| The Android Open Source Project | 1dc9e47 | 2009-03-03 19:28:35 -0800 | [diff] [blame] | 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 | #include <sys/linux-syscalls.h> |
| 29 | |
| 30 | .text |
| 31 | .type __pthread_clone, #function |
| 32 | .global __pthread_clone |
| 33 | .align 4 |
| 34 | |
| 35 | __pthread_clone: |
| 36 | @ insert the args onto the new stack |
| 37 | str r0, [r1, #-4] |
| 38 | str r3, [r1, #-8] |
| 39 | |
| 40 | @ do the system call |
| 41 | @ get flags |
| 42 | |
| 43 | mov r0, r2 |
| 44 | |
| 45 | @ new sp is already in r1 |
| 46 | |
| 47 | #if __ARM_EABI__ |
| 48 | stmfd sp!, {r4, r7} |
| 49 | ldr r7, =__NR_clone |
| 50 | swi #0 |
| 51 | #else |
| 52 | swi #__NR_clone |
| 53 | #endif |
| 54 | |
| 55 | movs r0, r0 |
| 56 | #if __ARM_EABI__ |
| 57 | ldmnefd sp!, {r4, r7} |
| 58 | #endif |
| 59 | blt __error |
| 60 | bxne lr |
| 61 | |
| 62 | |
| 63 | @ pick the function arg and call address off the stack and jump |
| 64 | @ to the C __thread_entry function which does some setup and then |
| 65 | @ calls the thread's start function |
| 66 | |
| 67 | ldr r0, [sp, #-4] |
| 68 | ldr r1, [sp, #-8] |
| 69 | mov r2, sp @ __thread_entry needs the TLS pointer |
| 70 | b __thread_entry |
| 71 | |
| 72 | __error: |
| 73 | mov r0, #-1 |
| 74 | bx lr |