$.$syntax unified

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

AREA $|.$text$|,$ CODE, READONLY ; Define an area named $\text{'}.$text'

SVC$\_$NUM EQU $006$ ; Define SVC$\_$NUM as $006$

; Define the SVC$\_$Handler as a global symbol

THUMB

EXPORT SVC$\_$Handler

SVC$\_$Handler

TST lr$,$ #$4$ ; Test whether LR indicates MSP or PSP

ITE EQ

MRSEQ r$0,$ msp ; If EQ$,$ set r$0$ to MSP

MRSNE r$0,$ psp ; If not EQ$,$ set r$0$ to PSP

MOV r$1,$ r$0$ ; Copy the stack pointer to r$1$

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 ; Compare with SVC$\_$NUM

BNE not$\_$matched ; Branch if not equal to SVC$\_$NUM

; SVC number matches BITS ID$,$ perform addition

LDR r$2,=84006$ ; Load BITS ID last $5$ digits

LDR r$3,=84006$ ; Load BITS ID last $5$ digits

ADD r$0,$ r$2,$ r$3$ ; Perform addition

B svc$\_$done ; Branch to svc$\_$done

not$\_$matched

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

LDR r$2,=84006$ ; Load BITS ID last $5$ digits

LDR r$3,=84006$ ; Load 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$,$ #$4$ ; Test whether LR indicates MSP or PSP

ITE EQ

MRSEQ r$1,$ msp ; If EQ$,$ set r$1$ to MSP

MRSNE r$1,$ psp ; If not EQ$,$ set r$1$ to PSP

LDMIA r$1!,\{$r$0-$r$3\}$ ; Restore context

MOV lr$,$ r$3$ ; Restore LR

BX lr ; Return to the application

Above code in ARM is throwing $4$ errors as below, Unable to rectify, I am using ARM Architecture and LPC$2378$ from nxp on Keil version. Please help resolve the errors so tha i can run the program

Error Message as below

$***$ Using Compiler $\text{'}$V$5\mathrm{.}06$ update $6($build $750)\text{'},$ folder: $\text{'}$C:$\backslash$Keil$\_$v$5\backslash$ARM$\backslash$ARMCC$\backslash$Bin$\text{'}$

Rebuild target 'Target $1\text{'}$

assembling Q$3.$s$...$

Q$3.$s$(1)$: error: A$1137$E: Unexpected characters at end of line

Q$3.$s$(2)$: error: A$1137$E: Unexpected characters at end of line

Q$3.$s$(4)$: error: A$1163$E: Unknown opcode $|.$text$|,,$ expecting opcode or Macro

Q$3.$s$(9)$: error: A$1355$U: A Label was found which was in no AREA

$".\backslash$Objects$\backslash$Q$3.$axf" $-4$ Error$($s$),0$ Warning$($s$).$

Target not created.

Build Time Elapsed: $00$:$00$:$00$