// Copyright (c) 1997-2009 Nokia Corporation and/or its subsidiary(-ies).

// All rights reserved.

// This component and the accompanying materials are made available

// under the terms of "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:

// 

//

#include <setjmp.h>

#ifdef __CW32__

#define _asm asm

#endif

extern "C" {

EXPORT_C int setjmp(jmp_buf __jmpb)

	{

	// preamble does "push ebp; mov ebp,esp;"

	_asm mov eax, __jmpb

	_asm mov [eax],    ebx

	_asm mov [eax+4],  esi

	_asm mov [eax+8],  edi

	_asm mov [eax+12], ebp		// caller's ESP

	_asm mov [eax+16], ds

	_asm mov [eax+20], es

	_asm mov [eax+24], fs

	_asm mov [eax+28], gs

	_asm mov edx, [ebp]

	_asm mov [eax+32], edx		// caller's EBP

	_asm mov edx, [ebp+4]

	_asm mov [eax+36], edx		// return address EIP

	return(0);

	}

EXPORT_C void longjmp(jmp_buf __jmpb, int __retval)

	{

	__jmpb[10]= (__retval == 0) ? 1 : __retval;		// so we can return it after changing ESP/EBP

	_asm mov eax, __jmpb

	_asm mov ebp, [eax+12]

	_asm mov esp, ebp		// restore setjmp ESP (and leave EBP==ESP)

	_asm mov ebx, [eax]

	_asm mov esi, [eax+4]

	_asm mov edi, [eax+8]

	_asm mov ds, [eax+16]

	_asm mov es, [eax+20]

	_asm mov fs, [eax+24]

	_asm mov gs, [eax+28]

	_asm mov edx, [eax+32]

	_asm mov [ebp], edx		// put setjmp caller's EBP back into stack

	_asm mov edx, [eax+36]

	_asm mov [ebp+4], edx		// put setjmp caller's EIP back into stack

	_asm mov eax, [eax+40]

	_asm pop ebp

	_asm ret 

	}

} // extern "C"