On Sun, Nov 07, 2004 at 04:29:42PM -0800, Dan Strick wrote: > Does anyone know where the system calls are really defined?
As others said, syscalls are implemented in /sys. > I followed open() to _open() to __sys_open() which seems > to be part of something called libc_r before I ran into a > blank wall. I grepped all of the regular files in /usr/src > and /usr/include and turned up nothing. I even tried > grepping for open in the output of "nm -g /usr/lib/libc.a". > There is no __sys_open() in libc. Am I dealing with > C-compiler magic? Secret macro instructions invoking > undocumented gnu C-compiler asm() features? A CIA plot? You didn't say the version of FreeBSD you use (I guess that you use 4.x). __sys_open is an entry name for open() syscall and it (and most of other ones) is "constructed" in the /usr/src/lib/libc/i386/SYS.h file for i386, check it. And check /usr/src/lib/libc/sys/Makefile.inc to understand from where names of syscalls are taken and how Assembler sources are created for syscalls. _______________________________________________ [EMAIL PROTECTED] mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-hackers To unsubscribe, send any mail to "[EMAIL PROTECTED]"
