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| author | Alan Modra <amodra@gmail.com> | 2014-12-12 22:53:46 +1030 |
|---|---|---|
| committer | Alan Modra <amodra@gmail.com> | 2014-12-12 23:35:50 +1030 |
| commit | 6cabe1ea460c54c17ac877b2541eccf91d6b4b9c (patch) | |
| tree | 84b29c5ddba5350b966e8bb9a2b97b2914579caa /bfd/elf-bfd.h | |
| parent | 21daaaaffcbda47b724858dd99ee2082043ef2da (diff) | |
| download | gdb-6cabe1ea460c54c17ac877b2541eccf91d6b4b9c.zip gdb-6cabe1ea460c54c17ac877b2541eccf91d6b4b9c.tar.gz gdb-6cabe1ea460c54c17ac877b2541eccf91d6b4b9c.tar.bz2 | |
Copy relocations against protected symbols
Copy relocs are used in a scheme to avoid dynamic text relocations in
non-PIC executables that refer to variables defined in shared
libraries. The idea is to have the linker define any such variable in
the executable, with a copy reloc copying the initial value, then have
both the executable and shared library refer to the executable copy.
If the shared library defines the variable as protected then we have
two copies of the variable being used.
PR 15228
* elflink.c (_bfd_elf_adjust_dynamic_copy): Add "info" param.
Error on copy relocs against protected symbols.
(elf_merge_st_other): Set h->protected_def.
* elf-bfd.h (struct elf_link_hash_entry): Add "protected_def".
(_bfd_elf_adjust_dynamic_copy): Update prototype.
* elf-m10300.c (_bfd_mn10300_elf_adjust_dynamic_symbol): Update
_bfd_elf_adjust_dynamic_copy call.
* elf32-arm.c (elf32_arm_adjust_dynamic_symbol): Likewise.
* elf32-cr16.c (_bfd_cr16_elf_adjust_dynamic_symbol): Likewise.
* elf32-cris.c (elf_cris_adjust_dynamic_symbol): Likewise.
* elf32-hppa.c (elf32_hppa_adjust_dynamic_symbol): Likewise.
* elf32-i370.c (i370_elf_adjust_dynamic_symbol): Likewise.
* elf32-i386.c (elf_i386_adjust_dynamic_symbol): Likewise.
* elf32-lm32.c (lm32_elf_adjust_dynamic_symbol): Likewise.
* elf32-m32r.c (m32r_elf_adjust_dynamic_symbol): Likewise.
* elf32-m68k.c (elf_m68k_adjust_dynamic_symbol): Likewise.
* elf32-metag.c (elf_metag_adjust_dynamic_symbol): Likewise.
* elf32-or1k.c (or1k_elf_adjust_dynamic_symbol): Likewise.
* elf32-ppc.c (ppc_elf_adjust_dynamic_symbol): Likewise.
* elf32-s390.c (elf_s390_adjust_dynamic_symbol): Likewise.
* elf32-sh.c (sh_elf_adjust_dynamic_symbol): Likewise.
* elf32-tic6x.c (elf32_tic6x_adjust_dynamic_symbol): Likewise.
* elf32-tilepro.c (tilepro_elf_adjust_dynamic_symbol): Likewise.
* elf32-vax.c (elf_vax_adjust_dynamic_symbol): Likewise.
* elf64-ppc.c (ppc64_elf_adjust_dynamic_symbol): Likewise.
* elf64-s390.c (elf_s390_adjust_dynamic_symbol): Likewise.
* elf64-sh64.c (sh64_elf64_adjust_dynamic_symbol): Likewise.
* elf64-x86-64.c (elf_x86_64_adjust_dynamic_symbol): Likewise.
* elfnn-aarch64.c (elfNN_aarch64_adjust_dynamic_symbol): Likewise.
* elfxx-mips.c (_bfd_mips_elf_adjust_dynamic_symbol): Likewise.
* elfxx-sparc.c (_bfd_sparc_elf_adjust_dynamic_symbol): Likewise.
* elfxx-tilegx.c (tilegx_elf_adjust_dynamic_symbol): Likewise.
Diffstat (limited to 'bfd/elf-bfd.h')
| -rw-r--r-- | bfd/elf-bfd.h | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/bfd/elf-bfd.h b/bfd/elf-bfd.h index 6ce70bc..5e53cba 100644 --- a/bfd/elf-bfd.h +++ b/bfd/elf-bfd.h @@ -196,6 +196,8 @@ struct elf_link_hash_entry unsigned int pointer_equality_needed : 1; /* Symbol is a unique global symbol. */ unsigned int unique_global : 1; + /* Symbol is defined with non-default visibility. */ + unsigned int protected_def : 1; /* String table index in .dynstr if this is a dynamic symbol. */ unsigned long dynstr_index; @@ -2026,7 +2028,7 @@ extern bfd_boolean _bfd_elf_link_output_relocs struct elf_link_hash_entry **); extern bfd_boolean _bfd_elf_adjust_dynamic_copy - (struct elf_link_hash_entry *, asection *); + (struct bfd_link_info *, struct elf_link_hash_entry *, asection *); extern bfd_boolean _bfd_elf_dynamic_symbol_p (struct elf_link_hash_entry *, struct bfd_link_info *, bfd_boolean); |