Crate capstone

Expand description

Bindings to the capstone library disassembly framework.

This crate is a wrapper around the Capstone disassembly library, a “lightweight multi-platform, multi-architecture disassembly framework.”

The Capstone struct is the main interface to the library.

extern crate capstone;

use capstone::prelude::*;

const X86_CODE: &'static [u8] = b"\x55\x48\x8b\x05\xb8\x13\x00\x00\xe9\x14\x9e\x08\x00\x45\x31\xe4";

/// Print register names
fn reg_names(cs: &Capstone, regs: &[RegId]) -> String {
    let names: Vec<String> = regs.iter().map(|&x| cs.reg_name(x).unwrap()).collect();
    names.join(", ")
}

/// Print instruction group names
fn group_names(cs: &Capstone, regs: &[InsnGroupId]) -> String {
    let names: Vec<String> = regs.iter().map(|&x| cs.group_name(x).unwrap()).collect();
    names.join(", ")
}

fn main() {
    let cs = Capstone::new()
        .x86()
        .mode(arch::x86::ArchMode::Mode64)
        .syntax(arch::x86::ArchSyntax::Att)
        .detail(true)
        .build()
        .expect("Failed to create Capstone object");

    let insns = cs.disasm_all(X86_CODE, 0x1000)
        .expect("Failed to disassemble");
    println!("Found {} instructions", insns.len());
    for i in insns.as_ref() {
        println!();
        println!("{}", i);

        let detail: InsnDetail = cs.insn_detail(&i).expect("Failed to get insn detail");
        let arch_detail: ArchDetail = detail.arch_detail();
        let ops = arch_detail.operands();

        let output: &[(&str, String)] = &[
            ("insn id:", format!("{:?}", i.id().0)),
            ("bytes:", format!("{:?}", i.bytes())),
            ("read regs:", reg_names(&cs, detail.regs_read())),
            ("write regs:", reg_names(&cs, detail.regs_write())),
            ("insn groups:", group_names(&cs, detail.groups())),
        ];

        for &(ref name, ref message) in output.iter() {
            println!("{:4}{:12} {}", "", name, message);
        }

        println!("{:4}operands: {}", "", ops.len());
        for op in ops {
            println!("{:8}{:?}", "", op);
        }
    }
}

Produces:

Found 4 instructions

0x1000: pushq %rbp
    insn id:     580
    bytes:       [85]
    read regs:   rsp
    write regs:  rsp
    insn groups: mode64
    operands: 1
        X86Operand(X86Operand { size: 8, avx_bcast: X86_AVX_BCAST_INVALID, avx_zero_opmask: false, op_type: Reg(RegId(36)) })

0x1001: movq 0x13b8(%rip), %rax
    insn id:     442
    bytes:       [72, 139, 5, 184, 19, 0, 0]
    read regs:
    write regs:
    insn groups:
    operands: 2
        X86Operand(X86Operand { size: 8, avx_bcast: X86_AVX_BCAST_INVALID, avx_zero_opmask: false, op_type: Mem(X86OpMem(x86_op_mem { segment: 0, base: 41, index: 0, scale: 1, disp: 5048 })) })
        X86Operand(X86Operand { size: 8, avx_bcast: X86_AVX_BCAST_INVALID, avx_zero_opmask: false, op_type: Reg(RegId(35)) })

0x1008: jmp 0x8ae21
    insn id:     266
    bytes:       [233, 20, 158, 8, 0]
    read regs:
    write regs:
    insn groups: jump
    operands: 1
        X86Operand(X86Operand { size: 8, avx_bcast: X86_AVX_BCAST_INVALID, avx_zero_opmask: false, op_type: Imm(568865) })

0x100d: xorl %r12d, %r12d
    insn id:     327
    bytes:       [69, 49, 228]
    read regs:
    write regs:  rflags
    insn groups:
    operands: 2
        X86Operand(X86Operand { size: 4, avx_bcast: X86_AVX_BCAST_INVALID, avx_zero_opmask: false, op_type: Reg(RegId(222)) })
        X86Operand(X86Operand { size: 4, avx_bcast: X86_AVX_BCAST_INVALID, avx_zero_opmask: false, op_type: Reg(RegId(222)) })