1 # SPDX-License-Identifier: GPL-2.0-only
2
3 config HAVE_ARCH_KGDB
4 bool
5
6 # set if architecture has the its kgdb_arch_ha
7 # function to enable gdb stub to address XML p
8 config HAVE_ARCH_KGDB_QXFER_PKT
9 bool
10
11 menuconfig KGDB
12 bool "KGDB: kernel debugger"
13 depends on HAVE_ARCH_KGDB
14 depends on DEBUG_KERNEL
15 help
16 If you say Y here, it will be possib
17 kernel using gdb. It is recommended
18 you also turn on the kernel config o
19 CONFIG_FRAME_POINTER to aid in produ
20 backtraces in the external debugger.
21 kernel debugger is available at http
22 as well as in Documentation/dev-tool
23 unsure, say N.
24
25 if KGDB
26
27 config KGDB_HONOUR_BLOCKLIST
28 bool "KGDB: use kprobe blocklist to pr
29 depends on HAVE_KPROBES
30 depends on MODULES
31 select KPROBES
32 default y
33 help
34 If set to Y the debug core will use
35 identify symbols where it is unsafe
36 In particular this disallows instrum
37 called during debug trap handling an
38 difficult to inadvertently provoke r
39
40 If unsure, say Y.
41
42 config KGDB_SERIAL_CONSOLE
43 tristate "KGDB: use kgdb over the seri
44 select CONSOLE_POLL
45 select MAGIC_SYSRQ
46 depends on TTY && VT
47 default y
48 help
49 Share a serial console with kgdb. Sy
50 to break in initially.
51
52 config KGDB_TESTS
53 bool "KGDB: internal test suite"
54 default n
55 help
56 This is a kgdb I/O module specifical
57 kgdb's internal functions. This kgd
58 intended to for the development of n
59 as well as regression testing the kg
60 See the drivers/misc/kgdbts.c for th
61 the tests. The most basic of this I
62 a kernel boot arguments "kgdbwait kg
63
64 config KGDB_TESTS_ON_BOOT
65 bool "KGDB: Run tests on boot"
66 depends on KGDB_TESTS
67 default n
68 help
69 Run the kgdb tests on boot up automa
70 to pass in a kernel parameter
71
72 config KGDB_TESTS_BOOT_STRING
73 string "KGDB: which internal kgdb test
74 depends on KGDB_TESTS_ON_BOOT
75 default "V1F100"
76 help
77 This is the command string to send t
78 boot. See the drivers/misc/kgdbts.c
79 information about other strings you
80 default of V1F100.
81
82 config KGDB_LOW_LEVEL_TRAP
83 bool "KGDB: Allow debugging with traps
84 depends on X86 || MIPS
85 default n
86 help
87 This will add an extra call back to k
88 exception handler which will allow kg
89 notify handler.
90
91 config KGDB_KDB
92 bool "KGDB_KDB: include kdb frontend f
93 default n
94 help
95 KDB frontend for kernel
96
97 config KDB_DEFAULT_ENABLE
98 hex "KDB: Select kdb command functions
99 depends on KGDB_KDB
100 default 0x1
101 help
102 Specifiers which kdb commands are en
103 be set to 1 or 0 to enable all comma
104 commands.
105
106 Alternatively the following bitmask
107
108 0x0002 - allow arbitrary reads fro
109 0x0004 - allow arbitrary writes to
110 0x0008 - allow current register st
111 0x0010 - allow current register st
112 0x0020 - allow passive inspection
113 0x0040 - allow flow control manage
114 0x0080 - enable signalling of proc
115 0x0100 - allow machine to be reboo
116
117 The config option merely sets the de
118 issuing 'echo X > /sys/module/kdb/pa
119 setting with kdb.cmd_enable=X kernel
120 override the default settings.
121
122 config KDB_KEYBOARD
123 bool "KGDB_KDB: keyboard as input devi
124 depends on VT && KGDB_KDB && !PARISC
125 depends on HAS_IOPORT
126 default n
127 help
128 KDB can use a PS/2 type keyboard for
129
130 config KDB_CONTINUE_CATASTROPHIC
131 int "KDB: continue after catastrophic
132 depends on KGDB_KDB
133 default "0"
134 help
135 This integer controls the behaviour
136 catastrophic error, i.e. for a panic
137 When KDB is active and a catastrophi
138 will happen until you type 'go'.
139 CONFIG_KDB_CONTINUE_CATASTROPHIC ==
140 you type 'go', you will be warned by
141 'go', KDB tries to continue. No guar
142 kernel is still usable in this situa
143 CONFIG_KDB_CONTINUE_CATASTROPHIC ==
144 No guarantees that the kernel is sti
145 CONFIG_KDB_CONTINUE_CATASTROPHIC ==
146 If you are not sure, say 0.
147
148 config ARCH_HAS_EARLY_DEBUG
149 bool
150 default n
151 help
152 If an architecture can definitely ha
153 when early_param's are parsed then i
154 Otherwise, if "kgdbwait" is passed o
155 won't actually be processed until db
156 call to kgdb_arch_late() is made.
157
158 NOTE: Even if this isn't selected by
159 still try to register kgdb to handle
160 when early_param's are parsed, we ju
161 "kgdbwait" parameter until dbg_late_
162 crash and try to drop into kgdb some
163 places you might or might not end up
164 depending on exactly how far along t
165
166 endif # KGDB
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