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 4KSTACKS
  32         bool "Use 4Kb for kernel stacks instead of 8Kb"
  33         depends on DEBUG_KERNEL && (MMU || BROKEN) && !PAGE_SIZE_64KB
  34         help
  35           If you say Y here the kernel will use a 4Kb stacksize for the
  36           kernel stack attached to each process/thread. This facilitates
  37           running more threads on a system and also reduces the pressure
  38           on the VM subsystem for higher order allocations. This option
  39           will also use IRQ stacks to compensate for the reduced stackspace.
  40
  41 config IRQSTACKS
  42         bool "Use separate kernel stacks when processing interrupts"
  43         depends on DEBUG_KERNEL && SUPERH32 && BROKEN
  44         help
  45           If you say Y here the kernel will use separate kernel stacks
  46           for handling hard and soft interrupts.  This can help avoid
  47           overflowing the process kernel stacks.
  48
  49 config DUMP_CODE
  50         bool "Show disassembly of nearby code in register dumps"
  51         depends on DEBUG_KERNEL && SUPERH32
  52         default y if DEBUG_BUGVERBOSE
  53         default n
  54         help
  55           This prints out a code trace of the instructions leading up to
  56           the faulting instruction as a debugging aid. As this does grow
  57           the kernel in size a bit, most users will want to say N here.
  58
  59           Those looking for more verbose debugging output should say Y.
  60
  61 config DWARF_UNWINDER
  62         bool "Enable the DWARF unwinder for stacktraces"
  63         select FRAME_POINTER
  64         depends on SUPERH32
  65         default n
  66         help
  67           Enabling this option will make stacktraces more accurate, at
  68           the cost of an increase in overall kernel size.
  69
  70 config SH_NO_BSS_INIT
  71         bool "Avoid zeroing BSS (to speed-up startup on suitable platforms)"
  72         depends on DEBUG_KERNEL
  73         default n
  74         help
  75           If running in painfully slow environments, such as an RTL
  76           simulation or from remote memory via SHdebug, where the memory
  77           can already be guaranteed to ber zeroed on boot, say Y.
  78
  79           For all other cases, say N. If this option seems perplexing, or
  80           you aren't sure, say N.
  81
  82 config SH64_SR_WATCH
  83         bool "Debug: set SR.WATCH to enable hardware watchpoints and trace"
  84         depends on SUPERH64
  85
  86 config MCOUNT
  87         def_bool y
  88         depends on SUPERH32
  89         depends on STACK_DEBUG || FUNCTION_TRACER
  90
  91 endmenu