1/*
2 * Copyright (C) 2009 The Android Open Source Project
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 *  * Redistributions of source code must retain the above copyright
9 *    notice, this list of conditions and the following disclaimer.
10 *  * Redistributions in binary form must reproduce the above copyright
11 *    notice, this list of conditions and the following disclaimer in
12 *    the documentation and/or other materials provided with the
13 *    distribution.
14 *
15 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
16 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
17 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
18 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
19 * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
20 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
21 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
22 * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
23 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
24 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
25 * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
26 * SUCH DAMAGE.
27 */
28#include <sys/linux-syscalls.h>
29
30.text
31.type syscall, @function
32.globl syscall
33.align 4
34
35/*
36 * Current implementation assumes that the all syscall
37 * has maximum 7 arguments.
38 */
39syscall:
40    /* get args */
41    mov     r4, r3      /* system call number */
42    mov     r5, r4
43    mov     r6, r5
44    mov     r7, r6
45    mov.l   @r15, r7
46    mov.l   @(4, r15), r0
47    mov.l   @(8, r15), r1
48    mov.l   @(12, r15), r2
49
50    /* invoke trap */
51    trapa   #(7 + 0x10) /* assuming 7 arguments */
52
53    /* check return value */
54    cmp/pz  r0
55    bt      end
56
57    /* keep error number */
58    mov.l   r0, @-r15
59    mov.l   0f, r1
60    jsr     @r1
61    mov     r0, r4
62    mov.l   @r15+, r0
63
64end:
65    rts
66    nop
67
68    .align  2
690:  .long   __set_errno
70