diff options
| author | H.J. Lu <hjl.tools@gmail.com> | 2021-12-27 10:13:06 -0800 |
|---|---|---|
| committer | H.J. Lu <hjl.tools@gmail.com> | 2022-01-07 17:58:20 -0800 |
| commit | 3747999c6bd40a7ac905ef306a82214b336067b6 (patch) | |
| tree | b05f73242942f28863f14a2a26929104b1d5ee86 /bfd/elf-bfd.h | |
| parent | ce230579c65b9e04c830f35cb78ff33206e65db1 (diff) | |
| download | gdb-3747999c6bd40a7ac905ef306a82214b336067b6.zip gdb-3747999c6bd40a7ac905ef306a82214b336067b6.tar.gz gdb-3747999c6bd40a7ac905ef306a82214b336067b6.tar.bz2 | |
ld: Extract _bfd_elf_link_iterate_on_relocs
DT_RELR encodes consecutive R_*_RELATIVE relocations in GOT (the global
offset table) and data sections in a compact format:
https://groups.google.com/g/generic-abi/c/bX460iggiKg
On some targets, R_*_RELATIVE relocations are counted and the GOT offsets
are allocated when setting the dynamic section sizes after seeing all
relocations. R_*_RELATIVE relocations are generated while relocating
sections after section layout has been finalized.
To prepare for DT_RELR implementation on these targets, extract
_bfd_elf_link_iterate_on_relocs from _bfd_elf_link_check_relocs so
that a backend can scan relocations in elf_backend_always_size_sections
For x86 targets, the old check_relocs is renamed to scan_relocs and a
new check_relocs is added to chek input sections and create dynamic
relocation sections so that they will be mapped to output sections.
scan_relocs is now called from elf_backend_always_size_sections.
Since relocations are scanned after __start, __stop, .startof. and
.sizeof. symbols have been finalized on x86, __[start|stop]_SECNAME for
--gc-sections -z start-stop-gc are now zero when all SECNAME sections
been garbage collected. This is no need for elf_x86_start_stop_gc_p.
bfd/
* elf-bfd.h (_bfd_elf_link_iterate_on_relocs): New.
* elf32-i386.c (elf_i386_convert_load_reloc): Don't call
elf_x86_start_stop_gc_p.
(elf_i386_check_relocs): Renamed to ...
(elf_i386_scan_relocs): This. Don't call
_bfd_elf_make_dynamic_reloc_section.
(elf_i386_always_size_sections): New.
(elf_backend_check_relocs): Removed.
(elf_backend_always_size_sections): New.
* elf64-x86-64.c (elf_x86_64_convert_load_reloc): Don't call
elf_x86_start_stop_gc_p.
(elf_x86_64_check_relocs): Renamed to ...
(elf_x86_64_scan_relocs): This. Don't call
_bfd_elf_make_dynamic_reloc_section.
(elf_x86_64_always_size_sections): New.
(elf_backend_check_relocs): Removed.
(elf_backend_always_size_sections): New.
* elflink.c (elf_link_check_or_scan_relocs):
New. Extracted from _bfd_elf_link_check_relocs.
(_bfd_elf_link_check_relocs): Call elf_link_check_or_scan_relocs.
* elfxx-x86.c (_bfd_x86_elf_check_relocs): New.
* elfxx-x86.h (X86_64_NEED_DYNAMIC_RELOC_TYPE_P): New.
(I386_NEED_DYNAMIC_RELOC_TYPE_P): Likewise.
(X86_NEED_DYNAMIC_RELOC_TYPE_P): Likewise.
(_bfd_x86_elf_check_relocs): Likewise.
(elf_backend_check_relocs): Likewise.
(elf_backend_always_size_sections): Removed.
(elf_x86_start_stop_gc_p): Likewise.
ld/
* testsuite/ld-i386/pr27491-1a.d: Updated.
* testsuite/ld-x86-64/pr27491-1a.d: Likewise.
Diffstat (limited to 'bfd/elf-bfd.h')
| -rw-r--r-- | bfd/elf-bfd.h | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/bfd/elf-bfd.h b/bfd/elf-bfd.h index 896aa08..81f8fd4 100644 --- a/bfd/elf-bfd.h +++ b/bfd/elf-bfd.h @@ -2632,6 +2632,10 @@ extern int bfd_elf_add_dt_needed_tag (bfd *, struct bfd_link_info *); extern bool _bfd_elf_link_check_relocs (bfd *, struct bfd_link_info *); +extern bool _bfd_elf_link_iterate_on_relocs + (bfd *, struct bfd_link_info *, + bool (*) (bfd *, struct bfd_link_info *, asection *, + const Elf_Internal_Rela *)); extern bool bfd_elf_link_record_dynamic_symbol (struct bfd_link_info *, struct elf_link_hash_entry *); |