arch/arm64/Kconfig.debug

   1 menu "Kernel hacking"
   2
   3 source "lib/Kconfig.debug"
   4
   5 config 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
  18 config 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
  26 config 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
  41 config 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
  52 config DEBUG_ALIGN_RODATA
  53         depends on DEBUG_RODATA
  54         bool "Align linker sections up to SECTION_SIZE"
  55         help
  56           If this option is enabled, sections that may potentially be marked as
  57           read only or non-executable will be aligned up to the section size of
  58           the kernel. This prevents sections from being split into pages and
  59           avoids a potential TLB penalty. The downside is an increase in
  60           alignment and potentially wasted space. Turn on this option if
  61           performance is more important than memory pressure.
  62
  63           If in doubt, say N.
  64
  65 source "drivers/hwtracing/coresight/Kconfig"
  66
  67 endmenu