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Add stubs for __CxxFrameHandler4 and __GSHandlerCheck_EH4 #438

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Merged
gurry merged 7 commits into from
Aug 6, 2025
+23 −3
Merged

Add stubs for __CxxFrameHandler4 and __GSHandlerCheck_EH4 #438

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bae957d
Add stubs for __CxxFrameHandler4 and __GSHandlerCheck_EH4
ladipro Aug 4, 2025
6d188bc
Update crates/wdk-sys/src/lib.rs
ladipro Aug 4, 2025
4f0b488
Update crates/wdk-sys/src/lib.rs
ladipro Aug 4, 2025
5d2fc8d
Fix formatting
ladipro Aug 4, 2025
3723b76
Merge branch 'main' into add-fh4
gurry Aug 5, 2025
f51cdfc
Use const extern
ladipro Aug 5, 2025
33e205e
Merge branch 'main' into add-fh4
gurry Aug 5, 2025
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25 changes: 24 additions & 1 deletion crates/wdk-sys/src/lib.rs
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Expand Up @@ -120,7 +120,7 @@ mod macros;
#[no_mangle]
pub static _fltused: () = ();

// FIXME: Is there any way to avoid this stub? See https://github.com/rust-lang/rust/issues/101134
// FIXME: Is there any way to avoid these stubs? See https://github.com/rust-lang/rust/issues/101134
#[cfg(panic = "abort")]
#[allow(missing_docs)]
#[allow(clippy::missing_const_for_fn)] // const extern is not yet supported: https://github.com/rust-lang/rust/issues/64926
Expand All @@ -129,6 +129,29 @@ pub extern "system" fn __CxxFrameHandler3() -> i32 {
0
}

#[cfg(panic = "abort")]
#[allow(missing_docs)]
#[allow(clippy::missing_const_for_fn)] // const extern is not yet supported: https://github.com/rust-lang/rust/issues/64926
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#[no_mangle]
pub extern "system" fn __CxxFrameHandler4() -> i32 {
// This is a stub for the C++ exception handling frame handler. It's never
// called but it needs to be distinct from __CxxFrameHandler3 to not confuse
// binary analysis tools. We return a different value to prevent folding.
1
}

#[cfg(panic = "abort")]
#[allow(missing_docs)]
#[allow(clippy::missing_const_for_fn)] // const extern is not yet supported: https://github.com/rust-lang/rust/issues/64926
#[no_mangle]
pub extern "system" fn __GSHandlerCheck_EH4() -> i32 {
// This is a stub for the C++ exception handling frame handler. It's never
// called but it needs to be distinct from __CxxFrameHandler3 and
// __CxxFrameHandler4 to not confuse binary analysis tools. We return a
// different value to prevent folding.
2
}

#[cfg(any(
driver_model__driver_type = "WDM",
driver_model__driver_type = "KMDF",
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