1 files changed, 172 insertions, 0 deletions
diff --git a/vendor/unwinding/src/abi.rs b/vendor/unwinding/src/abi.rs
new file mode 100644
index 000000000..12766c118
--- /dev/null
+++ b/vendor/unwinding/src/abi.rs
@@ -0,0 +1,172 @@
+use core::ffi::c_void;
+use core::ops;
+
+use crate::util::*;
+
+#[cfg(not(feature = "unwinder"))]
+use crate::arch::Arch;
+#[cfg(feature = "unwinder")]
+pub use crate::unwinder::*;
+
+#[repr(transparent)]
+#[derive(Clone, Copy, PartialEq, Eq)]
+pub struct UnwindReasonCode(pub c_int);
+
+#[allow(unused)]
+impl UnwindReasonCode {
+    pub const NO_REASON: Self = Self(0);
+    pub const FOREIGN_EXCEPTION_CAUGHT: Self = Self(1);
+    pub const FATAL_PHASE2_ERROR: Self = Self(2);
+    pub const FATAL_PHASE1_ERROR: Self = Self(3);
+    pub const NORMAL_STOP: Self = Self(4);
+    pub const END_OF_STACK: Self = Self(5);
+    pub const HANDLER_FOUND: Self = Self(6);
+    pub const INSTALL_CONTEXT: Self = Self(7);
+    pub const CONTINUE_UNWIND: Self = Self(8);
+}
+
+#[repr(transparent)]
+#[derive(Clone, Copy, PartialEq, Eq)]
+pub struct UnwindAction(pub c_int);
+
+impl UnwindAction {
+    pub const SEARCH_PHASE: Self = Self(1);
+    pub const CLEANUP_PHASE: Self = Self(2);
+    pub const HANDLER_FRAME: Self = Self(4);
+    pub const FORCE_UNWIND: Self = Self(8);
+    pub const END_OF_STACK: Self = Self(16);
+}
+
+impl ops::BitOr for UnwindAction {
+    type Output = Self;
+
+    #[inline]
+    fn bitor(self, rhs: Self) -> Self {
+        Self(self.0 | rhs.0)
+    }
+}
+
+impl UnwindAction {
+    #[inline]
+    pub const fn empty() -> Self {
+        Self(0)
+    }
+
+    #[inline]
+    pub const fn contains(&self, other: Self) -> bool {
+        self.0 & other.0 != 0
+    }
+}
+
+pub type UnwindExceptionCleanupFn = unsafe extern "C" fn(UnwindReasonCode, *mut UnwindException);
+
+pub type UnwindStopFn = unsafe extern "C" fn(
+    c_int,
+    UnwindAction,
+    u64,
+    *mut UnwindException,
+    &mut UnwindContext<'_>,
+    *mut c_void,
+) -> UnwindReasonCode;
+
+#[cfg(not(feature = "unwinder"))]
+#[repr(C)]
+pub struct UnwindException {
+    pub exception_class: u64,
+    pub exception_cleanup: Option<UnwindExceptionCleanupFn>,
+    private: [usize; Arch::UNWIND_PRIVATE_DATA_SIZE],
+}
+
+pub type UnwindTraceFn =
+    extern "C" fn(ctx: &UnwindContext<'_>, arg: *mut c_void) -> UnwindReasonCode;
+
+#[cfg(not(feature = "unwinder"))]
+#[repr(C)]
+pub struct UnwindContext<'a> {
+    opaque: usize,
+    phantom: core::marker::PhantomData<&'a ()>,
+}
+
+pub type PersonalityRoutine = unsafe extern "C" fn(
+    c_int,
+    UnwindAction,
+    u64,
+    *mut UnwindException,
+    &mut UnwindContext<'_>,
+) -> UnwindReasonCode;
+
+#[cfg(not(feature = "unwinder"))]
+macro_rules! binding {
+    () => {};
+    (unsafe extern $abi: literal fn $name: ident ($($arg: ident : $arg_ty: ty),*$(,)?) $(-> $ret: ty)?; $($rest: tt)*) => {
+        extern $abi {
+            pub fn $name($($arg: $arg_ty),*) $(-> $ret)?;
+        }
+        binding!($($rest)*);
+    };
+
+    (extern $abi: literal fn $name: ident ($($arg: ident : $arg_ty: ty),*$(,)?) $(-> $ret: ty)?; $($rest: tt)*) => {
+        #[allow(non_snake_case)]
+        #[inline]
+        pub fn $name($($arg: $arg_ty),*) $(-> $ret)? {
+            extern $abi {
+                fn $name($($arg: $arg_ty),*) $(-> $ret)?;
+            }
+            unsafe { $name($($arg),*) }
+        }
+        binding!($($rest)*);
+    };
+}
+
+#[cfg(feature = "unwinder")]
+macro_rules! binding {
+    () => {};
+    (unsafe extern $abi: literal fn $name: ident ($($arg: ident : $arg_ty: ty),*$(,)?) $(-> $ret: ty)?; $($rest: tt)*) => {
+        const _: unsafe extern $abi fn($($arg_ty),*) $(-> $ret)? = $name;
+    };
+
+    (extern $abi: literal fn $name: ident ($($arg: ident : $arg_ty: ty),*$(,)?) $(-> $ret: ty)?; $($rest: tt)*) => {
+        const _: extern $abi fn($($arg_ty),*) $(-> $ret)? = $name;
+    };
+}
+
+binding! {
+    extern "C" fn _Unwind_GetGR(unwind_ctx: &UnwindContext<'_>, index: c_int) -> usize;
+    extern "C" fn _Unwind_GetCFA(unwind_ctx: &UnwindContext<'_>) -> usize;
+    extern "C" fn _Unwind_SetGR(
+        unwind_ctx: &mut UnwindContext<'_>,
+        index: c_int,
+        value: usize,
+    );
+    extern "C" fn _Unwind_GetIP(unwind_ctx: &UnwindContext<'_>) -> usize;
+    extern "C" fn _Unwind_GetIPInfo(
+        unwind_ctx: &UnwindContext<'_>,
+        ip_before_insn: &mut c_int,
+    ) -> usize;
+    extern "C" fn _Unwind_SetIP(
+        unwind_ctx: &mut UnwindContext<'_>,
+        value: usize,
+    );
+    extern "C" fn _Unwind_GetLanguageSpecificData(unwind_ctx: &UnwindContext<'_>) -> *mut c_void;
+    extern "C" fn _Unwind_GetRegionStart(unwind_ctx: &UnwindContext<'_>) -> usize;
+    extern "C" fn _Unwind_GetTextRelBase(unwind_ctx: &UnwindContext<'_>) -> usize;
+    extern "C" fn _Unwind_GetDataRelBase(unwind_ctx: &UnwindContext<'_>) -> usize;
+    extern "C" fn _Unwind_FindEnclosingFunction(pc: *mut c_void) -> *mut c_void;
+    unsafe extern "C-unwind" fn _Unwind_RaiseException(
+        exception: *mut UnwindException,
+    ) -> UnwindReasonCode;
+    unsafe extern "C-unwind" fn _Unwind_ForcedUnwind(
+        exception: *mut UnwindException,
+        stop: UnwindStopFn,
+        stop_arg: *mut c_void,
+    ) -> UnwindReasonCode;
+    unsafe extern "C-unwind" fn _Unwind_Resume(exception: *mut UnwindException) -> !;
+    unsafe extern "C-unwind" fn _Unwind_Resume_or_Rethrow(
+        exception: *mut UnwindException,
+    ) -> UnwindReasonCode;
+    unsafe extern "C" fn _Unwind_DeleteException(exception: *mut UnwindException);
+    extern "C-unwind" fn _Unwind_Backtrace(
+        trace: UnwindTraceFn,
+        trace_argument: *mut c_void,
+    ) -> UnwindReasonCode;
+}