| Chris Dearman | effaa78 | 2013-11-13 14:15:31 -0800 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (C) 2013 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 | |
| Elliott Hughes | 851e68a | 2014-02-19 16:53:20 -0800 | [diff] [blame^] | 29 | #include <private/bionic_asm.h> |
| Chris Dearman | effaa78 | 2013-11-13 14:15:31 -0800 | [diff] [blame] | 30 | |
| Chris Dearman | 766c7ef | 2013-12-16 14:10:13 -0800 | [diff] [blame] | 31 | /* |
| 32 | * The caller is only required to allocate 16 bytes of stack for a0-a3. |
| 33 | * syscall has up to 6 arguments, so we need space for the extra two arguments. |
| 34 | */ |
| 35 | #define STACKSIZE 2*4 |
| 36 | |
| Elliott Hughes | 851e68a | 2014-02-19 16:53:20 -0800 | [diff] [blame^] | 37 | ENTRY(syscall) |
| Chris Dearman | effaa78 | 2013-11-13 14:15:31 -0800 | [diff] [blame] | 38 | .set noreorder |
| Elliott Hughes | 851e68a | 2014-02-19 16:53:20 -0800 | [diff] [blame^] | 39 | .cpload t9 |
| 40 | move v0, a0 |
| 41 | move a0, a1 |
| 42 | move a1, a2 |
| 43 | move a2, a3 |
| 44 | lw a3, 16(sp) |
| 45 | lw t0, 20(sp) |
| 46 | lw t1, 24(sp) |
| 47 | subu sp, STACKSIZE |
| 48 | sw t0, 16(sp) |
| 49 | sw t1, 20(sp) |
| Chris Dearman | effaa78 | 2013-11-13 14:15:31 -0800 | [diff] [blame] | 50 | syscall |
| Elliott Hughes | 851e68a | 2014-02-19 16:53:20 -0800 | [diff] [blame^] | 51 | addu sp, STACKSIZE |
| 52 | bnez a3, 1f |
| 53 | move a0, v0 |
| 54 | j ra |
| Chris Dearman | effaa78 | 2013-11-13 14:15:31 -0800 | [diff] [blame] | 55 | nop |
| 56 | 1: |
| Elliott Hughes | 851e68a | 2014-02-19 16:53:20 -0800 | [diff] [blame^] | 57 | la t9,__set_errno |
| 58 | j t9 |
| Chris Dearman | effaa78 | 2013-11-13 14:15:31 -0800 | [diff] [blame] | 59 | nop |
| 60 | .set reorder |
| Elliott Hughes | 851e68a | 2014-02-19 16:53:20 -0800 | [diff] [blame^] | 61 | END(syscall) |