ObjFW  Diff

#ifndef HAVE_SJLJ_EXCEPTIONS
extern _Unwind_Reason_Code _Unwind_RaiseException(struct _Unwind_Exception*);
#else
extern _Unwind_Reason_Code _Unwind_SjLj_RaiseException(
    struct _Unwind_Exception*);
#endif
extern void _Unwind_DeleteException(struct _Unwind_Exception*);
extern void* _Unwind_GetLanguageSpecificData(struct _Unwind_Context*);
extern uintptr_t _Unwind_GetRegionStart(struct _Unwind_Context*);
extern uintptr_t _Unwind_GetDataRelBase(struct _Unwind_Context*);
extern uintptr_t _Unwind_GetTextRelBase(struct _Unwind_Context*);

#if defined(__arm__) || defined(__ARM__)
extern _Unwind_Reason_Code __gnu_unwind_frame(struct _Unwind_Exception*,

{
	uint64_t value;

	if (enc == DW_EH_PE_aligned)
		/* Not implemented */
		abort();

#define READ(type)				\
	{					\
		value = *(type*)(void*)*ptr;	\
		*ptr += size_for_encoding(enc);	\
		break;				\
	}

	switch (enc & 0x0F) {
	case DW_EH_PE_absptr:
		READ(uintptr_t)
	case DW_EH_PE_uleb128:
		value = read_uleb128(ptr);
		break;
	case DW_EH_PE_udata2:
		READ(uint16_t)
	case DW_EH_PE_udata4:
		READ(uint32_t)
	case DW_EH_PE_udata8:
		READ(uint64_t)
	case DW_EH_PE_sleb128:
		value = read_sleb128(ptr);
		break;
	case DW_EH_PE_sdata2:
		READ(int16_t)
	case DW_EH_PE_sdata4:
		READ(int32_t)
	case DW_EH_PE_sdata8:
		READ(int64_t)
	default:
		abort();
	}

#undef READ

	return value;
}

#if !defined(__arm__) && !defined(__ARM__)
static uint64_t
resolve_value(uint64_t value, uint8_t enc, const uint8_t *start, uint64_t base)

	bool foreign = (ex_class != objc_exception_class);
	const uint8_t *lsda_addr, *actionrecords;
	struct lsda lsda;
	uintptr_t landingpad = 0;
	uint8_t found = 0;
	intptr_t filter = 0;

	if (version != 1 || ctx == NULL)
		return _URC_FATAL_PHASE1_ERROR;




	/*
	 * We already cached everything we found in phase 1, so we only need
	 * to install the context in phase 2.
	 */
	if (actions & _UA_HANDLER_FRAME && !foreign) {
		/*
		 * For handlers, reg #0 must be the exception's object and reg

		_Unwind_SetIP(ctx, ex->barrier_cache.bitpattern[3]);
#else
		_Unwind_SetGR(ctx, __builtin_eh_return_data_regno(1),
		    e->filter);
		_Unwind_SetIP(ctx, e->landingpad);
#endif

		_Unwind_DeleteException(ex);

		return _URC_INSTALL_CONTEXT;
	}

	/* No LSDA -> nothing to handle */
	if ((lsda_addr = _Unwind_GetLanguageSpecificData(ctx)) == NULL)
		CONTINUE_UNWIND;

	read_lsda(ctx, lsda_addr, &lsda);

	if (!find_callsite(ctx, &lsda, &landingpad, &actionrecords))
		CONTINUE_UNWIND;

	if (landingpad != 0 && actionrecords != NULL)


		found = find_actionrecord(actionrecords, &lsda, actions,
		    foreign, e, &filter);
	else if (landingpad != 0)
		found = CLEANUP_FOUND;

	if (!found)
		CONTINUE_UNWIND;

	if (actions & _UA_SEARCH_PHASE) {
		if (!(found & HANDLER_FOUND) || foreign)
			CONTINUE_UNWIND;

		if (!(found & CLEANUP_FOUND))
			CONTINUE_UNWIND;

		_Unwind_SetGR(ctx, __builtin_eh_return_data_regno(0),
		    (uintptr_t)ex);
		_Unwind_SetGR(ctx, __builtin_eh_return_data_regno(1), filter);
		_Unwind_SetIP(ctx, landingpad);

		_Unwind_DeleteException(ex);

		return _URC_INSTALL_CONTEXT;
	}

	abort();
}