1 files changed, 191 insertions, 0 deletions
diff --git a/sysdeps/generic/unwind.h b/sysdeps/generic/unwind.h
new file mode 100644
index 0000000000..ce43365a31
--- /dev/null
+++ b/sysdeps/generic/unwind.h
@@ -0,0 +1,191 @@
+/* Exception handling and frame unwind runtime interface routines.
+   Copyright (C) 2001 Free Software Foundation, Inc.
+
+   This file is part of GNU CC.
+
+   GNU CC is free software; you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 2, or (at your option)
+   any later version.
+
+   GNU CC is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with GNU CC; see the file COPYING.  If not, write to
+   the Free Software Foundation, 59 Temple Place - Suite 330,
+   Boston, MA 02111-1307, USA.  */
+
+/* This is derived from the C++ ABI for IA-64.  Where we diverge
+   for cross-architecture compatibility are noted with "@@@".  */
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/* Level 1: Base ABI  */
+
+/* @@@ The IA-64 ABI uses uint64 throughout.  Most places this is
+   inefficient for 32-bit and smaller machines.  */
+typedef unsigned _Unwind_Word __attribute__((__mode__(__word__)));
+typedef signed _Unwind_Sword __attribute__((__mode__(__word__)));
+typedef unsigned _Unwind_Ptr __attribute__((__mode__(__pointer__)));
+
+/* @@@ The IA-64 ABI uses a 64-bit word to identify the producer and
+   consumer of an exception.  We'll go along with this for now even on
+   32-bit machines.  We'll need to provide some other option for
+   16-bit machines and for machines with > 8 bits per byte.  */
+typedef unsigned _Unwind_Exception_Class __attribute__((__mode__(__DI__)));
+
+/* The unwind interface uses reason codes in several contexts to
+   identify the reasons for failures or other actions.  */
+typedef enum
+{
+  _URC_NO_REASON = 0,
+  _URC_FOREIGN_EXCEPTION_CAUGHT = 1,
+  _URC_FATAL_PHASE2_ERROR = 2,
+  _URC_FATAL_PHASE1_ERROR = 3,
+  _URC_NORMAL_STOP = 4,
+  _URC_END_OF_STACK = 5,
+  _URC_HANDLER_FOUND = 6,
+  _URC_INSTALL_CONTEXT = 7,
+  _URC_CONTINUE_UNWIND = 8
+} _Unwind_Reason_Code;
+
+
+/* The unwind interface uses a pointer to an exception header object
+   as its representation of an exception being thrown. In general, the
+   full representation of an exception object is language- and
+   implementation-specific, but it will be prefixed by a header
+   understood by the unwind interface.  */
+
+struct _Unwind_Exception;
+
+typedef void (*_Unwind_Exception_Cleanup_Fn) (_Unwind_Reason_Code,
+					      struct _Unwind_Exception *);
+
+struct _Unwind_Exception
+{
+  _Unwind_Exception_Class exception_class;
+  _Unwind_Exception_Cleanup_Fn exception_cleanup;
+  _Unwind_Word private_1;
+  _Unwind_Word private_2;
+
+  /* @@@ The IA-64 ABI says that this structure must be double-word aligned.
+     Taking that literally does not make much sense generically.  Instead we
+     provide the maximum alignment required by any type for the machine.  */
+} __attribute__((__aligned__));
+
+
+/* The ACTIONS argument to the personality routine is a bitwise OR of one
+   or more of the following constants.  */
+typedef int _Unwind_Action;
+
+#define _UA_SEARCH_PHASE	1
+#define _UA_CLEANUP_PHASE	2
+#define _UA_HANDLER_FRAME	4
+#define _UA_FORCE_UNWIND	8
+
+/* This is an opaque type used to refer to a system-specific data
+   structure used by the system unwinder. This context is created and
+   destroyed by the system, and passed to the personality routine
+   during unwinding.  */
+struct _Unwind_Context;
+
+/* Raise an exception, passing along the given exception object.  */
+extern _Unwind_Reason_Code _Unwind_RaiseException (struct _Unwind_Exception *);
+
+/* Raise an exception for forced unwinding.  */
+
+typedef _Unwind_Reason_Code (*_Unwind_Stop_Fn)
+     (int, _Unwind_Action, _Unwind_Exception_Class,
+      struct _Unwind_Exception *, struct _Unwind_Context *, void *);
+
+extern _Unwind_Reason_Code _Unwind_ForcedUnwind (struct _Unwind_Exception *,
+						 _Unwind_Stop_Fn,
+						 void *);
+
+/* Helper to invoke the exception_cleanup routine.  */
+extern void _Unwind_DeleteException (struct _Unwind_Exception *);
+
+/* Resume propagation of an existing exception.  This is used after
+   e.g. executing cleanup code, and not to implement rethrowing.  */
+extern void _Unwind_Resume (struct _Unwind_Exception *);
+
+/* These functions are used for communicating information about the unwind
+   context (i.e. the unwind descriptors and the user register state) between
+   the unwind library and the personality routine and landing pad.  Only
+   selected registers maybe manipulated.  */
+
+extern _Unwind_Word _Unwind_GetGR (struct _Unwind_Context *, int);
+extern void _Unwind_SetGR (struct _Unwind_Context *, int, _Unwind_Word);
+
+extern _Unwind_Ptr _Unwind_GetIP (struct _Unwind_Context *);
+extern void _Unwind_SetIP (struct _Unwind_Context *, _Unwind_Ptr);
+
+extern void *_Unwind_GetLanguageSpecificData (struct _Unwind_Context *);
+
+extern _Unwind_Ptr _Unwind_GetRegionStart (struct _Unwind_Context *);
+
+
+/* The personality routine is the function in the C++ (or other language)
+   runtime library which serves as an interface between the system unwind
+   library and language-specific exception handling semantics.  It is
+   specific to the code fragment described by an unwind info block, and
+   it is always referenced via the pointer in the unwind info block, and
+   hence it has no ABI-specified name. 
+
+   Note that this implies that two different C++ implementations can
+   use different names, and have different contents in the language
+   specific data area.  Moreover, that the language specific data 
+   area contains no version info because name of the function invoked
+   provides more effective versioning by detecting at link time the
+   lack of code to handle the different data format.  */
+   
+typedef _Unwind_Reason_Code (*_Unwind_Personality_Fn)
+     (int, _Unwind_Action, _Unwind_Exception_Class,
+      struct _Unwind_Exception *, struct _Unwind_Context *);
+
+/* @@@ The following alternate entry points are for setjmp/longjmp
+   based unwinding.  */
+
+struct SjLj_Function_Context;
+extern void _Unwind_SjLj_Register (struct SjLj_Function_Context *);
+extern void _Unwind_SjLj_Unregister (struct SjLj_Function_Context *);
+
+extern _Unwind_Reason_Code _Unwind_SjLj_RaiseException
+     (struct _Unwind_Exception *);
+extern _Unwind_Reason_Code _Unwind_SjLj_ForcedUnwind
+     (struct _Unwind_Exception *, _Unwind_Stop_Fn, void *);
+extern void _Unwind_SjLj_Resume (struct _Unwind_Exception *);
+
+/* @@@ The following provide access to the base addresses for text
+   and data-relative addressing in the LDSA.  In order to stay link
+   compatible with the standard ABI for IA-64, we inline these.  */
+
+#ifdef __ia64__
+#include <stdlib.h>
+
+static inline _Unwind_Ptr
+_Unwind_GetDataRelBase (struct _Unwind_Context *_C)
+{
+  /* The GP is stored in R1.  */
+  return _Unwind_GetGR (_C, 1);
+}
+
+static inline _Unwind_Ptr
+_Unwind_GetTextRelBase (struct _Unwind_Context *_C)
+{
+  abort ();
+  return 0;
+}
+#else
+extern _Unwind_Ptr _Unwind_GetDataRelBase (struct _Unwind_Context *);
+extern _Unwind_Ptr _Unwind_GetTextRelBase (struct _Unwind_Context *);
+#endif
+
+#ifdef __cplusplus
+}
+#endif