diff options
| author | Arvind Sankar <nivedita@alum.mit.edu> | 2020-01-03 12:39:48 +0100 |
|---|---|---|
| committer | Ingo Molnar <mingo@kernel.org> | 2020-01-10 18:55:04 +0100 |
| commit | 14b864f4b5c402fe1ca394042beeea6fdf54f8f5 (patch) | |
| tree | 9d5a3b3acd34f3eb4e84b7739cf1b8810129dd9c /arch/x86/boot/compressed | |
| parent | 4684abe375927e745974bfddd85e171a3eb887a5 (diff) | |
efi/x86: Check number of arguments to variadic functions
On x86 we need to thunk through assembler stubs to call the EFI services
for mixed mode, and for runtime services in 64-bit mode. The assembler
stubs have limits on how many arguments it handles. Introduce a few
macros to check that we do not try to pass too many arguments to the
stubs.
Signed-off-by: Arvind Sankar <nivedita@alum.mit.edu>
Signed-off-by: Ard Biesheuvel <ardb@kernel.org>
Cc: Andy Lutomirski <luto@kernel.org>
Cc: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Cc: Matthew Garrett <mjg59@google.com>
Cc: linux-efi@vger.kernel.org
Link: https://lkml.kernel.org/r/20200103113953.9571-16-ardb@kernel.org
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'arch/x86/boot/compressed')
| -rw-r--r-- | arch/x86/boot/compressed/efi_thunk_64.S | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/arch/x86/boot/compressed/efi_thunk_64.S b/arch/x86/boot/compressed/efi_thunk_64.S index 6d95eb6b8912..d040ff5458e5 100644 --- a/arch/x86/boot/compressed/efi_thunk_64.S +++ b/arch/x86/boot/compressed/efi_thunk_64.S @@ -23,7 +23,7 @@ .code64 .text -SYM_FUNC_START(efi64_thunk) +SYM_FUNC_START(__efi64_thunk) push %rbp push %rbx @@ -95,7 +95,7 @@ SYM_FUNC_START(efi64_thunk) pop %rbx pop %rbp ret -SYM_FUNC_END(efi64_thunk) +SYM_FUNC_END(__efi64_thunk) .code32 /* |