I wrote a function which modifies esp register through some asm instructions (it pushes things to the stack). Everything works perfect for now because the function takes care of restauring the content of esp issuing an add instruction too so that it can return allright. But reading GCC docs I found this: "If you refer to a particular hardware register from the assembler code, you will probably have to list the register after the third colon to tell the compiler the register's value is modified." Ok, so I do that. But looking at the assembler code generated by the compiler I notice that it is exactly the same than before I did what the docs say. So I wonder, why does the compiler needs to know if I execute an instruction that modifies some register? And also (maybe the answer to the former would respond this) why does the code doesn't change? Thanks a lot, FaQ
