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Change L_Scrt1 to __PIC__ and delete old crt0.S

Joakim Tjernlund 19 年之前
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802af2a812
共有 2 個文件被更改,包括 1 次插入133 次删除
  1. 0 132
      libc/sysdeps/linux/i386/crt0.S
  2. 1 1
      libc/sysdeps/linux/i386/crt1.S

+ 0 - 132
libc/sysdeps/linux/i386/crt0.S

@@ -1,132 +0,0 @@
-/* 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
-

+ 1 - 1
libc/sysdeps/linux/i386/crt1.S

@@ -87,7 +87,7 @@ _start:
 	pushl %edx		/* Push address of the shared library
 				   termination function.  */
 
-#if defined L_Scrt1
+#ifdef __PIC__
 	/* Load PIC register.  */
 	call .L0
 .L0: