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/* ===-- arm-ehabi-helpers.h - Supplementary ARM EHABI declarations --------===
*
* The LLVM Compiler Infrastructure
*
* This file is dual licensed under the MIT and the University of Illinois Open
* Source Licenses. See LICENSE.TXT for details.
*
* ===--------------------------------------------------------------------=== */
#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
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