Re: Kernel calls, are they documented somewhere?

Michael Bacarella [EMAIL PROTECTED] writes: gcc does not generate code that can make FreeBSD system calls directly. Most system calls as we know them by the manual have corresponding wrappers in libc. See /usr/src/lib/libc if you have the source installed. Wrong. The threaded C library

Re: Kernel calls, are they documented somewhere?

On Thu, Nov 02, 2000 at 12:12:02AM -0500, Michael Bacarella wrote: This isn't such a daunting task with grep. Source code cross referencers can also help, but I don't use them nearly as often as I thought I would. Thanks for the grep suggestion. I think I found the source code for open() now

Re: Kernel calls, are they documented somewhere?

G. Adam Stanislav wrote: On Thu, Nov 02, 2000 at 12:12:02AM -0500, Michael Bacarella wrote: gcc does not generate code that can make FreeBSD system calls directly. Most system calls as we know them by the manual have corresponding wrappers in libc. See /usr/src/lib/libc if you have the

Re: Kernel calls, are they documented somewhere?

On Thu, 2 Nov 2000, G. Adam Stanislav wrote: I do have the source code, and I have studied it, but it is uncommented. And, it seems, not all of it is included. For example, there is a /usr/src/lib/libc/sys/open.2 but no corresponding open.c. I have been unable to find the source code for

Re: Kernel calls, are they documented somewhere?

On Thu, Nov 02, 2000 at 09:59:02AM +0100, Dag-Erling Smorgrav wrote: Adam, it's really quite simple: if the carry flag is set, the syscall failed, and the value returned is the errno (in your example, open(2) returned 2, which is ENOENT, i.e. the file didn't exist). If it succeeded, the value

Kernel calls, are they documented somewhere?

Are the system calls made via interrupt 0x80 documented somewhere? Whatever section 2 of man says does not work when making direct kernel calls. It only describes how the C library calls work. For example, open() returns -1 if the file is not open. But int 80h made in assembly language with EAX

Re: Kernel calls, are they documented somewhere?

On Thu, Nov 02, 2000 at 12:12:02AM -0500, Michael Bacarella wrote: gcc does not generate code that can make FreeBSD system calls directly. Most system calls as we know them by the manual have corresponding wrappers in libc. See /usr/src/lib/libc if you have the source installed. I do have the