linux/arch/powerpc/include/asm/kasan.h

/* SPDX-License-Identifier: GPL-2.0 */
#ifndef __ASM_KASAN_H
#define __ASM_KASAN_H

#ifdef CONFIG_KASAN
#define _GLOBAL_KASAN(fn)	_GLOBAL(__##fn)
#define _GLOBAL_TOC_KASAN(fn)	_GLOBAL_TOC(__##fn)
#define EXPORT_SYMBOL_KASAN(fn)	EXPORT_SYMBOL(__##fn)
#else
#define _GLOBAL_KASAN(fn)	_GLOBAL(fn)
#define _GLOBAL_TOC_KASAN(fn)	_GLOBAL_TOC(fn)
#define EXPORT_SYMBOL_KASAN(fn)
#endif

#endif
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> 2019-04-26 16:23:26 +00:00			`/* SPDX-License-Identifier: GPL-2.0 */`
			`#ifndef __ASM_KASAN_H`
			`#define __ASM_KASAN_H`

			`#ifdef CONFIG_KASAN`
			`#define _GLOBAL_KASAN(fn) _GLOBAL(__##fn)`
			`#define _GLOBAL_TOC_KASAN(fn) _GLOBAL_TOC(__##fn)`
			`#define EXPORT_SYMBOL_KASAN(fn) EXPORT_SYMBOL(__##fn)`
			`#else`
			`#define _GLOBAL_KASAN(fn) _GLOBAL(fn)`
			`#define _GLOBAL_TOC_KASAN(fn) _GLOBAL_TOC(fn)`
			`#define EXPORT_SYMBOL_KASAN(fn)`
			`#endif`

			`#endif`