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| author | Alan Modra <amodra@gmail.com> | 2022-01-07 07:49:16 +1030 |
|---|---|---|
| committer | Alan Modra <amodra@gmail.com> | 2022-01-18 11:18:45 +1030 |
| commit | 1657026ccd8aa05a97cb35f1d9bff646937a244e (patch) | |
| tree | b21238f5d3e2c272a9d6a27642d7047a99b29a92 /ld/emulparams | |
| parent | 97da0e2677c4a38df2406576428ec27d1da26e7c (diff) | |
| download | binutils-gdb-1657026ccd8aa05a97cb35f1d9bff646937a244e.tar.gz | |
PowerPC64 DT_RELR
PowerPC64 takes a more traditional approach to DT_RELR than x86. Count
relative relocs in check_relocs, allocate space for them and output in
the usual places but not doing so when enable_dt_relr. DT_RELR is
sized in the existing ppc stub relaxation machinery, run via the
linker's ldemul_after_allocation hook. DT_RELR is output in the same
function that writes ppc stubs, run via ldemul_finish.
This support should be considered experimental.
bfd/
* elf64-ppc.c (struct ppc_local_dyn_relocs): Renamed from
ppc_dyn_relocs. Add rel_count field. Update uses.
(struct ppc_dyn_relocs): New. Replace all uses of elf_dyn_relocs.
(struct ppc_link_hash_table): Add relr_alloc, relr_count and
relr_addr.
(ppc64_elf_copy_indirect_symbol): Merge rel_count.
(ppc64_elf_check_relocs): Init rel_count for global and local syms.
(dec_dynrel_count): Change r_info param to reloc pointer. Update
all callers. Handle decrementing rel_count.
(allocate_got): Don't allocate space for relative relocs when
enable_dt_relr.
(allocate_dynrelocs): Likewise.
(ppc64_elf_size_dynamic_sections): Likewise. Handle srelrdyn.
(ppc_build_one_stub): Don't emit relative relocs on .branch_lt.
(compare_relr_address, append_relr_off): New functions.
(got_and_plt_relr_for_local_syms, got_and_plt_relr): Likewise.
(ppc64_elf_size_stubs): Size .relr.syn.
(ppc64_elf_build_stubs): Emit .relr.dyn.
(build_global_entry_stubs_and_plt): Don't output relative relocs
when enable_dt_relr.
(write_plt_relocs_for_local_syms): Likewise.
(ppc64_elf_relocate_section): Likewise.
binutils/
* testsuite/lib/binutils-common.exp (supports_dt_relr): Add
powerpc64.
ld/
* emulparams/elf64ppc.sh: Source dt-relr.sh.
* testsuite/ld-elf/dt-relr-2b.d: Adjust for powerpc.
* testsuite/ld-elf/dt-relr-2c.d: Likewise.
* testsuite/ld-elf/dt-relr-2d.d: Likewise.
* testsuite/ld-elf/dt-relr-2e.d: Likewise.
Diffstat (limited to 'ld/emulparams')
| -rw-r--r-- | ld/emulparams/elf64ppc.sh | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/ld/emulparams/elf64ppc.sh b/ld/emulparams/elf64ppc.sh index 15221b82220..a18393b7202 100644 --- a/ld/emulparams/elf64ppc.sh +++ b/ld/emulparams/elf64ppc.sh @@ -1,5 +1,6 @@ source_sh ${srcdir}/emulparams/elf32ppccommon.sh source_sh ${srcdir}/emulparams/plt_unwind.sh +source_sh ${srcdir}/emulparams/dt-relr.sh EXTRA_EM_FILE=ppc64elf ELFSIZE=64 OUTPUT_FORMAT="elf64-powerpc" |