1/*-
2 * Copyright (c) 2003 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
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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
27#include <machine/asm.h>
28__FBSDID("$FreeBSD: head/lib/libc/i386/sys/getcontext.S 240152 2012-09-05 21:41:05Z jilles $");
29
30#include <SYS.h>
31
32/*
33 * This has to be magic to handle the multiple returns.
34 * Otherwise, the setcontext() syscall will return here and we'll
35 * pop off the return address and go to the *setcontext* call.
36 */
37 .weak _getcontext
38 .set _getcontext,__sys_getcontext
39 .weak getcontext
40 .set getcontext,__sys_getcontext
41ENTRY(__sys_getcontext)
42 movl (%esp),%ecx /* save getcontext return address */
43 mov $SYS_getcontext,%eax
44 KERNCALL
45 jb HIDENAME(cerror)
46 addl $4,%esp /* remove stale (setcontext) return address */
47 jmp *%ecx /* restore return address */
48END(__sys_getcontext)
49
50 .section .note.GNU-stack,"",%progbits
2 * Copyright (c) 2003 Peter Wemm <peter@FreeBSD.org>
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
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20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
24 * SUCH DAMAGE.
25 */
26
27#include <machine/asm.h>
28__FBSDID("$FreeBSD: head/lib/libc/i386/sys/getcontext.S 240152 2012-09-05 21:41:05Z jilles $");
29
30#include <SYS.h>
31
32/*
33 * This has to be magic to handle the multiple returns.
34 * Otherwise, the setcontext() syscall will return here and we'll
35 * pop off the return address and go to the *setcontext* call.
36 */
37 .weak _getcontext
38 .set _getcontext,__sys_getcontext
39 .weak getcontext
40 .set getcontext,__sys_getcontext
41ENTRY(__sys_getcontext)
42 movl (%esp),%ecx /* save getcontext return address */
43 mov $SYS_getcontext,%eax
44 KERNCALL
45 jb HIDENAME(cerror)
46 addl $4,%esp /* remove stale (setcontext) return address */
47 jmp *%ecx /* restore return address */
48END(__sys_getcontext)
49
50 .section .note.GNU-stack,"",%progbits