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* [binutils-gdb] ELF: emit symbol table when there are relocations
@ 2022-08-02 13:43 Jan Beulich
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From: Jan Beulich @ 2022-08-02 13:43 UTC (permalink / raw)
To: bfd-cvs
https://sourceware.org/git/gitweb.cgi?p=binutils-gdb.git;h=2ba2f096185c201607cdb1571e51e00e8b66e449
commit 2ba2f096185c201607cdb1571e51e00e8b66e449
Author: Jan Beulich <jbeulich@suse.com>
Date: Tue Aug 2 15:43:26 2022 +0200
ELF: emit symbol table when there are relocations
Even when there are no symbols (e.g. all relocations being against
absolute values), a symbol table (with just the first placeholder entry)
needs to be emitted. Otherwise tools like objdump won't properly process
the relocations. The respective checks in assign_section_numbers() and
_bfd_elf_compute_section_file_positions() support also this view. Oddly
enough so far HAS_RELOC was only set when reading in an object file, but
not when generating one anew; the flag would only have been cleared when
no relocations were found (anymore).
While there also amend the affected function's leading comment to also
mention gas.
Diff:
---
bfd/elf.c | 6 ++++--
1 file changed, 4 insertions(+), 2 deletions(-)
diff --git a/bfd/elf.c b/bfd/elf.c
index 89484ceb233..25f4bca34f0 100644
--- a/bfd/elf.c
+++ b/bfd/elf.c
@@ -3674,7 +3674,7 @@ elf_get_reloc_section (asection *reloc_sec)
/* Assign all ELF section numbers. The dummy first section is handled here
too. The link/info pointers for the standard section types are filled
in here too, while we're at it. LINK_INFO will be 0 when arriving
- here for objcopy, and when using the generic ELF linker. */
+ here for gas, objcopy, and when using the generic ELF linker. */
static bool
assign_section_numbers (bfd *abfd, struct bfd_link_info *link_info)
@@ -3717,9 +3717,11 @@ assign_section_numbers (bfd *abfd, struct bfd_link_info *link_info)
reloc_count += sec->reloc_count;
}
- /* Clear HAS_RELOC if there are no relocations. */
+ /* Set/clear HAS_RELOC depending on whether there are relocations. */
if (reloc_count == 0)
abfd->flags &= ~HAS_RELOC;
+ else
+ abfd->flags |= HAS_RELOC;
}
for (sec = abfd->sections; sec; sec = sec->next)
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