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Document new hwatch/dhwatch commands.

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bsd 2001-07-13 02:30:52 +00:00
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share/man/man4/ddb.4
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@ -419,6 +419,27 @@ with an error message.
Attempts to watch wired kernel memory
may cause unrecoverable error in some systems such as i386.
Watchpoints on user addresses work best.
.It Xo
.Cm hwatch
.Ar addr Ns Li \&, Ns Ar size
.Xc
Set a hardware watchpoint for a region if supported by the
architecture. Execution stops when an attempt to modify the region
occurs. The
.Ar size
argument defaults to 4.
.Pp
.Sy Warning :
The hardware debug facilities do not have a concept of seperate
address spaces like the watch command does. Use
.Cm hwatch
for setting watchpoints on kernel address locations only, and avoid
its use on user mode address spaces.
.It Xo
.Cm dhwatch
.Ar addr Ns Li \&, Ns Ar size
.Xc
Delete specified hardware watchpoint.
.It Cm gdb
Toggles between remote GDB and DDB mode. In remote GDB mode, another
machine is required that runs