| 1 | /*
|
|---|
| 2 | * Copyright (c) 2005 Martin Decky
|
|---|
| 3 | * All rights reserved.
|
|---|
| 4 | *
|
|---|
| 5 | * Redistribution and use in source and binary forms, with or without
|
|---|
| 6 | * modification, are permitted provided that the following conditions
|
|---|
| 7 | * are met:
|
|---|
| 8 | *
|
|---|
| 9 | * - Redistributions of source code must retain the above copyright
|
|---|
| 10 | * notice, this list of conditions and the following disclaimer.
|
|---|
| 11 | * - Redistributions in binary form must reproduce the above copyright
|
|---|
| 12 | * notice, this list of conditions and the following disclaimer in the
|
|---|
| 13 | * documentation and/or other materials provided with the distribution.
|
|---|
| 14 | * - The name of the author may not be used to endorse or promote products
|
|---|
| 15 | * derived from this software without specific prior written permission.
|
|---|
| 16 | *
|
|---|
| 17 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
|
|---|
| 18 | * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
|
|---|
| 19 | * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
|
|---|
| 20 | * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
|
|---|
| 21 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
|
|---|
| 22 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
|
|---|
| 23 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
|
|---|
| 24 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
|
|---|
| 25 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
|
|---|
| 26 | * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
|
|---|
| 27 | */
|
|---|
| 28 |
|
|---|
| 29 | /** @addtogroup libcmips32
|
|---|
| 30 | * @{
|
|---|
| 31 | */
|
|---|
| 32 | /** @file
|
|---|
| 33 | * @ingroup libcmips32
|
|---|
| 34 | */
|
|---|
| 35 |
|
|---|
| 36 | #include <libc.h>
|
|---|
| 37 |
|
|---|
| 38 | sysarg_t __syscall(const sysarg_t p1, const sysarg_t p2, const sysarg_t p3,
|
|---|
| 39 | const sysarg_t p4, const sysarg_t p5, const sysarg_t p6, const syscall_t id)
|
|---|
| 40 | {
|
|---|
| 41 | register sysarg_t __mips_reg_a0 asm("$4") = p1;
|
|---|
| 42 | register sysarg_t __mips_reg_a1 asm("$5") = p2;
|
|---|
| 43 | register sysarg_t __mips_reg_a2 asm("$6") = p3;
|
|---|
| 44 | register sysarg_t __mips_reg_a3 asm("$7") = p4;
|
|---|
| 45 | register sysarg_t __mips_reg_t0 asm("$8") = p5;
|
|---|
| 46 | register sysarg_t __mips_reg_t1 asm("$9") = p6;
|
|---|
| 47 | register sysarg_t __mips_reg_v0 asm("$2") = id;
|
|---|
| 48 |
|
|---|
| 49 | asm volatile (
|
|---|
| 50 | "syscall\n"
|
|---|
| 51 | : "=r" (__mips_reg_v0)
|
|---|
| 52 | : "r" (__mips_reg_a0),
|
|---|
| 53 | "r" (__mips_reg_a1),
|
|---|
| 54 | "r" (__mips_reg_a2),
|
|---|
| 55 | "r" (__mips_reg_a3),
|
|---|
| 56 | "r" (__mips_reg_t0),
|
|---|
| 57 | "r" (__mips_reg_t1),
|
|---|
| 58 | "r" (__mips_reg_v0)
|
|---|
| 59 | :
|
|---|
| 60 | /*
|
|---|
| 61 | * We are a function call, although C
|
|---|
| 62 | * does not know it.
|
|---|
| 63 | */
|
|---|
| 64 | "%ra",
|
|---|
| 65 | /*
|
|---|
| 66 | * Clobber memory too as some arguments might be
|
|---|
| 67 | * actually pointers.
|
|---|
| 68 | */
|
|---|
| 69 | "memory"
|
|---|
| 70 | );
|
|---|
| 71 |
|
|---|
| 72 | return __mips_reg_v0;
|
|---|
| 73 | }
|
|---|
| 74 |
|
|---|
| 75 | /** @}
|
|---|
| 76 | */
|
|---|
