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(target_os = "ios")))]
34 pub const unwinder_private_data_size: usize = 20;
36 #[cfg(all(target_arch = "arm", target_os = "ios"))]
37 pub const unwinder_private_data_size: usize = 5;
39 #[cfg(target_arch = "aarch64")]
40 pub const unwinder_private_data_size: usize = 2;
42 #[cfg(target_arch = "mips")]
43 pub const unwinder_private_data_size: usize = 2;
45 #[cfg(target_arch = "mips64")]
46 pub const unwinder_private_data_size: usize = 2;
48 #[cfg(any(target_arch = "powerpc", target_arch = "powerpc64"))]
49 pub const unwinder_private_data_size: usize = 2;
51 #[cfg(target_arch = "s390x")]
52 pub const unwinder_private_data_size: usize = 2;
54 #[cfg(target_arch = "sparc64")]
55 pub const unwinder_private_data_size: usize = 2;
57 #[cfg(target_arch = "riscv64")]
58 pub const unwinder_private_data_size: usize = 2;
60 #[cfg(target_os = "emscripten")]
61 pub const unwinder_private_data_size: usize = 20;
63 #[cfg(all(target_arch = "hexagon", target_os = "linux"))]
64 pub const unwinder_private_data_size: usize = 35;
67 pub struct _Unwind_Exception {
68 pub exception_class: _Unwind_Exception_Class,
69 pub exception_cleanup: _Unwind_Exception_Cleanup_Fn,
70 pub private: [_Unwind_Word; unwinder_private_data_size],
73 pub enum _Unwind_Context {}
75 pub type _Unwind_Exception_Cleanup_Fn =
76 extern "C" fn(unwind_code: _Unwind_Reason_Code, exception: *mut _Unwind_Exception);
78 all(feature = "llvm-libunwind", any(target_os = "fuchsia", target_os = "linux")),
79 link(name = "unwind", kind = "static")
83 pub fn _Unwind_Resume(exception: *mut _Unwind_Exception) -> !;
84 pub fn _Unwind_DeleteException(exception: *mut _Unwind_Exception);
85 pub fn _Unwind_GetLanguageSpecificData(ctx: *mut _Unwind_Context) -> *mut c_void;
86 pub fn _Unwind_GetRegionStart(ctx: *mut _Unwind_Context) -> _Unwind_Ptr;
87 pub fn _Unwind_GetTextRelBase(ctx: *mut _Unwind_Context) -> _Unwind_Ptr;
88 pub fn _Unwind_GetDataRelBase(ctx: *mut _Unwind_Context) -> _Unwind_Ptr;
92 if #[cfg(all(any(target_os = "ios", target_os = "netbsd", not(target_arch = "arm"))))] {
95 #[derive(Copy, Clone, PartialEq)]
96 pub enum _Unwind_Action {
98 _UA_CLEANUP_PHASE = 2,
99 _UA_HANDLER_FRAME = 4,
100 _UA_FORCE_UNWIND = 8,
101 _UA_END_OF_STACK = 16,
103 pub use _Unwind_Action::*;
105 #[cfg_attr(all(feature = "llvm-libunwind",
106 any(target_os = "fuchsia", target_os = "linux")),
107 link(name = "unwind", kind = "static"))]
109 pub fn _Unwind_GetGR(ctx: *mut _Unwind_Context, reg_index: c_int) -> _Unwind_Word;
110 pub fn _Unwind_SetGR(ctx: *mut _Unwind_Context, reg_index: c_int, value: _Unwind_Word);
111 pub fn _Unwind_GetIP(ctx: *mut _Unwind_Context) -> _Unwind_Word;
112 pub fn _Unwind_SetIP(ctx: *mut _Unwind_Context, value: _Unwind_Word);
113 pub fn _Unwind_GetIPInfo(ctx: *mut _Unwind_Context, ip_before_insn: *mut c_int)
115 pub fn _Unwind_FindEnclosingFunction(pc: *mut c_void) -> *mut c_void;
121 #[derive(Copy, Clone, PartialEq)]
122 pub enum _Unwind_State {
123 _US_VIRTUAL_UNWIND_FRAME = 0,
124 _US_UNWIND_FRAME_STARTING = 1,
125 _US_UNWIND_FRAME_RESUME = 2,
127 _US_FORCE_UNWIND = 8,
128 _US_END_OF_STACK = 16,
130 pub use _Unwind_State::*;
133 enum _Unwind_VRS_Result {
135 _UVRSR_NOT_IMPLEMENTED = 1,
139 enum _Unwind_VRS_RegClass {
146 use _Unwind_VRS_RegClass::*;
148 enum _Unwind_VRS_DataRepresentation {
156 use _Unwind_VRS_DataRepresentation::*;
158 pub const UNWIND_POINTER_REG: c_int = 12;
159 pub const UNWIND_SP_REG: c_int = 13;
160 pub const UNWIND_IP_REG: c_int = 15;
162 #[cfg_attr(all(feature = "llvm-libunwind",
163 any(target_os = "fuchsia", target_os = "linux")),
164 link(name = "unwind", kind = "static"))]
166 fn _Unwind_VRS_Get(ctx: *mut _Unwind_Context,
167 regclass: _Unwind_VRS_RegClass,
169 repr: _Unwind_VRS_DataRepresentation,
171 -> _Unwind_VRS_Result;
173 fn _Unwind_VRS_Set(ctx: *mut _Unwind_Context,
174 regclass: _Unwind_VRS_RegClass,
176 repr: _Unwind_VRS_DataRepresentation,
178 -> _Unwind_VRS_Result;
181 // On Android or ARM/Linux, these are implemented as macros:
183 pub unsafe fn _Unwind_GetGR(ctx: *mut _Unwind_Context, reg_index: c_int) -> _Unwind_Word {
184 let mut val: _Unwind_Word = 0;
185 _Unwind_VRS_Get(ctx, _UVRSC_CORE, reg_index as _Unwind_Word, _UVRSD_UINT32,
186 &mut val as *mut _ as *mut c_void);
190 pub unsafe fn _Unwind_SetGR(ctx: *mut _Unwind_Context, reg_index: c_int, value: _Unwind_Word) {
191 let mut value = value;
192 _Unwind_VRS_Set(ctx, _UVRSC_CORE, reg_index as _Unwind_Word, _UVRSD_UINT32,
193 &mut value as *mut _ as *mut c_void);
196 pub unsafe fn _Unwind_GetIP(ctx: *mut _Unwind_Context)
198 let val = _Unwind_GetGR(ctx, UNWIND_IP_REG);
199 (val & !1) as _Unwind_Word
202 pub unsafe fn _Unwind_SetIP(ctx: *mut _Unwind_Context,
203 value: _Unwind_Word) {
204 // Propagate thumb bit to instruction pointer
205 let thumb_state = _Unwind_GetGR(ctx, UNWIND_IP_REG) & 1;
206 let value = value | thumb_state;
207 _Unwind_SetGR(ctx, UNWIND_IP_REG, value);
210 pub unsafe fn _Unwind_GetIPInfo(ctx: *mut _Unwind_Context,
211 ip_before_insn: *mut c_int)
217 // This function also doesn't exist on Android or ARM/Linux, so make it a no-op
218 pub unsafe fn _Unwind_FindEnclosingFunction(pc: *mut c_void) -> *mut c_void {
225 if #[cfg(not(all(target_os = "ios", target_arch = "arm")))] {
227 #[cfg_attr(all(feature = "llvm-libunwind",
228 any(target_os = "fuchsia", target_os = "linux")),
229 link(name = "unwind", kind = "static"))]
232 pub fn _Unwind_RaiseException(exception: *mut _Unwind_Exception) -> _Unwind_Reason_Code;
233 pub fn _Unwind_Backtrace(trace: _Unwind_Trace_Fn,
234 trace_argument: *mut c_void)
235 -> _Unwind_Reason_Code;
238 // 32-bit iOS uses SjLj and does not provide _Unwind_Backtrace()
239 #[cfg_attr(all(feature = "llvm-libunwind",
240 any(target_os = "fuchsia", target_os = "linux")),
241 link(name = "unwind", kind = "static"))]
244 pub fn _Unwind_SjLj_RaiseException(e: *mut _Unwind_Exception) -> _Unwind_Reason_Code;
248 pub unsafe fn _Unwind_RaiseException(exc: *mut _Unwind_Exception) -> _Unwind_Reason_Code {
249 _Unwind_SjLj_RaiseException(exc)
255 if #[cfg(all(windows, target_arch = "x86_64", target_env = "gnu"))] {
256 // We declare these as opaque types. This is fine since you just need to
257 // pass them to _GCC_specific_handler and forget about them.
258 pub enum EXCEPTION_RECORD {}
259 pub type LPVOID = *mut c_void;
261 pub enum DISPATCHER_CONTEXT {}
262 pub type EXCEPTION_DISPOSITION = c_int;
263 type PersonalityFn = unsafe extern "C" fn(version: c_int,
264 actions: _Unwind_Action,
265 exception_class: _Unwind_Exception_Class,
266 exception_object: *mut _Unwind_Exception,
267 context: *mut _Unwind_Context)
268 -> _Unwind_Reason_Code;
271 pub fn _GCC_specific_handler(exceptionRecord: *mut EXCEPTION_RECORD,
272 establisherFrame: LPVOID,
273 contextRecord: *mut CONTEXT,
274 dispatcherContext: *mut DISPATCHER_CONTEXT,
275 personality: PersonalityFn)
276 -> EXCEPTION_DISPOSITION;