diff options
| author | Jeff Johnston <jjohnstn@redhat.com> | 2008-12-18 02:08:09 +0300 |
|---|---|---|
| committer | Jeff Johnston <jjohnstn@redhat.com> | 2008-12-18 02:08:09 +0300 |
| commit | d78a82f9397054b7c6b41623e0b7d6a527870b19 (patch) | |
| tree | 38b5724537068738e96af59c032128d7277d8c4b /libgloss/lm32/scall.S | |
| parent | b7d584e643f49aa9505eee6c82689dbba7a188c7 (diff) | |
2008-12-17 Jon Beniston <jon@beniston.com>
* README: Add description of lm32 directory.
* configure.in: Add lm32 target.
* configure: Regenerated.
* libnosys/configure.in: Add lm32 target.
* libnosys/configure: Regenerated.
* lm32: New directory.
* lm32/aclocal.m4: New file.
* lm32/Makefile.in: New file.
* lm32/configure.in: New file.
* lm32/configure: New file.
* lm32/crt0.S: New file.
* lm32/isatty.c: New file.
* lm32/scall.S: New file.
* lm32/sim.ld: New file.
Diffstat (limited to 'libgloss/lm32/scall.S')
| -rw-r--r-- | libgloss/lm32/scall.S | 123 |
1 files changed, 123 insertions, 0 deletions
diff --git a/libgloss/lm32/scall.S b/libgloss/lm32/scall.S new file mode 100644 index 000000000..db423a518 --- /dev/null +++ b/libgloss/lm32/scall.S @@ -0,0 +1,123 @@ +/* + * 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 |