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| author | Sami Tolvanen <samitolvanen@google.com> | 2020-12-11 10:46:18 -0800 |
|---|---|---|
| committer | Kees Cook <keescook@chromium.org> | 2021-01-08 15:59:02 -0800 |
| commit | 3b15cdc15956673ba1551d79bceae471436ac6a9 (patch) | |
| tree | 5dc22bbb44d06225d4014bf7dadb1e3cfd5ec678 /Makefile | |
| parent | e71ba9452f0b5b2e8dc8aa5445198cd9214a6a62 (diff) | |
| download | linux-stable-3b15cdc15956673ba1551d79bceae471436ac6a9.tar.gz linux-stable-3b15cdc15956673ba1551d79bceae471436ac6a9.tar.bz2 linux-stable-3b15cdc15956673ba1551d79bceae471436ac6a9.zip | |
tracing: move function tracer options to Kconfig
Move function tracer options to Kconfig to make it easier to add
new methods for generating __mcount_loc, and to make the options
available also when building kernel modules.
Note that FTRACE_MCOUNT_USE_* options are updated on rebuild and
therefore, work even if the .config was generated in a different
environment.
Signed-off-by: Sami Tolvanen <samitolvanen@google.com>
Acked-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
Signed-off-by: Kees Cook <keescook@chromium.org>
Link: https://lore.kernel.org/r/20201211184633.3213045-2-samitolvanen@google.com
Diffstat (limited to 'Makefile')
| -rw-r--r-- | Makefile | 20 |
1 files changed, 8 insertions, 12 deletions
@@ -851,12 +851,8 @@ KBUILD_CFLAGS += $(DEBUG_CFLAGS) export DEBUG_CFLAGS ifdef CONFIG_FUNCTION_TRACER -ifdef CONFIG_FTRACE_MCOUNT_RECORD - # gcc 5 supports generating the mcount tables directly - ifeq ($(call cc-option-yn,-mrecord-mcount),y) - CC_FLAGS_FTRACE += -mrecord-mcount - export CC_USING_RECORD_MCOUNT := 1 - endif +ifdef CONFIG_FTRACE_MCOUNT_USE_CC + CC_FLAGS_FTRACE += -mrecord-mcount ifdef CONFIG_HAVE_NOP_MCOUNT ifeq ($(call cc-option-yn, -mnop-mcount),y) CC_FLAGS_FTRACE += -mnop-mcount @@ -864,6 +860,12 @@ ifdef CONFIG_FTRACE_MCOUNT_RECORD endif endif endif +ifdef CONFIG_FTRACE_MCOUNT_USE_RECORDMCOUNT + ifdef CONFIG_HAVE_C_RECORDMCOUNT + BUILD_C_RECORDMCOUNT := y + export BUILD_C_RECORDMCOUNT + endif +endif ifdef CONFIG_HAVE_FENTRY ifeq ($(call cc-option-yn, -mfentry),y) CC_FLAGS_FTRACE += -mfentry @@ -873,12 +875,6 @@ endif export CC_FLAGS_FTRACE KBUILD_CFLAGS += $(CC_FLAGS_FTRACE) $(CC_FLAGS_USING) KBUILD_AFLAGS += $(CC_FLAGS_USING) -ifdef CONFIG_DYNAMIC_FTRACE - ifdef CONFIG_HAVE_C_RECORDMCOUNT - BUILD_C_RECORDMCOUNT := y - export BUILD_C_RECORDMCOUNT - endif -endif endif # We trigger additional mismatches with less inlining |