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event_sink.rs
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event_sink.rs
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/*
* Copyright © 2020-2021 Keegan Saunders
*
* Licence: wxWindows Library Licence, Version 3.1
*/
#![cfg_attr(
any(target_arch = "x86_64", target_arch = "x86"),
allow(clippy::unnecessary_cast)
)]
use crate::NativePointer;
use frida_gum_sys as gum_sys;
use gum_sys::_GumEvent as GumEvent;
use std::os::raw::c_void;
#[derive(FromPrimitive)]
#[repr(u32)]
#[cfg_attr(doc_cfg, doc(cfg(feature = "event-sink")))]
pub enum EventMask {
None = gum_sys::_GumEventType_GUM_NOTHING as u32,
Call = gum_sys::_GumEventType_GUM_CALL as u32,
Ret = gum_sys::_GumEventType_GUM_RET as u32,
Exec = gum_sys::_GumEventType_GUM_EXEC as u32,
Block = gum_sys::_GumEventType_GUM_BLOCK as u32,
Compile = gum_sys::_GumEventType_GUM_COMPILE as u32,
}
#[cfg_attr(doc_cfg, doc(cfg(feature = "event-sink")))]
pub enum Event {
Call {
location: NativePointer,
target: NativePointer,
depth: i32,
},
Ret {
location: NativePointer,
target: NativePointer,
depth: i32,
},
Exec {
location: NativePointer,
},
Block {
start: NativePointer,
end: NativePointer,
},
Compile {
start: NativePointer,
end: NativePointer,
},
}
#[cfg_attr(doc_cfg, doc(cfg(feature = "event-sink")))]
impl From<GumEvent> for Event {
fn from(event: GumEvent) -> Event {
match num::FromPrimitive::from_u32(unsafe { event.type_ }).unwrap() {
EventMask::None => unreachable!(),
EventMask::Call => {
let call = unsafe { event.call };
Event::Call {
location: NativePointer(call.location),
target: NativePointer(call.target),
depth: call.depth,
}
}
EventMask::Ret => {
let ret = unsafe { event.ret };
Event::Ret {
location: NativePointer(ret.location),
target: NativePointer(ret.target),
depth: ret.depth,
}
}
EventMask::Exec => {
let exec = unsafe { event.exec };
Event::Exec {
location: NativePointer(exec.location),
}
}
EventMask::Block => {
let block = unsafe { event.block };
Event::Block {
start: NativePointer(block.start),
end: NativePointer(block.end),
}
}
EventMask::Compile => {
let compile = unsafe { event.compile };
Event::Compile {
start: NativePointer(compile.start),
end: NativePointer(compile.end),
}
}
}
}
}
#[cfg_attr(doc_cfg, doc(cfg(feature = "event-sink")))]
pub trait EventSink {
fn query_mask(&mut self) -> EventMask;
fn start(&mut self);
fn process(&mut self, event: &Event);
fn flush(&mut self);
fn stop(&mut self);
}
unsafe extern "C" fn call_start<S: EventSink>(user_data: *mut c_void) {
let event_sink: &mut S = &mut *(user_data as *mut S);
event_sink.start();
}
unsafe extern "C" fn call_process<S: EventSink>(
user_data: *mut c_void,
event: *const frida_gum_sys::GumEvent,
) {
let event_sink: &mut S = &mut *(user_data as *mut S);
event_sink.process(&(*event).into());
}
unsafe extern "C" fn call_flush<S: EventSink>(user_data: *mut c_void) {
let event_sink: &mut S = &mut *(user_data as *mut S);
event_sink.flush();
}
unsafe extern "C" fn call_stop<S: EventSink>(user_data: *mut c_void) {
let event_sink: &mut S = &mut *(user_data as *mut S);
event_sink.stop();
}
unsafe extern "C" fn call_query_mask<S: EventSink>(
user_data: *mut c_void,
) -> frida_gum_sys::GumEventType {
let event_sink: &mut S = &mut *(user_data as *mut S);
event_sink.query_mask() as u32
}
pub(crate) fn event_sink_transform<S: EventSink>(
mut event_sink: &S,
) -> *mut frida_gum_sys::GumEventSink {
let rust = frida_gum_sys::RustEventSinkVTable {
user_data: &mut event_sink as *mut _ as *mut c_void,
query_mask: Some(call_query_mask::<S>),
start: Some(call_start::<S>),
process: Some(call_process::<S>),
flush: Some(call_flush::<S>),
stop: Some(call_stop::<S>),
};
unsafe { frida_gum_sys::gum_rust_event_sink_new(rust) }
}