[PATCH v6 4/9] objtool: Handle unreachable entry of rodata

From: Tiezhu Yang
Date: Mon Dec 16 2024 - 20:09:47 EST


When compiling with Clang on LoongArch, there exists unreachable entry of
rodata which points to a position after the function return instruction,
this is generated by compiler to fill the non-existent switch case, just
skip the entry when parsing the relocation section of rodata.

Signed-off-by: Tiezhu Yang <yangtiezhu@xxxxxxxxxxx>
---
tools/objtool/check.c | 7 ++++---
1 file changed, 4 insertions(+), 3 deletions(-)

diff --git a/tools/objtool/check.c b/tools/objtool/check.c
index cff7416b207e..654cffcf9512 100644
--- a/tools/objtool/check.c
+++ b/tools/objtool/check.c
@@ -1986,9 +1986,10 @@ static int add_jump_table(struct objtool_file *file, struct instruction *insn,
if (!dest_insn)
break;

- /* Make sure the destination is in the same function: */
- if (!insn_func(dest_insn) || insn_func(dest_insn)->pfunc != pfunc)
- break;
+ if (!insn_func(dest_insn) || insn_func(dest_insn)->pfunc != pfunc) {
+ prev_offset = reloc_offset(reloc);
+ continue;
+ }

alt = malloc(sizeof(*alt));
if (!alt) {
--
2.42.0