LXR linux/arch/sh/Kconfig.debug

   1# SPDX-License-Identifier: GPL-2.0
   2
   3config TRACE_IRQFLAGS_SUPPORT
   4        def_bool y
   5
   6config SH_STANDARD_BIOS
   7        bool "Use LinuxSH standard BIOS"
   8        depends on SUPERH32
   9        help
  10          Say Y here if your target has the gdb-sh-stub
  11          package from www.m17n.org (or any conforming standard LinuxSH BIOS)
  12          in FLASH or EPROM.  The kernel will use standard BIOS calls during
  13          boot for various housekeeping tasks (including calls to read and
  14          write characters to a system console, get a MAC address from an
  15          on-board Ethernet interface, and shut down the hardware).  Note this
  16          does not work with machines with an existing operating system in
  17          mask ROM and no flash (WindowsCE machines fall in this category).
  18          If unsure, say N.
  19
  20config STACK_DEBUG
  21        bool "Check for stack overflows"
  22        depends on DEBUG_KERNEL && SUPERH32
  23        help
  24          This option will cause messages to be printed if free stack space
  25          drops below a certain limit. Saying Y here will add overhead to
  26          every function call and will therefore incur a major
  27          performance hit. Most users should say N.
  28
  29config 4KSTACKS
  30        bool "Use 4Kb for kernel stacks instead of 8Kb"
  31        depends on DEBUG_KERNEL && (MMU || BROKEN) && !PAGE_SIZE_64KB
  32        help
  33          If you say Y here the kernel will use a 4Kb stacksize for the
  34          kernel stack attached to each process/thread. This facilitates
  35          running more threads on a system and also reduces the pressure
  36          on the VM subsystem for higher order allocations. This option
  37          will also use IRQ stacks to compensate for the reduced stackspace.
  38
  39config IRQSTACKS
  40        bool "Use separate kernel stacks when processing interrupts"
  41        depends on DEBUG_KERNEL && SUPERH32 && BROKEN
  42        help
  43          If you say Y here the kernel will use separate kernel stacks
  44          for handling hard and soft interrupts.  This can help avoid
  45          overflowing the process kernel stacks.
  46
  47config DUMP_CODE
  48        bool "Show disassembly of nearby code in register dumps"
  49        depends on DEBUG_KERNEL && SUPERH32
  50        default y if DEBUG_BUGVERBOSE
  51        default n
  52        help
  53          This prints out a code trace of the instructions leading up to
  54          the faulting instruction as a debugging aid. As this does grow
  55          the kernel in size a bit, most users will want to say N here.
  56
  57          Those looking for more verbose debugging output should say Y.
  58
  59config DWARF_UNWINDER
  60        bool "Enable the DWARF unwinder for stacktraces"
  61        select FRAME_POINTER
  62        depends on SUPERH32
  63        default n
  64        help
  65          Enabling this option will make stacktraces more accurate, at
  66          the cost of an increase in overall kernel size.
  67
  68config SH_NO_BSS_INIT
  69        bool "Avoid zeroing BSS (to speed-up startup on suitable platforms)"
  70        depends on DEBUG_KERNEL
  71        default n
  72        help
  73          If running in painfully slow environments, such as an RTL
  74          simulation or from remote memory via SHdebug, where the memory
  75          can already be guaranteed to ber zeroed on boot, say Y.
  76
  77          For all other cases, say N. If this option seems perplexing, or
  78          you aren't sure, say N.
  79
  80config SH64_SR_WATCH
  81        bool "Debug: set SR.WATCH to enable hardware watchpoints and trace"
  82        depends on SUPERH64
  83
  84config MCOUNT
  85        def_bool y
  86        depends on SUPERH32
  87        depends on STACK_DEBUG || FUNCTION_TRACER
  88