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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.
 * ===--------------------------------------------------------------------=== */


#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;

#define _US_UNWIND_FRAME_STARTING ((_Unwind_State)1)

#if !defined(_US_ACTION_MASK)
#define _US_ACTION_MASK ((_Unwind_State)3)