kmdb(7d) Devices kmdb(7d)NAME
kmdb - Kernel debugger
DESCRIPTION
The kmdb driver is the mechanism used by mdb to invoke and control kmdb. This is not a public interface.
FILES
/dev/kmdb
Kernel debugger driver.
ATTRIBUTES
See attributes(5) for descriptions of the following attributes:
+-----------------------------+-----------------------------+
| ATTRIBUTE TYPE | ATTRIBUTE VALUE |
+-----------------------------+-----------------------------+
|Interface Stability |Private |
+-----------------------------+-----------------------------+
SEE ALSO attributes(5)SunOS 5.10 8 May 2004 kmdb(7d)
Check Out this Related Man Page
kadb(1M) System Administration Commands kadb(1M)NAME
kadb - a kernel debugger
SYNOPSIS
SPARC
ok boot device_specifier kadb [-d] [boot-flags]
x86
select (b)oot or (i)nterpreter: b kadb [-d] [boot-flags]
DESCRIPTION
kadb, an interactive kernel debugger, has been replaced by kmdb(1). For backwards compatibility, the methods used to load kadb will be
interpreted as requests to load kmdb(1). Unlike with the compatibility link from adb(1) to mdb(1), kmdb(1) will always load in its native
user interface mode, regardless of the name used to load it.
kmdb(1) is based on mdb(1), and thus shares mdb's user interface style and feature set. The mdb(1) man page describes the features and
operation of mdb. The kmdb(1) man page describes the differences between mdb and kmdb. This man page describes the major changes and incom-
patibilities between kadb and kmdb.
Consult the Solaris Modular Debugger Guide for a detailed description of both mdb and kmdb.
Major changes
This section briefly lists the major differences between kadb and kmdb. It is not intended to be exhaustive.
Debugger Loading and Unloading
kmdb(1) may be loaded at boot, as with kadb. It may also be loaded after boot, thus allowing for kernel debugging and execution control
without requiring a system reboot. If kmdb(1) is loaded after boot, it may be unloaded.
mdb Feature Set
The features introduced by mdb(1), including access to kernel type data, debugger commands (dcmds), debugger modules (dmods), and
enhanced execution control facilities, are available under kmdb(1). Support for changing the representative CPU (:x) is available for
both SPARC and x86. Furthermore, full execution-control facilities are available after the representative CPU has been changed.
Significant Incompatibilities
This section lists the significant features that have changed incompatibly between kadb and kmdb(1). It is not intended to be exhaustive.
All kmdb(1) commands referenced here are fully described in the kmdb(1) man page. A description as well as examples can be found in the
Solaris Modular Debugger Guide.
Deferred Breakpoints
The kadb-style "module#symbol:b" syntax is not supported under kmdb(1). Instead, use "::bp module`symbol".
Watchpoints
The ::wp dcmd is the preferred way to set watchpoint with kmdb. Various options are available to control the type of watchpoint set,
including -p for physical watchpoints (SPARC only), and -i for I/O port watchpoints (x86 only). $l is not supported, therefore, the
watchpoint size must be specified for each watchpoint created.
Access to I/O Ports (x86 only)
The commands used to access I/O ports under kadb have been replaced with the ::in and ::out dcmds. These two dcmds allow both read and
write of all I/O port sizes supported by kadb.
ATTRIBUTES
See attributes(5) for descriptions of the following attributes:
+-----------------------------+-----------------------------+
| ATTRIBUTE TYPE | ATTRIBUTE VALUE |
+-----------------------------+-----------------------------+
|Availability |SUNWcar |
+-----------------------------+-----------------------------+
SEE ALSO adb(1), mdb(1), kmdb(1), attributes(5)
Solaris Modular Debugger Guide
SunOS 5.10 2 Jul 2004 kadb(1M)