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azfk
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Joined: 26 May 2009
Posts: 37
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 Posted: Fri Jul 31, 2009 12:42 pm Post subject: Inline Assembly/ |
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| Code: |
__declspec(naked) void SendInputM(UINT nInputs, LPINPUT pInputs, int cbSize)
{
asm(
"pushl %ebp;"
"movl %ebp, %esp;"
"jmp DWORD PTR [myAddress];"
);
}
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How do I place a jump in at&t syntax, searched for a long time... compiler keeps telling me that PTR is junk lolz.
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dnsi0
I post too much
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Posts: 2674
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| Posted: Fri Jul 31, 2009 12:54 pm Post subject: Re: Inline Assembly/ |
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| azfk wrote: | | Code: |
__declspec(naked) void SendInputM(UINT nInputs, LPINPUT pInputs, int cbSize)
{
asm(
"pushl %ebp;"
"movl %ebp, %esp;"
"jmp DWORD PTR [myAddress];"
);
}
|
How do I place a jump in at&t syntax, searched for a long time... compiler keeps telling me that PTR is junk lolz. |
__declspec(naked) void SendInputM(UINT nInputs, LPINPUT pInputs, int cbSize)
{
__asm{
push ebp
mov ebp,esp
jmp DWORD PTR [myAddress]
}
}
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azfk
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Joined: 26 May 2009
Posts: 37
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| Posted: Fri Jul 31, 2009 1:05 pm Post subject: |
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| GCC compiler = at&t
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Cheat Engine User
Something epic
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Posts: 2071
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| Posted: Fri Jul 31, 2009 1:20 pm Post subject: |
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| jmpl myAddress(,1)
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azfk
Cheater
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Joined: 26 May 2009
Posts: 37
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| Posted: Fri Jul 31, 2009 1:49 pm Post subject: |
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HOHO GREAT
that works but.. now i'm getting some dumb error
| Code: |
DWORD myAddress = NULL;
__declspec(naked) void SendInputM(UINT nInputs, LPINPUT pInputs, int cbSize)
{
asm(
"pushl %ebp;"
"movl %esp, %ebp;"
"jmpl myAddress(,1);"
);
}
int main(void)
{
int length, repeats, c, a, dwMilliseconds;
CHAR string_input [1024];
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Says 'undefined reference to myaddress' but i thought i made it global O.O
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HomerSexual
Grandmaster Cheater Supreme
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Joined: 03 Feb 2007
Posts: 1657
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| Posted: Fri Jul 31, 2009 5:19 pm Post subject: |
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why is MyAddress NULL.
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azfk
Cheater
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Joined: 26 May 2009
Posts: 37
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| Posted: Fri Jul 31, 2009 5:57 pm Post subject: |
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I thought i had to initialize it as NULL
| Code: |
#define _WIN32_WINNT 0x0501
#include <windows.h>
#include <string.h>
DWORD myAddress;
__declspec(naked) void SendInputM(UINT nInputs, LPINPUT pInputs, int cbSize)
{
asm(
"pushl %ebp;"
"movl %esp, %ebp;"
"jmpl myAddress(,1);"
);
}
int main(void)
{
int length, repeats, c, a, dwMilliseconds;
myAddress = (DWORD)GetProcAddress(LoadLibrary("user32.dll"),"SendInput")+5;
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taking stabs here
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HomerSexual
Grandmaster Cheater Supreme
Reputation: 5
Joined: 03 Feb 2007
Posts: 1657
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| Posted: Fri Jul 31, 2009 7:25 pm Post subject: |
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| azfk wrote: | I thought i had to initialize it as NULL
| Code: |
#define _WIN32_WINNT 0x0501
#include <windows.h>
#include <string.h>
DWORD myAddress;
__declspec(naked) void SendInputM(UINT nInputs, LPINPUT pInputs, int cbSize)
{
asm(
"pushl %ebp;"
"movl %esp, %ebp;"
"jmpl myAddress(,1);"
);
}
int main(void)
{
int length, repeats, c, a, dwMilliseconds;
myAddress = (DWORD)GetProcAddress(LoadLibrary("user32.dll"),"SendInput")+5;
|
taking stabs here |
does that still not work? And you didn't even show initializing myAddress to something other than NULL in the other example
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Anden100
Grandmaster Cheater
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Posts: 668
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| Posted: Sat Aug 01, 2009 1:26 pm Post subject: |
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| Code: | mov eax,myAddress
jmp eax |
or
| Code: | mov eax,[myAddress]
jmp eax |
Not sure
oib111 posted this, might be a help aswell:
| Code: | DWORD myDIP = (DWORD)GetProcAddress(LoadLibrary("d3d9.dll"), "DrawIndexedPrimitive")+5;
_declspec(naked) HRESULT DIP(D3DPRIMITIVETYPE Type, INT BaseVertexIndex, UINT MinIndex, UINT NumVertices, UINT StartIndex, UINT PrimitiveCount) {
_asm {
push ebp
mov ebp, esp
jmp dword ptr ds:[myDIP];
}
} |
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BanMe
Master Cheater
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Joined: 29 Nov 2005
Posts: 375
Location: Farmington NH, USA
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| Posted: Sat Aug 01, 2009 7:45 pm Post subject: |
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bad code.. globals..use all the code in separated functions..
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azfk
Cheater
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Joined: 26 May 2009
Posts: 37
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| Posted: Sat Aug 01, 2009 8:55 pm Post subject: |
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umm this code is determined at runtime (the address), not at compile, and I did put this code outside like this
| Code: |
#include <windows.h>
#include <string.h>
DWORD myAddress = (DWORD)GetProcAddress(LoadLibrary("user32.dll"),"SendInput")+5;
__declspec(naked) void SendInputM(UINT nInputs, LPINPUT pInputs, int cbSize)
{
asm(
"pushl %ebp;"
"movl %esp, %ebp;"
"jmpl myAddress(,1);"
);
}
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but i recently noticed that, I thought I would put it inside the main function, I know some compilers allow this, I'll just switch compilers I guess.
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BanMe
Master Cheater
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Joined: 29 Nov 2005
Posts: 375
Location: Farmington NH, USA
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| Posted: Sat Aug 01, 2009 9:55 pm Post subject: |
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cant do that..unless you make the strings for it in the code..so that when the hook is written to the target code it doesnt rely on 'data that isnt there'...so you can't just force inline the GetProcAddress function like your thinking...you could use a heap by allocating it dynamicily in the hook routine using RtlProcessHeap..and RtlAllocateHeap you could then use the heap to store your strings or other parameters or w/e..or you could make your dll always load at a certain location and use hardcode offsets..
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don't +rep me..i do not wish to have "status" or "recognition" from you or anyone.. thank you. |
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