[Mingw-users] 64 bit pointers in 32 bit kernels

[Brian Hawley <bhawley@xxxxxxxxxxx>]

Perhaps someone has run across this before.

I'm porting a support library from unix to windows (i'm somewhat new to 
windows driver development).  I'm needing to substitute KeQuerySystemTime 
(since I'm using MinGW, and KeQuerySystemTime is defined in a header).

I was able to determine from the header file the mechanism for accessing 
the data.   However, I believe the pointer dereferencing is a problem.

The system is a 32 bit system and windows debugger shows 'ptr64 FALSE'.

So, code like the following does not work.  Instead the top 16 bits are 
truncated.

uint64_t *ptr = 0xFFFFF780000000014ULL;
uint64_t value = 0;

value = *ptr;

Any ideas?


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