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authorSami Tolvanen <samitolvanen@google.com>2020-09-25 16:43:53 -0700
committerKees Cook <keescook@chromium.org>2021-02-23 12:46:57 -0800
commit22c8542d7b220ffc53816d47b371b1fe34341d4a (patch)
tree55e578bad8de1fb1142b4f4f694a33ab5485dcfe /kernel
parent0e731dbc18241d68318e0a7d2c2c0087c9073fb9 (diff)
downloadlinux-22c8542d7b220ffc53816d47b371b1fe34341d4a.tar.gz
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 'kernel')
-rw-r--r--kernel/trace/Kconfig13
1 files changed, 13 insertions, 0 deletions
diff --git a/kernel/trace/Kconfig b/kernel/trace/Kconfig
index 3985a31a49b7..936ccab1b938 100644
--- a/kernel/trace/Kconfig
+++ b/kernel/trace/Kconfig
@@ -60,6 +60,11 @@ config HAVE_NOP_MCOUNT
help
Arch supports the gcc options -pg with -mrecord-mcount and -nop-mcount
+config HAVE_OBJTOOL_MCOUNT
+ bool
+ help
+ Arch supports objtool --mcount
+
config HAVE_C_RECORDMCOUNT
bool
help
@@ -612,10 +617,18 @@ config FTRACE_MCOUNT_USE_CC
depends on !FTRACE_MCOUNT_USE_PATCHABLE_FUNCTION_ENTRY
depends on FTRACE_MCOUNT_RECORD
+config FTRACE_MCOUNT_USE_OBJTOOL
+ def_bool y
+ depends on HAVE_OBJTOOL_MCOUNT
+ depends on !FTRACE_MCOUNT_USE_PATCHABLE_FUNCTION_ENTRY
+ depends on !FTRACE_MCOUNT_USE_CC
+ depends on FTRACE_MCOUNT_RECORD
+
config FTRACE_MCOUNT_USE_RECORDMCOUNT
def_bool y
depends on !FTRACE_MCOUNT_USE_PATCHABLE_FUNCTION_ENTRY
depends on !FTRACE_MCOUNT_USE_CC
+ depends on !FTRACE_MCOUNT_USE_OBJTOOL
depends on FTRACE_MCOUNT_RECORD
config TRACING_MAP