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| author | Sami Tolvanen <samitolvanen@google.com> | 2020-09-25 16:43:53 -0700 |
|---|---|---|
| committer | Kees Cook <keescook@chromium.org> | 2021-02-23 12:46:57 -0800 |
| commit | 22c8542d7b220ffc53816d47b371b1fe34341d4a (patch) | |
| tree | 55e578bad8de1fb1142b4f4f694a33ab5485dcfe /Makefile | |
| parent | 0e731dbc18241d68318e0a7d2c2c0087c9073fb9 (diff) | |
| download | lwn-22c8542d7b220ffc53816d47b371b1fe34341d4a.tar.gz lwn-22c8542d7b220ffc53816d47b371b1fe34341d4a.zip | |
tracing: add support for objtool mcount
This change adds build support for using objtool to generate
__mcount_loc sections.
Signed-off-by: Sami Tolvanen <samitolvanen@google.com>
Diffstat (limited to 'Makefile')
| -rw-r--r-- | Makefile | 7 |
1 files changed, 7 insertions, 0 deletions
@@ -860,6 +860,9 @@ ifdef CONFIG_FTRACE_MCOUNT_USE_CC endif endif endif +ifdef CONFIG_FTRACE_MCOUNT_USE_OBJTOOL + CC_FLAGS_USING += -DCC_USING_NOP_MCOUNT +endif ifdef CONFIG_FTRACE_MCOUNT_USE_RECORDMCOUNT ifdef CONFIG_HAVE_C_RECORDMCOUNT BUILD_C_RECORDMCOUNT := y @@ -1236,6 +1239,10 @@ uapi-asm-generic: PHONY += prepare-objtool prepare-resolve_btfids prepare-objtool: $(objtool_target) ifeq ($(SKIP_STACK_VALIDATION),1) +ifdef CONFIG_FTRACE_MCOUNT_USE_OBJTOOL + @echo "error: Cannot generate __mcount_loc for CONFIG_DYNAMIC_FTRACE=y, please install libelf-dev, libelf-devel or elfutils-libelf-devel" >&2 + @false +endif ifdef CONFIG_UNWINDER_ORC @echo "error: Cannot generate ORC metadata for CONFIG_UNWINDER_ORC=y, please install libelf-dev, libelf-devel or elfutils-libelf-devel" >&2 @false |