Unreal Software - Thread: Pointers to physical memory in C?

Pointers to physical memory in C?

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22.03.11 02:37:18 pm

Hi all,

Recently I have decided enough was enough and started re learning some stuff about the C programming language, one of my biggest issues is whether it is possible to point to physical memory in an OS that gives programs virtual memory to work with ( such as Windows ).

Any answers are much appreciated,
DannyDeth.

Re: Pointers to physical memory in C?

Flacko
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22.03.11 06:09:13 pm

I'm sure the library you will have to use will be system-dependant.
I only know about accessing a program's memory using WINAPI. I hate, WINAPI, btw.

Once you get the process handle, you can access it's memory by declaring a void pointer and calling read process memory.
This is how you read CS2D's memory to get the currently connected ip:

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HANDLE cs2d_exe=0;

//I'm assuming you have some code to get the handle to CS2D or atleast it's PID (and then convert it to handle)

unsigned char arr[4]; //Declare an array of chars

memset(arr,0,4); //Fill with 0s

void* ptr = (void*)0x0063297c;//The address we want to read

ReadProcessMemory(cs2d_exe,ptr, arr, 4, 0); //Read 4bytes from the address, store in arr

printf("Connecting to: %i.%i.%i.%i\n",arr[3],arr[2],arr[1],arr[0]); //Output

edited 2×, last 23.03.11 06:43:50 am

Re: Pointers to physical memory in C?

DannyDeth
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23.03.11 12:41:13 pm

Flacko has written

I hate, WINAPI, btw.

So do I and majority of the cross-platform style developers around the world. Infact I was hoping I wouldn't have to use an API's, but I guess I have too.

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Pointers to physical memory in C?