Amos Shapira wrote: > Hello, > > Is it possible to dynamically add a system call (e.g. by a kernel module)? Sure it is. Now for the more important questions: 1. Is it easy? 2. Is it worth the hassle? > > Currently my plan is to add a special file under /proc or /dev which > any program will be able to open and then pass the arguments through > ioctl(2). why not do it the way it's meant to be done, using a custom device? That's the straight forward way.
If you really really must put in a new syscall, this is the ugly hack you can do. Note that you may never ever ever unload this hack, no matter what you do. Here goes: Install your own interrupt handler on the syscall interrupt number (memory serve me right, this is 80 on i386 for Linux). Filter out your own syscall number, pick a syscall number that will never be used by anyone in the foreseeable future, and if it's not it, call the original handler. If you want my advice - go with an ioctl and a custom device. It's documented, non-hackish, allows unload and is future proof. > > Thanks, > > --Amos > Shachar ================================================================= To unsubscribe, send mail to [EMAIL PROTECTED] with the word "unsubscribe" in the message body, e.g., run the command echo unsubscribe | mail [EMAIL PROTECTED]
