[Bug 5874] New: Programs compiled with MinGW's gcj crash because the stack is not executable

[Wine Bugs]

http://bugs.winehq.org/show_bug.cgi?id=5874

           Summary: Programs compiled with MinGW's gcj crash because the
                    stack is not executable
           Product: Wine
           Version: CVS
          Platform: PC
               URL: http://www.mingw.org/download.shtml
        OS/Version: Linux
            Status: NEW
          Keywords: regression
          Severity: normal
          Priority: P2
         Component: wine-kernel
        AssignedTo: wine-bugs at winehq.org
        ReportedBy: hallo at michael-kaufmann.ch


With Wine 0.9.18 and MinGW's gcj 3.4.5, all compiled programs crash immediately
with this message:

err:seh:raise_exception Unhandled exception code c0000005 flags 0 addr 0x2bbf64

This is a regression caused by the patch: "Don't require execute permission for
thread stacks", http://www.winehq.org/pipermail/wine-cvs/2005-June/016307.html

This bug disappears after reverting the patch. It's quite strange, because my PC
can't detect write accesses to non-executable stack pages: The CPU is too old to
support that (a Pentium III) and my kernel doesn't contain additional patches
like PaX ( http://en.wikipedia.org/wiki/PaX ).

To test this, you may download a test executable compiled with gcj:
http://www.michael-kaufmann.ch/Wine/GCJ.zip

To compile a test program with gcj yourself, download these MinGW packages at
http://www.mingw.org/download.shtml and extract them in the same directory:
gcc-core, gcc-java, binutils, MinGW Runtime. The command line is "gcj
--main=Test Test.java -o Test.exe".

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