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 = extern "C" fn(ctx: *mut _Unwind_Context, arg: *mut c_void)
25 -> _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_os = "emscripten")]
57 pub const unwinder_private_data_size: usize = 20;
59 #[cfg(all(target_arch = "hexagon", target_os = "linux"))]
60 pub const unwinder_private_data_size: usize = 35;
63 pub struct _Unwind_Exception {
64 pub exception_class: _Unwind_Exception_Class,
65 pub exception_cleanup: _Unwind_Exception_Cleanup_Fn,
66 pub private: [_Unwind_Word; unwinder_private_data_size],
69 pub enum _Unwind_Context {}
71 pub type _Unwind_Exception_Cleanup_Fn = extern "C" fn(unwind_code: _Unwind_Reason_Code,
72 exception: *mut _Unwind_Exception);
73 #[cfg_attr(all(not(bootstrap), feature = "llvm-libunwind",
74 any(target_os = "fuchsia", target_os = "linux")),
75 link(name = "unwind", kind = "static"))]
78 pub fn _Unwind_Resume(exception: *mut _Unwind_Exception) -> !;
79 pub fn _Unwind_DeleteException(exception: *mut _Unwind_Exception);
80 pub fn _Unwind_GetLanguageSpecificData(ctx: *mut _Unwind_Context) -> *mut c_void;
81 pub fn _Unwind_GetRegionStart(ctx: *mut _Unwind_Context) -> _Unwind_Ptr;
82 pub fn _Unwind_GetTextRelBase(ctx: *mut _Unwind_Context) -> _Unwind_Ptr;
83 pub fn _Unwind_GetDataRelBase(ctx: *mut _Unwind_Context) -> _Unwind_Ptr;
87 if #[cfg(all(any(target_os = "ios", target_os = "netbsd", not(target_arch = "arm"))))] {
90 #[derive(Copy, Clone, PartialEq)]
91 pub enum _Unwind_Action {
93 _UA_CLEANUP_PHASE = 2,
94 _UA_HANDLER_FRAME = 4,
96 _UA_END_OF_STACK = 16,
98 pub use _Unwind_Action::*;
100 #[cfg_attr(all(not(bootstrap), feature = "llvm-libunwind",
101 any(target_os = "fuchsia", target_os = "linux")),
102 link(name = "unwind", kind = "static"))]
104 pub fn _Unwind_GetGR(ctx: *mut _Unwind_Context, reg_index: c_int) -> _Unwind_Word;
105 pub fn _Unwind_SetGR(ctx: *mut _Unwind_Context, reg_index: c_int, value: _Unwind_Word);
106 pub fn _Unwind_GetIP(ctx: *mut _Unwind_Context) -> _Unwind_Word;
107 pub fn _Unwind_SetIP(ctx: *mut _Unwind_Context, value: _Unwind_Word);
108 pub fn _Unwind_GetIPInfo(ctx: *mut _Unwind_Context, ip_before_insn: *mut c_int)
110 pub fn _Unwind_FindEnclosingFunction(pc: *mut c_void) -> *mut c_void;
116 #[derive(Copy, Clone, PartialEq)]
117 pub enum _Unwind_State {
118 _US_VIRTUAL_UNWIND_FRAME = 0,
119 _US_UNWIND_FRAME_STARTING = 1,
120 _US_UNWIND_FRAME_RESUME = 2,
122 _US_FORCE_UNWIND = 8,
123 _US_END_OF_STACK = 16,
125 pub use _Unwind_State::*;
128 enum _Unwind_VRS_Result {
130 _UVRSR_NOT_IMPLEMENTED = 1,
134 enum _Unwind_VRS_RegClass {
141 use _Unwind_VRS_RegClass::*;
143 enum _Unwind_VRS_DataRepresentation {
151 use _Unwind_VRS_DataRepresentation::*;
153 pub const UNWIND_POINTER_REG: c_int = 12;
154 pub const UNWIND_IP_REG: c_int = 15;
156 #[cfg_attr(all(not(bootstrap), feature = "llvm-libunwind",
157 any(target_os = "fuchsia", target_os = "linux")),
158 link(name = "unwind", kind = "static"))]
160 fn _Unwind_VRS_Get(ctx: *mut _Unwind_Context,
161 regclass: _Unwind_VRS_RegClass,
163 repr: _Unwind_VRS_DataRepresentation,
165 -> _Unwind_VRS_Result;
167 fn _Unwind_VRS_Set(ctx: *mut _Unwind_Context,
168 regclass: _Unwind_VRS_RegClass,
170 repr: _Unwind_VRS_DataRepresentation,
172 -> _Unwind_VRS_Result;
175 // On Android or ARM/Linux, these are implemented as macros:
177 pub unsafe fn _Unwind_GetGR(ctx: *mut _Unwind_Context, reg_index: c_int) -> _Unwind_Word {
178 let mut val: _Unwind_Word = 0;
179 _Unwind_VRS_Get(ctx, _UVRSC_CORE, reg_index as _Unwind_Word, _UVRSD_UINT32,
180 &mut val as *mut _ as *mut c_void);
184 pub unsafe fn _Unwind_SetGR(ctx: *mut _Unwind_Context, reg_index: c_int, value: _Unwind_Word) {
185 let mut value = value;
186 _Unwind_VRS_Set(ctx, _UVRSC_CORE, reg_index as _Unwind_Word, _UVRSD_UINT32,
187 &mut value as *mut _ as *mut c_void);
190 pub unsafe fn _Unwind_GetIP(ctx: *mut _Unwind_Context)
192 let val = _Unwind_GetGR(ctx, UNWIND_IP_REG);
193 (val & !1) as _Unwind_Word
196 pub unsafe fn _Unwind_SetIP(ctx: *mut _Unwind_Context,
197 value: _Unwind_Word) {
198 // Propagate thumb bit to instruction pointer
199 let thumb_state = _Unwind_GetGR(ctx, UNWIND_IP_REG) & 1;
200 let value = value | thumb_state;
201 _Unwind_SetGR(ctx, UNWIND_IP_REG, value);
204 pub unsafe fn _Unwind_GetIPInfo(ctx: *mut _Unwind_Context,
205 ip_before_insn: *mut c_int)
211 // This function also doesn't exist on Android or ARM/Linux, so make it a no-op
212 pub unsafe fn _Unwind_FindEnclosingFunction(pc: *mut c_void) -> *mut c_void {
219 if #[cfg(not(all(target_os = "ios", target_arch = "arm")))] {
221 #[cfg_attr(all(not(bootstrap), feature = "llvm-libunwind",
222 any(target_os = "fuchsia", target_os = "linux")),
223 link(name = "unwind", kind = "static"))]
226 pub fn _Unwind_RaiseException(exception: *mut _Unwind_Exception) -> _Unwind_Reason_Code;
227 pub fn _Unwind_Backtrace(trace: _Unwind_Trace_Fn,
228 trace_argument: *mut c_void)
229 -> _Unwind_Reason_Code;
232 // 32-bit iOS uses SjLj and does not provide _Unwind_Backtrace()
233 #[cfg_attr(all(not(bootstrap), feature = "llvm-libunwind",
234 any(target_os = "fuchsia", target_os = "linux")),
235 link(name = "unwind", kind = "static"))]
238 pub fn _Unwind_SjLj_RaiseException(e: *mut _Unwind_Exception) -> _Unwind_Reason_Code;
242 pub unsafe fn _Unwind_RaiseException(exc: *mut _Unwind_Exception) -> _Unwind_Reason_Code {
243 _Unwind_SjLj_RaiseException(exc)