legv8debug

A debugging emulator for legv8 assembly.

Supported commands

• q: quit the debugger
• r [X]: run the program until a breakpoint is hit or the program terminates. If X is provided X breakpoints are skipped which is useful for skipping X loop iterations.
• b X: set a breakpoint at line X.
• s [X]: run X instructions. If no X is provided defaults to 1.
• d: prints registers and memory values in a format similar to hexdump, little-endian
• p X: prints the contents of register X in little-endian hex and decimal.

Currently implemented instructions

NOTE: these aren't very well tested and may be prone to bugs.

• PRNT, PRNL, DUMP - treated as nops.
• ADDI
• ADD
• SUB
• SUBI
• SUBS
• CBZ
• CBNZ
• B
• B.EQ
• B.GT
• B.GE
• B.LT
• B.LE
• BL
• BR
• STUR
• LDUR
• LSL
• LSR
• ADDIS
• ADDS
• SUBIS
• ORR
• ORRI
• EOR
• EORI
• AND
• ANDS
• ANDI
• ANDIS
• MUL