| Serban Constantinescu | e210488 | 2013-09-26 11:37:10 +0100 | [diff] [blame] | 1 | /* |
| Dan Albert | 6a91887 | 2014-08-05 20:53:31 +0000 | [diff] [blame] | 2 | * Copyright (C) 2008 The Android Open Source Project |
| Elliott Hughes | 54a7494 | 2014-01-03 16:40:37 -0800 | [diff] [blame] | 3 | * All rights reserved. |
| Serban Constantinescu | e210488 | 2013-09-26 11:37:10 +0100 | [diff] [blame] | 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 | |
| Dan Albert | 6a91887 | 2014-08-05 20:53:31 +0000 | [diff] [blame] | 29 | #include <private/bionic_asm.h> |
| 30 | #include <linux/sched.h> |
| Serban Constantinescu | e210488 | 2013-09-26 11:37:10 +0100 | [diff] [blame] | 31 | |
| Dan Albert | 6a91887 | 2014-08-05 20:53:31 +0000 | [diff] [blame] | 32 | // TODO: mips' uapi signal.h is missing #ifndef __ASSEMBLY__. |
| 33 | // #include <asm/signal.h> |
| 34 | #define SIGCHLD 18 |
| 35 | |
| 36 | ENTRY(vfork) |
| 37 | .set noreorder |
| 38 | .cpload t9 |
| 39 | |
| Duane Sand | 61d9ae5 | 2015-08-11 17:00:56 -0700 | [diff] [blame] | 40 | // __get_tls()[TLS_SLOT_THREAD_ID]->cached_pid_ = 0 |
| 41 | .set push |
| 42 | .set mips32r2 |
| 43 | rdhwr v0, $29 // v0 = tls; kernel trap on mips32r1 |
| 44 | .set pop |
| 45 | lw v0, REGSZ*1(v0) // v0 = v0[TLS_SLOT_THREAD_ID ie 1] |
| 46 | sw $0, REGSZ*2+4(v0) // v0->cached_pid_ = 0 |
| 47 | |
| Dan Albert | 6a91887 | 2014-08-05 20:53:31 +0000 | [diff] [blame] | 48 | li a0, (CLONE_VM | CLONE_VFORK | SIGCHLD) |
| 49 | li a1, 0 |
| 50 | li a2, 0 |
| 51 | li a3, 0 |
| 52 | subu sp, 8 |
| 53 | sw $0, 16(sp) |
| 54 | li v0, __NR_clone |
| 55 | syscall |
| 56 | addu sp, 8 |
| 57 | bnez a3, 1f |
| 58 | move a0, v0 |
| 59 | |
| 60 | j ra |
| 61 | nop |
| 62 | 1: |
| Elliott Hughes | 011e111 | 2014-09-08 15:25:01 -0700 | [diff] [blame] | 63 | la t9, __set_errno_internal |
| Dan Albert | 6a91887 | 2014-08-05 20:53:31 +0000 | [diff] [blame] | 64 | j t9 |
| 65 | nop |
| 66 | END(vfork) |