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_os = "emscripten")]
58 pub const unwinder_private_data_size: usize = 20;
60 #[cfg(all(target_arch = "hexagon", target_os = "linux"))]
61 pub const unwinder_private_data_size: usize = 35;
64 pub struct _Unwind_Exception {
65 pub exception_class: _Unwind_Exception_Class,
66 pub exception_cleanup: _Unwind_Exception_Cleanup_Fn,
67 pub private: [_Unwind_Word; unwinder_private_data_size],
70 pub enum _Unwind_Context {}
72 pub type _Unwind_Exception_Cleanup_Fn =
73 extern "C" fn(unwind_code: _Unwind_Reason_Code, exception: *mut _Unwind_Exception);
75 all(feature = "llvm-libunwind", any(target_os = "fuchsia", target_os = "linux")),
76 link(name = "unwind", kind = "static")
80 pub fn _Unwind_Resume(exception: *mut _Unwind_Exception) -> !;
81 pub fn _Unwind_DeleteException(exception: *mut _Unwind_Exception);
82 pub fn _Unwind_GetLanguageSpecificData(ctx: *mut _Unwind_Context) -> *mut c_void;
83 pub fn _Unwind_GetRegionStart(ctx: *mut _Unwind_Context) -> _Unwind_Ptr;
84 pub fn _Unwind_GetTextRelBase(ctx: *mut _Unwind_Context) -> _Unwind_Ptr;
85 pub fn _Unwind_GetDataRelBase(ctx: *mut _Unwind_Context) -> _Unwind_Ptr;
89 if #[cfg(all(any(target_os = "ios", target_os = "netbsd", not(target_arch = "arm"))))] {
92 #[derive(Copy, Clone, PartialEq)]
93 pub enum _Unwind_Action {
95 _UA_CLEANUP_PHASE = 2,
96 _UA_HANDLER_FRAME = 4,
98 _UA_END_OF_STACK = 16,
100 pub use _Unwind_Action::*;
102 #[cfg_attr(all(feature = "llvm-libunwind",
103 any(target_os = "fuchsia", target_os = "linux")),
104 link(name = "unwind", kind = "static"))]
106 pub fn _Unwind_GetGR(ctx: *mut _Unwind_Context, reg_index: c_int) -> _Unwind_Word;
107 pub fn _Unwind_SetGR(ctx: *mut _Unwind_Context, reg_index: c_int, value: _Unwind_Word);
108 pub fn _Unwind_GetIP(ctx: *mut _Unwind_Context) -> _Unwind_Word;
109 pub fn _Unwind_SetIP(ctx: *mut _Unwind_Context, value: _Unwind_Word);
110 pub fn _Unwind_GetIPInfo(ctx: *mut _Unwind_Context, ip_before_insn: *mut c_int)
112 pub fn _Unwind_FindEnclosingFunction(pc: *mut c_void) -> *mut c_void;
118 #[derive(Copy, Clone, PartialEq)]
119 pub enum _Unwind_State {
120 _US_VIRTUAL_UNWIND_FRAME = 0,
121 _US_UNWIND_FRAME_STARTING = 1,
122 _US_UNWIND_FRAME_RESUME = 2,
124 _US_FORCE_UNWIND = 8,
125 _US_END_OF_STACK = 16,
127 pub use _Unwind_State::*;
130 enum _Unwind_VRS_Result {
132 _UVRSR_NOT_IMPLEMENTED = 1,
136 enum _Unwind_VRS_RegClass {
143 use _Unwind_VRS_RegClass::*;
145 enum _Unwind_VRS_DataRepresentation {
153 use _Unwind_VRS_DataRepresentation::*;
155 pub const UNWIND_POINTER_REG: c_int = 12;
156 pub const UNWIND_SP_REG: c_int = 13;
157 pub const UNWIND_IP_REG: c_int = 15;
159 #[cfg_attr(all(feature = "llvm-libunwind",
160 any(target_os = "fuchsia", target_os = "linux")),
161 link(name = "unwind", kind = "static"))]
163 fn _Unwind_VRS_Get(ctx: *mut _Unwind_Context,
164 regclass: _Unwind_VRS_RegClass,
166 repr: _Unwind_VRS_DataRepresentation,
168 -> _Unwind_VRS_Result;
170 fn _Unwind_VRS_Set(ctx: *mut _Unwind_Context,
171 regclass: _Unwind_VRS_RegClass,
173 repr: _Unwind_VRS_DataRepresentation,
175 -> _Unwind_VRS_Result;
178 // On Android or ARM/Linux, these are implemented as macros:
180 pub unsafe fn _Unwind_GetGR(ctx: *mut _Unwind_Context, reg_index: c_int) -> _Unwind_Word {
181 let mut val: _Unwind_Word = 0;
182 _Unwind_VRS_Get(ctx, _UVRSC_CORE, reg_index as _Unwind_Word, _UVRSD_UINT32,
183 &mut val as *mut _ as *mut c_void);
187 pub unsafe fn _Unwind_SetGR(ctx: *mut _Unwind_Context, reg_index: c_int, value: _Unwind_Word) {
188 let mut value = value;
189 _Unwind_VRS_Set(ctx, _UVRSC_CORE, reg_index as _Unwind_Word, _UVRSD_UINT32,
190 &mut value as *mut _ as *mut c_void);
193 pub unsafe fn _Unwind_GetIP(ctx: *mut _Unwind_Context)
195 let val = _Unwind_GetGR(ctx, UNWIND_IP_REG);
196 (val & !1) as _Unwind_Word
199 pub unsafe fn _Unwind_SetIP(ctx: *mut _Unwind_Context,
200 value: _Unwind_Word) {
201 // Propagate thumb bit to instruction pointer
202 let thumb_state = _Unwind_GetGR(ctx, UNWIND_IP_REG) & 1;
203 let value = value | thumb_state;
204 _Unwind_SetGR(ctx, UNWIND_IP_REG, value);
207 pub unsafe fn _Unwind_GetIPInfo(ctx: *mut _Unwind_Context,
208 ip_before_insn: *mut c_int)
214 // This function also doesn't exist on Android or ARM/Linux, so make it a no-op
215 pub unsafe fn _Unwind_FindEnclosingFunction(pc: *mut c_void) -> *mut c_void {
222 if #[cfg(not(all(target_os = "ios", target_arch = "arm")))] {
224 #[cfg_attr(all(feature = "llvm-libunwind",
225 any(target_os = "fuchsia", target_os = "linux")),
226 link(name = "unwind", kind = "static"))]
229 pub fn _Unwind_RaiseException(exception: *mut _Unwind_Exception) -> _Unwind_Reason_Code;
230 pub fn _Unwind_Backtrace(trace: _Unwind_Trace_Fn,
231 trace_argument: *mut c_void)
232 -> _Unwind_Reason_Code;
235 // 32-bit iOS uses SjLj and does not provide _Unwind_Backtrace()
236 #[cfg_attr(all(feature = "llvm-libunwind",
237 any(target_os = "fuchsia", target_os = "linux")),
238 link(name = "unwind", kind = "static"))]
241 pub fn _Unwind_SjLj_RaiseException(e: *mut _Unwind_Exception) -> _Unwind_Reason_Code;
245 pub unsafe fn _Unwind_RaiseException(exc: *mut _Unwind_Exception) -> _Unwind_Reason_Code {
246 _Unwind_SjLj_RaiseException(exc)
252 if #[cfg(all(windows, target_arch = "x86_64", target_env = "gnu"))] {
253 // We declare these as opaque types. This is fine since you just need to
254 // pass them to _GCC_specific_handler and forget about them.
255 pub enum EXCEPTION_RECORD {}
256 pub type LPVOID = *mut c_void;
258 pub enum DISPATCHER_CONTEXT {}
259 pub type EXCEPTION_DISPOSITION = c_int;
260 type PersonalityFn = unsafe extern "C" fn(version: c_int,
261 actions: _Unwind_Action,
262 exception_class: _Unwind_Exception_Class,
263 exception_object: *mut _Unwind_Exception,
264 context: *mut _Unwind_Context)
265 -> _Unwind_Reason_Code;
268 pub fn _GCC_specific_handler(exceptionRecord: *mut EXCEPTION_RECORD,
269 establisherFrame: LPVOID,
270 contextRecord: *mut CONTEXT,
271 dispatcherContext: *mut DISPATCHER_CONTEXT,
272 personality: PersonalityFn)
273 -> EXCEPTION_DISPOSITION;