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efjay
Newbie cheater
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Joined: 17 Apr 2014
Posts: 12
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 Posted: Fri Sep 25, 2015 9:11 am Post subject: calling a function in lua engine |
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Hi. If I want to call, say ws2_32.send from my lua script, do I have to use auto assembly?
I am quite noob at ASM.. still learning, but do I do something like this inside lua
| Code: |
autoAssemble(
"globalalloc(RegSend, 1024)\n" ..
"RegSend:\n" ..
"push 0\n" ..
"push 10\n" ..
"push FFFFFFFFFF\n" ..
"push " .. tostring( sendSocket ) .. "\n" ..
"call ws2_32.send" ..
"ret\n"
);
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Then to run it
| Code: |
autoAssemble( "CreateThread(RegSend)\n" );
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?
Thanks for input.
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Redouane
Master Cheater
![]() Reputation: 3
Joined: 05 Sep 2013
Posts: 363
Location: Algeria
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| Posted: Fri Sep 25, 2015 9:32 am Post subject: Re: calling a function in lua engine |
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| efjay wrote: | Hi. If I want to call, say ws2_32.send from my lua script, do I have to use auto assembly?
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| Code: | autoAssemble(string.format([[
globalalloc(RegSend, 1024)
RegSend:
push 0
push 10
push FFFFFFFFFF
push %s
call ws2_32.send
ret
registersymbol(RegSend)]],tostring( sendSocket ))
); |
To call:
| Code: | | createthread(RegSend) |
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efjay
Newbie cheater
![]() Reputation: 0
Joined: 17 Apr 2014
Posts: 12
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| Posted: Fri Sep 25, 2015 10:28 am Post subject: Re: calling a function in lua engine |
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| Redouane wrote: | | efjay wrote: | Hi. If I want to call, say ws2_32.send from my lua script, do I have to use auto assembly?
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| Code: | autoAssemble(string.format([[
globalalloc(RegSend, 1024)
RegSend:
push 0
push 10
push FFFFFFFFFF
push %s
call ws2_32.send
ret
registersymbol(RegSend)]],tostring( sendSocket ))
); |
To call:
| Code: | | createthread(RegSend) |
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Alright, so that's quite similar to what I had, good!
So the MSDN says
int send(
_In_ SOCKET s,
_In_ const char *buf,
_In_ int len,
_In_ int flags
);
is it proper how i have flags first, then length, then buffer? or should it be the other order for pushing?
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Redouane
Master Cheater
![]() Reputation: 3
Joined: 05 Sep 2013
Posts: 363
Location: Algeria
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| Posted: Fri Sep 25, 2015 3:46 pm Post subject: Re: calling a function in lua engine |
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| efjay wrote: | | Redouane wrote: | | efjay wrote: | Hi. If I want to call, say ws2_32.send from my lua script, do I have to use auto assembly?
|
| Code: | autoAssemble(string.format([[
globalalloc(RegSend, 1024)
RegSend:
push 0
push 10
push FFFFFFFFFF
push %s
call ws2_32.send
ret
registersymbol(RegSend)]],tostring( sendSocket ))
); |
To call:
| Code: | | createthread(RegSend) |
|
Alright, so that's quite similar to what I had, good!
So the MSDN says
int send(
_In_ SOCKET s,
_In_ const char *buf,
_In_ int len,
_In_ int flags
);
is it proper how i have flags first, then length, then buffer? or should it be the other order for pushing? |
I think that you are doing it right,you push the arguments in the reverse order,
| Code: | | f(int a,int b,int c) |
becomes
| Code: | push c
push b
push a
call address_where_f_begins |
in the call (before any stackframe),[esp+4] should contain the first arg (a),[esp+8] -> b,and [esp+0c] -> c
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