Subversion Repositories HelenOS

Rev

Rev 2071 | Details | Compare with Previous | Last modification | View Log | RSS feed

Rev Author Line No. Line
499 decky 1
/*
2071 jermar 2
 * Copyright (c) 2005 Martin Decky
499 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
 
1657 cejka 29
 /** @addtogroup libcmips32
1656 cejka 30
 * @{
31
 */
32
/** @file
1657 cejka 33
  * @ingroup libcmips32eb  
1656 cejka 34
 */
35
 
499 decky 36
#include <libc.h>
37
 
954 palkovsky 38
sysarg_t __syscall(const sysarg_t p1, const sysarg_t p2,
960 palkovsky 39
           const sysarg_t p3, const sysarg_t p4,
40
           const syscall_t id)
499 decky 41
{
505 decky 42
    register sysarg_t __mips_reg_a0 asm("$4") = p1;
43
    register sysarg_t __mips_reg_a1 asm("$5") = p2;
44
    register sysarg_t __mips_reg_a2 asm("$6") = p3;
960 palkovsky 45
    register sysarg_t __mips_reg_a3 asm("$7") = p4;
1095 palkovsky 46
    register sysarg_t __mips_reg_v0 asm("$2") = id;
499 decky 47
 
48
    asm volatile (
49
        "syscall\n"
504 decky 50
        : "=r" (__mips_reg_v0)
499 decky 51
        : "r" (__mips_reg_a0),
52
          "r" (__mips_reg_a1),
53
          "r" (__mips_reg_a2),
960 palkovsky 54
          "r" (__mips_reg_a3),
1095 palkovsky 55
          "r" (__mips_reg_v0)
1098 palkovsky 56
        : "%ra" /* We are a function call, although C does not
57
             * know it */
499 decky 58
    );
504 decky 59
 
60
    return __mips_reg_v0;
499 decky 61
}
1656 cejka 62
 
63
 /** @}
64
 */
65