| menu "Kernel hacking" | |
| source "lib/Kconfig.debug" | |
| config FRAME_POINTER | |
| bool | |
| default y | |
| 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 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. | |
| endmenu |