sl@0: // Copyright (c) 1995-2009 Nokia Corporation and/or its subsidiary(-ies).
sl@0: // All rights reserved.
sl@0: // This component and the accompanying materials are made available
sl@0: // under the terms of the License "Eclipse Public License v1.0"
sl@0: // which accompanies this distribution, and is available
sl@0: // at the URL "http://www.eclipse.org/legal/epl-v10.html".
sl@0: //
sl@0: // Initial Contributors:
sl@0: // Nokia Corporation - initial contribution.
sl@0: //
sl@0: // Contributors:
sl@0: //
sl@0: // Description:
sl@0: // e32\euser\epoc\arm\uc_exe.cia
sl@0: // 
sl@0: //
sl@0: 
sl@0: #include <e32cia.h>
sl@0: #include <u32std.h>
sl@0: // Include this to get imports from User (i.e. User::Invariant and User::HandleException). 
sl@0: // This sets VISIBILITY to DEFAULT for BPABI builds.
sl@0: #include <e32std.h>
sl@0: 
sl@0: extern "C" {
sl@0: 
sl@0: void _xxxx_call_user_invariant();
sl@0: void _xxxx_call_user_handle_exception(void *);
sl@0: 
sl@0: extern void RunThread(TBool aNotFirst, SThreadCreateInfo& aInfo);
sl@0: 
sl@0: // NOTE: This MUST be the first function in this module
sl@0: __NAKED__ TInt _E32Startup()
sl@0: 	{
sl@0: 	// Process entry point
sl@0: 	// R4 = entry reason
sl@0: 	// SP points to information block
sl@0: 	EKA2_ENTRY_POINT_VERSION_IDENTIFIER;	// DUMMY INSTRUCTION TO INDICATE EKA2 ENTRY POINT
sl@0: 	asm("cmp r4, #%a0" : : "i" ((TInt)KModuleEntryReasonThreadInit) );
sl@0: 	asm("b 1f ");				// branch over space for unique ID
sl@0: 
sl@0: 	asm(".word 0 ");			// loader will replace with code seg unique ID
sl@0: 								// for RAM-loaded code segment
sl@0: 								// MUST BE AT OFFSET 12 FROM ENTRY POINT
sl@0: 
sl@0: 	asm("1: ");
sl@0: 	asm("movls r0, r4 ");		// r0 = aNotFirst
sl@0: 	asm("movls r1, sp ");		// r1 -> parameter block
sl@0: 	asm("bls RunThread ");		// process or thread init
sl@0: 	asm("cmp r4, #%a0" : : "i" ((TInt)KModuleEntryReasonException) );
sl@0: //  	asm("bne " CSM_ZN4User9InvariantEv );	// invalid entry reason
sl@0:   	asm("bne _xxxx_call_user_invariant " );	// invalid entry reason
sl@0: 
sl@0: 	// exception entry
sl@0: 	// NOTE: THUMB only works on ARMv5 and above
sl@0: 	asm("mov r0, sp ");			// r0->parameter block
sl@0: 	asm("ldr r4, [sp, #16]");	// r4 = saved CPSR
sl@0: 	asm("tst r4, #0x20 ");		// test for THUMB
sl@0: 	asm("ldrne r1, [sp, #80] ");	// r1 = saved return addr
sl@0: 	asm("orrne r1, r1, #1 ");
sl@0: 	asm("strne r1, [sp, #80] ");	// if THUMB, set bit 0 of return addr
sl@0: 
sl@0: 	asm("mov r11, sp ");		// save stack pointer
sl@0: 
sl@0: 	// The frame starts 84 bytes (up) from r11 i.e. CFA is r11 + 84
sl@0: 	__EH_FRAME_ADDRESS(r11, 84)
sl@0: 	// we can only restore callee-save values, but that's what we want if we 'leave'
sl@0: 	// saved link is -8 bytes from CFA (= r11 + 0x24 + 0x20 + 0x8)
sl@0: 	__EH_FRAME_SAVE1(lr, -8)
sl@0: 
sl@0: 	// the other callee saves start at -48 from CFA (= r11 + 0x24)
sl@0: #if 0
sl@0: 	// would like to say this 
sl@0: 	__EH_FRAME_SAVE1(r4-r11, -48)
sl@0: 	// but the macro expansion gives rise to odd code so we do what follows
sl@0: #endif
sl@0: #ifdef __ARMCC__
sl@0: 	FRAME SAVE {r4-r11}, -48
sl@0: #endif
sl@0: 
sl@0: 	asm("bic sp, sp, #4 ");		// align stack to 8 byte boundary
sl@0: //  	asm("bl " CSM_ZN4User15HandleExceptionEPv );
sl@0:   	asm("bl _xxxx_call_user_handle_exception ");
sl@0: 	asm("add sp, r11, #16 ");	// skip exc type, exc code, FAR, FSR
sl@0: 	asm("ldr r4, [sp], #4 ");	// r4 = saved CPSR
sl@0: 	asm("bic r4, r4, #0x20 ");	// clear THUMB bit
sl@0: 	asm("msr cpsr, r4 ");		// restore flags
sl@0: 	asm("ldmia sp, {r0-r15} ");	// restore r0-r15
sl@0: 
sl@0: #ifdef __ARMCC__
sl@0: #ifdef __SUPPORT_CPP_EXCEPTIONS__
sl@0: 
sl@0: 
sl@0:   /* It is possible no functions included in the image require
sl@0:    * a handler table. Therefore make only a weak reference to
sl@0:    * the handler table base symbol, which may be absent.
sl@0:    */
sl@0:   extern |.ARM.exidx$$Base|;
sl@0:   extern |.ARM.exidx$$Limit|;
sl@0:   extern |.ARM.extab$$Base| [WEAK];
sl@0:   extern |Image$$ER_RO$$Base|;
sl@0:   extern |Image$$ER_RO$$Limit|;
sl@0:   export |Symbian$$CPP$$Exception$$Descriptor|;
sl@0: 
sl@0: |Symbian$$CPP$$Exception$$Descriptor|
sl@0: #ifdef __LEAVE_EQUALS_THROW__
sl@0: |Symbian$$eit_base|  		dcd |.ARM.exidx$$Base|;   /* index table base */
sl@0: |Symbian$$eit_limit|  		dcd |.ARM.exidx$$Limit| ;  /* index table limit */
sl@0: #endif
sl@0: #if __ARMCC_VERSION > 220000
sl@0: |Symbian$$code_seg_base| 	dcd |Image$$ER_RO$$Base| + 1 ; /* RO segment base + mark as ehabi v2 */
sl@0: |Symbian$$code_seg_limit| 	dcd |Image$$ER_RO$$Limit| ;/* RO segment limit */
sl@0: |Symbian$$reserved|		dcd 0 ; /* reserved for future use */
sl@0: #else
sl@0: |Symbian$$code_seg_base| 	dcd |Image$$ER_RO$$Base| ; /* RO segment base */
sl@0: |Symbian$$code_seg_limit| 	dcd |Image$$ER_RO$$Limit| ;/* RO segment limit */
sl@0: #endif
sl@0: 
sl@0: #endif
sl@0: #endif
sl@0: 
sl@0: 	}
sl@0: void _xxxx_call_user_invariant() { User::Invariant(); }
sl@0: void _xxxx_call_user_handle_exception(void * arg) { User::HandleException(arg); }
sl@0: 
sl@0: }
sl@0: