Correctly return EFAULT in copyin & copyout on a fault. This fixes NFS

when running FreeBSD on QEMU emulating a Gumstix board.

While here remove the use of a magic number in the not-XScale version.

Pointed out by:	kib
Reviewed by:	stas

sys/arm/arm/bcopyinout.S

@@ -39,6 +39,7 @@
 #include "assym.s"
 
 #include <machine/asm.h>
+#include <sys/errno.h>
 
 .L_arm_memcpy:
 	.word	_C_LABEL(_arm_memcpy)
@@ -310,7 +311,7 @@ ENTRY(copyin)
 	RET
 
 .Lcopyfault:
-	mov	r0, #14 /* EFAULT */
+	ldr	r0, =EFAULT
 	str	r5, [r4, #PCB_ONFAULT]
 	RESTORE_REGS
 

sys/arm/arm/bcopyinout_xscale.S

@@ -108,6 +108,7 @@ ENTRY(copyin)
 	ldmfd	sp!, {r10-r11, pc}
 
 .Lcopyin_fault:
+	ldr	r0, =EFAULT
 	str	r11, [r10, #PCB_ONFAULT]
 	cmp	r3, #0x00
 	ldmgtfd	sp!, {r4-r7}		/* r3 > 0 Restore r4-r7 */
@@ -559,6 +560,7 @@ ENTRY(copyout)
 	ldmfd	sp!, {r10-r11, pc}
 
 .Lcopyout_fault:
+	ldr	r0, =EFAULT
 	str	r11, [r10, #PCB_ONFAULT]
 	cmp	r3, #0x00
 	ldmgtfd	sp!, {r4-r7}		/* r3 > 0 Restore r4-r7 */