Commit Graph

193 Commits

Author SHA1 Message Date
Elliott Hughes
26f2e4a163 Merge "ARM: make CRT_LEGACY_WORKAROUND work as intended" 2012-09-05 09:43:35 -07:00
Irina Tirdea
1ad10a566e Add getsid system call to bionic
Add getsid() system call to bionic for
all architectures. This is needed for various tools
(e.g. perf).

Adding the getsid system call was done in 3 steps:
() add getsid system call (function name and syscall
number) to libc/SYSCALLS.TXT
() generate all necessary headers by calling
libc/tools/gensyscalls.py. This patch is adding
the generated files since the build system
does not call gensyscalls.py.
() add the system call signature to libc/include/unistd.h

Change-Id: Id69a257e13ec02e1a44085a6b217a3f19ab025b1
Signed-off-by: Irina Tirdea <irina.tirdea@intel.com>
2012-09-03 01:38:34 +03:00
Nick Kralevich
069c64cdf2 Merge "ARM: make sure __on_dlclose() actually gets called" 2012-08-28 13:04:22 -07:00
Nick Kralevich
e026b1d89a Merge "ARM: remove dummy entries from .so init_array/fini_array" 2012-08-28 12:49:46 -07:00
Ard Biesheuvel
144c291866 ARM: warn about atexit() calls from legacy shared libraries
Legacy ARM shared libraries use this generic version of atexit(),
which queues exit functions for invocation at program exit, at
which time the library may have been dlclose()'d, causing the
program to crash.

Change-Id: I41ae153c23268daa65ede7fb8966fc3e9caec369
Signed-off-by: Ard Biesheuvel <ard.biesheuvel@gmail.com>
2012-08-28 11:23:06 +02:00
Ard Biesheuvel
f3cfcd869d ARM: make CRT_LEGACY_WORKAROUND work as intended
To properly support legacy ARM shared libraries, libc.so needs
to export the symbols __dso_handle and atexit, even though
these are now supplied by the crt startup code.

This patch reshuffles the existing CRT_LEGACY_WORKAROUND
conditionally compiled code slightly so it works as the
original author likely intended.

Change-Id: Id6c0e94dc65b7928324a5f0bad7eba6eb2f464b9
Signed-off-by: Ard Biesheuvel <ard.biesheuvel@gmail.com>
2012-08-28 10:27:02 +02:00
Ard Biesheuvel
c23092887f ARM: remove dummy entries from .so init_array/fini_array
The runtime linker parses the ELF section headers to
discover the size of the init_array and fini_array, so
there is no point in putting NULL terminators at the end.

Change-Id: I3246cd585efce9314155600277dd829e9f37d04f
Signed-off-by: Ard Biesheuvel <ard.biesheuvel@gmail.com>
2012-08-28 09:55:51 +02:00
Ard Biesheuvel
0a150ead18 libc: remove ctors/dtors sections
None of the supported ARCHs actually populate these sections,
so there is no point in keeping them in the binaries.

Change-Id: I21a364f510118ac1114e1b49c53ec8c895c6bc6b
Signed-off-by: Ard Biesheuvel <ard.biesheuvel@gmail.com>
2012-08-22 20:45:26 +02:00
Ard Biesheuvel
404e28ff8c hardening: remove pointless ARM __get_pc() function
Useful if you're trying to defeat ASLR, otherwise not
so much ...

Change-Id: I17ebb50bb490a3967db9c3038f049adafe2b8ea7
Signed-off-by: Ard Biesheuvel <ard.biesheuvel@gmail.com>
2012-08-22 20:38:54 +02:00
Ard Biesheuvel
5ed48a4d7f ARM: make sure __on_dlclose() actually gets called
Change-Id: I280e5428b0543cccf17ca36baee4865395928cdb
Signed-off-by: Ard Biesheuvel <ard.biesheuvel@gmail.com>
2012-08-21 12:56:05 +02:00
Pavel Chupin
b7beb69075 Add link.h for all platforms with dl_phdr_info
This header is used on bionic build and should be propagated into
sysroot on toolchain rebuild. Discussion re. this header is here:
http://gcc.gnu.org/ml/gcc-patches/2012-08/msg00936.html

It is available already in mips NDK platforms:
development/ndk/platforms/android-9/arch-mips/include/link.h

Change-Id: I39ff467cdac9f448e31c11ee3e14a6200e82ab57
Signed-off-by: Pavel Chupin <pavel.v.chupin@intel.com>
2012-08-17 12:44:23 -07:00
Nick Kralevich
6eee1fc68f crtend*: Add GNU_STACK note
Add a GNU_STACK marker to crtend* files. This tells the linker
that these files do not require an executable stack.

When linking, a missing GNU_STACK marker in any .o file can prevent
the compiler from automatically marking the final executable as NX
safe (executable stack not required).  In Android, we normally work
around this by adding -Wa,--noexecstack / -Wl,-z,noexecstack.
For files like crtend.S / crtend_so.S, which are included in every
executable / shared library, it's better to add the GNU_STACK note
directly to the assembly file.  This allows the compiler to
automatically mark the final executable as NX safe without any
special command line options.

References: http://www.gentoo.org/proj/en/hardened/gnu-stack.xml

Change-Id: I07bd058f9f60ddd8b146e0fb36ba26ff84c0357d
2012-08-10 14:12:00 -07:00
Jeff Sharkey
e36c826f7a Add unshare() syscall.
(cherry-pick of 5467f25f82934d611c60f8bc57a05114f3c1bea0.)

Bug: 6925012
Change-Id: Ic5ea2fbd606311087de05d7a3594df2fa9b2fef9
2012-08-10 12:57:43 -07:00
Peter Enderborg
3460db9490 bionic: Stack pointer/signal race condition.
Move the stackpointer so a captured signal does not corrupt
stack variables needed for __thread_entry.

Change-Id: I3e1e7b94a6d7cd3a07081f849043262743aa8064
2012-07-27 15:11:01 +02:00
Nick Kralevich
9d40326830 arm: rewrite crtbegin* as C files.
Rewrite
 crtbegin.S     -> crtbegin.c
 crtbegin_so.S  -> crtbegin_so.c

This change allows us to generate PIC code without relying
on text relocations.

As a consequence of this rewrite, also rewrite
  __dso_handle.S    -> __dso_handle.c
  __dso_handle_so.S -> __dso_handle_so.c
  atexit.S          -> atexit.c

In crtbegin.c _start, place the __PREINIT_ARRAY__, __INIT_ARRAY__,
__FINI_ARRAY__, and __CTOR_LIST__ variables onto the stack, instead of
passing a pointer to the text section of the binary.

This change appears sorta wonky, as I attempted to preserve,
as much as possible, the structure of the original assembly.
As a result, you have C files including other C files, and other
programming uglyness.

Result: This change reduces the number of files with text-relocations
from 315 to 19 on my Android build.

Before:
  $ scanelf -aR $OUT/system | grep TEXTREL | wc -l
  315

After:
  $ scanelf -aR $OUT/system | grep TEXTREL | wc -l
  19

Change-Id: Ib9f98107c0eeabcb606e1ddc7ed7fc4eba01c9c4
2012-06-01 14:41:27 -07:00
Nick Kralevich
83a73d1afe crtbegin: eliminate duplicate code
crtbegin_dynamic and crtbegin_static are essentially identical,
minus a few trivial differences (comments and whitespace).

Eliminate duplicates.

Change-Id: Ic9fae6bc9695004974493b53bfc07cd3bb904480
2012-05-30 11:45:12 -07:00
Henrik Smiding
3ebd31c0a1 Add optimized version of memcmp for Cortex A9
Adds new code to function memcmp, optimized for Cortex A9.

Copyright (C) ST-Ericsson SA 2010

Added neon optimization

Change-Id: I8864d277042db40778b33232feddd90a02a27fb0
Author: Henrik Smiding henrik.smiding@stericsson.com for ST-Ericsson.
Signed-off-by: Christian Bejram <christian.bejram@stericsson.com>
2012-05-19 14:04:59 +02:00
Nick Kralevich
6cdefd06c0 Add linker support for PIE
Modify the dynamic linker so that executables can be loaded
at locations other than 0x00000000.

Modify crtbegin* so that non-PIC compilant "thumb interwork
veneers" are not created by the linker.

Bug: 5323301
Change-Id: Iece0272e2b708c79034f302c20160e1fe9029588
2012-05-15 09:56:32 -07:00
Iliyan Malchev
8034415ddd resolved conflicts for merge of 08e72d01 to jb-dev-plus-aosp
Change-Id: If00e354a5953ed54b31963d4f8ea77e1603c321e
2012-05-10 09:19:59 -07:00
Prajakta Gudadhe
08e72d0161 bionic: add support for non-NEON memcpy() on NEON SoCs
Some SoCs that support NEON nevertheless perform better with a non-NEON than a
NEON memcpy().  This patch adds build variable ARCH_ARM_USE_NON_NEON_MEMCPY,
which can be set in BoardConfig.mk.  When ARCH_ARM_USE_NON_NEON_MEMCPY is
defined, we compile in the non-NEON optimized memcpy() even if the SoC supports
NEON.

Change-Id: Ia0e5bee6bad5880ffc5ff8f34a1382d567546cf9
2012-05-09 13:34:31 -07:00
Ben Cheng
da0d8534f1 am 08b51e2c: Implement the "abort" stub in assembly for ARM.
* commit '08b51e2c091d036c124259ae59eb7be6bbe346af':
  Implement the "abort" stub in assembly for ARM.
2012-05-09 01:48:40 -07:00
Ben Cheng
eda7be454d Implement the "abort" stub in assembly for ARM.
So that we can always get the full stack trace regardless of gcc's handling
of the "noreturn" attribute associated with abort().

(Cherry pick of Id264a5167e7cabbf11515fbc48f5469c527e34d4.)

Bug: 6455193

Conflicts:

	libc/Android.mk

Change-Id: I568fc5303fd1d747075ca933355f914122f94dac
2012-05-08 14:47:20 -07:00
Ben Cheng
08b51e2c09 Implement the "abort" stub in assembly for ARM.
So that we can always get the full stack trace regardless of gcc's handling
of the "noreturn" attribute associated with abort().

[cherry-picked from master]

BUG:6455193
Change-Id: I0102355f5bf20e636d3feab9d1424495f38e39e2
2012-05-08 14:39:35 -07:00
Elliott Hughes
e636e1f2c1 am 8657eafc: Merge "Adjust memcpy for ARM Cortex A9 cache line size"
* commit '8657eafc3552f36c176667c1591beab255308da6':
  Adjust memcpy for ARM Cortex A9 cache line size
2012-05-07 13:59:58 -07:00
Henrik Smiding
fe6338da91 Adjust memcpy for ARM Cortex A9 cache line size
ARM Cortex A8 use 64 bytes and ARM Cortex A9 use 32 bytes cache line
size.

The following patch:
  Adds code to adjust memcpy cache line size to match A9 cache line
  size.
  Adds a flag to select between 32 bytes and 64 bytes cache line
  size.

  Copyright (C) ST-Ericsson SA 2010
    Modified neon implementation to fit Cortex A9 cache line size
    Author: Henrik Smiding henrik.smiding@stericsson.com for
            ST-Ericsson.

Change-Id: I8a55946bfb074e6ec0a14805ed65f73fcd0984a3
Signed-off-by: Christian Bejram <christian.bejram@stericsson.com>
2012-05-07 14:18:02 +02:00
Evgeniy Stepanov
4a9d6e50bb Fix segv when unwinding stack past __libc_init.
This change mirrors cd15bac for statically-linked binaries.

Change-Id: Id870832a50b37f0ef3e79e1ed03ed31390bfc9ef
2012-04-18 12:59:38 +04:00
Kenny Root
f0ec06ba60 Add faccessat to syscall list
Change-Id: I427a18811089cb280769ac8da3ed8adc00a65a10
2012-04-13 15:45:42 -07:00
Elliott Hughes
d5099016f7 Merge "Fix segv when unwinding stack past __libc_init." 2012-04-12 11:52:44 -07:00
Kenny Root
470835b215 Move end of __on_dlclose up
The END macro was put too far down which made the linker complain about
it. Move up to the end of the code.

Change-Id: Ica71a9c6083b437d2213c7cefe34b0083c78f16b
2012-04-11 14:24:28 -07:00
Kenny Root
03273f8fc0 __on_dlclose should be aligned
Marking segments read-only was pushing the alignment of __on_dlclose by
2 bytes making it unaligned. This change makes sure the ARM code is
aligned to the 4 byte boundary.

Bug: 6313309
Change-Id: Ic2bf475e120dd61225ec19e5d8a9a8b1d0b7f081
2012-04-10 17:53:11 -07:00
Evgeniy Stepanov
cd15bacf33 Fix segv when unwinding stack past __libc_init.
This change fixes a segmentation fault in the libc unwinder when it goes
past __libc_init.

Unwind instructions for __libc_init direct it to grab the return address from
the stack frame. Without this change, the unwinder gets a wild address and
looks up further unwind instructions for the routine at that address. If it's
unlucky enough to hit an existing function, it will try to unwind it. Bad
things happen then.

With this change, the return address always points to the _start function,
which does not have unwind instructions associated with it. This stop the
unwind process.

__libc_init never returns, so this does not affect program execution, other
than adding 4 bytes on the main thread stack.

Change-Id: Id58612172e8825c8729cccd081541a13bff96bd0
2012-04-10 16:45:54 +04:00
Ben Cheng
1a823691a2 Update kernel headers and add syscall "perf_event_open"
Change-Id: I43f12b727881df002a8524f2738586c043833bae
2012-03-13 12:28:40 -07:00
Kenny Root
be101bf39a Revert "Reference __dso_handle in PIC way"
This reverts commit 93cb308137
2012-03-05 10:45:31 -08:00
Kenny Root
93cb308137 Reference __dso_handle in PIC way
Use the same pattern in atexit.S to reference __dso_handle in a way that
doesn't require a TEXTREL flag to be set.

Change-Id: Id69d20863ee203d2b2f7ef0db230f9b548657741
2012-03-02 13:09:36 -08:00
Andrew Hsieh
4fc1273459 Merge "Trivial fix in comment" 2012-02-29 09:40:49 -08:00
Dima Zavin
f1a17e762b libc: Add __aeabi_llsl and __aeabi_llsr to libgcc_compat
Some platform libraries built for ICS do not work with master
because of some refactoring in frameworks/base.

Make sure that these libgcc symbols are always present in our libc

Change-Id: Ib8d345878be0ba711f051082a778f5cc1f1b3a19
Signed-off-by: Dima Zavin <dima@android.com>
2012-02-22 15:18:56 -08:00
Andrew Hsieh
58b2c1616b Trivial fix in comment
Very, very trivial fix for minor typo in comment about how it works

Change-Id: Ia08d332366837dec8f7e91b9728732c5edea223e
2012-02-21 15:09:32 -08:00
Jean-Baptiste Queru
d6b58b03b8 am 09049311: am cfff36df: am a60ff6c5: Merge "libc: Define new symbol visibility macros"
* commit '09049311a229c427f73e3e0ac873bf344b45aaf2':
  libc: Define new symbol visibility macros
2012-02-13 14:42:48 -08:00
Jean-Baptiste Queru
cfff36df2b am a60ff6c5: Merge "libc: Define new symbol visibility macros"
* commit 'a60ff6c5b2ca76181b387d8c10aee22a2cbcf840':
  libc: Define new symbol visibility macros
2012-02-13 14:25:53 -08:00
David 'Digit' Turner
5fbf2e0992 libc: Define new symbol visibility macros
This patch defines a few new macros that can be used to control the
visibility of symbols exported by the C library:

- ENTRY_PRIVATE() can be used in assembly sources to indicate
  that an assembler function should have "hidden" visibility, i.e.
  will never be exported by the C library's shared library.

  This is the equivalent of using __LIBC_HIDDEN__ for a C function,
  but ENTRY_PRIVATE() works like ENTRY(), and must be used with
  END() to tag the end of the function.

- __LIBC_ABI_PUBLIC__ can be used to tag a C functions as being
  part of the C library's public ABI. This is important for a
  few functions that must be exposed by the NDK to maintain
  binary compatibility.

  Once a symbol has been tagged with this macro, it shall
  *never* be removed from the library, even if it becomes
  directly unused due to implementation changes
  (e.g. __is_threaded).

- __LIBC_ABI_PRIVATE__ can be used for C functions that should
  always be exported by the C library because they are used by
  other libraries in the platform, but should not be exposed
  by the NDK. It is possible to remove such symbols from the
  implementation if all callers are also modified.

+ Add missing END() assembly macro for x86

Change-Id: Ia96236ea0dbec41d57bea634b39d246b30e5e234
2012-01-31 22:19:09 +01:00
Jean-Baptiste Queru
73fa5fdaf9 Merge 2f80f07d
Change-Id: Iff51b8530dbee01499ba4af0ecd6ab837c8c94fb
2012-01-20 16:47:01 -08:00
Jean-Baptiste Queru
2f80f07d81 am 23f56bbb: Merge "Add extended attribute (xattr) system call wrappers to bionic."
* commit '23f56bbb6ae053996dd821f29379aea0c7166055':
  Add extended attribute (xattr) system call wrappers to bionic.
2012-01-20 11:54:47 -08:00
Stephen Smalley
5eb686d105 Add extended attribute (xattr) system call wrappers to bionic.
The xattr system calls are required for the SE Android userspace in
order to get and set file security contexts.  In particular, libselinux
requires these calls.

Change-Id: I78f5eb3d8f3384aed0a5e7c6a6f001781d982017
2012-01-18 08:02:23 -05:00
Nick Kralevich
023e5409df am 06f51ba1: am f44de270: add personality() system call.
* commit '06f51ba1af2fafeec7fdfcba5d635bd001a31b3e':
  add personality() system call.
2012-01-17 13:09:53 -08:00
Nick Kralevich
06f51ba1af am f44de270: add personality() system call.
* commit 'f44de270bba32c9b1b5eff8a34be07b10ddff238':
  add personality() system call.
2012-01-17 11:45:25 -08:00
Nick Kralevich
f44de270bb add personality() system call.
Change-Id: Ie899def8ea1d705930ed83adae1343c1353e7c57
2012-01-13 15:50:40 -08:00
Bruce Beare
6519c8124e am e30e9093: sreadahead: adding readahead system call into bionic libc
* commit 'e30e909363c5c706f394050d9cd00ce222caadbf':
  sreadahead: adding readahead system call into bionic libc
2012-01-03 18:37:28 -08:00
Bruce Beare
e30e909363 sreadahead: adding readahead system call into bionic libc
Add bionic libc to support readahead system call.
This is needed to enable sreadahead to work.

Change-Id: I3856e1a3833db82e6cf42fd34af7631bd40cc723
Author: Winson Yung <winson.w.yung@intel.com>
Signed-off-by: Bruce Beare <bruce.j.beare@intel.com>
2012-01-03 15:18:04 -08:00
David 'Digit' Turner
f1a39dce60 libc: Fix typo that broke NDK compatibility.
The function must be named __atomic_cmpxchg, not __android_cmpxchg.
This typo broke existing prebuilt binaries (they couldn't be loaded
at runtime anymore).

Change-Id: I25ca7d18329817f0056e616a0409113269ad7b1f
2011-11-23 14:38:36 +01:00
David 'Digit' Turner
de44d0b2bd Merge "libc: provide atomic operations will full barriers for NDK apps." 2011-11-22 02:10:06 -08:00
Jeff Brown
10c8ce59a4 Add tgkill syscall.
Use tgkill instead of tkill to implement pthread_kill.
This is safer in the event that the thread has already terminated
and its id has been reused by a different process.

Change-Id: Ied715e11d7eadeceead79f33db5e2b5722954ac9
2011-11-18 16:40:48 -08:00
David 'Digit' Turner
0fec6b9d88 libc: provide atomic operations will full barriers for NDK apps.
__atomic_cmpxchg and other related atomic operations did not
provide memory barriers, which can be a problem for non-platform
code that links against them when it runs on multi-core devices.

This patch does two things to fix this:

- It modifies the existing implementation of the functions
  that are exported by the C library to always provide
  full memory barriers. We need to keep them exported by
  the C library to prevent breaking existing application
  machine code.

- It also modifies <sys/atomics.h> to only export
  always-inlined versions of the functions, to ensure that
  any application code compiled against the new header will
  not rely on the platform version of the functions.

  This ensure that said machine code will run properly on
  all multi-core devices.

This is based on the GCC built-in sync primitives.

The end result should be only slightly slower than the
previous implementation.

Note that the platform code does not use these functions
at all. A previous patch completely removed their usage in
the pthread and libstdc++ code.

+ rename arch-arm/bionic/atomics_arm.S to futex_arm.S
+ rename arch-x86/bionic/atomics_x86.S to futex_x86.S
+ remove arch-x86/include/sys/atomics.h which already
  provided inlined functions to the x86 platform.

Change-Id: I752a594475090cf37fa926bb38209c2175dda539
2011-11-16 17:37:15 +01:00
Nick Kralevich
d9ad62343c Add linker support for PIE
Modify the dynamic linker so that executables can be loaded
at locations other than 0x00000000.

Modify crtbegin* so that non-PIC compilant "thumb interwork
veneers" are not created by the linker.

Bug: 5323301
Change-Id: Iece0272e2b708c79034f302c20160e1fe9029588
2011-10-22 13:19:23 -07:00
Evgeniy Stepanov
487b613e57 Use ENTRY and EXIT macros for strcmp, memcpy, atexit.
Without this change strcmp size is zero (not set), and it gets
ignored by Valgrind. Changes to memcpy and atexit don't affect the
generated binary in any way.

Change-Id: I05818cb5951f75901dc8c0eef02807a2e83a9231
2011-10-11 12:12:05 +04:00
David 'Digit' Turner
58246b7067 libc: Add __aeabi_f2uiz to libgcc_compat.c
This patch ensure that __aeabi_f2uiz is embedded in our C library.
This is needed to avoid breaking certain applications when they are
loaded in ICS. It is likely that the issue is due to mis-linked
binaries generated with the stand-alone toolchain (the problem
should not exist if you use ndk-build), but this fix is easier
than asking all app developers to fix their custom build system.

If you want more technical details, read the comments inside
libgcc_compat.c

Change-Id: I59ac1fc781ecb70b90b5573c5a3c67560ca8f270
2011-08-22 19:53:10 +02:00
David Turner
b489666086 am 1c0a0381: Merge "Enable functional DSO object destruction"
* commit '1c0a0381dfb3648ffadef9537ec9383d63d62473':
  Enable functional DSO object destruction
2011-06-23 05:28:13 -07:00
Bruce Beare
3964084282 Enable functional DSO object destruction
Unfortunately, legacy .so files for ARM don't have a correct crtbegin file.
Consequently, we have to grandfather the old __dso_handle behaviour.
Add some ifdefs for ARM to allow it to use the old code until we can work
out a transition.

Change-Id: I6a28f368267d792c94e1d985d8344023bc632f6f
Author: H.J. Lu <hongjiu.lu@intel.com>
Signed-off-by: Bruce Beare <bruce.j.beare@intel.com>
2011-06-20 14:44:44 -07:00
David Turner
a9e409a035 am a7a9dddb: Merge "bionic: Add ARM optimized strcmp()"
* commit 'a7a9dddb5dfe783d65fec4d3b0dee9f734345a29':
  bionic: Add ARM optimized strcmp()
2011-05-17 04:47:09 -07:00
Jim Huang
f50e9be593 bionic: Add ARM optimized strcmp()
Reference results of the experiments on TI OMAP3430 at 600 MHz

$ bench_strcmp -N "strcmp_1k" -s 1k -I 200

[original C code]
             prc thr   usecs/call      samples   errors cnt/samp     size
strcmp_1k      1   1     10.38000          102        0    15000     1024

[ARM optimized code]
             prc thr   usecs/call      samples   errors cnt/samp     size
strcmp_1k      1   1      3.08840           88        0    15000     1024

The work was derived from ARM Ltd, contributed to newlib, and reworked
for Android by Linaro.

Change-Id: Ib0d5755e1eb9adb07d80ef0252f57a5c4c57a425
Signed-off-by: Jim Huang <jserv@0xlab.org>
2011-04-20 15:39:43 +08:00
Ken Sumrall
ae2d5ba314 Add support for the utimensat(2) syscall to bionic.
The kernel has supported this syscall for quite some time now,
but bionic did not.  Now that there is a need for it, let's
add it to bionic.

Change-Id: Ifcef3e46f1438d79435b600c4e6063857ab16903
2011-03-24 18:18:48 -07:00
David Turner
3224c08bd7 Merge changes I8c481c89,I791406f8,I5f09cef8
* changes:
  libc: ARM: update syscalls with new script
  libc: ARM: add size info to gensyscalls
  Add function marks and size indications
2011-02-18 15:22:27 -08:00
Kenny Root
fb723c8749 libc: ARM: update syscalls with new script
Used the new gensyscalls.py script to update the ARM syscalls with the
BEGIN(x) and END(x) macros to give size information for the code of the
syscall. Useful for valgrind.

Change-Id: I8c481c8928401ac110fd19b087f7d67e4db39326
2011-02-17 10:47:47 -08:00
Kenny Root
420878c690 Add function marks and size indications
Add a macro to annotate function end and start using both ENTRY and END
for each function. This allows valgrind (and presumably other debugging
tools) to use the debug symbols to trace the functions.

Change-Id: I5f09cef8e22fb356eb6f5cee952b031e567599b6
2011-02-17 09:07:25 -08:00
Kenny Root
0233509c16 Amend previous commit with needed include
Change-Id: Idae8daaf095d90513820e05f423144ffed4ba913
2011-02-17 07:50:36 -08:00
Kenny Root
3a3c1853ac Use CLZ on ARMv5 and newer
Change-Id: Ia5aa6974c0343ae43fbcb91304501213048e9ec0
2011-02-16 16:40:08 -08:00
David 'Digit' Turner
95d751feac libc: Add ftruncate64 and improve 64-bit parameter syscall handling.
This patch improves the handling of 64-bit parameters in syscalls on ARM.
The ARM EABI mandates that 64-bit quantities be passed in even/odd register
pairs, which requires special treatment.

This allows us to simplify our implementations of pread() and pwrite()
and remove the C stubs for pread64() and pwrite64().

Also add ftruncate64() to <unistd.h>

Change-Id: I407e2fd223ba0093dd2d0b04c6152fadfc9ce3ef

Bug 3107933
2010-12-16 17:04:41 +01:00
David 'Digit' Turner
72e6fd4242 <sched.h>: Add sched_getcpu() and cpu_set_t
This adds the cpu_set_t type definition and related functions
and macros used to handle CPU thread affinity.

  sched_getcpu()
  sched_setaffinity()
  sched_getaffinity()

Change-Id: If382ecafde8926341a88478062b275553645065b
2010-12-06 13:42:54 +01:00
Jean-Baptiste Queru
9c8ea7fa3f am 24dc9363: resolved conflicts for merge of 1bc98ccb to gingerbread-plus-aosp
* commit '24dc936346b4a31005ac28c4bd464320cca9320a':
  bionic: Add ARM optimized strcpy()
2010-11-22 13:38:44 -08:00
Jean-Baptiste Queru
24dc936346 resolved conflicts for merge of 1bc98ccb to gingerbread-plus-aosp
Change-Id: Ief9ec3d0472660e26864e082e03c26e09a043b9d
2010-11-22 13:34:59 -08:00
Jim Huang
73c04b3269 bionic: Add ARM optimized strcpy()
Reference results of the experiments on Qualcomm MSM7x25 (524MHz):

[original C code]
             prc thr   usecs/call      samples   errors cnt/samp
size
strcpy_1k      1   1     14.56159           99        0     1000
1024

[ARM optimized code]
             prc thr   usecs/call      samples   errors cnt/samp
size
strcpy_1k      1   1      3.46653           99        0     1000
1024

The work was derived from ARM Ltd.

Change-Id: I906ac53bb7a7285e14693c77d3ce8d4ed6f98bfd
2010-11-22 13:01:32 -08:00
Jean-Baptiste Queru
482358fda7 am d29b8a51: am 5109146f: Merge "Reconcile assembly-only macros in <machine/cpu-features.h>"
Merge commit 'd29b8a51a5f95a3f38e5fb812231e12e5a66a865'

* commit 'd29b8a51a5f95a3f38e5fb812231e12e5a66a865':
  Reconcile assembly-only macros in <machine/cpu-features.h>
2010-10-21 09:54:30 -07:00
Jean-Baptiste Queru
d29b8a51a5 am 5109146f: Merge "Reconcile assembly-only macros in <machine/cpu-features.h>"
Merge commit '5109146f954d8cca39d34689bff2762e15bc6933' into gingerbread-plus-aosp

* commit '5109146f954d8cca39d34689bff2762e15bc6933':
  Reconcile assembly-only macros in <machine/cpu-features.h>
2010-10-19 15:21:57 -07:00
Ying Wang
76a34d6628 Remove duplicate item
This elimates the makefile warning at the beginning of each build:
libc_common_intermediates/arch-arm/syscalls/eventfd.o' given more than once in the same rule.

Change-Id: I25cc0c373d55b5036dd17811a595c097fd6ca69a
2010-10-08 17:09:55 -07:00
Jim Huang
94e5c5ef37 Reconcile assembly-only macros in <machine/cpu-features.h>
The change explicitly isolates the assembly-only macros in header
<machine/cpu-features.h> in order to prevent mis-inclusion in C/C++
source files.

Change-Id: I0258e87c5ac3fd24944fb227290ac3b9cac4bfba
2010-10-01 17:00:46 +08:00
repo sync
686af0b3a5 resolved conflicts for merge of defd1622 to gingerbread-plus-aosp
Conflicts:
	libc/arch-arm/syscalls/eventfd.S
	libc/include/sys/eventfd.h
	libc/include/sys/linux-syscalls.h

Change-Id: I02f6e9536aa5478322240c199ff4c2f4367922d0
2010-09-28 12:23:55 +02:00
David 'Digit' Turner
a511f24561 am 9973a564: libc: Add missing waitid() implementation.
Merge commit '9973a564222b842eb7497fd6e659fe8c8c49e2b3' into gingerbread-plus-aosp

* commit '9973a564222b842eb7497fd6e659fe8c8c49e2b3':
  libc: Add missing waitid() implementation.
2010-09-28 00:22:25 -07:00
David 'Digit' Turner
defd162212 libc: add <sys/eventfd.h> and corresponding implementations.
Change-Id: Ide040884c456190226e580513099fdb8377e015b
2010-09-28 09:20:37 +02:00
David 'Digit' Turner
052fbd8808 am a3ae60d3: libc: Add missing fdatasync() implementation
Merge commit 'a3ae60d343661784e3f6f4566b276d8e6b8a06a7' into gingerbread-plus-aosp

* commit 'a3ae60d343661784e3f6f4566b276d8e6b8a06a7':
  libc: Add missing fdatasync() implementation
2010-09-28 00:19:31 -07:00
David 'Digit' Turner
9973a56422 libc: Add missing waitid() implementation.
Change-Id: I312ee608dbf9249e4886a10d45d13e3cda8a9042
2010-09-28 09:18:26 +02:00
David 'Digit' Turner
a3ae60d343 libc: Add missing fdatasync() implementation
Change-Id: I04bb655d77e414021e1f2a973329167ad76ca1c4
2010-09-28 09:17:17 +02:00
David 'Digit' Turner
914528cdc9 am 223ddfcf: Merge "libc: Add missing pipe2() declaration and implementation." into gingerbread
Merge commit '223ddfcfc4cb354641e70da31a60556248db5036' into gingerbread-plus-aosp

* commit '223ddfcfc4cb354641e70da31a60556248db5036':
  libc: Add missing pipe2() declaration and implementation.
2010-09-28 00:13:48 -07:00
David 'Digit' Turner
9aac38249b am bd8d987b: libc: remove C++ comments from public headers.
Merge commit 'bd8d987b3c3aa6d9d00cede2cb091f00bdb42204' into gingerbread-plus-aosp

* commit 'bd8d987b3c3aa6d9d00cede2cb091f00bdb42204':
  libc: remove C++ comments from public headers.
2010-09-28 00:13:43 -07:00
David 'Digit' Turner
223ddfcfc4 Merge "libc: Add missing pipe2() declaration and implementation." into gingerbread 2010-09-28 00:12:08 -07:00
Elliott Hughes
8120a8df84 am 3cf53d1a: Fixes for the ARM-specific bswap_16, bswap_32, and bswap_64.
Merge commit '3cf53d1a7814e1520df09d24b009c16f4f27db0d' into gingerbread-plus-aosp

* commit '3cf53d1a7814e1520df09d24b009c16f4f27db0d':
  Fixes for the ARM-specific bswap_16, bswap_32, and bswap_64.
2010-09-27 11:39:39 -07:00
David 'Digit' Turner
bd8d987b3c libc: remove C++ comments from public headers.
Change-Id: I4af84f912062cd2ff34711c25122fb323f20c032
2010-09-27 17:35:26 +02:00
David 'Digit' Turner
275cd48511 libc: Add missing pipe2() declaration and implementation.
Change-Id: Iacb914bd6ac5adc60c5671e6fef680ede21f9b0c
2010-09-27 17:33:08 +02:00
Elliott Hughes
3cf53d1a78 Fixes for the ARM-specific bswap_16, bswap_32, and bswap_64.
1. Make the feature test work by excluding known-deficient processors, so
we don't have to maintain a complete list of all the processors that support
REV and REV16.

2. Don't abuse 'register' to get an effect similar to GCC's +l constraint,
but which was unnecessarily restrictive.

3. Fix __swap64md so _x isn't clobbered, breaking 64-bit swaps.

4. Make <byteswap.h> (which declars bswap_16 and friends) use <endian.h>
rather than <sys/endian.h>, so we get the machine-dependent implementations.

Change-Id: I6a38fad7a9fbe394aff141489617eb3883e1e944
2010-09-26 11:26:53 -07:00
Jean-Baptiste Queru
ef3644d110 am 312be567: Merge "Use ARMv6 instruction for handling byte order"
Merge commit '312be567a03aaf851707a268807ee666b12f8c74' into gingerbread-plus-aosp

* commit '312be567a03aaf851707a268807ee666b12f8c74':
  Use ARMv6 instruction for handling byte order
2010-09-10 16:37:38 -07:00
Jean-Baptiste Queru
312be567a0 Merge "Use ARMv6 instruction for handling byte order" 2010-09-10 16:02:59 -07:00
Keith Deacon
d7b156d2a3 am 3a1bbee3: Add eventfd system call support
Merge commit '3a1bbee36b773862e88c6f1895b607c0cd81b499' into gingerbread-plus-aosp

* commit '3a1bbee36b773862e88c6f1895b607c0cd81b499':
  Add eventfd system call support
2010-09-08 03:06:26 -07:00
Keith Deacon
3a1bbee36b Add eventfd system call support 2010-08-31 16:16:01 -05:00
Jim Huang
aa35095517 Use ARMv6 instruction for handling byte order
ARMv6 ISA has several instructions to handle data in different byte order.
For endian conversion (byte swapping) of single data words, it might be a
good idea to use the REV/REV16 instruction simply.

Change-Id: Ic4a5ed6254e082763e54aa70d428f59a0088636e
2010-08-31 14:51:44 +08:00
Jim Huang
a172709259 bionic: Rename _ARM_HAVE_LDREX_STREX to __ARM_HAVE_LDREX_STREX for consistency
The patch follows the naming manner in existing macros with prefix
__ARM_HAVE.

Change-Id: I6763ce2bf3ee85fd1da112c719543061d8d19bf4
2010-08-09 05:35:11 +08:00
Dima Zavin
18c5bcc66a Revert "Set SA_RESTORER in sigaction()"
This reverts commit e4fa46e75c.
2010-07-29 19:12:04 -07:00
David 'Digit' Turner
ab8b54101e libc: fix fstatfs() implementation.
The syscall expects the size of the buffer as the second argument.

Change-Id: I99ede2fec7fcd385ca03ff022c2cffa4297bea8d
2010-07-08 16:52:27 -07:00
David 'Digit' Turner
3b43f87d29 Allow dlclose() to properly call static C++ destructors.
With this patch _and_ an upcoming build/ patch, the destruction
of static C++ objects contained in shared libraries will happen
properly when dlclose() is called.

Note that this change introduces crtbegin_so.S and crtend_so.S which
are currently ignored by the build system.

+ move definition of __dso_handle to the right place
(before that, all shared libraries used the __dso_handle
global variable from the C library).

Note that we keep a 'weak' __dso_handle in aeabi.c to avoid
breaking the build until the next patch to build/core/combo/
appears. We will be able to remove that later.

+ move bionic/aeabi.c to arch-arm/bionic/ (its proper location)

NOTE: The NDK will need to be modified to enable this feature in
         the shared libraries that are generated through it.

Change-Id: I99cd801375bbaef0581175893d1aa0943211b9bc
2010-07-01 23:09:28 -07:00
David 'Digit' Turner
6a9b888d7c Allow static C++ destructors to be properly called on dlclose().
With this patch, _and_ an upcoming build/ patch, the destruction
of static C++ objects contained in shared libraries will happen
properly when dlclose() is called.

Note that this change introduces crtbegin_so.S and crtend_so.S which
are currently ignored by the build system.

+ move definition of __dso_handle to the right place
  (before that, all shared libraries used the __dso_handle
   global variable from the C library).

  Note that we keep a 'weak' __dso_handle in aeabi.c to avoid
  breaking the build until the next patch to build/core/combo/
  appears. We will be able to remove that later.

+ move bionic/aeabi.c to arch-arm/bionic/ (its proper location)

Change-Id: Ie771aa204e3acbdf02fd30ebd4150373a1398f39
NOTE: The NDK will need to be modified to enable this feature in
      the shared libraries that are generated through it.
2010-06-18 16:07:10 -07:00
David 'Digit' Turner
b8e6c50cfa Fix setjmp()/longjmp() to save FP registers on ARMv7. - DO NOT MERGE
Change-Id: I3a0c2c05e295ac05ed51a531dabda668be204ca0
2010-06-09 13:18:29 -07:00
David 'Digit' Turner
aa4b1d0429 Add missing sysinfo() implementation (already declared in <sys/sysinfo.h>) - DO NOT MERGE
Change-Id: Iac4eb5911ffe4a7ab72b84df44e907685ac816af
2010-06-09 13:12:15 -07:00
Andy McFadden
fcd00ebbdf Atomic/SMP update, part 3.
Update ARM atomic ops to use LDREX/STREX.  Stripped out #if 0 chunk.

Insert explicit memory barriers in pthread and semaphore code.

For bug 2721865.

Change-Id: I0f153b797753a655702d8be41679273d1d5d6ae7
2010-05-28 16:12:01 -07:00