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authorJosh Poimboeuf <jpoimboe@redhat.com>2022-04-18 19:50:36 +0300
committerPeter Zijlstra <peterz@infradead.org>2022-04-22 13:32:03 +0300
commit03f16cd020eb8bb2eb837e2090086f296a9fa91d (patch)
tree7fea369cfc86508e8c7d3742c85e80ffe33478db /scripts/link-vmlinux.sh
parentc2bdd61c98d915ad2cc1f8cd4661fcda1f1e4c16 (diff)
downloadlinux-03f16cd020eb8bb2eb837e2090086f296a9fa91d.tar.xz
objtool: Add CONFIG_OBJTOOL
Now that stack validation is an optional feature of objtool, add CONFIG_OBJTOOL and replace most usages of CONFIG_STACK_VALIDATION with it. CONFIG_STACK_VALIDATION can now be considered to be frame-pointer specific. CONFIG_UNWINDER_ORC is already inherently valid for live patching, so no need to "validate" it. Signed-off-by: Josh Poimboeuf <jpoimboe@redhat.com> Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org> Reviewed-by: Miroslav Benes <mbenes@suse.cz> Link: https://lkml.kernel.org/r/939bf3d85604b2a126412bf11af6e3bd3b872bcb.1650300597.git.jpoimboe@redhat.com
Diffstat (limited to 'scripts/link-vmlinux.sh')
-rwxr-xr-xscripts/link-vmlinux.sh32
1 files changed, 18 insertions, 14 deletions
diff --git a/scripts/link-vmlinux.sh b/scripts/link-vmlinux.sh
index 0140bfa32c0c..5101a7fbfaaf 100755
--- a/scripts/link-vmlinux.sh
+++ b/scripts/link-vmlinux.sh
@@ -108,8 +108,11 @@ objtool_link()
local objtoolcmd;
local objtoolopt;
- if is_enabled CONFIG_STACK_VALIDATION && \
- ( is_enabled CONFIG_LTO_CLANG || is_enabled CONFIG_X86_KERNEL_IBT ); then
+ if ! is_enabled CONFIG_OBJTOOL; then
+ return;
+ fi
+
+ if is_enabled CONFIG_LTO_CLANG || is_enabled CONFIG_X86_KERNEL_IBT; then
# Don't perform vmlinux validation unless explicitly requested,
# but run objtool on vmlinux.o now that we have an object file.
@@ -126,10 +129,23 @@ objtool_link()
objtoolopt="${objtoolopt} --orc"
fi
+ if is_enabled CONFIG_RETPOLINE; then
+ objtoolopt="${objtoolopt} --retpoline"
+ fi
+
+ if is_enabled CONFIG_SLS; then
+ objtoolopt="${objtoolopt} --sls"
+ fi
+
if is_enabled CONFIG_STACK_VALIDATION; then
objtoolopt="${objtoolopt} --stackval"
fi
+ if is_enabled CONFIG_X86_SMAP; then
+ objtoolopt="${objtoolopt} --uaccess"
+ fi
+
+
objtoolopt="${objtoolopt} --lto"
fi
@@ -139,18 +155,6 @@ objtool_link()
if [ -n "${objtoolopt}" ]; then
- if is_enabled CONFIG_RETPOLINE; then
- objtoolopt="${objtoolopt} --retpoline"
- fi
-
- if is_enabled CONFIG_SLS; then
- objtoolopt="${objtoolopt} --sls"
- fi
-
- if is_enabled CONFIG_X86_SMAP; then
- objtoolopt="${objtoolopt} --uaccess"
- fi
-
if ! is_enabled CONFIG_FRAME_POINTER; then
objtoolopt="${objtoolopt} --no-fp"
fi