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/* Startup code for Nios II
Copyright (C) 1995-2016 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.
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 <features.h>
#include <asm/unistd.h>
.global _start
.type _start,@function
.type _init,%function
.type _fini,%function
#ifndef __UCLIBC_CTOR_DTOR__
.weak _init
.weak _fini
#endif
.type main,@function
.type __uClibc_main,@function
.text
_start:
/* Set up the global pointer. */
movhi gp, %hiadj(_gp)
addi gp, gp, %lo(_gp)
/* Save the stack pointer. */
mov r2, sp
/* Create room on the stack for the fini, rtld_fini and stack_end args
to __uClibc_main. */
subi sp, sp, 12
/* Push stack_end */
stw r2, 8(sp)
/* Push rtld_fini */
stw r4, 4(sp)
/* Set up the GOT pointer. */
nextpc r22
1: movhi r2, %hiadj(_gp_got - 1b)
addi r2, r2, %lo(_gp_got - 1b)
add r22, r22, r2
/* r6 == argv */
addi r6, sp, 16
/* r5 == argc */
ldw r5, 12(sp)
/* r4 == main */
movhi r4, %call_hiadj(main)
addi r4, r4, %call_lo(main)
add r4, r4, r22
ldw r4, 0(r4)
/* fp == 0 */
mov fp, zero
/* Let the libc call main and exit with its return code. */
movhi r2, %call_hiadj(__uClibc_main)
addi r2, r2, %call_lo(__uClibc_main)
add r2, r2, r22
ldw r2, 0(r2)
callr r2
/* should never get here....*/
movhi r2, %call_hiadj(abort)
addi r2, r2, %call_lo(abort)
add r2, r2, r22
ldw r2, 0(r2)
callr r2
/* 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
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