projects / deliverable / linux.git / blame
| Commit | Line | Data |
|---|---|---|
| 8c2c3df3 CM |
1 | menu "Kernel hacking" |
| 2 | ||
| 3 | source "lib/Kconfig.debug" | |
| 4 | ||
| 5 | config FRAME_POINTER | |
| 6 | bool | |
| 7 | default y | |
| 8 | ||
| d253b440 LA |
9 | config 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 | ||
| ec45d1cf WD |
23 | config 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 | ||
| da57a369 MR |
31 | config 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 | ||
| 11d91a77 LA |
46 | config DEBUG_SET_MODULE_RONX |
| 47 | bool "Set loadable kernel module data as NX and text as RO" | |
| 48 | depends on MODULES | |
| 49 | help | |
| 50 | This option helps catch unintended modifications to loadable | |
| 51 | kernel module's text and read-only data. It also prevents execution | |
| 52 | of module data. Such protection may interfere with run-time code | |
| 53 | patching and dynamic kernel tracing - and they might also protect | |
| 54 | against certain classes of kernel exploits. | |
| 55 | If in doubt, say "N". | |
| 56 | ||
| 8c2c3df3 | 57 | endmenu |