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| author | Masahiro Yamada <masahiroy@kernel.org> | 2024-06-12 14:02:55 +0900 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2024-08-03 08:53:21 +0200 |
| commit | c8cae1c194268bb20709a91318c304cf4655de2f (patch) | |
| tree | b8c1bdba6bbb64828018b35422f8e47a0cffba26 /scripts | |
| parent | 23a19655fb56f241e592041156dfb1c6d04da644 (diff) | |
| download | linux-c8cae1c194268bb20709a91318c304cf4655de2f.tar.gz linux-c8cae1c194268bb20709a91318c304cf4655de2f.tar.bz2 linux-c8cae1c194268bb20709a91318c304cf4655de2f.zip | |
x86/kconfig: Add as-instr64 macro to properly evaluate AS_WRUSS
[ Upstream commit 469169803d52a5d8f0dc781090638e851a7d22b1 ]
Some instructions are only available on the 64-bit architecture.
Bi-arch compilers that default to -m32 need the explicit -m64 option
to evaluate them properly.
Fixes: 18e66b695e78 ("x86/shstk: Add Kconfig option for shadow stack")
Closes: https://lore.kernel.org/all/20240612-as-instr-opt-wrussq-v2-1-bd950f7eead7@gmail.com/
Reported-by: Dmitry Safonov <0x7f454c46@gmail.com>
Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
Signed-off-by: Borislav Petkov (AMD) <bp@alien8.de>
Tested-by: Dmitry Safonov <0x7f454c46@gmail.com>
Link: https://lore.kernel.org/r/20240612050257.3670768-1-masahiroy@kernel.org
Signed-off-by: Sasha Levin <sashal@kernel.org>
Diffstat (limited to 'scripts')
| -rw-r--r-- | scripts/Kconfig.include | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/scripts/Kconfig.include b/scripts/Kconfig.include index 3ee8ecfb8c04..3500a3d62f0d 100644 --- a/scripts/Kconfig.include +++ b/scripts/Kconfig.include @@ -33,7 +33,8 @@ ld-option = $(success,$(LD) -v $(1)) # $(as-instr,<instr>) # Return y if the assembler supports <instr>, n otherwise -as-instr = $(success,printf "%b\n" "$(1)" | $(CC) $(CLANG_FLAGS) -Wa$(comma)--fatal-warnings -c -x assembler-with-cpp -o /dev/null -) +as-instr = $(success,printf "%b\n" "$(1)" | $(CC) $(CLANG_FLAGS) $(2) -Wa$(comma)--fatal-warnings -c -x assembler-with-cpp -o /dev/null -) +as-instr64 = $(as-instr,$(1),$(m64-flag)) # check if $(CC) and $(LD) exist $(error-if,$(failure,command -v $(CC)),C compiler '$(CC)' not found) |