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(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 = "mips")]
46 pub const unwinder_private_data_size: usize = 2;
48 #[cfg(target_arch = "mips64")]
49 pub const unwinder_private_data_size: usize = 2;
51 #[cfg(any(target_arch = "powerpc", target_arch = "powerpc64"))]
52 pub const unwinder_private_data_size: usize = 2;
54 #[cfg(target_arch = "s390x")]
55 pub const unwinder_private_data_size: usize = 2;
57 #[cfg(any(target_arch = "sparc", target_arch = "sparc64"))]
58 pub const unwinder_private_data_size: usize = 2;
60 #[cfg(any(target_arch = "riscv64", target_arch = "riscv32"))]
61 pub const unwinder_private_data_size: usize = 2;
63 #[cfg(target_os = "emscripten")]
64 pub const unwinder_private_data_size: usize = 20;
66 #[cfg(all(target_arch = "hexagon", target_os = "linux"))]
67 pub const unwinder_private_data_size: usize = 35;
70 pub struct _Unwind_Exception {
71 pub exception_class: _Unwind_Exception_Class,
72 pub exception_cleanup: _Unwind_Exception_Cleanup_Fn,
73 pub private: [_Unwind_Word; unwinder_private_data_size],
76 pub enum _Unwind_Context {}
78 pub type _Unwind_Exception_Cleanup_Fn =
79 extern "C" fn(unwind_code: _Unwind_Reason_Code, exception: *mut _Unwind_Exception);
81 all(feature = "llvm-libunwind", any(target_os = "fuchsia", target_os = "linux")),
82 link(name = "unwind", kind = "static")
85 pub fn _Unwind_Resume(exception: *mut _Unwind_Exception) -> !;
88 pub fn _Unwind_DeleteException(exception: *mut _Unwind_Exception);
89 pub fn _Unwind_GetLanguageSpecificData(ctx: *mut _Unwind_Context) -> *mut c_void;
90 pub fn _Unwind_GetRegionStart(ctx: *mut _Unwind_Context) -> _Unwind_Ptr;
91 pub fn _Unwind_GetTextRelBase(ctx: *mut _Unwind_Context) -> _Unwind_Ptr;
92 pub fn _Unwind_GetDataRelBase(ctx: *mut _Unwind_Context) -> _Unwind_Ptr;
96 if #[cfg(any(target_os = "ios", target_os = "netbsd", not(target_arch = "arm")))] {
99 #[derive(Copy, Clone, PartialEq)]
100 pub enum _Unwind_Action {
101 _UA_SEARCH_PHASE = 1,
102 _UA_CLEANUP_PHASE = 2,
103 _UA_HANDLER_FRAME = 4,
104 _UA_FORCE_UNWIND = 8,
105 _UA_END_OF_STACK = 16,
107 pub use _Unwind_Action::*;
109 #[cfg_attr(all(feature = "llvm-libunwind",
110 any(target_os = "fuchsia", target_os = "linux")),
111 link(name = "unwind", kind = "static"))]
113 pub fn _Unwind_GetGR(ctx: *mut _Unwind_Context, reg_index: c_int) -> _Unwind_Word;
114 pub fn _Unwind_SetGR(ctx: *mut _Unwind_Context, reg_index: c_int, value: _Unwind_Word);
115 pub fn _Unwind_GetIP(ctx: *mut _Unwind_Context) -> _Unwind_Word;
116 pub fn _Unwind_SetIP(ctx: *mut _Unwind_Context, value: _Unwind_Word);
117 pub fn _Unwind_GetIPInfo(ctx: *mut _Unwind_Context, ip_before_insn: *mut c_int)
119 pub fn _Unwind_FindEnclosingFunction(pc: *mut c_void) -> *mut c_void;
125 #[derive(Copy, Clone, PartialEq)]
126 pub enum _Unwind_State {
127 _US_VIRTUAL_UNWIND_FRAME = 0,
128 _US_UNWIND_FRAME_STARTING = 1,
129 _US_UNWIND_FRAME_RESUME = 2,
131 _US_FORCE_UNWIND = 8,
132 _US_END_OF_STACK = 16,
134 pub use _Unwind_State::*;
137 enum _Unwind_VRS_Result {
139 _UVRSR_NOT_IMPLEMENTED = 1,
143 enum _Unwind_VRS_RegClass {
150 use _Unwind_VRS_RegClass::*;
152 enum _Unwind_VRS_DataRepresentation {
160 use _Unwind_VRS_DataRepresentation::*;
162 pub const UNWIND_POINTER_REG: c_int = 12;
163 pub const UNWIND_SP_REG: c_int = 13;
164 pub const UNWIND_IP_REG: c_int = 15;
166 #[cfg_attr(all(feature = "llvm-libunwind",
167 any(target_os = "fuchsia", target_os = "linux")),
168 link(name = "unwind", kind = "static"))]
170 fn _Unwind_VRS_Get(ctx: *mut _Unwind_Context,
171 regclass: _Unwind_VRS_RegClass,
173 repr: _Unwind_VRS_DataRepresentation,
175 -> _Unwind_VRS_Result;
177 fn _Unwind_VRS_Set(ctx: *mut _Unwind_Context,
178 regclass: _Unwind_VRS_RegClass,
180 repr: _Unwind_VRS_DataRepresentation,
182 -> _Unwind_VRS_Result;
185 // On Android or ARM/Linux, these are implemented as macros:
187 pub unsafe fn _Unwind_GetGR(ctx: *mut _Unwind_Context, reg_index: c_int) -> _Unwind_Word {
188 let mut val: _Unwind_Word = 0;
189 _Unwind_VRS_Get(ctx, _UVRSC_CORE, reg_index as _Unwind_Word, _UVRSD_UINT32,
190 &mut val as *mut _ as *mut c_void);
194 pub unsafe fn _Unwind_SetGR(ctx: *mut _Unwind_Context, reg_index: c_int, value: _Unwind_Word) {
195 let mut value = value;
196 _Unwind_VRS_Set(ctx, _UVRSC_CORE, reg_index as _Unwind_Word, _UVRSD_UINT32,
197 &mut value as *mut _ as *mut c_void);
200 pub unsafe fn _Unwind_GetIP(ctx: *mut _Unwind_Context)
202 let val = _Unwind_GetGR(ctx, UNWIND_IP_REG);
203 (val & !1) as _Unwind_Word
206 pub unsafe fn _Unwind_SetIP(ctx: *mut _Unwind_Context,
207 value: _Unwind_Word) {
208 // Propagate thumb bit to instruction pointer
209 let thumb_state = _Unwind_GetGR(ctx, UNWIND_IP_REG) & 1;
210 let value = value | thumb_state;
211 _Unwind_SetGR(ctx, UNWIND_IP_REG, value);
214 pub unsafe fn _Unwind_GetIPInfo(ctx: *mut _Unwind_Context,
215 ip_before_insn: *mut c_int)
221 // This function also doesn't exist on Android or ARM/Linux, so make it a no-op
222 pub unsafe fn _Unwind_FindEnclosingFunction(pc: *mut c_void) -> *mut c_void {
229 if #[cfg(not(all(target_os = "ios", target_arch = "arm")))] {
231 #[cfg_attr(all(feature = "llvm-libunwind",
232 any(target_os = "fuchsia", target_os = "linux")),
233 link(name = "unwind", kind = "static"))]
235 pub fn _Unwind_RaiseException(exception: *mut _Unwind_Exception) -> _Unwind_Reason_Code;
238 pub fn _Unwind_Backtrace(trace: _Unwind_Trace_Fn,
239 trace_argument: *mut c_void)
240 -> _Unwind_Reason_Code;
243 // 32-bit iOS uses SjLj and does not provide _Unwind_Backtrace()
244 #[cfg_attr(all(feature = "llvm-libunwind",
245 any(target_os = "fuchsia", target_os = "linux")),
246 link(name = "unwind", kind = "static"))]
248 pub fn _Unwind_SjLj_RaiseException(e: *mut _Unwind_Exception) -> _Unwind_Reason_Code;
252 pub unsafe fn _Unwind_RaiseException(exc: *mut _Unwind_Exception) -> _Unwind_Reason_Code {
253 _Unwind_SjLj_RaiseException(exc)
259 if #[cfg(all(windows, target_arch = "x86_64", target_env = "gnu"))] {
260 // We declare these as opaque types. This is fine since you just need to
261 // pass them to _GCC_specific_handler and forget about them.
262 pub enum EXCEPTION_RECORD {}
263 pub type LPVOID = *mut c_void;
265 pub enum DISPATCHER_CONTEXT {}
266 pub type EXCEPTION_DISPOSITION = c_int;
267 type PersonalityFn = unsafe extern "C" fn(version: c_int,
268 actions: _Unwind_Action,
269 exception_class: _Unwind_Exception_Class,
270 exception_object: *mut _Unwind_Exception,
271 context: *mut _Unwind_Context)
272 -> _Unwind_Reason_Code;
275 pub fn _GCC_specific_handler(exceptionRecord: *mut EXCEPTION_RECORD,
276 establisherFrame: LPVOID,
277 contextRecord: *mut CONTEXT,
278 dispatcherContext: *mut DISPATCHER_CONTEXT,
279 personality: PersonalityFn)
280 -> EXCEPTION_DISPOSITION;