mov eax, [iat___2_YAPAXI_Z]
mov [iat_gluOrtho2D+4], eax
mov [iat___2_YAPAXI_Z], hooked_new
jmp 0xa4f5e9

hooked_new:
push [esp+4]
call [iat_gluOrtho2D+4]
add esp, 4
push [esp+4]
push 0x33
push eax
call [iat_memset]
add esp, 12
ret

// then patch entrypoint: call foo; jmp a4f5e9 -> call foo; jmp hooked_ep
// also patch PE header to have .rdata writeable ('40 00 00 40 . d a t a' -> '40 00 00 c0 . d a t a')