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Linux/lib/Kconfig.kgdb

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Diff markup

Differences between /lib/Kconfig.kgdb (Version linux-6.11.5) and /lib/Kconfig.kgdb (Version linux-5.8.18)


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

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