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 36 .text 37 38#if (_MIPS_SIM == _ABIO32) || (_MIPS_SIM == _ABI32) 39FRAMESZ = MKFSIZ(5,0) 40#else 41FRAMESZ = MKFSIZ(0,0) 42#endif 43 44LEAF(vfork,FRAMESZ) 45#if FRAMESZ!=0 46 PTR_SUBU sp, FRAMESZ 47#endif 48 SETUP_GP64(a5, vfork) 49 50 // __get_tls()[TLS_SLOT_THREAD_ID]->cached_pid_ = 0 51 rdhwr v0, $29 // v0 = tls 52 REG_L v0, REGSZ*1(v0) // v0 = v0[TLS_SLOT_THREAD_ID ie 1] 53 sw $0, REGSZ*2+4(v0) // v0->cached_pid_ = 0 54 55 LI a0, (CLONE_VM | CLONE_VFORK | SIGCHLD) 56 move a1, $0 57 move a2, $0 58 move a3, $0 59#if (_MIPS_SIM == _ABIO32) || (_MIPS_SIM == _ABI32) 60 REG_S $0, 4*REGSZ(sp) 61#else 62 move a4, $0 63#endif 64 LI v0, __NR_clone 65 syscall 66#if FRAMESZ!=0 67 PTR_ADDU sp,FRAMESZ 68#endif 69 move a0, v0 70 bnez a3, 1f 71 RESTORE_GP64 72 j ra 731: 74 LA t9,__set_errno_internal 75 RESTORE_GP64 76 j t9 77 END(vfork) 78