| /* |
| * 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. |
| */ |
| |
| #include "../../bionic/libc_init_common.h" |
| #include <stddef.h> |
| #include <stdint.h> |
| |
| #define SECTION(name) __attribute__((__section__(name))) |
| SECTION(".preinit_array") init_func_t* __PREINIT_ARRAY__ = (init_func_t*)-1; |
| SECTION(".init_array.0") init_func_t* __INIT_ARRAY__ = (init_func_t*)-1; |
| SECTION(".fini_array.0") fini_func_t* __FINI_ARRAY__ = (fini_func_t*)-1; |
| #undef SECTION |
| |
| __used static void _start_main(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); |
| } |
| |
| #define PRE ".text; .global _start; .type _start,%function; _start:" |
| #define POST "; .size _start, .-_start" |
| |
| #if defined(__aarch64__) |
| __asm__(PRE "bti j; mov x0,sp; b _start_main" POST); |
| #elif defined(__arm__) |
| __asm__(PRE "mov r0,sp; b _start_main" POST); |
| #elif defined(__i386__) |
| __asm__(PRE "movl %esp,%eax; andl $~0xf,%esp; subl $12,%esp; pushl %eax; calll _start_main" POST); |
| #elif defined(__x86_64__) |
| __asm__(PRE "movq %rsp,%rdi; andq $~0xf,%rsp; callq _start_main" POST); |
| #else |
| #error unsupported architecture |
| #endif |
| |
| #undef PRE |
| #undef POST |
| |
| // On arm32 and arm64, when targeting Q and up, overalign the TLS segment to |
| // (8 * sizeof(void*)), which reserves enough space between the thread pointer |
| // and the executable's TLS segment for Bionic's TLS slots. It has the side |
| // effect of placing a 0-sized TLS segment into Android executables that don't |
| // use TLS, but this should be harmless. |
| // |
| // To ensure that the .tdata input section isn't deleted (e.g. by |
| // --gc-sections), the .text input section (which contains _start) has a |
| // relocation to the .tdata input section. |
| #if __ANDROID_API__ >= 29 |
| #if defined(__arm__) |
| asm(" .section .tdata,\"awT\",%progbits\n" |
| " .p2align 5\n" |
| " .text\n" |
| " .reloc 0, R_ARM_NONE, .tdata\n"); |
| #elif defined(__aarch64__) |
| asm(" .section .tdata,\"awT\",@progbits\n" |
| " .p2align 6\n" |
| " .text\n" |
| " .reloc 0, R_AARCH64_NONE, .tdata\n"); |
| #endif |
| #endif |
| |
| #include "__dso_handle.h" |
| #include "atexit.h" |
| #include "pthread_atfork.h" |
| #ifdef __i386__ |
| # include "../../arch-x86/bionic/__stack_chk_fail_local.h" |
| #endif |