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objtool: Add arch specific function arch_ftrace_match()

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

Suggested-by: Christophe Leroy <christophe.leroy@csgroup.eu>
Tested-by: Naveen N. Rao <naveen.n.rao@linux.vnet.ibm.com>
Reviewed-by: Naveen N. Rao <naveen.n.rao@linux.vnet.ibm.com>
Reviewed-by: Christophe Leroy <christophe.leroy@csgroup.eu>
Acked-by: Josh Poimboeuf <jpoimboe@kernel.org>
Signed-off-by: Sathvika Vasireddy <sv@linux.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20221114175754.1131267-15-sv@linux.ibm.com
This commit is contained in:
Sathvika Vasireddy 2022-11-14 23:27:52 +05:30 committed by Michael Ellerman
parent c144973521
commit 4ca993d498
3 changed files with 8 additions and 1 deletions
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5
tools/objtool/arch/x86/decode.c
View File

@ -23,6 +23,11 @@
#include <objtool/builtin.h>
#include <arch/elf.h>
int arch_ftrace_match(char *name)
{
return !strcmp(name, "__fentry__");
}
static int is_x86_64(const struct elf *elf)
{
switch (elf->ehdr.e_machine) {

2
tools/objtool/check.c
View File

@ -2316,7 +2316,7 @@ static int classify_symbols(struct objtool_file *file)
if (arch_is_rethunk(func))
func->return_thunk = true;
if (!strcmp(func->name, "__fentry__"))
if (arch_ftrace_match(func->name))
func->fentry = true;
if (is_profiling_func(func->name))

2
tools/objtool/include/objtool/arch.h
View File

@ -69,6 +69,8 @@ struct stack_op {
struct instruction;
int 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,