diff options
Diffstat (limited to 'library/unwind/src/libunwind.rs')
| -rw-r--r-- | library/unwind/src/libunwind.rs | 353 |
1 files changed, 180 insertions, 173 deletions
diff --git a/library/unwind/src/libunwind.rs b/library/unwind/src/libunwind.rs index b350003cbb1..9ac9b54ed4a 100644 --- a/library/unwind/src/libunwind.rs +++ b/library/unwind/src/libunwind.rs @@ -122,198 +122,205 @@ unsafe extern "C" { pub fn _Unwind_GetDataRelBase(ctx: *mut _Unwind_Context) -> _Unwind_Ptr; } -cfg_if::cfg_if! { -if #[cfg(any(target_vendor = "apple", target_os = "netbsd", not(target_arch = "arm")))] { - // Not ARM EHABI - // - // 32-bit ARM on iOS/tvOS/watchOS use either DWARF/Compact unwinding or - // "setjmp-longjmp" / SjLj unwinding. - pub type _Unwind_Action = c_int; - - pub const _UA_SEARCH_PHASE: c_int = 1; - pub const _UA_CLEANUP_PHASE: c_int = 2; - pub const _UA_HANDLER_FRAME: c_int = 4; - pub const _UA_FORCE_UNWIND: c_int = 8; - pub const _UA_END_OF_STACK: c_int = 16; - - #[cfg_attr( - all(feature = "llvm-libunwind", any(target_os = "fuchsia", target_os = "linux", target_os = "xous")), - link(name = "unwind", kind = "static", modifiers = "-bundle") - )] - unsafe extern "C" { - pub fn _Unwind_GetGR(ctx: *mut _Unwind_Context, reg_index: c_int) -> _Unwind_Word; - pub fn _Unwind_SetGR(ctx: *mut _Unwind_Context, reg_index: c_int, value: _Unwind_Word); - pub fn _Unwind_GetIP(ctx: *mut _Unwind_Context) -> _Unwind_Word; - pub fn _Unwind_SetIP(ctx: *mut _Unwind_Context, value: _Unwind_Word); - pub fn _Unwind_GetIPInfo(ctx: *mut _Unwind_Context, ip_before_insn: *mut c_int) - -> _Unwind_Word; - pub fn _Unwind_FindEnclosingFunction(pc: *mut c_void) -> *mut c_void; - } +cfg_select! { + any(target_vendor = "apple", target_os = "netbsd", not(target_arch = "arm")) => { + // Not ARM EHABI + // + // 32-bit ARM on iOS/tvOS/watchOS use either DWARF/Compact unwinding or + // "setjmp-longjmp" / SjLj unwinding. + pub type _Unwind_Action = c_int; + + pub const _UA_SEARCH_PHASE: c_int = 1; + pub const _UA_CLEANUP_PHASE: c_int = 2; + pub const _UA_HANDLER_FRAME: c_int = 4; + pub const _UA_FORCE_UNWIND: c_int = 8; + pub const _UA_END_OF_STACK: c_int = 16; + + #[cfg_attr( + all(feature = "llvm-libunwind", any(target_os = "fuchsia", target_os = "linux", target_os = "xous")), + link(name = "unwind", kind = "static", modifiers = "-bundle") + )] + unsafe extern "C" { + pub fn _Unwind_GetGR(ctx: *mut _Unwind_Context, reg_index: c_int) -> _Unwind_Word; + pub fn _Unwind_SetGR(ctx: *mut _Unwind_Context, reg_index: c_int, value: _Unwind_Word); + pub fn _Unwind_GetIP(ctx: *mut _Unwind_Context) -> _Unwind_Word; + pub fn _Unwind_SetIP(ctx: *mut _Unwind_Context, value: _Unwind_Word); + pub fn _Unwind_GetIPInfo(ctx: *mut _Unwind_Context, ip_before_insn: *mut c_int) + -> _Unwind_Word; + pub fn _Unwind_FindEnclosingFunction(pc: *mut c_void) -> *mut c_void; + } -} else { - // ARM EHABI - #[repr(C)] - #[derive(Copy, Clone, PartialEq)] - pub enum _Unwind_State { - _US_VIRTUAL_UNWIND_FRAME = 0, - _US_UNWIND_FRAME_STARTING = 1, - _US_UNWIND_FRAME_RESUME = 2, - _US_ACTION_MASK = 3, - _US_FORCE_UNWIND = 8, - _US_END_OF_STACK = 16, } - pub use _Unwind_State::*; + _ => { + // ARM EHABI + #[repr(C)] + #[derive(Copy, Clone, PartialEq)] + pub enum _Unwind_State { + _US_VIRTUAL_UNWIND_FRAME = 0, + _US_UNWIND_FRAME_STARTING = 1, + _US_UNWIND_FRAME_RESUME = 2, + _US_ACTION_MASK = 3, + _US_FORCE_UNWIND = 8, + _US_END_OF_STACK = 16, + } + pub use _Unwind_State::*; - #[repr(C)] - enum _Unwind_VRS_Result { - _UVRSR_OK = 0, - _UVRSR_NOT_IMPLEMENTED = 1, - _UVRSR_FAILED = 2, - } - #[repr(C)] - enum _Unwind_VRS_RegClass { - _UVRSC_CORE = 0, - _UVRSC_VFP = 1, - _UVRSC_FPA = 2, - _UVRSC_WMMXD = 3, - _UVRSC_WMMXC = 4, - } - use _Unwind_VRS_RegClass::*; - #[repr(C)] - enum _Unwind_VRS_DataRepresentation { - _UVRSD_UINT32 = 0, - _UVRSD_VFPX = 1, - _UVRSD_FPAX = 2, - _UVRSD_UINT64 = 3, - _UVRSD_FLOAT = 4, - _UVRSD_DOUBLE = 5, - } - use _Unwind_VRS_DataRepresentation::*; - - pub const UNWIND_POINTER_REG: c_int = 12; - pub const UNWIND_SP_REG: c_int = 13; - pub const UNWIND_IP_REG: c_int = 15; - - #[cfg_attr( - all(feature = "llvm-libunwind", any(target_os = "fuchsia", target_os = "linux", target_os = "xous")), - link(name = "unwind", kind = "static", modifiers = "-bundle") - )] - unsafe extern "C" { - fn _Unwind_VRS_Get(ctx: *mut _Unwind_Context, - regclass: _Unwind_VRS_RegClass, - regno: _Unwind_Word, - repr: _Unwind_VRS_DataRepresentation, - data: *mut c_void) - -> _Unwind_VRS_Result; - - fn _Unwind_VRS_Set(ctx: *mut _Unwind_Context, - regclass: _Unwind_VRS_RegClass, - regno: _Unwind_Word, - repr: _Unwind_VRS_DataRepresentation, - data: *mut c_void) - -> _Unwind_VRS_Result; - } + #[repr(C)] + enum _Unwind_VRS_Result { + _UVRSR_OK = 0, + _UVRSR_NOT_IMPLEMENTED = 1, + _UVRSR_FAILED = 2, + } + #[repr(C)] + enum _Unwind_VRS_RegClass { + _UVRSC_CORE = 0, + _UVRSC_VFP = 1, + _UVRSC_FPA = 2, + _UVRSC_WMMXD = 3, + _UVRSC_WMMXC = 4, + } + use _Unwind_VRS_RegClass::*; + #[repr(C)] + enum _Unwind_VRS_DataRepresentation { + _UVRSD_UINT32 = 0, + _UVRSD_VFPX = 1, + _UVRSD_FPAX = 2, + _UVRSD_UINT64 = 3, + _UVRSD_FLOAT = 4, + _UVRSD_DOUBLE = 5, + } + use _Unwind_VRS_DataRepresentation::*; + + pub const UNWIND_POINTER_REG: c_int = 12; + pub const UNWIND_SP_REG: c_int = 13; + pub const UNWIND_IP_REG: c_int = 15; + + #[cfg_attr( + all(feature = "llvm-libunwind", any(target_os = "fuchsia", target_os = "linux", target_os = "xous")), + link(name = "unwind", kind = "static", modifiers = "-bundle") + )] + unsafe extern "C" { + fn _Unwind_VRS_Get(ctx: *mut _Unwind_Context, + regclass: _Unwind_VRS_RegClass, + regno: _Unwind_Word, + repr: _Unwind_VRS_DataRepresentation, + data: *mut c_void) + -> _Unwind_VRS_Result; + + fn _Unwind_VRS_Set(ctx: *mut _Unwind_Context, + regclass: _Unwind_VRS_RegClass, + regno: _Unwind_Word, + repr: _Unwind_VRS_DataRepresentation, + data: *mut c_void) + -> _Unwind_VRS_Result; + } - // On Android or ARM/Linux, these are implemented as macros: + // On Android or ARM/Linux, these are implemented as macros: - pub unsafe fn _Unwind_GetGR(ctx: *mut _Unwind_Context, reg_index: c_int) -> _Unwind_Word { - let mut val: _Unwind_Word = core::ptr::null(); - unsafe { _Unwind_VRS_Get(ctx, _UVRSC_CORE, reg_index as _Unwind_Word, _UVRSD_UINT32, - (&raw mut val) as *mut c_void); } - val - } + pub unsafe fn _Unwind_GetGR(ctx: *mut _Unwind_Context, reg_index: c_int) -> _Unwind_Word { + let mut val: _Unwind_Word = core::ptr::null(); + unsafe { _Unwind_VRS_Get(ctx, _UVRSC_CORE, reg_index as _Unwind_Word, _UVRSD_UINT32, + (&raw mut val) as *mut c_void); } + val + } - pub unsafe fn _Unwind_SetGR(ctx: *mut _Unwind_Context, reg_index: c_int, value: _Unwind_Word) { - let mut value = value; - unsafe { _Unwind_VRS_Set(ctx, _UVRSC_CORE, reg_index as _Unwind_Word, _UVRSD_UINT32, - (&raw mut value) as *mut c_void); } - } + pub unsafe fn _Unwind_SetGR( + ctx: *mut _Unwind_Context, + reg_index: c_int, + value: _Unwind_Word + ) { + let mut value = value; + unsafe { _Unwind_VRS_Set(ctx, _UVRSC_CORE, reg_index as _Unwind_Word, _UVRSD_UINT32, + (&raw mut value) as *mut c_void); } + } - pub unsafe fn _Unwind_GetIP(ctx: *mut _Unwind_Context) - -> _Unwind_Word { - let val = unsafe { _Unwind_GetGR(ctx, UNWIND_IP_REG) }; - val.map_addr(|v| v & !1) - } + pub unsafe fn _Unwind_GetIP(ctx: *mut _Unwind_Context) + -> _Unwind_Word { + let val = unsafe { _Unwind_GetGR(ctx, UNWIND_IP_REG) }; + val.map_addr(|v| v & !1) + } - pub unsafe fn _Unwind_SetIP(ctx: *mut _Unwind_Context, - value: _Unwind_Word) { - // Propagate thumb bit to instruction pointer - let thumb_state = unsafe { _Unwind_GetGR(ctx, UNWIND_IP_REG).addr() & 1 }; - let value = value.map_addr(|v| v | thumb_state); - unsafe { _Unwind_SetGR(ctx, UNWIND_IP_REG, value); } - } + pub unsafe fn _Unwind_SetIP(ctx: *mut _Unwind_Context, + value: _Unwind_Word) { + // Propagate thumb bit to instruction pointer + let thumb_state = unsafe { _Unwind_GetGR(ctx, UNWIND_IP_REG).addr() & 1 }; + let value = value.map_addr(|v| v | thumb_state); + unsafe { _Unwind_SetGR(ctx, UNWIND_IP_REG, value); } + } - pub unsafe fn _Unwind_GetIPInfo(ctx: *mut _Unwind_Context, - ip_before_insn: *mut c_int) - -> _Unwind_Word { - unsafe { - *ip_before_insn = 0; - _Unwind_GetIP(ctx) + pub unsafe fn _Unwind_GetIPInfo(ctx: *mut _Unwind_Context, + ip_before_insn: *mut c_int) + -> _Unwind_Word { + unsafe { + *ip_before_insn = 0; + _Unwind_GetIP(ctx) + } } - } - // This function also doesn't exist on Android or ARM/Linux, so make it a no-op - pub unsafe fn _Unwind_FindEnclosingFunction(pc: *mut c_void) -> *mut c_void { - pc + // This function also doesn't exist on Android or ARM/Linux, so make it a no-op + pub unsafe fn _Unwind_FindEnclosingFunction(pc: *mut c_void) -> *mut c_void { + pc + } } } -} // cfg_if! - -cfg_if::cfg_if! { -if #[cfg(all(target_vendor = "apple", not(target_os = "watchos"), target_arch = "arm"))] { - // 32-bit ARM Apple (except for watchOS armv7k specifically) uses SjLj and - // does not provide _Unwind_Backtrace() - unsafe extern "C-unwind" { - pub fn _Unwind_SjLj_RaiseException(e: *mut _Unwind_Exception) -> _Unwind_Reason_Code; - } - pub use _Unwind_SjLj_RaiseException as _Unwind_RaiseException; -} else { - #[cfg_attr( - all(feature = "llvm-libunwind", any(target_os = "fuchsia", target_os = "linux", target_os = "xous")), - link(name = "unwind", kind = "static", modifiers = "-bundle") - )] - unsafe extern "C-unwind" { - pub fn _Unwind_RaiseException(exception: *mut _Unwind_Exception) -> _Unwind_Reason_Code; +cfg_select! { + all(target_vendor = "apple", not(target_os = "watchos"), target_arch = "arm") => { + // 32-bit ARM Apple (except for watchOS armv7k specifically) uses SjLj and + // does not provide _Unwind_Backtrace() + unsafe extern "C-unwind" { + pub fn _Unwind_SjLj_RaiseException(e: *mut _Unwind_Exception) -> _Unwind_Reason_Code; + } + + pub use _Unwind_SjLj_RaiseException as _Unwind_RaiseException; } - #[cfg_attr( - all(feature = "llvm-libunwind", any(target_os = "fuchsia", target_os = "linux", target_os = "xous")), - link(name = "unwind", kind = "static", modifiers = "-bundle") - )] - unsafe extern "C" { - pub fn _Unwind_Backtrace(trace: _Unwind_Trace_Fn, - trace_argument: *mut c_void) - -> _Unwind_Reason_Code; + _ => { + #[cfg_attr( + all(feature = "llvm-libunwind", any(target_os = "fuchsia", target_os = "linux", target_os = "xous")), + link(name = "unwind", kind = "static", modifiers = "-bundle") + )] + unsafe extern "C-unwind" { + pub fn _Unwind_RaiseException(exception: *mut _Unwind_Exception) -> _Unwind_Reason_Code; + } + #[cfg_attr( + all(feature = "llvm-libunwind", any(target_os = "fuchsia", target_os = "linux", target_os = "xous")), + link(name = "unwind", kind = "static", modifiers = "-bundle") + )] + unsafe extern "C" { + pub fn _Unwind_Backtrace(trace: _Unwind_Trace_Fn, + trace_argument: *mut c_void) + -> _Unwind_Reason_Code; + } } } -} // cfg_if! -cfg_if::cfg_if! { -if #[cfg(any( +cfg_select! { + any( all(windows, any(target_arch = "aarch64", target_arch = "x86_64"), target_env = "gnu"), target_os = "cygwin", - ))] { - // We declare these as opaque types. This is fine since you just need to - // pass them to _GCC_specific_handler and forget about them. - pub enum EXCEPTION_RECORD {} - pub type LPVOID = *mut c_void; - pub enum CONTEXT {} - pub enum DISPATCHER_CONTEXT {} - pub type EXCEPTION_DISPOSITION = c_int; - type PersonalityFn = unsafe extern "C" fn(version: c_int, - actions: _Unwind_Action, - exception_class: _Unwind_Exception_Class, - exception_object: *mut _Unwind_Exception, - context: *mut _Unwind_Context) - -> _Unwind_Reason_Code; - - unsafe extern "C" { - pub fn _GCC_specific_handler(exceptionRecord: *mut EXCEPTION_RECORD, - establisherFrame: LPVOID, - contextRecord: *mut CONTEXT, - dispatcherContext: *mut DISPATCHER_CONTEXT, - personality: PersonalityFn) - -> EXCEPTION_DISPOSITION; + ) => { + // We declare these as opaque types. This is fine since you just need to + // pass them to _GCC_specific_handler and forget about them. + pub enum EXCEPTION_RECORD {} + pub type LPVOID = *mut c_void; + pub enum CONTEXT {} + pub enum DISPATCHER_CONTEXT {} + pub type EXCEPTION_DISPOSITION = c_int; + type PersonalityFn = unsafe extern "C" fn(version: c_int, + actions: _Unwind_Action, + exception_class: _Unwind_Exception_Class, + exception_object: *mut _Unwind_Exception, + context: *mut _Unwind_Context) + -> _Unwind_Reason_Code; + + unsafe extern "C" { + pub fn _GCC_specific_handler(exceptionRecord: *mut EXCEPTION_RECORD, + establisherFrame: LPVOID, + contextRecord: *mut CONTEXT, + dispatcherContext: *mut DISPATCHER_CONTEXT, + personality: PersonalityFn) + -> EXCEPTION_DISPOSITION; + } } + _ => {} } -} // cfg_if! |