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authorJosh Poimboeuf <jpoimboe@redhat.com>2021-09-14 17:41:13 +0300
committerSteven Rostedt (VMware) <rostedt@goodmis.org>2021-10-01 04:24:07 +0300
commite028c4f7ac7ca8c96126fe46c54ab3d56ffe6a66 (patch)
treef5236cbdb942817366baaeceb33ad2448ae1783c /tools
parent03bac0df2886882c43e6d0bfff9dee84a184fc7e (diff)
downloadlinux-e028c4f7ac7ca8c96126fe46c54ab3d56ffe6a66.tar.xz
objtool: Add frame-pointer-specific function ignore
Add a CONFIG_FRAME_POINTER-specific version of STACK_FRAME_NON_STANDARD() for the case where a function is intentionally missing frame pointer setup, but otherwise needs objtool/ORC coverage when frame pointers are disabled. Link: https://lkml.kernel.org/r/163163047364.489837.17377799909553689661.stgit@devnote2 Signed-off-by: Josh Poimboeuf <jpoimboe@redhat.com> Reviewed-by: Masami Hiramatsu <mhiramat@kernel.org> Tested-by: Masami Hiramatsu <mhiramat@kernel.org> Signed-off-by: Masami Hiramatsu <mhiramat@kernel.org> Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
Diffstat (limited to 'tools')
-rw-r--r--tools/include/linux/objtool.h12
1 files changed, 12 insertions, 0 deletions
diff --git a/tools/include/linux/objtool.h b/tools/include/linux/objtool.h
index 7e72d975cb76..aca52db2f3f3 100644
--- a/tools/include/linux/objtool.h
+++ b/tools/include/linux/objtool.h
@@ -66,6 +66,17 @@ struct unwind_hint {
static void __used __section(".discard.func_stack_frame_non_standard") \
*__func_stack_frame_non_standard_##func = func
+/*
+ * STACK_FRAME_NON_STANDARD_FP() is a frame-pointer-specific function ignore
+ * for the case where a function is intentionally missing frame pointer setup,
+ * but otherwise needs objtool/ORC coverage when frame pointers are disabled.
+ */
+#ifdef CONFIG_FRAME_POINTER
+#define STACK_FRAME_NON_STANDARD_FP(func) STACK_FRAME_NON_STANDARD(func)
+#else
+#define STACK_FRAME_NON_STANDARD_FP(func)
+#endif
+
#else /* __ASSEMBLY__ */
/*
@@ -127,6 +138,7 @@ struct unwind_hint {
#define UNWIND_HINT(sp_reg, sp_offset, type, end) \
"\n\t"
#define STACK_FRAME_NON_STANDARD(func)
+#define STACK_FRAME_NON_STANDARD_FP(func)
#else
#define ANNOTATE_INTRA_FUNCTION_CALL
.macro UNWIND_HINT sp_reg:req sp_offset=0 type:req end=0