bool "KGDB: kernel debugger"
depends on HAVE_ARCH_KGDB
depends on DEBUG_KERNEL
If you say Y here, it will be possible to remotely debug the
kernel using gdb. It is recommended but not required, that
you also turn on the kernel config option
CONFIG_FRAME_POINTER to aid in producing more reliable stack
backtraces in the external debugger. Documentation of
kernel debugger is available at http://kgdb.sourceforge.net
as well as in Documentation/dev-tools/kgdb.rst. If
unsure, say N.
tristate "KGDB: use kgdb over the serial console"
depends on TTY && HW_CONSOLE
Share a serial console with kgdb. Sysrq-g must be used
to break in initially.
bool "KGDB: internal test suite"
This is a kgdb I/O module specifically designed to test
kgdb's internal functions. This kgdb I/O module is
intended to for the development of new kgdb stubs
as well as regression testing the kgdb internals.
See the drivers/misc/kgdbts.c for the details about
the tests. The most basic of this I/O module is to boot
a kernel boot arguments "kgdbwait kgdbts=V1F100"
bool "KGDB: Run tests on boot"
depends on KGDB_TESTS
Run the kgdb tests on boot up automatically without the need
to pass in a kernel parameter
string "KGDB: which internal kgdb tests to run"
depends on KGDB_TESTS_ON_BOOT
This is the command string to send the kgdb test suite on
boot. See the drivers/misc/kgdbts.c for detailed
information about other strings you could use beyond the
default of V1F100.
bool "KGDB: Allow debugging with traps in notifiers"
depends on X86 || MIPS
This will add an extra call back to kgdb for the breakpoint
exception handler which will allow kgdb to step through a
bool "KGDB_KDB: include kdb frontend for kgdb"
KDB frontend for kernel
hex "KDB: Select kdb command functions to be enabled by default"
depends on KGDB_KDB
Specifiers which kdb commands are enabled by default. This may
be set to 1 or 0 to enable all commands or disable almost all
Alternatively the following bitmask applies:
0x0002 - allow arbitrary reads from memory and symbol lookup
0x0004 - allow arbitrary writes to memory
0x0008 - allow current register state to be inspected
0x0010 - allow current register state to be modified
0x0020 - allow passive inspection (backtrace, process list, lsmod)
0x0040 - allow flow control management (breakpoint, single step)
0x0080 - enable signalling of processes
0x0100 - allow machine to be rebooted
The config option merely sets the default at boot time. Both
issuing 'echo X > /sys/module/kdb/parameters/cmd_enable' or
setting with kdb.cmd_enable=X kernel command line option will
override the default settings.
bool "KGDB_KDB: keyboard as input device"
depends on VT && KGDB_KDB
KDB can use a PS/2 type keyboard for an input device
int "KDB: continue after catastrophic errors"
depends on KGDB_KDB
This integer controls the behaviour of kdb when the kernel gets a
catastrophic error, i.e. for a panic or oops.
When KDB is active and a catastrophic error occurs, nothing extra
will happen until you type 'go'.
CONFIG_KDB_CONTINUE_CATASTROPHIC == 0 (default). The first time
you type 'go', you will be warned by kdb. The secend time you type
'go', KDB tries to continue. No guarantees that the
kernel is still usable in this situation.
CONFIG_KDB_CONTINUE_CATASTROPHIC == 1. KDB tries to continue.
No guarantees that the kernel is still usable in this situation.
CONFIG_KDB_CONTINUE_CATASTROPHIC == 2. KDB forces a reboot.
If you are not sure, say 0.
endif # KGDB