Commit Graph

399 Commits

Author SHA1 Message Date
John Birrell
1566f9a7f9 Include an extra header to get a function prototype. 2007-11-19 08:58:11 +00:00
Marius Strobl
77ddefb873 - Fix the handling of R_SPARC_OLO10, which is a bit of a special case
in the way we implement handling of relocations.
  As for the kernel part this fixes the loading of lots of modules,
  which failed to load due to unresolvable symbols when built after
  the GCC 4.2.0 import. This wasn't due to a change in GCC itself
  though but one of several changes in configuration done along the
  import. Specfically, HAVE_AS_REGISTER_PSEUDO_OP, which causes GCC
  to denote global registers used for scratch purposes and in turn
  GAS uses R_SPARC_OLO10 relocations for, is now defined.
  While at it replace some more ELF_R_TYPE which should have been
  ELF64_R_TYPE_ID but didn't cause problems so far.
- Sync a sanity check between kernel and rtld(1) and change it to be
  maintenance free regarding the type used for the lookup table.
- Sprinkle const on lookup tables.
- Use __FBSDID.

Reported and tested by:	yongari
MFC after:		5 days
2007-10-16 19:17:48 +00:00
Marcel Moolenaar
99227f1ec4 Unbreak the dynamic linker by not creating a cache for rtld-elf
itself. It needs mmap(2), which now needs getosreldate(3) and
which in turn uses a global variable to cache the result. This
cannot be done before linking is done.

See also: ../sparc64/reloc.c:1.15
Approved by: re (kensmith)
2007-07-15 22:52:15 +00:00
Ken Smith
6e5e629f07 Cache does not serve any purpose when rtld is relocating itself, do
not bother allocating one.

Submitted by:	kan
Approved by:	re (bmah)
2007-07-13 16:18:43 +00:00
Alexander Kabaev
03c4fb02dd Add r_debug_state to the list of symbols exported from rtld. GDB needs to
be able to find it in order to trap shared library events from rtld.

Approved by:	re (rwatson)
2007-07-11 23:07:37 +00:00
Christian S.J. Peron
b075897e99 Update the man page to reflect that certain variables will be unset in
the case that the program is set-user-ID or set-group-ID. Add missing
annotations for LIBMAP and LIBMAP_DISABLE.
2007-05-17 19:14:25 +00:00
Christian S.J. Peron
d61e5aa4ed In the event a process is tainted (setuid/setgid binaries), un-set any
potentially dangerous environment variables all together. It should be
noted that the run-time linker will not honnor these environment variables
if the process is tainted currently. However, once a child of the tainted
process calls setuid(2), it's status as being tainted (as defined by
issetugid(2)) will be removed. This could be problematic because
subsequent activations of the run-time linker could honnor these
dangerous variables.

This is more of an anti foot-shot mechanism, there is nothing I am
aware of in base that does this, however there may be third party
utilities which do, and there is no real negative impact of clearing
these environment variables.

Discussed on:	secteam
Reviewed by:	cperciva
PR:		kern/109836
MFC after:	2 weeks
2007-05-17 18:00:27 +00:00
Marcel Moolenaar
cc09c7fb77 Don't enable symbol versioning on ia64 for now. It causes
symbol lookup failures that later result in null-pointer
dereferences. This needs looking into, but since we're
close to release it's possible that it's not resolved before
that time.
2007-05-16 23:24:15 +00:00
Marcel Moolenaar
878dd988ef We don't need --export-dynamic for ld-elf.so.1, because it's a
shared object.
2007-05-16 23:19:51 +00:00
Daniel Eischen
00fb440c1a Enable symbol versioning by default. Use WITHOUT_SYMVER to disable it.
Warning, after symbol versioning is enabled, going back is not easy
(use WITHOUT_SYMVER at your own risk).

Change the default thread library to libthr.

There most likely still needs to be a version bump for at least the
thread libraries.  If necessary, this will happen later.
2007-05-13 14:12:40 +00:00
Pav Lucistnik
88922cf00e Remove %m formatter, it's ifdef 0'ed in the code from the very beginning
MFC after:	1 week
2007-05-12 12:26:25 +00:00
Pav Lucistnik
b9e1d83e61 Expand documentation for LD_TRACE_LOADED_OBJECTS_FMT? variables
PR:		docs/66265 (inspired by)
Submitted by:	Michel Lavondes <fox@vader.aacc.cc.md.us>
MFC after:	1 week
2007-05-12 12:24:49 +00:00
David Xu
25785f9165 Fix a TLS memory leak.
PR: threads/112297
MFC: 1 week
2007-05-05 08:44:59 +00:00
Daniel Eischen
7046601eca Catch up with the private namespace change (s/FBSDprivate/FBSDprivate_1.0). 2007-05-01 13:46:27 +00:00
Alexander Kabaev
effa5b4e71 Retire rtld-specific Versions.def. Symbols exported by rtld are supposed
to override weak symbols exported by libc, so by definition these two
are using the same symbol version names.

Reflect the reality by referring to libc's Versions.def directly.
2007-04-29 16:12:06 +00:00
Daniel Eischen
b5a71dda23 Give the private version namespace a number to match libc. 2007-04-29 14:16:19 +00:00
Daniel Eischen
5f864214bb Use C comments since we now preprocess these files with CPP. 2007-04-29 14:05:22 +00:00
Alexander Kabaev
3c0d0ca74b Bring rtld exports in line with corresponding symbols exported from
libc.

Disable SYMVER_DEFAULT n rtld until its implications are understood
better.
2007-04-09 23:00:29 +00:00
Alexander Kabaev
95a6a22d0a Remove reference to FBSDprivate version. We do not use it in this
module yet.
2007-04-07 23:23:10 +00:00
Alexander Kabaev
ac34654dd9 Catch up on rtld's special status. Since it does not appear on
main object list, its versioning information needs to be examined
separately.

This hopefully fixes problems that people running with SYMVER_ENABLED
are experiencing.
2007-04-07 23:17:00 +00:00
Alexander Kabaev
7ca8e6a670 Prepare rtld for symbol versioning. Disable it by default for now. 2007-04-03 19:01:06 +00:00
Alexander Kabaev
49f90ad282 Implement dl_iterate_phdr function.
Convert boolean flags in internal Obj_Entry structure into bitfields.
Properly check for loaded segment alignment in map_object.
2007-04-03 18:31:20 +00:00
Alexander Kabaev
fb6395da91 Use u_int for variable manipulated by atomic ops to match atomic
ops function prototypes.
2007-04-03 18:28:13 +00:00
John Baldwin
f0ac0f92fb Document LD_UTRACE.
MFC after:	3 days
2007-01-23 22:38:39 +00:00
John Baldwin
1f4b63f824 Add various utrace's for use with ktrace to the ELF runtime linker. To
activate the traces, set the LD_UTRACE (or LD_32_UTRACE) environment
variable.  This also includes code in kdump(8) to parse the traces.

Reviewed by:	kan, jdp
MFC after:	2 weeks
2007-01-09 17:50:05 +00:00
Kip Macy
b84c7a797c Fix TLS on sparc64 for statically and dynamically linked binaries
Approved by: rwatson (mentor)
Reviewed by: jmg and marcel
2006-10-08 02:50:34 +00:00
Jung-uk Kim
da7bf2bb26 Clean up white spaces and fix style(9). 2006-09-19 16:48:08 +00:00
Konstantin Belousov
5fd885b07b Fix the buggy rev. 1.117. dagmembers are only initialized for dlopen'ed
dso that are actually loading. If dso a.so depends on b.so, then dlsym
with handle from dlopen("b.so") will fail unconditionally.

Correct implementation shall use the Obj_Entry.needed list to walk
dependencies DAG.

Test provided by: jkim
Tested (prev. version) by:	jkim, Nicolas Blais <nb_root at videotron ca>, h.blanke at chello nl
Pointy hat to:	kib
Approved by:	kan (mentor)
2006-09-19 12:47:13 +00:00
Ruslan Ermilov
a3ec17db37 Markup fixes. 2006-09-17 21:48:47 +00:00
Konstantin Belousov
d0cb0064fe When looking up the symbol by dlsym, look it not only in the object
given as dso handle, but also in the implicit dependencies of that dso.

Also, const-ify the read-only parameter objlist of symlook_list.

Reported by:	"Simon 'corecode' Schubert" <corecode at fs ei tum de>
Approved by:	kan (mentor)
X-MFC-After:	6.2
2006-09-08 14:59:54 +00:00
Marcel Moolenaar
3614156c7d Fix the variant I allocation for KSE: Allow a larger TCB and assume
that the documented TCB is at the tail of the extended TCB. In other
words, the base of the TCB has a negative offset from the TLS.
2006-09-01 06:13:16 +00:00
Marcel Moolenaar
9d34b1a911 o Fix the static TLS relocation. We were subtracting the size of
the TCB.
o  Use NULL for null pointer argument.
o  Replace magic 8 with TLS_TCB_SIZE.
2006-09-01 06:08:50 +00:00
Marcel Moolenaar
653d825a9a Use NULL for null-pointer argument. 2006-09-01 06:07:26 +00:00
Marcel Moolenaar
862894168d Replace magic 16 with TLS_TCB_SIZE. 2006-08-31 19:42:39 +00:00
Marcel Moolenaar
7d3f85133a Prevent dead code elimination for the TP assignmient by using inline
assembly.
2006-08-30 00:39:07 +00:00
Ruslan Ermilov
2b46c64c9c Remove alpha left-overs. 2006-08-22 08:03:01 +00:00
Xin LI
c93b8edf09 In symlook_obj(): fix _rtld_error output.
MFC After:	2 weeks
2006-08-04 13:37:54 +00:00
Dag-Erling Smørgrav
4421d895a9 *thwack*! all the world's not i386.
Pointy hat to:	des
2006-03-29 12:29:01 +00:00
Dag-Erling Smørgrav
370e5ea48c Don't use dbg if it isn't defined (such as when this file is used by
code outside of rtld-elf)
2006-03-28 18:28:07 +00:00
Dag-Erling Smørgrav
1dc39023f8 Use C99's varadic macro syntax instead of gcc's. 2006-03-28 18:26:47 +00:00
David Xu
c771787169 Er, forgot to clear tls space to zero for Variant II. 2006-03-28 06:14:22 +00:00
David Xu
c0d2338cdd Allocate space for thread pointer, this allows thread library to access
its pointer from begin, and simplifies _get_curthread() in libthr.
2006-03-28 06:09:24 +00:00
Pav Lucistnik
8a50f51b1b - Document LD_32_* environment variables
- Mention 32-bit files in FILES section

MFC after:	1 week
2006-03-27 00:53:58 +00:00
Peter Wemm
8c6a035ead Fix a malloc overrun in 32-bit compat libmap lookup code. 2006-01-31 06:08:28 +00:00
Marcel Moolenaar
05157fa0a1 s/DT_IA64_PLT_RESERVE/DT_IA_64_PLT_RESERVE/ 2006-01-28 17:58:22 +00:00
Marcel Moolenaar
4af16b88cc s/R_IA64_/R_IA_64_/ 2006-01-28 17:56:16 +00:00
Marcel Moolenaar
853b7411b6 s/R_IA64_/R_IA_64_/g as per the ia64 psABI. 2006-01-17 21:03:22 +00:00
Jason Evans
52828c0e9c In preparation for a new malloc implementation:
* Add posix_memalign().

  * Move calloc() from calloc.c to malloc.c.  Add a calloc() implementation in
    rtld-elf in order to make the loader happy (even though calloc() isn't
    used in rtld-elf).

  * Add _malloc_prefork() and _malloc_postfork(), and use them instead of
    directly manipulating __malloc_lock.

Approved by:	phk, markm (mentor)
2006-01-12 07:28:21 +00:00
Alexander Kabaev
96ff9a2bf4 Make lookups for relocations from old unversioned binaries return
oldest versioned symbol available. Do not accept hidden symbols for
all other versions.

Use "<obj->path>: <error message>" for all error messages in new
functions to make them more consistent.
2005-12-24 15:37:30 +00:00
Alexander Kabaev
b80d39d0c0 Remove debugging statement that slipped into lone of the previous commits
unintentionally.
2005-12-23 15:30:53 +00:00
Alexander Kabaev
f6e5db226f Initialize object dagmembers list before checking version dependencies. 2005-12-22 16:42:38 +00:00
Alexander Kabaev
0eb88f2029 Implement ELF symbol versioning using GNU semantics. This code aims
to be compatible with symbol versioning support as implemented by
GNU libc and documented by http://people.redhat.com/~drepper/symbol-versioning
and LSB 3.0.

Implement dlvsym() function to allow lookups for a specific version of
a given symbol.
2005-12-18 19:43:33 +00:00
Marcel Moolenaar
757686b115 Make our ELF64 type definitions match standards. In particular this
means:
o  Remove Elf64_Quarter,
o  Redefine Elf64_Half to be 16-bit,
o  Redefine Elf64_Word to be 32-bit,
o  Add Elf64_Xword and Elf64_Sxword for 64-bit entities,
o  Use Elf_Size in MI code to abstract the difference between
   Elf32_Word and Elf64_Word.
o  Add Elf_Ssize as the signed counterpart of Elf_Size.

MFC after: 2 weeks
2005-12-18 04:52:37 +00:00
Marcel Moolenaar
55dfaa9163 Explicitly cast ELF_R_TYPE() to the right type. 2005-12-18 01:38:26 +00:00
John Baldwin
4d5fe96d68 Fix a bug in dlinfo(RTLD_DI_SERINFOSIZE) requests. For each search path
we included the length of the path in the returned size but not the length
of the associated Dl_serpath structure.  Without this fix, programs
attempting to allocate a structure to hold the search path information
would allocate too small of a buffer and rtld would overrun the buffer
while filling it via a subsequent RTLD_DI_SERINFO request.

Submitted by:	"William K. Josephson" wkj at morphisms dot net
Reviewed by:	jdp
MFC after:	2 weeks
2005-11-11 19:57:41 +00:00
Peter Wemm
3b4399f6a7 Clean out the leftovers from the i386_set_gsbase() TLS conversion.
Like on libthr, there is an i386_set_gsbase() stub implementation here
to avoid libc.so.5 issues.  This should likely be a weak symbol and I
expect this will be fixed soon.

Approved by:	re
2005-06-29 23:15:36 +00:00
Ruslan Ermilov
cc4fdb1de9 Removed trailing whitespace.
Approved by:	re (blanket)
2005-06-14 08:41:11 +00:00
Marius Strobl
8698905073 MFNetBSD: src/libexec/ld.elf_so/arch/sparc64/mdreloc.c 1.26 (partial)
Fix an obvious bug in the 64-bit PLT fixup: the SLLX was by 12 bits, when
it should be 32.

MFC after:	1 month
2005-06-04 20:49:15 +00:00
Marcel Moolenaar
d4337d869f Fix the load64 and store64 macros, created to handle 8-byte unaligned
loads and stores (resp.) The ldq_u and stq_u instruction mask off the
lower 3 bits of the final address before loading from or storing to
the address, so as to avoid unaligned loads and stores. They do not
themselves allow loads from or stores to unaligned addresses. Replace
the macro definitions by a packed struct dereference.

Submitted by: Richard Henderson (rth at twiddle dot net)
2005-06-02 05:34:08 +00:00
Doug Rabson
9310a53def Align the stack to a 16 byte boundary before calling _rtld so that we can
safely initialise shared libraries that use SSE in their init sections.

MFC After: 1 week
2005-05-19 07:32:42 +00:00
David Xu
9b0c632a4c Fix compilation problem. 2005-04-27 13:17:23 +00:00
Peter Wemm
8d598c0d01 Stop calling _amd64_set_gsbase() for COMPAT_32BIT. The amd64 kernel
implements i386_set_gsbase(), so there is no need for the variation.
2005-04-26 20:38:44 +00:00
Peter Wemm
8a477e0a7a Attempt to use i386_set_gsbase(), and gracefully fall back to LDT methods
if the direct access methods are not implemented.
2005-04-14 00:04:50 +00:00
Olivier Houchard
2204e78f5e No need to provide atomic_cmpset_32() anymore. 2005-04-07 22:04:49 +00:00
Doug Rabson
3709906a1d When allocating TLS and DTV, make sure that any unused slots in the DTV
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
2005-03-30 08:28:26 +00:00
Colin Percival
8fe7df9b68 If "dangerous" environment variables (LD_PRELOAD, LD_LIBMAP,
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
2005-03-24 10:12:29 +00:00
David Xu
c5fa3778bb Add locking code for tls routines. 2005-03-20 23:28:25 +00:00
Doug Rabson
ddab7ee80a Attempt to free any static TLS space used by a shared library when it
is unloaded. This allows applications which load and unload libraries
like libGL.so.1 several times to work properly.

MFC after: 2 days
2005-02-27 12:55:40 +00:00
Olivier Houchard
c6ac5bfcae Only provide the dummy, non-atomic atomic_cmpset_32() if
ARM_HAS_ATOMIC_CMPSET_32 isn't defined.
2005-02-26 22:49:19 +00:00
Matthew N. Dodd
5b08cb0449 Description from Dan:
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 <dnelson AT allantgroup.com>
MFC after:	2 weeks
2005-02-04 02:46:41 +00:00
Matthew N. Dodd
d33da23f4c style(9) 2005-02-04 02:13:37 +00:00
Olivier Houchard
25a252899e Implement a dummy atomic_cmpset_32(). It should be safe to use it in rtld as
the signals are masked anyway.
2004-11-23 16:32:34 +00:00
John Baldwin
165204a75f Remove 80386 support from the ELF run time linker. 2004-11-16 20:45:51 +00:00
Ruslan Ermilov
1b1aa7e465 So do it like we do in usr.bin/tip/tip/Makefile. ;) 2004-11-14 22:18:31 +00:00
Jens Schweikhardt
443ceb1c7e Revert previous commit. As ru explains:
In the old world (as the surrounding comment in makefile says), there
 was the /usr/libexec/ld-elf.so.1 binary which is now a symlink to
 /libexec/ld-elf.so.1. To symlink, we need to make sure that the
 _target_ (and the target is /usr/libexec/ld-elf.so.1) doesn't have
 "schg" flag set. A real solution is to protect the chflags call only if
 target exists, like we do in usr.bin/tip/tip/Makefile.

Requested by:	ru
2004-11-14 21:14:06 +00:00
Jens Schweikhardt
6ccc491b4b Avoid an (ignored) error by invoking chflags on the link target, not the
symlink.

PR:		kern/73016
Submitted by:	John E. Hein <jhein@timing.com>
MFC after:	1 week
2004-11-14 12:47:20 +00:00
John Baldwin
2939195e46 Remove these unused files before any other archs include the same bogus
file.
2004-11-12 18:05:30 +00:00
Peter Wemm
24b4ec3d21 The 32 bit compatability ld-elf32.so.1 cannot use i386_set_ldt() when
running on an amd64 kernel.  Use the recently exposed direct %fs/%gs set
routines instead for the TLS setup of 32 bit binaries.
2004-11-06 03:32:07 +00:00
Ruslan Ermilov
dee651eb15 Introduce the PRECIOUSPROG knob in bsd.prog.mk, similar
to PRECIOUSLIB from bsd.lib.mk.  The side effect of this
is making installing the world under jail(8) possible by
using another knob, NOFSCHG.

Reviewed by:	oliver
2004-11-03 18:01:21 +00:00
Suleiman Souhlal
6c2a9753f2 Implement TLS relocations for powerpc.
Approved by:	grehan (mentor)
2004-11-02 09:47:01 +00:00
Suleiman Souhlal
5bbd22ee8d Do the TLS offset allocations before relocations, as otherwise there
can be overlap in the TLS offsets, if the relocations are done in a
certain order.

Approved by:	dfr, grehan (mentor)
2004-11-02 09:42:21 +00:00
Ruslan Ermilov
a35d88931c For variables that are only checked with defined(), don't provide
any fake value.
2004-10-24 15:33:08 +00:00
Olivier Houchard
34be051190 Don't try to relocate the dynamic loader in reloc_non_plt(). It has already
been done before.
2004-09-28 14:43:12 +00:00
Olivier Houchard
0e030636cb Use add instead of saving the sp in a register. 2004-09-28 14:41:15 +00:00
Olivier Houchard
9ac88d19dc Add stubs for TLS.
Arbitraly choose the 2nd variant until I figure out which one I should use.
2004-09-23 23:04:52 +00:00
Doug Rabson
fca32c746e Add stubs for powerpc TLS.
Submitted by: ssouhlal
2004-08-04 19:12:14 +00:00
Doug Rabson
017246d02f Add support for Thread Local Storage. 2004-08-03 08:51:00 +00:00
Stefan Farfeleder
5908d366fb Consistently use __inline instead of __inline__ as the former is an empty macro
in <sys/cdefs.h> for compilers without support for inline.
2004-07-04 16:11:03 +00:00
Thomas Moestl
d05bb9a2a6 Fix the problem that surfaced with the new binutils import on sparc64
(and that is for now being worked around by a binutils patch).

The rtld code tested &_DYNAMIC against 0 to see whether rtld itself
was built as PIC or not. While the sparc64 MD code did not rely
on the preset value of the GOT slot for _DYNAMIC any more due
to previous binutils changes, it still used to not be 0, so
that this check did work. The new binutils do however initialize
this slot with 0. As a consequence, rtld would not properly initialize
itself and crash.
Fix that by introducing a new macro, RTLD_IS_DYNAMIC, to take the role
of this test. For sparc64, it is implemented using the rtld_dynamic()
code that was already there. If an architecture does not provide its
own implementation, we default to the old check.

While being there, mark _DYNAMIC as a weak symbol in the sparc64
rtld_start.S. This is needed in the LDSCRIPT case, which is however
not currently supported for want of an actual ldscript.

Sanity checked with md5 on alpha, amd64, i386 and ia64.
2004-06-18 02:01:37 +00:00
Olivier Houchard
45ab3f5350 This comment should have been removed in the previous commit.
Spotted out by: marcus, simon
2004-06-17 19:01:53 +00:00
Olivier Houchard
f77d42ce5c Woohoo !
the latest binutils import mades this gross hack useless, so just remove it.
2004-06-17 17:53:16 +00:00
Oliver Eikemeier
0a16eb8341 give out a little more information in case of a missing dependency
PR:		56549
Submitted by:	edwin
Reviewed by:	joerg, ru
Approved by:	joerg
MFC after:	2 weeks
2004-05-28 00:05:28 +00:00
Matthew N. Dodd
966efcc767 Support basename and path based constrained matches.
eg:
	[foo]
	...

	matches any executable 'foo'

	[/usr/bin/foo/]
	...

	matches any executable under the directory /usr/bin/foo/

Exact matches continue to function as before.

PR:		 bin/66769
Submitted-by:	 Dan Nelson
2004-05-24 01:24:13 +00:00
Olivier Houchard
3088daddf3 Work around a problem somewhere with binutils (?) on arm, hopefully without
breaking any other arch this time.
2004-05-15 00:13:14 +00:00
Stefan Eßer
55a4ccf3e8 Fix breakage caused by alphabetically sorting SRCS: rtld_start.S must come first!
The previous version made all shared binaries dump core.
2004-05-14 21:01:52 +00:00
Olivier Houchard
e659267f1e Import arm bits for rtld-elf.
Obtained from:	NetBSD
2004-05-14 12:15:51 +00:00
Doug Rabson
f88e6caca2 If we change obj_rtld.path after initialising __progname, make sure we
change __progname to point at the new storage otherwise it ends up
pointing at freed memory which leads to confusing garbled error messages.
2004-03-29 18:37:37 +00:00
Peter Wemm
c707fea10b More stack alignment fixes. Arrange so we call _rtld() in ld-elf.so.1
with the correct alignment.  This is important because this calls to
library static constructors are made from here.  The bug in the old crt*.s
files hid this because in this case, two wrongs do indeed make a right.
Also, call _rtld_bind() with the correct alignment, because it calls back
into the pthread library locking functions.  If things happen just
the wrong way, we get a SIG10 due to the broken stack alignment.
2004-03-21 01:43:39 +00:00
Peter Wemm
c905e45dc0 Add initial support for compiling a special 32 bit version of
ld-elf.so.1 on 64 bit systems.  Most of this involves using alternate
paths, environment variables and diagnostic messages.

The build glue is seperate.
2004-03-21 01:21:26 +00:00
Mark Murray
16fc3635f7 Make NULL a (void*)0 whereever possible, and fix the warnings(-Werror)
that this provokes. "Wherever possible" means "In the kernel OR NOT
C++" (implying C).

There are places where (void *) pointers are not valid, such as for
function pointers, but in the special case of (void *)0, agreement
settles on it being OK.

Most of the fixes were NULL where an integer zero was needed; many
of the fixes were NULL where ascii <nul> ('\0') was needed, and a
few were just "other".

Tested on: i386 sparc64
2004-03-05 08:10:19 +00:00
Alexander Kabaev
2627f3570d Do not depend on existence of _end symbol in obj_from_addr, use
obj->mapbase and obj->mapsize instead.

Prompted by: 	OpenOffice debugging session at last BSDCon.
2004-02-25 17:06:16 +00:00
Max Khon
6e918a4d5e Fix "warning: value computed is not used".
Found by:	gcc 2.95.4 [FreeBSD]
2004-02-03 18:53:40 +00:00
Doug Rabson
ae59481b1a Initialise some uninitialised variables.
Thanks to: valgrind
2003-12-31 15:10:41 +00:00
Peter Wemm
6143d8ba5f Fix dynamic linking a bit more.. enough that mozilla-firebird works if you
dig up the patches for amd64 support for it.

Note to self: do not put a 64 bit value in a 32 bit space.
2003-12-12 01:12:41 +00:00
Peter Wemm
080f5381b7 Revert last change. ../rtld.c uses CACHE_LINE_SIZE too.
Change it to 64 while here.

Reported by:  ps
2003-12-11 18:42:51 +00:00
Peter Wemm
165d50f626 Only define CACHE_LINE_SIZE in one place.. 2003-12-11 04:49:37 +00:00
Peter Wemm
40a7c81112 CACHE_LINE_SIZE is 64 on athlon and amd64 chips, not 32. This should
probably be 128 since that is what the hardware prefetch fill size is
on both the p3, p4 and athlon* cpus.
2003-12-11 04:47:53 +00:00
Anton Berezin
4893027ac4 Sync comment with code's reality.
MFC after:	1 week
2003-11-14 12:56:56 +00:00
Matthew N. Dodd
5515f48ce3 Retire the WITH_LIBMAP compile knob; libmap is now a standard feature. 2003-09-13 21:50:36 +00:00
Matthew N. Dodd
4402996dea Change libmap.c:lm_init() to return a status value; 0 for success
(libmap available) and 1 for failure.  Assign this return to the
global 'libmap_disable' variable in rtld.c.

This totally prevents any libmap functions from being called after
lm_init() if no config file is present.
2003-09-13 21:43:08 +00:00
Warner Losh
566ef09073 Very minor style nit: sort include files alphabetically. 2003-08-22 02:22:59 +00:00
Gordon Tetlow
df7bdd0ae9 Forgot one instance of ld-elf.so.1. Convert to ${PROG}
Pointed out by:	obrien
2003-08-17 22:12:26 +00:00
Gordon Tetlow
dbbcd515ff Don't forget to honor DESTDIR. Also switch over to using PROG instead of
the binary name directly.
2003-08-17 18:59:30 +00:00
Gordon Tetlow
a857d9305c Don't forget to chflags noschg the existing binary so we can symlink
over it safely.

Pointed out by:	yosimoto@waishi.jp
2003-08-17 18:50:56 +00:00
Gordon Tetlow
df7c0368c1 As long threatened, stage 2 of making a dynamically-linked root a reality.
Install rtld into /libexec.
2003-08-17 08:06:00 +00:00
Gordon Tetlow
7b73593acd Prepend /lib to the builtin library search path in rtld. 2003-08-17 07:55:17 +00:00
Jake Burkholder
d037213487 Avoid using the global offset table to get the address of _DYNAMIC in
rtld.  When _DYNAMIC is referenced normally from C the global offset
table is used implicitly, but newer versions of binutils don't initialize
it statically in the binary, so this doesn't work until rtld is relocated,
which _DYNAMIC is needed for...  So, as on other systems with the same
problem, we disassemble a call instruction to _DYNAMIC in order to get
its address.
2003-07-04 00:05:15 +00:00
Matthew N. Dodd
e2a474429e Fix warnings on 64 bit platforms.
Noticed by:	 jake
2003-06-19 16:09:18 +00:00
Matthew N. Dodd
5407dd5b82 Add function prototypes. 2003-06-19 05:28:26 +00:00
Matthew N. Dodd
ded0e52363 LD_DUMP_REL_PRE and LD_DUMP_REL_POST don't output to stderr; don't
claim that they do.
2003-06-19 04:34:09 +00:00
Matthew N. Dodd
c5d061c17a Provide a mechanism for dumping relocation information.
Setting the LD_DUMP_REL_PRE or LD_DUMP_REL_POST environment variables
cause rtld-elf to output a table of all relocations.

This is useful for debugging.
2003-06-19 03:55:38 +00:00
Matthew N. Dodd
94040887ee Move MD function prototypes together. 2003-06-19 02:42:04 +00:00
Matthew N. Dodd
2c297acb7a Fix warnings; no parameters in function prototypes. 2003-06-19 02:39:37 +00:00
Matthew N. Dodd
5952de4b1b Avoid a NULL pointer dereference. 2003-06-18 16:17:13 +00:00
Matthew N. Dodd
7227105f74 Include libmap.h for prototypes. 2003-06-18 05:31:08 +00:00
Matthew N. Dodd
da9f245470 - Add support for DT_FLAGS.
- Define various things from the most recent ELF spec.
2003-06-18 03:34:29 +00:00
Marcel Moolenaar
b615f6d2b1 Don't fail if we encounter a relocation of type "none". Just ignore
it. It's a no-op relocation.

Trigger case: ports/x11-toolkits/pango
2003-06-07 07:52:17 +00:00
David E. O'Brien
8f17707c61 Set CSTD to gnu99. We can only use on of the gnu?9 C languages.
We can't use c89 due to use of 'inline', and c99 produces bad code.
2003-06-04 05:42:04 +00:00
Ruslan Ermilov
09f84dd1d3 Assorted mdoc(7) fixes. 2003-06-02 15:02:06 +00:00
Matthew N. Dodd
c930fec7a2 - use issetugid()
- be paranoid about honoring LD_LIBMAP_DISABLE.

Suggested by:	 rwatson
2003-05-31 15:24:29 +00:00
Matthew N. Dodd
341b3de62b Simplify map_object() by breaking out the ELF header validation bits
into a separate function.
2003-05-31 14:48:59 +00:00
Matthew N. Dodd
1aac1ed634 Provide function entry debugging messages. 2003-05-31 14:46:38 +00:00
Matthew N. Dodd
4df60d1cac Use the environment variable LD_LIBMAP_DISABLE to disable
libmap.conf(5) functionality.
2003-05-31 14:45:11 +00:00
Matthew N. Dodd
1340fc1015 Don't post-increment pointers inside a loop conditional.
While I'm here:
- Let lm_add() call strdup() on its own behalf.
- Use a temporary pointer when parsing constraints; only set the
  constraint pointer on a totally successful match.

PR:		 bin/52783
Submitted by:	 David P. Reese Jr. <daver@gomerbud.com>
Approved by:	 re (rwatson)
2003-05-30 00:49:16 +00:00
Alexander Kabaev
6d5d786f80 Allow threading libraries to register their own locking
implementation in case default one provided by rtld is
not suitable.

Consolidate various identical MD lock implementation into
a single file using appropriate machine/atomic.h.

Approved by:	re (scottl)
2003-05-29 22:58:26 +00:00
Peter Wemm
9783a12b34 Initial pass at supporting shared libraries on amd64. There are still
a few missing relocation types in amd64/reloc.c, but I have not found
any of them in use yet. :-)

Approved by:  re (amd64/* blanket)
2003-05-24 17:37:51 +00:00
Matthew N. Dodd
3467e8b8a0 - Use xmalloc() and xstrdup() instead of malloc() and strdup().
- Add a global mapping if we have a successful constrained match.

Approved by:	re
2003-05-19 07:10:12 +00:00
Robert Watson
94deb3f034 Since libmap.conf is referenced in rtld.1, include it in the references
section.

Approved by:	re (scottl)
2003-05-17 19:46:49 +00:00
Ruslan Ermilov
60cdf2f1a0 mdoc(7) police: Normalize the FILES section.
Approved by:	re (blanket)
2003-05-16 21:34:21 +00:00
Alexander Kabaev
3ddc66d863 Rethink the way we count module references. Simply following
DT_NEEDED links is not flexible enough for cases where dynamically
loaded modules form a dependency cycle.

This should fix an infinite recursion problem encountered by Yahoo.

Approved by:	re (jhb)
2003-05-08 01:31:36 +00:00
David E. O'Brien
78af18bd24 Fix signed/unsigned comparison warnings. 2003-05-04 00:56:00 +00:00
Peter Wemm
7c1622ff28 Remove 80386 bandaids from code repocopied from i386. rtld_start.S still
todo.
2003-04-30 21:09:06 +00:00
Alexander Kabaev
486089f00c Remove redundant strlen checks, do not check the same
symbol twice.
2003-04-30 19:05:53 +00:00
Matthew N. Dodd
623b6bd2f9 Code cleanups and sanity checking for config file parser. 2003-04-10 01:44:19 +00:00
Matthew N. Dodd
29ade36225 Dynamic object dependency mapping: libmap.
This is an optional feature, disabled by default.

This will be useful to people testing the various POSIX threading
libraries under -CURRENT but can easily serve other needs.
2003-04-07 16:21:26 +00:00
Arun Sharma
35522a0aa1 Fix for ia64/48024 - ensure function pointer equality across elf
objects.

Programs such as sshd depend on two pointers to the same function being
equal in a given process. However, the current ia64 implementation
ensures that they're equal when both the pointers are instantiated in
the same ELF object. The attached patch ensures that they're equal
irrespective of where they're instantiated.

Reviewed by marcel@ (mentor) and kan@
2003-03-19 21:38:27 +00:00
Alexander Kabaev
63c1e7cb8d Free obj->priv field in obj_free functions. This field is NULL
on all architectures except ia64, which uses it to keep function
description table.
2003-03-14 21:11:28 +00:00
Alexander Kabaev
605f36fc1e No need to zero fill memory, mmapped anonymously. Kernel will
return pre-zeroed pages itself.

Noticed by:     jake
2003-03-14 21:10:13 +00:00
Alexander Kabaev
fa4a502e77 Do not remove object from the lists at the unref_dag() stage.
Introduce a new unlink_object() function and call it in
unload_object() instead. Removing the object in unref_dag() is
too early, rtld calls _fini() function after that and shared
objects might fail resolve their own symbols.
2003-02-17 20:58:27 +00:00
Alexey Zelkin
d9943f166b Advertize rtld(1) as ld.so(1) in manual pages world 2003-02-13 23:07:28 +00:00