1menu "Kernel hacking" 2 3source "lib/Kconfig.debug" 4 5config ARM64_PTDUMP 6 bool "Export kernel pagetable layout to userspace via debugfs" 7 depends on DEBUG_KERNEL 8 select DEBUG_FS 9 help 10 Say Y here if you want to show the kernel pagetable layout in a 11 debugfs file. This information is only useful for kernel developers 12 who are working in architecture specific areas of the kernel. 13 It is probably not a good idea to enable this feature in a production 14 kernel. 15 16 If in doubt, say N. 17 18config PID_IN_CONTEXTIDR 19 bool "Write the current PID to the CONTEXTIDR register" 20 help 21 Enabling this option causes the kernel to write the current PID to 22 the CONTEXTIDR register, at the expense of some additional 23 instructions during context switch. Say Y here only if you are 24 planning to use hardware trace tools with this kernel. 25 26config ARM64_RANDOMIZE_TEXT_OFFSET 27 bool "Randomize TEXT_OFFSET at build time" 28 help 29 Say Y here if you want the image load offset (AKA TEXT_OFFSET) 30 of the kernel to be randomized at build-time. When selected, 31 this option will cause TEXT_OFFSET to be randomized upon any 32 build of the kernel, and the offset will be reflected in the 33 text_offset field of the resulting Image. This can be used to 34 fuzz-test bootloaders which respect text_offset. 35 36 This option is intended for bootloader and/or kernel testing 37 only. Bootloaders must make no assumptions regarding the value 38 of TEXT_OFFSET and platforms must not require a specific 39 value. 40 41config DEBUG_SET_MODULE_RONX 42 bool "Set loadable kernel module data as NX and text as RO" 43 depends on MODULES 44 default y 45 help 46 Is this is set, kernel module text and rodata will be made read-only. 47 This is to help catch accidental or malicious attempts to change the 48 kernel's executable code. 49 50 If in doubt, say Y. 51 52config DEBUG_RODATA 53 bool "Make kernel text and rodata read-only" 54 default y 55 help 56 If this is set, kernel text and rodata will be made read-only. This 57 is to help catch accidental or malicious attempts to change the 58 kernel's executable code. 59 60 If in doubt, say Y. 61 62config DEBUG_ALIGN_RODATA 63 depends on DEBUG_RODATA 64 bool "Align linker sections up to SECTION_SIZE" 65 help 66 If this option is enabled, sections that may potentially be marked as 67 read only or non-executable will be aligned up to the section size of 68 the kernel. This prevents sections from being split into pages and 69 avoids a potential TLB penalty. The downside is an increase in 70 alignment and potentially wasted space. Turn on this option if 71 performance is more important than memory pressure. 72 73 If in doubt, say N. 74 75source "drivers/hwtracing/coresight/Kconfig" 76 77endmenu 78