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	niro	532	/*
2			* arch/arm/vfork.S
3			*
4			* vfork - nasty system call which must not use the stack.
5			*/
6
7	niro	1297	#include <klibc/asmmacros.h>
8	niro	532	#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	niro	1297	BX(lr)
30	niro	532
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	niro	1297	BX(lr)
54	niro	532
55			.balign 4
56			2:
57			.word -4095
58			3:
59			.word errno
60
61			#endif