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menu "Kernel hacking"
source "lib/Kconfig.debug"
config GDBSTUB
bool "Remote GDB kernel debugging"
depends on DEBUG_KERNEL
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.
choice
prompt "GDB stub port"
default GDBSTUB_UART1
depends on GDBSTUB
help
Select the on-CPU port used for GDB-stub
config GDBSTUB_UART0
bool "/dev/ttyS0"
config GDBSTUB_UART1
bool "/dev/ttyS1"
endchoice
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 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'.
endmenu
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