mikros/unwinding
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Allow unwinder to be turned off

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This commit is contained in:
Gary Guo 2021-08-26 12:30:16 +01:00
parent e1c7c1ae60
commit 1e46c7ea3a
1 changed files with 59 additions and 1 deletions
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60
src/abi.rs
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@ -1,7 +1,6 @@
use core::ffi::c_void;
use core::ops;
use crate::arch::*;
use crate::util::*;
#[cfg(feature = "unwinder")]
@ -87,6 +86,7 @@ pub type UnwindTraceFn =
extern "C" fn(ctx: &mut UnwindContext<'_>, arg: *mut c_void) -> UnwindReasonCode;
#[cfg(not(feature = "unwinder"))]
#[repr(C)]
pub struct UnwindContext<'a> {
opaque: usize,
phantom: core::marker::PhantomData<&'a ()>,
@ -99,3 +99,61 @@ pub type PersonalityRoutine = extern "C" fn(
&mut UnwindException,
&mut UnwindContext<'_>,
) -> UnwindReasonCode;
#[cfg(not(feature = "unwinder"))]
macro_rules! binding {
($(extern $abi: literal $([$t:tt])? fn $name: ident ($($arg: ident : $arg_ty: ty),*$(,)?) $(-> $ret: ty)?;)*) => {
$(
#[allow(non_snake_case)]
#[inline]
pub $($t)? fn $name($($arg: $arg_ty),*) $(-> $ret)? {
extern $abi {
fn $name($($arg: $arg_ty),*) $(-> $ret)?;
}
unsafe { $name($($arg),*) }
}
)*
};
}
#[cfg(not(feature = "unwinder"))]
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;
extern "C-unwind" fn _Unwind_RaiseException(
exception: &mut UnwindException,
) -> UnwindReasonCode;
extern "C-unwind" fn _Unwind_ForceUnwind(
exception: &mut UnwindException,
stop: UnwindStopFn,
stop_arg: *mut c_void,
) -> UnwindReasonCode;
extern "C-unwind" fn _Unwind_Resume(exception: &mut UnwindException) -> !;
extern "C-unwind" fn _Unwind_Resume_or_Rethrow(
exception: &mut UnwindException,
) -> UnwindReasonCode;
extern "C" [unsafe] fn _Unwind_DeleteException(exception: *mut UnwindException);
extern "C-unwind" fn _Unwind_Backtrace(
trace: UnwindTraceFn,
trace_argument: *mut c_void,
) -> UnwindReasonCode;
}