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am b6b2375d: am 8fa9081f: Merge "[MIPS] Rewrite MIPS crtbegin* as C files."

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* commit 'b6b2375df8ca63a5e349d8277d425ab58e16aeb1':
  [MIPS] Rewrite MIPS crtbegin* as C files.
This commit is contained in:
Elliott Hughes 2013-07-17 17:40:46 -07:00 committed by Android Git Automerger
commit ac74b8565a
6 changed files with 115 additions and 232 deletions
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2
libc/Android.mk
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@ -573,7 +573,7 @@ ifeq ($(TARGET_ARCH),arm)
libc_crt_target_so_cflags :=
endif
ifeq ($(TARGET_ARCH),mips)
libc_crtbegin_extension := S
libc_crtbegin_extension := c
libc_crt_target_so_cflags := -fPIC
endif
ifeq ($(TARGET_ARCH),x86)

2
libc/arch-mips/bionic/__dso_handle.S
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@ -33,9 +33,7 @@
.section .bss
.align 4
#ifndef CRT_LEGACY_WORKAROUND
.hidden __dso_handle
#endif
.globl __dso_handle
__dso_handle:

74
libc/arch-mips/bionic/crtbegin_so.S → libc/arch-mips/bionic/atexit.h
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@ -1,5 +1,5 @@
/*
* Copyright (C) 2008 The Android Open Source Project
* Copyright (C) 2013 The Android Open Source Project
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
@ -25,70 +25,12 @@
* OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
.section .init_array, "aw"
.type __INIT_ARRAY__, @object
.globl __INIT_ARRAY__
__INIT_ARRAY__:
.long -1
.section .fini_array, "aw"
.type __FINI_ARRAY__, @object
.globl __FINI_ARRAY__
__FINI_ARRAY__:
.long -1
.long __do_global_dtors_aux
extern void *__dso_handle;
extern int __cxa_atexit(void (*func)(void *), void *arg, void *dso);
.abicalls
.text
.align 2
.set nomips16
.ent __do_global_dtors_aux
.type __do_global_dtors_aux, @function
__do_global_dtors_aux:
.frame $sp,32,$31 # vars= 0, regs= 1/0, args= 16, gp= 8
.mask 0x80000000,-4
.fmask 0x00000000,0
.set noreorder
.cpload $25
.set nomacro
addiu $sp,$sp,-32
sw $31,28($sp)
.cprestore 16
lw $2,%got(completed.1269)($28)
lbu $2,%lo(completed.1269)($2)
bne $2,$0,$L8
nop
$L4:
lw $2,%got(__cxa_finalize)($28)
beq $2,$0,$L6
nop
lw $2,%got(__dso_handle)($28)
lw $4,0($2)
lw $25,%call16(__cxa_finalize)($28)
.reloc 1f,R_MIPS_JALR,__cxa_finalize
1: jalr $25
nop
lw $28,16($sp)
$L6:
lw $2,%got(completed.1269)($28)
li $3,1 # 0x1
sb $3,%lo(completed.1269)($2)
$L8:
lw $31,28($sp)
addiu $sp,$sp,32
j $31
nop
.set macro
.set reorder
.end __do_global_dtors_aux
.size __do_global_dtors_aux, .-__do_global_dtors_aux
.local completed.1269
.comm completed.1269,1,1
.weak __cxa_finalize
#include "__dso_handle_so.S"
#include "atexit.S"
__attribute__ ((visibility ("hidden")))
int atexit(void (*func)(void))
{
return (__cxa_atexit((void (*)(void *))func, (void *)0, &__dso_handle));
}

146
libc/arch-mips/bionic/crtbegin.S
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@ -1,146 +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
.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
#
.ent __start
__start:
_start:
bal 1f
1:
.set noreorder
.cpload $ra
.set reorder
move $a0, $sp
move $a1, $0
la $a2, main
la $a3, 1f
subu $sp, 32
la $t9, __libc_init
j $t9
.end __start
1: .long __PREINIT_ARRAY__
.long __INIT_ARRAY__
.long __FINI_ARRAY__
.section .preinit_array, "aw"
.type __PREINIT_ARRAY__, @object
.globl __PREINIT_ARRAY__
__PREINIT_ARRAY__:
.long -1
.section .init_array, "aw"
.type __INIT_ARRAY__, @object
.globl __INIT_ARRAY__
__INIT_ARRAY__:
.long -1
.section .fini_array, "aw"
.type __FINI_ARRAY__, @object
.globl __FINI_ARRAY__
__FINI_ARRAY__:
.long -1
.long __do_global_dtors_aux
.abicalls
.text
.align 2
.set nomips16
.ent __do_global_dtors_aux
.type __do_global_dtors_aux, @function
__do_global_dtors_aux:
.frame $sp,32,$31 # vars= 0, regs= 1/0, args= 16, gp= 8
.mask 0x80000000,-4
.fmask 0x00000000,0
.set noreorder
.cpload $25
.set nomacro
addiu $sp,$sp,-32
sw $31,28($sp)
.cprestore 16
lw $2,%got(completed.1269)($28)
lbu $2,%lo(completed.1269)($2)
bne $2,$0,$L8
nop
$L4:
lw $2,%got(__cxa_finalize)($28)
beq $2,$0,$L6
nop
lw $2,%got(__dso_handle)($28)
lw $4,0($2)
lw $25,%call16(__cxa_finalize)($28)
.reloc 1f,R_MIPS_JALR,__cxa_finalize
1: jalr $25
nop
lw $28,16($sp)
$L6:
lw $2,%got(completed.1269)($28)
li $3,1 # 0x1
sb $3,%lo(completed.1269)($2)
$L8:
lw $31,28($sp)
addiu $sp,$sp,32
j $31
nop
.set macro
.set reorder
.end __do_global_dtors_aux
.size __do_global_dtors_aux, .-__do_global_dtors_aux
.local completed.1269
.comm completed.1269,1,1
.weak __cxa_finalize
#include "__dso_handle.S"
#include "atexit.S"

94
libc/arch-mips/bionic/crtbegin.c Normal file
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@ -0,0 +1,94 @@
/*
* Copyright (C) 2013 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.
*/
#include "../../bionic/libc_init_common.h"
#include <stddef.h>
#include <stdint.h>
__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;
__LIBC_HIDDEN__ void do_mips_start(void *raw_args) {
structors_array_t array;
array.preinit_array = &__PREINIT_ARRAY__;
array.init_array = &__INIT_ARRAY__;
array.fini_array = &__FINI_ARRAY__;
__libc_init(raw_args, NULL, &main, &array);
}
/*
* This function prepares the return address with a branch-and-link
* instruction (bal) and then uses a .cpload to compute the Global
* Offset Table (GOT) pointer ($gp). The $gp is then used to load
* the address of _do_start() into $t9 just before calling it.
* Terminating the stack with a NULL return address.
*/
__asm__ (
" .set push \n"
" \n"
" .text \n"
" .align 4 \n"
" .type __start,@function \n"
" .globl __start \n"
" .globl _start \n"
" \n"
" .ent __start \n"
"__start: \n"
" _start: \n"
" .frame $sp,32,$ra \n"
" .mask 0x80000000,-4 \n"
" \n"
" .set noreorder \n"
" bal 1f \n"
" nop \n"
"1: \n"
" .cpload $ra \n"
" .set reorder \n"
" \n"
" move $a0, $sp \n"
" addiu $sp, $sp, (-32) \n"
" sw $0, 28($sp) \n"
" la $t9, do_mips_start \n"
" jalr $t9 \n"
" \n"
"2: b 2b \n"
" .end __start \n"
" \n"
" .set pop \n"
);
#include "__dso_handle.h"
#include "atexit.h"

29
libc/arch-mips/bionic/atexit.S → libc/arch-mips/bionic/crtbegin_so.c
View File

@ -1,5 +1,5 @@
/*
* Copyright (C) 2008 The Android Open Source Project
* Copyright (C) 2013 The Android Open Source Project
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
@ -25,19 +25,14 @@
* OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
.text
.globl atexit
.hidden atexit
.type atexit, @function
.align 4
.ent atexit
atexit:
.set noreorder
.cpload $t9
.set reorder
la $t9, __cxa_atexit
move $a1, $0
la $a2, __dso_handle
j $t9
.size atexit, .-atexit
.end atexit
extern void __cxa_finalize(void *);
extern void *__dso_handle;
__attribute__((visibility("hidden"),destructor))
void __on_dlclose() {
__cxa_finalize(&__dso_handle);
}
#include "__dso_handle_so.h"
#include "atexit.h"