os/kernelhwsrv/kernel/eka/euser/epoc/arm/uc_dll.cia
author sl
Tue, 10 Jun 2014 14:32:02 +0200
changeset 1 260cb5ec6c19
permissions -rw-r--r--
Update contrib.
     1 // Copyright (c) 2003-2009 Nokia Corporation and/or its subsidiary(-ies).
     2 // All rights reserved.
     3 // This component and the accompanying materials are made available
     4 // under the terms of the License "Eclipse Public License v1.0"
     5 // which accompanies this distribution, and is available
     6 // at the URL "http://www.eclipse.org/legal/epl-v10.html".
     7 //
     8 // Initial Contributors:
     9 // Nokia Corporation - initial contribution.
    10 //
    11 // Contributors:
    12 //
    13 // Description:
    14 // e32\euser\epoc\arm\uc_dll.cia
    15 // 
    16 //
    17 
    18 #include <e32cia.h>
    19 #include <u32std.h>
    20 
    21 extern "C" {
    22 
    23 extern TInt _E32Dll_Body(TInt);
    24 
    25 __NAKED__ TInt _E32Dll(TInt /*aReason*/)
    26 	{
    27 	// DLL entry point
    28 	EKA2_ENTRY_POINT_VERSION_IDENTIFIER;	// DUMMY INSTRUCTION TO INDICATE EKA2 ENTRY POINT
    29 	asm("ldr r12, 1f ");
    30 	__JUMP(,r12);
    31 
    32 	asm(".word 0 ");			// loader will replace with code seg unique ID
    33 								// for RAM-loaded code segment
    34 								// MUST BE AT OFFSET 12 FROM ENTRY POINT
    35 
    36 	asm("1: ");
    37 	asm(".word _E32Dll_Body ");
    38 
    39 #ifdef __ARMCC__
    40 #ifdef __SUPPORT_CPP_EXCEPTIONS__
    41 
    42 
    43   /* It is possible no functions included in the image require
    44    * a handler table. Therefore make only a weak reference to
    45    * the handler table base symbol, which may be absent.
    46    */
    47   extern |.ARM.exidx$$Base|;
    48   extern |.ARM.exidx$$Limit|;
    49   extern |.ARM.extab$$Base| [WEAK];
    50   extern |Image$$ER_RO$$Base|;
    51   extern |Image$$ER_RO$$Limit|;
    52   export |Symbian$$CPP$$Exception$$Descriptor|;
    53 
    54   /* Symbian$$CPP$$Exception$$Descriptor is referenced from the Image header.
    55    * A pointer to this object can be cached by the unwinder in the UCB
    56    * on the assumption that the EHT for the previous frame is likely to be right
    57    * for the current frame
    58    */
    59 
    60 |Symbian$$CPP$$Exception$$Descriptor|
    61 #ifdef __LEAVE_EQUALS_THROW__
    62 |Symbian$$eit_base|  		dcd |.ARM.exidx$$Base|;   /* index table base */
    63 |Symbian$$eit_limit|  		dcd |.ARM.exidx$$Limit| ;  /* index table limit */
    64 #endif
    65 #if __ARMCC_VERSION > 220000
    66 |Symbian$$code_seg_base| 	dcd |Image$$ER_RO$$Base| + 1 ; /* RO segment base + mark as ehabi v2 */
    67 |Symbian$$code_seg_limit| 	dcd |Image$$ER_RO$$Limit| ;/* RO segment limit */
    68 |Symbian$$reserved|		dcd 0 ; /* reserved for future use */
    69 #else
    70 |Symbian$$code_seg_base| 	dcd |Image$$ER_RO$$Base| ; /* RO segment base */
    71 |Symbian$$code_seg_limit| 	dcd |Image$$ER_RO$$Limit| ;/* RO segment limit */
    72 #endif
    73 
    74 #endif
    75 #endif
    76 	}
    77 }
    78