Use LLVM to compile different assembly languages to binary (Rust API).
It (ab)uses LLVM architecture to insert a BinaryStreamer during the ASM parsing run and output the binary code to a buffer instead of an object file. It supports inline and external labels/relocations too.
It depends on LLVM >= 3.7, zlib and libedit.
In Cargo.toml write:
[dependencies.llvm_assemble]
git = "https://github.com/snf/llvm_assemble.git"
Basic:
use llvm_assemble::assembler::{Arch, assemble};
fn main() {
assert_eq!(assemble(Arch::X86, "int3").unwrap(),
[0xcc]);
assert_eq!(assemble(Arch::X86_64, "vandnps ymm0,ymm1,ymm2").unwrap(),
[0xC5, 0xF4, 0x55, 0xC2]);
assert_eq!(assemble(Arch::X86_64, "je label0; nop; label0:").unwrap(),
[0x74, 0x01, 0x90]);
assert_eq!(assemble(Arch::Arm, "ldrb r3, [r1], #1").unwrap(),
[0x01, 0x30, 0xd1, 0xe4]);
assert_eq!(assemble(Arch::Arm, "pop {pc}").unwrap(),
[0x4, 0xf0, 0x9d, 0xe4]);
assert_eq!(assemble(Arch::Arm64, "mul w0, w1, w0").unwrap(),
[0x20, 0x7c, 0x0, 0x1b]);
assert_eq!(assemble(Arch::PPC32, "blr").unwrap(),
[0x4e, 0x80, 0x0, 0x20]);
}With external relocations:
use llvm_assemble::assembler::{Arch, Reloc, assemble2};
fn main() {
let addr = 0x1000;
let label0 = Reloc::new("label0", 0x1003);
let bytes = assemble2(Arch::X86_64, "jmp label0", addr, &[label0]).unwrap();
assert_eq!(bytes, [0xeb, 0x01]);
}It works but is not really tested in architectures other than x86, x86_64 and ARM.