1/*
2 * Copyright (C) 2009 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.globl  __pthread_clone
33.align  4
34
35__pthread_clone:
36    /* insert the args onto the new stack */
37    mov     r5, r0
38    mov.l   r4, @-r0    /* func */
39    mov.l   r7, @-r0    /* arg */
40
41    /* do the system call */
42    mov     r6, r4      /* Set clone_flags. new sp is ready in r5. */
43    mov.l   0f, r3
44    trapa   #(4 + 0x10)
45
46    /* check error */
47    cmp/pz  r0
48    bf      __error
49
50    /* check if parent or child */
51    cmp/pl  r0
52    bt      __return
53
54    /* prepare args for __thread_entry */
55    mov     #8, r1
56    sub     r1, r15     /* -8 */
57    mov.l   @r15+, r5   /* +4 */ /* arg */
58    mov.l   @r15+, r4   /* +4 */ /* func */
59    mov     r15, r6              /* tls */
60
61    /* jump to __thread_entry */
62    mov.l   1f, r0
63    jmp @r0
64    nop
65
66__error:
67    mov     #-1, r0
68__return:
69    rts
70    nop
71
72    .align 2
730:  .long   __NR_clone
741:  .long   __thread_entry
75
76/* XXX: TODO: Add __bionic_clone here
77 *            See bionic/bionic_clone.c and arch-arm/bionic/clone.S
78 *            for more details...
79 */