102 lines
3.5 KiB
ArmAsm
102 lines
3.5 KiB
ArmAsm
/* Startup code for elf64-sparc
|
|
Copyright (C) 1997, 1998, 2002, 2004, 2007, 2009
|
|
Free Software Foundation, Inc.
|
|
This file is part of the GNU C Library.
|
|
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 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.
|
|
|
|
In addition to the permissions in the GNU Lesser General Public
|
|
License, the Free Software Foundation gives you unlimited
|
|
permission to link the compiled version of this file with other
|
|
programs, and to distribute those programs without any restriction
|
|
coming from the use of this file. (The GNU Lesser General Public
|
|
License restrictions do apply in other respects; for example, they
|
|
cover modification of the file, and distribution when not linked
|
|
into another program.)
|
|
|
|
Note that people who make modified versions of this file are not
|
|
obligated to grant this special exception for their modified
|
|
versions; it is their choice whether to do so. The GNU Lesser
|
|
General Public License gives permission to release a modified
|
|
version without this exception; this exception also makes it
|
|
possible to release a modified version which carries forward this
|
|
exception.
|
|
|
|
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, see
|
|
<http://www.gnu.org/licenses/>. */
|
|
|
|
#include <sysdep.h>
|
|
|
|
|
|
.section ".text"
|
|
.align 4
|
|
.global _start
|
|
.type _start,#function
|
|
_start:
|
|
#ifdef SHARED
|
|
SETUP_PIC_REG(l7)
|
|
#endif
|
|
|
|
/* Terminate the stack frame, and reserve space for functions to
|
|
drop their arguments. */
|
|
mov %g0, %fp
|
|
sub %sp, 6*8, %sp
|
|
|
|
/* Extract the arguments and environment as encoded on the stack. The
|
|
argument info starts after one register window (16 words) past the SP,
|
|
plus the bias we added, plus the magic v9 STACK_BIAS. */
|
|
ldx [%sp+STACK_BIAS+22*8], %o1
|
|
add %sp, STACK_BIAS+23*8, %o2
|
|
|
|
/* Load the addresses of the user entry points. */
|
|
#ifndef SHARED
|
|
sethi %hi(main), %o0
|
|
sethi %hi(__libc_csu_init), %o3
|
|
sethi %hi(__libc_csu_fini), %o4
|
|
or %o0, %lo(main), %o0
|
|
or %o3, %lo(__libc_csu_init), %o3
|
|
or %o4, %lo(__libc_csu_fini), %o4
|
|
#else
|
|
sethi %gdop_hix22(main), %o0
|
|
sethi %gdop_hix22(__libc_csu_init), %o3
|
|
sethi %gdop_hix22(__libc_csu_fini), %o4
|
|
xor %o0, %gdop_lox10(main), %o0
|
|
xor %o3, %gdop_lox10(__libc_csu_init), %o3
|
|
xor %o4, %gdop_lox10(__libc_csu_fini), %o4
|
|
ldx [%l7 + %o0], %o0, %gdop(main)
|
|
ldx [%l7 + %o3], %o3, %gdop(__libc_csu_init)
|
|
ldx [%l7 + %o4], %o4, %gdop(__libc_csu_fini)
|
|
#endif
|
|
|
|
/* 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. */
|
|
illtrap 0
|
|
|
|
.size _start, .-_start
|
|
|
|
/* Define a symbol for the first piece of initialized data. */
|
|
.data
|
|
.globl __data_start
|
|
__data_start:
|
|
.long 0
|
|
weak_alias (__data_start, data_start)
|