// Copyright (c) 1995-2009 Nokia Corporation and/or its subsidiary(-ies).

// All rights reserved.

// This component and the accompanying materials are made available

// under the terms of the License "Eclipse Public License v1.0"

// which accompanies this distribution, and is available

// at the URL "http://www.eclipse.org/legal/epl-v10.html".

//

// Initial Contributors:

// Nokia Corporation - initial contribution.

//

// Contributors:

//

// Description:

// e32\euser\epoc\arm\uc_exe.cia

// 

//

#include <e32cia.h>

#include <u32std.h>

// Include this to get imports from User (i.e. User::Invariant and User::HandleException). 

// This sets VISIBILITY to DEFAULT for BPABI builds.

#include <e32std.h>

extern "C" {

void _xxxx_call_user_invariant();

void _xxxx_call_user_handle_exception(void *);

extern void RunThread(TBool aNotFirst, SThreadCreateInfo& aInfo);

// NOTE: This MUST be the first function in this module

__NAKED__ TInt _E32Startup()

	{

	// Process entry point

	// R4 = entry reason

	// SP points to information block

	EKA2_ENTRY_POINT_VERSION_IDENTIFIER;	// DUMMY INSTRUCTION TO INDICATE EKA2 ENTRY POINT

	asm("cmp r4, #%a0" : : "i" ((TInt)KModuleEntryReasonThreadInit) );

	asm("b 1f ");				// branch over space for unique ID

	asm(".word 0 ");			// loader will replace with code seg unique ID

								// for RAM-loaded code segment

								// MUST BE AT OFFSET 12 FROM ENTRY POINT

	asm("1: ");

	asm("movls r0, r4 ");		// r0 = aNotFirst

	asm("movls r1, sp ");		// r1 -> parameter block

	asm("bls RunThread ");		// process or thread init

	asm("cmp r4, #%a0" : : "i" ((TInt)KModuleEntryReasonException) );

//  	asm("bne " CSM_ZN4User9InvariantEv );	// invalid entry reason

  	asm("bne _xxxx_call_user_invariant " );	// invalid entry reason

	// exception entry

	// NOTE: THUMB only works on ARMv5 and above

	asm("mov r0, sp ");			// r0->parameter block

	asm("ldr r4, [sp, #16]");	// r4 = saved CPSR

	asm("tst r4, #0x20 ");		// test for THUMB

	asm("ldrne r1, [sp, #80] ");	// r1 = saved return addr

	asm("orrne r1, r1, #1 ");

	asm("strne r1, [sp, #80] ");	// if THUMB, set bit 0 of return addr

	asm("mov r11, sp ");		// save stack pointer

	// The frame starts 84 bytes (up) from r11 i.e. CFA is r11 + 84

	__EH_FRAME_ADDRESS(r11, 84)

	// we can only restore callee-save values, but that's what we want if we 'leave'

	// saved link is -8 bytes from CFA (= r11 + 0x24 + 0x20 + 0x8)

	__EH_FRAME_SAVE1(lr, -8)

	// the other callee saves start at -48 from CFA (= r11 + 0x24)

#if 0

	// would like to say this 

	__EH_FRAME_SAVE1(r4-r11, -48)

	// but the macro expansion gives rise to odd code so we do what follows

#endif

#ifdef __ARMCC__

	FRAME SAVE {r4-r11}, -48

#endif

	asm("bic sp, sp, #4 ");		// align stack to 8 byte boundary

//  	asm("bl " CSM_ZN4User15HandleExceptionEPv );

  	asm("bl _xxxx_call_user_handle_exception ");

	asm("add sp, r11, #16 ");	// skip exc type, exc code, FAR, FSR

	asm("ldr r4, [sp], #4 ");	// r4 = saved CPSR

	asm("bic r4, r4, #0x20 ");	// clear THUMB bit

	asm("msr cpsr, r4 ");		// restore flags

	asm("ldmia sp, {r0-r15} ");	// restore r0-r15

#ifdef __ARMCC__

#ifdef __SUPPORT_CPP_EXCEPTIONS__

  /* It is possible no functions included in the image require

   * a handler table. Therefore make only a weak reference to

   * the handler table base symbol, which may be absent.

   */

  extern |.ARM.exidx$$Base|;

  extern |.ARM.exidx$$Limit|;

  extern |.ARM.extab$$Base| [WEAK];

  extern |Image$$ER_RO$$Base|;

  extern |Image$$ER_RO$$Limit|;

  export |Symbian$$CPP$$Exception$$Descriptor|;

|Symbian$$CPP$$Exception$$Descriptor|

#ifdef __LEAVE_EQUALS_THROW__

|Symbian$$eit_base|  		dcd |.ARM.exidx$$Base|;   /* index table base */

|Symbian$$eit_limit|  		dcd |.ARM.exidx$$Limit| ;  /* index table limit */

#endif

#if __ARMCC_VERSION > 220000

|Symbian$$code_seg_base| 	dcd |Image$$ER_RO$$Base| + 1 ; /* RO segment base + mark as ehabi v2 */

|Symbian$$code_seg_limit| 	dcd |Image$$ER_RO$$Limit| ;/* RO segment limit */

|Symbian$$reserved|		dcd 0 ; /* reserved for future use */

#else

|Symbian$$code_seg_base| 	dcd |Image$$ER_RO$$Base| ; /* RO segment base */

|Symbian$$code_seg_limit| 	dcd |Image$$ER_RO$$Limit| ;/* RO segment limit */

#endif

#endif

#endif

	}

void _xxxx_call_user_invariant() { User::Invariant(); }

void _xxxx_call_user_handle_exception(void * arg) { User::HandleException(arg); }

}