git: rtld: Implement ELF filters (DT_FILTER and DT_AUXILIARY)

[John Marino <marino@xxxxxxxxxxxxxxxxxxxxxxx>]

commit 35b2b265aa300727e840990e41e604edb8b25314
Author: John Marino <draco@marino.st>
Date:   Sat Jan 21 18:31:30 2012 +0100

    rtld: Implement ELF filters (DT_FILTER and DT_AUXILIARY)
    
    Filtrees are loaded on demand unless LD_LOADFLTR environment variable is
    set or -z loadfltr was specified during the linking.  This forces rtld
    to upgrade read-locked rtld_bind_lock to write lock when it encounters an
    object with filter during symbol lookup.
    
    Consolidate common arguments of the symbol lookup functions in the SymLook
    structure.
    
    Taken-from: FreeBSD SVN 216728 (27 DEC 2010)

Summary of changes:
 libexec/rtld-elf/i386/reloc.c   |   48 ++--
 libexec/rtld-elf/rtld.1         |   10 +-
 libexec/rtld-elf/rtld.c         |  604 ++++++++++++++++++++++++++-------------
 libexec/rtld-elf/rtld.h         |   44 +++-
 libexec/rtld-elf/x86_64/reloc.c |   46 ++--
 5 files changed, 511 insertions(+), 241 deletions(-)

http://gitweb.dragonflybsd.org/dragonfly.git/commitdiff/35b2b265aa300727e840990e41e604edb8b25314


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