From 2b232a22d8225df419a92ca69ddeeb4e5fe902f7 Mon Sep 17 00:00:00 2001 From: Julien Thierry Date: Tue, 15 Sep 2020 08:53:18 +0100 Subject: [PATCH] objtool: Handle calling non-function symbols in other sections Relocation for a call destination could point to a symbol that has type STT_NOTYPE. Lookup such a symbol when no function is available. Signed-off-by: Julien Thierry Signed-off-by: Josh Poimboeuf --- tools/objtool/check.c | 19 ++++++++++++++----- 1 file changed, 14 insertions(+), 5 deletions(-) diff --git a/tools/objtool/check.c b/tools/objtool/check.c index cd7c6698d316..a4796e32bbd1 100644 --- a/tools/objtool/check.c +++ b/tools/objtool/check.c @@ -815,6 +815,17 @@ static void remove_insn_ops(struct instruction *insn) } } +static struct symbol *find_call_destination(struct section *sec, unsigned long offset) +{ + struct symbol *call_dest; + + call_dest = find_func_by_offset(sec, offset); + if (!call_dest) + call_dest = find_symbol_by_offset(sec, offset); + + return call_dest; +} + /* * Find the destination instructions for all calls. */ @@ -832,9 +843,7 @@ static int add_call_destinations(struct objtool_file *file) insn->offset, insn->len); if (!reloc) { dest_off = arch_jump_destination(insn); - insn->call_dest = find_func_by_offset(insn->sec, dest_off); - if (!insn->call_dest) - insn->call_dest = find_symbol_by_offset(insn->sec, dest_off); + insn->call_dest = find_call_destination(insn->sec, dest_off); if (insn->ignore) continue; @@ -852,8 +861,8 @@ static int add_call_destinations(struct objtool_file *file) } else if (reloc->sym->type == STT_SECTION) { dest_off = arch_dest_reloc_offset(reloc->addend); - insn->call_dest = find_func_by_offset(reloc->sym->sec, - dest_off); + insn->call_dest = find_call_destination(reloc->sym->sec, + dest_off); if (!insn->call_dest) { WARN_FUNC("can't find call dest symbol at %s+0x%lx", insn->sec, insn->offset,