wiki:Dev/KernelHack

Version 18 (modified by mitty, 12 years ago) (diff)

--

  1. tools
    1. how to build
    2. how to enhancement kernel
  2. debugging Linux Kernel with VMware Workstation
    1. x86
    2. x64

tools

  • ​4.3.5. Tracking Most Frequently Used System Calls
  • ​Kernel/CrashdumpRecipe - Ubuntu Wiki

    LKCD is a project that tries to enable enterprise style post-mortem crash analysis in Linux operating systems. It uses a special mode of kexec which allows to automatically boot a secondary kernel whenever a crash (Oops/panic) occurs. This secondary kernel will then save the state and memory of the primary kernel to a certain location of the filesystem (/var/crash on newer releases). This file can then be used by crash to gather detailed information about the problem.

how to build

how to enhancement kernel

debugging Linux Kernel with VMware Workstation

  • ​http://wiki.osdev.org/VMWare
    • Guest debugging
      • These options are valid in Workstation 6.0+, and should be set in the virtual machine's .vmx file. 
        debugStub.listen.guest32 = "TRUE"
debugStub.listen.guest64 = "TRUE"
      • If using these options, Workstation prints a message "VMware Workstation is listening for debug connection on port 8832." into the vmware.log file. Start a GDB session (using a copy of your kernel that includes debug information), then: 
        target remote localhost:8832
      • Standard gdb commands work in this mode (e.g. printing memory, backtrace). Note that this is a debug stub attached to the KERNEL, not a userspace program.
      • Other useful options: 
        debugStub.listen.guest32.remote = "TRUE" # Allows debugging from a different computer / VM instead of localhost. # The IP for remote debugging will be that of the host.
debugStub.listen.guest64.remote = "TRUE" # Same, but for 64-bit code
monitor.debugOnStartGuest32 = "TRUE" # Breaks into debug stub on first instruction (warning: in BIOS!) # This will halt the VM at the very first instruction at 0xFFFF0, you could set the next breakpoint to break *0x7c00 to break when the bootloader is loaded by the BIOS
debugStub.hideBreakpoints = "TRUE" # Allows gdb breakpoints to work
bios.bootDelay = "3000" # Delay booting the BIOS code.
  • windellはVistaとのデュアルブートなため、UTCではなくlocal timeでRTCが設定されている
    • Ubuntu インストール時に、UTCにすると時計が9時間進む

x86

x64

  • viola0[1-6]でビルドする場合、そのままではx86_64のカーネルが作られるので注意