Crate armv4t_emu

An emulator for the ARMv4T instruction set.

Example

use armv4t_emu::{reg, Cpu, ExampleMem, Mode, Memory};

let prog = &[
    0x06, 0x00, 0xa0, 0xe3, //    mov r0, #6
    0x01, 0x10, 0xa0, 0xe3, //    mov r1, #1
    0x01, 0x10, 0x81, 0xe0, // l: add r1, r1, r1
    0x01, 0x00, 0x50, 0xe2, //    subs r0, #1
    0xfc, 0xff, 0xff, 0x1a, //    bne l
    0x01, 0x6c, 0xa0, 0xe3, //    mov r6, #0x100
    0x00, 0x10, 0x86, 0xe5, //    str r1, [r6]
    0xf7, 0xf0, 0xde, 0xad  // ; trigger undefined instr exception
];

let mut mem = ExampleMem::new_with_data(prog);
let mut cpu = Cpu::new();
cpu.reg_set(Mode::User, reg::PC, 0x00);
cpu.reg_set(Mode::User, reg::CPSR, 0x10);

while cpu.step(&mut mem) {}

assert_eq!(64, mem.r32(0x100));

Modules

• reg
  Register identifiers.

Structs

• Cpu
  An emulated CPU which implements the ARMv4T instruction set.
• ExampleMem
  Example memory device backed by a BTreeMap<u32, u8>.

Enums

• Exception
  An ARMv4T processor exception.
• Mode
  An ARMv4T processor mode.

Traits

• Memory
  Encodes how the Cpu accesses external memory / memory-mapped devices.