[linux-2.6-block.git] / arch / sh / Kconfig.debug

menu "Kernel hacking"

config TRACE_IRQFLAGS_SUPPORT
	def_bool y

source "lib/Kconfig.debug"

config SH_STANDARD_BIOS
	bool "Use LinuxSH standard BIOS"
	depends on SUPERH32
	help
	  Say Y here if your target has the gdb-sh-stub
	  package from www.m17n.org (or any conforming standard LinuxSH BIOS)
	  in FLASH or EPROM.  The kernel will use standard BIOS calls during
	  boot for various housekeeping tasks (including calls to read and
	  write characters to a system console, get a MAC address from an
	  on-board Ethernet interface, and shut down the hardware).  Note this
	  does not work with machines with an existing operating system in
	  mask ROM and no flash (WindowsCE machines fall in this category).
	  If unsure, say N.

config STACK_DEBUG
	bool "Check for stack overflows"
	depends on DEBUG_KERNEL && SUPERH32
	help
	  This option will cause messages to be printed if free stack space
	  drops below a certain limit. Saying Y here will add overhead to
	  every function call and will therefore incur a major
	  performance hit. Most users should say N.

config 4KSTACKS
	bool "Use 4Kb for kernel stacks instead of 8Kb"
	depends on DEBUG_KERNEL && (MMU || BROKEN) && !PAGE_SIZE_64KB
	help
	  If you say Y here the kernel will use a 4Kb stacksize for the
	  kernel stack attached to each process/thread. This facilitates
	  running more threads on a system and also reduces the pressure
	  on the VM subsystem for higher order allocations. This option
	  will also use IRQ stacks to compensate for the reduced stackspace.

config IRQSTACKS
	bool "Use separate kernel stacks when processing interrupts"
	depends on DEBUG_KERNEL && SUPERH32 && BROKEN
	help
	  If you say Y here the kernel will use separate kernel stacks
	  for handling hard and soft interrupts.  This can help avoid
	  overflowing the process kernel stacks.

config DUMP_CODE
	bool "Show disassembly of nearby code in register dumps"
	depends on DEBUG_KERNEL && SUPERH32
	default y if DEBUG_BUGVERBOSE
	default n
	help
	  This prints out a code trace of the instructions leading up to
	  the faulting instruction as a debugging aid. As this does grow
	  the kernel in size a bit, most users will want to say N here.

	  Those looking for more verbose debugging output should say Y.

config DWARF_UNWINDER
	bool "Enable the DWARF unwinder for stacktraces"
	select FRAME_POINTER
	depends on SUPERH32
	default n
	help
	  Enabling this option will make stacktraces more accurate, at
	  the cost of an increase in overall kernel size.

config SH_NO_BSS_INIT
	bool "Avoid zeroing BSS (to speed-up startup on suitable platforms)"
	depends on DEBUG_KERNEL
	default n
	help
	  If running in painfully slow environments, such as an RTL
	  simulation or from remote memory via SHdebug, where the memory
	  can already be guaranteed to ber zeroed on boot, say Y.

	  For all other cases, say N. If this option seems perplexing, or
	  you aren't sure, say N.

config SH64_SR_WATCH
	bool "Debug: set SR.WATCH to enable hardware watchpoints and trace"
	depends on SUPERH64

config MCOUNT
	def_bool y
	depends on SUPERH32
	depends on STACK_DEBUG || FUNCTION_TRACER

endmenu
Commit	Line	Data
1da177e4 LT	1	menu "Kernel hacking"
1da177e4 LT	2
afbfb52e	3	config TRACE_IRQFLAGS_SUPPORT
d7ef4fb3	4	def_bool y
afbfb52e	5
1da177e4 LT	6	source "lib/Kconfig.debug"
	7
	8	config SH_STANDARD_BIOS
	9	bool "Use LinuxSH standard BIOS"
1a013e2f	10	depends on SUPERH32
1da177e4 LT	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
9f14b84a	22	config STACK_DEBUG
d153ea88	23	bool "Check for stack overflows"
5db141a9	24	depends on DEBUG_KERNEL && SUPERH32
d153ea88 PM	25	help
d153ea88 PM	26	This option will cause messages to be printed if free stack space
9f14b84a PM	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.
d153ea88	30
a6a31139 PM	31	config 4KSTACKS
a6a31139 PM	32	bool "Use 4Kb for kernel stacks instead of 8Kb"
b817f7e0	33	depends on DEBUG_KERNEL && (MMU \|\| BROKEN) && !PAGE_SIZE_64KB
a6a31139 PM	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
110ed282 PM	41	config IRQSTACKS
110ed282 PM	42	bool "Use separate kernel stacks when processing interrupts"
40c8bca7	43	depends on DEBUG_KERNEL && SUPERH32 && BROKEN
110ed282 PM	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
5d2685d0 PM	49	config 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
bd353861 MF	61	config DWARF_UNWINDER
	62	bool "Enable the DWARF unwinder for stacktraces"
	63	select FRAME_POINTER
da47f4a3	64	depends on SUPERH32
bd353861 MF	65	default n
	66	help
	67	Enabling this option will make stacktraces more accurate, at
	68	the cost of an increase in overall kernel size.
	69
740a3e67 PM	70	config SH_NO_BSS_INIT
	71	bool "Avoid zeroing BSS (to speed-up startup on suitable platforms)"
	72	depends on DEBUG_KERNEL
	73	default n
	74	help
	75	If running in painfully slow environments, such as an RTL
	76	simulation or from remote memory via SHdebug, where the memory
25985edc	77	can already be guaranteed to ber zeroed on boot, say Y.
740a3e67 PM	78
	79	For all other cases, say N. If this option seems perplexing, or
	80	you aren't sure, say N.
	81
8214d52a PM	82	config SH64_SR_WATCH
8214d52a PM	83	bool "Debug: set SR.WATCH to enable hardware watchpoints and trace"
fe58cac3	84	depends on SUPERH64
8214d52a	85
473d1cf4 PM	86	config MCOUNT
	87	def_bool y
	88	depends on SUPERH32
	89	depends on STACK_DEBUG \|\| FUNCTION_TRACER
	90
1da177e4	91	endmenu