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5144055055
Make `_Unwind_Action` a type alias, not enum It's bitflags in practice, so an enum is unsound, as an enum must only have the described values. The x86_64 psABI declares it as a `typedef int _Unwind_Action`, which seems reasonable. I made a newtype first but that was more annoying than just a typedef. We don't really use this value for much other than a short check. I ran `x check library --target aarch64-unknown-linux-gnu,x86_64-pc-windows-gnu,x86_64-fortanix-unknown-sgx,x86_64-unknown-haiku,x86_64-unknown-fuchsi a,x86_64-unknown-freebsd,x86_64-unknown-dragonfly,x86_64-unknown-netbsd,x86_64-unknown-openbsd,x86_64-unknown-redox,riscv64-linux-android,armv7-unknown-freebsd` (and some more but they failed to build for other reasons :D) fixes #138558 r? workingjubilee have fun
101 lines
3.6 KiB
Rust
101 lines
3.6 KiB
Rust
#![allow(nonstandard_style)]
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use core::ffi::{c_int, c_void};
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pub type _Unwind_Action = c_int;
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pub const _UA_SEARCH_PHASE: c_int = 1;
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pub const _UA_CLEANUP_PHASE: c_int = 2;
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pub const _UA_HANDLER_FRAME: c_int = 4;
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pub const _UA_FORCE_UNWIND: c_int = 8;
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pub const _UA_END_OF_STACK: c_int = 16;
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#[repr(C)]
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#[derive(Debug, Copy, Clone, PartialEq)]
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pub enum _Unwind_Reason_Code {
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_URC_NO_REASON = 0,
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_URC_FOREIGN_EXCEPTION_CAUGHT = 1,
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_URC_FATAL_PHASE2_ERROR = 2,
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_URC_FATAL_PHASE1_ERROR = 3,
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_URC_NORMAL_STOP = 4,
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_URC_END_OF_STACK = 5,
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_URC_HANDLER_FOUND = 6,
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_URC_INSTALL_CONTEXT = 7,
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_URC_CONTINUE_UNWIND = 8,
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_URC_FAILURE = 9, // used only by ARM EHABI
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}
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pub use _Unwind_Reason_Code::*;
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pub use unwinding::abi::{UnwindContext, UnwindException};
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pub enum _Unwind_Context {}
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pub use unwinding::custom_eh_frame_finder::{
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EhFrameFinder, FrameInfo, FrameInfoKind, set_custom_eh_frame_finder,
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};
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pub type _Unwind_Exception_Class = u64;
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pub type _Unwind_Word = *const u8;
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pub type _Unwind_Ptr = *const u8;
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pub const unwinder_private_data_size: usize = size_of::<UnwindException>()
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- size_of::<_Unwind_Exception_Class>()
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- size_of::<_Unwind_Exception_Cleanup_Fn>();
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pub type _Unwind_Exception_Cleanup_Fn =
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Option<extern "C" fn(unwind_code: _Unwind_Reason_Code, exception: *mut _Unwind_Exception)>;
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#[repr(C)]
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pub struct _Unwind_Exception {
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pub exception_class: _Unwind_Exception_Class,
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pub exception_cleanup: _Unwind_Exception_Cleanup_Fn,
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pub private: [_Unwind_Word; unwinder_private_data_size],
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}
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pub unsafe fn _Unwind_GetDataRelBase(ctx: *mut _Unwind_Context) -> _Unwind_Ptr {
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let ctx = unsafe { &mut *(ctx as *mut UnwindContext<'_>) };
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unwinding::abi::_Unwind_GetDataRelBase(ctx) as _Unwind_Ptr
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}
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pub unsafe fn _Unwind_GetTextRelBase(ctx: *mut _Unwind_Context) -> _Unwind_Ptr {
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let ctx = unsafe { &mut *(ctx as *mut UnwindContext<'_>) };
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unwinding::abi::_Unwind_GetTextRelBase(ctx) as _Unwind_Ptr
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}
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pub unsafe fn _Unwind_GetRegionStart(ctx: *mut _Unwind_Context) -> _Unwind_Ptr {
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let ctx = unsafe { &mut *(ctx as *mut UnwindContext<'_>) };
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unwinding::abi::_Unwind_GetRegionStart(ctx) as _Unwind_Ptr
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}
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pub unsafe fn _Unwind_SetGR(ctx: *mut _Unwind_Context, reg_index: c_int, value: _Unwind_Word) {
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let ctx = unsafe { &mut *(ctx as *mut UnwindContext<'_>) };
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unwinding::abi::_Unwind_SetGR(ctx, reg_index, value as usize)
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}
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pub unsafe fn _Unwind_SetIP(ctx: *mut _Unwind_Context, value: _Unwind_Word) {
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let ctx = unsafe { &mut *(ctx as *mut UnwindContext<'_>) };
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unwinding::abi::_Unwind_SetIP(ctx, value as usize)
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}
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pub unsafe fn _Unwind_GetIPInfo(
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ctx: *mut _Unwind_Context,
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ip_before_insn: *mut c_int,
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) -> _Unwind_Word {
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let ctx = unsafe { &mut *(ctx as *mut UnwindContext<'_>) };
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let ip_before_insn = unsafe { &mut *(ip_before_insn as *mut c_int) };
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unsafe { &*(unwinding::abi::_Unwind_GetIPInfo(ctx, ip_before_insn) as _Unwind_Word) }
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}
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pub unsafe fn _Unwind_GetLanguageSpecificData(ctx: *mut _Unwind_Context) -> *mut c_void {
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let ctx = unsafe { &mut *(ctx as *mut UnwindContext<'_>) };
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unwinding::abi::_Unwind_GetLanguageSpecificData(ctx)
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}
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pub unsafe fn _Unwind_RaiseException(exception: *mut _Unwind_Exception) -> _Unwind_Reason_Code {
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let exception = unsafe { &mut *(exception as *mut UnwindException) };
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unsafe { core::mem::transmute(unwinding::abi::_Unwind_RaiseException(exception)) }
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}
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pub unsafe fn _Unwind_DeleteException(exception: *mut _Unwind_Exception) {
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let exception = unsafe { &mut *(exception as *mut UnwindException) };
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unsafe { unwinding::abi::_Unwind_DeleteException(exception) }
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}
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