Rick

void
my_SendChat (const void **s1, const bool s2, const char **s3)
{
	// GameType::c2sSendChat(bool global, StringPtr message)
	
	// get the stack pointer
	asm("movl %ebp, o_esp");
	
	// Execute payload
	ChatHandler(s2, s3);
	
	// 1. correct frame pointer
	// 2. push s1 and s2 on stack
	// 3. push old_String + n bytes on stack
	// 4. ret
	
	// prolog of my_SendChat
	asm("sub $0x8,%esp");
	asm("mov 0xffffffe8(%ebp),%ebx");
	asm("leave");
	
    // execute head of original function
    asm("push %ebp");
    asm("mov %esp, %ebp");
    asm("push %ebx");
    asm("sub $0x64, %esp");
    asm("mov 0x0C(%ebp), %eax");
    
    // jmp back to original function
    asm("mov o_SendChat, %eax");
    asm("push %eax");
    asm("ret");
}