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/*
* 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
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