+++ /dev/null
-/* Copyright (C) 1991, 1992 Free Software Foundation, Inc.
-This file is part of the GNU C Library.
-
-The GNU C Library is free software; you can redistribute it and/or
-modify it under the terms of the GNU Library General Public License as
-published by the Free Software Foundation; either version 2 of the
-License, or (at your option) any later version.
-
-The GNU C Library is distributed in the hope that it will be useful,
-but WITHOUT ANY WARRANTY; without even the implied warranty of
-MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
-Library General Public License for more details.
-
-You should have received a copy of the GNU Library General Public
-License along with the GNU C Library; see the file COPYING.LIB. If
-not, write to the Free Software Foundation, Inc., 675 Mass Ave,
-Cambridge, MA 02139, USA. */
-
-
-/* Based on the code from GNU libc, but hacked up by John Beppu and Erik Andersen */
-/* adapted by PaX Team for ET_DYN/PIE binaries */
-
-/*
- When we enter this piece of code, the program stack looks like this:
- argc argument counter (integer)
- argv[0] program name (pointer)
- argv[1...N] program args (pointers)
- argv[argc-1] end of args (integer)
- NULL
- env[0...N] environment variables (pointers)
- NULL
-*/
-
-#include <features.h>
-
-.text
- .align 4
-
- .global _start
- .type _start,%function
-#if defined L_crt0 || defined L_Scrt0 || ! defined __UCLIBC_CTOR_DTOR__
- .type __uClibc_main,%function
-#else
- .weak _init
- .weak _fini
- .type __uClibc_start_main,%function
-#endif
-/* Stick in a dummy reference to main(), so that if an application
- * is linking when the main() function is in a static library (.a)
- * we can be sure that main() actually gets linked in */
- .type main,%function
-
-_start:
- /* locate the start of the environment variables */
- popl %ecx /* Store argc into %ecx */
- movl %esp,%ebx /* Store argv into ebx */
- movl %esp,%eax /* Store argv into eax as well*/
- movl %edx,%esi /* Store edx(FINI ptr) in %esi */
- movl %ecx,%edx /* Stick argc into %edx so we can do some math in a sec */
- leal 4(%eax,%edx,4),%eax
-
- /* [ register layout ]
-
- sizeof(char*) == 4
- %ecx = argc ; 0(esp)
- %ebx = argv ; 4(esp)
- %eax = env ; argv + (argc * 4) + 4
- */
-
- /* Set up an invalid (NULL return address, NULL frame pointer)
- callers stack frame so anybody unrolling the stack knows where
- to stop */
- xorl %ebp,%ebp /* NULL */
- pushl %ebp /* callers %cs */
- pushl %ebp /* callers %eip (return address) */
- pushl %ebp /* callers %ebp (frame pointer) */
- movl %esp,%ebp /* mark callers stack frame as invalid */
-
-#if defined L_Scrt0 || defined L_Scrt1
- call .L0
-.L0:
- pop %edx
- addl $_GLOBAL_OFFSET_TABLE_+[.-.L0],%edx
-#endif
- pushl %esi /* Push FINI pointer */
-#if (defined L_crt1 || defined L_Scrt1) && defined __UCLIBC_CTOR_DTOR__
- /* Push .init and .fini arguments to __uClibc_start_main() on the stack */
-#ifdef L_Scrt1
- pushl _fini@GOT(%edx)
- pushl _init@GOT(%edx)
-#else
- pushl $_fini
- pushl $_init
-#endif
-
- /* Push envp, argc, and argc arguments to __uClibc_start_main() on the stack */
- pushl %eax /* Environment pointer */
- pushl %ebx /* Argument pointer */
- pushl %ecx /* And the argument count */
-
- /* Ok, now run uClibc's main() -- shouldn't return */
-#ifdef L_Scrt1
- call *__uClibc_start_main@GOT(%edx)
-#else
- call __uClibc_start_main
-#endif
-#else
- /* Push envp, argc, and argc arguments to __uClibc_start_main() on the stack */
- pushl %eax /* Environment pointer */
- pushl %ebx /* Argument pointer */
- pushl %ecx /* And the argument count */
-
-#ifdef L_Scrt0
- call *__uClibc_main@GOT(%edx)
-#else
- call __uClibc_main
-#endif
-#endif
-
- /* Crash if somehow `exit' returns anyways. */
- hlt
-.size _start,.-_start
-
-
-/* Define a symbol for the first piece of initialized data. */
- .data
- .globl __data_start
-__data_start:
- .long 0
- .weak data_start
- data_start = __data_start
-
OSDN Git Service
