Commit Graph

121 Commits

Author SHA1 Message Date
John Polstra
cefbc49679 Handle dlsym(NULL, ...) properly, by searching in the caller's
shared object.  Note, this searches _only_ that object, and not its
needed objects, in accordance with the documentation.

Also fix dlopen(NULL, ...) so that the executable's needed objects
are searched as well as the executable itself.
1998-09-02 01:09:34 +00:00
John Birrell
1eab1be09e Update this header to use the revamped elf headers which select Elf32
or Elf64 based on the inclusion of the machine dependent header.

I've left the addition of the extra fields to handle the relocation
structures with addend for a separate commit after jdp has had a chance
to review what I've done. The current change is needed to compile
csu/alpha/crt1.c
1998-08-21 03:29:40 +00:00
John Polstra
9d5aee94a0 Add "-C" to INSTALLFLAGS to install atomically. An elf->elf
installworld dies at this point otherwise, leaving the system
without a dynamic linker.
1998-08-17 04:59:15 +00:00
Doug Rabson
46066cf144 Add support for ldd. 1998-05-01 08:39:27 +00:00
Doug Rabson
2001f720ce Add GDB support. The method and some of the code came from NetBSD's elf
runtime linker.
1998-04-30 07:48:02 +00:00
John Polstra
3124c3e093 Import the ELF dynamic linker. This is the ElfKit version with
quite a few enhancements and bug fixes.  There are still some known
deficiencies, but it should be adequate to get us started with ELF.

Submitted by:	John Polstra <jdp@polstra.com>
1998-03-07 19:24:35 +00:00
Wolfram Schneider
f6b31571f6 spelling corrections.
PR: docs/4450
Submitted by: josh@quick.net
1997-09-13 16:01:53 +00:00
Masafumi Max NAKANE
d5fb0dffb4 Typo fix.
PR:		3693
Submitted by:	Kazuo Horikawa <k-horik@yk.rim.or.jp>
1997-05-27 13:46:40 +00:00
Peter Wemm
fce15c9ab3 Revert $FreeBSD$ to $Id$ 1997-02-22 15:48:31 +00:00
John Polstra
ac6c268b3d Pay attention to the environment variable "LD_IGNORE_MISSING_OBJECTS".
If it is set to a nonempty string, then simply skip any missing
shared libraries.  This came up in a discussion long ago as a
potentially useful feature at sysinstall time.  For example, an
X11 utility could be used without the X libraries being present,
provided the utility had a mode in which no X functions were actually
called.
1997-01-17 20:22:18 +00:00
Jordan K. Hubbard
1130b656e5 Make the long-awaited change from $Id$ to $FreeBSD$
This will make a number of things easier in the future, as well as (finally!)
avoiding the Id-smashing problem which has plagued developers for so long.

Boy, I'm glad we're not using sup anymore.  This update would have been
insane otherwise.
1997-01-14 07:20:47 +00:00
Wolfram Schneider
af20215665 Sort cross references. 1997-01-13 00:25:51 +00:00
John Polstra
aeea55e459 Correct typos and spelling errors. 1997-01-12 00:19:14 +00:00
John Polstra
0db65949ae Add support for the LD_BIND_NOW environment variable. If it is set to a
nonempty string, then function calls are relocated at program start-up
rather than lazily.  This variable is standard on Sun and SVR4 systems.

The dlopen() function now supports both lazy and immediate binding, as
determined by its "mode" argument, which can be either 1 (RTLD_LAZY) or
2 (RTLD_NOW).  I will add defines of these symbols to <dlfcn.h> as soon
as I've done a little more checking to make sure they won't cause
collisions or bootstrapping problems that would break "make world".

The "LD_*" environment variables which alter dynamic linker behavior are
now treated as unset if they are set to the empty string.  This agrees
with the standard SVR4 conventions for the dynamic linker.

Add a work-around for programs compiled with certain buggy versions of
crt0.o.  The buggy versions failed to set the "crt_ldso" member of the
interface structure.  This caused certain error messages from the
dynamic linker to begin with "(null)" instead of the pathname of the
dynamic linker.
1997-01-12 00:16:36 +00:00
Steven Wallace
43d7fd0390 Fix spelling error in manpage. 1996-12-26 21:51:09 +00:00
John Polstra
16804804df Fix two minor typos in the manual page. 1996-10-18 04:49:43 +00:00
Peter Wemm
5584286a91 Update to handle new version ld.so.hints and info in executable for
configurable fallback search paths, as well as new crt interface version.

Also:
 - even faster getenv(), get all environment variable settings in a single
   pass.
 - ldd printf-like format specifications
 - minor code cleanups, one vsprintf -> vsnprintf (harmless)

The library search sequence is a little more complete now. Before,
it'd search $LD_LIBRARY_PATH (by opendir/readdir/closedir), then read
the hints file, then read /usr/lib (again by scanning thr directory).  It
would then fail if there was no "found" library.

Now, it does LD_LIBRARY_PATH and the hints file the same, but then uses
a longer fallback path.  The -R path is fetched from the executable if
specified at build time, the ldconfig path is appended, and /usr/lib is
appended to that. Duplicates are suppressed.  This means that simply
placing a new library in /usr/local/lib will work (the same as it did in
/usr/lib) without needing ldconfig -m.  It will find it quicker if the
ldconfig is run though.

Similar changes have been made to the NetBSD ld.so, but ours is rather
different now due to John Polstra's speedups and fixes from a while back.

The ldd printf-like format support came direct from NetBSD.

Reviewed by: nate, jdp
1996-10-01 01:52:03 +00:00
Wolfram Schneider
e0e5145ce6 add missing comma(s) in .Xr macros 1996-09-23 22:24:39 +00:00
John Polstra
dd2b076850 Implement support for LD_PRELOAD in the dynamic linker. Remove
descriptions of LD_NO_INTERN_SEARCH and LD_NOSTD_PATH from the manual
page, since they are not supported.

Submitted by:	Doug Ambrisko <ambrisko@ambrisko.roble.com>
1996-04-20 18:29:50 +00:00
Nate Williams
c68c38c86b This is a FreeBSD manpage, not a NetBSD manpage. :) 1995-10-05 05:16:52 +00:00
Joerg Wunsch
19d57e6d9d Import Paul Kranenburg's man page for ld.so (aka. rtld).
Obtained from:	NetBSD
1995-08-26 13:17:39 +00:00