bsd - freebsd compile is so complicated? -


i want add custom syscall freebsd(school work). google hundreds of time. there no right solution it. homework is: "add custom syscall freebsd kernel , recompile kernel , use it". find should follow instructions in these 2 pages:

1 : http://www.onlamp.com/pub/a/bsd/2003/10/09/adding_system_calls.html

then

2: https://www.freebsd.org/doc/en/books/handbook/kernelconfig-building.html

will shows errors in compile time:

<sys/parma.h> no such file or directory <sys/kern.h> no such file or directory <sys/syscallargs.h> no such file or directory

i removed these 3 header include form file recompile it. shows other errors like: maxcpu undeclered in pcpu.h file.

what missed? how can school work?

note: use freebsd8 in vbox

look @ error messages say; files don't exist.

  • the first include file typo; it's param.h, not parma.h!
  • there no kern.h. maybe mean sys/kernel.h?
  • idem syscallargs.h. perhaps mean syscall.h?

you can find header files e.g:

find /usr/src/sys/ -type f -name '*.h'|grep 'sys/.*kern.*\.h' /usr/src/sys/ofed/include/linux/kernel.h /usr/src/sys/dev/netmap/netmap_kern.h ...

update: more important determining includes actually need.

freebsd has pretty documentation. if want use kernel function or data-structure, covered in section 9 of manual pages.

you can list manual pages in section ls /usr/share/man/man9/ | less. or can use apropos command. since want implement syscall, start e.g.

apropos syscall

it return:

syscall_module(9)        - syscall kernel module declaration macro syscall(2), __syscall(2) - indirect system call

it seems me first 1 relevant assignment. (the second 1 how call system call user space.) read man syscall_module. or read online.

note that:

     minimal example syscall module can found in      /usr/share/examples/kld/syscall/module/syscall.c.

that example should enough started on writing own system call module...


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