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) 39 FRAMESZ = MKFSIZ(5,0) 40 #else 41 FRAMESZ = MKFSIZ(0,0) 42 #endif 43 44 LEAF(vfork,FRAMESZ) 45 __BIONIC_WEAK_ASM_FOR_NATIVE_BRIDGE(vfork) 46 #if FRAMESZ!=0 47 PTR_SUBU $sp, FRAMESZ 48 #endif 49 SETUP_GP64($a5, vfork) 50 51 // __get_tls()[TLS_SLOT_THREAD_ID]->cached_pid_ = 0 52 rdhwr $v0, $29 // v0 = tls 53 REG_L $v0, REGSZ*1($v0) // v0 = v0[TLS_SLOT_THREAD_ID ie 1] 54 sw $0, REGSZ*2+4($v0) // v0->cached_pid_ = 0 55 56 LI $a0, (CLONE_VM | CLONE_VFORK | SIGCHLD) 57 move $a1, $0 58 move $a2, $0 59 move $a3, $0 60 #if (_MIPS_SIM == _ABIO32) || (_MIPS_SIM == _ABI32) 61 REG_S $0, 4*REGSZ(sp) 62 #else 63 move $a4, $0 64 #endif 65 LI $v0, __NR_clone 66 syscall 67 #if FRAMESZ!=0 68 PTR_ADDU $sp,FRAMESZ 69 #endif 70 move $a0, $v0 71 bnez $a3, 1f 72 RESTORE_GP64 73 j $ra 74 1: 75 LA $t9,__set_errno_internal 76 RESTORE_GP64 77 j $t9 78 END(vfork) 79
