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| author | Christophe Leroy <christophe.leroy@c-s.fr> | 2019-04-26 19:23:26 +0300 |
|---|---|---|
| committer | Michael Ellerman <mpe@ellerman.id.au> | 2019-05-02 18:20:25 +0300 |
| commit | 26deb04342e343ac58ab05bc7d2345ff0be9b667 (patch) | |
| tree | 39040b7c409757661ecd6c7d82dce9e919072625 /arch/powerpc/kernel/prom_init_check.sh | |
| parent | d69ca6bab39e84a84781535b977c7e62c8f84d37 (diff) | |
| download | linux-26deb04342e343ac58ab05bc7d2345ff0be9b667.tar.xz | |
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 'arch/powerpc/kernel/prom_init_check.sh')
| -rw-r--r-- | arch/powerpc/kernel/prom_init_check.sh | 10 |
1 files changed, 9 insertions, 1 deletions
diff --git a/arch/powerpc/kernel/prom_init_check.sh b/arch/powerpc/kernel/prom_init_check.sh index 667df97d2595..181fd10008ef 100644 --- a/arch/powerpc/kernel/prom_init_check.sh +++ b/arch/powerpc/kernel/prom_init_check.sh @@ -16,8 +16,16 @@ # If you really need to reference something from prom_init.o add # it to the list below: +grep "^CONFIG_KASAN=y$" .config >/dev/null +if [ $? -eq 0 ] +then + MEM_FUNCS="__memcpy __memset" +else + MEM_FUNCS="memcpy memset" +fi + WHITELIST="add_reloc_offset __bss_start __bss_stop copy_and_flush -_end enter_prom memcpy memset reloc_offset __secondary_hold +_end enter_prom $MEM_FUNCS reloc_offset __secondary_hold __secondary_hold_acknowledge __secondary_hold_spinloop __start strcmp strcpy strlcpy strlen strncmp strstr kstrtobool logo_linux_clut224 reloc_got2 kernstart_addr memstart_addr linux_banner _stext |