arch/sh/Kconfig.debug

   1 menu "Kernel hacking"
   2
   3 config TRACE_IRQFLAGS_SUPPORT
   4         def_bool y
   5
   6 source "lib/Kconfig.debug"
   7
   8 config SH_STANDARD_BIOS
   9         bool "Use LinuxSH standard BIOS"
  10         depends on SUPERH32
  11         help
  12           Say Y here if your target has the gdb-sh-stub
  13           package from www.m17n.org (or any conforming standard LinuxSH BIOS)
  14           in FLASH or EPROM.  The kernel will use standard BIOS calls during
  15           boot for various housekeeping tasks (including calls to read and
  16           write characters to a system console, get a MAC address from an
  17           on-board Ethernet interface, and shut down the hardware).  Note this
  18           does not work with machines with an existing operating system in
  19           mask ROM and no flash (WindowsCE machines fall in this category).
  20           If unsure, say N.
  21
  22 config STACK_DEBUG
  23         bool "Check for stack overflows"
  24         depends on DEBUG_KERNEL && SUPERH32
  25         help
  26           This option will cause messages to be printed if free stack space
  27           drops below a certain limit. Saying Y here will add overhead to
  28           every function call and will therefore incur a major
  29           performance hit. Most users should say N.
  30
  31 config DEBUG_STACK_USAGE
  32         bool "Stack utilization instrumentation"
  33         depends on DEBUG_KERNEL
  34         help
  35           Enables the display of the minimum amount of free stack which each
  36           task has ever had available in the sysrq-T and sysrq-P debug output.
  37
  38           This option will slow down process creation somewhat.
  39
  40 config 4KSTACKS
  41         bool "Use 4Kb for kernel stacks instead of 8Kb"
  42         depends on DEBUG_KERNEL && (MMU || BROKEN) && !PAGE_SIZE_64KB
  43         help
  44           If you say Y here the kernel will use a 4Kb stacksize for the
  45           kernel stack attached to each process/thread. This facilitates
  46           running more threads on a system and also reduces the pressure
  47           on the VM subsystem for higher order allocations. This option
  48           will also use IRQ stacks to compensate for the reduced stackspace.
  49
  50 config IRQSTACKS
  51         bool "Use separate kernel stacks when processing interrupts"
  52         depends on DEBUG_KERNEL && SUPERH32 && BROKEN
  53         help
  54           If you say Y here the kernel will use separate kernel stacks
  55           for handling hard and soft interrupts.  This can help avoid
  56           overflowing the process kernel stacks.
  57
  58 config DUMP_CODE
  59         bool "Show disassembly of nearby code in register dumps"
  60         depends on DEBUG_KERNEL && SUPERH32
  61         default y if DEBUG_BUGVERBOSE
  62         default n
  63         help
  64           This prints out a code trace of the instructions leading up to
  65           the faulting instruction as a debugging aid. As this does grow
  66           the kernel in size a bit, most users will want to say N here.
  67
  68           Those looking for more verbose debugging output should say Y.
  69
  70 config DWARF_UNWINDER
  71         bool "Enable the DWARF unwinder for stacktraces"
  72         select FRAME_POINTER
  73         default n
  74         help
  75           Enabling this option will make stacktraces more accurate, at
  76           the cost of an increase in overall kernel size.
  77
  78 config SH_NO_BSS_INIT
  79         bool "Avoid zeroing BSS (to speed-up startup on suitable platforms)"
  80         depends on DEBUG_KERNEL
  81         default n
  82         help
  83           If running in painfully slow environments, such as an RTL
  84           simulation or from remote memory via SHdebug, where the memory
  85           can already be guaranteed to ber zeroed on boot, say Y.
  86
  87           For all other cases, say N. If this option seems perplexing, or
  88           you aren't sure, say N.
  89
  90 config SH64_SR_WATCH
  91         bool "Debug: set SR.WATCH to enable hardware watchpoints and trace"
  92         depends on SUPERH64
  93
  94 config MCOUNT
  95         def_bool y
  96         depends on SUPERH32
  97         depends on STACK_DEBUG || FUNCTION_TRACER
  98
  99 endmenu