I just noticed some strange assembly language code of empty main method.

//filename: main.c
void main()
{

}

disassembly:

push        ebp  
mov         ebp,esp  
sub         esp,0C0h; why on the earth is it reserving 192 bytes?  
push        ebx  
push        esi  
push        edi  ; good compiler. Its saving ebx, esi & edi values.
lea         edi,[ebp-0C0h]  ; line 1
mov         ecx,30h  ; line 2
mov         eax,0CCCCCCCCh  ; line 3
rep stos    dword ptr es:[edi]  ; line 4


xor         eax,eax  ; returning value 0. Code following this line is explanatory.
pop         edi  ; restoring the original states of edi,esi & ebx
pop         esi  
pop         ebx  
mov         esp,ebp  
pop         ebp  
ret
  1. why on the earth is it reserving 192 bytes for function where there aren't any variables
  2. whats up with the four lines: line 1, line 2, line 3, line 4? what is it trying to do & WHY?
c visual-c++ assembly
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