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	/*
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