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Ugly hack to *sometimes* fix instruction skipping

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momo5502
2025-04-06 10:32:00 +02:00
parent 3450a6a517
commit e40e1bfb83
1 changed files with 13 additions and 4 deletions
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17
src/icicle/src/icicle.rs
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@@ -130,6 +130,7 @@ impl icicle_vm::CodeInjector for InstructionHookInjector {
}
struct ExecutionHooks {
vm_ptr: *mut icicle_vm::Vm,
skip_ip: Option<u64>,
stop: Rc<RefCell<bool>>,
generic_hooks: HookContainer<dyn Fn(u64)>,
@@ -138,8 +139,9 @@ struct ExecutionHooks {
}
impl ExecutionHooks {
pub fn new(stop_value: Rc<RefCell<bool>>) -> Self {
pub fn new(stop_value: Rc<RefCell<bool>>, vm: &mut icicle_vm::Vm) -> Self {
Self {
vm_ptr: vm as *mut icicle_vm::Vm,
skip_ip: None,
stop: stop_value,
generic_hooks: HookContainer::new(),
@@ -171,6 +173,13 @@ impl ExecutionHooks {
if self.skip_ip.is_some() {
skip = self.skip_ip.unwrap() == address;
self.skip_ip = None;
// TODO: Get rid of that
unsafe {
let vm = &mut *self.vm_ptr;
vm.icount_limit = vm.icount_limit.saturating_sub(1);
vm.next_timer = vm.next_timer.saturating_sub(1);
}
}
if !skip {
@@ -213,7 +222,7 @@ impl ExecutionHooks {
pub struct IcicleEmulator {
executing_thread: std::thread::ThreadId,
vm: icicle_vm::Vm,
vm: Box<icicle_vm::Vm>,
reg: registers::X64RegisterNodes,
syscall_hooks: HookContainer<dyn Fn()>,
violation_hooks: HookContainer<dyn Fn(u64, u8, bool) -> bool>,
@@ -268,9 +277,9 @@ impl icicle_cpu::mem::IoMemory for MmioHandler {
impl IcicleEmulator {
pub fn new() -> Self {
let mut virtual_machine = create_x64_vm();
let mut virtual_machine = Box::new(create_x64_vm());
let stop_value = Rc::new(RefCell::new(false));
let exec_hooks = Rc::new(RefCell::new(ExecutionHooks::new(stop_value.clone())));
let exec_hooks = Rc::new(RefCell::new(ExecutionHooks::new(stop_value.clone(), &mut virtual_machine)));
let exec_hooks_clone = Rc::clone(&exec_hooks);