| //===-- arm-ehabi-helpers.h - Supplementary ARM EHABI declarations --------===// |
| // |
| // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. |
| // See https://llvm.org/LICENSE.txt for license information. |
| // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception |
| // |
| //===--------------------------------------------------------------------===// |
| |
| #ifndef UNWIND_EHABI_HELPERS_H |
| #define UNWIND_EHABI_HELPERS_H |
| |
| #include <stdint.h> |
| // NOTE: see reasoning for this inclusion below |
| #include <unwind.h> |
| |
| #if !defined(__ARM_EABI_UNWINDER__) |
| |
| // NOTE: _URC_OK, _URC_FAILURE must be present as preprocessor tokens. This |
| // allows for a substitution of a constant which can be cast into the |
| // appropriate enumerated type. This header is expected to always be included |
| // AFTER unwind.h (which is why it is forcefully included above). This ensures |
| // that we do not overwrite the token for the enumeration. Subsequent uses of |
| // the token would be clean to rewrite with constant values. |
| // |
| // The typedef redeclaration should be safe. Due to the protection granted to |
| // us by the `__ARM_EABI_UNWINDER__` above, we are guaranteed that we are in a |
| // header not vended by gcc. The HP unwinder (being an itanium unwinder) does |
| // not support EHABI, and the GNU unwinder, derived from the HP unwinder, also |
| // does not support EHABI as of the introduction of this header. As such, we |
| // are fairly certain that we are in the LLVM case. Here, _Unwind_State is a |
| // typedef, and so we can get away with a redeclaration. |
| // |
| // Guarded redefinitions of the needed unwind state prevent the redefinition of |
| // those states. |
| |
| #define _URC_OK 0 |
| #define _URC_FAILURE 9 |
| |
| typedef uint32_t _Unwind_State; |
| |
| #if !defined(_US_UNWIND_FRAME_STARTING) |
| #define _US_UNWIND_FRAME_STARTING ((_Unwind_State)1) |
| #endif |
| |
| #if !defined(_US_ACTION_MASK) |
| #define _US_ACTION_MASK ((_Unwind_State)3) |
| #endif |
| |
| #endif |
| |
| #endif |