[net-next-2.6.git] / arch / parisc / Kconfig.debug

menu "Kernel hacking"

source "lib/Kconfig.debug"

config DEBUG_RODATA
       bool "Write protect kernel read-only data structures"
       depends on DEBUG_KERNEL
       help
         Mark the kernel read-only data as write-protected in the pagetables,
         in order to catch accidental (and incorrect) writes to such const
         data. This option may have a slight performance impact because a
         portion of the kernel code won't be covered by a TLB anymore.
         If in doubt, say "N".

config DEBUG_STRICT_USER_COPY_CHECKS
	bool "Strict copy size checks"
	depends on DEBUG_KERNEL && !TRACE_BRANCH_PROFILING
	---help---
	  Enabling this option turns a certain set of sanity checks for user
	  copy operations into compile time failures.

	  The copy_from_user() etc checks are there to help test if there
	  are sufficient security checks on the length argument of
	  the copy operation, by having gcc prove that the argument is
	  within bounds.

	  If unsure, or if you run an older (pre 4.4) gcc, say N.

endmenu
Commit	Line	Data
1da177e4 LT	1	menu "Kernel hacking"
	2
	3	source "lib/Kconfig.debug"
	4
1bcdd854 HD	5	config DEBUG_RODATA
	6	bool "Write protect kernel read-only data structures"
	7	depends on DEBUG_KERNEL
	8	help
	9	Mark the kernel read-only data as write-protected in the pagetables,
	10	in order to catch accidental (and incorrect) writes to such const
	11	data. This option may have a slight performance impact because a
	12	portion of the kernel code won't be covered by a TLB anymore.
	13	If in doubt, say "N".
	14
888c31fc HD	15	config DEBUG_STRICT_USER_COPY_CHECKS
	16	bool "Strict copy size checks"
	17	depends on DEBUG_KERNEL && !TRACE_BRANCH_PROFILING
	18	---help---
	19	Enabling this option turns a certain set of sanity checks for user
	20	copy operations into compile time failures.
	21
	22	The copy_from_user() etc checks are there to help test if there
	23	are sufficient security checks on the length argument of
	24	the copy operation, by having gcc prove that the argument is
	25	within bounds.
	26
	27	If unsure, or if you run an older (pre 4.4) gcc, say N.
	28
1da177e4	29	endmenu