diff options
| author | Sami Tolvanen <samitolvanen@google.com> | 2022-09-09 00:54:46 +0300 |
|---|---|---|
| committer | Kees Cook <keescook@chromium.org> | 2022-09-26 20:13:13 +0300 |
| commit | 92efda8eb15295a07f450828b2db14485bfc09c2 (patch) | |
| tree | 5b40af87a5edb0d64cd7b0e24599a2dce6f64e98 /include/linux/cfi.h | |
| parent | 9fca7115827b2e5f48d84e50bceb4edfd4cb6375 (diff) | |
| download | linux-92efda8eb15295a07f450828b2db14485bfc09c2.tar.xz | |
cfi: Drop __CFI_ADDRESSABLE
The __CFI_ADDRESSABLE macro is used for init_module and cleanup_module
to ensure we have the address of the CFI jump table, and with
CONFIG_X86_KERNEL_IBT to ensure LTO won't optimize away the symbols.
As __CFI_ADDRESSABLE is no longer necessary with -fsanitize=kcfi, add
a more flexible version of the __ADDRESSABLE macro and always ensure
these symbols won't be dropped.
Signed-off-by: Sami Tolvanen <samitolvanen@google.com>
Reviewed-by: Kees Cook <keescook@chromium.org>
Tested-by: Kees Cook <keescook@chromium.org>
Tested-by: Nathan Chancellor <nathan@kernel.org>
Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Tested-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Signed-off-by: Kees Cook <keescook@chromium.org>
Link: https://lore.kernel.org/r/20220908215504.3686827-5-samitolvanen@google.com
Diffstat (limited to 'include/linux/cfi.h')
| -rw-r--r-- | include/linux/cfi.h | 20 |
1 files changed, 0 insertions, 20 deletions
diff --git a/include/linux/cfi.h b/include/linux/cfi.h index 4ab51c067007..2cdbc0fbd0ab 100644 --- a/include/linux/cfi.h +++ b/include/linux/cfi.h @@ -13,26 +13,6 @@ typedef void (*cfi_check_fn)(uint64_t id, void *ptr, void *diag); /* Compiler-generated function in each module, and the kernel */ extern void __cfi_check(uint64_t id, void *ptr, void *diag); -/* - * Force the compiler to generate a CFI jump table entry for a function - * and store the jump table address to __cfi_jt_<function>. - */ -#define __CFI_ADDRESSABLE(fn, __attr) \ - const void *__cfi_jt_ ## fn __visible __attr = (void *)&fn - -#else /* !CONFIG_CFI_CLANG */ - -#ifdef CONFIG_X86_KERNEL_IBT - -#define __CFI_ADDRESSABLE(fn, __attr) \ - const void *__cfi_jt_ ## fn __visible __attr = (void *)&fn - -#endif /* CONFIG_X86_KERNEL_IBT */ - #endif /* CONFIG_CFI_CLANG */ -#ifndef __CFI_ADDRESSABLE -#define __CFI_ADDRESSABLE(fn, __attr) -#endif - #endif /* _LINUX_CFI_H */ |