kernel

  1. Alain De Vos

    Building kernel and world in a poudriere jail

    Can I build a kernel and world in a poudriere jail? Is there a kernel and world port ? Or how to do ?
  2. Unee0x

    Kernel Development and Testing

    I'm just starting kernel development ( custom kernels, drivers, patching and etc... ) and i'd like to find a good tutorial of how to setup and environment for FreeBSD Kernel Development. For instance, executing custom code on a live kernel as well as debugging. Will I actually need two machines...
  3. I

    Did you ever consider using a microkernel?

    I read a lot about L4 microkernels recently and I found that seL4 is the only kernel that has a formal verification, which sounds pretty impressive. Somebody already ported OpenBSD to L4 many years ago, so it is not impossible to do it with BSD systems. As far as I understand from security and...
  4. rwatt

    Unable to build generic kernel. All methods generate errors.

    Hello, Still learning the ins and outs of FreeBSD, so please keep that in mind. :-) I'm happy to read whatever manual that might help with this, but my searches have not turned up anything that is helpful. I have a server at home running FreeBSD 12.1-RELEASE-p3 GENERIC amd64. It is mainly just...
  5. J

    calling kernel space malloc get error

    ###Here is the errors I am getting. Below the error is the code I wrote, any help would be incredibly appreciated.!! Thanks! Can someone explained by I am getting implicit warning for malloc and Malloc_Define, I included the header files. I also would like to know how to fix the errors ...
  6. J

    unknown type name intrmask_t when include sys/systm.h

    I am new to freebsd, just imported #include <sys/systm.h> errors Not find uintfptr_t Intrmask_t definitions, Do yall know what else I need to include or change? n file included from main.c:4: /usr/include/sys/systm.h:419:39: error: unknown type name 'uintfptr_t'; did you mean...
  7. M

    What is it with TPM (Trusted Platform Module) preventing resume from suspend-to-RAM?

    Interestingly I have been struck by the same issue that is always only referenced for ThinkPad users, although I don't have a ThinkPad but a Clevo N130WU (which is quite a common laptop known around the world under different brands). I could only get resume from suspend-to-RAM working by first...
  8. vanbreukelingen

    kernel panic on bhyve virtualization

    At the link you can find a fotograph of the kernel crash, it could not even been dumped or a continue; a restart helped, but after 10 minutes the same story. I guess its virbr0-interface when you disable option HYPERV in kernel configuration. to make a long story short: rvc_start < rvc_end...
  9. Bobi B.

    How to specify kernel configuration when compiling out-of-tree kernel modules?

    Or, having an out-of-tree (i.e. not in /usr/src/sys) custom FreeBSD kernel module, how one can specify a kernel configuration, like GENERIC, the module shall be built against? Here is a very small kernel module that can be compiled, but cannot be loaded on a stock FreeBSD 12. Makefile: KMOD=...
  10. M

    FreeBSD 12.0 - module init function is called few times - Raspberry Pi 3.

    Hi, I write a driver of LCD, witch use SPI and GPIO and works on kernelspace. Source code is available on my github: https://github.com/mattpro/freebsd_test2/blob/master/lcd.c I'll try to test spi but I find strength things. When I load module into kernel: kldload ./lcd.ko I see that init...
  11. jontheil

    Solved Some necessary steps missing to install a new kernel

    Some months ago, I had some problems when upgrading to FreeBSD 11.2 https://forums.FreeBSD.org/threads/cannot-make-buildworld-after-failed-upgrade-to-11-2.67177/ After using some of the nice advices, I ended up with a usable system, even though some inconsistencies were obvious. I did wget...
  12. Y

    OSS Sound Quality

    The default settings of oss are insane. These settings are for pure quality without cracking or any other kind of distortion and low-quality annoyance. This is an passthrough, bypassing some features you don't need. This gives you full quality without thinking about it anymore. sysctl.conf...
  13. focaccio

    Unix and Linux - Network Subsystems

    Hi All, I'm a network engineer looking to better understand the network subsystem of FreeBSD (unix systems) and in particular how it differs from the linux kernel network subsystem. Any good links or books? I believe iproute2 (this is a package, not a subsystem, right?) is used by linux, so...
  14. S

    Why is PPS_SYNC disabled in GENERIC kernel?

    Several years into compiling custom kernel to let GPS provide precise time-keeping signals, I still wonder why is that not enabled in stock kernel? With tons of modules for hardware bundled by default, many of which are obsolete, expensive or otherwise rare, it is surprising that such a...
  15. B

    The perennial Xorg inside jails patch

    I've modified the patch I found on these fora to allow /dev/kmem write access inside jails. The security arguments are hopefully well known: there isn't any. It's still useful for me in order to test different Xorg configs, desktop environments, and ports trees without potentially screwing up...
  16. Farhan Khan

    Get thread from within a module

    Hi all, I am doing some light experimentation with the kernel and am writing a module. I am trying to have a /dev file functions as a TCP listening socket. So if you do cat /dev/tcp/5555, it would be the equivalent of nc -l 5555. My general strategy is to create a socket by jumping into the...
  17. decuser

    Kernel exploration via FreeBSD Kernel Internals: An Intensive Code Walkthrough, by McKusick

    I would like to set up a VM to work through the McKusick videos and material. Reading code and talking through it is great, but I really want to be able to tweak bits and see my changes in action. Since the release is available online, I know that I can download pretty much ISO or vm of the...
  18. goshanecr

    amdtemp not shown AMD A6-9500E sensors

    Good day! I have a PC with such processor: CPU: AMD A6-9500E RADEON R5, 6 COMPUTE CORES 2C+4G (2994.44-MHz K8-class CPU) Origin="AuthenticAMD" Id=0x660f51 Family=0x15 Model=0x65 Stepping=1...
  19. C

    Solved Fatal trap 18: integer divide fault while in kernel mode after compile kernel on Freebsd 11.1

    Hi , I facing the problem above after compile the kernel. Each time FreeBSD will loop boot several time until can go to login page. My cpu info hw.model: Intel(R) Core(TM) i3-4160 CPU @ 3.60GHz hw.machine: i386 hw.ncpu: 4 my kernel info added my option from generic one. # # GENERIC --...
  20. R

    C/C++ How can i get the mount_point & absolute_path by the installed file struct?

    I'm writing a simple hook to open / openat. Like this static int openat_hook(struct thread *td, register struct openat_args *uap) { // print uprintf(" SYS_openat: \"%s\", flags: %d, mode: %X fd: %d\n", uap->path, uap->flag, uap->mode, uap->fd); get_whole_addr(td, uap); return...
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