1/*-
2 * Copyright (c) 2000 Peter Wemm <peter@FreeBSD.org>
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 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
13 *
14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
24 * SUCH DAMAGE.
25 *
| 1/*-
2 * Copyright (c) 2000 Peter Wemm <peter@FreeBSD.org>
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 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
13 *
14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
24 * SUCH DAMAGE.
25 *
|
26 * $FreeBSD: head/lib/libc/i386/gen/rfork_thread.S 64003 2000-07-29 11:34:01Z peter $
| 26 * $FreeBSD: head/lib/libc/i386/gen/rfork_thread.S 87006 2001-11-27 20:51:26Z jhb $
|
27 */
28
29/*
30 * With thanks to John Dyson for the original version of this.
31 */
32
33#include <SYS.h>
34
35/*
36 * 8 12 16 20
37 * rfork_thread(flags, stack_addr, start_fnc, start_arg);
38 *
39 * flags: Flags to rfork system call. See rfork(2).
40 * stack_addr: Top of stack for thread.
41 * start_fnc: Address of thread function to call in child.
42 * start_arg: Argument to pass to the thread function in child.
43 */
44
45ENTRY(rfork_thread)
46 pushl %ebp
47 movl %esp, %ebp
48 pushl %esi
49
50 /*
51 * Push thread info onto the new thread's stack
52 */
53 movl 12(%ebp), %esi # get stack addr
54
55 subl $4, %esi
56 movl 20(%ebp), %eax # get start argument
57 movl %eax, (%esi)
58
59 subl $4, %esi
60 movl 16(%ebp), %eax # get start thread address
61 movl %eax, (%esi)
62
63 /*
64 * Prepare and execute the thread creation syscall
65 */
66 pushl 8(%ebp)
67 pushl $0
| 27 */
28
29/*
30 * With thanks to John Dyson for the original version of this.
31 */
32
33#include <SYS.h>
34
35/*
36 * 8 12 16 20
37 * rfork_thread(flags, stack_addr, start_fnc, start_arg);
38 *
39 * flags: Flags to rfork system call. See rfork(2).
40 * stack_addr: Top of stack for thread.
41 * start_fnc: Address of thread function to call in child.
42 * start_arg: Argument to pass to the thread function in child.
43 */
44
45ENTRY(rfork_thread)
46 pushl %ebp
47 movl %esp, %ebp
48 pushl %esi
49
50 /*
51 * Push thread info onto the new thread's stack
52 */
53 movl 12(%ebp), %esi # get stack addr
54
55 subl $4, %esi
56 movl 20(%ebp), %eax # get start argument
57 movl %eax, (%esi)
58
59 subl $4, %esi
60 movl 16(%ebp), %eax # get start thread address
61 movl %eax, (%esi)
62
63 /*
64 * Prepare and execute the thread creation syscall
65 */
66 pushl 8(%ebp)
67 pushl $0
|
68 leal SYS_rfork, %eax
| 68 movl $SYS_rfork, %eax
|
69 KERNCALL
70 jb 2f
71
72 /*
73 * Check to see if we are in the parent or child
74 */
75 cmpl $0, %edx
76 jnz 1f
77 addl $8, %esp
78 popl %esi
79 movl %ebp, %esp
80 popl %ebp
81 ret
82 .p2align 2
83
84 /*
85 * If we are in the child (new thread), then
86 * set-up the call to the internal subroutine. If it
87 * returns, then call __exit.
88 */
891:
90 movl %esi,%esp
91 popl %eax
92 call *%eax
93 addl $4, %esp
94
95 /*
96 * Exit system call
97 */
98 pushl %eax
99 pushl $0
100#ifdef SYS_exit
| 69 KERNCALL
70 jb 2f
71
72 /*
73 * Check to see if we are in the parent or child
74 */
75 cmpl $0, %edx
76 jnz 1f
77 addl $8, %esp
78 popl %esi
79 movl %ebp, %esp
80 popl %ebp
81 ret
82 .p2align 2
83
84 /*
85 * If we are in the child (new thread), then
86 * set-up the call to the internal subroutine. If it
87 * returns, then call __exit.
88 */
891:
90 movl %esi,%esp
91 popl %eax
92 call *%eax
93 addl $4, %esp
94
95 /*
96 * Exit system call
97 */
98 pushl %eax
99 pushl $0
100#ifdef SYS_exit
|
101 leal SYS_exit, %eax
| 101 movl $SYS_exit, %eax
|
102#else
| 102#else
|
103 leal SYS_sys_exit, %eax
| 103 movl $SYS_sys_exit, %eax
|
104#endif
105 KERNCALL
106
107 /*
108 * Branch here if the thread creation fails:
109 */
1102:
111 PIC_PROLOGUE
112 jmp PIC_PLT(HIDENAME(cerror))
| 104#endif
105 KERNCALL
106
107 /*
108 * Branch here if the thread creation fails:
109 */
1102:
111 PIC_PROLOGUE
112 jmp PIC_PLT(HIDENAME(cerror))
|