Konstantin Belousov bca2f6239d Import the DragonFly BSD commit 4f0bc915b65fcf5a23214f6d221d65c80be68ad4 ... by John Marino <draco@marino.st>, with the following (edited) commit message Date: Sat, 24 Mar 2012 06:40:50 +0100 Subject: [PATCH 1/1] rtld: Implement DT_RUNPATH and -z nodefaultlib DT_RUNPATH is incorrectly being considered as an alias of DT_RPATH. The purpose of DT_RUNPATH is to have two different types of rpath: one that can be overridden by the environment variable LD_LIBRARY_PATH and one that can't. With the currently implementation, LD_LIBRARY_PATH will always trump any embedded rpath or runpath tags. Current path search order by rtld: ================================== LD_LIBRARY_PATH DT_RPATH / DT_RUNPATH (always the same) ldconfig hints file (default: /var/run/ld-elf.so.hints) /usr/lib New path search order by rtld: ============================== DT_RPATH of the calling object if no DT_RUNPATH DT_RPATH of the main binary if no DT_RUNPATH and binary isn't calling obj LD_LIBRARY_PATH DT_RUNPATH ldconfig hints file /usr/lib The new path search matches how the linux runtime loader works. The other major added feature is support for linker flag "-z nodefaultlib". When this flag is passed to the linker, rtld will skip all references to the standard library search path ("/usr/lib" in this case but it could handle more color delimited paths) except in DT_RPATH and DT_RUNPATH. New path search order by rtld with -z nodefaultlib flag set: ============================================================ DT_RPATH of the calling object if no DT_RUNPATH DT_RPATH of the main binary if no DT_RUNPATH and binary isn't calling obj LD_LIBRARY_PATH DT_RUNPATH ldconfig hints file (skips all references to /usr/lib) FreeBSD notes: - we fixed some bugs which were submitted to DragonFly and merged there as commit 1ff8a2bd3eb6e5587174c6a983303ea3a79e0002; - we added LD_LIBRARY_PATH_RPATH environment variable to switch to the previous behaviour of considering DT_RPATH a synonym for DT_RUNPATH; - the FreeBSD default search path is /lib:/usr/lib and not /usr/lib. Reviewed by: kan MFC after: 1 month MFC note: flip the ld_library_path_rpath default value for stable/9		2012-07-15 10:53:48 +00:00
..
atrun
bootpd	Make sure sections are sorted into conventional order.	2012-03-25 16:00:56 +00:00
comsat	Make comsat(8) approximately 15% smaller.	2011-12-10 18:35:26 +00:00
fingerd
ftpd	Spelling fixes for libexec/	2012-01-07 16:09:54 +00:00
getty	mdoc: terminate quoted strings.	2012-03-26 15:18:14 +00:00
lukemftpd	Spelling fixes for libexec/	2012-01-07 16:09:54 +00:00
mail.local	Define several extra macros in bsd.sys.mk and sys/conf/kern.pre.mk, to	2012-02-28 18:30:18 +00:00
mknetid	Replace index() and rindex() calls with strchr() and strrchr().	2012-01-03 18:51:58 +00:00
pppoed	In libexec/pppoed/pppoed.c, use the correct printf length modifier for a	2011-12-16 16:07:39 +00:00
rbootd	mdoc: fix .Bl -offset.	2012-05-23 20:22:09 +00:00
revnetgroup	Spelling fixes for libexec/	2012-01-07 16:09:54 +00:00
rlogind	Replace index() and rindex() calls with strchr() and strrchr().	2012-01-03 18:51:58 +00:00
rpc.rquotad
rpc.rstatd
rpc.rusersd
rpc.rwalld	add __unused	2010-12-19 13:05:17 +00:00
rpc.sprayd
rshd	None of these programs actually use auth.conf.	2012-06-11 16:18:39 +00:00
rtld-aout	Spelling fixes for libexec/	2012-01-07 16:09:54 +00:00
rtld-elf	Import the DragonFly BSD commit 4f0bc915b65fcf5a23214f6d221d65c80be68ad4	2012-07-15 10:53:48 +00:00
save-entropy
smrsh	Define several extra macros in bsd.sys.mk and sys/conf/kern.pre.mk, to	2012-02-28 18:30:18 +00:00
talkd	Remove unneeded use of struct timezone.	2010-08-08 02:45:48 +00:00
tcpd
telnetd
tftp-proxy
tftpd	mdoc: Only use macros inside a reference block.	2012-05-23 20:29:16 +00:00
ulog-helper	Do a better job at determining the username of the login session.	2012-04-19 21:12:08 +00:00
ypxfr	Consistently set RPCGEN_CPP when running rpcgen, so the C preprocessor	2012-02-07 09:27:07 +00:00
Makefile
Makefile.inc