| /* |
| * Copyright (C) 2013 The Android Open Source Project |
| * All rights reserved. |
| * |
| * Redistribution and use in source and binary forms, with or without |
| * modification, are permitted provided that the following conditions |
| * are met: |
| * * Redistributions of source code must retain the above copyright |
| * notice, this list of conditions and the following disclaimer. |
| * * 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 COPYRIGHT HOLDERS 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 |
| * COPYRIGHT OWNER 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 <asm/unistd.h> |
| .text |
| .globl syscall |
| .align 4 |
| .ent syscall |
| |
| /* |
| * The caller is only required to allocate 16 bytes of stack for a0-a3. |
| * syscall has up to 6 arguments, so we need space for the extra two arguments. |
| */ |
| #define STACKSIZE 2*4 |
| |
| syscall: |
| .set noreorder |
| .cpload $t9 |
| move $v0, $a0 |
| move $a0, $a1 |
| move $a1, $a2 |
| move $a2, $a3 |
| lw $a3, 16($sp) |
| lw $t0, 20($sp) |
| lw $t1, 24($sp) |
| subu $sp, STACKSIZE |
| sw $t0, 16($sp) |
| sw $t1, 20($sp) |
| syscall |
| addu $sp, STACKSIZE |
| bnez $a3, 1f |
| move $a0, $v0 |
| j $ra |
| nop |
| 1: |
| la $t9,__set_errno |
| j $t9 |
| nop |
| .set reorder |
| .end syscall |