The commit is pushed to "branch-rh8-4.18.0-305.3.1.vz8.7.x-ovz" and will appear
at https://src.openvz.org/scm/ovz/vzkernel.git
after rh8-4.18.0-305.3.1.vz8.7.11
------>
commit 1e4ad734b7b1a677ce6aad618916f9de37649304
Author: Josh Poimboeuf <[email protected]>
Date: Fri Sep 10 20:13:21 2021 +0300
ms/objtool: Don't fail on missing symbol table
ms commit 1d489151e9f9
Thanks to a recent binutils change which doesn't generate unused
symbols, it's now possible for thunk_64.o be completely empty without
CONFIG_PREEMPTION: no text, no data, no symbols.
We could edit the Makefile to only build that file when
CONFIG_PREEMPTION is enabled, but that will likely create confusion
if/when the thunks end up getting used by some other code again.
Just ignore it and move on.
Reported-by: Nathan Chancellor <[email protected]>
Reviewed-by: Nathan Chancellor <[email protected]>
Reviewed-by: Miroslav Benes <[email protected]>
Tested-by: Nathan Chancellor <[email protected]>
Link: https://github.com/ClangBuiltLinux/linux/issues/1254
Signed-off-by: Josh Poimboeuf <[email protected]>
Signed-off-by: Kirill Tkhai <[email protected]>
---
tools/objtool/elf.c | 7 +++++--
1 file changed, 5 insertions(+), 2 deletions(-)
diff --git a/tools/objtool/elf.c b/tools/objtool/elf.c
index 5074163adf63..6a621c33e017 100644
--- a/tools/objtool/elf.c
+++ b/tools/objtool/elf.c
@@ -224,8 +224,11 @@ static int read_symbols(struct elf *elf)
symtab = find_section_by_name(elf, ".symtab");
if (!symtab) {
- WARN("missing symbol table");
- return -1;
+ /*
+ * A missing symbol table is actually possible if it's an empty
+ * .o file. This can happen for thunk_64.o.
+ */
+ return 0;
}
symbols_nr = symtab->sh.sh_size / symtab->sh.sh_entsize;
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