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/* Copyright (C) 2004 Garrett A. Kajmowicz
This file is part of the uClibc++ Library.
This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
This library 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
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with this library; if not, write to the Free Software
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#include <exception>
#include <cstdlib>
#include <typeinfo>
#ifndef HEADER_ULC_SUPPORT
#define HEADER_ULC_SUPPORT 1
using namespace std;
//From C++ ABI spec
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;
typedef void (*_Unwind_Exception_Cleanup_Fn)
(_Unwind_Reason_Code reason, struct _Unwind_Exception *exc);
//The following definitions were grabbed from the gcc implementation
typedef unsigned _Unwind_Ptr __attribute__((__mode__(__pointer__)));
typedef unsigned _Unwind_Word __attribute__((__mode__(__word__)));
typedef signed _Unwind_Sword __attribute__((__mode__(__word__)));
typedef unsigned _Unwind_Exception_Class __attribute__((__mode__(__DI__)));
typedef void (*_Unwind_Exception_Cleanup_Fn) (_Unwind_Reason_Code, struct _Unwind_Exception *);
typedef int _Unwind_Action;
static const _Unwind_Action _UA_SEARCH_PHASE = 1;
static const _Unwind_Action _UA_CLEANUP_PHASE = 2;
static const _Unwind_Action _UA_HANDLER_FRAME = 4;
static const _Unwind_Action _UA_FORCE_UNWIND = 8;
const _Unwind_Exception_Class __uclibcxx_exception_class = ((((((((
_Unwind_Exception_Class) 'u' << 8 | (_Unwind_Exception_Class) 'l') << 8
| (_Unwind_Exception_Class) 'i') << 8 | (_Unwind_Exception_Class) 'b') << 8
| (_Unwind_Exception_Class) 'C')<< 8 | (_Unwind_Exception_Class) '+') << 8
| (_Unwind_Exception_Class) '+') << 8 | (_Unwind_Exception_Class) '\0');
#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
struct _Unwind_Exception{
_Unwind_Exception_Class exception_class; //Type of exception, eg ulibC++\0
_Unwind_Exception_Cleanup_Fn exception_cleanup; //Destructor if from diff runtime
_Unwind_Word private_1; //Don't touch at all!
_Unwind_Word private_2; //Don't touch at all!
} __attribute__((__aligned__));
//The following structure is system-dependent and defined by the compiler
//Thus it's definition was copied from the gcc 3.4.0 header files
struct _Unwind_Context;
//{
// void *reg[DWARF_FRAME_REGISTERS+1];
// void *cfa;
// void *ra;
// void *lsda;
// struct dwarf_eh_bases bases;
// _Unwind_Word args_size;
//};
_Unwind_Reason_Code _Unwind_RaiseException ( struct _Unwind_Exception *exception_object );
//_Unwind_ForcedUnwind
typedef _Unwind_Reason_Code (*_Unwind_Stop_Fn)
(int version, _Unwind_Action actions, _Unwind_Exception_Class exceptionClass,
struct _Unwind_Exception *exceptionObject,
struct _Unwind_Context *context, void *stop_parameter );
_Unwind_Reason_Code _Unwind_ForcedUnwind (
struct _Unwind_Exception *exception_object, _Unwind_Stop_Fn stop,
void *stop_parameter );
void _Unwind_Resume (struct _Unwind_Exception *exception_object);
void _Unwind_DeleteException (struct _Unwind_Exception *exception_object);
_Unwind_Word _Unwind_GetGR (struct _Unwind_Context *context, int index);
void _Unwind_SetGR (struct _Unwind_Context *context, int index, _Unwind_Word);
_Unwind_Ptr _Unwind_GetIP (struct _Unwind_Context *context);
void _Unwind_SetIP (struct _Unwind_Context *context, _Unwind_Ptr new_value);
_Unwind_Ptr _Unwind_GetLanguageSpecificData (struct _Unwind_Context *context);
_Unwind_Ptr _Unwind_GetRegionStart (struct _Unwind_Context *context);
_Unwind_Reason_Code (*__personality_routine)
(int version, //Should be 1
_Unwind_Action actions, //Actions the routine will perform (bitmask)
_Unwind_Exception_Class exceptionClass, //Type of exception - vendor is high 4 bytes
struct _Unwind_Exception *exceptionObject, //Points to exception header
struct _Unwind_Context *context); //Unwinder state information
/*The following part is the Level II ABI which is required for compatability*/
//This might be the only stuff that *I* need to implement
struct __cxa_exception {
std::type_info *exceptionType; //Type of thrown exception
void (*exceptionDestructor) (void *); //Pointer to the destructor
unexpected_handler unexpectedHandler; //Unexpected handler to use
terminate_handler terminateHandler; //Terminate handle to use
__cxa_exception *nextException; //per thread linked list
int handlerCount; //How many handlers have caught this
int handlerSwitchValue;
const char *actionRecord;
const char *languageSpecificData;
void *catchTemp;
void *adjustedPtr;
_Unwind_Exception unwindHeader;
};
struct __cxa_eh_globals {
__cxa_exception *caughtExceptions;
unsigned int uncaughtExceptions;
};
extern "C" __cxa_eh_globals *__cxa_get_globals(void); //Return ptr to the eh_globals object for current thread
extern "C" __cxa_eh_globals *__cxa_get_globals_fast(void); //Same as above, assumes that above called at least once
extern "C" void *__cxa_allocate_exception(size_t thrown_size); //Allocate space for exception plus header
extern "C" void __cxa_free_exception(void *thrown_exception); //Free space allocated from the above
extern "C" void __cxa_throw (void *thrown_exception, //This is the actual throw call
// std::type_info *tinfo, //Type of object
void * tinfo, //Type of object
void (*dest) (void *) ); //Pointer to destructor destroy object
#endif
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