1.1 --- /dev/null	Thu Jan 01 00:00:00 1970 +0000
     1.2 +++ b/os/kernelhwsrv/kernel/eka/euser/epoc/arm/uc_exe.cia	Fri Jun 15 03:10:57 2012 +0200
     1.3 @@ -0,0 +1,126 @@
     1.4 +// Copyright (c) 1995-2009 Nokia Corporation and/or its subsidiary(-ies).
     1.5 +// All rights reserved.
     1.6 +// This component and the accompanying materials are made available
     1.7 +// under the terms of the License "Eclipse Public License v1.0"
     1.8 +// which accompanies this distribution, and is available
     1.9 +// at the URL "http://www.eclipse.org/legal/epl-v10.html".
    1.10 +//
    1.11 +// Initial Contributors:
    1.12 +// Nokia Corporation - initial contribution.
    1.13 +//
    1.14 +// Contributors:
    1.15 +//
    1.16 +// Description:
    1.17 +// e32\euser\epoc\arm\uc_exe.cia
    1.18 +// 
    1.19 +//
    1.20 +
    1.21 +#include <e32cia.h>
    1.22 +#include <u32std.h>
    1.23 +// Include this to get imports from User (i.e. User::Invariant and User::HandleException). 
    1.24 +// This sets VISIBILITY to DEFAULT for BPABI builds.
    1.25 +#include <e32std.h>
    1.26 +
    1.27 +extern "C" {
    1.28 +
    1.29 +void _xxxx_call_user_invariant();
    1.30 +void _xxxx_call_user_handle_exception(void *);
    1.31 +
    1.32 +extern void RunThread(TBool aNotFirst, SThreadCreateInfo& aInfo);
    1.33 +
    1.34 +// NOTE: This MUST be the first function in this module
    1.35 +__NAKED__ TInt _E32Startup()
    1.36 +	{
    1.37 +	// Process entry point
    1.38 +	// R4 = entry reason
    1.39 +	// SP points to information block
    1.40 +	EKA2_ENTRY_POINT_VERSION_IDENTIFIER;	// DUMMY INSTRUCTION TO INDICATE EKA2 ENTRY POINT
    1.41 +	asm("cmp r4, #%a0" : : "i" ((TInt)KModuleEntryReasonThreadInit) );
    1.42 +	asm("b 1f ");				// branch over space for unique ID
    1.43 +
    1.44 +	asm(".word 0 ");			// loader will replace with code seg unique ID
    1.45 +								// for RAM-loaded code segment
    1.46 +								// MUST BE AT OFFSET 12 FROM ENTRY POINT
    1.47 +
    1.48 +	asm("1: ");
    1.49 +	asm("movls r0, r4 ");		// r0 = aNotFirst
    1.50 +	asm("movls r1, sp ");		// r1 -> parameter block
    1.51 +	asm("bls RunThread ");		// process or thread init
    1.52 +	asm("cmp r4, #%a0" : : "i" ((TInt)KModuleEntryReasonException) );
    1.53 +//  	asm("bne " CSM_ZN4User9InvariantEv );	// invalid entry reason
    1.54 +  	asm("bne _xxxx_call_user_invariant " );	// invalid entry reason
    1.55 +
    1.56 +	// exception entry
    1.57 +	// NOTE: THUMB only works on ARMv5 and above
    1.58 +	asm("mov r0, sp ");			// r0->parameter block
    1.59 +	asm("ldr r4, [sp, #16]");	// r4 = saved CPSR
    1.60 +	asm("tst r4, #0x20 ");		// test for THUMB
    1.61 +	asm("ldrne r1, [sp, #80] ");	// r1 = saved return addr
    1.62 +	asm("orrne r1, r1, #1 ");
    1.63 +	asm("strne r1, [sp, #80] ");	// if THUMB, set bit 0 of return addr
    1.64 +
    1.65 +	asm("mov r11, sp ");		// save stack pointer
    1.66 +
    1.67 +	// The frame starts 84 bytes (up) from r11 i.e. CFA is r11 + 84
    1.68 +	__EH_FRAME_ADDRESS(r11, 84)
    1.69 +	// we can only restore callee-save values, but that's what we want if we 'leave'
    1.70 +	// saved link is -8 bytes from CFA (= r11 + 0x24 + 0x20 + 0x8)
    1.71 +	__EH_FRAME_SAVE1(lr, -8)
    1.72 +
    1.73 +	// the other callee saves start at -48 from CFA (= r11 + 0x24)
    1.74 +#if 0
    1.75 +	// would like to say this 
    1.76 +	__EH_FRAME_SAVE1(r4-r11, -48)
    1.77 +	// but the macro expansion gives rise to odd code so we do what follows
    1.78 +#endif
    1.79 +#ifdef __ARMCC__
    1.80 +	FRAME SAVE {r4-r11}, -48
    1.81 +#endif
    1.82 +
    1.83 +	asm("bic sp, sp, #4 ");		// align stack to 8 byte boundary
    1.84 +//  	asm("bl " CSM_ZN4User15HandleExceptionEPv );
    1.85 +  	asm("bl _xxxx_call_user_handle_exception ");
    1.86 +	asm("add sp, r11, #16 ");	// skip exc type, exc code, FAR, FSR
    1.87 +	asm("ldr r4, [sp], #4 ");	// r4 = saved CPSR
    1.88 +	asm("bic r4, r4, #0x20 ");	// clear THUMB bit
    1.89 +	asm("msr cpsr, r4 ");		// restore flags
    1.90 +	asm("ldmia sp, {r0-r15} ");	// restore r0-r15
    1.91 +
    1.92 +#ifdef __ARMCC__
    1.93 +#ifdef __SUPPORT_CPP_EXCEPTIONS__
    1.94 +
    1.95 +
    1.96 +  /* It is possible no functions included in the image require
    1.97 +   * a handler table. Therefore make only a weak reference to
    1.98 +   * the handler table base symbol, which may be absent.
    1.99 +   */
   1.100 +  extern |.ARM.exidx$$Base|;
   1.101 +  extern |.ARM.exidx$$Limit|;
   1.102 +  extern |.ARM.extab$$Base| [WEAK];
   1.103 +  extern |Image$$ER_RO$$Base|;
   1.104 +  extern |Image$$ER_RO$$Limit|;
   1.105 +  export |Symbian$$CPP$$Exception$$Descriptor|;
   1.106 +
   1.107 +|Symbian$$CPP$$Exception$$Descriptor|
   1.108 +#ifdef __LEAVE_EQUALS_THROW__
   1.109 +|Symbian$$eit_base|  		dcd |.ARM.exidx$$Base|;   /* index table base */
   1.110 +|Symbian$$eit_limit|  		dcd |.ARM.exidx$$Limit| ;  /* index table limit */
   1.111 +#endif
   1.112 +#if __ARMCC_VERSION > 220000
   1.113 +|Symbian$$code_seg_base| 	dcd |Image$$ER_RO$$Base| + 1 ; /* RO segment base + mark as ehabi v2 */
   1.114 +|Symbian$$code_seg_limit| 	dcd |Image$$ER_RO$$Limit| ;/* RO segment limit */
   1.115 +|Symbian$$reserved|		dcd 0 ; /* reserved for future use */
   1.116 +#else
   1.117 +|Symbian$$code_seg_base| 	dcd |Image$$ER_RO$$Base| ; /* RO segment base */
   1.118 +|Symbian$$code_seg_limit| 	dcd |Image$$ER_RO$$Limit| ;/* RO segment limit */
   1.119 +#endif
   1.120 +
   1.121 +#endif
   1.122 +#endif
   1.123 +
   1.124 +	}
   1.125 +void _xxxx_call_user_invariant() { User::Invariant(); }
   1.126 +void _xxxx_call_user_handle_exception(void * arg) { User::HandleException(arg); }
   1.127 +
   1.128 +}
   1.129 +