On Mon, Oct 27, 2003 at 09:44:05AM -0800, Teresa Tao wrote: > I have several questions and hope somebody could help me with the answers: > 1. how to use gcc to compile the user mode program with larger stack size? Not at all. Stack size is a resource limit which is set with can be manipulated with setrlimit(2) or in bash with the ulimit command. It defaults to 8MB. For pthread applications the stack size is a thead attribute, seem libc manual. > 2. Inside the user mode program, I have declared some gloabal data which > is being put on the bss section and I would like to know whom initialize > the bss section? .bss is uninitialized. Initialized data can't be in .bss. > How big is the bss section? Under what kind of situation, As big as needed for everything in it. > the bss section data could be corrupted? There's millions of ways of writing broken code. > 3. What's the difference to compile the program with -G 0 option? That > menas I don't use the $gp register, will there be any side effect? -G 0 is the default for userspace. Iow. passing the option changed nothing. Ralf
