1 #![allow(nonstandard_style)]
3 use libc::{c_int, c_void, uintptr_t};
6 #[derive(Debug, Copy, Clone, PartialEq)]
7 pub enum _Unwind_Reason_Code {
9 _URC_FOREIGN_EXCEPTION_CAUGHT = 1,
10 _URC_FATAL_PHASE2_ERROR = 2,
11 _URC_FATAL_PHASE1_ERROR = 3,
13 _URC_END_OF_STACK = 5,
14 _URC_HANDLER_FOUND = 6,
15 _URC_INSTALL_CONTEXT = 7,
16 _URC_CONTINUE_UNWIND = 8,
17 _URC_FAILURE = 9, // used only by ARM EHABI
19 pub use _Unwind_Reason_Code::*;
21 pub type _Unwind_Exception_Class = u64;
22 pub type _Unwind_Word = uintptr_t;
23 pub type _Unwind_Ptr = uintptr_t;
24 pub type _Unwind_Trace_Fn =
25 extern "C" fn(ctx: *mut _Unwind_Context, arg: *mut c_void) -> _Unwind_Reason_Code;
27 #[cfg(target_arch = "x86")]
28 pub const unwinder_private_data_size: usize = 5;
30 #[cfg(target_arch = "x86_64")]
31 pub const unwinder_private_data_size: usize = 6;
33 #[cfg(all(target_arch = "arm", not(any(target_os = "ios", target_os = "watchos"))))]
34 pub const unwinder_private_data_size: usize = 20;
36 #[cfg(all(target_arch = "arm", any(target_os = "ios", target_os = "watchos")))]
37 pub const unwinder_private_data_size: usize = 5;
39 #[cfg(all(target_arch = "aarch64", target_pointer_width = "64"))]
40 pub const unwinder_private_data_size: usize = 2;
42 #[cfg(all(target_arch = "aarch64", target_pointer_width = "32"))]
43 pub const unwinder_private_data_size: usize = 5;
45 #[cfg(target_arch = "m68k")]
46 pub const unwinder_private_data_size: usize = 2;
48 #[cfg(target_arch = "mips")]
49 pub const unwinder_private_data_size: usize = 2;
51 #[cfg(target_arch = "mips64")]
52 pub const unwinder_private_data_size: usize = 2;
54 #[cfg(any(target_arch = "powerpc", target_arch = "powerpc64"))]
55 pub const unwinder_private_data_size: usize = 2;
57 #[cfg(target_arch = "s390x")]
58 pub const unwinder_private_data_size: usize = 2;
60 #[cfg(any(target_arch = "sparc", target_arch = "sparc64"))]
61 pub const unwinder_private_data_size: usize = 2;
63 #[cfg(any(target_arch = "riscv64", target_arch = "riscv32"))]
64 pub const unwinder_private_data_size: usize = 2;
66 #[cfg(target_os = "emscripten")]
67 pub const unwinder_private_data_size: usize = 20;
69 #[cfg(all(target_arch = "hexagon", target_os = "linux"))]
70 pub const unwinder_private_data_size: usize = 35;
73 pub struct _Unwind_Exception {
74 pub exception_class: _Unwind_Exception_Class,
75 pub exception_cleanup: _Unwind_Exception_Cleanup_Fn,
76 pub private: [_Unwind_Word; unwinder_private_data_size],
79 pub enum _Unwind_Context {}
81 pub type _Unwind_Exception_Cleanup_Fn =
82 extern "C" fn(unwind_code: _Unwind_Reason_Code, exception: *mut _Unwind_Exception);
84 // FIXME: The `#[link]` attributes on `extern "C"` block marks those symbols declared in
85 // the block are reexported in dylib build of libstd. This is needed when build rustc with
86 // feature `llvm-libunwind', as no other cdylib will provided those _Unwind_* symbols.
87 // However the `link` attribute is duplicated multiple times and does not just export symbol,
88 // a better way to manually export symbol would be another attribute like `#[export]`.
89 // See the logic in function rustc_codegen_ssa::src::back::exported_symbols, module
90 // rustc_codegen_ssa::src::back::symbol_export, rustc_middle::middle::exported_symbols
93 all(feature = "llvm-libunwind", any(target_os = "fuchsia", target_os = "linux")),
94 link(name = "unwind", kind = "static", modifiers = "-bundle")
97 pub fn _Unwind_Resume(exception: *mut _Unwind_Exception) -> !;
100 pub fn _Unwind_DeleteException(exception: *mut _Unwind_Exception);
101 pub fn _Unwind_GetLanguageSpecificData(ctx: *mut _Unwind_Context) -> *mut c_void;
102 pub fn _Unwind_GetRegionStart(ctx: *mut _Unwind_Context) -> _Unwind_Ptr;
103 pub fn _Unwind_GetTextRelBase(ctx: *mut _Unwind_Context) -> _Unwind_Ptr;
104 pub fn _Unwind_GetDataRelBase(ctx: *mut _Unwind_Context) -> _Unwind_Ptr;
108 if #[cfg(any(target_os = "ios", target_os = "watchos", target_os = "netbsd", not(target_arch = "arm")))] {
111 #[derive(Copy, Clone, PartialEq)]
112 pub enum _Unwind_Action {
113 _UA_SEARCH_PHASE = 1,
114 _UA_CLEANUP_PHASE = 2,
115 _UA_HANDLER_FRAME = 4,
116 _UA_FORCE_UNWIND = 8,
117 _UA_END_OF_STACK = 16,
119 pub use _Unwind_Action::*;
122 all(feature = "llvm-libunwind", any(target_os = "fuchsia", target_os = "linux")),
123 link(name = "unwind", kind = "static", modifiers = "-bundle")
126 pub fn _Unwind_GetGR(ctx: *mut _Unwind_Context, reg_index: c_int) -> _Unwind_Word;
127 pub fn _Unwind_SetGR(ctx: *mut _Unwind_Context, reg_index: c_int, value: _Unwind_Word);
128 pub fn _Unwind_GetIP(ctx: *mut _Unwind_Context) -> _Unwind_Word;
129 pub fn _Unwind_SetIP(ctx: *mut _Unwind_Context, value: _Unwind_Word);
130 pub fn _Unwind_GetIPInfo(ctx: *mut _Unwind_Context, ip_before_insn: *mut c_int)
132 pub fn _Unwind_FindEnclosingFunction(pc: *mut c_void) -> *mut c_void;
138 #[derive(Copy, Clone, PartialEq)]
139 pub enum _Unwind_State {
140 _US_VIRTUAL_UNWIND_FRAME = 0,
141 _US_UNWIND_FRAME_STARTING = 1,
142 _US_UNWIND_FRAME_RESUME = 2,
144 _US_FORCE_UNWIND = 8,
145 _US_END_OF_STACK = 16,
147 pub use _Unwind_State::*;
150 enum _Unwind_VRS_Result {
152 _UVRSR_NOT_IMPLEMENTED = 1,
156 enum _Unwind_VRS_RegClass {
163 use _Unwind_VRS_RegClass::*;
165 enum _Unwind_VRS_DataRepresentation {
173 use _Unwind_VRS_DataRepresentation::*;
175 pub const UNWIND_POINTER_REG: c_int = 12;
176 pub const UNWIND_SP_REG: c_int = 13;
177 pub const UNWIND_IP_REG: c_int = 15;
180 all(feature = "llvm-libunwind", any(target_os = "fuchsia", target_os = "linux")),
181 link(name = "unwind", kind = "static", modifiers = "-bundle")
184 fn _Unwind_VRS_Get(ctx: *mut _Unwind_Context,
185 regclass: _Unwind_VRS_RegClass,
187 repr: _Unwind_VRS_DataRepresentation,
189 -> _Unwind_VRS_Result;
191 fn _Unwind_VRS_Set(ctx: *mut _Unwind_Context,
192 regclass: _Unwind_VRS_RegClass,
194 repr: _Unwind_VRS_DataRepresentation,
196 -> _Unwind_VRS_Result;
199 // On Android or ARM/Linux, these are implemented as macros:
201 pub unsafe fn _Unwind_GetGR(ctx: *mut _Unwind_Context, reg_index: c_int) -> _Unwind_Word {
202 let mut val: _Unwind_Word = 0;
203 _Unwind_VRS_Get(ctx, _UVRSC_CORE, reg_index as _Unwind_Word, _UVRSD_UINT32,
204 &mut val as *mut _ as *mut c_void);
208 pub unsafe fn _Unwind_SetGR(ctx: *mut _Unwind_Context, reg_index: c_int, value: _Unwind_Word) {
209 let mut value = value;
210 _Unwind_VRS_Set(ctx, _UVRSC_CORE, reg_index as _Unwind_Word, _UVRSD_UINT32,
211 &mut value as *mut _ as *mut c_void);
214 pub unsafe fn _Unwind_GetIP(ctx: *mut _Unwind_Context)
216 let val = _Unwind_GetGR(ctx, UNWIND_IP_REG);
217 (val & !1) as _Unwind_Word
220 pub unsafe fn _Unwind_SetIP(ctx: *mut _Unwind_Context,
221 value: _Unwind_Word) {
222 // Propagate thumb bit to instruction pointer
223 let thumb_state = _Unwind_GetGR(ctx, UNWIND_IP_REG) & 1;
224 let value = value | thumb_state;
225 _Unwind_SetGR(ctx, UNWIND_IP_REG, value);
228 pub unsafe fn _Unwind_GetIPInfo(ctx: *mut _Unwind_Context,
229 ip_before_insn: *mut c_int)
235 // This function also doesn't exist on Android or ARM/Linux, so make it a no-op
236 pub unsafe fn _Unwind_FindEnclosingFunction(pc: *mut c_void) -> *mut c_void {
243 if #[cfg(not(all(target_os = "ios", target_arch = "arm")))] {
246 all(feature = "llvm-libunwind", any(target_os = "fuchsia", target_os = "linux")),
247 link(name = "unwind", kind = "static", modifiers = "-bundle")
250 pub fn _Unwind_RaiseException(exception: *mut _Unwind_Exception) -> _Unwind_Reason_Code;
253 all(feature = "llvm-libunwind", any(target_os = "fuchsia", target_os = "linux")),
254 link(name = "unwind", kind = "static", modifiers = "-bundle")
257 pub fn _Unwind_Backtrace(trace: _Unwind_Trace_Fn,
258 trace_argument: *mut c_void)
259 -> _Unwind_Reason_Code;
262 // 32-bit iOS uses SjLj and does not provide _Unwind_Backtrace()
264 pub fn _Unwind_SjLj_RaiseException(e: *mut _Unwind_Exception) -> _Unwind_Reason_Code;
267 pub use _Unwind_SjLj_RaiseException as _Unwind_RaiseException;
272 if #[cfg(all(windows, target_arch = "x86_64", target_env = "gnu"))] {
273 // We declare these as opaque types. This is fine since you just need to
274 // pass them to _GCC_specific_handler and forget about them.
275 pub enum EXCEPTION_RECORD {}
276 pub type LPVOID = *mut c_void;
278 pub enum DISPATCHER_CONTEXT {}
279 pub type EXCEPTION_DISPOSITION = c_int;
280 type PersonalityFn = unsafe extern "C" fn(version: c_int,
281 actions: _Unwind_Action,
282 exception_class: _Unwind_Exception_Class,
283 exception_object: *mut _Unwind_Exception,
284 context: *mut _Unwind_Context)
285 -> _Unwind_Reason_Code;
288 pub fn _GCC_specific_handler(exceptionRecord: *mut EXCEPTION_RECORD,
289 establisherFrame: LPVOID,
290 contextRecord: *mut CONTEXT,
291 dispatcherContext: *mut DISPATCHER_CONTEXT,
292 personality: PersonalityFn)
293 -> EXCEPTION_DISPOSITION;