reading the EPROCESS struct

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hello,
I'm working with windows 7. I wrote a driver to get the EPROCESS struct of my process.

C++

PEPROCESS  EP = NULL;
.....
.....
.....
status = PsLookupProcessByProcessId((HANDLE)pid, &EP);

the status is returned as NT_SUCCESS.
but I got an error when I tried to access any field of this struct.
like the following:

C++

peb = (DWORD)EP->Peb;

the error was:

" left of 'Peb' specifies undefined struct/union '_EPROCESS' "

I don't know whay I got this error and how to solve it??

thanks for helping.

Posted 6-Dec-11 6:10am

nadia_tarik

Updated 6-Dec-11 6:11am

Wendelius

v2

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2 solutions

Solution 1

Your code suggests that EP is a pointer type, but it is not obvious from it's declaration that it is. Perhaps your code should be

peb = (DWORD)EP.Peb;

Posted 6-Dec-11 6:39am

Chris Meech

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nadia_tarik 8-Dec-11 6:58am

Thank you for replaying.

EP is of pointer type, because PEPROCESS is of type _EPROCESS * as defined in the ntddk.h. and I try the solution of dot operator before but there still an error.

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Efri · Accepted Answer · 2013-04-22T00:14:00

Solution 2

This is an "opaque" struct. YOU SHOULD NOT access it directly.

But if you want to learn (never in a real product) you can view at the fields and displacements, and build your "own" per os version of the struct using windbg....

Posted 22-Apr-13 0:14am

Efri

Comments

nadia_tarik 27-Apr-13 15:48pm

thank you