Root/arch/sh/Kconfig.debug

Source at commit 0de2b2b3be81048189a32f7a3d3ba0ba9ec817b6 created 9 years 1 day ago.
By Maarten ter Huurne, MIPS: JZ4740: Fixed value for round robin constant.
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 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
41config 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
49config 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
61config DWARF_UNWINDER
62    bool "Enable the DWARF unwinder for stacktraces"
63    select FRAME_POINTER
64    default n
65    help
66      Enabling this option will make stacktraces more accurate, at
67      the cost of an increase in overall kernel size.
68
69config SH_NO_BSS_INIT
70    bool "Avoid zeroing BSS (to speed-up startup on suitable platforms)"
71    depends on DEBUG_KERNEL
72    default n
73    help
74      If running in painfully slow environments, such as an RTL
75      simulation or from remote memory via SHdebug, where the memory
76      can already be guaranteed to ber zeroed on boot, say Y.
77
78      For all other cases, say N. If this option seems perplexing, or
79      you aren't sure, say N.
80
81config SH64_SR_WATCH
82    bool "Debug: set SR.WATCH to enable hardware watchpoints and trace"
83    depends on SUPERH64
84
85config MCOUNT
86    def_bool y
87    depends on SUPERH32
88    depends on STACK_DEBUG || FUNCTION_TRACER
89
90endmenu
91

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