1menu "Kernel hacking" 2 3source "lib/Kconfig.debug" 4 5config FRAME_POINTER 6 bool 7 default y 8 9config STRICT_DEVMEM 10 bool "Filter access to /dev/mem" 11 depends on MMU 12 help 13 If this option is disabled, you allow userspace (root) access to all 14 of memory, including kernel and userspace memory. Accidental 15 access to this is obviously disastrous, but specific access can 16 be used by people debugging the kernel. 17 18 If this option is switched on, the /dev/mem file only allows 19 userspace access to memory mapped peripherals. 20 21 If in doubt, say Y. 22 23config PID_IN_CONTEXTIDR 24 bool "Write the current PID to the CONTEXTIDR register" 25 help 26 Enabling this option causes the kernel to write the current PID to 27 the CONTEXTIDR register, at the expense of some additional 28 instructions during context switch. Say Y here only if you are 29 planning to use hardware trace tools with this kernel. 30 31config ARM64_RANDOMIZE_TEXT_OFFSET 32 bool "Randomize TEXT_OFFSET at build time" 33 help 34 Say Y here if you want the image load offset (AKA TEXT_OFFSET) 35 of the kernel to be randomized at build-time. When selected, 36 this option will cause TEXT_OFFSET to be randomized upon any 37 build of the kernel, and the offset will be reflected in the 38 text_offset field of the resulting Image. This can be used to 39 fuzz-test bootloaders which respect text_offset. 40 41 This option is intended for bootloader and/or kernel testing 42 only. Bootloaders must make no assumptions regarding the value 43 of TEXT_OFFSET and platforms must not require a specific 44 value. 45 46endmenu 47