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/*
* arch/arm/syscall.S
*
* System call common handling
*/
.type __syscall_common,#function
.globl __syscall_common
#ifndef __thumb__
/* ARM version - this is executed after the swi, unless
we are compiled in EABI mode */
.balign 4
__syscall_common:
#ifdef __ARM_EABI__
ldr r4, [sp,#16]
ldr r5, [sp,#20]
ldr r7, [lr]
swi 0
#endif
cmn r0, #4096
rsbcs r2, r0, #0
ldrcs r3, 1f
mvncs r0, #0
strcs r2, [r3]
#ifdef __ARM_EABI__
ldmfd sp!,{r4,r5,r7,pc}
#else
ldmfd sp!,{r4,r5,pc}
#endif
.balign 4
1:
.word errno
#else
/* Thumb version - must still load r4 and r5 and run swi */
.thumb_func
.balign 2
__syscall_common:
mov r7, lr
ldr r4, [sp,#16]
sub r7, #1 /* Remove the Thumb bit */
ldr r5, [sp,#20]
ldrh r7, [r7]
swi 0
ldr r1, 2f
cmp r0, r1
bcc 1f
ldr r1, 3f
neg r2, r0
mov r0, #1
str r2, [r1]
neg r0, r0
1:
pop {r4,r5,r7,pc}
.balign 4
2:
.word -4095
3:
.word errno
#endif
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