[RFC PATCH v3 08/12] objtool: Add arch specific function arch_ftrace_match()

[Sathvika Vasireddy <sv@linux.ibm.com>]

Add architecture specific function to look for
relocation records pointing to arch specific
symbols.

Suggested-by: Christophe Leroy <christophe.leroy@csgroup.eu>
Signed-off-by: Sathvika Vasireddy <sv@linux.ibm.com>
---
 tools/objtool/arch/x86/decode.c      | 8 ++++++++
 tools/objtool/check.c                | 2 +-
 tools/objtool/include/objtool/arch.h | 2 ++
 3 files changed, 11 insertions(+), 1 deletion(-)

diff --git a/tools/objtool/arch/x86/decode.c b/tools/objtool/arch/x86/decode.c
index 8b990a52aada..6a66b0c0dd2c 100644
--- a/tools/objtool/arch/x86/decode.c
+++ b/tools/objtool/arch/x86/decode.c
@@ -23,6 +23,14 @@
 #include <objtool/builtin.h>
 #include <arch/elf.h>
 
+bool arch_ftrace_match(char *name)
+{
+	if (!strcmp(func->name, "__fentry__"))
+		return true;
+
+	return false;
+}
+
 static int is_x86_64(const struct elf *elf)
 {
 	switch (elf->ehdr.e_machine) {
diff --git a/tools/objtool/check.c b/tools/objtool/check.c
index 88f68269860e..51b6dcec8d6a 100644
--- a/tools/objtool/check.c
+++ b/tools/objtool/check.c
@@ -2185,7 +2185,7 @@ static int classify_symbols(struct objtool_file *file)
 			if (arch_is_retpoline(func))
 				func->retpoline_thunk = true;
 
-			if (!strcmp(func->name, "__fentry__"))
+			if (arch_ftrace_match(func->name))
 				func->fentry = true;
 
 			if (is_profiling_func(func->name))
diff --git a/tools/objtool/include/objtool/arch.h b/tools/objtool/include/objtool/arch.h
index 9b19cc304195..99d0c8ba1b69 100644
--- a/tools/objtool/include/objtool/arch.h
+++ b/tools/objtool/include/objtool/arch.h
@@ -69,6 +69,8 @@ struct stack_op {
 
 struct instruction;
 
+bool arch_ftrace_match(char *name);
+
 void arch_initial_func_cfi_state(struct cfi_init_state *state);
 
 int arch_decode_instruction(struct objtool_file *file, const struct section *sec,
-- 
2.25.1