author | Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com> |
Thu, 07 Jan 2010 13:38:45 +0200 | |
changeset 10 | 36bfc973b146 |
parent 9 | 96e5fb8b040d |
child 11 | 329ab0095843 |
permissions | -rw-r--r-- |
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/* |
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* Copyright (c) 2004-2009 Nokia Corporation and/or its subsidiary(-ies). |
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* All rights reserved. |
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* This component and the accompanying materials are made available |
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* under the terms of the License "Eclipse Public License v1.0" |
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* which accompanies this distribution, and is available |
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* at the URL "http://www.eclipse.org/legal/epl-v10.html". |
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* |
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* Initial Contributors: |
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* Nokia Corporation - initial contribution. |
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* |
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* Contributors: |
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* |
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* Description: |
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* e32/compsupp/symaehabi/symbian_support.h |
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* |
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*/ |
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#ifndef SYMBIAN_SUPPORT_H |
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#define SYMBIAN_SUPPORT_H |
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#include <e32def_private.h> |
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#ifdef __cplusplus |
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typedef _Unwind_Control_Block UCB; |
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using std::terminate_handler; |
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using std::unexpected_handler; |
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using std::terminate; |
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using std::unexpected; |
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using std::type_info; |
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/* --------- Exception control object: --------- */ |
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// Type __cxa_exception is the combined C++ housekeeping (LEO) and UCB. |
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// It will be followed by the user exception object, hence must ensure |
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// the latter is aligned on an 8 byte boundary. |
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struct __cxa_exception { |
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const type_info *exceptionType; // RTTI object describing the type of the exception |
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void *(*exceptionDestructor)(void *); // Destructor for the exception object (may be NULL) |
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unexpected_handler unexpectedHandler; // Handler in force after evaluating throw expr |
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terminate_handler terminateHandler; // Handler in force after evaluating throw expr |
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__cxa_exception *nextCaughtException; // Chain of "currently caught" c++ exception objects |
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uint32_t handlerCount; // Count of how many handlers this EO is "caught" in |
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__cxa_exception *nextPropagatingException; // Chain of objects saved over cleanup |
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uint32_t propagationCount; // Count of live propagations (throws) of this EO |
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UCB ucb; // Forces alignment of next item to 8-byte boundary |
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}; |
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// Exceptions global support |
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typedef void (*handler)(void); |
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struct __cxa_eh_globals { |
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uint32_t uncaughtExceptions; // counter |
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unexpected_handler unexpectedHandler; // per-thread handler |
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terminate_handler terminateHandler; // per-thread handler |
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bool implementation_ever_called_terminate; // true if it ever did |
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handler call_hook; // transient field to tell terminate/unexpected which hook to call |
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__cxa_exception *caughtExceptions; // chain of "caught" exceptions |
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__cxa_exception *propagatingExceptions; // chain of "propagating" (in cleanup) exceptions |
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void *emergency_buffer; // emergency buffer for when rest of heap full |
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}; |
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// emergency storage reserve primarily for throwing OOM exceptions |
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struct emergency_eco { |
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__cxa_exception ep; |
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XLeaveException aUserLeaveException; |
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}; |
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struct emergency_buffer { |
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bool inuse; |
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struct emergency_eco eco; |
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}; |
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class TCppRTExceptionsGlobals |
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{ |
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public: |
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IMPORT_C TCppRTExceptionsGlobals(); |
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private: |
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__cxa_eh_globals thread_globals; |
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emergency_buffer buffer; |
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}; |
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#endif |
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// Support for finding ROM resident ExIdx tables |
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#define GET_ROM_EST(u) ((TRomExceptionSearchTable *)((u)->unwinder_cache.reserved4)) |
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#define SET_ROM_EST(u,e) ((TRomExceptionSearchTable *)((u)->unwinder_cache.reserved4=(uint32_t)e)) |
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#define GET_EXCEPTION_DESCRIPTOR(u) ((TExceptionDescriptor *)((u)->unwinder_cache.reserved5)) |
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#define SET_EXCEPTION_DESCRIPTOR(u,e) ((TExceptionDescriptor *)((u)->unwinder_cache.reserved5=(uint32_t)e)) |
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// Support for checking which version of EHABI is in play |
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#define EHABI_MASK 0xfffffffc |
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// Checks if image implements V2 of EHABI |
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#define EHABI_V2(u) ((GET_EXCEPTION_DESCRIPTOR(u)->iROSegmentBase) & 1) |
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#define GET_RO_BASE(u) (((u)->iROSegmentBase) & EHABI_MASK) |
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#define ADDRESS_IN_EXCEPTION_DESCRIPTOR_RANGE(addr, aEDp) (((addr) >= GET_RO_BASE(aEDp)) && ((addr) < (aEDp)->iROSegmentLimit)) |
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#define GET_EST_FENCEPOST(aESTp) ((aESTp)->iEntries[(aESTp)->iNumEntries]) |
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#define ADDRESS_IN_ROM_EST(addr, aESTp) (((addr) >= (aESTp)->iEntries[0]) && ((addr) < GET_EST_FENCEPOST((aESTp)))) |
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105 |
|
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106 |
|
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// Non __EPOC32__ versions defined in unwinder.c |
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#define EIT_base(u) \ |
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((const __EIT_entry *)((GET_EXCEPTION_DESCRIPTOR(u))->iExIdxBase)) |
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#define EIT_limit(u) \ |
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((const __EIT_entry *)((GET_EXCEPTION_DESCRIPTOR(u))->iExIdxLimit)) |
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112 |
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113 |
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#ifdef __cplusplus |
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extern "C" { |
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#endif |
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117 |
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typedef unsigned int size_t; |
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IMPORT_C void abort(void); |
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int typenameeq(const char * n1, const char * n2); |
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121 |
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#define malloc User::Alloc |
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#define free User::Free |
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124 |
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125 |
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#ifdef _DEBUG |
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// uncomment this for diagnostic output in UDEB build |
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//#define _DEBUG_SYMBIAN_EH_SUPPORT |
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#endif |
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130 |
|
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#ifdef _DEBUG_SYMBIAN_EH_SUPPORT |
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#define VRS_DIAGNOSTICS |
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#define UNWIND_ACTIVITY_DIAGNOSTICS |
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#define PR_DIAGNOSTICS |
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#define PRINTED_DIAGNOSTICS |
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#define CPP_DIAGNOSTICS |
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137 |
#endif |
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#define printf DebugPrintf |
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extern void DebugPrintf(const char *, ...); |
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140 |
|
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141 |
#ifdef _DEBUG_SYMBIAN_EH_SUPPORT |
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#define SYMBIAN_EH_SUPPORT_PRINTF DebugPrintf |
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143 |
#else |
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#define SYMBIAN_EH_SUPPORT_PRINTF (void) |
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#pragma diag_suppress 174 |
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146 |
#endif |
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147 |
|
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void InitialiseSymbianSpecificUnwinderCache(uint32_t addr, _Unwind_Control_Block * ucbp); |
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TExceptionDescriptor * ReLoadExceptionDescriptor(uint32_t addr,_Unwind_Control_Block * ucbp); |
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150 |
|
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/* Functions used to convert between segment-relative offsets |
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* and absolute addresses. These are only used in unwinder.c and must be |
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* compilable by a C compiler. |
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*/ |
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155 |
|
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static __inline void ValidateExceptionDescriptor(uint32_t addr, _Unwind_Control_Block * ucbp) |
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157 |
{ |
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// On entry assume ROM exception search table and exception descriptor for current frame cached in ucbp |
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159 |
|
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// see if addr is in current exception descriptor range |
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TExceptionDescriptor * aEDp = GET_EXCEPTION_DESCRIPTOR(ucbp); |
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if (!ADDRESS_IN_EXCEPTION_DESCRIPTOR_RANGE(addr, aEDp)) { |
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aEDp = ReLoadExceptionDescriptor(addr, ucbp); |
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// If there's no valid exception descriptor abort. |
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if (!aEDp) { |
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#ifdef _DEBUG |
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DebugPrintf("EH ERROR: no exception descriptor for address 0x%08x\n", addr); |
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DEBUGGER_BOTTLENECK(ucbp, _UASUBSYS_UNWINDER, _UAACT_ENDING, _UAARG_ENDING_UNWINDER_LOOKUPFAILED); |
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#endif |
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abort(); |
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} |
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} |
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} |
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174 |
|
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static __inline uint32_t addr_to_ER_RO_offset(uint32_t addr, _Unwind_Control_Block * ucbp) |
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176 |
{ |
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TExceptionDescriptor * aEDp = GET_EXCEPTION_DESCRIPTOR(ucbp); |
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// assume ucbp has the correct exception descriptor for this offset |
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return addr - GET_RO_BASE(aEDp); |
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} |
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181 |
|
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static __inline uint32_t ER_RO_offset_to_addr(uint32_t offset, _Unwind_Control_Block * ucbp) |
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183 |
{ |
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TExceptionDescriptor * aEDp = GET_EXCEPTION_DESCRIPTOR(ucbp); |
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// assume ucbp has the correct exception descriptor for this offset |
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return offset + GET_RO_BASE(aEDp); |
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} |
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188 |
|
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// This must be the same as the version in unwinder.c. However its structure is |
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// governed by the EHABI and so it shouldn't change anytime soon. |
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typedef struct __EIT_entry { |
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uint32_t fnoffset; /* Place-relative */ |
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uint32_t content; |
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} __EIT_entry; |
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195 |
|
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// The Symbian unwinder uses these specific search functions rather than the generic bsearch |
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// to find entries in the exception index table |
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const __EIT_entry *SearchEITV1(uint32_t return_address_offset, const __EIT_entry *base, unsigned int nelems); |
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__EIT_entry *SearchEITV2(uint32_t return_address, const __EIT_entry *base, unsigned int nelems); |
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200 |
|
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#ifdef __cplusplus |
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} |
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#endif |
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#endif // SYMBIAN_SUPPORT_H |
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