// Copyright 2016 The Rust Project Developers. See the COPYRIGHT // file at the top-level directory of this distribution and at // http://rust-lang.org/COPYRIGHT. // // Licensed under the Apache License, Version 2.0 or the MIT license // , at your // option. This file may not be copied, modified, or distributed // except according to those terms. #![allow(bad_style)] use libc; #[cfg(any(not(target_arch = "arm"), target_os = "ios"))] pub use self::_Unwind_Action::*; #[cfg(target_arch = "arm")] pub use self::_Unwind_State::*; pub use self::_Unwind_Reason_Code::*; #[cfg(any(not(target_arch = "arm"), target_os = "ios"))] #[repr(C)] #[derive(Clone, Copy)] pub enum _Unwind_Action { _UA_SEARCH_PHASE = 1, _UA_CLEANUP_PHASE = 2, _UA_HANDLER_FRAME = 4, _UA_FORCE_UNWIND = 8, _UA_END_OF_STACK = 16, } #[cfg(target_arch = "arm")] #[repr(C)] #[derive(Clone, Copy)] 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, } #[repr(C)] pub enum _Unwind_Reason_Code { _URC_NO_REASON = 0, _URC_FOREIGN_EXCEPTION_CAUGHT = 1, _URC_FATAL_PHASE2_ERROR = 2, _URC_FATAL_PHASE1_ERROR = 3, _URC_NORMAL_STOP = 4, _URC_END_OF_STACK = 5, _URC_HANDLER_FOUND = 6, _URC_INSTALL_CONTEXT = 7, _URC_CONTINUE_UNWIND = 8, _URC_FAILURE = 9, // used only by ARM EABI } pub type _Unwind_Exception_Class = u64; pub type _Unwind_Word = libc::uintptr_t; pub type _Unwind_Trace_Fn = extern "C" fn(ctx: *mut _Unwind_Context, arg: *mut libc::c_void) -> _Unwind_Reason_Code; #[cfg(target_arch = "x86")] pub const unwinder_private_data_size: usize = 5; #[cfg(target_arch = "x86_64")] pub const unwinder_private_data_size: usize = 6; #[cfg(all(target_arch = "arm", not(target_os = "ios")))] pub const unwinder_private_data_size: usize = 20; #[cfg(all(target_arch = "arm", target_os = "ios"))] pub const unwinder_private_data_size: usize = 5; #[cfg(target_arch = "aarch64")] pub const unwinder_private_data_size: usize = 2; #[cfg(target_arch = "mips")] pub const unwinder_private_data_size: usize = 2; #[cfg(any(target_arch = "powerpc", target_arch = "powerpc64"))] pub const unwinder_private_data_size: usize = 2; #[cfg(target_arch = "asmjs")] // FIXME: Copied from arm. Need to confirm. pub const unwinder_private_data_size: usize = 20; #[repr(C)] pub struct _Unwind_Exception { pub exception_class: _Unwind_Exception_Class, pub exception_cleanup: _Unwind_Exception_Cleanup_Fn, pub private: [_Unwind_Word; unwinder_private_data_size], } pub enum _Unwind_Context {} pub type _Unwind_Exception_Cleanup_Fn = extern "C" fn(unwind_code: _Unwind_Reason_Code, exception: *mut _Unwind_Exception); #[cfg_attr(any(all(target_os = "linux", not(target_env = "musl")), target_os = "freebsd", target_os = "solaris", all(target_os = "linux", target_env = "musl", not(target_arch = "x86"), not(target_arch = "x86_64"))), link(name = "gcc_s"))] #[cfg_attr(all(target_os = "linux", target_env = "musl", any(target_arch = "x86", target_arch = "x86_64"), not(test)), link(name = "unwind", kind = "static"))] #[cfg_attr(any(target_os = "android", target_os = "openbsd"), link(name = "gcc"))] #[cfg_attr(all(target_os = "netbsd", not(target_vendor = "rumprun")), link(name = "gcc"))] #[cfg_attr(all(target_os = "netbsd", target_vendor = "rumprun"), link(name = "unwind"))] #[cfg_attr(target_os = "dragonfly", link(name = "gcc_pic"))] #[cfg_attr(target_os = "bitrig", link(name = "c++abi"))] #[cfg_attr(all(target_os = "windows", target_env = "gnu"), link(name = "gcc_eh"))] #[cfg(not(cargobuild))] extern "C" {} extern "C" { // iOS on armv7 uses SjLj exceptions and requires to link // against corresponding routine (..._SjLj_...) #[cfg(not(all(target_os = "ios", target_arch = "arm")))] #[unwind] pub fn _Unwind_RaiseException(exception: *mut _Unwind_Exception) -> _Unwind_Reason_Code; #[cfg(all(target_os = "ios", target_arch = "arm"))] #[unwind] fn _Unwind_SjLj_RaiseException(e: *mut _Unwind_Exception) -> _Unwind_Reason_Code; pub fn _Unwind_DeleteException(exception: *mut _Unwind_Exception); #[unwind] pub fn _Unwind_Resume(exception: *mut _Unwind_Exception) -> !; // No native _Unwind_Backtrace on iOS #[cfg(not(all(target_os = "ios", target_arch = "arm")))] pub fn _Unwind_Backtrace(trace: _Unwind_Trace_Fn, trace_argument: *mut libc::c_void) -> _Unwind_Reason_Code; // available since GCC 4.2.0, should be fine for our purpose #[cfg(all(not(all(target_os = "android", target_arch = "arm")), not(all(target_os = "linux", target_arch = "arm"))))] pub fn _Unwind_GetIPInfo(ctx: *mut _Unwind_Context, ip_before_insn: *mut libc::c_int) -> libc::uintptr_t; #[cfg(all(not(target_os = "android"), not(all(target_os = "linux", target_arch = "arm"))))] pub fn _Unwind_FindEnclosingFunction(pc: *mut libc::c_void) -> *mut libc::c_void; } // ... and now we just providing access to SjLj counterspart // through a standard name to hide those details from others // (see also comment above regarding _Unwind_RaiseException) #[cfg(all(target_os = "ios", target_arch = "arm"))] #[inline] pub unsafe fn _Unwind_RaiseException(exc: *mut _Unwind_Exception) -> _Unwind_Reason_Code { _Unwind_SjLj_RaiseException(exc) } // On android, the function _Unwind_GetIP is a macro, and this is the // expansion of the macro. This is all copy/pasted directly from the // header file with the definition of _Unwind_GetIP. #[cfg(any(all(target_os = "android", target_arch = "arm"), all(target_os = "linux", target_arch = "arm")))] pub unsafe fn _Unwind_GetIP(ctx: *mut _Unwind_Context) -> libc::uintptr_t { #[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, } #[repr(C)] enum _Unwind_VRS_DataRepresentation { _UVRSD_UINT32 = 0, _UVRSD_VFPX = 1, _UVRSD_FPAX = 2, _UVRSD_UINT64 = 3, _UVRSD_FLOAT = 4, _UVRSD_DOUBLE = 5, } type _Unwind_Word = libc::c_uint; extern "C" { fn _Unwind_VRS_Get(ctx: *mut _Unwind_Context, klass: _Unwind_VRS_RegClass, word: _Unwind_Word, repr: _Unwind_VRS_DataRepresentation, data: *mut libc::c_void) -> _Unwind_VRS_Result; } let mut val: _Unwind_Word = 0; let ptr = &mut val as *mut _Unwind_Word; let _ = _Unwind_VRS_Get(ctx, _Unwind_VRS_RegClass::_UVRSC_CORE, 15, _Unwind_VRS_DataRepresentation::_UVRSD_UINT32, ptr as *mut libc::c_void); (val & !1) as libc::uintptr_t } // This function doesn't exist on Android or ARM/Linux, so make it same // to _Unwind_GetIP #[cfg(any(all(target_os = "android", target_arch = "arm"), all(target_os = "linux", target_arch = "arm")))] pub unsafe fn _Unwind_GetIPInfo(ctx: *mut _Unwind_Context, ip_before_insn: *mut libc::c_int) -> libc::uintptr_t { *ip_before_insn = 0; _Unwind_GetIP(ctx) } // This function also doesn't exist on Android or ARM/Linux, so make it // a no-op #[cfg(any(target_os = "android", all(target_os = "linux", target_arch = "arm")))] pub unsafe fn _Unwind_FindEnclosingFunction(pc: *mut libc::c_void) -> *mut libc::c_void { pc }