots of modules, which failed to load due to unresolvable symbols when built after the GCC 4.2.0 import. This wasn't due to a change in GCC itself though but one of several changes in configuration done along the import. Specfically, HAVE_AS_REGISTER_PSEUDO_OP, which causes GCC to denote global registers used for scratch purposes and in turn GAS uses R_SPARC_OLO10 relocations for, is now defined. While at it replace some more ELF_R_TYPE which should have been ELF64_R_TYPE_ID but didn't cause problems so far. - Sync a sanity check between kernel and rtld(1) and change it to be maintenance free regarding the type used for the lookup table. - Sprinkle const on lookup tables. - Use __FBSDID. Approved by: re (kensmith)

Unbreak the dynamic linker by not creating a cache for rtld-elf

2007-07-15T22:52:15Z
itself. It needs mmap(2), which now needs getosreldate(3) and which in turn uses a global variable to cache the result. This cannot be done before linking is done. See also: ../sparc64/reloc.c:1.15 Approved by: re (kensmith)

Cache does not serve any purpose when rtld is relocating itself, do

2007-07-13T16:18:43Z
not bother allocating one. Submitted by: kan Approved by: re (bmah)

Add r_debug_state to the list of symbols exported from rtld. GDB needs to

2007-07-11T23:07:37Z
be able to find it in order to trap shared library events from rtld. Approved by: re (rwatson)