linux/kernel/debug/kdb
Kees Cook d2aa1acad2 mm/init: Add 'rodata=off' boot cmdline parameter to disable read-only kernel mappings
It may be useful to debug writes to the readonly sections of memory,
so provide a cmdline "rodata=off" to allow for this. This can be
expanded in the future to support "log" and "write" modes, but that
will need to be architecture-specific.

This also makes KDB software breakpoints more usable, as read-only
mappings can now be disabled on any kernel.

Suggested-by: H. Peter Anvin <hpa@zytor.com>
Signed-off-by: Kees Cook <keescook@chromium.org>
Cc: Andy Lutomirski <luto@amacapital.net>
Cc: Arnd Bergmann <arnd@arndb.de>
Cc: Borislav Petkov <bp@alien8.de>
Cc: Brian Gerst <brgerst@gmail.com>
Cc: David Brown <david.brown@linaro.org>
Cc: Denys Vlasenko <dvlasenk@redhat.com>
Cc: Emese Revfy <re.emese@gmail.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Mathias Krause <minipli@googlemail.com>
Cc: Michael Ellerman <mpe@ellerman.id.au>
Cc: PaX Team <pageexec@freemail.hu>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: kernel-hardening@lists.openwall.com
Cc: linux-arch <linux-arch@vger.kernel.org>
Link: http://lkml.kernel.org/r/1455748879-21872-3-git-send-email-keescook@chromium.org
Signed-off-by: Ingo Molnar <mingo@kernel.org>
2016-02-22 08:51:37 +01:00
..
.gitignore kdb: core for kgdb back end (1 of 2) 2010-05-20 21:04:20 -05:00
Makefile kgdboc,keyboard: Keyboard driver for kdb with kgdb 2010-05-20 21:04:24 -05:00
kdb_bp.c mm/init: Add 'rodata=off' boot cmdline parameter to disable read-only kernel mappings 2016-02-22 08:51:37 +01:00
kdb_bt.c kernel/printk: use symbolic defines for console loglevels 2014-06-04 16:54:17 -07:00
kdb_cmds kdb: cleanup unused variables missed in the original kdb merge 2011-08-01 13:23:58 -05:00
kdb_debugger.c kgdb: timeout if secondary CPUs ignore the roundup 2014-11-11 09:31:53 -06:00
kdb_io.c kdb: Const qualifier for kdb_getstr's prompt argument 2015-02-19 12:39:03 -06:00
kdb_keyboard.c KDB: Fix usability issues relating to the 'enter' key. 2012-03-22 15:07:15 -05:00
kdb_main.c module: use a structure to encapsulate layout. 2015-12-04 22:46:25 +01:00
kdb_private.h kdb: Const qualifier for kdb_getstr's prompt argument 2015-02-19 12:39:03 -06:00
kdb_support.c kdb: remove the second argument of k[un]map_atomic() 2012-03-20 21:48:26 +08:00