[mirror_ubuntu-bionic-kernel.git] / arch / mn10300 / Kconfig.debug

# SPDX-License-Identifier: GPL-2.0
menu "Kernel hacking"

source "lib/Kconfig.debug"

config DEBUG_DECOMPRESS_KERNEL
	bool "Using serial port during decompressing kernel"
	depends on DEBUG_KERNEL
	default n
	help
	  If you say Y here you will confirm the start and the end of
	  decompressing Linux seeing "Uncompressing Linux... " and
	  "Ok, booting the kernel.\n" on console.

config TEST_MISALIGNMENT_HANDLER
	bool "Run tests on the misalignment handler"
	depends on DEBUG_KERNEL
	default n
	help
	  If you say Y here the kernel will execute a list of misaligned memory
	  accesses to make sure the misalignment handler deals them with
	  correctly.  If it does not, the kernel will throw a BUG.

config KPROBES
	bool "Kprobes"
	depends on DEBUG_KERNEL
	help
	  Kprobes allows you to trap at almost any kernel address and
	  execute a callback function.  register_kprobe() establishes
	  a probepoint and specifies the callback.  Kprobes is useful
	  for kernel debugging, non-intrusive instrumentation and testing.
	  If in doubt, say "N".

config GDBSTUB
	bool "Remote GDB kernel debugging"
	depends on DEBUG_KERNEL && DEPRECATED
	select DEBUG_INFO
	select FRAME_POINTER
	help
	  If you say Y here, it will be possible to remotely debug the kernel
	  using gdb. This enlarges your kernel ELF image disk size by several
	  megabytes and requires a machine with more than 16 MB, better 32 MB
	  RAM to avoid excessive linking time. This is only useful for kernel
	  hackers. If unsure, say N.

	  This is deprecated in favour of KGDB and will be removed in a later
	  version.

config GDBSTUB_IMMEDIATE
	bool "Break into GDB stub immediately"
	depends on GDBSTUB
	help
	  If you say Y here, GDB stub will break into the program as soon as
	  possible, leaving the program counter at the beginning of
	  start_kernel() in init/main.c.

config GDBSTUB_ALLOW_SINGLE_STEP
	bool "Allow software single-stepping in GDB stub"
	depends on GDBSTUB && !SMP && !PREEMPT
	help
	  Allow GDB stub to perform software single-stepping through the
	  kernel.  This doesn't work very well on SMP or preemptible kernels as
	  it uses temporary breakpoints to emulate single-stepping.

config GDB_CONSOLE
	bool "Console output to GDB"
	depends on GDBSTUB
	help
	  If you are using GDB for remote debugging over a serial port and
	  would like kernel messages to be formatted into GDB $O packets so
	  that GDB prints them as program output, say 'Y'.

config GDBSTUB_DEBUGGING
	bool "Debug GDB stub by messages to serial port"
	depends on GDBSTUB
	help
	  This causes debugging messages to be displayed at various points
	  during execution of the GDB stub routines. Such messages will be
	  displayed on ttyS0 if that isn't the GDB stub's port, or ttySM0
	  otherwise.

config GDBSTUB_DEBUG_ENTRY
	bool "Debug GDB stub entry"
	depends on GDBSTUB_DEBUGGING
	help
	  This option causes information to be displayed about entry to or exit
	  from the main GDB stub routine.

config GDBSTUB_DEBUG_PROTOCOL
	bool "Debug GDB stub protocol"
	depends on GDBSTUB_DEBUGGING
	help
	  This option causes information to be displayed about the GDB remote
	  protocol messages generated exchanged with GDB.

config GDBSTUB_DEBUG_IO
	bool "Debug GDB stub I/O"
	depends on GDBSTUB_DEBUGGING
	help
	  This option causes information to be displayed about GDB stub's
	  low-level I/O.

config GDBSTUB_DEBUG_BREAKPOINT
	bool "Debug GDB stub breakpoint management"
	depends on GDBSTUB_DEBUGGING
	help
	  This option causes information to be displayed about GDB stub's
	  breakpoint management.

choice
	prompt "GDB stub port"
	default GDBSTUB_ON_TTYSM0
	depends on GDBSTUB
	help
	  Select the serial port used for GDB-stub.

config GDBSTUB_ON_TTYSM0
	bool "/dev/ttySM0 [SIF0]"
	depends on MN10300_TTYSM0
	select GDBSTUB_ON_TTYSMx

config GDBSTUB_ON_TTYSM1
	bool "/dev/ttySM1 [SIF1]"
	depends on MN10300_TTYSM1
	select GDBSTUB_ON_TTYSMx

config GDBSTUB_ON_TTYSM2
	bool "/dev/ttySM2 [SIF2]"
	depends on MN10300_TTYSM2
	select GDBSTUB_ON_TTYSMx

config GDBSTUB_ON_TTYS0
	bool "/dev/ttyS0"
	select GDBSTUB_ON_TTYSx

config GDBSTUB_ON_TTYS1
	bool "/dev/ttyS1"
	select GDBSTUB_ON_TTYSx

endchoice

config GDBSTUB_ON_TTYSMx
	bool
	depends on GDBSTUB_ON_TTYSM0 || GDBSTUB_ON_TTYSM1 || GDBSTUB_ON_TTYSM2
	default y

config GDBSTUB_ON_TTYSx
	bool
	depends on GDBSTUB_ON_TTYS0 || GDBSTUB_ON_TTYS1
	default y

endmenu

config KERNEL_DEBUGGER
	def_bool y
	depends on GDBSTUB || KGDB
Commit	Line	Data
b2441318	1	# SPDX-License-Identifier: GPL-2.0
b920de1b DH	2	menu "Kernel hacking"
	3
	4	source "lib/Kconfig.debug"
	5
b920de1b DH	6	config DEBUG_DECOMPRESS_KERNEL
	7	bool "Using serial port during decompressing kernel"
	8	depends on DEBUG_KERNEL
	9	default n
	10	help
	11	If you say Y here you will confirm the start and the end of
	12	decompressing Linux seeing "Uncompressing Linux... " and
	13	"Ok, booting the kernel.\n" on console.
	14
9f555889 DH	15	config TEST_MISALIGNMENT_HANDLER
	16	bool "Run tests on the misalignment handler"
	17	depends on DEBUG_KERNEL
	18	default n
	19	help
	20	If you say Y here the kernel will execute a list of misaligned memory
	21	accesses to make sure the misalignment handler deals them with
	22	correctly. If it does not, the kernel will throw a BUG.
	23
b920de1b DH	24	config KPROBES
	25	bool "Kprobes"
	26	depends on DEBUG_KERNEL
	27	help
	28	Kprobes allows you to trap at almost any kernel address and
	29	execute a callback function. register_kprobe() establishes
	30	a probepoint and specifies the callback. Kprobes is useful
	31	for kernel debugging, non-intrusive instrumentation and testing.
	32	If in doubt, say "N".
	33
	34	config GDBSTUB
	35	bool "Remote GDB kernel debugging"
1a8d59e5	36	depends on DEBUG_KERNEL && DEPRECATED
b920de1b DH	37	select DEBUG_INFO
	38	select FRAME_POINTER
	39	help
	40	If you say Y here, it will be possible to remotely debug the kernel
	41	using gdb. This enlarges your kernel ELF image disk size by several
	42	megabytes and requires a machine with more than 16 MB, better 32 MB
	43	RAM to avoid excessive linking time. This is only useful for kernel
	44	hackers. If unsure, say N.
	45
1a8d59e5 DH	46	This is deprecated in favour of KGDB and will be removed in a later
	47	version.
	48
b920de1b DH	49	config GDBSTUB_IMMEDIATE
	50	bool "Break into GDB stub immediately"
	51	depends on GDBSTUB
	52	help
	53	If you say Y here, GDB stub will break into the program as soon as
	54	possible, leaving the program counter at the beginning of
	55	start_kernel() in init/main.c.
	56
9ee21723 DH	57	config GDBSTUB_ALLOW_SINGLE_STEP
	58	bool "Allow software single-stepping in GDB stub"
	59	depends on GDBSTUB && !SMP && !PREEMPT
	60	help
	61	Allow GDB stub to perform software single-stepping through the
	62	kernel. This doesn't work very well on SMP or preemptible kernels as
	63	it uses temporary breakpoints to emulate single-stepping.
	64
b920de1b DH	65	config GDB_CONSOLE
	66	bool "Console output to GDB"
	67	depends on GDBSTUB
	68	help
	69	If you are using GDB for remote debugging over a serial port and
	70	would like kernel messages to be formatted into GDB $O packets so
	71	that GDB prints them as program output, say 'Y'.
	72
	73	config GDBSTUB_DEBUGGING
	74	bool "Debug GDB stub by messages to serial port"
	75	depends on GDBSTUB
	76	help
	77	This causes debugging messages to be displayed at various points
	78	during execution of the GDB stub routines. Such messages will be
	79	displayed on ttyS0 if that isn't the GDB stub's port, or ttySM0
	80	otherwise.
	81
	82	config GDBSTUB_DEBUG_ENTRY
	83	bool "Debug GDB stub entry"
	84	depends on GDBSTUB_DEBUGGING
	85	help
	86	This option causes information to be displayed about entry to or exit
	87	from the main GDB stub routine.
	88
	89	config GDBSTUB_DEBUG_PROTOCOL
	90	bool "Debug GDB stub protocol"
	91	depends on GDBSTUB_DEBUGGING
	92	help
	93	This option causes information to be displayed about the GDB remote
	94	protocol messages generated exchanged with GDB.
	95
	96	config GDBSTUB_DEBUG_IO
	97	bool "Debug GDB stub I/O"
	98	depends on GDBSTUB_DEBUGGING
	99	help
	100	This option causes information to be displayed about GDB stub's
	101	low-level I/O.
	102
	103	config GDBSTUB_DEBUG_BREAKPOINT
	104	bool "Debug GDB stub breakpoint management"
	105	depends on GDBSTUB_DEBUGGING
	106	help
	107	This option causes information to be displayed about GDB stub's
	108	breakpoint management.
	109
	110	choice
	111	prompt "GDB stub port"
95929eff	112	default GDBSTUB_ON_TTYSM0
b920de1b DH	113	depends on GDBSTUB
	114	help
	115	Select the serial port used for GDB-stub.
	116
	117	config GDBSTUB_ON_TTYSM0
	118	bool "/dev/ttySM0 [SIF0]"
	119	depends on MN10300_TTYSM0
	120	select GDBSTUB_ON_TTYSMx
	121
	122	config GDBSTUB_ON_TTYSM1
	123	bool "/dev/ttySM1 [SIF1]"
	124	depends on MN10300_TTYSM1
	125	select GDBSTUB_ON_TTYSMx
	126
	127	config GDBSTUB_ON_TTYSM2
	128	bool "/dev/ttySM2 [SIF2]"
	129	depends on MN10300_TTYSM2
	130	select GDBSTUB_ON_TTYSMx
	131
	132	config GDBSTUB_ON_TTYS0
	133	bool "/dev/ttyS0"
	134	select GDBSTUB_ON_TTYSx
	135
	136	config GDBSTUB_ON_TTYS1
	137	bool "/dev/ttyS1"
	138	select GDBSTUB_ON_TTYSx
	139
	140	endchoice
	141
	142	config GDBSTUB_ON_TTYSMx
	143	bool
	144	depends on GDBSTUB_ON_TTYSM0 \|\| GDBSTUB_ON_TTYSM1 \|\| GDBSTUB_ON_TTYSM2
	145	default y
	146
	147	config GDBSTUB_ON_TTYSx
	148	bool
	149	depends on GDBSTUB_ON_TTYS0 \|\| GDBSTUB_ON_TTYS1
	150	default y
	151
	152	endmenu
792576b1 DH	153
	154	config KERNEL_DEBUGGER
	155	def_bool y
e460d644	156	depends on GDBSTUB \|\| KGDB