Hi Rajaram, Please read an excellent book "Linux Kernel Development by Robert Love " for 2.6 kernel. The chapters on System call and process would solve all your doubts. The book is written in extremely simple language! Regards, Surbhi Chitre. On 11/18/05, Nilesh Agrawal <nilesh.agrawal@xxxxxxxxx> wrote: > On 11/18/05, Rajaram Surya <rajaram_irtt3@xxxxxxxxxxx> wrote: > > Hi, > > > > Do every system call have a wrapper, which runs in user space and copies > > the system call number in the register and then switches the CPU mode to > > kernel mode ? Please explain. > > Yes. The wrapper copies the system call number and agruments in the > registers and then executes int 0x80 > > > Also when is the kernel stack for a process created ? Is it when the > > process is created or when the process comes to the kernel mode on > > invoking a system call ? > > space allocated when process created. > infact 4KB is shared between process control block and the stack > > -- > Kernelnewbies: Help each other learn about the Linux kernel. > Archive: http://mail.nl.linux.org/kernelnewbies/ > FAQ: http://kernelnewbies.org/faq/ > > -- Kernelnewbies: Help each other learn about the Linux kernel. Archive: http://mail.nl.linux.org/kernelnewbies/ FAQ: http://kernelnewbies.org/faq/
