Ollydbg & #define functions

[qet123]

Well, i looked for older sources for gunz, and i found out that in 2007 they didn't defined "ZGetGame" and "ZGetGameClient" ... like they did in 1.5, in 1.5 they define it in ZGlobal.h which that makes me impossible to find the adress, my question is, does it really impossible to find the "Address" if it's defined as #define?

[MentaL]

[ngskRabbit]

In short, possible. #define just makes the function to "strong" inline.

In long...
#define is interpreted by a preprocessor (not a compiler), this replaces all of reference to #define's code.

Example,

#define SOME_MACRO  16
...
int n[SOME_MACRO];
memset(n, 0, SOME_MACRO * sizeof(int));
for(int i = 0; i < SOME_MACRO; i++)
...

while compiling, this will be...

...
int n[16];
memset(n, 0, 16 * sizeof(int));
for(int i = 0; i < 16; i++)
...

Imagined ASM...

...
SUB ESP,16 * sizeof(int)
PUSH 16 * sizeof(int)
PUSH 0
LEA EAX,[ESP+8]
PUSH EAX
CALL memset
ADD ESP,12
PUSH EBX
XOR EBX,EBX
Addr1 :
...
INC EBX
CMP EBX,16
JL Addr1
POP EBX
...
ADD ESP,16 * sizeof(int)

hmm...

void MyOutput(const char *pszMsg)
{
  ZChatOutput(MCOLOR(255,0,0), pszMsg, ZChat::CL_CURRENT);
}

...
  MyOutput("1st.");
  MyOutput("2nd.");
  MyOutput("3rd.");
...

MyOutput  :
PUSH EBP
MOV EBP,ESP
PUSH ESI
MOV ESI,[EBP-12]
PUSH ZChat::CL_CURRENT
PUSH ESI
PUSH MCOLOR(255,0,0)
CALL ZChatOutput
ADD ESP,sizeof(MCOLOR) + 8
POP ESI
POP EBP
RETN

...
PUSH "1st"
CALL MyOutput
PUSH "2nd"
CALL MyOutput
PUSH "3rd"
CALL MyOutput
ADD ESP,12
...

-------------------------

#define MyOutput(pszMsg)	\
  ZChatOutput(MCOLOR(255,0,0), pszMsg, ZChat::CL_CURRENT)
  
...
  MyOutput("1st.");
  MyOutput("2nd.");
  MyOutput("3rd.");
...

...
PUSH ZChat::CL_CURRENT
PUSH "1st"
PUSH MCOLOR(255,0,0)
CALL ZChatOutput
ADD ESP,sizeof(MCOLOR) + 8
PUSH ZChat::CL_CURRENT
PUSH "2nd"
PUSH MCOLOR(255,0,0)
CALL ZChatOutput
ADD ESP,sizeof(MCOLOR) + 8
PUSH ZChat::CL_CURRENT
PUSH "3rd"
PUSH MCOLOR(255,0,0)
CALL ZChatOutput
ADD ESP,sizeof(MCOLOR) + 8
...

NOTE :Wrote in decimal, Also for ASM part I don't have confidence.