K 10
svn:author
V 3
kib
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svn:date
V 27
2012-05-09T15:57:59.267646Z
K 7
svn:log
V 952
MFC r211706:
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.

MFC r211894:
Do not call __pthread_cxa_finalize with invalid struct dl_phdr_info.

Requested and tested by:	Peter Jeremy <peter rulingia com>

END