+++ /dev/null
-/* Exception handling and frame unwind runtime interface routines.
- Copyright (C) 2001, 2003, 2004 Free Software Foundation, Inc.
-
- This file is part of GCC.
-
- GCC 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.
-
- GCC 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 GCC; see the file COPYING. If not, write to the Free
- Software Foundation, 59 Temple Place - Suite 330, Boston, MA
- 02111-1307, USA. */
-
-/* As a special exception, if you include this header file into source
- files compiled by GCC, this header file does not by itself cause
- the resulting executable to be covered by the GNU General Public
- License. This exception does not however invalidate any other
- reasons why the executable file might be covered by the GNU General
- Public License. */
-
-/* This is derived from the C++ ABI for IA-64. Where we diverge
- for cross-architecture compatibility are noted with "@@@". */
-
-#ifndef _UNWIND_H
-#define _UNWIND_H
-
-#ifndef HIDE_EXPORTS
-#pragma GCC visibility push(default)
-#endif
-
-#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__)));
-#if defined(__ia64__) && defined(__hpux__)
-typedef unsigned _Unwind_Ptr __attribute__((__mode__(__word__)));
-#else
-typedef unsigned _Unwind_Ptr __attribute__((__mode__(__pointer__)));
-#endif
-typedef unsigned _Unwind_Internal_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
-#define _UA_END_OF_STACK 16
-
-/* 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 *);
-
-/* @@@ Resume propagation of an FORCE_UNWIND exception, or to rethrow
- a normal exception that was handled. */
-extern _Unwind_Reason_Code _Unwind_Resume_or_Rethrow (struct _Unwind_Exception *);
-
-/* @@@ Use unwind data to perform a stack backtrace. The trace callback
- is called for every stack frame in the call chain, but no cleanup
- actions are performed. */
-typedef _Unwind_Reason_Code (*_Unwind_Trace_Fn)
- (struct _Unwind_Context *, void *);
-
-extern _Unwind_Reason_Code _Unwind_Backtrace (_Unwind_Trace_Fn, void *);
-
-/* 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);
-
-/* @@@ Retrieve the CFA of the given context. */
-extern _Unwind_Word _Unwind_GetCFA (struct _Unwind_Context *);
-
-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 *);
-extern _Unwind_Reason_Code _Unwind_SjLj_Resume_or_Rethrow (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 __attribute__ ((__unused__)))
-{
- abort ();
- return 0;
-}
-
-/* @@@ Retrieve the Backing Store Pointer of the given context. */
-extern _Unwind_Word _Unwind_GetBSP (struct _Unwind_Context *);
-#else
-extern _Unwind_Ptr _Unwind_GetDataRelBase (struct _Unwind_Context *);
-extern _Unwind_Ptr _Unwind_GetTextRelBase (struct _Unwind_Context *);
-#endif
-
-/* @@@ Given an address, return the entry point of the function that
- contains it. */
-extern void * _Unwind_FindEnclosingFunction (void *pc);
-
-#ifdef __cplusplus
-}
-#endif
-
-#ifndef HIDE_EXPORTS
-#pragma GCC visibility pop
-#endif
-
-#endif /* unwind.h */
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