Commit Graph

705 Commits

Author SHA1 Message Date
Chih-Hung Hsieh
306ea7ebe5 Add comments about the -shared flag.
Must build this linker as a shared object.
A statically linked module does not load during init.

BUG: 18008984

Change-Id: I5f0411129024edcb9381c473ea4e741a075e9184
2015-01-22 19:09:20 -08:00
Dmitriy Ivanov
1649e7ee5b Enable -Wold-style-cast warnings for linker
And fix old style casts.

Change-Id: I37e7a3e3fd852528ea76f02d967c7bd8cd5b06c9
2015-01-22 16:33:30 -08:00
Christopher Ferris
151da68100 Contact proper debuggerd when crashing.
Make the request structure match the new structure found in debuggerd
code.

On 64 bit systems, make sure that the 32 bit compiled linker is contacted.

Bug: https://code.google.com/p/android/issues/detail?id=97024
Change-Id: I675b8ff222fcf836b05de4e9b5976ff91ca929bf
2015-01-20 17:22:25 -08:00
Dmitriy Ivanov
114ff69f17 Refactoring: move mips reloc to separate method
Change-Id: I712614853e3f0e515f5c2bdd8f0aaa5feeae8e55
2015-01-14 18:03:19 -08:00
Dmitriy Ivanov
bcc04d0069 Refactoring: unify relocate function
Use one relocate for all platforms.

Change-Id: I43e75162c5b29105e651defc11a511e168368736
2015-01-13 19:15:02 -08:00
Dmitriy Ivanov
1b694693b4 Refactoring: use generic reloc constants
Change-Id: I94dd6256b1b4509b6ea696a3aff17a3991529468
2015-01-13 15:56:54 -08:00
Dimitry Ivanov
d338aac19c Revert "Refactoring: use generic reloc constants"
This reverts commit 265a60a0d2.

Change-Id: I6d46db0ac03cda44ed1e20f6084a552e0089eb14
2015-01-13 22:31:54 +00:00
Dmitriy Ivanov
265a60a0d2 Refactoring: use generic reloc constants
Change-Id: I67918a1a926164a38a5a47f2264390632eb42905
2015-01-13 12:17:31 -08:00
Dmitriy Ivanov
9c4783b18c Merge changes I713800ce,I1dea46c3
* changes:
  Refactor soinfo::relocate
  Add ARM_IRELATIVE relocation
2015-01-09 23:44:50 +00:00
Dmitriy Ivanov
cefef7dab6 Refactor soinfo::relocate
Move common relocation types outside of ifdefs

Change-Id: I713800ce123a18178b5ac80c0b3c7bd6b21a02c2
2015-01-09 14:57:53 -08:00
Duane Sand
6f40a8ac74 Revert "Must use Clang assembler for mips target."
This reverts commit 6f96d58c0d.
2015-01-09 10:24:11 -08:00
Dmitriy Ivanov
b5e508cfee Merge "Set linux 32bit personality for 32 bit processes" 2015-01-08 00:46:49 +00:00
Dmitriy Ivanov
bfa15e464e Set linux 32bit personality for 32 bit processes
Bug: 18069809
Change-Id: Ie143d56b0f8f03510dc451649291067e1add1d2f
2015-01-07 16:32:05 -08:00
Dmitriy Ivanov
6718125ac7 Print error when prelink fails for main executable
Bug: 18931021
Change-Id: Ib6c39a409161b20a10c3485272c73bc2abd4ee4f
(cherry picked from commit d9e211ca1f)
2015-01-07 15:49:40 -08:00
Raghu Gandham
688157295f Add support for DT_MIPS_RLD_MAP2 tag.
Position Independent Executables cannot communicate with GDB using DT_MIPS_RLD_TAG.
Hence a new tag DT_MIPS_RLD_MAP2 got introduced to fix the issue.

Change-Id: I77ce3faf1ef2e121003b804ecd291abb25cfbb56
Signed-off-by: Nikola Veljkovic<Nikola.Veljkovic@imgtec.com>
2014-12-19 11:13:11 -08:00
Chih-Hung Hsieh
6f96d58c0d Must use Clang assembler for mips target.
GNU assembler has internal error with clang's output.

BUG: 18807290
Change-Id: Iabbe991720fc562884f19d79bded903505fc891d
2014-12-18 17:10:56 -08:00
Dmitriy Ivanov
5ae82cba59 Fix soinfo_unload
1. Take into consideration that the local_group_root_
    is not set for all of not linked libraries.
 2. We need to check visited list earlier to avoid double
    soinfo_free.

Change-Id: Iabc0a06a97c63f7e6bd4641731f50bb1466fed4f
2014-12-02 17:28:34 -08:00
Elliott Hughes
b514026eb2 Kill <machine/exec.h>.
Bug: 18546535
Change-Id: I479e003deab21e31eb5caa5393067ed1dc558387
2014-12-02 16:16:29 -08:00
Dmitriy Ivanov
20463e3e53 Fix mips build
Change-Id: Iddbf06784d19556a55d833e20a68e6ccf5a7c5be
2014-12-02 13:27:40 -08:00
Dmitriy Ivanov
291dbf65ca Merge "Count references for groups instead of instances" 2014-12-02 19:10:04 +00:00
Dmitriy Ivanov
ab972b9adf Count references for groups instead of instances
Count references on the group level to avoid
  partially unloading function that might be
  referenced by other libraries in the local_group

  Bonus: with this change we can correctly unload recursively
  linked libraries. is_recursive check is removed.

  Also dynamic executables (not .so) with 0 DT_NEEDED libraries
  are now correctly linked.

Change-Id: Idfa83baef402840599b93a875f2881d9f020dbcd
2014-12-02 10:54:26 -08:00
Dmitriy Ivanov
224fb6144a Merge "Resolve "unused DT entry" warnings for DT_VERNEED and DT_VERNEEDNUM." 2014-12-02 17:37:18 +00:00
Alexander Ivchenko
e831433fe1 Resolve "unused DT entry" warnings for DT_VERNEED and DT_VERNEEDNUM.
Change-Id: Id18310811a6d183878a1d4d26cc2498f4fd00c55
Signed-off-by: Alexander Ivchenko <alexander.ivchenko@intel.com>
2014-12-02 15:34:30 +03:00
Elliott Hughes
212e0e3824 Build our benchmarks against glibc too.
Bug: 18556607
Change-Id: I455ac8b93c0835836180e549486bc52d393ee6a6
2014-12-01 16:43:51 -08:00
Dmitriy Ivanov
a2547055f2 Fix jump to unmapped memory on atexit
Split d-tor calls and soinfo_free to 2 separate steps

Bug: 18338888
Change-Id: Idbcb7242ade16fa18cba7fe30505ebd8d6023622
2014-11-18 13:16:27 -08:00
Dmitriy Ivanov
047b5934b5 Rename soinfo methods and fields
Change-Id: If68fbe287d3ad954238b1688f71013371f3f7fae
2014-11-13 19:48:32 -08:00
Dmitriy Ivanov
8894091683 Fix mips build
Change-Id: I58b01db38ab9a397a8bd77c1296aac12957c21da
2014-11-12 18:21:12 -08:00
Dmitriy Ivanov
ec18ce06f2 Add support for hash-style=gnu
Change-Id: I171434a587420895feac8a9b1ad2342087197568
2014-11-12 16:38:12 -08:00
Yabin Cui
16f7f8d250 check invalid file offset when loading library
Bug: 18178121
Bug: 18078224

Change-Id: I5254433d54645db68e9b83d5095dc2bf9d8531bc
2014-11-04 14:37:15 -08:00
Dmitriy Ivanov
38ff882276 Merge "Revert "Use local copy of the library name on dlopen"" 2014-11-01 02:32:24 +00:00
Dmitriy Ivanov
9fb216f844 Revert "Use local copy of the library name on dlopen"
This reverts commit da8e591c39.

Change-Id: I3fd6f235b18c232af5cc5ecd481851486d7d68f6
2014-11-01 02:30:38 +00:00
Dmitriy Ivanov
f33ad40023 Merge "Fix symbol lookup order during relocation" 2014-10-31 23:51:18 +00:00
Dmitriy Ivanov
da8e591c39 Use local copy of the library name on dlopen
Bug: 18052100
Change-Id: Idbc2a3691db3b5525d4e9bca81d78d5f29bc438f
2014-10-31 14:23:34 -07:00
Dmitriy Ivanov
d225a5e652 Fix symbol lookup order during relocation
Relocate symbol against DF_1_GLOBAL shared libraries
  loaded before this shared library. This includes
  main executable, ld_preloads and other libraries
  that have DF_1_GLOBAL flag set.

Bug: 2643900
Bug: 15432753
Change-Id: Ia788748be59b739d1c7e62b978e7e255f9e65c7b
2014-10-31 11:39:51 -07:00
Dmitriy Ivanov
c9d1658397 Remove unnecessary reinterpret_cast
Change-Id: Id2ddf4e74bc66825206d1287f899d716537a68d0
2014-10-24 14:46:12 -07:00
Dmitriy Ivanov
90b74fb867 Fix mips build
Change-Id: Ia2dc2e07740bdbb91ee92bfea459230015fcc99b
2014-10-23 14:34:12 -07:00
Dmitriy Ivanov
e47b3f8456 Remove unnecessary lookups during relocations
local_group includes this library and its dependencies.

Change-Id: Ib02474b2355bb147de3889f60092cb2f312997ef
2014-10-23 14:19:07 -07:00
Dmitriy Ivanov
cfa97f172d Fix relocation to look for symbols in local group
The local group is a sequence of libraries in default (breadth-first)
  order. It allows RTLD_LOCALLY loaded library to correctly relocate
  symbols within its group (see test-cases).

  Local group lookup is performed after main executable and ld_preloads.

Bug: 2643900
Bug: 15432753
Change-Id: I9bb013b46d17dbb5cbdfb8fef26f552748385541
2014-10-23 12:13:54 -07:00
Dmitriy Ivanov
a6c1279098 Rename library_offset to library_fd_offset
replace lseek() and use pread() instead
 add test for library_fd_offset > file_size case

Bug: 17762003
Change-Id: I4555f0be635124efe849c1f226985bcba72ffcbd
2014-10-21 13:51:08 -07:00
Dmitriy Ivanov
5281e1fb15 Merge "Fix misleading comment." 2014-10-16 17:54:02 +00:00
Dmitriy Ivanov
ea6eae182a Ignore DT_BIND_NOW (0x18)
Bug: 17552334
Change-Id: Ibe93fd3d6580f369f9a6ef8d235bf0df00fe7607
2014-10-15 22:57:14 +00:00
Robert Grosse
4544d9f9bf Fix misleading comment.
Change-Id: I9e2aa6c2ba938c8f8d7c74eba32d313c866c77b2
2014-10-15 14:32:19 -07:00
Dmitriy Ivanov
513e29e16f Resolve "unused DT entry" warnings for x86_64
Change-Id: I3a2c87bf6e6259313cd9203389623f13b7405ef3
2014-10-06 11:32:19 -07:00
Dmitriy Ivanov
07e5bc152d Add file_offset parameter to android_extinfo
Bug: 17762003
Change-Id: I8fb267a3155acef3dba534038cf5d1ef00d7154b
2014-10-06 10:02:34 -07:00
Dmitriy Ivanov
d5df4124bb Merge "Add RTLD_NODELETE flag support" 2014-10-02 21:47:29 +00:00
Dmitriy Ivanov
1b20dafdbe Add RTLD_NODELETE flag support
Bug: https://code.google.com/p/android/issues/detail?id=64069
Change-Id: Ie5f90482feae86391172be4b32d6cb7d76f446fb
2014-10-01 11:09:37 -07:00
Dmitriy Ivanov
ecf532fa1c Fix mips build
Change-Id: I4454e69a982f239b168678c5a681d1078b4bd4f1
2014-09-30 16:30:22 -07:00
Dmitriy Ivanov
6cdeb5234d Fix unused DT entry warnings.
DT_STRSZ Implement strtab boundary checks
 DT_FLAGS_1 Warn if flags other than DF_1_NOW|DF_1_GLOBAL are set

Bug: 17552334
Change-Id: Iaad29cd52f5b2d7d2f785fb351697906dc1617d9
2014-09-30 14:41:29 -07:00
Dmitriy Ivanov
96bc37f2e1 Return has_DT_SYMBOLIC flag.
This reverts commit 8f61d99183

 Despite the fact that static linker does all the work while linking
 -Bsymbolic executables, according to the SCO doc following DT_SYMBOLIC
 and DF_SYMBOLIC flags is still a requirement for the dynamic linker
 as well.

 (see http://www.sco.com/developers/gabi/2012-12-31/ch5.dynamic.html)

Change-Id: I23f6a5e9b662e40cdbc462b64feff912431e800c
2014-09-29 12:10:36 -07:00
Ningsheng Jian
e93be99da0 Fix gdb could not get shared library list issue
Get dynamic flags from phdr table's correct entry rather the first
entry, so that the following DT_DEBUG entry can be set.

Also fix the undefined reference to LoadTask::deleter issue under gcc
-O0 option.

Bug: 17524778
Change-Id: I9c679af197b034761fb739d6c980e628ff2ab84c
2014-09-26 22:58:57 +00:00
Dan Albert
4a6e71100e Merge "Add a dummy atexit(3) to the linker." 2014-09-24 17:27:38 +00:00
Dan Albert
9a05e3818a Add a dummy atexit(3) to the linker.
This is needed when building the linker against a libc that was built
with coverage information.

Bug: 17553780
Change-Id: If131002e067dd7768fc657c30e62c42a45c05ace
2014-09-24 10:26:41 -07:00
Elliott Hughes
0dc39f9952 Fix a couple more cases of missing CLOEXEC.
The debuggerd case can probably never happen, because you're crashing at this
point anyway. The system property one seems possible though.

Change-Id: Idba6a4f1d68587ec5b320d1e25f0b6a987ea32a0
2014-09-22 17:43:09 -07:00
Dmitriy Ivanov
1b77423eff Temporary disable DL_WARNs for unused DT_*
Bug: 17552334
Change-Id: I2f7b5e4b4d1db96e812a7f86adc929e113d4c11a
2014-09-17 16:46:40 -07:00
Dmitriy Ivanov
f240aa8089 Fix 64bit build
Change-Id: I6ef55b5951270c46ee5e9a11385bd09e33a9f969
2014-09-16 23:34:20 -07:00
Dmitriy Ivanov
4a6e9a835a Fix some unused DT_ warnings
* DT_PLTGOT - ignored for non-mips
 * DT_RELCOUNT/RELACOUNT - ignored
 * DT_RELENT/RELAENT - sanity checks
 * DT_SYMENT - sanity check
 * DT_SONAME - ignore for now.

Change-Id: Ied90748d12f733a84f6c38a1250567a2f77608b7
2014-09-16 18:19:36 -07:00
Dmitriy Ivanov
8f61d99183 Remove has_DT_SYMBOLIC flag
From the elf-spec: "Symbolically bound shared objects are
  identified by the .dynamic entry DT_SYMBOLIC. This tag is
  informational only; the runtime linker processes symbol
  lookups from these objects in the same manner as any
  other object."

Change-Id: I4aae0e502ed9fac096fbf076f4d6b2e055d784f6
2014-09-16 15:26:47 -07:00
Dmitriy Ivanov
e8ba50fe0d Fix dlsym() to take into account RTLD_GLOBAL/LOCAL
Symbols from libraries opened with RTLD_LOCAL (default)
  should not be visible via dlsym(RLTD_DEFAULT/RTLD_NEXT, .)

Bug: 17512583
Change-Id: I1758943081a67cf3d49ba5808e061b8251a91964
2014-09-15 17:39:48 -07:00
Dmitriy Ivanov
d74aa58035 Merge "Fix unload of recursively linked library" 2014-09-12 16:55:42 +00:00
Dmitriy Ivanov
aad92067bf Merge "Reformatting" 2014-09-12 16:50:29 +00:00
Dmitriy Ivanov
66bbf1595c Merge "Refactoring: C++11 style DISABLE_ bionic marcos" 2014-09-12 16:50:05 +00:00
Dmitriy Ivanov
6abf624d12 Reformatting
No functional changes.

Change-Id: If71775e5fc207e91ebd31ba3c5f9d2c13dc8dada
2014-09-12 09:43:13 -07:00
Dmitriy Ivanov
a6ac54a215 Fix unload of recursively linked library
Expanded test for recursive libs. Fixed bug with unnecessary
  soinfo_free of already loaded library.

Change-Id: I2cc19f2650c8b12a35feeac127ef608ebba44d88
2014-09-11 22:40:48 -07:00
Dmitriy Ivanov
9aea164457 Add IFUNC support for arm64 and IRELATIVE reloc
There are number of changes in the way IFUNC related relocations are done:
 1. IRELATIVE relocations are now supported for x86/x86_64 and arm64.
 2. IFUNC relocations are now relying on static linker to generate
    them in correct order - this removes necessety of additional
    relocation pass for ifuncs.
 3. Related to 2: rela?.dyn relocations are preformed before .plt ones.
 4. Ifunc are resolved on symbol lookup this approach allowed to avoid
    mprotect(PROT_WRITE) call on r-x program segments.

Bug: 17399706
Bug: 17177284
Change-Id: I414dd3e82bd47cc03442c5dfc7c279949aec51ed
2014-09-11 16:30:45 -07:00
Dmitriy Ivanov
d9ff722661 Refactoring: C++11 style DISABLE_ bionic marcos
Enable the -std=gnu++11 flag for libstdc++ static and
  dynamic libs.

  ScopeGuard uses DISABLE_ macros instead of '= delete';

Change-Id: I07e21b306f95fffd49345f7fa136cfdac61e0225
2014-09-08 17:51:31 -07:00
Dmitriy Ivanov
3c3624f3df Merge "Load libraries in breadth-first order" 2014-09-09 00:49:38 +00:00
Dmitriy Ivanov
14669a939d Load libraries in breadth-first order
This patch fixes the problem with symbol search order
  for dlsym(RTLD_DEFAULT/RTLD_NEXT, .) by loading libraries
  and ld_preloads in correct order.

Bug: https://code.google.com/p/android/issues/detail?id=74255
Change-Id: If1ba5c807322409faa914e27ecb675e2c4541f0d
Attempt: 2
2014-09-08 13:02:50 -07:00
Ying Wang
e07b4da53d Merge "Use LOCAL_POST_LINK_CMD to insert the objcopy command for linker." 2014-09-05 23:41:25 +00:00
Dmitriy Ivanov
498eb18b82 Revert "Load libraries in breadth-first order"
This reverts commit a3ad450a2e.

Change-Id: Ia2b838ad2159c643b80c514849582f4b4f4f40e5
2014-09-05 16:27:54 -07:00
Ying Wang
f9e147b0bf Use LOCAL_POST_LINK_CMD to insert the objcopy command for linker.
Previously we duplicated code in build/core/executable.mk and it's hard
to maintain. LOCAL_POST_LINK_CMD is a clean solution for this.

Bug: 17403674
Change-Id: I8c054bf782af68cf1f88b8d787a78ca74a7968b5
2014-09-05 16:16:35 -07:00
Dmitriy Ivanov
b2a30ee8d2 Fix order of soinfo links (repairs libcxx tests).
Change-Id: Iee9de09657351cd6a7512784ca797e4b84cdd98b
2014-09-05 16:01:47 -07:00
Chih-Hung Hsieh
b58db8b083 Enable clang compilation with libc but not linker.
Clang is still disabled for x86 and x86_64 long double code,
for x86_64 special assembly instruction, and the linker module.

BUG: 17163651
BUG: 17302991
BUG: 17403674
Change-Id: I43c5f5f0ddc0c2a31918f00b57150dadd8f3f26b
2014-09-05 11:18:35 -07:00
Dmitriy Ivanov
a3ad450a2e Load libraries in breadth-first order
This patch fixes the problem with symbol search order
  for dlsym(RTLD_DEFAULT/RTLD_NEXT, .) by loading libraries
  and ld_preloads in correct order.

Bug: https://code.google.com/p/android/issues/detail?id=74255
Change-Id: I4cf84c70dbaabe99310230dfda12385ae5401859
2014-09-03 15:06:14 -07:00
Dmitriy Ivanov
29bbc9dd4c Encapsulate soinfo_link_image and soinfo_relocate
Also get rid of needed[] array for these functions

Change-Id: I8d12887dbec0724309bb171e6bbd9b9ceb32cc70
2014-09-02 11:47:23 -07:00
Dmitriy Ivanov
e057b9fc82 Merge "Introduce size-based r/w allocators" 2014-09-02 17:21:51 +00:00
Dmitriy Ivanov
a492605849 Implement LinkedList::visit()
Change-Id: Ibd9d133dddf1f2e6e65660e3cd2dacafcc0c84d9
2014-09-02 09:45:40 -07:00
Dmitriy Ivanov
0cd83ebb0e Introduce size-based r/w allocators
Change-Id: I75165fc392e5380124039e6db49b0f559c8a518e
2014-09-01 16:17:05 -07:00
Dmitriy Ivanov
c2048944ff Look into ld_preloads before current library
Change lookup order during relocation so that
 ld_preloads always precede caller (unless caller
 is main executable).

 Asan needs this change in order to intercept libc->libc
 calls.

Bug: 15432753
(cherry picked from commit 05e190c093)

Change-Id: I5bfb58e18015b1ec5b77842dbb37fb122fa1fd1a
2014-09-01 14:14:09 -07:00
Dmitriy Ivanov
11387985d2 Merge "Erase elements in LinkedList::remove_if" 2014-09-01 21:06:32 +00:00
Dmitriy Ivanov
4bea498544 Erase elements in LinkedList::remove_if
Change-Id: I5119a78c73ffe780a81c53ab5ff0266d5c82d319
2014-08-29 17:09:24 -07:00
Dmitriy Ivanov
851135bf99 Replace NULL with nullptr
Change-Id: Iad50be617d318ca98883b843229c960ad5b9afa9
2014-08-29 14:13:48 -07:00
Christopher Ferris
052fa3a34c Replace snprintf calls in linker.
When enabling debug malloc, the snprintf calls in the linker fails to
update the buffer.

The problem is that snprintf makes a call to pthread_getspecific that
returns a valid pointer, but the data it points to is zero. This should
never happen and causes the snprintf to stop and do nothing.

Temporarily replace snprintf with a different implementation to work
around this issue.

Bug: 16874447
Bug: 17302493

(cherry pick from commit 172955a4e3)

Change-Id: Idca9d417978403d61debfd0434aaa82fd770f33b
2014-08-27 16:01:57 -07:00
Dmitriy Ivanov
608217e167 Remove unnecessary calls to LinkedList::clear()
Change-Id: I981d2700cb17322c634b751715543fd33ee49b7c
2014-08-26 15:56:31 -07:00
Dmitriy Ivanov
14241402de Enable __cxa_atexit && __cxa_finalize for linker
This allows adding destructors to classes used
 for global variables.

Change-Id: I5e1cd63fe3bf8f66de88cc4f7437cafb350f49b5
2014-08-26 15:44:18 -07:00
Dmitriy Ivanov
0d15094287 Bump soinfo version
This includes:
 1. Placing has_ifunc after fields with version = 0
 2. Switch to has_min_version(v) function.
 3. Minor soinfo initialization refactoring (placement new + ctor)

Change-Id: I1bf5fde4d930914012ce5f3ad5acb48217da9b2d
2014-08-22 13:29:18 -07:00
Dmitriy Ivanov
9598b8c415 Run constructors before resolving ifunc functions
Bug: 17177284
Change-Id: I5714b9bc2d1ca8f8711806bfb68da3d524213e99
2014-08-21 14:24:13 -07:00
Dmitriy Ivanov
02aa70589d Revert "Add support for protected local symbol lookup."
This reverts commit d97e9f546e.

Bug: 17107521
(cherry picked from commit 9419420919)

Change-Id: I1a6df946ac8075699e77d68ffa6ac4a21b88e4bf
2014-08-19 05:19:53 -07:00
Dmitriy Ivanov
ad5e8b5073 Keep symbols for linker
Bug: 17011146
Change-Id: I314e72a1ac9325bf5ea84d52e3d5bc51d8ea00cf
2014-08-14 15:46:36 -07:00
Dmitriy Ivanov
e942b3ed81 Merge "Added test for ifunc support in dynamic linker." 2014-08-12 19:23:43 +00:00
Dmitriy Ivanov
042426ba63 Optimize symbol lookup
Do not run symbol lookup on already visited soinfos
 Not taking into account already visited libraries
 dramatically slows down dlsym in cases when there
 are multiple occurrences of a large library in
 dependency tree.

Bug: 16977077
Change-Id: I1379f30ed8b06758dd1cc76b80833ac8589afa50
2014-08-13 09:21:57 -07:00
Dmitriy Ivanov
51a22a12ab Label pages mapped by linker_allocator
Change-Id: I7e0bf29bc1a480e9be0d1ae573ca1063d90d82ff
2014-08-11 09:22:48 -07:00
Brigid Smith
c5a13efa9b Added test for ifunc support in dynamic linker.
ifuncs now work in i386 and x86_64 when called in the same library as
well as in a different library.

Bug:6657325
Change-Id: Ic0c48b1b0a76cb90f36c20c79f68294cc3fd44a1
2014-08-08 11:29:35 -07:00
Dmitriy Ivanov
aa0f2bdbc2 Fix dlsym(3) to do breadth first search.
dlsym(3) with handle != RTLD_DEFAULT|RTLD_NEXT performs
  breadth first search through the dependency tree.

Bug: 16653281
Change-Id: I017a6975d1a62abb0218a7eb59ae4deba458e324
2014-07-29 14:35:13 -07:00
Dmitriy Ivanov
ed48534718 Fix mips/mips64 build
Add _start entry label to mips/mips64 linker begin.S

Change-Id: Idcdfc3391427b53880650798be0583a7ac022bcc
2014-07-28 21:03:17 -07:00
Dmitriy Ivanov
efe13832dc Fix 'adb shell /system/bin/linker' crash
Bug: https://code.google.com/p/android/issues/detail?id=63174
Change-Id: I072290ea11109c07f277ad3dec7f44fcb7bf6aa6
2014-07-28 16:29:52 -07:00
Dmitriy Ivanov
4151ea73b7 Fix global variable initialization for linker
Linker now calls init functions for itself.

Change-Id: Ibd099812493041ac70f591e3f379ee742b4683b8
2014-07-24 15:33:25 -07:00
Nick Kralevich
be0e43b776 debuggerd: if PR_GET_DUMPABLE=0, don't ask for dumping
PR_GET_DUMPABLE is used by an application to indicate whether or
not core dumps / PTRACE_ATTACH should work.

Security sensitive applications often set PR_SET_DUMPABLE to 0 to
disable core dumps, to avoid leaking sensitive memory to persistent
storage. Similarly, they also set PR_SET_DUMPABLE to zero to prevent
PTRACE_ATTACH from working, again to avoid leaking the contents
of sensitive memory.

Honor PR_GET_DUMPABLE when connecting to debuggerd. If an application
has said it doesn't want its memory dumped, then we shouldn't
ask debuggerd to dump memory on its behalf.

FORTIFY_SOURCE tests: Modify the fortify_source tests to set
PR_SET_DUMPABLE=0. This reduces the total runtime of
/data/nativetest/bionic-unit-tests/bionic-unit-tests32 from approx
53 seconds to 25 seconds. There's no need to connect to debuggerd
when running these tests.

Bug: 16513137
Change-Id: Idc7857b089f3545758f4d9b436b783d580fb653f
2014-07-23 15:48:49 -07:00
Elliott Hughes
3758a244cf Fix a couple of bugs in generate-NOTICE and regenerate the NOTICE files.
Change-Id: Id6fcb74292e661504d0758bfce24abdc18cb8d32
2014-07-22 21:29:00 -07:00
Elliott Hughes
625993dfbb Use VDSO for clock_gettime(2) and gettimeofday(2).
Bug: 15387103
Change-Id: Ifc3608ea65060c1dc38120b10b6e79874f182a36
2014-07-16 14:27:43 -07:00
Elliott Hughes
3139f6fdd7 Merge "Remove __CTOR_LIST__ from mips/mips64." 2014-07-09 14:42:04 +00:00
Elliott Hughes
40ad229b25 Remove __CTOR_LIST__ from mips/mips64.
Change-Id: I3486b09e30b32ddb67da602cbc2b5fb0402f9764
2014-07-09 09:20:17 -07:00
Elliott Hughes
996524383f Don't zero r1 on entry to the dynamic linker.
There's no need: __linker_init only takes one argument.

Also remove the arm __CTOR_LIST__; we use .init_array and .fini_array instead
of .ctor and .dtor anyway, and I don't think we've ever supported the latter.

Change-Id: Ifc91a5a90c6aa39d674bf0509a7af2e1ff0beddd
2014-07-08 21:38:32 -07:00
Dmitriy Ivanov
3a8646fc5d Change android_dlextinfo flags to uint64_t
Change-Id: Id27e8f8e58dbcf6ae79644f2ad3af3dd0aef9ae7
2014-07-08 11:24:03 -07:00
Elliott Hughes
1558138315 Regenerate the bionic NOTICE files.
Also fix a few formatting issues in copyright headers that were confusing
the script (though obviously it would be better if the script were smarter).

Change-Id: I7f561bef4f84fdcbd84f375ee226bd65db0e507b
2014-07-07 15:42:06 -07:00
Nick Kralevich
76e289c026 Revert "Reenable support for non-PIE executables"
/system/bin/tf_daemon on Nakasi has been updated so it's
a PIE executable. We can now drop non-PIE support.

This reverts commit d81b3b275d.

Bug: 15086752
Bug: 15732002
Bug: 14566672
Change-Id: I832c4de01a8fa050754ea64da317d1639990265e
2014-07-03 12:08:34 -07:00
Dmitriy Ivanov
d383066941 Build fix
Change-Id: Ib43e0f055e3c5f07b50393bfcab9738454835ac3
2014-07-02 16:06:50 -07:00
Dmitriy Ivanov
04dc91ae76 Load library using file handle.
* This patch enables dlopen by file descriptor
   instead of path/name.

Bug: 15984217
Change-Id: Ib39051e00567fb97070bf96d8ce63993877c0a01
2014-07-02 13:20:47 -07:00
Dmitriy Ivanov
fcac81ef04 Native tests are now multilib=both by default
Change-Id: I788ac0b871703c137727a65e017c4466127c0190
2014-07-01 15:38:22 -07:00
Dmitriy Ivanov
12bf3bcdee Write message to stderr on __libc_fatal()
Change-Id: Ia8d6e256768fa51786d0139d3f3b6e9e4bebe027
2014-07-01 14:46:03 -07:00
Dmitriy Ivanov
d97e9f546e Add support for protected local symbol lookup.
Bug: http://code.google.com/p/android/issues/detail?id=66048
Change-Id: Ib334223df27adad9477fb241ab099c5e26df4a7d
2014-07-01 10:25:54 -07:00
Elliott Hughes
aa836f7310 Reinstate the x86 dynamic linker warning for text relocations.
Bug: 11358761
Change-Id: I4fc56ce7d76c9703a307ddd4d371d5e98bc6f51d
2014-06-30 14:46:53 -07:00
Dmitriy Ivanov
e43c4a7a66 Disallow dlopen("egl/blah.so") on LP64
Bug: 7465467
Change-Id: Ibd3a4f1a6095f4397bde4f656e3c11b67f7edd47
2014-06-29 13:02:06 -07:00
Colin Cross
ddc449748b Merge "Revert "HACK: linker: check for handle==0xffffffff on LP64"" 2014-06-26 23:45:01 +00:00
Nick Kralevich
d81b3b275d Reenable support for non-PIE executables
On Nakasi builds, /system/bin/tf_daemon is a pre-compiled
vendor supplied binary. When support for non-PIE executables
was removed, that daemon failed to start, which induced
a number of bugs.

  * keystore is broken
  * CTS runs will hang after a certain period of time

Temporarily reenable non-PIE support for 32-bit platforms
until Nakasi is fixed.

This rolls back the following commits:

  Cleanup: updated comments
  * 6275f20834
  Cleanup: remove AARCH/ARM_COPY relocation support
  * b906e13c55

And restricts the following patch to 64 bit only:

  Remove support for non-PIE executables
  * 2aebf5429b

Bug: 14566672
Bug: 15086752
Bug: 15732002
Change-Id: Ia2501aa14bd30feb4a6ce66bdb7c9f066dba0b5f
2014-06-19 09:09:54 -07:00
Dmitriy Ivanov
ce44166c73 Fix weak function lookups
* Linker now correctly resolves function defined
   with __attribute__((weak)).

Bug: https://code.google.com/p/android/issues/detail?id=70206
Change-Id: I82efb905676c25fefb1b11a13f5fecb0f1384657
2014-06-17 16:18:18 -07:00
Colin Cross
acfc63760e Revert "HACK: linker: check for handle==0xffffffff on LP64"
This reverts commit 346fea0805.

Change-Id: Id3fd79451e4218e68e39ce22f21408cbf93255ee
2014-06-16 15:44:20 -07:00
Chris Dearman
9d98ee17fe [MIPS64] linker64 requires startup code
Change-Id: Iff2cd7d4dc40a67978bd9fc585b86e5a87afdbdd
2014-06-12 19:18:12 -07:00
Elliott Hughes
1a58629340 Remove an unused parameter from the dlopen implementation.
Change-Id: I9297913a743bb570b48ebbe594ff711a481e89e0
2014-06-03 16:23:08 -07:00
Elliott Hughes
d286796fce Turn on -Wunused and fix the mistakes it uncovers.
Change-Id: I023d2d8b547fbc21d4124bb7510d42b06a0dc501
2014-06-03 15:22:34 -07:00
Dmitriy Ivanov
ce00354fec Merge "Do not add arcs to the soinfo graph on dlopen" 2014-05-23 02:19:10 +00:00
Bjorn Andersson
3c005d6019 Do not add arcs to the soinfo graph on dlopen
While introducing RTLD_NOLOAD in b648a8a5 a change in how soinfo structs are
connected was also introduced. When calling dlopen the library that is loaded
is added as a child to the soinfo from which the caller comes - i.e. building a
dependency graph.

Unfortunately this shows issues upon unloading, such as blowing the stack if
there are loops in the graph.

This change reverts that part of b648a8a5, keeping everything as a child of the
root soinfo.

Change-Id: I604ee9210613b19f693a568158e69707620a95db
Signed-off-by: Bjorn Andersson <bjorn.andersson@sonymobile.com>
2014-05-22 19:08:14 -07:00
Elliott Hughes
2ea60ff0b4 Remove unnecessary #includes of <sys/atomics.h>.
Bug: 14903517
Change-Id: I7b5bcebe58774a441da986cc02376dd88e00ea0e
2014-05-22 11:00:21 -07:00
Dmitriy Ivanov
ca1c80220e Removed dlsym handle != NULL check for lp64
* Removed unnecessary NULL check in dlsym
 * Fixed dlsym_failure test to account for
   correct RTLD_DEFAULT value
 * Added temporary check for legacy RTLD_DEFAULT
   value for non-yet-recompiled binaries

Bug: 15146875
Change-Id: I089fa673762629f5724b6e4fbca019d9cfc39905
2014-05-21 22:42:24 -07:00
Colin Cross
346fea0805 HACK: linker: check for handle==0xffffffff on LP64
bionic RTLD_NEXT was changed from 0xffffffff to -1L, which breaks
existing binaries compiled.  Temporarily look either until we can
get recompiled binaries.

Bug: 15113039
Change-Id: I1568fa0e4a832c5e6df21da74a33b22bde7f16f6
2014-05-20 15:19:02 -07:00
Dmitriy Ivanov
f092feb81b Merge "Add R_X86_64_64 to the list of possible weak relocs" 2014-05-20 19:11:25 +00:00
Dmitriy Ivanov
b648a8a57e Add RTLD_NOLOAD support and some related changes.
* Aligned RTLD_ values with glibc for lp64
 * dlopen supports RTLD_NOLOAD flag
 * soinfo_unload calls find_library(.., RTLD_NOLOAD)
   instead of naive find_loaded_library_by_name()
 * dlopen changed to add child to caller soinfo instead
   of somain.

Bug: https://code.google.com/p/android/issues/detail?id=64069
Change-Id: I1a65f2c34f3e0edc6d2c41a2e408b58195feb640
2014-05-20 12:02:24 -07:00
Pavel Chupin
bb5bb2046f Add R_X86_64_64 to the list of possible weak relocs
Change-Id: I768a5948d89701a1719734954a3524d3c7187e6a
Signed-off-by: Pavel Chupin <pavel.v.chupin@intel.com>
2014-05-20 16:53:33 +04:00
Dmitriy Ivanov
489e498434 Fix lookup-by-base-name for lp64
Bug:https://code.google.com/p/android/issues/detail?id=6670
Change-Id: I5b70e7cde7f40799148aca0a91fb2bb08e0f2b54
2014-05-19 19:15:06 -07:00
Elliott Hughes
00c855eb3d Rethrow SIGTRAP too.
Bug: 15024256
Change-Id: I0347da9698a6ccd317ce6e6f7916d710d66e0f8a
2014-05-16 17:34:13 -07:00
Elliott Hughes
62e35755eb debugger.cpp should know the names of the signals it catches.
Change-Id: I37908b07739ad465652f143848c52bc1ef19e421
2014-05-16 16:59:54 -07:00
Dmitriy Ivanov
d59e50063a Improve detection of already loaded libraries
Linker is now able to resolve symlinked libraries correctly.

soinfo is extended to save the graph of dependencies during
load/unload. Dependencies are used only in CallConstructor.

Bug: 9741592
Change-Id: Id9c48a74c46aa89bcdf3d54ec2f8ba3d398130b1
2014-05-14 15:16:35 -07:00
Dmitriy Ivanov
6897b7b8b9 Merge "Fix for linker allocator" 2014-05-14 21:02:18 +00:00
Dmitriy Ivanov
1079406cab Fix for linker allocator
Change-Id: I18a3f1a8515657f0deb69266184fb516a27f90e8
2014-05-14 12:52:57 -07:00
Elliott Hughes
1728b23965 Switch to g_ for globals.
That's what the Google style guide recommends, and we're starting
to get a mix.

Change-Id: Ib0c53a890bb5deed5c679e887541a715faea91fc
2014-05-14 10:02:03 -07:00
Dmitriy Ivanov
c6b5834ceb Merge "Remove page level mprotects" 2014-05-14 01:45:50 +00:00
Dmitriy Ivanov
bc23e530c4 Remove page level mprotects
Freeing block mprotects on the page which it turn
may lead to application crash if linker subsequently
tries to modify another block on the page.

Bug: 14895266
Change-Id: I8ff7f5df467d7be184242de652032b3c84e24b76
2014-05-13 18:34:48 -07:00
Dmitriy Ivanov
d44927b8e9 Merge "Refactor linker allocator" 2014-05-13 15:49:18 +00:00
Dmitriy Ivanov
d597d263bc Refactor linker allocator
Makes it reusable for different fixed sized and not very
big structures (<PAGE_SIZE).

Change-Id: Id5ec13fc6541b1935ef7fe3671c22b98685abbae
2014-05-12 21:40:09 -07:00
Dmitriy Ivanov
6275f20834 Cleanup: updated comments
Bug: 14566672
Change-Id: I49ad28e3914b7d559db1e98542fee919db768f49
2014-05-12 11:47:10 -07:00
Dmitriy Ivanov
b906e13c55 Cleanup: remove AARCH/ARM_COPY relocation support
They are only legal for ET_EXEC binaries and these are no
longer supported.

Bug: 14566672
Change-Id: I99e0ff47e8c572db474bc5e52df870a72269abb3
2014-05-12 09:06:14 -07:00
Nick Kralevich
2aebf5429b Remove support for non-PIE executables
Don't support the dynamic linker loading ET_EXEC executables. Only
support ET_DYN executables.

Bug: 14566672
Change-Id: Ia1f2bfffe7ea867c1cd62e67d7fd637c60c0728d
2014-05-08 13:17:17 -07:00
Torne (Richard Coles)
9b5ee4aa85 Merge "Handle empty relro segment or incorrectly sized file." 2014-05-06 10:16:18 +00:00
Dmitriy Ivanov
5ca7ed9005 Disallow dlopen("egl/blah.so") on LP64
Change-Id: I9a563a9dada6522129b1890bc1292667230e80a5
2014-05-02 18:18:50 -07:00
Torne (Richard Coles)
26ec9679ff Handle empty relro segment or incorrectly sized file.
If the file has no relro segment, the generated relro file will have
length 0, which caused mmap to fail. If the relro file has nonzero size,
but is too short (e.g. because it's for the wrong version of the
library), the linker would segfault while comparing the data. Fix both
these issues: don't try to map a zero length file, and don't try to
compare data that would be beyond the end of the file.

Improve test to explicitly generate two versions of the library: one
with -z relro, and one with -z norelro, so we can test both cases; also
explicitly test the case where the relro file has length 0.

Bug: 14299541
Change-Id: Id8b95585edda90e8bb5de452a35b70ed2d224934
2014-05-02 14:25:45 +01:00
Elliott Hughes
b7e289ed02 Pass si_code through to debuggerd.
Because we re-raise various signals, we corrupt the si_code that debuggerd
sees when it ptraces our siginfo. One possible solution (shown here) is to
pass the original si_code value in the message we send to debuggerd.

Change-Id: I76f9aa2c0442e5cab611d132532409e700383907
2014-04-25 20:00:45 -07:00
Torne (Richard Coles)
0dcf06f976 Fix arm64/x86 build.
Add missing second param to soinfo_link_image in a section that's not
compiled on ARM.

Bug: 13005501
Change-Id: Id0ede8e03da4e05b25c0aeb24a840f868031d4e8
2014-04-22 11:59:26 +01:00
Torne (Richard Coles)
b1bfa7956c Merge "Allow sharing the RELRO section via a file." 2014-04-22 10:39:49 +00:00
Torne (Richard Coles)
c363e5dd0a Merge "Support loading libraries to a reserved address." 2014-04-22 10:33:34 +00:00
Torne (Richard Coles)
16f6429c38 Merge "Add android_dlopen_ext() interface to linker." 2014-04-22 10:33:07 +00:00
Elliott Hughes
8abf44c415 Merge "Make libc signal handler output more like debuggerd." 2014-04-19 02:02:05 +00:00
Elliott Hughes
17e6a98b48 Make libc signal handler output more like debuggerd.
This has been annoying me for a while, because it's often quite misleading.

Today, for example, I saw:

  Fatal signal 13 (SIGPIPE) at 0x6573 (code=0), thread 25971 (top)

where the apparent address is actually the pid of the signal source (in this
case the kernel on behalf of the thread itself).

This patch isn't as fancy as strace, but it at least means we never say
anything misleading. We could decode the si_code field like strace and
debuggerd, but I'm reluctant to do that without some way to share the code
between at least bionic and debuggerd.

Examples after:

  Fatal signal 13 (SIGPIPE), code 0 in tid 9157 (top)
  Fatal signal 11 (SIGSEGV), code 1, fault addr 0x0 in tid 9142 (crasher64)
  Fatal signal 6 (SIGABRT), code -6 in tid 9132 (crasher64)

(Note that the code still shows as 0 for SIGPIPE in the signal handler itself
but as -6 (SI_TKILL) in debuggerd; this is actually correct --- debuggerd is
showing the re-raised signal sent at the end of the signal handler that
initially showed the correct code 0.)

Change-Id: I71cad4ab61f422a4f6687a60ac770371790278e0
2014-04-18 17:54:51 -07:00
Du Chenyang
865119efd4 Temporarily disable text relocation warnings for x86 libraries
Too many such warnings will cause CTS failed. This issue still exists
in some x86 version libraries: libdvm.so/libart.so.

$scanelf -qT out/target/product/generic_x86/system/lib/libdvm.so
  libdvm.so: (memory/data?) [0x2BAC7] in (optimized out: previous dvmAsmInstructionStartCode) [0x2B2F8]
  libdvm.so: (memory/data?) [0x2BB98] in (optimized out: previous dvmAsmInstructionStartCode) [0x2B2F8]
  libdvm.so: (memory/data?) [0x2EB28] in (optimized out: previous dvmAsmInstructionStartCode) [0x2B2F8]
  libdvm.so: (memory/data?) [0x2EF87] in (optimized out: previous dvmAsmInstructionEndCode) [0x2EF63]
  libdvm.so: (memory/data?) [0x2EFAF] in (optimized out: previous dvmAsmInstructionEndCode) [0x2EF63]
  libdvm.so: (memory/data?) [0x2EFD7] in (optimized out: previous dvmAsmInstructionEndCode) [0x2EF63]
  libdvm.so: (memory/data?) [0x2EFFF] in (optimized out: previous dvmAsmInstructionEndCode) [0x2EF63]
  libdvm.so: (memory/data?) [0x2F027] in (optimized out: previous dvmAsmInstructionEndCode) [0x2EF63]

Bug: https://code.google.com/p/android/issues/detail?id=68431
Change-Id: I11ecac282f1163e49a82156fce2a76cc2d619960
2014-04-18 16:00:55 -07:00
Torne (Richard Coles)
183ad9df53 Allow sharing the RELRO section via a file.
Add flags and a file descriptor to android_dlopen_ext() to allow writing
the RELRO section of the loaded library to a file after relocation
processing, and to allow mapping identical pages from the file over the
top of relocated memory in another process. Explicitly comparing the
pages is required in case a page contains a reference to a symbol
defined in another library loaded at a random base address.

Bug: 13005501
Change-Id: Ibb5b2d384edfaa5acf3e97a5f8b6115c10497a1e
2014-04-17 14:30:46 +01:00
Torne (Richard Coles)
12bbb91645 Support loading libraries to a reserved address.
Add flags and parameters to android_dlopen_ext() to allow loading a
library at an already-reserved fixed address. If the library to be
loaded will not fit within the space reserved, then the linker will
either fail, or allocate its own address space as usual, according to
which flag has been specified. This behaviour only applies to the
specific library requested; any other libraries loaded as dependencies
will be loaded in the normal fashion.

There is a new gtest included to cover the functionality added.

Bug: 13005501
Change-Id: I5d1810375b20fc51ba6a9b3191a25f9792c687f1
2014-04-17 14:22:17 +01:00
Torne (Richard Coles)
012cb4583a Add android_dlopen_ext() interface to linker.
Add a function "android_dlopen_ext()", defined in <android/dlext.h>.
This is an extended version of dlopen() which takes a struct for passing
additional parameters for Android-specific functionality. This will be
used to support RELRO section sharing between separate processes.

Bug: 13005501
Change-Id: I9c99b2f2a02ee329dedaeba09ef3a1113b17b2d6
2014-04-17 13:50:55 +01:00
Elliott Hughes
88b44feb7d Remove duplicate line in linker/Android.mk.
Change-Id: I7b4d5fcdfacc840bbda4ffd965e5315c4651cfe5
2014-04-01 11:41:36 -07:00
Christopher Ferris
c19972a4ca Merge "Use __unused instead of UNUSED in linker.cpp" 2014-03-30 22:24:22 +00:00
Colin Cross
406a75d371 linker: use LOCAL_MULTILIB := both style to build linker64
Use LOCAL_MODULE_STEM_32 and LOCAL_MODULE_STEM_64 to build
linker and linker64.  Set LOCAL_MULTILIB := both for consistency
with other rules of this type, although LOCAL_MULTILIB := both is
only consumed by executable.mk which is skipped by
linker_executable.mk.  Duplicate the necessary new parts of
executable.mk.

Change-Id: I888e87cf125cfbcfdee6a55b6377d8bc5ce402ea
2014-03-27 10:45:57 -07:00
Kito Cheng
812fd4263a Use __unused instead of UNUSED in linker.cpp
- sys/cdefs.h already define __unused, just use it
   instead of define a local one.

Change-Id: Iacf3da9193e65e1f34b12760b28bcb64b67cb790
2014-03-25 22:54:19 +08:00
Elliott Hughes
851e68a240 Unify our assembler macros.
Our <machine/asm.h> files were modified from upstream, to the extent
that no architecture was actually using the upstream ENTRY or END macros,
assuming that architecture even had such a macro upstream. This patch moves
everyone to the same macros, with just a few tweaks remaining in the
<machine/asm.h> files, which no one should now use directly.

I've removed most of the unused cruft from the <machine/asm.h> files, though
there's still rather a lot in the mips/mips64 ones.

Bug: 12229603
Change-Id: I2fff287dc571ac1087abe9070362fb9420d85d6d
2014-02-20 13:51:26 -08:00
Benjamin Adolphi
006f9ad891 Linker writes to wrong memory location when processing DT_MIPS_RLD_MAP
When bionic's dynamic linker processes the .dynamic section of a MIPS ELF binary and encounters the DT_MIPS_RLD_MAP dynamic array tag, it calculates the address of where to write a pointer to the _r_debug structure. The current implementation simply reads the value given in the d_ptr field and writes the pointer address to that location. However, this value has to be adjusted to reflect the real load address of the binary. Otherwise the linker will write to a faulty location possibly resulting in a crash when linking a MIPS binary that includes DT_MIPS_RLD_MAP. This change corrects that problem.

Change-Id: I1a91874f7ab47289001fe72d9016660c14c70362
Signed-off-by: Benjamin Adolphi <b.adolphi@gmail.com>
2014-02-19 00:50:32 +01:00
Colin Cross
36ee4ab243 build linker and linker64 on 64-bit architectures
Change-Id: I400bbaf5a779fc427de4c3d86c66548b0179b10d
2014-02-13 11:18:47 -08:00
Elliott Hughes
c62b8a4d3f Remove unused variables not spotted by GCC.
Change-Id: I49a16096bc0f41f3ad0007249161e8bdfcf3438c
2014-02-12 17:17:41 -08:00
Elliott Hughes
faf05bacd4 Clean up all the lint cpplint can find in the dynamic linker.
Change-Id: Ic9ee7153817c22a252cc4b309283e355b623cab9
2014-02-11 17:33:49 -08:00
Chris Dearman
9918665a45 [MIPS64] Dynamic linker
Change-Id: I937c7c776cae3d66e214798d5217a922cd106bfc
Signed-off-by: Chris Dearman <chris.dearman@imgtec.com>
Signed-off-by: Duane Sand <duane.sand@imgtec.com>
2014-02-11 15:33:14 -08:00
Elliott Hughes
0266ae5f88 Switch <elf.h> over to linux uapi under the covers.
Remove the linker's reliance on BSD cruft and use the glibc-style
ElfW macro. (Other code too, but the linker contains the majority
of the code that needs to work for Elf32 and Elf64.)

All platforms need dl_iterate_phdr_static, so it doesn't make sense
to have that part of the per-architecture configuration.

Bug: 12476126
Change-Id: I1d7f918f1303a392794a6cd8b3512ff56bd6e487
2014-02-10 18:22:24 -08:00
Elliott Hughes
3a9c5d66dc Fix <link.h>.
Also move some of the stuff that should be in <link.h> out of the
private "linker.h", to make it clearer that these are public API
known to gdb that we can't change.

Bug: 12554197
Change-Id: I830e1260d3d8b833ed99bc1518f1c6b6102be8af
2014-02-10 13:31:13 -08:00
Elliott Hughes
62e9c76ee8 Clean up debugger.cpp slightly.
In particular, don't do weird things with 'int tid'.

Change-Id: I0fd9158a452967163508ada8987de9494ad5f9af
2014-01-31 17:27:00 -08:00
Elliott Hughes
f858bd1c6e LP64 binaries should talk to debuggerd64.
Change-Id: I7eb30f9d04f80b6b45d3148757970d3f1117493c
2014-01-31 16:56:39 -08:00
Weiwu Chen
5ceb889ac9 bionic: Change the type of soinfo's size to size_t
Some system functions like munmap expect soinfo's size to be size_t, but currently
it is unsigned. Change it to size_t to fit 64bit's portability.

Change-Id: I0bf6d522b38b0cd9bf1db05b004b5326217412a2
Signed-off-by: Weiwu Chen <weiwu.chen@intel.com>
Signed-off-by: Qiming Shi <qiming.shi@intel.com>
2014-01-28 11:54:01 -08:00
Qiming Shi
4041b13c20 bionic: Do not use magic number for portability
Do not use the magic number 0xFFFFFFFFU to represent the max value of an address
as it's not correct on 64bit platform. We should use UINTPTR_MAX instead.

Change-Id: I1fc6f5864a651b2eddea2333cb0788f9d9223270
Signed-off-by: Qiming Shi <qiming.shi@intel.com>
Signed-off-by: Weiwu Chen <weiwu.chen@intel.com>
2014-01-27 14:51:07 -08:00
Colin Cross
d1973ca513 bionic: rename aarch64 target to arm64
Rename aarch64 build targets to arm64.  The gcc toolchain is still
aarch64.

Change-Id: Ia92d8a50824e5329cf00fd6f4f92eae112b7f3a3
2014-01-23 18:35:39 -08:00
Elliott Hughes
a4aafd1560 Make it possible for code to query the dynamic linker's default search path.
We're not going to have init(1) set LD_LIBRARY_PATH globally on 64-bit.
This patch makes it possible for libnativehelper to set LD_LIBRARY_PATH
in each Java VM (to support System.loadLibrary) without also hard-coding
the default search path there.

Change-Id: If13961fae976e06dd80d5ef522f31e8b7eb01154
2014-01-13 16:37:47 -08:00
Elliott Hughes
7ff07ad321 Add -Bsymbolic to the ld flags when linking the dynamic linker.
We don't need this on architectures other than aarch64, and
we're still investigating why we need it on aarch64, but it
doesn't seem unreasonable to have this flag set when linking
the dynamic linker anyway; it's clearly the intended behavior.

Change-Id: I4fa1b4ae543a818979934bf818eabac03bb9154f
2014-01-13 13:33:01 -08:00
Elliott Hughes
1272dbd1d7 Add NT_PRSTATUS to <elf.h>.
Needed by aarch64.

Bug: 12476126
Change-Id: I7764664459a06cf4f2a60e707bd968d321a78430
2014-01-09 15:45:07 -08:00
Elliott Hughes
54a7494f17 Regenerate the NOTICE files.
Also standardize the orthography in a few places to reduce near-duplicates
in the NOTICE files.

Change-Id: I347c75e817be61ec1b9c5b4b96226feedc8d09ab
2014-01-07 13:46:11 -08:00
Elliott Hughes
b93702a046 Improve dynamic linker diagnostics for internal errors.
If the linker can't resolve its own internal references to symbols,
we currently exit silently (albeit with EXIT_FAILURE). Not very helpful.

Change-Id: I1614fc970dee4560b38832ede1987b65a8e53a1e
2013-12-22 19:38:42 +00:00
Marcus Oakland
e365f9d654 AArch64: Linker64 support for AArch64
Addition of support for AArch64 in the linker64 target.

Change-Id: I8dfd9711278f6706063e91f626b6007ea7a3dd6e
Signed-off-by: Marcus Oakland <marcus.oakland@arm.com>
2013-12-17 15:02:43 -08:00
Pavel Chupin
5407eed84b Fix debugging issues in vdso handling
Under valgrind ehdr_vdso is null and causing segfault.
Adding debug info for vdso producing plenty of issues on debugging
through gdbserver, removing it. It doesn't seem it should be here.

Unwinding through vdso test still works.

Change-Id: I1a7e233c493f2268d725fa8d7279822d07decc49
Signed-off-by: Pavel Chupin <pavel.v.chupin@intel.com>
2013-12-12 11:18:46 -08:00
Sergey Melnikov
ebd506c69e Fix linker crashes during unknown symbol lookup
Integration of kernel VDSO into internal bionic data structures using
common functions.
Fix for dl_iterate_phdr function: the function provides incorrect
address of object in case of nonzero virtual and base addresses.
Location in address space of a particular program header should be
calculated using the formula:  addr = base_addr + virtual_addr.

Signed-off-by: Sergey Melnikov <sergey.melnikov@intel.com>
Change-Id: Ie2ab4257fd456242aab8afed0bd5bd6b29e81d6d
2013-10-31 15:06:20 -07:00
Elliott Hughes
74ce45972d Update <sys/exec_elf.h> to get the DF_* flags.
Change-Id: Ia9e785f6b95122f94ee3b01a312db1d5bb91a72e
2013-10-28 14:59:41 -07:00
Elliott Hughes
e4d792adb8 Don't allow text relocations on 64-bit.
I've also updated our <sys/exec_elf.h> to match upstream.

Change-Id: I52f9fce3167541811208d273ff23ceaa112f7135
2013-10-28 14:34:56 -07:00
Elliott Hughes
4eeb1f12a8 Clean up linker architecture macros.
We don't need our own architecture macros; the standard ones will do.

This patch also fixes some __x86_64__ tests to be USE_RELA tests instead,
because they're not actually x86_64-specific.

I've cleaned up architecture-specific code slightly so where possible
all the code corresponding to a particular architecture is together.

This patch also fixes a bug in LP64 DT_PLTGOT handling, which should be
an error rather than falling through into DT_DEBUG! There was another #ifdef
bug where we'd only report unexpected DT_ entries on MIPS.

Change-Id: Id1d04e372611f641c1aa278a18e379f28af9eaf5
2013-10-28 11:02:49 -07:00
Elliott Hughes
60d5b06ece Simplify defining the linker architecture macro.
Like the new TODO says, though, do we need this at all? Wouldn't we be better
off just using the regular architecture-specific macros? This is a dynamic
linker, so there's never a possibility of cross-linking.

Change-Id: I7be6b8663f5e585c4024a49aae383430c86a3c1b
2013-10-24 23:18:13 -07:00
Elliott Hughes
b8b0b6b412 Revert "Don't warn about x86 text relocations. They're too prevalent."
This reverts commit 5be2c5998c.

Change-Id: I3fc8ca530cdbd74c834fb9cfabe812c9386419fc
2013-10-24 22:58:28 +00:00
Elliott Hughes
5be2c5998c Don't warn about x86 text relocations. They're too prevalent.
We should fix this (and disallow it for x86_64), but for now let's get CTS
running again.

libdvm.so and libcutils.so are the main problems.

$ scanelf -qT out/target/product/generic_x86/symbols/system/lib/libcutils.so
  libcutils.so: (memory/data?) [0x4125] in (optimized out: previous android_memset16) [0x4100]
  libcutils.so: (memory/data?) [0x424F] in (optimized out: previous android_memset16) [0x4100]
  libcutils.so: (memory/data?) [0x42F8] in (optimized out: previous android_memset16) [0x4100]
  libcutils.so: (memory/data?) [0x4349] in (optimized out: previous android_memset16) [0x4100]
  libcutils.so: (memory/data?) [0x4406] in (optimized out: previous android_memset16) [0x4100]
  libcutils.so: (memory/data?) [0x45AC] in (optimized out: previous android_memset32) [0x4590]
  libcutils.so: (memory/data?) [0x4650] in (optimized out: previous android_memset32) [0x4590]
  libcutils.so: (memory/data?) [0x46F9] in (optimized out: previous android_memset32) [0x4590]
  libcutils.so: (memory/data?) [0x474A] in (optimized out: previous android_memset32) [0x4590]
  libcutils.so: (memory/data?) [0x4807] in (optimized out: previous android_memset32) [0x4590]

Bug: 11353056
Change-Id: Id4a76b310be7fe858a8a60d0d260b09913b66be9
2013-10-23 13:45:01 -07:00
Nick Kralevich
3d4470c14a change wording on text relocation message.
The current message is too alarmist.

Change-Id: I53e8eadca239f867b4e6b9c193eba96e267950c3
2013-10-22 12:06:36 -07:00
Elliott Hughes
2258347f3b Build the linker with the same -std flags as the rest of bionic.
Change-Id: I5bdb28ecfdf78a90f6b072077a1c5ffd63f5d2ae
2013-10-17 13:06:20 -07:00
Elliott Hughes
41b87c6512 Merge "x86_64: Add R_X86_64_64 relocation handling" 2013-10-17 19:51:11 +00:00
Elliott Hughes
c7e9b23317 Fix sigaction(3) for 64-bit.
Also clean up <signal.h> and revert the hacks that were necessary
for 64-bit in linker/debugger.cpp until now.

Change-Id: I3b0554ca8a49ee1c97cda086ce2c1954ebc11892
2013-10-17 11:36:55 -07:00
Pavel Chupin
c075c18537 x86_64: Add R_X86_64_64 relocation handling
Change-Id: I86ffc56fa6a9053bed44e92a579530c2beb8eb2c
Signed-off-by: Pavel Chupin <pavel.v.chupin@intel.com>
2013-10-16 19:13:58 +04:00
Pavel Chupin
1a57f9f75c x86_64: Rename 64-bit linker to linker64
That's for having both on the same system.

Change-Id: Ic2bc2c015e6486e8b6a7576f7b28d2d027534368
Signed-off-by: Pavel Chupin <pavel.v.chupin@intel.com>
2013-10-09 16:50:30 -07:00
Elliott Hughes
eb847bc866 Fix x86_64 build, clean up intermediate libraries.
The x86_64 build was failing because clone.S had a call to __thread_entry which
was being added to a different intermediate .a on the way to making libc.so,
and the linker couldn't guarantee statically that such a relocation would be
possible.

  ld: error: out/target/product/generic_x86_64/obj/STATIC_LIBRARIES/libc_common_intermediates/libc_common.a(clone.o): requires dynamic R_X86_64_PC32 reloc against '__thread_entry' which may overflow at runtime; recompile with -fPIC

This patch addresses that by ensuring that the caller and callee end up in the
same intermediate .a. While I'm here, I've tried to clean up some of the mess
that led to this situation too. In particular, this removes libc/private/ from
the default include path (except for the DNS code), and splits out the DNS
code into its own library (since it's a weird special case of upstream NetBSD
code that's diverged so heavily it's unlikely ever to get back in sync).

There's more cleanup of the DNS situation possible, but this is definitely a
step in the right direction, and it's more than enough to get x86_64 building
cleanly.

Change-Id: I00425a7245b7a2573df16cc38798187d0729e7c4
2013-10-09 16:00:17 -07:00
Elliott Hughes
2a0b873065 Fix __errno for LP64 and clean up __get_tls.
If __get_tls has the right type, a lot of confusing casting can disappear.

It was probably a mistake that __get_tls was exposed as a function for mips
and x86 (but not arm), so let's (a) ensure that the __get_tls function
always matches the macro, (b) that we have the function for arm too, and
(c) that we don't have the function for any 64-bit architecture.

Change-Id: Ie9cb989b66e2006524ad7733eb6e1a65055463be
2013-10-09 13:39:13 -07:00
Elliott Hughes
011bc0ba45 Use /system/lib64 and /vendor/lib64 for 64-bit libraries.
Change-Id: I4886aeb3070bf97b4cfe8053388ecb1bda288017
2013-10-08 14:27:10 -07:00
Elliott Hughes
0f395b7ba0 Make logging fall back to /dev/stderr if we're on the host.
Otherwise you get no logging, which sucks.

Change-Id: Iea1e8f996461afbb217a55711b7967005c39cfcb
2013-10-08 13:19:00 -07:00
Elliott Hughes
d7398f146d Use linker64 for the 64-bit linker.
Change-Id: I13fc7f93274f99e4cf99b077afdf5293e7233f39
2013-10-08 10:05:05 -07:00
Elliott Hughes
afac15d686 Use C99 structure initializer designator style.
clang warns about using the GCC style of designator.

Change-Id: I86ec79f06c8774618082859f48d7d1f576520e32
2013-10-08 10:01:09 -07:00
Elliott Hughes
c00f2cb587 x86_64 linker.
Based on I8dc3e2cb596f75dc58ae82e4dc58f8c177dd3323 by
Pavel Chupin <pavel.v.chupin@intel.com>.

Change-Id: Icd582d277cbe273477b450f2848343d72c86ec9f
2013-10-08 09:57:01 -07:00
Stephen Hines
99f0e1a329 Fix Clang warning since KernelArgumentBlock is actually a class.
Change-Id: Id72868d80feffbbc5f7d1e43beaed5d4e4d95f52
2013-10-08 00:08:13 -07:00