[PATCH] Re: READ-ONLY mmap not present in core

[Pavel Krauz]

> I have verified that the READ_ONLY mmap mapping of file did not propagate 
> to core file.

Here goes a patch that solves the problem. The READ_ONLY - only mappings are now included to the core file. The executable regions are still excluded. The size of core
did not change a lot and you have all important info in core and don't get 
unreferencable pointers inside a debugger.

Please apply to 2.4.X and 2.6.X also
Pavel


with patch (emacs, netscape, xemacs):
4706304 core.all.emacs
9129984 core.all.netscape
5726208 core.all.xemacs

without patch:
4452352 core.emacs
8851456 core.netscape
5459968 core.xemacs


--- linux/fs/binfmt_elf.c.bak   Tue Oct 21 15:21:13 2003
+++ linux/fs/binfmt_elf.c       Tue Oct 21 15:21:18 2003
@@ -952,7 +952,7 @@
 #if 1
        if (vma->vm_flags & (VM_WRITE|VM_GROWSUP|VM_GROWSDOWN))
                return 1;
-       if (vma->vm_flags & (VM_READ|VM_EXEC|VM_EXECUTABLE|VM_SHARED))
+       if (vma->vm_flags & (VM_EXEC|VM_EXECUTABLE))
                return 0;
 #endif
        return 1;




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