1/* 2 * Copyright (C) 2008 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#include <linux/sched.h> 31 32// TODO: mips' uapi signal.h is missing #ifndef __ASSEMBLY__. 33// #include <asm/signal.h> 34#define SIGCHLD 18 35 36ENTRY(vfork) 37__BIONIC_WEAK_ASM_FOR_NATIVE_BRIDGE(vfork) 38 .set noreorder 39 .cpload $t9 40 41 // __get_tls()[TLS_SLOT_THREAD_ID]->cached_pid_ = 0 42 .set push 43 .set mips32r2 44 rdhwr $v0, $29 // v0 = tls; kernel trap on mips32r1 45 .set pop 46 lw $v0, REGSZ*1($v0) // v0 = v0[TLS_SLOT_THREAD_ID ie 1] 47 sw $0, REGSZ*2+4($v0) // v0->cached_pid_ = 0 48 49 li $a0, (CLONE_VM | CLONE_VFORK | SIGCHLD) 50 li $a1, 0 51 li $a2, 0 52 li $a3, 0 53 subu $sp, 8 54 sw $0, 16($sp) 55 li $v0, __NR_clone 56 syscall 57 addu $sp, 8 58 bnez $a3, 1f 59 move $a0, $v0 60 61 j $ra 62 nop 631: 64 la $t9, __set_errno_internal 65 j $t9 66 nop 67END(vfork) 68