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/* Startup code for elf32-sparc
Copyright (C) 1997 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
/* Save %g1. When starting a binary via the dynamic linker, %g1
contains the address of the shared library termination function,
which we will register below with atexit() to be called by exit().
If we are statically linked, this will be NULL. */
/* Do essential libc initialization (sp points to argc, argv, and envp) */
call __libc_init_first
mov %g1, %l0
/* Now that we have the proper stack frame, register library termination
function, if there is any: */
cmp %l0, 0
beq 1f
nop
call atexit
mov %l0, %o0
1:
/* 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], %o0
add %sp, 23*4, %o1
sll %o0, 4, %o2
add %o2, %o1, %o2
sethi %hi(__environ), %g2
add %o2, 4, %o2
st %o2, [%g2+%lo(__environ)]
mov %o0, %l0 /* tuck them away */
mov %o1, %l1
/* Call _init, the entry point to our own .init section. */
call _init
mov %o2, %l2
/* Register our .fini section with atexit. */
sethi %hi(_fini), %o0
call atexit
add %o0, %lo(_fini), %o0
/* Call the user's main and exit with its return value. */
mov %l0, %o0
mov %l1, %o1
call main
mov %l2, %o2
call exit
nop
/* Die very horribly if exit returns. */
unimp
.size _start,.-_start
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