Hi,
I would like to know what should I do to use function names into my programs. I'm able only to use the function syscall(<syscall number>) in my programs.
Thanks
Hi,
System calls do not work that way. The system calls are very much architecture dependent. So, each architecture has its own implementation. so, syscallx is put in asm folder.
In x86, int instruction is used for system call with syscall number in EAX. So, when you call int 0x80(linux syscall number). Processor searches IDT vector in IDTR register. searchs index no 0x80. There it finds entry point for syscall and the selector. so, it jumps to that entry point.
So, you cant simply use mycall() because it is just a call instruction to the address.
similarly in PowerPC you have an sc instruction for system call and syscall number is put in r0.
regards manish
_________________________________________________________________
The new MSN 8: smart spam protection and 2 months FREE* http://join.msn.com/?page=features/junkmail
-- Kernelnewbies: Help each other learn about the Linux kernel. Archive: http://mail.nl.linux.org/kernelnewbies/ FAQ: http://kernelnewbies.org/faq/
