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am 4102c6f2: am b833605a: Merge "Rewrite ARM crtbegin* as C files"

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* commit '4102c6f241153cb04e2fad7900ffbc07841c1381':
  Rewrite ARM crtbegin* as C files
This commit is contained in:
Andrew Hsieh
2012-09-06 18:31:47 -07:00
committed by Android Git Automerger
parent 51535bf8ad 4102c6f241
commit a295480fa6
8 changed files with 231 additions and 283 deletions
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41
ndk/platforms/android-3/arch-arm/src/__dso_handle.S → ndk/platforms/android-3/arch-arm/src/__dso_handle.h
View File

@@ -1,5 +1,5 @@
/*
* Copyright (C) 2010 The Android Open Source Project
* Copyright (C) 2012 The Android Open Source Project
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
@@ -26,30 +26,25 @@
* SUCH DAMAGE.
*/
# The __dso_handle global variable is used by static
# C++ constructors and destructors in the binary.
# See http://www.codesourcery.com/public/cxx-abi/abi.html#dso-dtor
#
.data
.align 4
/* The __dso_handle global variable is used by static
C++ constructors and destructors in the binary.
See http://www.codesourcery.com/public/cxx-abi/abi.html#dso-dtor
/* CRT_LEGACY_WORKAROUND is only defined when building this file
* for the C library. This forces __dso_handle to be exported by
* it. This is only required to ensure binary compatibility with
* old NDK application machine code that contains reference to
* the symbol, but do not have a proper definition for it.
*
* These binaries cannot call their destructorson dlclose(), but
* at least they will not fail to load.
*
* When this file is built for the NDK, CRT_LEGACY_WORKAROUND
* should never be defined.
CRT_LEGACY_WORKAROUND is only defined when building this file
for the C library. This forces __dso_handle to be exported by
it. This is only required to ensure binary compatibility with
old NDK application machine code that contains reference to
the symbol, but do not have a proper definition for it.
These binaries cannot call their destructorson dlclose(), but
at least they will not fail to load.
When this file is built for the NDK, CRT_LEGACY_WORKAROUND
should never be defined.
*/
#ifndef CRT_LEGACY_WORKAROUND
.hidden __dso_handle
__attribute__ ((visibility ("hidden")))
#endif
.globl __dso_handle
__dso_handle:
.long __dso_handle
__attribute__ ((section (".bss")))
void *__dso_handle = (void *) 0;

20
ndk/platforms/android-3/arch-arm/src/__dso_handle_so.S → ndk/platforms/android-3/arch-arm/src/__dso_handle_so.h
View File

@@ -1,5 +1,5 @@
/*
* Copyright (C) 2010 The Android Open Source Project
* Copyright (C) 2012 The Android Open Source Project
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
@@ -26,13 +26,11 @@
* SUCH DAMAGE.
*/
# The __dso_handle global variable is used by static
# C++ constructors and destructors in the binary.
# See http://www.codesourcery.com/public/cxx-abi/abi.html#dso-dtor
#
.data
.align 4
.hidden __dso_handle
.globl __dso_handle
__dso_handle:
.long __dso_handle
/* The __dso_handle global variable is used by static
C++ constructors and destructors in the binary.
See http://www.codesourcery.com/public/cxx-abi/abi.html#dso-dtor
*/
__attribute__ ((visibility ("hidden")))
__attribute__ ((section (".data")))
void *__dso_handle;

40
ndk/platforms/android-3/arch-arm/src/crtbegin_so.S → ndk/platforms/android-3/arch-arm/src/atexit.h
View File

@@ -1,5 +1,5 @@
/*
* Copyright (C) 2008 The Android Open Source Project
* Copyright (C) 2012 The Android Open Source Project
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
@@ -26,36 +26,10 @@
* SUCH DAMAGE.
*/
# Implement static C++ destructors when the shared
# library is unloaded through dlclose().
#
# A call to this function must be the first entry
# in the .fini_array. See 3.3.5.3.C of C++ ABI
# standard.
#
__on_dlclose:
adr r0, 0f
ldr r0, [r0]
b __cxa_finalize
extern void *__dso_handle;
0:
.long __dso_handle
.section .init_array, "aw"
.globl __INIT_ARRAY__
__INIT_ARRAY__:
.long -1
.section .fini_array, "aw"
.globl __FINI_ARRAY__
__FINI_ARRAY__:
.long -1
.long __on_dlclose
#ifdef CRT_LEGACY_WORKAROUND
#include "__dso_handle.S"
#else
#include "__dso_handle_so.S"
#endif
#include "atexit.S"
__attribute__ ((visibility ("hidden")))
int atexit(void (*func)(void))
{
return (__cxa_atexit((void (*)(void *))func, (void *)0, &__dso_handle));
}

87
ndk/platforms/android-3/arch-arm/src/crtbegin_dynamic.S
View File

@@ -1,87 +0,0 @@
/*
* Copyright (C) 2008 The Android Open Source Project
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
* OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
.text
.align 4
.type _start,#function
.globl _start
# this is the small startup code that is first run when
# any executable that is dynamically-linked with Bionic
# runs.
#
# it's purpose is to call __libc_init with appropriate
# arguments, which are:
#
# - the address of the raw data block setup by the Linux
# kernel ELF loader
#
# - address of an "onexit" function, not used on any
# platform supported by Bionic
#
# - address of the "main" function of the program.
#
# - address of the constructor list
#
_start:
mov r0, sp
mov r1, #0
ldr r2, =main
adr r3, 1f
ldr r4, =__libc_init
# Use blx intead of bx so stack unwinding past __libc_init can terminate at _start
blx r4
mov r0, #0
bx r0
1: .long __PREINIT_ARRAY__
.long __INIT_ARRAY__
.long __FINI_ARRAY__
.long __CTOR_LIST__
.section .preinit_array, "aw"
.globl __PREINIT_ARRAY__
__PREINIT_ARRAY__:
.long -1
.section .init_array, "aw"
.globl __INIT_ARRAY__
__INIT_ARRAY__:
.long -1
.section .fini_array, "aw"
.globl __FINI_ARRAY__
__FINI_ARRAY__:
.long -1
.section .ctors, "aw"
.globl __CTOR_LIST__
__CTOR_LIST__:
.long -1
#include "__dso_handle.S"
#include "atexit.S"

91
ndk/platforms/android-3/arch-arm/src/crtbegin_dynamic.c Normal file
View File

@@ -0,0 +1,91 @@
/*
* Copyright (C) 2012 The Android Open Source Project
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
* OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
typedef struct
{
void (**preinit_array)(void);
void (**init_array)(void);
void (**fini_array)(void);
void (**ctor_list)(void);
} structors_array_t;
extern int main(int argc, char **argv, char **env);
extern void __libc_init(
unsigned int *elfdata,
void (*onexit)(void),
int (*slingshot)(int, char**, char**),
structors_array_t const * const structors
);
__attribute__ ((section (".preinit_array")))
void (*__PREINIT_ARRAY__)(void) = (void (*)(void)) -1;
__attribute__ ((section (".init_array")))
void (*__INIT_ARRAY__)(void) = (void (*)(void)) -1;
__attribute__ ((section (".fini_array")))
void (*__FINI_ARRAY__)(void) = (void (*)(void)) -1;
__attribute__ ((section (".ctors")))
void (*__CTOR_LIST__)(void) = (void (*)(void)) -1;
/* this is the small startup code that is first run when
any executable that is dynamically-linked with Bionic
runs.
it's purpose is to call __libc_init with appropriate
arguments, which are:
- the address of the raw data block setup by the Linux
kernel ELF loader
- address of an "onexit" function, not used on any
platform supported by Bionic
- address of the "main" function of the program.
- address of the constructor list
*/
__attribute__((visibility("hidden")))
void _start() {
structors_array_t array;
void *elfdata;
array.preinit_array = &__PREINIT_ARRAY__;
array.init_array = &__INIT_ARRAY__;
array.fini_array = &__FINI_ARRAY__;
array.ctor_list = &__CTOR_LIST__;
elfdata = __builtin_frame_address(0) + sizeof(void *);
__libc_init(elfdata, (void *) 0, &main, &array);
}
#include "__dso_handle.h"
#include "atexit.h"

55
ndk/platforms/android-3/arch-arm/src/atexit.S → ndk/platforms/android-3/arch-arm/src/crtbegin_so.c
View File

@@ -1,5 +1,5 @@
/*
* Copyright (C) 2011 The Android Open Source Project
* Copyright (C) 2012 The Android Open Source Project
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
@@ -26,6 +26,14 @@
* SUCH DAMAGE.
*/
extern void __cxa_finalize(void *);
extern void *__dso_handle;
__attribute__((visibility("hidden"),destructor))
void __on_dlclose() {
__cxa_finalize(&__dso_handle);
}
/* CRT_LEGACY_WORKAROUND should only be defined when building
* this file as part of the platform's C library.
*
@@ -41,43 +49,10 @@
* This function must be global *and* hidden. Only the
* code inside the same ELF binary should be able to access it.
*/
#ifndef CRT_LEGACY_WORKAROUND
.arch armv5te
.fpu softvfp
.eabi_attribute 20, 1
.eabi_attribute 21, 1
.eabi_attribute 23, 3
.eabi_attribute 24, 1
.eabi_attribute 25, 1
.eabi_attribute 26, 2
.eabi_attribute 30, 4
.eabi_attribute 18, 4
.hidden atexit
.code 16
.thumb_func
.text
.align 0
.global atexit
.type atexit, #function
atexit: .fnstart
.LFB0:
.save {r4, lr}
push {r4, lr}
.LCFI0:
ldr r3, .L3
mov r1, #0
@ sp needed for prologue
.LPIC0:
add r3, pc
ldr r2, [r3]
ldr r3, =__cxa_atexit
blx r3
pop {r4, pc}
.L4:
.align 2
.L3:
.word __dso_handle-(.LPIC0+4)
.LFE0:
.fnend
.size atexit, . - atexit
#ifdef CRT_LEGACY_WORKAROUND
#include "__dso_handle.h"
#else
#include "__dso_handle_so.h"
#include "atexit.h"
#endif

89
ndk/platforms/android-3/arch-arm/src/crtbegin_static.S
View File

@@ -1,89 +0,0 @@
/*
* Copyright (C) 2008 The Android Open Source Project
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
* OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
.text
.align 4
.type _start,#function
.globl _start
# this is the small startup code that is first run when
# any executable that is statically-linked with Bionic
# runs.
#
# it's purpose is to call __libc_init with appropriate
# arguments, which are:
#
# - the address of the raw data block setup by the Linux
# kernel ELF loader
#
# - address of an "onexit" function, not used on any
# platform supported by Bionic
#
# - address of the "main" function of the program.
#
# - address of the constructor list
#
_start:
mov r0, sp
mov r1, #0
ldr r2, =main
adr r3, 1f
ldr r4, =__libc_init
# Use blx intead of bx so stack unwinding past __libc_init can terminate at _start
blx r4
mov r0, #0
bx r0
1: .long __PREINIT_ARRAY__
.long __INIT_ARRAY__
.long __FINI_ARRAY__
.long __CTOR_LIST__
.section .preinit_array, "aw"
.globl __PREINIT_ARRAY__
__PREINIT_ARRAY__:
.long -1
.section .init_array, "aw"
.globl __INIT_ARRAY__
__INIT_ARRAY__:
.long -1
.section .fini_array, "aw"
.globl __FINI_ARRAY__
__FINI_ARRAY__:
.long -1
.section .ctors, "aw"
.globl __CTOR_LIST__
__CTOR_LIST__:
.long -1
#include "__dso_handle.S"
/* NOTE: atexit() is not be provided by crtbegin_static.S, but by libc.a */

91
ndk/platforms/android-3/arch-arm/src/crtbegin_static.c Normal file
View File

@@ -0,0 +1,91 @@
/*
* Copyright (C) 2012 The Android Open Source Project
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
* OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
typedef struct
{
void (**preinit_array)(void);
void (**init_array)(void);
void (**fini_array)(void);
void (**ctor_list)(void);
} structors_array_t;
extern int main(int argc, char **argv, char **env);
extern void __libc_init(
unsigned int *elfdata,
void (*onexit)(void),
int (*slingshot)(int, char**, char**),
structors_array_t const * const structors
);
__attribute__ ((section (".preinit_array")))
void (*__PREINIT_ARRAY__)(void) = (void (*)(void)) -1;
__attribute__ ((section (".init_array")))
void (*__INIT_ARRAY__)(void) = (void (*)(void)) -1;
__attribute__ ((section (".fini_array")))
void (*__FINI_ARRAY__)(void) = (void (*)(void)) -1;
__attribute__ ((section (".ctors")))
void (*__CTOR_LIST__)(void) = (void (*)(void)) -1;
/* this is the small startup code that is first run when
any executable that is statically-linked with Bionic
runs.
it's purpose is to call __libc_init with appropriate
arguments, which are:
- the address of the raw data block setup by the Linux
kernel ELF loader
- address of an "onexit" function, not used on any
platform supported by Bionic
- address of the "main" function of the program.
- address of the constructor list
*/
__attribute__((visibility("hidden")))
void _start() {
structors_array_t array;
void *elfdata;
array.preinit_array = &__PREINIT_ARRAY__;
array.init_array = &__INIT_ARRAY__;
array.fini_array = &__FINI_ARRAY__;
array.ctor_list = &__CTOR_LIST__;
elfdata = __builtin_frame_address(0) + sizeof(void *);
__libc_init(elfdata, (void *) 0, &main, &array);
}
#include "__dso_handle.h"
/* NOTE: atexit() is not be provided by crtbegin_static.c, but by libc.a */