LXR linux/arch/sh/Kconfig.debug

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