Execute machine code in hex form.
This repo includes both a Rust package and a utility called jitrun.
It was inspired by this post: Hello, JIT World: The Joy of Simple JITs.
This is a port of jit from Go to Rust.
Return the number 42:
cargo run -p jitrun -- examples/42.mc
Contents of 42.mc:
``` // This program moves 42 into eax and returns
b8 2a 00 00 00 // mov 0x2a000000 into the eax register. b8 is the "mov eax" part. 2a is 42. c3 // return to the caller (the return value is held in eax) ```
Calculate the square root of 1024:
cargo run -p jitrun -- examples/sqrt.mc
Contents of sqrt.mc:
``` // This program takes the square root of 1024 and returns the answer (in eax), which is 32
b8 00 04 00 00 // mov 1024 (0x0400) into eax (0x00 comes first and then 0x04, because it is little-endian) f3 0f 2a c0 // mov eax into the xmm0 register f3 0f 51 c0 // take the square root of the xmm0 register and place it into xmm0 f3 0f 2c c0 // move xmm0 back into eax c3 // return to the caller (the return value is held in eax)
```