src/libexec/rtld-elf/rtld.c, branch releng/6.1

MFC standardization of the ELF types and update of the ELF constants:

2005-12-30T22:13:59+00:00

	lib/libc/gen/nlist.c:1.19
	libexec/rtld-elf/rtld.c:1.108
	libexec/rtld-elf/rtld.h:1.36
	libexec/rtld-elf/alpha/reloc.c:1.21
	libexec/rtld-elf/amd64/reloc.c:1.16
	libexec/rtld-elf/ia64/reloc.c:1.16
	libexec/rtld-elf/sparc64/reloc.c:1.11
	share/man/man5/elf.5:1.32-1.33
	sys/alpha/alpha/elf_machdep.c:1.20
	sys/amd64/amd64/elf_machdep.c:1.24
	sys/boot/common/bootstrap.h:1.42
	sys/boot/common/load_elf.c:1.33
	sys/boot/common/load_elf_obj.c:1.2
	sys/boot/common/reloc_elf.c:1.2
	sys/ia64/ia64/elf_machdep.c:1.21
	sys/kern/link_elf.c:1.87
	sys/kern/link_elf_obj.c:1.90
	sys/sparc64/sparc64/elf_machdep.c:1.20
	sys/sys/elf32.h:1.9-1.10
	sys/sys/elf64.h:1.11-1.13
	sys/sys/elf_common.h:1.16
	sys/sys/elf_generic.h:1.7
	sys/sys/imgact_elf.h:1.28
	sys/sys/linker.h:1.40
	usr.bin/elf2aout/elf2aout.c:1.10
	usr.bin/elfdump/elfdump.c:1.13
	usr.sbin/crunch/crunchide/exec_elf32.c:1.15
	usr.sbin/kldxref/ef.c:1.9
	usr.sbin/kldxref/ef.h:1.6
	usr.sbin/kldxref/ef_amd64.c:1.3
	usr.sbin/kldxref/ef_i386.c:1.3
	usr.sbin/kldxref/ef_obj.c:1.4
	usr.sbin/kldxref/ef_powerpc.c:1.3
	usr.sbin/kldxref/ef_sparc64.c:1.4-1.5

MFC: Include the size of the DL_serpath structures in the total size used

2005-11-28T19:19:39+00:00

in the RTLD_DI_SERINFOSIZE and RTLD_DI_SERINFO requests.

When allocating TLS and DTV, make sure that any unused slots in the DTV

2005-03-30T08:28:26+00:00

are initialised to zero. When freeing TLS, don't attempt to free DTV
slots which were not used.

Pointed out by: Joerg Sonnenberger
X-MFC-After: After the branch, probably

If "dangerous" environment variables (LD_PRELOAD, LD_LIBMAP,

2005-03-24T10:12:29+00:00

LD_LIBMAP_DISABLE, LD_LIBRARY_PATH) are used, then make sure the
libraries being loaded aren't on a noexec-mounted filesystem.

This is a compromise position: I'm assuming that nobody will be silly
enough to set the noexec mount flag on part of the default library
path, in order to avoid adding extra overhead into the common case
(where those environment variables aren't used).

Discussed with:	csjp, secteam
MFC after:	1 week

Add locking code for tls routines.

2005-03-20T23:28:25+00:00

Attempt to free any static TLS space used by a shared library when it

2005-02-27T12:55:40+00:00

is unloaded. This allows applications which load and unload libraries
like libGL.so.1 several times to work properly.

MFC after: 2 days

Description from Dan:

2005-02-04T02:46:41+00:00

	Another handy libmap patch.  Lets you do stuff like this:

	LD_LIBMAP="libpthread.so.1=libthr.so.1" mythreadedapp

	If you already have a program-specific override in libmap.conf, note
	that you must use a program-specific override in LD_LIBMAP:

	LD_LIBMAP="[mythreadedapp],libpthread.so.1=libthr.so.1" mythreadedapp

PR:		bin/74471
Submitted by:	Dan Nelson 
MFC after:	2 weeks

Do the TLS offset allocations before relocations, as otherwise there

2004-11-02T09:42:21+00:00

can be overlap in the TLS offsets, if the relocations are done in a
certain order.

Approved by:	dfr, grehan (mentor)

Add stubs for TLS.

2004-09-23T23:04:52+00:00

Arbitraly choose the 2nd variant until I figure out which one I should use.

Add stubs for powerpc TLS.

2004-08-04T19:12:14+00:00

Submitted by: ssouhlal