$.$syntax unified

$.$cpu cortex$-$m$3$

$.$equ SVC$\_$NUM, $006//006$ is the last $3$ digit of BITS ID

$.$section $.$text

$.$thumb

$.$global SVC$\_$Handler

SVC$\_$Handler

TST LR$,$ #$4$

ITE EQ

MRSEQ R$0,$ MSP

MRSNE R$0,$ PSP

MOV R$1,$ R$0//$ R$1$ holds the address of the SVC instruction

LDRB R$0,[$R$1,$ #$-2]//$ Load the SVC instruction

AND R$0,$ R$0,$ #$0$xFF $//$ Mask to extract the SVC number

CMP R$0,$ #SVC$\_$NUM

BNE not$\_$matched

$//$ SVC number matches BITS ID$,$ perform addition

LDR R$2,=84006//$ BITS ID last $5$ digits

LDR R$3,=84006//$ BITS ID last $5$ digits

ADD R$0,$ R$2,$ R$3//$ Perform addition

B svc$\_$done

not$\_$matched

$//$ SVC number doesn't match BITS ID$,$ perform subtraction

LDR R$2,=84006//$ BITS ID last $5$ digits

LDR R$3,=84006//$ BITS ID last $5$ digits

SUB R$0,$ R$2,$ R$3//$ Perform subtraction

svc$\_$done

$//$ Return from SVC handler, restoring original stack and returning to application

TST LR$,$ #$4$

ITE EQ

MRSEQ R$1,$ MSP

MRSNE R$1,$ PSP

LDMIA R$1!,\{$R$0-$R$3\}//$ Restore context

MOV LR$,$ R$3//$ Restore LR

BX LR $//$ Return to the application

I am getting $7$ errors on Keil V $5$ software, can you help me identify the error. Error message is Q$3.$s$(7)$: error: A$1355$U: A Label was found which was in no AREA

$".\backslash$Objects$\backslash$Q$3.$axf" $-7$ Error$($s$),0$ Warning$($s$).$

Target not created.

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