From 2f7340b2834385328346377b624f6b4694749e02 Mon Sep 17 00:00:00 2001 From: markj Date: Fri, 13 Nov 2015 01:25:02 +0000 Subject: MFC r290320: Have elf_lookup() return an error if the specified non-weak symbol could not be found. Otherwise, relocations against such symbols will be silently ignored instead of causing an error to be raised. --- sys/kern/link_elf.c | 4 ++++ 1 file changed, 4 insertions(+) (limited to 'sys/kern') diff --git a/sys/kern/link_elf.c b/sys/kern/link_elf.c index b4f6586..3b03d6f 100644 --- a/sys/kern/link_elf.c +++ b/sys/kern/link_elf.c @@ -1544,6 +1544,10 @@ elf_lookup(linker_file_t lf, Elf_Size symidx, int deps, Elf_Addr *res) } addr = ((Elf_Addr)linker_file_lookup_symbol(lf, symbol, deps)); + if (addr == 0 && ELF_ST_BIND(sym->st_info) != STB_WEAK) { + *res = 0; + return (EINVAL); + } if (elf_set_find(&set_pcpu_list, addr, &start, &base)) addr = addr - start + base; -- cgit v1.1