| 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 |
