1 # SPDX-License-Identifier: GPL-2.0
4 source "lib/Kconfig.debug"
6 config DEBUG_DECOMPRESS_KERNEL
7 bool "Using serial port during decompressing kernel"
8 depends on DEBUG_KERNEL
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.
15 config TEST_MISALIGNMENT_HANDLER
16 bool "Run tests on the misalignment handler"
17 depends on DEBUG_KERNEL
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.
26 depends on DEBUG_KERNEL
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.
35 bool "Remote GDB kernel debugging"
36 depends on DEBUG_KERNEL && DEPRECATED
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.
46 This is deprecated in favour of KGDB and will be removed in a later
49 config GDBSTUB_IMMEDIATE
50 bool "Break into GDB stub immediately"
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.
57 config GDBSTUB_ALLOW_SINGLE_STEP
58 bool "Allow software single-stepping in GDB stub"
59 depends on GDBSTUB && !SMP && !PREEMPT
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.
66 bool "Console output to GDB"
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'.
73 config GDBSTUB_DEBUGGING
74 bool "Debug GDB stub by messages to serial port"
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
82 config GDBSTUB_DEBUG_ENTRY
83 bool "Debug GDB stub entry"
84 depends on GDBSTUB_DEBUGGING
86 This option causes information to be displayed about entry to or exit
87 from the main GDB stub routine.
89 config GDBSTUB_DEBUG_PROTOCOL
90 bool "Debug GDB stub protocol"
91 depends on GDBSTUB_DEBUGGING
93 This option causes information to be displayed about the GDB remote
94 protocol messages generated exchanged with GDB.
96 config GDBSTUB_DEBUG_IO
97 bool "Debug GDB stub I/O"
98 depends on GDBSTUB_DEBUGGING
100 This option causes information to be displayed about GDB stub's
103 config GDBSTUB_DEBUG_BREAKPOINT
104 bool "Debug GDB stub breakpoint management"
105 depends on GDBSTUB_DEBUGGING
107 This option causes information to be displayed about GDB stub's
108 breakpoint management.
111 prompt "GDB stub port"
112 default GDBSTUB_ON_TTYSM0
115 Select the serial port used for GDB-stub.
117 config GDBSTUB_ON_TTYSM0
118 bool "/dev/ttySM0 [SIF0]"
119 depends on MN10300_TTYSM0
120 select GDBSTUB_ON_TTYSMx
122 config GDBSTUB_ON_TTYSM1
123 bool "/dev/ttySM1 [SIF1]"
124 depends on MN10300_TTYSM1
125 select GDBSTUB_ON_TTYSMx
127 config GDBSTUB_ON_TTYSM2
128 bool "/dev/ttySM2 [SIF2]"
129 depends on MN10300_TTYSM2
130 select GDBSTUB_ON_TTYSMx
132 config GDBSTUB_ON_TTYS0
134 select GDBSTUB_ON_TTYSx
136 config GDBSTUB_ON_TTYS1
138 select GDBSTUB_ON_TTYSx
142 config GDBSTUB_ON_TTYSMx
144 depends on GDBSTUB_ON_TTYSM0 || GDBSTUB_ON_TTYSM1 || GDBSTUB_ON_TTYSM2
147 config GDBSTUB_ON_TTYSx
149 depends on GDBSTUB_ON_TTYS0 || GDBSTUB_ON_TTYS1
154 config KERNEL_DEBUGGER
156 depends on GDBSTUB || KGDB