1 /* 2 * Copyright (C) 2012 The Android Open Source Project 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * * Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * * Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in 12 * the documentation and/or other materials provided with the 13 * distribution. 14 * 15 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 16 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 17 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS 18 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE 19 * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, 20 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, 21 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS 22 * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED 23 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, 24 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT 25 * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 26 * SUCH DAMAGE. 27 */ 28 29 #include <stdint.h> 30 #include <sys/cdefs.h> 31 32 extern unsigned __linker_init(void* raw_args); 33 34 __LIBC_HIDDEN__ void _start() { 35 void (*start)(void); 36 37 void* raw_args = (void*) ((uintptr_t) __builtin_frame_address(0) + sizeof(void*)); 38 start = (void(*)(void))__linker_init(raw_args); 39 40 /* linker init returns (%eax) the _entry address in the main image */ 41 /* entry point expects sp to point to raw_args */ 42 43 __asm__ ( 44 "mov %0, %%esp\n\t" 45 "jmp *%1\n\t" 46 : : "r"(raw_args), "r"(start) : 47 ); 48 49 /* Unreachable */ 50 } 51 52 /* Since linker has its own version of crtbegin (this file) it should have */ 53 /* own version of __stack_chk_fail_local for the case when it's built with */ 54 /* stack protector feature */ 55 56 #include "arch-x86/bionic/__stack_chk_fail_local.h" 57
