|
-D |
Causes the kernel debug program to be loaded on each subsequent reboot. |
|
-I |
Causes the kernel debug program to be loaded and invoked on each subsequent
reboot. |
|
-L |
Displays the current settings for the kernel debug program and the
memory overlay detection system. Note that the settings shown will not take
effect until after the next time that the bosboot -a and shutdown -r commands are run. This is the default. |
|
-M |
Causes the memory overlay detection system to be enabled. Memory overlays
in kernel extensions and device drivers will cause a system crash. |
|
-n sizelist |
Has the same effect as the -s option, but works
instead for network memory. Each size must be in the range from 32 to 2048,
and must be a power of 2. This causes the net_malloc_frag_mask variable of
the no command to be turned on during boot. |
|
-o |
Turns off all debugging features of the system. |
|
-s sizelist |
Causes the memory overlay detection system to promote each of the specified
allocation sizes to a full page, and allocate and hide the next subsequent
page after each allocation. This causes references beyond the end of the
allocated memory to cause a system crash. sizelist is a list of memory sizes
separated by commas. Each size must be in the range from 16 to 2048, and
must be a power of 2. |
|
-S |
Causes the memory overlay detection system to promote all allocation
sizes to the next higher multiple of page size (4096), but does not hide subsequent
pages. This improves the chances that references to freed memory will result
in a crash, but it does not detect reads or writes beyond the end of allocated
memory until that memory is freed. |
|
-l <file< |
Loads a symbol file into kernel for the kdb debugger
print facility. Loads the symbols immediately. Do not reboot. A symbol file
to print LFS stuctures may be created as follows:
# echo '#include <sys/vnode.h>' < sym.c
# echo 'main() { ; }' << sym.c
# cc -g -o sym sym.c -qdbxextra /* for 32 bit kernel */
# cc -g -q64 -o sym sym.c -qdbxextra /* for 64 bit kernel */
|
|
-f |
Flushes all the symbols (loaded through -l option)
from kernel memory. Flushed immediately. Does not require a reboot. |