start.s

Glibc 2.3.2源代码(解压后有100多M)

/* Copyright (C) 2001 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 Lesser General Public
   License as published by the Free Software Foundation; either
   version 2.1 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
   Lesser General Public License for more details.

   You should have received a copy of the GNU Lesser General Public
   License along with the GNU C Library; if not, write to the Free
   Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
   02111-1307 USA.  */

	.file	"start.s"
	.toc
T.lsd:	.tc __libc_start_data[tc], __libc_start_data[rw]
T.main:	.tc main[tc], main[rw]
T.init:	.tc __libc_start_init[tc], __libc_start_init[rw]
T.fini:	.tc __libc_start_fini[tc], __libc_start_init[rw]
T.rtld_fini :	 .tc __libc_start_rtld_fini[tc], __libc_start_rtld_fini[rw]

	.globl __start
	.globl .__start
	.globl __libc_start_data

	.extern .__libc_start_main
	.extern .main
	.extern main
	.extern __libc_start_init
	.extern __libc_start_fini
	.extern __libc_start_rtld_fini

/* Text */

	.csect __start[ds]
__start:
	.long .__start, TOC[tc0], 0

	.csect .text[pr]
.__start:

/* No prologue needed, __start does not have to follow the ABI.

 Input from kernel/loader
	r1 :	stack
	r2 :	TOC
	r3 :	argc
	r4 :	argv
	r5 :	envp
	r28 :	data origin
	r29 :	text origin
	r30 :	module count
	r31 :	default processing flag

	If r31 == r30, no special processing is needed, ie r28, r29 & r30
	are not used

 Save input in __libc_start_data */
	l	16, T.lsd(2)
	st	1,  0(16)	/* stack */
	st	2,  4(16)	/* toc */
	st	3,  8(16)	/* argc */
	st	4,  12(16)	/* argv */
	st	5,  16(16)	/* envp */
	st	28, 20(16)	/* data origin */
	st	29, 24(16)	/* text origin */
	st	30, 28(16)	/* module count */
	st	31, 32(16)	/* special */

/* Call __libc_start_main() */

	bl	.__libc_start_main
	nop

/* No epilog needed, __start does not have to follow the ABI */

/* Trace back */
TB.__start:
	.long 0x0
	.long 0xc2040
	.long 0x0
	.long TB.__start - .__start
	.short 7
	.byte "__start"
	.byte 0,0,0

/* Data
 __libc_start_data
 Space to keep libc initialization information */

	.csect __libc_start_data[rw]
__libc_start_data:
/* For kernel/loader input args	*/
	.space 36

/* Externs */
	.long main
init:
	.long __libc_start_init
fini:
	.long __libc_start_fini
rtld_fini:
	.long __libc_start_rtld_fini
	.space 0x1000 + (4 + rtld_fini - __libc_start_data)