1 files changed, 51 insertions, 0 deletions
diff --git a/contrib/llvm-project/compiler-rt/lib/builtins/unwind-ehabi-helpers.h b/contrib/llvm-project/compiler-rt/lib/builtins/unwind-ehabi-helpers.h
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+++ b/contrib/llvm-project/compiler-rt/lib/builtins/unwind-ehabi-helpers.h
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+//===-- 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