sl@0: // Copyright (c) 1997-2009 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 "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: //
sl@0: 
sl@0: #include <setjmp.h>
sl@0: 
sl@0: #ifdef __CW32__
sl@0: #define _asm asm
sl@0: #endif
sl@0: 
sl@0: extern "C" {
sl@0: 
sl@0: EXPORT_C int setjmp(jmp_buf __jmpb)
sl@0: 	{
sl@0: 	// preamble does "push ebp; mov ebp,esp;"
sl@0: 	_asm mov eax, __jmpb
sl@0: 	_asm mov [eax],    ebx
sl@0: 	_asm mov [eax+4],  esi
sl@0: 	_asm mov [eax+8],  edi
sl@0: 	_asm mov [eax+12], ebp		// caller's ESP
sl@0: 	_asm mov [eax+16], ds
sl@0: 	_asm mov [eax+20], es
sl@0: 	_asm mov [eax+24], fs
sl@0: 	_asm mov [eax+28], gs
sl@0: 	_asm mov edx, [ebp]
sl@0: 	_asm mov [eax+32], edx		// caller's EBP
sl@0: 	_asm mov edx, [ebp+4]
sl@0: 	_asm mov [eax+36], edx		// return address EIP
sl@0: 	return(0);
sl@0: 	}
sl@0: 
sl@0: EXPORT_C void longjmp(jmp_buf __jmpb, int __retval)
sl@0: 	{
sl@0: 	__jmpb[10]= (__retval == 0) ? 1 : __retval;		// so we can return it after changing ESP/EBP
sl@0: 	_asm mov eax, __jmpb
sl@0: 	_asm mov ebp, [eax+12]
sl@0: 	_asm mov esp, ebp		// restore setjmp ESP (and leave EBP==ESP)
sl@0: 	_asm mov ebx, [eax]
sl@0: 	_asm mov esi, [eax+4]
sl@0: 	_asm mov edi, [eax+8]
sl@0: 	_asm mov ds, [eax+16]
sl@0: 	_asm mov es, [eax+20]
sl@0: 	_asm mov fs, [eax+24]
sl@0: 	_asm mov gs, [eax+28]
sl@0: 	_asm mov edx, [eax+32]
sl@0: 	_asm mov [ebp], edx		// put setjmp caller's EBP back into stack
sl@0: 	_asm mov edx, [eax+36]
sl@0: 	_asm mov [ebp+4], edx		// put setjmp caller's EIP back into stack
sl@0: 	_asm mov eax, [eax+40]
sl@0: 	_asm pop ebp
sl@0: 	_asm ret 
sl@0: 	}
sl@0: 
sl@0: } // extern "C"