glibc/sysdeps/sparc/sparc32/elf/start.S

/* Startup code for elf32-sparc
   Copyright (C) 1997, 1998 Free Software Foundation, Inc.
   Contributed by Richard Henderson <richard@gnu.ai.mit.edu>, 1997.

   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., 59 Temple Place - Suite 330,
   Boston, MA 02111-1307, USA.  */

#include <sysdep.h>


	.section ".text"
	.align 4
	.global _start
	.type _start,#function
_start:

  /* Terminate the stack frame, and reserve space for functions to
     drop their arguments.  */
	mov	%g0, %fp
	sub	%sp, 6*4, %sp

  /* Extract the arguments and environment as encoded on the stack.  The
     argument info starts after one register window (16 words) past the SP.  */
	ld	[%sp+22*4], %o1
	add	%sp, 23*4, %o2

  /* Load the addresses of the user entry points.  */
	sethi	%hi(main), %o0
	sethi	%hi(_init), %o3
	sethi	%hi(_fini), %o4
	or	%o0, %lo(main), %o0
	or	%o3, %lo(_init), %o3
	or	%o4, %lo(_fini), %o4

  /* When starting a binary via the dynamic linker, %g1 contains the
     address of the shared library termination function, which will be
     registered with atexit().  If we are statically linked, this will
     be NULL.  */
	mov	%g1, %o5

  /* Let libc do the rest of the initialization, and call main.  */
	call	__libc_start_main
	 nop

  /* Die very horribly if exit returns.  */
	unimp

	.size _start, .-_start