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