Root/arch/sh/Kconfig.debug

1menu "Kernel hacking"
2
3config TRACE_IRQFLAGS_SUPPORT
4    def_bool y
5
6source "lib/Kconfig.debug"
7
8config 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
22config 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
31config 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
40config 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
50config 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
58config 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
70config 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
78config 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 gauranteed 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
90config SH64_SR_WATCH
91    bool "Debug: set SR.WATCH to enable hardware watchpoints and trace"
92    depends on SUPERH64
93
94config MCOUNT
95    def_bool y
96    depends on SUPERH32
97    depends on STACK_DEBUG || FUNCTION_TRACER
98
99endmenu
100

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