linux/arch/x86/vdso
Andrey Ryabinin ef7f0d6a6c x86_64: add KASan support
This patch adds arch specific code for kernel address sanitizer.

16TB of virtual addressed used for shadow memory.  It's located in range
[ffffec0000000000 - fffffc0000000000] between vmemmap and %esp fixup
stacks.

At early stage we map whole shadow region with zero page.  Latter, after
pages mapped to direct mapping address range we unmap zero pages from
corresponding shadow (see kasan_map_shadow()) and allocate and map a real
shadow memory reusing vmemmap_populate() function.

Also replace __pa with __pa_nodebug before shadow initialized.  __pa with
CONFIG_DEBUG_VIRTUAL=y make external function call (__phys_addr)
__phys_addr is instrumented, so __asan_load could be called before shadow
area initialized.

Signed-off-by: Andrey Ryabinin <a.ryabinin@samsung.com>
Cc: Dmitry Vyukov <dvyukov@google.com>
Cc: Konstantin Serebryany <kcc@google.com>
Cc: Dmitry Chernenkov <dmitryc@google.com>
Signed-off-by: Andrey Konovalov <adech.fo@gmail.com>
Cc: Yuri Gribov <tetra2005@gmail.com>
Cc: Konstantin Khlebnikov <koct9i@gmail.com>
Cc: Sasha Levin <sasha.levin@oracle.com>
Cc: Christoph Lameter <cl@linux.com>
Cc: Joonsoo Kim <iamjoonsoo.kim@lge.com>
Cc: Dave Hansen <dave.hansen@intel.com>
Cc: Andi Kleen <andi@firstfloor.org>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: "H. Peter Anvin" <hpa@zytor.com>
Cc: Christoph Lameter <cl@linux.com>
Cc: Pekka Enberg <penberg@kernel.org>
Cc: David Rientjes <rientjes@google.com>
Cc: Jim Davis <jim.epost@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2015-02-13 21:21:41 -08:00
..
vdso32 x86/vdso: Improve the fake section headers 2014-06-19 15:45:12 -07:00
.gitignore x86, vdso: Reimplement vdso.so preparation in build-time C 2014-05-05 13:18:51 -07:00
checkundef.sh x86, vdso: Don't quote $nm in the script for checking vdso references 2010-07-27 23:52:29 -07:00
Makefile x86_64: add KASan support 2015-02-13 21:21:41 -08:00
vclock_gettime.c x86/vdso: Move DISABLE_BRANCH_PROFILING into the vdso makefile 2014-06-24 13:53:00 -07:00
vdso-layout.lds.S x86, vdso: Move the vvar area before the vdso text 2014-07-11 16:57:51 -07:00
vdso-note.S
vdso.lds.S x86/vdso: Improve the fake section headers 2014-06-19 15:45:12 -07:00
vdso2c.c x86, vdso: Get rid of the fake section mechanism 2014-07-11 16:58:07 -07:00
vdso2c.h x86/vdso: Fix vdso2c's special_pages[] error checking 2014-09-24 09:55:38 +02:00
vdso32-setup.c arm64,ia64,ppc,s390,sh,tile,um,x86,mm: remove default gate area 2014-08-08 15:57:27 -07:00
vdsox32.lds.S x86/vdso: Improve the fake section headers 2014-06-19 15:45:12 -07:00
vgetcpu.c x86,vdso: Use LSL unconditionally for vgetcpu 2014-11-03 13:41:53 +01:00
vma.c x86_64, vdso: Fix the vdso address randomization algorithm 2014-12-20 16:56:57 -08:00