|
;Copy string from table1 to table2
AREA blkCpy,CODE,READONLY
SWI_ANGEL EQU 0x123456 ;SWI number for Angel semihosting
MACRO
$l Exit ;Angel SWI call to terminate execution
$l MOV r0, #0x18 ;Angel SWIreason_ReportException(0x18)
LDR r1, =0x20026 ;report ADP_Stopped_ApplicationExit
SWI SWI_ANGEL ;ARM semihosting SWI
MEND
MACRO
$l WriteC ;Angel SWI call to output char in [r1]
$l MOV r0, #0x3 ;select Angel SYS_WRITEC function
SWI SWI_ANGEL
MEND
ENTRY ;code entry point
ADR r1, TABLE1 ;r1->TABLE1
ADR r2, TABLE2 ;r2->TABLE2
ADR r3, T1END ;r3->T1END
LOOP1 LDR r4, [r1], #4 ;GET TABLE1 1st WORD
STR r4, [r2], #4 ;COPY INTO TABLE2
CMP r1, r3 ;FINISHED?
BLT LOOP1 ;IF NOT, DO MORE
ADR r1, TABLE2-1 ;r1->TABLE2
MOV r0, #0x3
LOOP2 LDRB r4, [r1,#1]! ;get next byte
CMP r4, #0 ;CHECK FOR TEXT END
SWINE SWI_ANGEL ;IF NOT END, PRINT...
BNE LOOP2 ;.. AND LOOP BACK
Exit ;FINISH
ALIGN
TABLE1 = "This is the right string!", &0a, &0d, 0
T1END
TABLE2 = "This is the wrong string!", 0
END
|
