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Anden100
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 Posted: Fri Jun 19, 2009 5:15 pm Post subject: [C] Writing to a double pointer |
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Im attempting to write to a DOUBLE pointer, where i found the address in CheatEngine, and im injecting a .dll into an application.
i try to do this:
| Code: | | *(DOUBLE*)0x00A8F4D4 = 500; |
But it crashes my app (or, i do exceptions, but without those, it would crash...), why is it being so evil?
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Slugsnack
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| Posted: Fri Jun 19, 2009 7:32 pm Post subject: |
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first of all is that address writable ?
secondly.. try declaring something like :
DOUBLE number = 500;
then assigning it then. the reason i ask you to do that is that normal numbers, ints and stuff are stored differently in memory than double/floats. not sure how the compiler handles it when you write that but no harm in giving my idea a go
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&Vage
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| Posted: Fri Jun 19, 2009 8:31 pm Post subject: |
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| Slugsnack wrote: | first of all is that address writable ?
secondly.. try declaring something like :
DOUBLE number = 500;
then assigning it then. the reason i ask you to do that is that normal numbers, ints and stuff are stored differently in memory than double/floats. not sure how the compiler handles it when you write that but no harm in giving my idea a go |
Surely someone who says he's pro at C should know you'll need .f.
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Slugsnack
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| Posted: Fri Jun 19, 2009 8:48 pm Post subject: |
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| surely a faggot fanboy of me, aka you, would know that i program assembly and only started C 2 days ago
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&Vage
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| Posted: Fri Jun 19, 2009 8:50 pm Post subject: |
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| Slugsnack wrote: | | surely a faggot fanboy of me, aka you, would know that i program assembly and only started C 2 days ago |
Rofl, didn't you say you knew more about C++ than me? You were bragging about how good you were on MSN, surely someone with your knowledge should know this, correct? Anyways, you didn't start C 2 days ago. Dll injector in coder section @ GzN. GJ. Hurrrrrrrrrrr.
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smartz993
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| Posted: Fri Jun 19, 2009 9:44 pm Post subject: |
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lmfao, what are you retarded void ?
i'd love to see an example of somebody using an "F" after setting a DOUBLE value ahah
way to have less skill than a kid that's been doing C for 2 days ;[
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&Vage
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| Posted: Fri Jun 19, 2009 10:07 pm Post subject: |
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| smartz993 wrote: | lmfao, what are you retarded void ?
i'd love to see an example of somebody using an "F" after setting a DOUBLE value ahah
way to have less skill than a kid that's been doing C for 2 days ;[ |
What are you lurking now? You're still the same pussy that you always were. You and Megan should go jump in a river and die.
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smartz993
I post too much
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| Posted: Fri Jun 19, 2009 10:19 pm Post subject: |
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ahaha
sluggy let me know about your recent General Programming retard escapades..
also, i'm not so sure i'm lurking..see what i did there ? it's called a post
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&Vage
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| Posted: Fri Jun 19, 2009 11:02 pm Post subject: |
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| smartz993 wrote: | ahaha
sluggy let me know about your recent General Programming retard escapades..
also, i'm not so sure i'm lurking..see what i did there ? it's called a post |
Anymore, key word. Lol Mike calling a pussy for backup, because he can't defend for himself.
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smartz993
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| Posted: Fri Jun 19, 2009 11:06 pm Post subject: |
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| ; wrote: | | smartz993 wrote: | ahaha
sluggy let me know about your recent General Programming retard escapades..
also, i'm not so sure i'm lurking..see what i did there ? it's called a post |
Anymore, key word. Lol Mike calling a pussy for backup, because he can't defend for himself. |
He seemed to be doing a fine job, seen as how you fucked yourself over on the little float/double mishap
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manc
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| Posted: Sat Jun 20, 2009 12:12 am Post subject: |
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Just sayin.
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Anden100
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| Posted: Sat Jun 20, 2009 4:11 am Post subject: |
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Nice picture manc! 
This still gives me an exception:
| Code: | void Function(){
addr = 0x00A8F4D4;
DWORD origProtect;
VirtualProtect((LPVOID)addr, sizeof(DOUBLE), PAGE_READWRITE, &origProtect);
DOUBLE value = 500;
*(DOUBLE*)addr = value;
VirtualProtect((LPVOID)addr, sizeof(DOUBLE), origProtect, &origProtect);
} |
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&Vage
Grandmaster Cheater Supreme
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| Posted: Sat Jun 20, 2009 8:57 am Post subject: |
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| smartz993 wrote: | | ; wrote: | | smartz993 wrote: | ahaha
sluggy let me know about your recent General Programming retard escapades..
also, i'm not so sure i'm lurking..see what i did there ? it's called a post |
Anymore, key word. Lol Mike calling a pussy for backup, because he can't defend for himself. |
He seemed to be doing a fine job, seen as how you fucked yourself over on the little float/double mishap |
Let's ride his dick shall we.
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lurc
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| Posted: Sat Jun 20, 2009 9:22 am Post subject: |
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void why do you always seem to start fights about the most random shit and to say someone doesn't know anything about C coming from your mouth is just fucking stupid.
Anywho back on track here. Did you try to memcpy/__movsb the memory at that VA to a DOUBLE?
Try it. (This is reading btw, switch the src and dest parameters if you want to write.)
| Code: | DOUBLE *theDouble = new DOUBLE;
memcpy((LPVOID)Addy, &theDouble, sizeof(DOUBLE));
..
delete theDouble; |
play around with it and see what happens.
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Last edited by lurc on Sat Jun 20, 2009 11:22 am; edited 1 time in total |
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Anden100
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| Posted: Sat Jun 20, 2009 10:46 am Post subject: |
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I havent done alot work with new and delete, but this gives acces violation aswell...:
| Code: | DWORD origProtect;
VirtualProtect(LPVOID(addr), sizeof(DOUBLE), PAGE_READWRITE, &origProtect);
DOUBLE* theDouble = new DOUBLE;
*theDouble = 500;
memcpy(LPVOID(addr), &theDouble, sizeof(DOUBLE));
VirtualProtect(LPVOID(addr), sizeof(DOUBLE), PAGE_READWRITE, &origProtect);
delete theDouble; |
I can write to the pointer using CheatEngine, but not from within my DLL 
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