| /* |
| * Copyright (C) 2008 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 <private/bionic_asm.h> |
| #include <linux/sched.h> |
| |
| // TODO: mips' uapi signal.h is missing #ifndef __ASSEMBLY__. |
| // #include <asm/signal.h> |
| #define SIGCHLD 18 |
| |
| ENTRY(vfork) |
| __BIONIC_WEAK_ASM_FOR_NATIVE_BRIDGE(vfork) |
| .set noreorder |
| .cpload $t9 |
| |
| // __get_tls()[TLS_SLOT_THREAD_ID]->cached_pid_ = 0 |
| .set push |
| .set mips32r2 |
| rdhwr $v0, $29 // v0 = tls; kernel trap on mips32r1 |
| .set pop |
| lw $v0, REGSZ*1($v0) // v0 = v0[TLS_SLOT_THREAD_ID ie 1] |
| sw $0, REGSZ*2+4($v0) // v0->cached_pid_ = 0 |
| |
| li $a0, (CLONE_VM | CLONE_VFORK | SIGCHLD) |
| li $a1, 0 |
| li $a2, 0 |
| li $a3, 0 |
| subu $sp, 8 |
| sw $0, 16($sp) |
| li $v0, __NR_clone |
| syscall |
| addu $sp, 8 |
| bnez $a3, 1f |
| move $a0, $v0 |
| |
| j $ra |
| nop |
| 1: |
| la $t9, __set_errno_internal |
| j $t9 |
| nop |
| END(vfork) |