ARMv7.HeyThere

ARMv7 assembly code that outputs the text "Hey there" to standard output (the screen)

Language information

This program has been written in ARMv7 assembly language as on the Raspberry Pi. These can be purchased online for around £10-30. The starter set can be purchased for approximately £50.

How to run

Method 1

1. Download or clone this GitHub repository
2. (If downloaded) Extract the zip archive
3. Compile the .s file

as –o model.o model.s

4. Link the .o file(s)

• For a single .o file

ld –o model model.o

• For multiple files

ld –o model model.o myotherfile.o

5. Run the program

./model

6. Display Register 0

echo $?

Method 2

1. Download or clone this GitHub repository
2. (If downloaded) Extract the zip archive
3. Run the program

./model

4. Display Register 0

echo $?

Debug the program

1. Compile the .s file

as –g –o model.o model.s

2. Link the .o files (as above)

ld –o model model.o

3. Debug the program with

gdb model

Noteworthy commands

• List the next 10 lines: l
• Set breakpoint: b [line number]
• Run the program: r
• Continue to the next breakpoint: c
• Output register values: i r
• Run next line only: s
• Help: h
• Quit: q