I am using Keil Uvision 4 and try to run following program, but does not read data from Data area correctly.
AREA StrCopy, CODE, READONLY
ENTRY
Start LDR r1, =srcstr
LDR r0, =dststr
BL strcopy
Stop MOV r0, #0x18
LDR r1, =0x20026
SVC #0x123456
strcopy
LDRB r2, [r1],#1
STRB r2, [r0],#1
CMP r2, #0
BNE strcopy
AREA Strings, DATA
srcstr DCB "AAAAAAAAAAAAAAAAAAAA",0
dststr DCB " 0000000000000",0
END