newlib/libgloss/cris/crt0.S

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/* Generic simplistic start-up-stub for CRIS/CRISv32.
Copyright (C) 1993-2005 Axis Communications.
All rights reserved.
Redistribution and use in source and binary forms, with or without
modification, are permitted provided that the following conditions
are met:
1. Redistributions of source code must retain the above copyright
notice, this list of conditions and the following disclaimer.
2. Neither the name of Axis Communications nor the names of its
contributors may be used to endorse or promote products derived
from this software without specific prior written permission.
THIS SOFTWARE IS PROVIDED BY AXIS COMMUNICATIONS AND ITS CONTRIBUTORS
``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL AXIS
COMMUNICATIONS OR ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
(INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
POSSIBILITY OF SUCH DAMAGE. */
#undef cris
#undef L
#ifdef __NO_UNDERSCORES__
#define L(x) x
#else
#define L(x) _ ## x
#endif
; Rudimentary v0..v32-compatible startup stub.
#ifdef __ELF__
.section .startup,"ax"
#endif
.global __start
nop
__start:
ba 0f
nop
.rept 256 - 2
.dword _.int
.endr
_.int:
#ifdef __arch_common_v10_v32
; This is just to allow the multilib to compile without
; hackery: the "common" subset doesn't recognize
; interrupt-return insns.
#elif __CRIS_arch_version >= 32
rete
rfe
#else
reti
nop
#endif
0:
move.d __setup,$r9
jsr $r9
nop
#ifdef __ELF__
jsr L(_init)
nop
move.d L(_fini),$r10
jsr L(atexit)
nop
#endif
jsr L(main)
nop
jsr L(exit)
nop
0:
nop
ba 0b
nop