mirror of
https://github.com/autc04/Retro68.git
synced 2024-09-09 12:54:40 +00:00
124 lines
3.5 KiB
ArmAsm
124 lines
3.5 KiB
ArmAsm
/*
|
|
* Lattice Mico32 system calls.
|
|
* Contributed by Jon Beniston <jon@beniston.com>
|
|
*
|
|
* 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. Redistributions in binary form must reproduce the above copyright
|
|
* notice, this list of conditions and the following disclaimer in the
|
|
* documentation and/or other materials provided with the distribution.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND 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 THE AUTHOR OR 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.
|
|
*/
|
|
|
|
#include <syscall.h>
|
|
|
|
/*
|
|
* System call convention (as implemented in simulator:
|
|
* - System call number in register r8
|
|
* - Return value in r1 and r2 (only if 64-bit value)
|
|
* - errno in r3
|
|
*/
|
|
|
|
.extern errno
|
|
|
|
.global _write
|
|
_write:
|
|
mvi r8, SYS_write
|
|
scall
|
|
mvhi r4, hi(errno)
|
|
ori r4, r4, lo(errno)
|
|
sw (r4+0), r3
|
|
ret
|
|
|
|
.global _read
|
|
_read:
|
|
mvi r8, SYS_read
|
|
scall
|
|
mvhi r4, hi(errno)
|
|
ori r4, r4, lo(errno)
|
|
sw (r4+0), r3
|
|
ret
|
|
|
|
.global _open
|
|
_open:
|
|
mvi r8, SYS_open
|
|
scall
|
|
mvhi r4, hi(errno)
|
|
ori r4, r4, lo(errno)
|
|
sw (r4+0), r3
|
|
ret
|
|
|
|
.global _close
|
|
_close:
|
|
mvi r8, SYS_close
|
|
scall
|
|
mvhi r4, hi(errno)
|
|
ori r4, r4, lo(errno)
|
|
sw (r4+0), r3
|
|
ret
|
|
|
|
.global _lseek
|
|
_lseek:
|
|
mvi r8, SYS_lseek
|
|
scall
|
|
mvhi r4, hi(errno)
|
|
ori r4, r4, lo(errno)
|
|
sw (r4+0), r3
|
|
ret
|
|
|
|
.global _fstat
|
|
_fstat:
|
|
mvi r8, SYS_fstat
|
|
scall
|
|
mvhi r4, hi(errno)
|
|
ori r4, r4, lo(errno)
|
|
sw (r4+0), r3
|
|
ret
|
|
|
|
.global _stat
|
|
_stat:
|
|
mvi r8, SYS_stat
|
|
scall
|
|
mvhi r4, hi(errno)
|
|
ori r4, r4, lo(errno)
|
|
sw (r4+0), r3
|
|
ret
|
|
|
|
.global _link
|
|
_link:
|
|
mvi r8, SYS_link
|
|
scall
|
|
mvhi r4, hi(errno)
|
|
ori r4, r4, lo(errno)
|
|
sw (r4+0), r3
|
|
ret
|
|
|
|
.global _unlink
|
|
_unlink:
|
|
mvi r8, SYS_unlink
|
|
scall
|
|
mvhi r4, hi(errno)
|
|
ori r4, r4, lo(errno)
|
|
sw (r4+0), r3
|
|
ret
|
|
|
|
.global _exit
|
|
_exit:
|
|
/* This call doesn't return */
|
|
mvi r8, SYS_exit
|
|
scall
|