uwuwind

src/lib.rs

@@ -0,0 +1,38 @@
+#![allow(dead_code)]
+
+use std::sync::atomic::AtomicPtr;
+
+macro_rules! trace {
+    ($($tt:tt)*) => {
+        eprintln!("UWUWIND TRACE | uwuwind/{}:{}: {}", file!(), line!(), format_args!($($tt)*));
+    };
+}
+
+pub mod uw;
+
+mod arch;
+mod dwarf;
+mod identify;
+mod walk;
+
+#[allow(nonstandard_style)]
+pub unsafe extern "C" fn _UnwindRaiseException(
+    exception_object: *mut uw::_Unwind_Exception,
+) -> uw::_Unwind_Reason_Code {
+    println!("someone raised an exception with addr {exception_object:p}");
+
+    crate::dwarf::dwarf_info(arch::get_rip() as _);
+
+    // walk::fp::walk();
+
+    std::process::abort();
+}
+
+// This is normally provided by the language runtime through the unwind info block.
+// We don't want to access that usually because Rust messes with it :(.
+static PERSONALITY_ROUTINE: AtomicPtr<()> = AtomicPtr::new(core::ptr::null_mut());
+
+pub unsafe fn set_personality_routine(routine: uw::PersonalityRoutine) {
+    let ptr: *mut () = std::mem::transmute(routine);
+    PERSONALITY_ROUTINE.store(ptr, std::sync::atomic::Ordering::Relaxed);
+}