root/platform/win32/win32setjmp.cpp

/* ***** BEGIN LICENSE BLOCK *****
 * Version: MPL 1.1/GPL 2.0/LGPL 2.1
 *
 * The contents of this file are subject to the Mozilla Public License Version
 * 1.1 (the "License"); you may not use this file except in compliance with
 * the License. You may obtain a copy of the License at
 * http://www.mozilla.org/MPL/
 *
 * Software distributed under the License is distributed on an "AS IS" basis,
 * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
 * for the specific language governing rights and limitations under the
 * License.
 *
 * The Original Code is [Open Source Virtual Machine.].
 *
 * The Initial Developer of the Original Code is
 * Adobe System Incorporated.
 * Portions created by the Initial Developer are Copyright (C) 2004-2006
 * the Initial Developer. All Rights Reserved.
 *
 * Contributor(s):
 *   Adobe AS3 Team
 *
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 * either the GNU General Public License Version 2 or later (the "GPL"), or
 * the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
 * in which case the provisions of the GPL or the LGPL are applicable instead
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 * ***** END LICENSE BLOCK ***** */

#include "avmplus.h"
#include <setjmp.h>


extern "C"
{
        __declspec(naked)
        int __cdecl _setjmp3(jmp_buf /*jmpbuf*/, int /*arg*/)
        {
                _asm
                {
                        mov edx, [esp+4]
                        mov DWORD PTR [edx],ebp
                        mov DWORD PTR [edx+4],ebx
                        mov DWORD PTR [edx+8],edi
                        mov DWORD PTR [edx+12],esi
                        mov DWORD PTR [edx+16],esp
                        mov eax, DWORD PTR [esp]
                        mov DWORD PTR [edx+20],eax
                        mov DWORD PTR [edx+24],0xFFFFFFFF
                        mov DWORD PTR [edx+28],0xFFFFFFFF
                        mov DWORD PTR [edx+32],0x56433230
                        mov DWORD PTR [edx+36],0
                        sub eax,eax
                        ret
                }
        }

        // Disable the "ebp was modified" warning.
        // We really do want to modify it.
    #pragma warning ( disable : 4731 )
    
    // flow in or out of inline asm code suppresses global optimization
        #pragma warning ( disable : 4740 )

        __declspec(noreturn)
        void __cdecl longjmp(jmp_buf jmpbuf, int result)
        {
                _asm
                {
                        mov edx,[jmpbuf]
                        mov eax,[result]
                        mov ebp,DWORD PTR [edx]
                        mov ebx,DWORD PTR [edx+4]
                        mov edi,DWORD PTR [edx+8]
                        mov esi,DWORD PTR [edx+12]
                        mov esp,DWORD PTR [edx+16]
                        add esp,4
                        jmp DWORD PTR [edx+20]
                }
        }

        #pragma warning ( default : 4740 )              
}