From: Alan Modra <amodra@gmail.com>
Date: Mon, 22 Apr 2024 00:00:23 +0000 (+0930)
Subject: copy_private_symbol_data
X-Git-Tag: gdb-15-branchpoint~288
X-Git-Url: http://git.ipfire.org/?a=commitdiff_plain;h=6705e14a9943e48ccf0f4829a9c23d66b5b83aae;p=thirdparty%2Fbinutils-gdb.git

copy_private_symbol_data

bfd_copy_private_symbol_data is a bfd function that appeared in
commit 89665c8562da a long time ago, but seemingly wasn't used
anywhere until Jan added it to gas/symbols.c in commit 6a2b6326c21e.

The function is used to modify ELF symbol st_shndx for symbols defined
in odd sections like .symtab, so that they get the corresponding
section st_shndx in an output file.  This patch fixes some bitrot in
the function.  After commit c03551323c04 which introduced
output_elf_obj_tdata, elf_strtab_sec and elf_shstrtab_sec will
segfault if used on an input bfd.

	PR 14493
	* elf.c (_bfd_elf_copy_private_symbol_data): Don't use
	elf_strtab_sec and elf_shstrtab_sec.
---

diff --git a/bfd/elf.c b/bfd/elf.c
index 52a6a2f56c3..41ec649ebab 100644
--- a/bfd/elf.c
+++ b/bfd/elf.c
@@ -8785,9 +8785,9 @@ _bfd_elf_copy_private_symbol_data (bfd *ibfd,
 	shndx = MAP_ONESYMTAB;
       else if (shndx == elf_dynsymtab (ibfd))
 	shndx = MAP_DYNSYMTAB;
-      else if (shndx == elf_strtab_sec (ibfd))
+      else if (shndx == elf_elfsections (ibfd)[elf_onesymtab (ibfd)]->sh_link)
 	shndx = MAP_STRTAB;
-      else if (shndx == elf_shstrtab_sec (ibfd))
+      else if (shndx == elf_elfheader (ibfd)->e_shstrndx)
 	shndx = MAP_SHSTRTAB;
       else if (find_section_in_list (shndx, elf_symtab_shndx_list (ibfd)))
 	shndx = MAP_SYM_SHNDX;