menu "Kernel hacking" source "lib/Kconfig.debug" config FRAME_POINTER bool default y config DEBUG_STACK_USAGE bool "Enable stack utilization instrumentation" depends on DEBUG_KERNEL help Enables the display of the minimum amount of free stack which each task has ever had available in the sysrq-T output. config STRICT_DEVMEM bool "Filter access to /dev/mem" depends on MMU help If this option is disabled, you allow userspace (root) access to all of memory, including kernel and userspace memory. Accidental access to this is obviously disastrous, but specific access can be used by people debugging the kernel. If this option is switched on, the /dev/mem file only allows userspace access to memory mapped peripherals. If in doubt, say Y. config EARLY_PRINTK bool "Early printk support" default y help Say Y here if you want to have an early console using the earlyprintk=[,][,] kernel parameter. It is assumed that the early console device has been initialised by the boot loader prior to starting the Linux kernel. config PID_IN_CONTEXTIDR bool "Write the current PID to the CONTEXTIDR register" help Enabling this option causes the kernel to write the current PID to the CONTEXTIDR register, at the expense of some additional instructions during context switch. Say Y here only if you are planning to use hardware trace tools with this kernel. config DEBUG_SET_MODULE_RONX bool "Set loadable kernel module data as NX and text as RO" depends on MODULES help This option helps catch unintended modifications to loadable kernel module's text and read-only data. It also prevents execution of module data. Such protection may interfere with run-time code patching and dynamic kernel tracing - and they might also protect against certain classes of kernel exploits. If in doubt, say "N". endmenu