[PATCH v5 03/29] objtool: Don't autodetect vmlinux.o

Sami Tolvanen
2020-10-09T16:14:37Z

With LTO, we run objtool on vmlinux.o, but don't want noinstr
validation. This change requires --vmlinux to be passed to objtool
explicitly.

Suggested-by: Peter Zijlstra <peterz@infradead.org>
Signed-off-by: Sami Tolvanen <samitolvanen@google.com>
Reviewed-by: Kees Cook <keescook@chromium.org>
---
scripts/link-vmlinux.sh | 2 +-
tools/objtool/builtin-check.c | 6 +-----
2 files changed, 2 insertions(+), 6 deletions(-)

diff --git a/scripts/link-vmlinux.sh b/scripts/link-vmlinux.sh
index e6e2d9e5ff48..372c3719f94c 100755
--- a/scripts/link-vmlinux.sh
+++ b/scripts/link-vmlinux.sh
@@ -64,7 +64,7 @@ objtool_link()
local objtoolopt;

if [ -n "${CONFIG_VMLINUX_VALIDATION}" ]; then
- objtoolopt="check"
+ objtoolopt="check --vmlinux"
if [ -z "${CONFIG_FRAME_POINTER}" ]; then
objtoolopt="${objtoolopt} --no-fp"
fi
diff --git a/tools/objtool/builtin-check.c b/tools/objtool/builtin-check.c
index 6518c1a6ad1e..ff4d7f5c0e80 100644
--- a/tools/objtool/builtin-check.c
+++ b/tools/objtool/builtin-check.c
@@ -41,7 +41,7 @@ const struct option check_options[] = {

int cmd_check(int argc, const char **argv)
{
- const char *objname, *s;
+ const char *objname;
struct objtool_file *file;
int ret;

@@ -52,10 +52,6 @@ int cmd_check(int argc, const char **argv)

objname = argv[0];

- s = strstr(objname, "vmlinux.o");
- if (s && !s[9])
- vmlinux = true;
-
file = objtool_open_read(objname);
if (!file)
return 1;
--
2.28.0.1011.ga647a8990f-goog