Raghu Gandham | 405b802 | 2012-07-25 18:16:42 -0700 | [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 | */ |
Elliott Hughes | 56d161b | 2013-03-21 22:52:25 -0700 | [diff] [blame] | 28 | |
| 29 | #include <asm/unistd.h> |
Raghu Gandham | 405b802 | 2012-07-25 18:16:42 -0700 | [diff] [blame] | 30 | #include <linux/errno.h> |
Elliott Hughes | 56d161b | 2013-03-21 22:52:25 -0700 | [diff] [blame] | 31 | #include <linux/sched.h> |
Elliott Hughes | 40eabe2 | 2013-02-14 18:59:37 -0800 | [diff] [blame] | 32 | |
Elliott Hughes | 70b24b1 | 2013-11-15 11:51:07 -0800 | [diff] [blame] | 33 | // pid_t __bionic_clone(int flags, void* child_stack, pid_t* parent_tid, void* tls, pid_t* child_tid, int (*fn)(void*), void* arg); |
Raghu Gandham | 405b802 | 2012-07-25 18:16:42 -0700 | [diff] [blame] | 34 | .text |
| 35 | .type __bionic_clone, @function |
| 36 | .global __bionic_clone |
| 37 | .align 4 |
| 38 | .ent __bionic_clone |
| 39 | __bionic_clone: |
| 40 | .set noreorder |
| 41 | .cpload $t9 |
| 42 | .set reorder |
| 43 | |
| 44 | # set up child stack |
| 45 | subu $a1,16 |
| 46 | lw $t0,20($sp) # fn |
| 47 | lw $t1,24($sp) # arg |
| 48 | sw $t0,0($a1) # fn |
| 49 | sw $t1,4($a1) # arg |
| 50 | |
| 51 | # remainder of arguments are correct for clone system call |
| 52 | li $v0,__NR_clone |
| 53 | syscall |
| 54 | |
| 55 | bnez $a3,.L__error_bc |
| 56 | |
| 57 | beqz $v0,.L__thread_start_bc |
Elliott Hughes | 40eabe2 | 2013-02-14 18:59:37 -0800 | [diff] [blame] | 58 | |
Raghu Gandham | 405b802 | 2012-07-25 18:16:42 -0700 | [diff] [blame] | 59 | j $ra |
| 60 | |
| 61 | .L__thread_start_bc: |
| 62 | lw $a0,0($sp) # fn |
| 63 | lw $a1,4($sp) # arg |
| 64 | |
| 65 | # void __bionic_clone_entry(int (*func)(void*), void *arg) |
| 66 | la $t9,__bionic_clone_entry |
| 67 | j $t9 |
| 68 | |
| 69 | .L__error_bc: |
| 70 | move $a0,$v0 |
| 71 | la $t9,__set_errno |
| 72 | j $t9 |
| 73 | |
| 74 | .end __bionic_clone |