arch/sh/Kconfig.debug

   1 # SPDX-License-Identifier: GPL-2.0
   2 menu "Kernel hacking"
   3
   4 config TRACE_IRQFLAGS_SUPPORT
   5         def_bool y
   6
   7 source "lib/Kconfig.debug"
   8
   9 config SH_STANDARD_BIOS
  10         bool "Use LinuxSH standard BIOS"
  11         depends on SUPERH32
  12         help
  13           Say Y here if your target has the gdb-sh-stub
  14           package from www.m17n.org (or any conforming standard LinuxSH BIOS)
  15           in FLASH or EPROM.  The kernel will use standard BIOS calls during
  16           boot for various housekeeping tasks (including calls to read and
  17           write characters to a system console, get a MAC address from an
  18           on-board Ethernet interface, and shut down the hardware).  Note this
  19           does not work with machines with an existing operating system in
  20           mask ROM and no flash (WindowsCE machines fall in this category).
  21           If unsure, say N.
  22
  23 config STACK_DEBUG
  24         bool "Check for stack overflows"
  25         depends on DEBUG_KERNEL && SUPERH32
  26         help
  27           This option will cause messages to be printed if free stack space
  28           drops below a certain limit. Saying Y here will add overhead to
  29           every function call and will therefore incur a major
  30           performance hit. Most users should say N.
  31
  32 config 4KSTACKS
  33         bool "Use 4Kb for kernel stacks instead of 8Kb"
  34         depends on DEBUG_KERNEL && (MMU || BROKEN) && !PAGE_SIZE_64KB
  35         help
  36           If you say Y here the kernel will use a 4Kb stacksize for the
  37           kernel stack attached to each process/thread. This facilitates
  38           running more threads on a system and also reduces the pressure
  39           on the VM subsystem for higher order allocations. This option
  40           will also use IRQ stacks to compensate for the reduced stackspace.
  41
  42 config IRQSTACKS
  43         bool "Use separate kernel stacks when processing interrupts"
  44         depends on DEBUG_KERNEL && SUPERH32 && BROKEN
  45         help
  46           If you say Y here the kernel will use separate kernel stacks
  47           for handling hard and soft interrupts.  This can help avoid
  48           overflowing the process kernel stacks.
  49
  50 config DUMP_CODE
  51         bool "Show disassembly of nearby code in register dumps"
  52         depends on DEBUG_KERNEL && SUPERH32
  53         default y if DEBUG_BUGVERBOSE
  54         default n
  55         help
  56           This prints out a code trace of the instructions leading up to
  57           the faulting instruction as a debugging aid. As this does grow
  58           the kernel in size a bit, most users will want to say N here.
  59
  60           Those looking for more verbose debugging output should say Y.
  61
  62 config DWARF_UNWINDER
  63         bool "Enable the DWARF unwinder for stacktraces"
  64         select FRAME_POINTER
  65         depends on SUPERH32
  66         default n
  67         help
  68           Enabling this option will make stacktraces more accurate, at
  69           the cost of an increase in overall kernel size.
  70
  71 config SH_NO_BSS_INIT
  72         bool "Avoid zeroing BSS (to speed-up startup on suitable platforms)"
  73         depends on DEBUG_KERNEL
  74         default n
  75         help
  76           If running in painfully slow environments, such as an RTL
  77           simulation or from remote memory via SHdebug, where the memory
  78           can already be guaranteed to ber zeroed on boot, say Y.
  79
  80           For all other cases, say N. If this option seems perplexing, or
  81           you aren't sure, say N.
  82
  83 config SH64_SR_WATCH
  84         bool "Debug: set SR.WATCH to enable hardware watchpoints and trace"
  85         depends on SUPERH64
  86
  87 config MCOUNT
  88         def_bool y
  89         depends on SUPERH32
  90         depends on STACK_DEBUG || FUNCTION_TRACER
  91
  92 endmenu