1/*-
2 * Copyright (c) 2000 Peter Wemm <peter@FreeBSD.org>
3 * Copyright (c) 2003 Alan L. Cox <alc@cs.rice.edu>
4 * All rights reserved.
5 *
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
8 * are met:
9 * 1. Redistributions of source code must retain the above copyright
10 * notice, this list of conditions and the following disclaimer.
11 * 2. Redistributions in binary form must reproduce the above copyright
12 * notice, this list of conditions and the following disclaimer in the
13 * documentation and/or other materials provided with the distribution.
14 *
15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
16 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
17 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
18 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
19 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
20 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
21 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
22 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
23 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
24 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
25 * SUCH DAMAGE.
26 */
27
28#include <machine/asm.h>
| 1/*-
2 * Copyright (c) 2000 Peter Wemm <peter@FreeBSD.org>
3 * Copyright (c) 2003 Alan L. Cox <alc@cs.rice.edu>
4 * All rights reserved.
5 *
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
8 * are met:
9 * 1. Redistributions of source code must retain the above copyright
10 * notice, this list of conditions and the following disclaimer.
11 * 2. Redistributions in binary form must reproduce the above copyright
12 * notice, this list of conditions and the following disclaimer in the
13 * documentation and/or other materials provided with the distribution.
14 *
15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
16 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
17 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
18 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
19 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
20 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
21 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
22 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
23 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
24 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
25 * SUCH DAMAGE.
26 */
27
28#include <machine/asm.h>
|
29__FBSDID("$FreeBSD: head/lib/libc/amd64/gen/rfork_thread.S 184547 2008-11-02 01:10:54Z peter $");
| 29__FBSDID("$FreeBSD: head/lib/libc/amd64/gen/rfork_thread.S 217106 2011-01-07 16:08:40Z kib $");
|
30
31/*
32 * With thanks to John Dyson for the original version of this.
33 */
34
35#include <SYS.h>
36
37/*
38 * %edi %rsi %rdx %rcx
39 * rfork_thread(flags, stack_addr, start_fnc, start_arg);
40 *
41 * flags: Flags to rfork system call. See rfork(2).
42 * stack_addr: Top of stack for thread.
43 * start_fnc: Address of thread function to call in child.
44 * start_arg: Argument to pass to the thread function in child.
45 */
46
47ENTRY(rfork_thread)
48 pushq %rbx
49 pushq %r12
50 movq %rdx, %rbx
51 movq %rcx, %r12
52
53 /*
54 * Prepare and execute the thread creation syscall
55 */
56 movq $SYS_rfork, %rax
57 KERNCALL
58 jb 2f
59
60 /*
61 * Check to see if we are in the parent or child
62 */
63 cmpl $0, %edx
64 jnz 1f
65 popq %r12
66 popq %rbx
67 ret
68
69 /*
70 * If we are in the child (new thread), then
71 * set-up the call to the internal subroutine. If it
72 * returns, then call __exit.
73 */
741:
75 movq %rsi, %rsp
76 movq %r12, %rdi
77 call *%rbx
78 movl %eax, %edi
79
80 /*
81 * Exit system call
82 */
83#ifdef SYS_exit
84 movq $SYS_exit, %rax
85#else
86 movq $SYS_sys_exit, %rax
87#endif
88 KERNCALL
89
90 /*
91 * Branch here if the thread creation fails:
92 */
932:
94 popq %r12
95 popq %rbx
96#ifdef PIC
97 movq PIC_GOT(HIDENAME(cerror)), %rdx
98 jmp *%rdx
99#else
100 jmp HIDENAME(cerror)
101#endif
102END(rfork_thread)
| 30
31/*
32 * With thanks to John Dyson for the original version of this.
33 */
34
35#include <SYS.h>
36
37/*
38 * %edi %rsi %rdx %rcx
39 * rfork_thread(flags, stack_addr, start_fnc, start_arg);
40 *
41 * flags: Flags to rfork system call. See rfork(2).
42 * stack_addr: Top of stack for thread.
43 * start_fnc: Address of thread function to call in child.
44 * start_arg: Argument to pass to the thread function in child.
45 */
46
47ENTRY(rfork_thread)
48 pushq %rbx
49 pushq %r12
50 movq %rdx, %rbx
51 movq %rcx, %r12
52
53 /*
54 * Prepare and execute the thread creation syscall
55 */
56 movq $SYS_rfork, %rax
57 KERNCALL
58 jb 2f
59
60 /*
61 * Check to see if we are in the parent or child
62 */
63 cmpl $0, %edx
64 jnz 1f
65 popq %r12
66 popq %rbx
67 ret
68
69 /*
70 * If we are in the child (new thread), then
71 * set-up the call to the internal subroutine. If it
72 * returns, then call __exit.
73 */
741:
75 movq %rsi, %rsp
76 movq %r12, %rdi
77 call *%rbx
78 movl %eax, %edi
79
80 /*
81 * Exit system call
82 */
83#ifdef SYS_exit
84 movq $SYS_exit, %rax
85#else
86 movq $SYS_sys_exit, %rax
87#endif
88 KERNCALL
89
90 /*
91 * Branch here if the thread creation fails:
92 */
932:
94 popq %r12
95 popq %rbx
96#ifdef PIC
97 movq PIC_GOT(HIDENAME(cerror)), %rdx
98 jmp *%rdx
99#else
100 jmp HIDENAME(cerror)
101#endif
102END(rfork_thread)
|
| 103
104 .section .note.GNU-stack,"",%progbits
|
| |