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author | Russell King <rmk+kernel@armlinux.org.uk> | 2020-12-21 11:19:24 +0000 |
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committer | Russell King <rmk+kernel@armlinux.org.uk> | 2020-12-21 11:19:24 +0000 |
commit | 8cc9251737d1883e33fd0a7dafbd4062916c1ca6 (patch) | |
tree | 6a1901ccbce167330049ce9b2afced122b325c4a /arch/arm/boot/compressed/string.c | |
parent | e64ab473dddaffdfc4bd0b385204f472f2cb00d6 (diff) | |
parent | 10fce53c0ef8f6e79115c3d9e0d7ea1338c3fa37 (diff) |
Merge branches 'fixes' and 'misc' into for-next
Diffstat (limited to 'arch/arm/boot/compressed/string.c')
-rw-r--r-- | arch/arm/boot/compressed/string.c | 19 |
1 files changed, 19 insertions, 0 deletions
diff --git a/arch/arm/boot/compressed/string.c b/arch/arm/boot/compressed/string.c index ade5079bebbf..8c0fa276d994 100644 --- a/arch/arm/boot/compressed/string.c +++ b/arch/arm/boot/compressed/string.c @@ -7,6 +7,25 @@ #include <linux/string.h> +/* + * The decompressor is built without KASan but uses the same redirects as the + * rest of the kernel when CONFIG_KASAN is enabled, defining e.g. memcpy() + * to __memcpy() but since we are not linking with the main kernel string + * library in the decompressor, that will lead to link failures. + * + * Undefine KASan's versions, define the wrapped functions and alias them to + * the right names so that when e.g. __memcpy() appear in the code, it will + * still be linked to this local version of memcpy(). + */ +#ifdef CONFIG_KASAN +#undef memcpy +#undef memmove +#undef memset +void *__memcpy(void *__dest, __const void *__src, size_t __n) __alias(memcpy); +void *__memmove(void *__dest, __const void *__src, size_t count) __alias(memmove); +void *__memset(void *s, int c, size_t count) __alias(memset); +#endif + void *memcpy(void *__dest, __const void *__src, size_t __n) { int i = 0; |