| Serban Constantinescu | e210488 | 2013-09-26 11:37:10 +0100 | [diff] [blame^] | 1 | /* |
| 2 | * Copyright (C) 2013 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 <asm/unistd.h> |
| 30 | #include <linux/err.h> |
| 31 | #include <machine/asm.h> |
| 32 | |
| 33 | ENTRY(vfork) |
| 34 | mov x0, #0x4111 /* CLONE_VM | CLONE_VFORK | SIGCHLD */ |
| 35 | mov x1, xzr |
| 36 | mov x2, xzr |
| 37 | mov x3, xzr |
| 38 | mov x4, xzr |
| 39 | |
| 40 | str x8, [sp, #-16]! |
| 41 | mov x8, __NR_clone |
| 42 | |
| 43 | svc #0 |
| 44 | ldr x8, [sp], #16 |
| 45 | |
| 46 | /* check if syscall returned successfully */ |
| 47 | cmn x0, #(MAX_ERRNO + 1) |
| 48 | cneg x0, x0, hi |
| 49 | b.hi __set_errno |
| 50 | |
| 51 | ret |
| 52 | END(vfork) |