arch/arm/vfork.S

/*
 * arch/arm/vfork.S
 *
 * vfork - nasty system call which must not use the stack.
 */

#include <asm/unistd.h>

	.type	vfork,#function
	.globl	vfork
#ifndef __thumb__

	.balign	4
vfork:
#ifdef	__ARM_EABI__
	mov	r3, r7
	mov	r7, # __NR_vfork
	swi	0
	mov	r7, r3
#else
	swi	# __NR_vfork
#endif
        cmn     r0, #4096
        rsbcs	r2, r0, #0
        ldrcs	r3, 1f
        mvncs	r0, #0
        strcs	r2, [r3]
	mov	pc, lr

	.balign 4
1:
	.word	errno

#else

	.thumb_func
	.balign	2
vfork:
	mov	r3, r7
	mov	r7, # __NR_vfork
	swi	0
	mov	r7, r3
	ldr	r1, 2f
	cmp	r0, r1
	bcc	1f
	ldr	r1, 3f
	neg	r2, r0
	mov	r0, #1
	str	r2, [r1]
	neg	r0, r0
1:
	mov	pc, lr

	.balign	4
2:
	.word	-4095
3:
	.word	errno

#endif
1	niro	532	/*
2			* arch/arm/vfork.S
3			*
4			* vfork - nasty system call which must not use the stack.
5			*/
6
7			#include <asm/unistd.h>
8
9			.type vfork,#function
10			.globl vfork
11			#ifndef __thumb__
12
13			.balign 4
14			vfork:
15			#ifdef __ARM_EABI__
16			mov r3, r7
17			mov r7, # __NR_vfork
18			swi 0
19			mov r7, r3
20			#else
21			swi # __NR_vfork
22			#endif
23			cmn r0, #4096
24			rsbcs r2, r0, #0
25			ldrcs r3, 1f
26			mvncs r0, #0
27			strcs r2, [r3]
28			mov pc, lr
29
30			.balign 4
31			1:
32			.word errno
33
34			#else
35
36			.thumb_func
37			.balign 2
38			vfork:
39			mov r3, r7
40			mov r7, # __NR_vfork
41			swi 0
42			mov r7, r3
43			ldr r1, 2f
44			cmp r0, r1
45			bcc 1f
46			ldr r1, 3f
47			neg r2, r0
48			mov r0, #1
49			str r2, [r1]
50			neg r0, r0
51			1:
52			mov pc, lr
53
54			.balign 4
55			2:
56			.word -4095
57			3:
58			.word errno
59
60			#endif