| 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 |