diff options
author | Christophe Leroy <christophe.leroy@csgroup.eu> | 2022-02-15 15:41:02 +0300 |
---|---|---|
committer | Michael Ellerman <mpe@ellerman.id.au> | 2022-02-16 15:25:11 +0300 |
commit | a257cacc38718c83cee003487e03197f237f5c3f (patch) | |
tree | a960674ea9bbc43410157051a44a391c3b767b39 /include/linux/kallsyms.h | |
parent | 41a88b45479da873bfc5d29ba1a545a780c5329a (diff) | |
download | linux-a257cacc38718c83cee003487e03197f237f5c3f.tar.xz |
asm-generic: Define CONFIG_HAVE_FUNCTION_DESCRIPTORS
Replace HAVE_DEREFERENCE_FUNCTION_DESCRIPTOR by a config option
named CONFIG_HAVE_FUNCTION_DESCRIPTORS and use it instead of
'dereference_function_descriptor' macro to know whether an
arch has function descriptors.
To limit churn in one of the following patches, use
an #ifdef/#else construct with empty first part
instead of an #ifndef in asm-generic/sections.h
On powerpc, make sure the config option matches the ABI used
by the compiler with a BUILD_BUG_ON() and add missing _CALL_ELF=2
when calling 'sparse' so that sparse sees the same piece of
code as GCC.
And include a helper to check whether an arch has function
descriptors or not : have_function_descriptors()
Signed-off-by: Christophe Leroy <christophe.leroy@csgroup.eu>
Reviewed-by: Kees Cook <keescook@chromium.org>
Reviewed-by: Nicholas Piggin <npiggin@gmail.com>
Acked-by: Helge Deller <deller@gmx.de>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/4a0f11fb0ea74a3197bc44dd7ba25e53a24fd03d.1644928018.git.christophe.leroy@csgroup.eu
Diffstat (limited to 'include/linux/kallsyms.h')
-rw-r--r-- | include/linux/kallsyms.h | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/include/linux/kallsyms.h b/include/linux/kallsyms.h index 4176c7eca7b5..ce1bd2fbf23e 100644 --- a/include/linux/kallsyms.h +++ b/include/linux/kallsyms.h @@ -48,7 +48,7 @@ static inline int is_ksym_addr(unsigned long addr) static inline void *dereference_symbol_descriptor(void *ptr) { -#ifdef HAVE_DEREFERENCE_FUNCTION_DESCRIPTOR +#ifdef CONFIG_HAVE_FUNCTION_DESCRIPTORS struct module *mod; ptr = dereference_kernel_function_descriptor(ptr); |