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// Copyright (c) 1997-2009 Nokia Corporation and/or its subsidiary(-ies).
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// All rights reserved.
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// This component and the accompanying materials are made available
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// under the terms of "Eclipse Public License v1.0"
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// which accompanies this distribution, and is available
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// at the URL "http://www.eclipse.org/legal/epl-v10.html".
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//
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// Initial Contributors:
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// Nokia Corporation - initial contribution.
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//
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// Contributors:
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//
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// Description:
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//
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#include <setjmp.h>
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#ifdef __CW32__
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#define _asm asm
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#endif
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extern "C" {
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EXPORT_C int setjmp(jmp_buf __jmpb)
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{
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// preamble does "push ebp; mov ebp,esp;"
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_asm mov eax, __jmpb
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_asm mov [eax], ebx
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_asm mov [eax+4], esi
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_asm mov [eax+8], edi
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_asm mov [eax+12], ebp // caller's ESP
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_asm mov [eax+16], ds
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_asm mov [eax+20], es
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_asm mov [eax+24], fs
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_asm mov [eax+28], gs
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_asm mov edx, [ebp]
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_asm mov [eax+32], edx // caller's EBP
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_asm mov edx, [ebp+4]
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_asm mov [eax+36], edx // return address EIP
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return(0);
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}
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EXPORT_C void longjmp(jmp_buf __jmpb, int __retval)
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{
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__jmpb[10]= (__retval == 0) ? 1 : __retval; // so we can return it after changing ESP/EBP
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_asm mov eax, __jmpb
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_asm mov ebp, [eax+12]
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_asm mov esp, ebp // restore setjmp ESP (and leave EBP==ESP)
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_asm mov ebx, [eax]
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_asm mov esi, [eax+4]
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_asm mov edi, [eax+8]
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_asm mov ds, [eax+16]
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_asm mov es, [eax+20]
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_asm mov fs, [eax+24]
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_asm mov gs, [eax+28]
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_asm mov edx, [eax+32]
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_asm mov [ebp], edx // put setjmp caller's EBP back into stack
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_asm mov edx, [eax+36]
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_asm mov [ebp+4], edx // put setjmp caller's EIP back into stack
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_asm mov eax, [eax+40]
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_asm pop ebp
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_asm ret
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}
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} // extern "C" |