Hello, I have written simple program given below in ARM assembly. When i run the program execution is not start from "ENTRY" directive but it execute sequencially from first line. Can anyone answer why is it so?
AREA RESET, CODE, READONLY MOV r0,#0xFF AREA ARMex, CODE, READONLY ; Name this block of code ARMex MOV r0, #10 MOV r1, #3 ADD r0, r0, r1 ; r0 = r0 + r1 stop ENTRY; MOV r0, #0x18 END ; Mark end of file
How do you think your processor will know that ENTRY is a good place to start?
Most processors thinks RESET is a good way to start, or to look for the start address (depending on type of processor).
Have you looked at the startup files that Keil install into normal C/C++ projects? See how they decide where to start?
I read the realview assembler guide, in that its written that ENTRY directive specify entry point for program to start execution. When i have start up file and source file in my project it start to execute start up file first but i want to start execution from source file. So i think ENTRY directives may work but execution sequence not change.