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 */
29 #include <private/bionic_asm.h>
30 #include <linux/errno.h>
31 #include <linux/sched.h>
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);
34 ENTRY(__bionic_clone)
35 .set noreorder
36 .cpload t9
37 .set reorder
39 # set up child stack
40 subu a1,16
41 lw t0,20(sp) # fn
42 lw t1,24(sp) # arg
43 sw t0,0(a1) # fn
44 sw t1,4(a1) # arg
46 # remainder of arguments are correct for clone system call
47 li v0,__NR_clone
48 syscall
50 bnez a3,.L__error_bc
52 beqz v0,.L__thread_start_bc
54 j ra
56 .L__thread_start_bc:
57 lw a0,0(sp) # fn
58 lw a1,4(sp) # arg
60 # void __bionic_clone_entry(int (*func)(void*), void *arg)
61 la t9,__bionic_clone_entry
62 j t9
64 .L__error_bc:
65 move a0,v0
66 la t9,__set_errno
67 j t9
68 END(__bionic_clone)