handy_simics_commands

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- Handy Simics commands

Handy Simics commands

pregs - print values of all registers
break -x address = 0×4000 length = 100 - break if an instruction at address 0×4000 is executed
break-exception name = Illegal_Instruction - break on an Illegal Instruction trap
si - execute the first following instruction
c 10 - execute 10 following instructions

Tracing

This code will execute 10 instructions, printing information about each of them.

new-tracer
trace0.start
c 10
trace0.stop

Reading and writing memory

phys_mem.get address = 0×4000 size = 1 - prints the contents of the byte at location 0×4000
phys_mem.set address = 0×4000 size = 1 value = 0x7A - sets the contents of the byte at location 0×4000 to 0x7a
phys_mem.x address = 0×4000 size = 10 - prints the contents of the 10 consecutive bytes starting at location 0×4000
disassemble address = 0×4000 count = 10 - disassembles and prints the contents of the 10 consecutive instructions starting at location 0×4000

Investigating MMU

mmu0.regs - prints the values of all the registers of MMU on CPU0