Commit Graph

733 Commits

Author SHA1 Message Date
joerg
aad599979d Add TLS support infrastructure. For dynamic binaries, ld.elf_so exports
_rtld_tls_allocate and _rtld_tls_free. libpthread uses this functions to
setup the thread private area of all new threads. ld.elf_so is
responsible for setting up the private area for the initial thread.
Similar functions are called from _libc_init for static binaries, using
dl_iterate_phdr to access the ELF Program Header.

Add test cases to exercise the different TLS storage models. Test cases
are compiled and installed on all platforms, but are skipped on
platforms not marked for TLS support.

This material is based upon work partially supported by
The NetBSD Foundation under a contract with Joerg Sonnenberger.

It is inspired by the TLS support in FreeBSD by Doug Rabson and the
clean ups of the DragonFly port of the original FreeBSD modifications.
2011-03-09 23:10:05 +00:00
matt
4fee4fe7b3 Don't rely on >32bit math. 2011-03-04 00:40:48 +00:00
pooka
33ee52c7dc make DEBUG compile without RTLD_DEBUG 2011-02-24 10:58:54 +00:00
matt
483a1c95a2 Fix problem with bss-plt objects which a reloc index, not offset.
(secure-plt uses an offset (index*sizeof(rela), bss-plt uses an index)
secure-plt will now take the offset and divide by 12 for an index.
2011-02-10 02:28:20 +00:00
skrll
3770380428 Unbreak gdb by ensuring _rtld_debug_state is in the dynamic symbol table.
mmm 1 line diffs

mmm not breaking backwards compatibility for anything known/unknown or
public/private.
2011-01-25 12:25:43 +00:00
matt
709c8a2f01 Move powerpc gotptr to the end to preserve binary compatibility. 2011-01-16 15:56:37 +00:00
matt
b094d98191 Warn about DT_TEXTRELs 2011-01-16 02:36:05 +00:00
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
1f45aab781 Sprinkle some KNF. 2010-12-19 17:26:51 +00:00
skrll
ad7786ec8b Remove unnecessary #ifdef RTLD_DEBUG 2010-12-19 17:17:50 +00:00
wiz
617acddc41 Remove superfluous Pp. 2010-12-17 08:50:26 +00:00
skrll
1ee8ff33ba Remove implementation detail.
Bump date.
2010-12-17 07:04:52 +00:00
joerg
c4120e324e Replace use of errlist with a single concatenated version and an offset
array. This requires less storage and avoids one runtime relocation per
errno value.
2010-12-16 22:52:32 +00:00
joerg
67cc8c0871 Don't use normal environment handling functions from libc, but iterate
once over the array and clean out entries as needed.
2010-12-16 22:47:27 +00:00
skrll
126c589398 s/rdbg/dbg/ in a few places. 2010-12-16 19:59:39 +00:00
skrll
76d5f138f4 Remove incorrect comment. 2010-12-16 19:35:38 +00:00
wiz
fbc697a1ed Note that $ORIGIN kernel support (in kern/kern_exec.c) is currently disabled.
Info from skrll@.
Bump date.
2010-12-16 19:25:41 +00:00
joerg
67e01e0a99 Build ld.elf_so with -fvisibility=hidden. Exploit this for i386/x86_64
to simplify the assembler code.
2010-12-05 00:56:06 +00:00
joerg
91118529e4 ANSIfy 2010-12-03 23:07:49 +00:00
joerg
239c31f883 Add comment about the unusual stack alignment in .rtld_bind_start. 2010-12-03 22:48:25 +00:00
tron
1fbd900608 Don't use internal libc function __findenv(). 2010-11-14 22:09:16 +00:00
christos
acfd35dad9 PR/44010: YAMAMOTO Takashi: sbrk: grow 0xb3ba2000 failed, error = 12"
(due to setenv changes?)
Provide a mini unsetenv that does not allocate/free memory and does not
bother about locking.
2010-10-29 15:08:17 +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
christos
45bdf1678c restore binary compatibility for pre-2.0 binaries, requested by skrll and core. 2010-10-10 21:27:16 +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
0e07ba7138 Add the magic branch instruction that is used by GCC's
__canonicalize_funcptr_for_compare() function to fixup relocations in
order to do function pointer comparisons.

From OpenBSD.
2010-09-30 19:32:40 +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
matt
af56990d0c Make the GOT1_MASK 64-bit clean. 2010-09-24 15:20:52 +00:00
skrll
8f77c5159b Comment reformat. 2010-09-24 12:00:10 +00:00
skrll
2c56298dd9 Wrap long line. 2010-09-24 11:59:28 +00:00
skrll
09601c884f Whitespace. 2010-09-24 11:57:11 +00:00
skrll
6229c56fea Wrap long lines
Reformat comments.
2010-09-24 11:41:46 +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
skrll
07666b6356 Wrap long line. 2010-09-11 11:11:52 +00:00
joerg
6972211664 Stricter matching for _rtld_invalid_paths by ensuring separator.
Use mem* functions instead of str* for strings of known size.
2010-08-07 19:47:34 +00:00
joerg
f40b256f09 Reduce header pollution for mdreloc.c. Make Obj_Entry argument of
_rtld_relocate_nonplt_objects non-const in preparation for TLS support.
2010-08-06 16:33:17 +00:00
mrg
c8cf27943d make sure to look in CFLAGS, COPTS and CPPFLAGS for abi options.
fixes sgimips64 build of n64 ld.elf_so.
2010-07-11 07:43:12 +00:00
mrg
4c92852a80 remove almost all the ability to build netbsd with an a.out target.
we're ELF now, and there are many missing checks against OBJECT_FMT.
if we ever consider switching, the we can figure out what new ones
we need but for now it's just clutter.

this doesn't remove any of the support for exec_aout or any actually
required-for-boot a.out support, only the ability to build a netbsd
release in a.out format.  ie, most of this code has been dead for
over a decade.

i've tested builds on vax, amd64, i386, mac68k, macppc, sparc, atari,
amiga, shark, cats, dreamcast, landisk, mmeye and x68k.  this covers
the 5 MACHINE_ARCH's affected, and all the other arch code touched.
it also includes some actual run-time testing of sparc, i386 and
shark, and i performed binary comparison upon amiga and x68k as well.


some minor details relevant:
- move shlib.[ch] from ld.aout_so into ldconfig proper, and cut them
  down to only the parts ldconfig needs
- remove various unused source files
- switch amiga bootblocks to using elf2bb.h instead of aout2bb.h
2010-07-06 05:59:50 +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
skrll
134b0fcc8f Only apply -Wno-stack-protector where alloca is used. 2010-03-20 16:36:35 +00:00
roy
51085124f6 Use the gcc directive to disable SSP warnings. 2010-03-19 20:53:50 +00:00
roy
d5e8f757b8 Use alloca(3) instead of local xmalloc for creating our DoneLists.
This allows threaded programs to use us a little better, PR lib/43005.
We need to disable SSP when using alloca.
2010-03-18 22:17:55 +00:00
roy
b02ec7e9f8 Implement negative cache checks for symbol lookups.
Uses the Donelist idea from FreeBSD.
2010-02-27 11:16:38 +00:00
skrll
d306de736d Restore backwards compatibility for binaries referencing the main
Obj_Entry.
2010-01-17 08:04:20 +00:00
skrll
2e0bcc8d3b Remove cargo cult dlinfo entry point. 2010-01-16 10:37:51 +00:00