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;
26 #[cfg(target_arch = "x86")]
27 pub const unwinder_private_data_size: usize = 5;
29 #[cfg(target_arch = "x86_64")]
30 pub const unwinder_private_data_size: usize = 6;
32 #[cfg(all(target_arch = "arm", not(target_os = "ios")))]
33 pub const unwinder_private_data_size: usize = 20;
35 #[cfg(all(target_arch = "arm", target_os = "ios"))]
36 pub const unwinder_private_data_size: usize = 5;
38 #[cfg(target_arch = "aarch64")]
39 pub const unwinder_private_data_size: usize = 2;
41 #[cfg(target_arch = "mips")]
42 pub const unwinder_private_data_size: usize = 2;
44 #[cfg(target_arch = "mips64")]
45 pub const unwinder_private_data_size: usize = 2;
47 #[cfg(any(target_arch = "powerpc", target_arch = "powerpc64"))]
48 pub const unwinder_private_data_size: usize = 2;
50 #[cfg(target_arch = "s390x")]
51 pub const unwinder_private_data_size: usize = 2;
53 #[cfg(target_arch = "sparc64")]
54 pub const unwinder_private_data_size: usize = 2;
56 #[cfg(target_arch = "riscv64")]
57 pub const unwinder_private_data_size: usize = 2;
59 #[cfg(target_os = "emscripten")]
60 pub const unwinder_private_data_size: usize = 20;
62 #[cfg(all(target_arch = "hexagon", target_os = "linux"))]
63 pub const unwinder_private_data_size: usize = 35;
66 pub struct _Unwind_Exception {
67 pub exception_class: _Unwind_Exception_Class,
68 pub exception_cleanup: _Unwind_Exception_Cleanup_Fn,
69 pub private: [_Unwind_Word; unwinder_private_data_size],
72 pub enum _Unwind_Context {}
74 pub type _Unwind_Exception_Cleanup_Fn =
75 extern "C" fn(unwind_code: _Unwind_Reason_Code, exception: *mut _Unwind_Exception);
77 all(feature = "llvm-libunwind", any(target_os = "fuchsia", target_os = "linux")),
78 link(name = "unwind", kind = "static")
82 pub fn _Unwind_Resume(exception: *mut _Unwind_Exception) -> !;
83 pub fn _Unwind_DeleteException(exception: *mut _Unwind_Exception);
84 pub fn _Unwind_GetLanguageSpecificData(ctx: *mut _Unwind_Context) -> *mut c_void;
85 pub fn _Unwind_GetRegionStart(ctx: *mut _Unwind_Context) -> _Unwind_Ptr;
86 pub fn _Unwind_GetTextRelBase(ctx: *mut _Unwind_Context) -> _Unwind_Ptr;
87 pub fn _Unwind_GetDataRelBase(ctx: *mut _Unwind_Context) -> _Unwind_Ptr;
91 if #[cfg(all(any(target_os = "ios", target_os = "netbsd", not(target_arch = "arm"))))] {
94 #[derive(Copy, Clone, PartialEq)]
95 pub enum _Unwind_Action {
97 _UA_CLEANUP_PHASE = 2,
98 _UA_HANDLER_FRAME = 4,
100 _UA_END_OF_STACK = 16,
102 pub use _Unwind_Action::*;
104 #[cfg_attr(all(feature = "llvm-libunwind",
105 any(target_os = "fuchsia", target_os = "linux")),
106 link(name = "unwind", kind = "static"))]
108 pub fn _Unwind_GetGR(ctx: *mut _Unwind_Context, reg_index: c_int) -> _Unwind_Word;
109 pub fn _Unwind_SetGR(ctx: *mut _Unwind_Context, reg_index: c_int, value: _Unwind_Word);
110 pub fn _Unwind_GetIP(ctx: *mut _Unwind_Context) -> _Unwind_Word;
111 pub fn _Unwind_SetIP(ctx: *mut _Unwind_Context, value: _Unwind_Word);
112 pub fn _Unwind_GetIPInfo(ctx: *mut _Unwind_Context, ip_before_insn: *mut c_int)
114 pub fn _Unwind_FindEnclosingFunction(pc: *mut c_void) -> *mut c_void;
120 #[derive(Copy, Clone, PartialEq)]
121 pub enum _Unwind_State {
122 _US_VIRTUAL_UNWIND_FRAME = 0,
123 _US_UNWIND_FRAME_STARTING = 1,
124 _US_UNWIND_FRAME_RESUME = 2,
126 _US_FORCE_UNWIND = 8,
127 _US_END_OF_STACK = 16,
129 pub use _Unwind_State::*;
132 enum _Unwind_VRS_Result {
134 _UVRSR_NOT_IMPLEMENTED = 1,
138 enum _Unwind_VRS_RegClass {
145 use _Unwind_VRS_RegClass::*;
147 enum _Unwind_VRS_DataRepresentation {
155 use _Unwind_VRS_DataRepresentation::*;
157 pub const UNWIND_POINTER_REG: c_int = 12;
158 pub const UNWIND_IP_REG: c_int = 15;
160 #[cfg_attr(all(feature = "llvm-libunwind",
161 any(target_os = "fuchsia", target_os = "linux")),
162 link(name = "unwind", kind = "static"))]
164 fn _Unwind_VRS_Get(ctx: *mut _Unwind_Context,
165 regclass: _Unwind_VRS_RegClass,
167 repr: _Unwind_VRS_DataRepresentation,
169 -> _Unwind_VRS_Result;
171 fn _Unwind_VRS_Set(ctx: *mut _Unwind_Context,
172 regclass: _Unwind_VRS_RegClass,
174 repr: _Unwind_VRS_DataRepresentation,
176 -> _Unwind_VRS_Result;
179 // On Android or ARM/Linux, these are implemented as macros:
181 pub unsafe fn _Unwind_GetGR(ctx: *mut _Unwind_Context, reg_index: c_int) -> _Unwind_Word {
182 let mut val: _Unwind_Word = 0;
183 _Unwind_VRS_Get(ctx, _UVRSC_CORE, reg_index as _Unwind_Word, _UVRSD_UINT32,
184 &mut val as *mut _ as *mut c_void);
188 pub unsafe fn _Unwind_SetGR(ctx: *mut _Unwind_Context, reg_index: c_int, value: _Unwind_Word) {
189 let mut value = value;
190 _Unwind_VRS_Set(ctx, _UVRSC_CORE, reg_index as _Unwind_Word, _UVRSD_UINT32,
191 &mut value as *mut _ as *mut c_void);
194 pub unsafe fn _Unwind_GetIP(ctx: *mut _Unwind_Context)
196 let val = _Unwind_GetGR(ctx, UNWIND_IP_REG);
197 (val & !1) as _Unwind_Word
200 pub unsafe fn _Unwind_SetIP(ctx: *mut _Unwind_Context,
201 value: _Unwind_Word) {
202 // Propagate thumb bit to instruction pointer
203 let thumb_state = _Unwind_GetGR(ctx, UNWIND_IP_REG) & 1;
204 let value = value | thumb_state;
205 _Unwind_SetGR(ctx, UNWIND_IP_REG, value);
208 pub unsafe fn _Unwind_GetIPInfo(ctx: *mut _Unwind_Context,
209 ip_before_insn: *mut c_int)
215 // This function also doesn't exist on Android or ARM/Linux, so make it a no-op
216 pub unsafe fn _Unwind_FindEnclosingFunction(pc: *mut c_void) -> *mut c_void {
223 if #[cfg(not(all(target_os = "ios", target_arch = "arm")))] {
225 #[cfg_attr(all(feature = "llvm-libunwind",
226 any(target_os = "fuchsia", target_os = "linux")),
227 link(name = "unwind", kind = "static"))]
230 pub fn _Unwind_RaiseException(exception: *mut _Unwind_Exception) -> _Unwind_Reason_Code;
231 pub fn _Unwind_Backtrace(trace: _Unwind_Trace_Fn,
232 trace_argument: *mut c_void)
233 -> _Unwind_Reason_Code;
236 // 32-bit iOS uses SjLj and does not provide _Unwind_Backtrace()
237 #[cfg_attr(all(feature = "llvm-libunwind",
238 any(target_os = "fuchsia", target_os = "linux")),
239 link(name = "unwind", kind = "static"))]
242 pub fn _Unwind_SjLj_RaiseException(e: *mut _Unwind_Exception) -> _Unwind_Reason_Code;
246 pub unsafe fn _Unwind_RaiseException(exc: *mut _Unwind_Exception) -> _Unwind_Reason_Code {
247 _Unwind_SjLj_RaiseException(exc)
253 if #[cfg(all(windows, target_arch = "x86_64", target_env = "gnu"))] {
254 // We declare these as opaque types. This is fine since you just need to
255 // pass them to _GCC_specific_handler and forget about them.
256 pub enum EXCEPTION_RECORD {}
257 pub type LPVOID = *mut c_void;
259 pub enum DISPATCHER_CONTEXT {}
260 pub type EXCEPTION_DISPOSITION = c_int;
261 type PersonalityFn = unsafe extern "C" fn(version: c_int,
262 actions: _Unwind_Action,
263 exception_class: _Unwind_Exception_Class,
264 exception_object: *mut _Unwind_Exception,
265 context: *mut _Unwind_Context)
266 -> _Unwind_Reason_Code;
269 pub fn _GCC_specific_handler(exceptionRecord: *mut EXCEPTION_RECORD,
270 establisherFrame: LPVOID,
271 contextRecord: *mut CONTEXT,
272 dispatcherContext: *mut DISPATCHER_CONTEXT,
273 personality: PersonalityFn)
274 -> EXCEPTION_DISPOSITION;