cvs commit: src/test/debug kwrite.c

Tue Jan 10 03:28:34 PST 2006

David Xu wrote:
Simon Schubert wrote:

corecode    2006/01/09 07:05:45 PST

DragonFly src repository

  Added files:
    test/debug           kwrite.c   Log:
  Add kwrite, a tool to inspect and write kernel memory
Cool. :-)
yea, useful to correct refcounts or stuff :)

to find out the address to write to, do something like this

# gdb -k /kernel /dev/mem
. ..
(kgdb) p kernelvar
$1 = 5
(kgdb) set kernelvar = 6
can not access 0xc0340b00, kvm_write: Bad file descriptor
can not access 0xc0340b00, kvm_write: Bad file descriptor
Error accessing memory address 0xc0340b00: Bad file descriptor.
(kgdb) ^Z
# kwrite 0xc0340b00/4
0xc0340b00 05
0xc0340b01 00
0xc0340b02 00
0xc0340b03 00
# kwrite 0xc0340b00 6
0xc0340b00 05 -> 06
Maybe somebody wants to add kvm_nlist() support...

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