arch/arm/vfork.S

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

#include <klibc/asmmacros.h>
#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]
	BX(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:
	BX(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 <klibc/asmmacros.h>
8	#include <asm/unistd.h>
9
10	.type vfork,#function
11	.globl vfork
12	#ifndef __thumb__
13
14	.balign 4
15	vfork:
16	#ifdef __ARM_EABI__
17	mov r3, r7
18	mov r7, # __NR_vfork
19	swi 0
20	mov r7, r3
21	#else
22	swi # __NR_vfork
23	#endif
24	cmn r0, #4096
25	rsbcs r2, r0, #0
26	ldrcs r3, 1f
27	mvncs r0, #0
28	strcs r2, [r3]
29	BX(lr)
30
31	.balign 4
32	1:
33	.word errno
34
35	#else
36
37	.thumb_func
38	.balign 2
39	vfork:
40	mov r3, r7
41	mov r7, # __NR_vfork
42	swi 0
43	mov r7, r3
44	ldr r1, 2f
45	cmp r0, r1
46	bcc 1f
47	ldr r1, 3f
48	neg r2, r0
49	mov r0, #1
50	str r2, [r1]
51	neg r0, r0
52	1:
53	BX(lr)
54
55	.balign 4
56	2:
57	.word -4095
58	3:
59	.word errno
60
61	#endif