Commit Graph

705 Commits

Author SHA1 Message Date
Dimitry Ivanov
e371ae68ac Merge "Allow dlopening public libs using absolute path" 2015-12-05 05:25:57 +00:00
Dimitry Ivanov
22840aab47 Allow dlopening public libs using absolute path
dlopen on isolated namespaces should be able to open
public libraries using absolute path not only soname.

Bug: http://b/25853820
Change-Id: If574a67853dc51226f0f376e9e2d108316002f84
2015-12-04 21:21:35 -08:00
Elliott Hughes
939a7e0119 Track rename from base/ to android-base/.
Change-Id: I0a4592945400b1fa6892bf7c1fa8659fd711efa3
2015-12-04 15:27:46 -08:00
Dmitriy Ivanov
1ffec1cc4d Introduce anonymous namespace
The anonymous namespace is introduced to
handle cases when linker can not find the
caller. This usually happens when caller
code was not loaded by dynamic linker;
for example mono-generated code.

Bug: http://b/25844435
Bug: http://b/22548808
Change-Id: I9e5b1d23c1c75bc78548d68e79216a6a943a33cf
2015-11-23 16:13:10 -08:00
Dmitriy Ivanov
3c5248182e Handling invalid section headers
The linker crashes if native library has invalid section
headers. This change adds boundary checks on target offsets
and generates dlerror instead of crash.

Bug: http://b/25800330
Change-Id: Ibe282029997302b9b557637c3aad064d7d0febc5
2015-11-22 23:25:06 -08:00
Dmitriy Ivanov
84bab5a955 Move some utility functions to linker_utils
Also adds unit-tests for page_start, page_offset, and safe_add

Change-Id: Ia1325b4682d367328a01599a19848e4ffcd2c0ea
2015-11-20 21:37:51 +00:00
Dmitriy Ivanov
b76123fed8 Improve error message for files with no sections
Bug: http://b/25801618
Change-Id: I4f4f368e727ff48c84781279e3d17d4ac2d1b6b0
2015-11-20 10:49:12 -08:00
Hung-ying Tyan
0ebe2f07c3 Merge "Add /odm/lib to shared lib search path" 2015-11-19 16:38:51 +00:00
Junichi Uekawa
313632db57 Merge "Do not depend on host bits to get the right size to write." 2015-11-19 12:44:19 +00:00
Junichi Uekawa
ff35b1e659 Do not depend on host bits to get the right size to write.
x86_64 32-bit or 64-bit relocations do not depend on ELF bit size, they
are 32-bit or 64-bit respectively.

Known compiler that emits such code is nacl-clang which emits
R_X86_64_PC32 which should write 32 bits but ended up writing 64 bits.

Change-Id: Ibb6b484c0fea6a7e291362148e8ac749d6674529
2015-11-19 11:28:20 +09:00
Hung-ying Tyan
f74b041cce Add /odm/lib to shared lib search path
ODM's shared libs should live in /odm/lib on the ODM partition.

BUG: 25654402
Change-Id: I3f5c26f208af87ff2817e490e51d0b4f5b8ec98e
2015-11-18 23:45:25 +08:00
Dmitriy Ivanov
3cc35e224c Ignore target sdk version for the public namespace
This fixes the bug with using the libraries loaded
prior to android_set_target_sdk_version call.

Bug: http://b/22548808
Change-Id: I3ca2d367b0fa930a437bbb65f780834803d2ef0a
2015-11-17 18:45:12 -08:00
Dmitriy Ivanov
fbfba64068 Remove the warning about empty LD_LIBRARY_PATH
Change-Id: I3eca11512d8055ab94dd0a6badcd83ce6440d675
2015-11-16 14:23:37 -08:00
Dmitriy Ivanov
d9b08a0bc0 Fix arm64 and x86 builds
Change-Id: Ic3746b2f200f42218b6ac857c1631e873c767c17
2015-11-16 13:17:27 -08:00
Dmitriy Ivanov
42d5fcb9f4 Introducing linker namespaces
Bug: http://b/22548808
Change-Id: Ia3af3c0a167f1d16447a3d83bb045d143319b1e1
2015-11-15 12:09:16 -08:00
Dmitriy Ivanov
fd7a91e692 linker: cleanup solist after unsuccessful read
Bug: http://b/25560017
Change-Id: I03c5a1d7aed34c480d341aacfb3b1afdfa037b99
2015-11-06 10:44:37 -08:00
Dmitriy Ivanov
7a9311f7f1 Fix linked_list::remove_if()
When remove_if removes last element from the list
following push_back stops working.

Change-Id: Ia3e92763b83a2e172eaa10de7aecfb7a4be452d7
2015-11-05 17:41:05 -08:00
Dmitriy Ivanov
126af757c6 Implement load at fixed address feature
Bug: http://b/24683631
Change-Id: I3a39ab526c8f9e213339b60e135e5459d0f41381
2015-10-27 11:27:34 -07:00
Dmitriy Ivanov
4f7a7ad3fe Implement Library Load Order Randomization
Bug: http://b/24047022
Change-Id: I36e05b403bfbaae8542a95147f9114a8b9c8ac0e
2015-10-22 18:26:07 -07:00
Dmitriy Ivanov
cf1cbbe432 refactoring: introduce MappedFileFragment
Change-Id: I97b0c1131711ed0ac13ab33e3357e99e0b6b1a4e
2015-10-22 18:01:56 -07:00
Mike Frysinger
747d30ebf3 dlfcn: update ifdef around old_name_
Commit 9185e04f72 changed the ifdef around
old_name_ from __arm__ to __work_around_b_###__, but missed one place in
dlfcn.cpp.  So if you do a build w/out that workaround for arm, you end
up with a build failure:
bionic/linker/dlfcn.cpp:275:27: error: no member named 'old_name_' in 'soinfo'
    strlcpy(__libdl_info->old_name_, __libdl_info->soname_, sizeof(__libdl_info->old_name_));
            ~~~~~~~~~~~~  ^
bionic/linker/dlfcn.cpp:275:82: error: no member named 'old_name_' in 'soinfo'
    strlcpy(__libdl_info->old_name_, __libdl_info->soname_, sizeof(__libdl_info->old_name_));
                                                                   ~~~~~~~~~~~~  ^

Bug: 24425865
Change-Id: Idbe1cc1c28083afeee6d90203c221f30f661c69c
2015-10-20 14:06:25 -04:00
Dimitry Ivanov
5fd94dfe3b Merge "Replace auto -> const auto&/auto&&" 2015-10-16 20:37:34 +00:00
Dimitry Ivanov
9c2122e803 Merge "Fix R_AARCH64_ABS/PREL relocations" 2015-10-16 20:36:25 +00:00
Dmitriy Ivanov
77f91c6d99 Fix R_AARCH64_ABS/PREL relocations
According to specification arm64 relocations
should not use *reloc value.

See http://infocenter.arm.com/help/topic/com.arm.doc.ihi0056b/IHI0056B_aaelf64.pdf
section 4.6.5

Bug: http://b/24977219
Bug: http://b/24527155
Change-Id: I3813255771f408ba957963c6ad56ed08e5110d83
2015-10-16 10:42:16 -07:00
Dmitriy Ivanov
4e50d0247b Ensure that readlink has access to /proc/self/fd
/proc/self/fd is not available when PR_DUMPABLE is set to 0
which is default for the user builds. It leads to permission
denials on readlink.

This change fixes the problem by setting PR_DUMPABLE flag to 1
for readlink and restoring it's previous value after the call.

Bug: http://b/24912743
Change-Id: I3fd179c5c6b56af96d6a15ee597024ccb15e1a13
(cherry picked from commit cf92738fa5)
2015-10-14 18:24:54 -07:00
Dmitriy Ivanov
fae39d2bf9 Log dlopen failures caused by text relocations
Some apps will fail to load native libraries with
text relocations when switching target sdk version to M.
It could be hard to diagnose because some of them
suppress dlerror and/or UnsatisfiedLinkError.

This change unconditionally logs the error message making
the cause of the failure more visible to developers.

Bug: http://b/24876001
Change-Id: I0477a0d1307d0879000f3a3a43b974b4cf34bdb2
(cherry picked from commit f32b689d3d)
2015-10-13 15:48:57 -07:00
Dmitriy Ivanov
5dce8948b6 Replace auto -> const auto&/auto&&
Change-Id: Ie484e5a296b5dd222a9545d8539d40d97a6c158c
2015-10-13 12:14:16 -07:00
Lazar Trsic
6f2d3104c8 Correctly resolve realpath for absolute paths
Introduced by: https://android-review.googlesource.com/174475

Change-Id: I44e00040b28be167d5141454f919340afec6084e
2015-10-13 10:57:41 -07:00
Dmitriy Ivanov
b28ffc7744 linker: Switch to clang
x86_64 gcc exports malloc/free and co functions because they
are defined with visibility "default" somewhere in gcc builtins;
and vector d-tors for some reason. Switching to clang fixes
this problem.

Bug: http://b/24785482
Change-Id: I741503b4b446523e7ff3fb16de13ed99991fd0c0
2015-10-12 18:20:26 -07:00
Josh Gao
93c0f5ee00 Move VDSO pointers to a shared globals struct.
Change-Id: I01cbc9cf0917dc1fac52d9205bda2c68529d12ef
2015-10-09 15:59:04 -07:00
Dmitriy Ivanov
8068786ae6 Remove textrels support for platform libs
Bug: http://b/20013628
Change-Id: Ia9382c7113e09bb6aed65072543e4ebe33026cf8
2015-10-09 13:59:42 -07:00
Dmitriy Ivanov
a1feb117e4 Make dt_runpath work for libraries opened from apk
This patch also fixes realpath for libraries opened directly
from apks.

Bug: http://b/21960914
Bug: http://b/21961857
Change-Id: I35ade661c87f1d448191f385811f6e9fd3cacf11
2015-10-07 11:44:53 -07:00
Dmitriy Ivanov
a0f187bec7 Fix linker tests
Change-Id: I4794f2d9dcc5ceb419e1bf9151607a650eb801d9
2015-10-05 12:06:40 -07:00
Dmitriy Ivanov
7e039937b8 Fix the comment
Change-Id: Ic8126cf92d12851cccaa3e2e781f075c9f6c283a
2015-10-01 14:02:19 -07:00
Dmitriy Ivanov
b48275045d Optimize dlopen from a zip file
This change makes dynamic linker reuse ZipArchiveHandles in
ld_library_path on dlopen to optimize the lookup of dt_needed
libraries.

Bug: http://b/21960534
Change-Id: I65f897910d46dd2ffabdcb0b7842db2f127eee30
2015-09-30 10:47:11 -07:00
Dmitriy Ivanov
280d54680d Fix bug number for linker related workarounds
Bug: 24425865
Change-Id: I2021674a9df0e768f312ca024d906302db1c494f
2015-09-28 10:31:12 -07:00
Douglas Leung
dccc40883a Fix mips FP abi bug in the linker.
Change-Id: I1ffab938eb06f9dc0963ee15bc10eca216618792
2015-09-17 15:17:06 -07:00
Dmitriy Ivanov
edfc9f63a2 linker: don't pass dlextinfo to dependent loads
Don't pass the parent load's dlextinfo to dependent loads, since this
causes the linker to try to load the dependencies using the same
addresses/relro/fds/etc as the main library, which is never going to
work. This was how it worked before ae69a95 which broke this.

Bug: http://b/23742664
Bug: http://b/20948231
Bug: http://b/20841817
Change-Id: I340ebae1127666d5c6c6f9c6521b89fb93f15bdd
2015-09-02 16:32:02 -07:00
Elliott Hughes
44ead71726 Regenerate NOTICE files.
Change-Id: Ia5c340220bb75e4e3166cc483ea77d19cfb08a71
2015-08-28 20:23:52 -07:00
skvalex
93ce35434c Fix a mistype in segment overrange checking
Change-Id: Ibea93514aa7ba3b1ac2bc00420f5124fb34f5f66
Signed-off-by: skvalex <skvalex@gmail.com>
2015-08-20 01:06:42 +03:00
Ying Wang
d1afa661af Don't attach linker_asan to linker in module definition.
With this change, we only define the rules to create the symlinks in
this Android.mk but without attaching the symlinks to the module linker.
Instead the core build system will set up the dependency whenever a
module needs these symlinks.

Bug: 22850550
Change-Id: I36c58fd411f1c27f3f638b229699d7dc1d66abb2
2015-08-17 16:17:03 -07:00
Dan Albert
5341691955 Move up to C++14.
The default standard version is now ahead of us. Stop specifying C++11
so we get that too.

Change-Id: Ic96942cd7fd134118e29b744601b0119e49b6ac4
2015-08-10 16:40:06 -07:00
Duane Sand
0acb15ead6 [MIPS] Link .dex or .oat code lacking .MIPS.abiflags segment
This corrects an issue with mips32 Art on mips64r6 Android, where
Java ran slowly due to unintended use of kernel-trap emulation of
single-precision floating point registers. This also regressed all
Art tests due to an extra logcat line
    WARNING: linker: Using FRE=1 mode to run "..."

When targeting mips32r6, Art generates modeless or FR=1 floating point
code, same as Android's own native mips32r6 modules. So the trapping was
unneeded. Linker was confusing Art-generated modules with those from
old NDK compilers, which do need that trapping mode.

This linker filename check may become unnecessary, if Art learns how to
generate .MIPS.abiflags segments in its generated elf-like codefiles.

Change-Id: I18069d1234960c680c5df739514da09015a7fdb6
2015-07-31 13:55:42 -07:00
Elliott Hughes
9f03ed12a6 Stop sending SIGPIPE to debuggerd.
SIGPIPE is a pretty normal way for command-line apps to die, but because
we catch it and report it via debuggerd, we get a lot of bogus bugs. We
could catch SIGPIPE in our tools, but that's not really legit and slightly
misleading.

"But", you say, "catching SIGPIPE is useful for app bugs!". Except a trawl
through buganizer suggests it's misleading there too. Not least because
it's usually an innocent victim that dies --- the problem is usually on the
other end of the pipe (which you learn nothing about because that process
already died, which is what closed the pipe).

We also don't catch SIGALRM, which is another signal that will terminate
your process if you don't catch it, but that one actually represents a
logic error in the crashing process, so there's a stronger argument for
catching that. (Except it too is not a real source of bugs.)

Bug: http://b/20659371
Change-Id: I79820b36573ddaa9a7bad0561a52f23e7a8d15ac
2015-07-29 22:24:13 -07:00
tony.ys_liu
b447440a4b Prevent buffer over-read in linker.cpp's parse_path.
Also, the old behavior of skipping empty entries doesn't match glibc.

Change-Id: I497774377113ab6c5d962e0f20066e2192748f06
2015-07-29 17:21:30 -07:00
Elliott Hughes
afab3ffcce Move PAGE_MASK into <sys/user.h>.
I'm removing the TODO on the assumption that being compatible with glibc
is more useful than BSD. The new internal "bionic_page.h" header factors
out some duplication between libc and the linker.

Bug: http://b/22735893
Change-Id: I4aec4dcba5886fb6f6b9290a8f85660643261321
2015-07-28 14:58:37 -07:00
Dmitriy Ivanov
ec83a61c8b Restore protection flags for ifunc during relocs.
IFUNC relocations require executable flag for the load
segment containing .text. When dso has text relocs linker
removes exec which causes crash during ifunc relocations.

This patch fixes this problem by restoring segments protection
for ifunc relocs.

Bug: http://b/22611399
Change-Id: Icbf3be0fec0e42bf805bcad7533e2032a2e11b9c
(cherry picked from commit de0fb393ae)
2015-07-26 08:23:01 -07:00
Elliott Hughes
d29486343a Use a less misleading name for the code that sets up the main thread.
Change-Id: I50c1b0a3b633cf8bc40a6bd86f12adb6b91e2888
2015-07-21 11:57:09 -07:00
Dmitriy Ivanov
e5cfafe344 Fix potential race condition on dlopen
Call to find_containing_library should be guarded.

Change-Id: I985a903da48b83bcd35e957a979158eb9b80e70b
2015-07-17 10:36:10 -07:00
Dmitriy Ivanov
730ed9dfec Add constant for zip separator
Change-Id: I1dcbb15ac612fc28e922eb3de8148fcaebbc0820
2015-07-16 04:52:06 -07:00