[ros-kernel] NtProtectVirtualMemory() is needed to run MSVC++ apps

[Eric K. <ek...@rz...>]

Hi!

I just found out why application compiled with MSVC++ don't run on ReactOS.

These apps have a slighly different layout compared to apps compiled with
MinGW. MSVC++ stores the IAT (Import Address Table) inside of the .rdata
section, MinGW stores the IAT inside of the .data section. Now the problem
is that the .rdata setion is read-only. To fix-up the IAT of an application
the offsets stored in the IAT must be overwritten by the real import
addresses. Obviously this wont work if the IAT is inside of a read-only
section.

To fix this bug I added calls to NtProtectVirtualMemory() to the fixup
routine to change the IAT's protection to read-write before it is modified
and reset its protection after the fixup is done.

When I had a look at NtProtectVirtualMemory() I saw that its core
functionality is disabled. What's wrong?


Regards,
Eric

Eric