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|
//! LLVM functionality exposed by the core.
//!
//! Also see [`crate::demangle::demangle_llvm`].
use binaryninjacore_sys::{
BNLlvmServicesAssemble, BNLlvmServicesAssembleFree, BNLlvmServicesDisasmInstruction,
BNLlvmServicesInit,
};
use std::ffi::{CStr, CString};
use std::os::raw::{c_char, c_int};
#[repr(i32)]
pub enum LlvmServicesDialect {
Unspecified = 0,
Att = 1,
Intel = 2,
}
#[repr(i32)]
pub enum LlvmServicesCodeModel {
Default = 0,
Small = 1,
Kernel = 2,
Medium = 3,
Large = 4,
}
#[repr(i32)]
pub enum LlvmServicesRelocMode {
Static = 0,
PIC = 1,
DynamicNoPIC = 2,
}
pub fn llvm_assemble(
code: &str,
dialect: LlvmServicesDialect,
triplet: &str,
code_model: LlvmServicesCodeModel,
reloc_mode: LlvmServicesRelocMode,
) -> Result<Vec<u8>, String> {
let code = CString::new(code).map_err(|_| "Invalid encoding in code string".to_string())?;
let arch_triple = CString::new(triplet)
.map_err(|_| "Invalid encoding in architecture triple string".to_string())?;
let mut out_bytes: *mut std::ffi::c_char = std::ptr::null_mut();
let mut out_bytes_len: std::ffi::c_int = 0;
let mut err_bytes: *mut std::ffi::c_char = std::ptr::null_mut();
let mut err_len: std::ffi::c_int = 0;
unsafe {
BNLlvmServicesInit();
}
let result = unsafe {
BNLlvmServicesAssemble(
code.as_ptr(),
dialect as i32,
arch_triple.as_ptr(),
code_model as i32,
reloc_mode as i32,
&mut out_bytes as *mut *mut std::ffi::c_char,
&mut out_bytes_len as *mut std::ffi::c_int,
&mut err_bytes as *mut *mut std::ffi::c_char,
&mut err_len as *mut std::ffi::c_int,
)
};
let out = if out_bytes_len == 0 {
Vec::new()
} else {
unsafe {
std::slice::from_raw_parts(
out_bytes as *const std::ffi::c_char as *const u8,
out_bytes_len as usize,
)
}
.to_vec()
};
let errors = if err_len == 0 {
"".into()
} else {
String::from_utf8_lossy(unsafe {
std::slice::from_raw_parts(
err_bytes as *const std::ffi::c_char as *const u8,
err_len as usize,
)
})
.into_owned()
};
unsafe {
BNLlvmServicesAssembleFree(out_bytes, err_bytes);
}
if result == 0 {
Ok(out)
} else {
Err(errors)
}
}
pub fn llvm_disassemble(triplet: &str, data: &[u8], address: u64) -> Option<(usize, String)> {
unsafe {
let triplet = CString::new(triplet).ok()?;
let mut src = data.to_vec();
let mut buf = vec![0u8; 256];
let instr_len = BNLlvmServicesDisasmInstruction(
triplet.as_ptr(),
src.as_mut_ptr(),
src.len() as c_int,
address,
buf.as_mut_ptr() as *mut c_char,
buf.len(),
);
if instr_len > 0 {
// Convert buf (u8) → &CStr by finding the first NUL
if let Some(z) = buf.iter().position(|&b| b == 0) {
let s = CStr::from_bytes_with_nul(&buf[..=z])
.unwrap()
.to_string_lossy()
.into_owned();
Some((instr_len as usize, s))
} else {
// Callee didn't NULL terminate, return an empty string
Some((instr_len as usize, String::new()))
}
} else {
None
}
}
}
|
