Commit Graph

71 Commits

Author SHA1 Message Date
Mark Johnston
a94a4b74bd Pass variables prefixed with both LD_ and LD_32_ to the run-time linker.
This prevents unintentional execution of programs when running ldd(1) on
32-bit Linux binaries.

PR:		175339, 127276
Suggested by:	kib, rstone
Reviewed by:	kib
MFC after:	2 weeks
2013-08-07 00:28:17 +00:00
Ben Laurie
5f301949ef Fix clang warnings.
Approved by:	philip (mentor)
2011-06-18 13:56:33 +00:00
Rebecca Cran
70557f4f83 hdr.elf.e_ident[EI_OSABI] is not a bitmask so '==' should been used.
Reported by: Artem Belevich <fbsdlist at src.cx>
2010-11-22 20:18:46 +00:00
Warner Losh
25faff346c MFtbemd:
Prefer MACHNE_CPUARCH to MACHINE_ARCH in most contexts where you want
to test of all the CPUs of a given family conform.
2010-08-23 22:24:11 +00:00
Ed Schouten
b7946da96b Build usr.bin/ with WARNS=6 by default.
Also add some missing $FreeBSD$ to keep svn happy.
2010-01-02 10:27:05 +00:00
Daniel Gerzo
a2ec746f79 - correctly render the provided example
PR:		docs/140962
Submitted by:	mharo
2009-11-28 11:05:22 +00:00
John Baldwin
52122f3139 A few style and whitespace fixes.
Submitted by:	bde
2008-08-02 12:04:59 +00:00
John Baldwin
e68ed79390 Tweak the support for using ldd on 32-bit objects a bit further.
Specifically, build a 32-bit /usr/bin/ldd32 on amd64 which handles 32-bit
objects.  Since it is a 32-bit binary, it can fork a child process which
can dlopen() a 32-bit shared library.  The current 32-bit support in ldd
can't do this because it does the dlopen() from a 64-bit process.  In order
to preserve an intuitive interface for users, the ldd binary automatically
execs /usr/bin/ldd32 for 32-bit objects.  The end result is that ldd on
amd64 now transparently handles 32-bit shared libraries in addition to
32-bit binaries.

Submitted by:	ps (indirectly)
2008-08-01 21:52:41 +00:00
Edwin Groothuis
bff7135050 Fix text in the comment why we check for ELF32_R_TYPE
Approved by:	bde@
MFC after:	2 days2 days
2008-07-28 12:49:16 +00:00
Edwin Groothuis
8bd833fff8 After the commit of SVN rev 180236, wilko@ noticed that the approach
doesn't work on the Alpha platform: machine/elf.h doesn't include
sys/elf32.h there.

PR:		related to bin/124906
Approved by:	bde@
MFC after:	1 week
2008-07-21 02:13:14 +00:00
Edwin Groothuis
fffd993df2 On 64 bit architectures, you can run 32 bit executables and the rtld can trace them, but ldd(1) doesn't know yet how to detect them:
[/] root@ed-exigent>ldd `which httpd`
    ldd: /usr/local/sbin/httpd: can't read program header
    ldd: /usr/local/sbin/httpd: not a dynamic executable

    But...

    [/] root@ed-exigent>LD_32_TRACE_LOADED_OBJECTS==1 `which httpd`
    libm.so.4 => /lib32//libm.so.4 (0x280c8000)
    libaprutil-1.so.2 => /usr/local/lib/libaprutil-1.so.2 (0x280de000)
    libexpat.so.6 => /usr/local/lib/libexpat.so.6 (0x280f2000)
    libiconv.so.3 => /usr/local/lib/libiconv.so.3 (0x28110000)
    libapr-1.so.2 => /usr/local/lib/libapr-1.so.2 (0x281fd000)
    libcrypt.so.3 => /lib32//libcrypt.so.3 (0x2821d000)
    libpthread.so.2 => not found (0x0)
    libc.so.6 => /lib32//libc.so.6 (0x28235000)
    libpthread.so.2 => /usr/lib32/libpthread.so.2 (0x2830d000)

Added support in ldd(1) for the LD_32_xxx environment variables if
the architecture of the machine is >32 bits. If we ever go to 128
bit architectures this excercise will have to be repeated but thanks
to earlier commits today it will be relative simple.

PR:		bin/124906
Submitted by:	edwin
Approved by:	bde (mentor)
MFC after:	1 week
2008-07-03 22:37:51 +00:00
Edwin Groothuis
d3c1e14b41 Extract the determination of the kind of (dynamic) executable from
the main-loop into a seperate function.
Instead of using hardcoded environment variables, define them in a
lookup table.
For the rest, no functionality changes.

Approved by:	bde (mentor)
MFC after:	1 week
2008-07-03 22:30:18 +00:00
Edwin Groothuis
a0d476a986 stylify ldd.c, no functional changes.
Approved by:	bde (mentor)
MFC after:	1 week
2008-07-03 22:26:43 +00:00
Bruce M Simpson
7fa21c09b6 Typo 2008-05-15 10:51:30 +00:00
Bruce M Simpson
b65a4e880e Add an example of how to use ldd -f. 2008-05-15 10:43:11 +00:00
Pav Lucistnik
0e2dd92370 Expand documentation of -f option
PR:		docs/66265
Submitted by:	Michel Lavondes <fox@vader.aacc.cc.md.us>
MFC after:	1 week
2007-05-12 12:23:40 +00:00
David Malone
a1e5be4482 The type of some aout header types changed to uint_32, so now we need
to cast to long before printing. While I'm here, raise WARNS to 6.
2004-06-29 21:13:15 +00:00
David Malone
10f106f5fd Fix a few WARNS:
1) Include string.h for strcpy.
2) Don't make duplicate declaration of dump_file, we now include extern.h.
3) Help out with some constness.
4) Cast to slightly better types in some comparisons.
2004-02-15 22:01:23 +00:00
Jens Schweikhardt
d64ada501a Fix typos, mostly s/ an / a / where appropriate and a few s/an/and/
Add FreeBSD Id tag where missing.
2002-12-30 21:18:15 +00:00
Maxim Sobolev
d1cf9ea2c4 Fix a problem with RTLD_TRACE flag to dlopen(3), which sometimes can return
even if there was no error occured (when trying to dlopen(3) object that
already linked into executable which does dlopen(3) call). This is more
proper fix for `ldd /usr/lib/libc.so' problem, because the new behaviour
conforms to documentation.

Remove workaround from ldd.c (rev.1.32).

PR:		35099
Submitted by:	Nathan Hawkins <utsl@quic.net>
MFC after:	1 week
2002-10-19 10:18:29 +00:00
Peter Wemm
66422f5b7a Initiate deorbit burn for the i386-only a.out related support. Moves are
under way to move the remnants of the a.out toolchain to ports.  As the
comment in src/Makefile said, this stuff is deprecated and one should not
expect this to remain beyond 4.0-REL.  It has already lasted WAY beyond
that.

Notable exceptions:
gcc - I have not touched the a.out generation stuff there.
ldd/ldconfig - still have some code to interface with a.out rtld.
old as/ld/etc - I have not removed these yet, pending their move to ports.
some includes - necessary for ldd/ldconfig for now.

Tested on: i386 (extensively), alpha
2002-09-17 01:49:00 +00:00
Akinori MUSHA
005ba515dc Fix a tiny bug in shlib support of ldd(1); if dlopen(lib, RTLD_TRACE)
returns, exit gracefully with 0.

This fixes the behavior you see when you specify libc.so.  It occurs
because ldd(1) itself is linked with libc.so.

	$ ldd /usr/lib/libc.so
	/usr/lib/libc.so:
	ldd: /usr/lib/libc.so: (null)
	/usr/lib/libc.so: exit status 1

Reviewed by:	silence of audit@
2002-05-17 17:06:56 +00:00
Mark Murray
a53809fd7e Warns; ANSIfy, constify and move declarations into a common header. 2002-04-28 12:55:35 +00:00
Mark Murray
f5b7af34dd Remove GCC-specific flags. 2002-04-28 12:54:24 +00:00
Mike Barcroft
a2cfdda8d7 Include <arpa/inet.h> for prototype of ntohl() used in the N_BADMAG()
macro.
2002-04-20 20:09:29 +00:00
Philippe Charnier
e8937ba009 Use `The .Nm utility' 2002-04-20 12:18:28 +00:00
Warner Losh
f1bb2cd2aa remove __P 2002-03-22 01:22:50 +00:00
Ruslan Ermilov
ba68dbe5f9 mdoc(7) police: kill hard sentence breaks. 2002-03-15 15:31:54 +00:00
David E. O'Brien
2024994319 Add support such that if LD_TRACE_LOADED_OBJECTS_ALL is defined to a
non-empty string in the environment; we indicate which objects caused
each object to be loaded.

PR:		30908
Submitted-by:	Mike Meyer <mwm@mired.org>
2002-02-17 07:04:32 +00:00
Maxim Sobolev
97b79abc86 Inspect ELF header and reject any non-FreeBSD shared objects.
MFC after:	2 weeks
2002-02-08 04:08:57 +00:00
Maxim Sobolev
c6de4ce791 Allow ldd(1) be used on shared libraries in addition to executables. 2002-02-04 10:33:48 +00:00
Maxim Sobolev
fc41545e4e GC meaningless assignment.
MFC after:	3 days
2002-02-04 10:23:23 +00:00
Matthew Dillon
54109b3e31 Fix long format mismatch with int arg 2001-10-29 00:32:58 +00:00
Ruslan Ermilov
625003720a mdoc(7) police: removed HISTORY info from the .Os call. 2001-07-10 14:16:33 +00:00
Brian Somers
7bc6d0158f Fix the type of the NULL arg to execl()
Idea from: Theo de Raadt <deraadt@openbsd.org>
2001-07-09 09:24:06 +00:00
David E. O'Brien
5e6220d9d0 * include/elf.h has been repo copied to include/elf-hints.h, and it no
longer includes machine/elf.h.
* consumers of elf.h now use the minimalist elf header possible.

This change is motivated by Binutils 2.11.0 and too much clashing over
our base elf headers and the Binutils elf headers.
2001-05-02 23:56:21 +00:00
Andrey A. Chernov
e6f0df2b20 Fix lseek args order (PR 23549)
Catch and report lseek errors too
While reading header don't attempt to continue reading
if some IO operation fails

PR:		23549
2000-12-15 13:20:43 +00:00
Philippe Charnier
3e7626264d Add rcsid. Remove unused #include. Remove error() definition and replace
with warn().
2000-12-10 20:54:13 +00:00
Ruslan Ermilov
8fe908ef0c mdoc(7) police: use the new features of the Nm macro. 2000-11-20 19:21:22 +00:00
Warner Losh
62f882d620 getopt and friends are declared in <unistd.h>
getopt returns -1 not EOF.
2000-09-04 06:09:54 +00:00
Alexey Zelkin
b51a864598 Corractly use .Nm and .An/.Aq macros. Replace FreeBSD with .Fx macro
e.
2000-05-10 15:46:27 +00:00
Sheldon Hearn
35add0e9a7 Cross-reference ldd(1) in rtld(1) and vice versa. 2000-03-28 09:01:04 +00:00
Sheldon Hearn
7a3de7619d Revert the part of rev 1.5 that spammed rev 1.4; rev 1.4 correctly
removed an erroneous cross-reference to ld.so(1), which doesn't
exist in FreeBSD.

PR:		17468
Submitted by:	Randall Hopper <aa8vb@ipass.net>
2000-03-20 13:30:11 +00:00
Sheldon Hearn
87faa07bec Remove single-space hard sentence breaks. These degrade the quality
of the typeset output, tend to make diffs harder to read and provide
bad examples for new-comers to mdoc.
2000-03-01 12:20:22 +00:00
Mike Pritchard
49364d3cb3 Add $FreeBSD$ lines to man pages that are missing them to make it
easier for translation teams.

PR:		docs/13418
Submitted by:	Alexey Zelkin <phantom@cris.net>
1999-08-28 23:23:38 +00:00
Peter Wemm
c3aac50f28 $Id$ -> $FreeBSD$ 1999-08-28 01:08:13 +00:00
Doug Rabson
97db68b61b Make ldd work on alpha. 1998-09-16 09:31:48 +00:00
John Polstra
e2daa140cc Fix a bug which caused ldd to execute scripts listed on its command
line, instead of skipping them.

Also make a few minor cleanups.

PR:		bin/7783
1998-08-30 18:30:59 +00:00
Peter Wemm
932d41914f Add -DFREEBSD_AOUT to CFLAGS to ensure we get the correct definitions
from <link.h>
1998-06-12 14:11:15 +00:00
Peter Wemm
a7ef806899 ldd standalone build, after repository copy. 1998-06-01 13:55:12 +00:00