[PATCH v5 12/36] vmlinux.lds.h: Add .symtab, .strtab, and .shstrtab to ELF_DETAILS

Kees Cook
2020-07-31T23:08:43Z

When linking vmlinux with LLD, the synthetic sections .symtab, .strtab,
and .shstrtab are listed as orphaned. Add them to the ELF_DETAILS section
so there will be no warnings when --orphan-handling=warn is used more
widely. (They are added above comment as it is the more common
order[1].)

ld.lld: warning: <internal>:(.symtab) is being placed in '.symtab'
ld.lld: warning: <internal>:(.shstrtab) is being placed in '.shstrtab'
ld.lld: warning: <internal>:(.strtab) is being placed in '.strtab'

[1] https://lore.kernel.org/lkml/20200622224928.o2a7jkq33guxfci4@google.com/

Reported-by: Fangrui Song <maskray@google.com>
Signed-off-by: Kees Cook <keescook@chromium.org>
---
include/asm-generic/vmlinux.lds.h | 5 ++++-
1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/include/asm-generic/vmlinux.lds.h b/include/asm-generic/vmlinux.lds.h
index 22c9a68c02ae..2593957f6e8b 100644
--- a/include/asm-generic/vmlinux.lds.h
+++ b/include/asm-generic/vmlinux.lds.h
@@ -799,7 +799,10 @@

/* Required sections not related to debugging. */
#define ELF_DETAILS \
- .comment 0 : { *(.comment) }
+ .comment 0 : { *(.comment) } \
+ .symtab 0 : { *(.symtab) } \
+ .strtab 0 : { *(.strtab) } \
+ .shstrtab 0 : { *(.shstrtab) }

#ifdef CONFIG_GENERIC_BUG
#define BUG_TABLE \
--
2.25.1