Commit Graph

39 Commits

Author SHA1 Message Date
matt d31dbd7578 Add secure-plt support for powerpc to ld.elf_so. As part of this, we have to
stop calling into the GOT/_DYNAMIC since they are no longer executable.
2011-01-16 01:22:29 +00:00
skrll f1d73a2c94 Add support for DF_1_BIND_NOW, DF_1_NODELETE and DF_1_NOOPEN marked
objects, and the RTLD_NODELETE and RTLD_NOLOAD flags to dlopen(3).

Mark libpthread as DF_1_NOOPEN and use it to test the functionality.

Somewhat taken from FreeBSD.

Fixes PR 42029.

OK from christos and joerg.
2010-12-24 12:41:42 +00:00
skrll 8b916d603d Add cast so that usr.bin/ldd/elf32 builds. 2010-10-16 17:48:12 +00:00
skrll e6cdac9c4b Implement dl_iterate_phdr.
Somewhat taken from FreeBSD. Manual page from OpenBSD.
2010-10-16 10:27:06 +00:00
skrll 0a77584d8f Revert previous for now. It's part of a larger commit which will arrive
soon.
2010-10-15 15:08:05 +00:00
skrll a048346afd Be more tolerant to the location of PT_PHDR in the segment list. 2010-10-15 07:22:44 +00:00
skrll a108583dc7 Oops. Remove trailing whitespace in previous. 2010-09-30 19:45:24 +00:00
skrll d965c46816 Improve debug output. 2010-09-30 19:43:11 +00:00
skrll 06acf46b03 Introduce a new type Elf_Symindx for use in decoding the symbol hash table
section and allow this type to be overridden.

The ELF specification says it should always be uint32_t (Elf_Word), but
alpha decided to be different (not sure why). Define Elf_Symindx to be
uint64_t on alpha.

Alpha no longer uses non-standard definitions of Elf64_Sword and
Elf64_Word.  Remove the ability to override these types.

Fixes ld.elf_so after Herculean effort from me and martin.
2010-09-30 09:11:18 +00:00
joerg 11fdf81f84 Avoid casting from d_val to plttype of different signedness.
Just two booleans for the same purpose.
2010-09-23 13:03:35 +00:00
joerg ff0f2fb483 Use fast_remainder32 for the ELF hash. For the hot cache case, this
speeds up Firefox startup by over 2% on AMD64.
Limit hash table buckets to 32bit.
2010-04-05 14:01:26 +00:00
lukem e91bd42f43 Fix const issues (cast const pointers to "const uint8_t *" instead of "caddr_t") 2009-04-12 13:29:29 +00:00
mrg fb3cc85fef add some (uintptr_t) to some casts, so these compile with ELFSIZE=32
*and _LP64.  necessary for 32/64 bit combo ldd support.
2009-01-06 04:01:46 +00:00
christos 8fb14189dc make this compile again. 2007-12-29 01:44:03 +00:00
christos 716fde8fa0 simplify; mapbase == vaddrbase from the PaX author. 2007-12-28 19:36:21 +00:00
christos 8636ab52f6 Deal with ASLR PIE executables, by recognizing that phdr != phdr->v_addr
for PT_PHDR headers when the program has been loader to a vaddr other than
then one specified (a randomized one), and modifying the relocation base
address appropriately (idea from elad)
2007-12-26 21:14:41 +00:00
ad 558a5ffd0f rtld changes for PR bin/37347:
- Apply patch from J.T. Conklin to execute .init/.fini functions in order.
- Support DF_1_INITFIRST and mark libc with DF_1_INITFIRST. Shared libs
  should be recording a dependency on libc, but it's too late to do that.

Ok christos@.
2007-12-07 20:34:04 +00:00
christos 40cfdb5e3a Use AT_SUN_EXECPATH instead of argv[0] for the executable name. This needs
kernel support, which is not there yet, thus $ORIGIN is broken at this time.
This is ok, nothing uses it yet.
2007-09-20 14:14:25 +00:00
christos 04ee85ad50 Support Solaris-like $ORIGIN etc. expansions in paths. 2007-05-18 21:44:08 +00:00
simonb c364c98f98 Don't process DT_DEBUG on MIPS as the dynamic section is mapped
read-only.  DT_MIPS_RLD_MAP is used instead.

Patch from Nick Hudson.
2005-01-09 12:43:23 +00:00
skrll 2728318e3c Add __RCSIDs.
OK'd by mycroft.
2004-10-22 05:39:56 +00:00
skrll 5f573ab68d ANSIfy and de-__P(). 2003-07-24 10:12:25 +00:00
mycroft ad8ccd6290 Minor cleanup. 2002-10-05 11:59:03 +00:00
mycroft 6f56cdc91f Rearrange _rtld_map_object() a little, so that we don't have to have the first
page of the object double-mapped.  Not that it matters much, but someone was
whinging about it.
While I'm at it, nuke obj->phdr and obj->phsize; they're unused.
2002-10-04 18:50:43 +00:00
mycroft 5f24ee89f3 Don't bogusly set obj->pltrela{,lim} if there is no DT_PLTREL. 2002-09-26 20:27:50 +00:00
mycroft 305b0ffce5 #if defined -> #ifdef 2002-09-25 06:43:46 +00:00
mycroft a18c524897 Figure out obj->pltrel(a) after the dynamic section is parsed, so the relative
order of DT_PLTREL and DT_JMPREL is irrelevant.  Removes the need for yet
another weird #ifdef.
Also, be slightly more careful with the rel(a)lim trimming.
2002-09-13 13:28:43 +00:00
mycroft a3b892d178 Nuke -DRTLD_RELOCATE_SELF and `dodebug' from orbit. 2002-09-12 22:56:28 +00:00
mycroft cf2d41da85 If REL(A)SZ extends into .rel(a).plt, trim rel(a)lim. This is actually due to
what is arguably a bug in BFD on some platforms (at least PPC and SPARC), but
I can't fix old binaries.
2002-09-05 16:58:16 +00:00
fredette e4526bd9fa Add support for dynamic linking on HP PA-RISC. 2002-07-10 15:12:33 +00:00
kleink 63ccd3db5b Sync with <sys/exec_elf.h> rev. 1.45: ElfNN_RelA -> ElfNN_Rela. 2001-04-25 12:24:50 +00:00
mycroft 43cfeb27a9 Catch up with type changes. Also:
* Apply DT_PLTRELSZ to (one of) pltrel or pltrela *after* we've finished
  parsing the headers, so we know which one.
* Fix sparc64 bogons.  (It works now!)
2000-07-26 02:07:34 +00:00
eeh 55c1b7fb0d Fix some issues with SPARC V9 ELF binaries. 2000-07-18 22:33:55 +00:00
mycroft 305c949781 Changes from msaitoh to fix local/global symbol confusion, and to fix weak
symbol support -- updated by me for elf.h changes.
1999-11-07 00:21:12 +00:00
kleink 522cbf0248 Update to match new SVR4-style definition names in <sys/exec_elf.h>. 1999-10-25 13:55:06 +00:00
christos 26475619ed KNF 1999-03-01 16:40:07 +00:00
christos 84cb65780e Cleanup global variable access so rtld can be self relocating. Also KNF
reloc.c and move md sparc parts to arch/sparc/mdreloc.c
Now we don't need to load at address 0 on the i386 and the mips should be
trivial to fix.
1999-02-24 18:31:00 +00:00
mhitch 082edecc20 Add support for mips. 1998-03-25 04:12:32 +00:00
cgd 41fe218b25 First cut at an ELF shared loader. Originally from John Polstra's FreeBSD elf
kit, then hacked on by Matt Thomas <matt@3am-software.com>, then by me (to
make it work with new versions of the toolchain, etc.).  This runs, but it's
in serious need of cleaning and/or a fair bit of reworking.  See the README
file for more information, and a list of things to do.
1996-12-16 20:37:55 +00:00