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| author | Christophe Leroy <christophe.leroy@c-s.fr> | 2019-04-26 18:23:26 +0200 |
|---|---|---|
| committer | Michael Ellerman <mpe@ellerman.id.au> | 2019-05-02 17:20:25 +0200 |
| commit | 26deb04342e343ac58ab05bc7d2345ff0be9b667 (patch) | |
| tree | 39040b7c409757661ecd6c7d82dce9e919072625 /tools | |
| parent | powerpc/32: Move early_init() in a separate file (diff) | |
| download | linux-26deb04342e343ac58ab05bc7d2345ff0be9b667.tar.xz linux-26deb04342e343ac58ab05bc7d2345ff0be9b667.zip | |
powerpc: prepare string/mem functions for KASAN
CONFIG_KASAN implements wrappers for memcpy() memmove() and memset()
Those wrappers are doing the verification then call respectively
__memcpy() __memmove() and __memset(). The arches are therefore
expected to rename their optimised functions that way.
For files on which KASAN is inhibited, #defines are used to allow
them to directly call optimised versions of the functions without
going through the KASAN wrappers.
See commit 393f203f5fd5 ("x86_64: kasan: add interceptors for
memset/memmove/memcpy functions") for details.
Other string / mem functions do not (yet) have kasan wrappers,
we therefore have to fallback to the generic versions when
KASAN is active, otherwise KASAN checks will be skipped.
Signed-off-by: Christophe Leroy <christophe.leroy@c-s.fr>
[mpe: Fixups to keep selftests working]
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Diffstat (limited to 'tools')
| -rw-r--r-- | tools/testing/selftests/powerpc/copyloops/asm/export.h | 1 | ||||
| -rw-r--r-- | tools/testing/selftests/powerpc/copyloops/asm/kasan.h | 0 | ||||
| -rw-r--r-- | tools/testing/selftests/powerpc/copyloops/asm/ppc_asm.h | 1 |
3 files changed, 2 insertions, 0 deletions
diff --git a/tools/testing/selftests/powerpc/copyloops/asm/export.h b/tools/testing/selftests/powerpc/copyloops/asm/export.h index 0bab35f6777a..05c1663c89b0 100644 --- a/tools/testing/selftests/powerpc/copyloops/asm/export.h +++ b/tools/testing/selftests/powerpc/copyloops/asm/export.h @@ -1,2 +1,3 @@ /* SPDX-License-Identifier: GPL-2.0 */ #define EXPORT_SYMBOL(x) +#define EXPORT_SYMBOL_KASAN(x) diff --git a/tools/testing/selftests/powerpc/copyloops/asm/kasan.h b/tools/testing/selftests/powerpc/copyloops/asm/kasan.h new file mode 100644 index 000000000000..e69de29bb2d1 --- /dev/null +++ b/tools/testing/selftests/powerpc/copyloops/asm/kasan.h diff --git a/tools/testing/selftests/powerpc/copyloops/asm/ppc_asm.h b/tools/testing/selftests/powerpc/copyloops/asm/ppc_asm.h index 0605df807593..58c1cef3e399 100644 --- a/tools/testing/selftests/powerpc/copyloops/asm/ppc_asm.h +++ b/tools/testing/selftests/powerpc/copyloops/asm/ppc_asm.h @@ -25,6 +25,7 @@ #define _GLOBAL(A) FUNC_START(test_ ## A) #define _GLOBAL_TOC(A) _GLOBAL(A) +#define _GLOBAL_TOC_KASAN(A) _GLOBAL(A) #define PPC_MTOCRF(A, B) mtocrf A, B |