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| 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 /ld/testsuite/ld-x86-64 | |
| 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 'ld/testsuite/ld-x86-64')
| -rw-r--r-- | ld/testsuite/ld-x86-64/pr27491-1a.d | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/ld/testsuite/ld-x86-64/pr27491-1a.d b/ld/testsuite/ld-x86-64/pr27491-1a.d index ade5c6f..215124c 100644 --- a/ld/testsuite/ld-x86-64/pr27491-1a.d +++ b/ld/testsuite/ld-x86-64/pr27491-1a.d @@ -9,6 +9,6 @@ Disassembly of section .text: [a-f0-9]+ <foo>: - +[a-f0-9]+: 48 8b 05 ([0-9a-f]{2} ){4}[ \t]+mov +0x[a-f0-9]+\(%rip\),%rax[ \t]+# [a-f0-9]+ <_DYNAMIC\+0x[a-f0-9]+> - +[a-f0-9]+: 48 8b 05 ([0-9a-f]{2} ){4}[ \t]+mov +0x[a-f0-9]+\(%rip\),%rax[ \t]+# [a-f0-9]+ <_DYNAMIC\+0x[a-f0-9]+> + +[a-f0-9]+: 48 c7 c0 00 00 00 00 mov \$0x0,%rax + +[a-f0-9]+: 48 c7 c0 00 00 00 00 mov \$0x0,%rax #pass |