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Index > Windows > Changing section flags at run-time

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vid
Verbosity in development


Joined: 05 Sep 2003
Posts: 7105
Location: Slovakia
vid
Hi, i need to change flags for one PE section during executing file.

Problem is that block of memory is read-only on NT.

It also has to work on all winodows versions (95 and later)

I could use VirtualProctectEx to allow write to the memory... but is someone aware of some better solution?

thanks
Post 13 May 2006, 07:55
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f0dder



Joined: 19 Feb 2004
Posts: 3170
Location: Denmark
f0dder
VirtualProtect(Ex) *is* the best solution - it's documented and works on both 9x and NT. You won't be able to change the pagetables directly anyway. If you want to do it with syscalls, you'll end up writing a lot of different versions (9x, NT, NT-with-SYSCALL-instruction and so on).

If your concern about calling VirtualProtect is from a security point, don't bother. It's easy to set a memory-range breakpoint.
Post 13 May 2006, 10:17
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