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Diffstat (limited to 'Documentation/dev-tools/ubsan.rst')
| -rw-r--r-- | Documentation/dev-tools/ubsan.rst | 28 |
1 files changed, 8 insertions, 20 deletions
diff --git a/Documentation/dev-tools/ubsan.rst b/Documentation/dev-tools/ubsan.rst index 2de7c63415da0..e3591f8e9d5b4 100644 --- a/Documentation/dev-tools/ubsan.rst +++ b/Documentation/dev-tools/ubsan.rst @@ -49,34 +49,22 @@ Report example Usage ----- -To enable UBSAN configure kernel with:: +To enable UBSAN, configure the kernel with:: - CONFIG_UBSAN=y + CONFIG_UBSAN=y -and to check the entire kernel:: - - CONFIG_UBSAN_SANITIZE_ALL=y - -To enable instrumentation for specific files or directories, add a line -similar to the following to the respective kernel Makefile: - -- For a single file (e.g. main.o):: - - UBSAN_SANITIZE_main.o := y - -- For all files in one directory:: - - UBSAN_SANITIZE := y - -To exclude files from being instrumented even if -``CONFIG_UBSAN_SANITIZE_ALL=y``, use:: +To exclude files from being instrumented use:: UBSAN_SANITIZE_main.o := n -and:: +and to exclude all targets in one directory use:: UBSAN_SANITIZE := n +When disabled for all targets, specific files can be enabled using:: + + UBSAN_SANITIZE_main.o := y + Detection of unaligned accesses controlled through the separate option - CONFIG_UBSAN_ALIGNMENT. It's off by default on architectures that support unaligned accesses (CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS=y). One could |