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 29 #include <private/bionic_asm.h> 30 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 37 ENTRY(syscall) 38 .set noreorder 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) 50 syscall 51 addu $sp, STACKSIZE 52 bnez $a3, 1f 53 move $a0, $v0 54 j $ra 55 nop 56 1: 57 la $t9, __set_errno_internal 58 j $t9 59 nop 60 .set reorder 61 END(syscall) 62
