1*0b57cec5SDimitry Andric //===-- arm-ehabi-helpers.h - Supplementary ARM EHABI declarations --------===// 2*0b57cec5SDimitry Andric // 3*0b57cec5SDimitry Andric // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. 4*0b57cec5SDimitry Andric // See https://llvm.org/LICENSE.txt for license information. 5*0b57cec5SDimitry Andric // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception 6*0b57cec5SDimitry Andric // 7*0b57cec5SDimitry Andric //===--------------------------------------------------------------------===// 8*0b57cec5SDimitry Andric 9*0b57cec5SDimitry Andric #ifndef UNWIND_EHABI_HELPERS_H 10*0b57cec5SDimitry Andric #define UNWIND_EHABI_HELPERS_H 11*0b57cec5SDimitry Andric 12*0b57cec5SDimitry Andric #include <stdint.h> 13*0b57cec5SDimitry Andric // NOTE: see reasoning for this inclusion below 14*0b57cec5SDimitry Andric #include <unwind.h> 15*0b57cec5SDimitry Andric 16*0b57cec5SDimitry Andric #if !defined(__ARM_EABI_UNWINDER__) 17*0b57cec5SDimitry Andric 18*0b57cec5SDimitry Andric // NOTE: _URC_OK, _URC_FAILURE must be present as preprocessor tokens. This 19*0b57cec5SDimitry Andric // allows for a substitution of a constant which can be cast into the 20*0b57cec5SDimitry Andric // appropriate enumerated type. This header is expected to always be included 21*0b57cec5SDimitry Andric // AFTER unwind.h (which is why it is forcefully included above). This ensures 22*0b57cec5SDimitry Andric // that we do not overwrite the token for the enumeration. Subsequent uses of 23*0b57cec5SDimitry Andric // the token would be clean to rewrite with constant values. 24*0b57cec5SDimitry Andric // 25*0b57cec5SDimitry Andric // The typedef redeclaration should be safe. Due to the protection granted to 26*0b57cec5SDimitry Andric // us by the `__ARM_EABI_UNWINDER__` above, we are guaranteed that we are in a 27*0b57cec5SDimitry Andric // header not vended by gcc. The HP unwinder (being an itanium unwinder) does 28*0b57cec5SDimitry Andric // not support EHABI, and the GNU unwinder, derived from the HP unwinder, also 29*0b57cec5SDimitry Andric // does not support EHABI as of the introduction of this header. As such, we 30*0b57cec5SDimitry Andric // are fairly certain that we are in the LLVM case. Here, _Unwind_State is a 31*0b57cec5SDimitry Andric // typedef, and so we can get away with a redeclaration. 32*0b57cec5SDimitry Andric // 33*0b57cec5SDimitry Andric // Guarded redefinitions of the needed unwind state prevent the redefinition of 34*0b57cec5SDimitry Andric // those states. 35*0b57cec5SDimitry Andric 36*0b57cec5SDimitry Andric #define _URC_OK 0 37*0b57cec5SDimitry Andric #define _URC_FAILURE 9 38*0b57cec5SDimitry Andric 39*0b57cec5SDimitry Andric typedef uint32_t _Unwind_State; 40*0b57cec5SDimitry Andric 41*0b57cec5SDimitry Andric #if !defined(_US_UNWIND_FRAME_STARTING) 42*0b57cec5SDimitry Andric #define _US_UNWIND_FRAME_STARTING ((_Unwind_State)1) 43*0b57cec5SDimitry Andric #endif 44*0b57cec5SDimitry Andric 45*0b57cec5SDimitry Andric #if !defined(_US_ACTION_MASK) 46*0b57cec5SDimitry Andric #define _US_ACTION_MASK ((_Unwind_State)3) 47*0b57cec5SDimitry Andric #endif 48*0b57cec5SDimitry Andric 49*0b57cec5SDimitry Andric #endif 50*0b57cec5SDimitry Andric 51*0b57cec5SDimitry Andric #endif 52