| /* |
| * 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 |