| 3a7ea52f17b68f62fa088d57f96ff24a76f50ea2 |
|
04-Apr-2012 |
Nick Kralevich <nnk@google.com> |
linker: enable -fvisibility=hidden
Compile the linker with -fvisibility=hidden. This reduces the number
of symbols that show up in the .dynsym section of the linker.
These symbols are never exported to other applications.
In particular, this fixes a problem with setting -DLINKER_DEBUG=1
introduced in 468319ce4f3f7383d788b76c09cda2a405311f36.
Because the symbols "debug_verbosity" and "format_log" have not been
resolved before the linker links itself, any attempt to call
PRINT / INFO / TRACE / WARN / ERROR will result in a segfault.
This change allows the static linker to produce a relative reference
to these symbols rather than relying on relocation.
This also has a nice side effect of making the linker slightly smaller
and slightly more optimized.
The following symbols no longer in the .dynsym section of the linker
after this change:
-addr_to_name
-call_constructors_recursi
-calloc
-debugger_init
-debugger_signal_handler
-debug_verbosity
-dladdr
-dlclose
-dlerror
-dl_lock
-dlopen
-dlsym
-dl_unwind_find_exidx
-find_containing_library
-find_containing_symbol
-find_library
-format_buffer
-free
-libdl_info
-linker_env_get
-linker_env_init
-linker_env_secure
-linker_env_unset
-linker_get_error
-__linker_init
-lookup
-lookup_in_library
-malloc
-notify_gdb_of_libraries
-notify_gdb_of_load
-notify_gdb_of_unload
-realloc
-rtld_db_dlactivity
-unload_library
-vsnprintf
Bug: 5827809
Change-Id: I5e8cd7dcf48c1d6831a970a67f63f24916c5e437
|
| 9ec0f03a0d0b17bbb94ac0b9fef6add28a133c3a |
|
28-Feb-2012 |
Nick Kralevich <nnk@google.com> |
Add relro support
Add support for PT_GNU_RELRO. This allows the static linker to
indicate that certain regions of memory should be marked as
"read-only" after dynamic linking is complete.
See:
* http://www.akkadia.org/drepper/nonselsec.pdf (section 6)
* http://tk-blog.blogspot.com/2009/02/relro-not-so-well-known-memory.html
Note that this change has no effect on Android right now, because
we don't compile our code with relro enabled.
Change-Id: I6541f8775367e8558b4388f7d105b1ae6e8f046b
|
| 70b1668a76d3b719ae690903ea790fda964a5458 |
|
30-Jan-2012 |
David 'Digit' Turner <digit@google.com> |
remove obsolete SuperH support
We don't have a toolchain anymore, we don't have working original
kernel headers, and nobody is maintaining this so there is really
no point in keeping this here. Details of the patch:
- removed code paths from Android.mk files related to the SuperH
architecture ("sh")
- removed libc/arch-sh, linker/arch-sh, libc/kernel/arch-sh
- simplified libc/SYSCALLS.TXT
- simplified the scripts in libc/tools/ and libc/kernel/tools
Change-Id: I26b0e1422bdc347489e4573e2fbec0e402f75560
Signed-off-by: David 'Digit' Turner <digit@android.com>
|
| 468319ce4f3f7383d788b76c09cda2a405311f36 |
|
12-Nov-2011 |
Nick Kralevich <nnk@google.com> |
Make the linker relocatable.
Previously, the linker always loaded itself into the same
location in memory, which inhibited the effectiveness of Android's
ASLR implementation. Modify the linker code so it can be relocatable
and link itself at runtime.
Change-Id: Ia80273d7a00ff648b4da545f4b69debee6343968
|
| 7939908c8310342c8e1b717c4599273a782b3c2b |
|
04-Nov-2011 |
Nick Kralevich <nnk@google.com> |
linker: set LOCAL_NO_CRT := true
Use LOCAL_NO_CRT to prevent linking against crtbegin.o, rather than
messing with build rules. This also prevents linking against crtend.o,
which isn't needed for the linker.
Change-Id: I0c5b9999be7e8676560fe145c1c033ffce8db4d1
|
| 8e8a7b1f0fb9daf8d4434e18a9fff5c28f849cb8 |
|
03-Nov-2011 |
Nick Kralevich <nnk@google.com> |
Revert "Make the linker relocatable."
This reverts commit 994e9a5ed1c4e9f23a8bed79caea684eaa270027.
Broke x86 build.
|
| 994e9a5ed1c4e9f23a8bed79caea684eaa270027 |
|
01-Nov-2011 |
Nick Kralevich <nnk@google.com> |
Make the linker relocatable.
Previously, the linker always loaded itself into the same
location in memory, which inhibited the effectiveness of Android's
ASLR implementation. Modify the linker code so it can be relocatable
and link itself at runtime.
Change-Id: I90d064743abdd29450ac0482ed28752b2196286c
|
| 48527c3f740a80b45acb5a6efc217f771ae50143 |
|
17-Jul-2011 |
Shih-wei Liao <sliao@google.com> |
Revert "Revert "linker: get rid of the buddy allocator""
This reverts commit f9a9cda23a6afc1c2dfdfd624cde23b61941eb5e.
This revert is promised once b/5039224, b/5036755, b/5036610 are resolved.
|
| f9a9cda23a6afc1c2dfdfd624cde23b61941eb5e |
|
16-Jul-2011 |
Nick Kralevich <nnk@google.com> |
Revert "linker: get rid of the buddy allocator"
This reverts commit 7059b1f02ea9197728c851edd9ae0dd7688fa700.
Bug: 5036610
|
| 7059b1f02ea9197728c851edd9ae0dd7688fa700 |
|
14-Jul-2011 |
Nick Kralevich <nnk@google.com> |
linker: get rid of the buddy allocator
Currently, the Android linker is placing shared libraries into
a well-known spot in memory. This is interfering with the kernel's
ASLR support.
This change stops forcing non-prelinked libraries into a particular
address space.
Also, get rid of FLAG_PRELINKED. As best I can tell, this flag
is never used.
Change-Id: I527af12fb54f821c2b5ca7693dbf63d022f8f4ae
|
| a0aec0bd3083280dcba0c3aaba39602425228e2a |
|
04-May-2011 |
Bruce Beare <bruce.j.beare@intel.com> |
x86: Enable -fstack-protector
Change-Id: Iff9e3a3ba0e2d0faa7c6d98154aa5be0cc8a6c50
Orig-Change-Id: Ib69514c3afcb4c1f5e5f3f8cd91acfd145a0866c
Signed-off-by: Bruce Beare <bruce.j.beare@intel.com>
|
| a903811819c06e4d6e9e27fcc9db3ab5459009bc |
|
07-Jun-2011 |
Martijn Coenen <maco@google.com> |
Revert "x86: Enable -fstack-protector"
This reverts commit e0b4844a20ffd022a568abb4203b3f7c759c7ff5,
causes netd to crash.
|
| e0b4844a20ffd022a568abb4203b3f7c759c7ff5 |
|
04-May-2011 |
Bruce Beare <bruce.j.beare@intel.com> |
x86: Enable -fstack-protector
Change-Id: Ib69514c3afcb4c1f5e5f3f8cd91acfd145a0866c
Signed-off-by: Bruce Beare <bruce.j.beare@intel.com>
|
| 368070454b1349d1fcf29a5d1eb51c869fb538f6 |
|
14-Mar-2011 |
Iliyan Malchev <malchev@google.com> |
bionic: remove LOCAL_PRELINK_MODULE
Change-Id: Iad65ae18446b20d2aace7b8fe19b1a032b616e9c
Signed-off-by: Iliyan Malchev <malchev@google.com>
|
| be5755969d70668bbab0e0c0ed75ebd867189723 |
|
16-Dec-2010 |
David 'Digit' Turner <digit@google.com> |
linker: Remove unsecure env. variable for setuid programs.
This removes several unsecure environment variables from the
environment block when the program being loaded is setuid. The
list of env. variables is the same than what GLibc uses at this
point.
Change-Id: I456d3ea0880fe0d4de0d3c5dd51871dd36e87fd6
|
| 8bff9a31aa13ff83ccaedd54ebda96770e6cf910 |
|
11-Jun-2010 |
David 'Digit' Turner <digit@google.com> |
linker: remove libcutils dependency by re-implementing simpler socket_local_client.
Change-Id: I87f29fd59454d713b9ddfb13e6cf114822f52efd
|
| 5c734644eebf8d01be1e86cbe20a111a5c5a2738 |
|
20-Jan-2010 |
David 'Digit' Turner <digit@google.com> |
Fix debug output in the dynamic linker.
This provides a mini-printf implementation that reduces the
size of the dynamic linker by 25 KB, by preventing the drag of
formatting-related routines from the C library.
Also allow traces to be sent to the log, instead of stdout.
NOTE: You now need to modify Android.mk to enable/disable debug
output.
|
| 90f82e5868de5a30d4842951b80be0c8a9cedc6d |
|
25-Jan-2010 |
Doug Kwan <dougkwan@google.com> |
Fix typo in a comment.
|
| 1a2917ca954f575cc9698c99e54bd93087793c8f |
|
25-Jan-2010 |
Doug Kwan <dougkwan@google.com> |
Align TEXT section to 4K boundary so that we can use both ld and gold.
|
| 278d157f437c0357b7c6d1fb1cbffbc0a72bb788 |
|
30-Sep-2009 |
Gary King <gking@nvidia.com> |
Use correct TLS codepath for linker
Replicate ARM libc build's HAVE_ARM_TLS_REGISTER preprocessor definition
logic, to ensure that the runtime linker uses the correct codepath for
accessing the TLS address
|
| ad13c57298e57d33c130fb03a2c6494da573408c |
|
06-Nov-2009 |
Shin-ichiro KAWASAKI <shinichiro.kawasaki.mg@hitachi.com> |
added and modified linker to support SuperH architecture
|
| 2e85579c34047c305caf15fb0ebe02bf3d001d0e |
|
21-May-2009 |
Dima Zavin <dima@android.com> |
linker: Make the errors reported by dlopen/dlsym be more useful.
Changed it so that when the linker generates error messages, they are
scribbled away into a buffer that dlfcn and friends can read from.
Since the error messages are generetad with snprintf, and snprintf
MAY call malloc during some code paths, we now link against a version
of libc that does not contain malloc/free/realloc/calloc. We then define
malloc and friends in the dynamic loader, and make them abort() if they
are ever called.
Signed-off-by: Dima Zavin <dima@android.com>
|
| 1dc9e472e19acfe6dc7f41e429236e7eef7ceda1 |
|
04-Mar-2009 |
The Android Open Source Project <initial-contribution@android.com> |
auto import from //depot/cupcake/@135843
|
| 1767f908af327fa388b1c66883760ad851267013 |
|
04-Mar-2009 |
The Android Open Source Project <initial-contribution@android.com> |
auto import from //depot/cupcake/@135843
|
| a799b53f10e5a6fd51fef4436cfb7ec99836a516 |
|
03-Mar-2009 |
The Android Open Source Project <initial-contribution@android.com> |
auto import from //depot/cupcake/@132589
|
| fe5745033a4f397c62a4e00efd9257ac9f83755c |
|
03-Mar-2009 |
The Android Open Source Project <initial-contribution@android.com> |
auto import from //depot/cupcake/@137055
|
| e5cc1f386b167b9f7bfdebc7219e89aa9b71e4b2 |
|
16-Jan-2009 |
The Android Open Source Project <initial-contribution@android.com> |
auto import from //branches/cupcake/...@126645
|
| a27d2baa0c1a2ec70f47ea9199b1dd6762c8a349 |
|
21-Oct-2008 |
The Android Open Source Project <initial-contribution@android.com> |
Initial Contribution
|