arch/frv/Kconfig.debug

   1 menu "Kernel hacking"
   2
   3 source "lib/Kconfig.debug"
   4
   5 config EARLY_PRINTK
   6         bool "Early printk"
   7         depends on EMBEDDED && DEBUG_KERNEL
   8         default n
   9         help
  10           Write kernel log output directly into the VGA buffer or to a serial
  11           port.
  12
  13           This is useful for kernel debugging when your machine crashes very
  14           early before the console code is initialized. For normal operation
  15           it is not recommended because it looks ugly and doesn't cooperate
  16           with klogd/syslogd or the X server. You should normally N here,
  17           unless you want to debug such a crash.
  18
  19 config DEBUG_STACKOVERFLOW
  20         bool "Check for stack overflows"
  21         depends on DEBUG_KERNEL
  22
  23 config DEBUG_PAGEALLOC
  24         bool "Page alloc debugging"
  25         depends on DEBUG_KERNEL
  26         help
  27           Unmap pages from the kernel linear mapping after free_pages().
  28           This results in a large slowdown, but helps to find certain types
  29           of memory corruptions.
  30
  31 config GDBSTUB
  32         bool "Remote GDB kernel debugging"
  33         depends on DEBUG_KERNEL
  34         select DEBUG_INFO
  35         select FRAME_POINTER
  36         help
  37           If you say Y here, it will be possible to remotely debug the kernel
  38           using gdb. This enlarges your kernel ELF image disk size by several
  39           megabytes and requires a machine with more than 16 MB, better 32 MB
  40           RAM to avoid excessive linking time. This is only useful for kernel
  41           hackers. If unsure, say N.
  42
  43 choice
  44         prompt "GDB stub port"
  45         default GDBSTUB_UART1
  46         depends on GDBSTUB
  47         help
  48           Select the on-CPU port used for GDB-stub
  49
  50 config GDBSTUB_UART0
  51         bool "/dev/ttyS0"
  52
  53 config GDBSTUB_UART1
  54         bool "/dev/ttyS1"
  55
  56 endchoice
  57
  58 config GDBSTUB_IMMEDIATE
  59         bool "Break into GDB stub immediately"
  60         depends on GDBSTUB
  61         help
  62           If you say Y here, GDB stub will break into the program as soon as
  63           possible, leaving the program counter at the beginning of
  64           start_kernel() in init/main.c.
  65
  66 config GDB_CONSOLE
  67         bool "Console output to GDB"
  68         depends on GDBSTUB
  69         help
  70           If you are using GDB for remote debugging over a serial port and
  71           would like kernel messages to be formatted into GDB $O packets so
  72           that GDB prints them as program output, say 'Y'.
  73
  74 endmenu