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ELFv2 functions with localentry:0 are those with a single entry point,
ie. global entry == local entry, and that have no requirement on r2 or
r12, and guarantee r2 is unchanged on return. Such an external
function can be called via the PLT without saving r2 or restoring it
on return, avoiding a common load-hit-store for small functions. The
optimization is attractive. The TOC pointer load-hit-store is a major
reason why calls to small functions that need no register saves, or
with shrink-wrap, no register saves on a fast path, are slow on
powerpc64le.
To be safe, this optimization needs ld.so support to check that the
run-time matches link-time function implementation. If a function
in a shared library with st_other localentry non-zero is called
without saving and restoring r2, r2 will be trashed on return, leading
to segfaults. For that reason the optimization does not happen for
weak functions since a weak definition is a fairly solid hint that the
function will likely be overridden. I'm also not enabling the
optimization by default unless glibc-2.26 is detected, which should
have the ld.so checks implemented.
bfd/
* elf64-ppc.c (struct ppc_link_hash_table): Add has_plt_localentry0.
(ppc64_elf_merge_symbol_attribute): Merge localentry bits from
dynamic objects.
(is_elfv2_localentry0): New function.
(ppc64_elf_tls_setup): Default params->plt_localentry0.
(plt_stub_size): Adjust size for tls_get_addr_opt stub.
(build_tls_get_addr_stub): Use a simpler stub when r2 is not saved.
(ppc64_elf_size_stubs): Leave stub_type as ppc_stub_plt_call for
optimized localentry:0 stubs.
(ppc64_elf_build_stubs): Save r2 in ELFv2 __glink_PLTresolve.
(ppc64_elf_relocate_section): Leave nop unchanged for optimized
localentry:0 stubs.
(ppc64_elf_finish_dynamic_sections): Set PPC64_OPT_LOCALENTRY in
DT_PPC64_OPT.
* elf64-ppc.h (struct ppc64_elf_params): Add plt_localentry0.
include/
* elf/ppc64.h (PPC64_OPT_LOCALENTRY): Define.
ld/
* emultempl/ppc64elf.em (params): Init plt_localentry0 field.
(enum ppc64_opt): New, replacing OPTION_* defines. Add
OPTION_PLT_LOCALENTRY, and OPTION_NO_PLT_LOCALENTRY.
(PARSE_AND_LIST_*): Support --plt-localentry and --no-plt-localentry.
* testsuite/ld-powerpc/elfv2so.d: Update.
* testsuite/ld-powerpc/powerpc.exp (TLS opt 5): Use --no-plt-localentry.
* testsuite/ld-powerpc/tlsopt5.d: Update.
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Lots of fixes for the compatibility code that handles linking of
-mcall-aixdesc code (or that generated by 12 year old gcc) with
current ELFv1 ABI code.
1) A reference to a dot-symbol in an object file wasn't satisfied by a
function descriptor in later object files.
2) The as-needed code had bit-rotted; Shared libs now need a strong
reference to be counted as needed.
3) --gc-sections involving dot-symbols was broken, needing
func_desc_adjust to be run early and lots of other fixes.
bfd/
* elf64-ppc.c (struct ppc_link_hash_entry): Delete "was_undefined".
(struct ppc_link_hash_table): Delete "twiddled_syms". Add
"need_func_desc_adj".
(lookup_fdh): Link direct fdh sym via oh field and set flags.
(make_fdh): Make strong and weak undefined function descriptor
symbols.
(ppc64_elf_merge_symbol): New function.
(elf_backend_merge_symbol): Define.
(ppc64_elf_archive_symbol_lookup): Don't test undefweak for fake
function descriptors.
(add_symbol_adjust): Don't twiddle symbols to undefweak.
Propagate more ref flags to function descriptor symbol. Make
some function descriptor symbols dynamic.
(ppc64_elf_before_check_relocs): Only run add_symbol_adjust for
ELFv1. Set need_func_desc_adj. Don't fix undefs list.
(ppc64_elf_check_relocs): Set non_ir_ref for descriptors.
Don't call lookup_fdh here.
(ppc64_elf_gc_sections): New function.
(bfd_elf64_bfd_gc_sections): Define.
(ppc64_elf_gc_mark_hook): Mark descriptor.
(func_desc_adjust): Don't make fake function descriptor syms strong
here. Exit earlier on non-dotsyms. Take note of elf.dynamic
flag when deciding whether a dynamic function descriptor might
be needed. Transfer elf.dynamic and set elf.needs_plt. Move
plt regardless of visibility. Make descriptor dynamic if
entry sym is dynamic, not for other cases.
(ppc64_elf_func_desc_adjust): Don't run func_desc_adjust if
already done.
(ppc64_elf_edit_opd): Use oh field rather than lookup_fdh.
(ppc64_elf_size_stubs): Likewise.
(ppc_build_one_stub): Don't clear was_undefined. Only set sym
undefweak if stub symbol is defined.
(undo_symbol_twiddle, ppc64_elf_restore_symbols): Delete.
* elf64-ppc.h (ppc64_elf_restore_symbols): Don't declare.
ld/
* emultempl/ppc64elf.em (gld${EMULATION_NAME}_finish): Don't call
ppc64_elf_restore_symbols.
* testsuite/ld-powerpc/dotsym1.d: New.
* testsuite/ld-powerpc/dotsym2.d: New.
* testsuite/ld-powerpc/dotsym3.d: New.
* testsuite/ld-powerpc/dotsym4.d: New.
* testsuite/ld-powerpc/dotsymref.s: New.
* testsuite/ld-powerpc/nodotsym.s: New.
* testsuite/ld-powerpc/powerpc.exp: Run new tests.
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Sometimes it may be of benefit to force use of the __tls_get_addr_opt
call stub even when the glibc being used during linking does not
advertise __tls_get_addr_opt.
bfd/
* elf64-ppc.h (struct ppc64_elf_params <tls_get_addr_opt>): Rename
from no_tls_get_addr_opt.
* elf64-ppc.c: Update for rename and inversion of tls_get_addr_opt.
(ppc64_elf_tls_setup): Set tls_get_addr_opt to 0 only when at
default of -1.
ld/
* emultempl/ppc64elf.em (params): Init tls_get_addr_opt field to -1.
(OPTION_TLS_GET_ADDR_OPT): Define.
(PARSE_AND_LIST_LONGOPTS): Handle --tls-get-addr-opt.
(PARSE_AND_LIST_OPTIONS, PARSE_AND_LIST_ARGS_CASES): Likewise.
* ld.texinfo: Document --tls-get-addr-optimize and
--no-tls-get-addr-optimize.
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The changes to reorder sections for better relro protection on powerpc64,
3e2b0f31, 23283c1b, and 5ad18f16, run into a problem with xlc.
xlc -qdatalocal puts global variables into .toc, which means that .toc
must be writable. The simplest way to accomplish this is to edit the
linker script to remove .toc sections from .got on detecting xlc object
files.
bfd/
* elf64-ppc.h (struct ppc64_elf_params): Add "object_in_toc".
* elf64-ppc.c (ppc64_elf_add_symbol_hook): Assume that global symbols
in .toc indicate xlc compiled code that might require a rw .toc.
ld/
* emulparams/elf64ppc.sh (INITIAL_READWRITE_SECTIONS): Define.
* emultempl/ppc64elf.em (params): Init new field.
(ppc_after_open): New function.
(LDEMUL_AFTER_OPEN): Define.
* ldlang.c (lang_final): Whitespace fix.
ld/testsuite/
* ld-powerpc/tocvar.d, * ld-powerpc/tocvar.s: New test.
* ld-powerpc/tocnovar.d, * ld-powerpc/tocnovar.s: New test.
* ld-powerpc/powerpc.exp: Run tocvar and tocnovar.
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* elf64-ppc.h (ppc64_elf_set_toc): Fix indentation.
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This patch allows the user to override powerpc64-ld's default for
providing linker generated register save and restore functions as used
by gcc -Os code. Normally these are not provided by ld -r, so Linux
kernel modules have needed to include their own copies.
bfd/
* elf64-ppc.h (struct ppc64_elf_params): Add save_restore_funcs.
* elf64-ppc.c (ppc64_elf_func_desc_adjust): Use it to control
provision of out-of-line register save/restore routines.
ld/
* emultempl/ppc64elf.em (params): Init new field.
(ppc_create_output_section_statements): Set params.save_restore_funcs
default.
(PARSE_AND_LIST_*): Add support for --save-restore-funcs and
--no-save-restore-funcs.
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Moves assorted variables used to communicate between ld and bfd into
a struct, hooks it into the bfd link_hash_table early, and removes
all other places where such variables were passed piecemeal.
bfd/
* elf64-ppc.h (struct ppc64_elf_params): Define.
(ppc64_elf_init_stub_bfd, ppc64_elf_edit_opd, ppc64_elf_tls_setup,
ppc64_elf_setup_section_lists, ppc64_elf_size_stubs,
ppc64_elf_build_stubs): Update prototype.
* elf64-ppp.c (struct ppc_link_hash_table): Add params, delete other
fields now in params. Adjust code throughout file.
(ppc64_elf_init_stub_bfd): Delete "abfd" parameter, add "params".
Save params pointer in htab.
(ppc64_elf_edit_opd, ppc64_elf_tls_setup,
ppc64_elf_setup_section_lists, ppc64_elf_size_stubs,
ppc64_elf_build_stubs): Remove parameters now in "params".
ld/
* emultemps/ppc64elf.em (params): New static struct replacing
various other static vars. Adjust code throughout file.
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* elf64-ppc.h (ppc64_elf_toc): Delete.
(ppc64_elf_set_toc): Declare.
* elf64-ppc.c (ppc64_elf_toc_reloc): Replace call to ppc64_elf_toc
with call the ppc64_elf_set_toc.
(ppc64_elf_toc_ha_reloc, ppc64_elf_toc64_reloc): Likewise.
(ppc64_elf_start_multitoc_partition): Likewise.
(struct ppc_link_hash_table): Delete dot_toc_dot. Replace all uses
with elf.hgot.
(ppc64_elf_process_dot_syms): Don't make a fake function descriptor
for ".TOC.".
(ppc64_elf_check_relocs): Mark sections with a reference to .TOC.
as needing a toc pointer.
(ppc64_elf_size_stubs): Don't set dot_toc_dot here.
(ppc64_elf_set_toc): Rename from ppc64_elf_toc. Add info param.
Set elf.hgot value.
ld/
* emultempl/ppc64elf.em: (ppc_layout_sections_again): Call
ppc64_elf_set_toc rather than ppc64_elf_toc/_bfd_set_gp_value.
(gld${EMULATION_NAME}_after_allocation): Likewise.
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* elf64-ppc.c (ppc64_elf_check_relocs): Don't call
create_linkage_sections here..
(ppc64_elf_init_stub_bfd): ..do so here. Return status.
(create_linkage_sections): Move earlier in file.
(ppc64_elf_setup_section_lists): Remove now useless htab->brlt test.
* elf64-ppc.h (ppc64_elf_init_stub_bfd): Update proto.
ld/
* emultempl/ppc64elf.em (ppc_create_output_section_statements):
Check return from ppc64_elf_init_stub_bfd.
ld/testsuite/
* ld-powerpc/tlsexe.d: Adjust.
* ld-powerpc/tlsexe.r: Adjust.
* ld-powerpc/tlsexetoc.d: Adjust.
* ld-powerpc/tlsexetoc.r: Adjust.
* ld-powerpc/tlsso.d: Adjust.
* ld-powerpc/tlsso.r: Adjust.
* ld-powerpc/tlstocso.d: Adjust.
* ld-powerpc/tlstocso.r: Adjust.
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* elf64-ppc.c: Define more insns used in plt call stubs.
(ppc64_elf_brtaken_reloc): Assume isa version 2 or above.
(ppc64_elf_relocate_section): Likewise.
(enum ppc_stub_type): Add ppc_stub_plt_call_r2save.
(struct ppc_link_hash_table): Increase size of stub_count array.
Add plt_stub_align and plt_thread_safe.
(ALWAYS_USE_FAKE_DEP, ALWAYS_EMIT_R2SAVE): Define.
(plt_stub_size, plt_stub_pad): New functions.
(build_plt_stub): Emit barriers for power7 thread safety. Don't
emit needless save of r2.
(build_tls_get_addr_stub): Adjust params.
(ppc_build_one_stub): Handle ppc_stub_plt_call_r2save and aligning
plt stubs. Adjust build_*plt_stub calls.
(ppc_size_one_stub): Similarly.
(ppc64_elf_size_stubs): Accept plt_thread_safe and plt_stub_align
params. Choose default for plt_thread_safe based on existence of
calls to thread creation functions. Modify plt_call to
plt_call_r2save when no tocsave reloc found. Align tail of stub
sections.
(ppc64_elf_build_stubs): Align tail of stub sections. Adjust
output of stub statistics.
(ppc64_elf_relocate_section): Handle ppc_stub_plt_call_r2save.
* elf64-ppc.h (ppc64_elf_size_stubs): Update prototype.
ld/
* emultempl/ppc64elf.em (PARSE_AND_LIST_PROLOGUE,
PARSE_AND_LIST_LONGOPTS, PARSE_AND_LIST_OPTIONS,
PARSE_AND_LIST_ARGS_CASES): Handle --{no-,}plt-thread-safe and
--{no-,}plt-align.
(plt_thread_safe, plt_stub_align): New vars.
(gld${EMULATION_NAME}_after_allocation): Pass them to
ppc64_elf_size_stubs. Align stub sections according to plt_stub_align.
* ld.texinfo: Document new command line options, and an old
undocumented option.
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* elf64-ppc.c (struct ppc_link_hash_table): Add plt_static_chain.
(build_plt_stub): Add plt_static_chain param, don't load r11 if false.
(build_tls_get_addr_stub): Likewise.
(ppc_build_one_stub): Update calls to above.
(ppc_size_one_stub): Adjust stub size.
(ppc64_elf_size_stubs): Add plt_static_chain param, save to htab.
* elf64-ppc.h (ppc64_elf_size_stubs): Update prototype.
ld/
* emultempl/ppc64elf.em (plt_static_chain): New var.
(gld${EMULATION_NAME}_after_allocation): Pass to ppc64_elf_size_stubs.
(PARSE_AND_LIST_PROLOGUE, PARSE_AND_LIST_LONGOPTS,
PARSE_AND_LIST_OPTIONS, PARSE_AND_LIST_ARGS_CASES): Handle
--plt-static-chain and --no-plt-static-chain.
ld/testsuite/
* ld-powerpc/tlsexe.d, * ld-powerpc/tlsexe.g. *ld-powerpc/tlsexe.r,
* ld-powerpc/tlsexetoc.d, * ld-powerpc/tlsexetoc.g,
* ld-powerpc/tlsexetoc.r, * ld-powerpc/tlsso.d,
* ld-powerpc/tlstocso.d: Update for plt stub change.
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* elf64-ppc.h (ppc64_elf_has_small_toc_reloc): Declare.
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PR ld/11378
* elf64-ppc.h (ppc64_elf_check_init_fini): Declare.
* elf64-ppc.c (call_check_done): Define.
(ppc64_elf_add_symbol_hook): Substitute bfd_get_section_name macro.
(ppc64_elf_check_relocs, ppc64_elf_size_dynamic_sections): Likewise.
(ppc64_elf_finish_multitoc_partition): Remove unnecessary check.
(toc_adjusting_stub_needed): Use call_check_done rather than toc_off.
Simplify return logic. Iterate over all .init and .fini fragments
by recursion. Set makes_toc_func_call here..
(ppc64_elf_next_input_section): ..rather than here.
(check_pasted_section, ppc64_elf_check_init_fini): New functions.
ld/
PR ld/11378
* emultempl/ppc64elf.em (gld${EMULATION_NAME}_after_allocation): Call
ppc64_elf_check_init_fini and warn if .init/.fini use different TOCs.
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* elf64-ppc.c (struct ppc_link_hash_table): Add do_multi_toc.
(has_small_toc_reloc): Define.
(ppc64_elf_check_relocs): Set the above flags.
(ppc64_elf_edit_opd): Delete obfd param.
(ppc64_elf_tls_optimize): Likewise.
(ppc64_elf_edit_toc): Likewise.
(ppc64_elf_tls_setup): Likewise. Add no_multi_toc param.
* elf64-ppc.h: Update prototypes.
ld/
* emultempl/ppc64elf.em (ppc_before_allocation): Update for changed
function parameters.
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* elf64-ppc.c (struct plt_entry): Move earlier in file.
(struct got_entry): Likewise. Add is_indirect and got.ent fields.
(struct ppc64_elf_obj_tdata): Change tlsld_got to be a struct got_entry.
Update all uses.
(struct ppc_link_hash_table): Add got_reli_size and second_toc_pass.
Remove no_multi_toc.
(update_local_sym_info, ppc64_elf_check_relocs): Clear is_indirect
when allocating a new struct got_entry.
(allocate_got): New function, extracted from..
(allocate_dynrelocs): ..here. Abort on got entry in non-ppc64 bfd.
(ppc64_elf_size_dynamic_sections): Track got relocs allocated in
.reliplt by got_reli_size. Set owner on ppc64_tlsld_got entries.
(ppc64_elf_setup_section_lists): Remove output_bfd param and
no_multi_toc, add add_stub_section and layout_sections_again. Stash
new params in htab. Extract some code to..
(ppc64_elf_start_multitoc_partition): ..here. New function.
(ppc64_elf_next_toc_section): Check for linker script errors. Handle
second pass toc scan.
(merge_got_entries, merge_global_got, reallocate_got): New functions.
(ppc64_elf_reinit_toc): Rename to..
(ppc64_elf_finish_multitoc_partition): ..this.
(ppc64_elf_layout_multitoc): New function.
(ppc64_elf_size_stubs): Delete output_bfd, add_stub_section and
layout_sections_again params.
(ppc64_elf_relocate_section): Handle indirect got entries.
* elf64-ppc.h: Update prototypes. Declare new functions.
ld/
* emultempl/ppc64elf.em (build_toc_list): Report errors from
ppc64_elf_next_toc_section.
(after_allocation): Update for changed function names and params.
Run second pass of multitoc partitioning.
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* ppc.h (DT_PPC_TLSOPT): Define.
* ppc64.h (DT_PPC64_TLSOPT): Define.
bfd/
* elf32-ppc.c (TLS_GET_ADDR_GLINK_SIZE): Define.
(ADD_3_12_2, BEQLR, CMPWI_11_0, LWZ_11_3, LWZ_12_3): Define.
(MR_0_3, MR_3_0): Define.
(struct ppc_elf_link_hash_table): Add no_tls_get_addr_opt.
(ppc_elf_select_plt_layout): Save emit_stub_syms param earlier.
(ppc_elf_tls_setup): Add no_tls_get_addr_opt param and save to hash
table. Check for presense of __tls_get_addr_opt
(allocate_dynrelocs): Increase glink entry size for __tls_get_addr.
(ppc_elf_size_dynamic_sections): Add DT_PPC_TLS_OPT tag.
(write_glink_stub): Add param p.
(ppc_elf_relocate_section): Adjust write_glink_stub call.
(ppc_elf_finish_dynamic_symbol): Emit special glink call stub for
__tls_get_addr.
* elf32-ppc.h (ppc_elf_tls_setup): Update prototype.
* elf64-ppc.c (struct ppc_link_hash_table): Add no_tls_get_addr_opt.
(ppc64_elf_tls_setup): Add no_tls_get_addr_opt param and save to hash
table. Check for presense of __tls_get_addr_opt.
(ppc64_elf_size_dynamic_sections): Add DT_PPC64_TLS_OPT tag.
(LD_R11_0R3, LD_R12_0R3, MR_R0_R3, CMPDI_R11_0, ADD_R3_R12_R13,
BEQLR, MR_R3_R0, MFLR_R11, STD_R11_0R1, BCTRL, LD_R11_0R1,
LD_R2_0R1, MTLR_R11): Define.
(build_tls_get_addr_stub): New function.
(ppc_build_one_stub): Call it.
(ppc_size_one_stub): Add extra size for __tls_get_addr stub.
(ppc64_elf_relocate_section): Don't change nop to ld 2,40(1) for
__tls_get_addr plt call.
* elf64-ppc.h (ppc64_elf_tls_setup): Update prototype.
binutils/
* readelf.c (get_ppc_dynamic_type): Add TLSOPT.
(get_ppc64_dynamic_type): Likewise.
ld/
* emultempl/ppc32elf.em (no_tls_get_addr_opt): New var.
(ppc_before_allocation): Pass to ppc_elf_tls_setup.
(OPTION_NO_TLS_GET_ADDR_OPT): Define. Redefine other options in
terms of previous option.
(PARSE_AND_LIST_LONGOPTS, PARSE_AND_LIST_OPTIONS): Add
--no-tls-get-addr-optimize.
(PARSE_AND_LIST_ARGS_CASES): Handle it.
* emultempl/ppc64elf.em (no_tls_get_addr_opt): New var.
(ppc_before_allocation): Pass to ppc64_elf_tls_setup.
(OPTION_NO_TLS_GET_ADDR_OPT): Define.
(PARSE_AND_LIST_LONGOPTS, PARSE_AND_LIST_OPTIONS): Add
--no-tls-get-addr-optimize.
(PARSE_AND_LIST_ARGS_CASES): Handle it.
ld/testsuite/
* ld-powerpc/tlslib.s: Delete dot-symbol entry syms. Add
__tls_get_addr_opt.
* ld-powerpc/tlslib32.s: Add __tls_get_addr_opt.
* ld-powerpc/oldtlslib.s: New file, old-abi version of tlslib.s.
* ld-powerpc/powerpc.exp: Build old-abi library and use it in
two new link tests.
* ld-powerpc/tlsexe.d: Update for new __tls_get_addr stub.
* ld-powerpc/tlsexe.g, * ld-powerpc/tlsexe.r, *ld-powerpc/tlsexe32.d,
* ld-powerpc/tlsexe32.g, * ld-powerpc/tlsexe32.r,
* ld-powerpc/tlsexetoc.d, * ld-powerpc/tlsexetoc.g,
* ld-powerpc/tlsexetoc.r: Likewise.
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PR 5604
* elf-bfd.h (struct elf_backend_data): Add gc_keep. Remove param
names from others.
(_bfd_elf_gc_keep): Declare.
* elfxx-target.h (elf_backend_gc_keep): Define.
(elfNN_bed): Init new field.
* elflink.c (_bfd_elf_gc_keep): New function.
(bfd_elf_gc_sections): Call gc_keep.
* elf64-ppc.c (elf_backend_gc_keep): Define.
(struct _ppc64_elf_section_data): Move .opd related fields to
a struct so they don't occupy the same storage. Adjust accesses
throughout file.
(ppc64_elf_gc_keep): New function, split out from..
(ppc64_elf_gc_mark_hook): ..here. Don't call _bfd_elf_gc_mark
to mark .opd section, just set gc_mark.
(ppc64_elf_edit_opd): Remove no_opd_opt parm. Don't set opd->adjust
unless we are changing .opd. Test non-NULL opd->adjust at all
accesses throughout file.
* elf64-ppc.h (ppc64_elf_edit_opd): Update prototype.
ld/
PR 5604
* ldlang.c (lang_gc_sections): Move code to set SEC_KEEP on entry
syms to _bfd_elf_gc_keep.
* emultempl/ppc64elf.em (ppc_before_allocation): Don't call
ppc64_elf_edit_opd if no_opd_opt.
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* elf64-ppc.h (ppc64_elf_edit_opd): Update prototype.
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* elf64-ppc.c (struct ppc_link_hash_table): Add no_multi_toc and
multi_toc_needed.
(has_toc_reloc, makes_toc_func_call, call_check_in_progress): Define.
(ppc64_elf_check_relocs): Update references to has_gp_reloc.
(ppc64_elf_setup_section_lists): Add no_multi_toc parm, set htab bit.
(ppc64_elf_next_toc_section): Heed no_multi_toc.
(ppc64_elf_reinit_toc): Set multi_toc_needed.
(toc_adjusting_stub_needed): Rewrite.
(ppc64_elf_next_input_section): Use multi_toc_needed to shortcut
toc tests. Adjust for toc_adjusting_stub_needed changes.
(ppc64_elf_size_stubs): Update references to has_gp_reloc.
* elf64-ppc.h (ppc64_elf_setup_section_lists): Update prototype.
* section.c: Expand comment on backend bits.
* bfd-in2.h: Regenerate.
* libbfd.h: Regenerate.
ld/
* emultempl/ppc64elf.em (no_multi_toc): New var.
(gld${EMULATION_NAME}_finish): Pass to ppc64_elf_setup_section_lists.
(OPTION_NO_MULTI_TOC): Define.
(PARSE_AND_LIST_LONGOPTS): Add --no-multi-toc support.
(PARSE_AND_LIST_OPTIONS, PARSE_AND_LIST_ARGS_CASES): Likewise.
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* elf64-ppc.h (ppc64_elf_edit_toc): Declare.
* elf64-ppc.c (struct ppc_link_hash_entry <adjust_done>): Update
comment.
(struct adjust_toc_info): New.
(adjust_toc_syms, ppc64_elf_edit_toc): New functions.
ld/
* emultempl/ppc64elf.em (no_tls_opt): Rename from notlsopt.
(no_opd_opt, no_toc_opt): New static vars.
(ppc_before_allocation): Don't edit opt if no_opd_opt. Call
ppc64_elf_edit_toc.
(OPTION_NO_OPD_OPT, OPTION_NO_TOC_OPT): Define.
(PARSE_AND_LIST_LONGOPTS): Add no-opd-optimize and no-toc-optimize.
(PARSE_AND_LIST_OPTIONS): Describe new options.
(PARSE_AND_LIST_ARGS_CASES): Handle them.
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entries (where fd_aux overlaps next entry's fd_func).
Add non_overlapping argument, use it.
(ppc64_elf_check_relocs, ppc64_elf_gc_mark_hook, adjust_opd_syms,
ppc64_elf_size_stubs, ppc64_elf_relocate_section,
ppc64_elf_output_symbol_hook): Use address / 8 instead of address / 24
as indexes into opd_sym_map/opd_adjust array.
* elf64-ppc.h (ppc64_elf_edit_opd): Adjust prototype.
* emultempl/ppc64elf.em (non_overlapping_opd): New variable.
(ppc_before_allocation): Pass it to ppc64_elf_edit_opd).
(OPTION_NON_OVERLAPPING_OPD): Define.
(PARSE_AND_LIST_OPTIONS, PARSE_AND_LIST_ARGS_CASES): Add
--non-overlapping-opd option.
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* elf64-ppc.c (struct ppc_link_hash_entry): Add was_undefined.
(struct ppc_link_hash_table): Remove no_multi_toc, multi_toc_needed.
Make emit_stub_syms, stub_error and has_14bit_branch bit-fields.
Add twiddled_syms.
(link_hash_newfunc): Init was_undefined.
(add_symbol_adjust): Don't set undefined dot symbols to defweak;
Use undefweak instead.
(ppc64_elf_check_directives): Fix undefs chain.
(ppc64_elf_next_toc_section): Remove no_multi_toc and multi_toc_needed
references.
(ppc64_elf_size_stubs): Adjust for add_symbol_adjust change.
(undo_symbol_twiddle, ppc64_elf_restore_symbols): New functions.
* elf64-ppc.h (ppc64_elf_restore_symbols): Declare.
ld/
* emultempl/ppc64elf.em (gld${EMULATION_NAME}_finish): Call
ppc64_elf_restore_symbols.
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* elf-bfd.h (_bfd_elf_gc_mark): Declare.
* elflink.c (elf_link_input_bfd): Formatting.
(_bfd_elf_gc_mark): Rename from elf_gc_mark and make global. Adjust
all callers.
* elf64-ppc.c (struct ppc_link_hash_entry): Remove is_entry.
(link_hash_newfunc): Don't set it.
(ppc64_elf_copy_indirect_symbol): Nor copy it.
(ppc64_elf_mark_entry_syms): Delete.
(ppc64_elf_gc_mark_hook): Mark entry syms here. Also mark opd
sections. Use get_opd_info.
* elf64-ppc.h (ppc64_elf_mark_entry_syms): Delete.
ld/
* emultempl/ppc64elf.em (ppc_after_open): Delete.
(LDEMUL_AFTER_OPEN): Don't define.
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* bfd-in2.h: Regenerate.
* elf-bfd.h (struct elf_link_tls_segment): Delete.
(struct elf_link_hash_table): Add tls_sec and tls_size.
* elf.c (_bfd_elf_link_hash_table_init): Init tls_sec and tls_size.
* elflink.c (_bfd_elf_tls_setup): New function.
* elflink.h (struct elf_final_link_info): Remove first_tls_sec.
(elf_bfd_final_link): Don't set first_tls_sec here. Update code
saving tls segment info, round segment size up.
(elf_link_output_extsym): Adjust code using tls segment info.
(elf_link_input_bfd): Likewise.
* elf32-i386.c (dtpoff_base, tpoff): Likewise.
* elf32-s390.c (dtpoff_base, tpoff): Likewise.
* elf32-sh.c (dtpoff_base, tpoff): Likewise.
* elf32-sparc.c (dtpoff_base, tpoff): Likewise.
* elf64-s390.c (dtpoff_base, tpoff): Likewise.
* elf64-x86-64.c (dtpoff_base, tpoff): Likewise.
* elfxx-ia64.c (elfNN_ia64_tprel_base): Likewise.
(elfNN_ia64_dtprel_base): Likewise.
* elf64-alpha.c (alpha_get_dtprel_base): Likewise.
(alpha_get_tprel_base): Likewise.
(struct alpha_relax_info): Remove tls_segment.
(elf64_alpha_relax_got_load): Adjust invocation of
alpha_get_dtprel_base and alpha_get_tprel_base.
(elf64_alpha_relax_tls_get_addr): Likewise.
(elf64_alpha_relax_section): Likewise.
(elf64_alpha_relocate_section): Likewise.
(elf64_alpha_relax_find_tls_segment): Delete.
* elf32-ppc.c (struct ppc_elf_link_hash_table): Remove tls_sec.
(ppc_elf_tls_setup): Call _bfd_elf_tls_setup. Return section.
(ppc_elf_relocate_section): Adjust to use elf.tls_sec.
* elf32-ppc.h (ppc_elf_tls_setup): Update.
* elf64-ppc.c (struct ppc_link_hash_table): Remove tls_sec.
(ppc64_elf_tls_setup): Call _bfd_elf_tls_setup. Return section.
(ppc64_elf_tls_optimize): Adjust to use elf.tls_sec.
(ppc64_elf_relocate_section): Likewise.
* elf64-ppc.h (ppc64_elf_tls_setup): Update.
* emultempl/elf32.em (gld${EMULATION_NAME}_before_allocation): Call
_bfd_elf_tls_setup.
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(struct ppc64_elf_obj_tdata): New.
(ppc64_elf_tdata, ppc64_tlsld_got): Define.
(ppc64_elf_mkobject): New function.
(struct got_entry): Add "owner". Move "tls_type".
(struct ppc_link_hash_table): Delete "relgot", "tlsld_got".
(ppc64_elf_init_stub_bfd): New function.
(create_got_section): Create header .got in dynobj. Create .got
and .rela.got in each bfd. Stash pointers in ppc64_elf_obj_tdata.
(ppc64_elf_create_dynamic_sections): Don't call create_got_section.
Look for dynobj .got, and test it.
(ppc64_elf_copy_indirect_symbol): Adjust for changed got.
(update_local_sym_info): Likewise.
(ppc64_elf_check_relocs): Likewise.
(ppc64_elf_gc_sweep_hook): Likewise.
(ppc64_elf_tls_optimize): Likewise.
(allocate_dynrelocs): Likewise.
(ppc64_elf_size_dynamic_sections): Likewise.
(ppc64_elf_relocate_section): Likewise.
(ppc64_elf_next_toc_section): Update comment.
(toc_adjusting_stub_needed): Remove unneeded cast.
(ppc64_elf_build_stubs): Check for stub sections in stub bfd by
testing section flags.
(ppc64_elf_build_stubs): Likewise.
(ppc64_elf_size_stubs): Likewise. Remove stub_bfd param.
(ppc64_elf_finish_dynamic_sections): Write out got sections.
(func_desc_adjust): Copy over dynamic info for undef weaks.
* elf64-ppc.h (ppc64_elf_init_stub_bfd): Declare.
(ppc64_elf_size_stubs): Update prototype.
* elflink.h (elf_link_sort_relocs): Use link_orders to find reldyn
input sections rather than scanning dynobj.
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prototypes and casts. Replace PTR with void *. Format copyright.
Mention ABI links.
(struct ppc_link_hash_table): Rename sgot, srelgot, splt, srelplt,
sdynbss, srelbss, sglink, sbrlt and srelbrlt to got, relgot .. relbrlt.
(ppc_type_of_stub): Make r_type an enum.
(ppc64_elf_size_stubs): Likewise.
* elf64-ppc.h: Remove PARAMS macro.
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(ppc64_elf_info_to_howto): Likewise.
(ppc64_elf_build_stubs): Add "stats" param, and print statistics.
* elf64-ppc.h (ppc64_elf_build_stubs): Adjust prototype.
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(ppc64_elf_next_input_section): Use it here to set has_gp_reloc.
Return error condition.
(ppc64_elf_size_stubs): Restrict toc adjusting stubs to sections
that have has_gp_reloc set.
(struct ppc_link_hash_table): Add stub_count.
(ppc_build_one_stub): Increment it.
(ppc64_elf_link_hash_table_create): zmalloc rather than clearing
individual fields.
* elf64-ppc.h (ppc64_elf_next_input_section): Update prototype.
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elfxx-target.h so that we can use elf_backend_got_header_size.
(ELF_MACHINE_ALT1, ELF_MACHINE_ALT2): Delete.
(GLINK_CALL_STUB_SIZE): Modify. Define new glink call stub and
associated macros.
(ppc64_elf_howto_raw <GOT_TPREL16_DS, GOT_TPREL16_LO_DS>): Correct
dst_mask.
(enum ppc_stub_type): Add ppc_stub_long_branch_r2off and
ppc_stub_plt_branch_r2off.
(struct ppc_stub_hash_entry): Reorganize.
(struct ppc_link_hash_table): Add no_multi_toc, multi_toc_needed,
toc_curr, toc_off and emit_stub_syms.
(ppc64_elf_link_hash_table_create): Init them.
(ppc_stub_name): Correct string size.
(ppc64_elf_check_relocs): Set has_gp_reloc on GOT and TOC relocs.
(ppc64_elf_size_dynamic_sections): Set no_multi_toc if GOT entries
used.
(ppc_type_of_stub): Tweak root.type test.
(build_plt_stub): Remove glink code. Adjust for insn macro changes.
(ppc_size_one_stub): Handle ppc_stub_long_branch_r2off and
ppc_stub_plt_branch_r2off.
(ppc_build_one_stub): Likewise. Fix var shadowing. Correct addis,addi
range test. Use toc_off to calculte r2 values. Handle emit_stub_syms.
(ppc64_elf_setup_section_lists): Remove htab creator flavour test.
Initialize elf_gp and toc_curr.
(ppc64_elf_next_toc_section, ppc64_elf_reinit_toc): New functions.
(ppc64_elf_next_input_section): Set toc_off.
(group_sections): Ensure groups have the same TOC.
(ppc64_elf_size_stubs): Check whether we need a TOC adjusting stub.
(ppc64_elf_build_stubs): Add emit_stub_syms param, and stash in htab.
Build new glink stub.
(ppc64_elf_relocate_section): Handle multiple TOCs. Fix comments.
(ppc64_elf_finish_dynamic_sections): Adjust DT_PPC64_GLINK.
* elf64-ppc.h (ppc64_elf_build_stubs): Update prototype.
(ppc64_elf_next_toc_section, ppc64_elf_reinit_toc): Declare.
* section.c (struct sec): Rename flag12 to has_gp_reloc.
(STD_SECTION): Update.
* ecoff.c (bfd_debug_section): Update comment.
* bfd-in2.h: Regenerate.
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(TLS_GD): ..define this instead and update all uses.
(TLS_TPRELGD): Define.
(ppc64_elf_link_hash_table_create): Tweak initialization of
init_refcount and init_offset.
(ppc64_elf_check_relocs): Add one extra element to t_symndx array.
Mark second slot of GD or LD toc entries.
(get_tls_type): Return an int. Distinguish toc GD and LD entries
from other tls types.
(ppc64_elf_tls_setup): New function, split out from..
(ppc64_elf_tls_optimize): ..here. Don't optimize when symbols are
defined in a dynamic object. Fix LD optimization. Don't set TLS_TPREL
on GD->IE optimization, use TLS_TPRELGD instead. Use get_tls_type
return value to properly decide whether toc GD and LD entries can
optimize away __tls_get_addr call. Check next reloc after DTPMOD64
to determine GD or LD rather than looking at TLS_LD flag. Don't
attempt to adjust got entry tls_type here..
(allocate_dynrelocs): ..instead, adjust got entry tls_type here, and
look for possible merges.
(ppc64_elf_size_dynamic_sections): Adjust local got entries for
optimization.
(ppc64_elf_size_stubs): Tweak __tls_get_addr fudge.
(ppc64_elf_relocate_section): Rename some vars to better reflect usage.
Make use of return value from get_tls_type to properly detect GD and
LD optimizations. Split tlsld/gd hi/ha from lo/ds case. Don't
handle tls_get_addr removal when looking at REL24 relocs, do it when
looking at the previous reloc. Check reloc after DTPMOD64 to determine
GD or LD.
* elf64-ppc.h (ppc64_elf_tls_setup): Declare.
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* libbfd.h: Regenerate.
* bfd-in2.h: Regenerate.
* elf64-ppc.c (TP_OFFSET, DTP_OFFSET): Declare.
(ppc64_elf_howto_raw): Add TLS howto's. Adjust R_PPC64_NONE to be
against a 32 bit field.
(ppc64_elf_reloc_type_lookup): Handle TLS relocs.
(_ppc64_elf_section_data): Add t_symndx and comments.
(ppc64_elf_section_data): Use elf_section_data macro.
(ppc64_elf_new_section_hook): American spelling.
(struct got_entry, struct plt_entry): New.
(MUST_BE_DYN_RELOC): Rename from IS_ABSOLUTE_RELOC.
(struct ppc_stub_hash_entry): Add "addend" field.
(struct ppc_link_hash_entry): Add "tls_type".
(TLS_TLS, TLS_GD_LD, TLS_LD, TLS_TPREL, TLS_DTPREL,
TLS_EXPLICIT): Define.
(struct ppc_link_hash_table): Add tls_sec, tls_get_addr, tlsld_got.
(link_hash_newfunc): Init new fields.
(ppc64_elf_link_hash_table_create): Likewise. Set init_relcount and
init_offset to NULL.
(ppc64_elf_copy_indirect_symbol): Copy got and plt info. Don't call
_bfd_elf_link_hash_copy_indirect, rather insert relevant code from
there.
(update_local_sym_info, update_plt_info): New functions.
(ppc64_elf_check_relocs): Use them. Handle TLS relocs. Adjust GOT
handling to use got.glist rather than got.refcount. Likewise for PLT.
(ppc64_elf_gc_sweep_hook): Handle TLS relocs, new GOT and PLT lists.
(func_desc_adjust): Adjust for new PLT list.
(ppc64_elf_adjust_dynamic_symbol): Likewise.
(get_sym_h, get_tls_type): New functions.
(ppc64_elf_edit_opd): Remove unused variable. Use get_sym_h.
(ppc64_elf_tls_optimize): New function.
(allocate_dynrelocs): Adjust for new PLT and GOT lists. Allocate
TLS relocs.
(ppc64_elf_size_dynamic_sections): Likewise.
(ppc_type_of_stub): Adjust for new PLT list.
(ppc_build_one_stub): Likewise.
(ppc64_elf_size_stubs): Likewise. Use get_sym_h. Treat __tls_get_addr
calls specially.
(ppc64_elf_relocate_section): Adjust for new GOT and PLT lists. Handle
TLS relocs. Report local syms using bfd_elf_local_sym_name. Don't
init GOT entries that have a reloc. Generate GOT relocs here..
(ppc64_elf_finish_dynamic_symbol): ..not here. Adjust for PLT list.
* elf64-ppc.h (ppc64_elf_tls_optimize): Declare.
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comparisons of bfd_boolean vars with TRUE/FALSE. Formatting.
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relocatable link too.
(elf_link_input_bfd): When emitting relocs, adjust offsets for
eh_frame and stab sections. Zap deleted relocs.
(elf_reloc_symbol_deleted_p): Return true for zero r_symndx.
(elf_bfd_discard_info): Run for relocatable link too.
* elf64-ppc.c (ppc64_elf_edit_opd): Rename from edit_opd. Make global.
Handle ld -r case.
(ppc64_elf_size_dynamic_sections): Don't call edit_opd from here.
* elf64-ppc.h (ppc64_elf_edit_opd): Declare.
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examining to gc_mark_hook, rather than the bfd.
(elf_gc_sections): Adjust.
* elf-bfd.h (struct elf_backend_data <gc_mark_hook>): Likewise.
* elf-m10300.c (mn10300_elf_gc_mark_hook): Likewise.
* elf32-arm.h (elf32_arm_gc_mark_hook): Likewise.
* elf32-avr.c (elf32_avr_gc_mark_hook): Likewise.
* elf32-cris.c (cris_elf_gc_mark_hook): Likewise.
* elf32-d10v.c (elf32_d10v_gc_mark_hook): Likewise.
* elf32-fr30.c (fr30_elf_gc_mark_hook): Likewise.
* elf32-hppa.c (elf32_hppa_gc_mark_hook): Likewise.
* elf32-i386.c (elf_i386_gc_mark_hook): Likewise.
* elf32-m32r.c (m32r_elf_gc_mark_hook): Likewise.
* elf32-m68k.c (elf_m68k_gc_mark_hook): Likewise.
* elf32-mcore.c (mcore_elf_gc_mark_hook): Likewise.
* elf32-openrisc.c (openrisc_elf_gc_mark_hook): Likewise.
* elf32-ppc.c (ppc_elf_gc_mark_hook): Likewise.
* elf32-s390.c (elf_s390_gc_mark_hook): Likewise.
* elf32-sh.c (sh_elf_gc_mark_hook): Likewise.
* elf32-sparc.c (elf32_sparc_gc_mark_hook): Likewise.
* elf32-v850.c (v850_elf_gc_mark_hook): Likewise.
* elf32-vax.c (elf_vax_gc_mark_hook): Likewise.
* elf32-xstormy16.c (xstormy16_elf_gc_mark_hook): Likewise.
* elf64-mmix.c (mmix_elf_gc_mark_hook): Likewise.
* elf64-ppc.c (ppc64_elf_gc_mark_hook): Likewise.
* elf64-s390.c (elf_s390_gc_mark_hook): Likewise.
* elf64-sh64.c (sh_elf64_gc_mark_hook): Likewise.
* elfxx-mips.c (_bfd_mips_elf_gc_mark_hook): Likewise.
* elfxx-mips.h (_bfd_mips_elf_gc_mark_hook): Likewise.
* elf64-x86-64.c (elf64_x86_64_gc_mark_hook): Likewise.
* elf32-frv.c (elf32_frv_gc_mark_hook): Likewise. Also remove
redundant local sym tests.
* elf64-ppc.c (struct ppc_link_hash_entry): Add is_entry.
(link_hash_newfunc): Init is_entry.
(ppc64_elf_copy_indirect_symbol): Copy is_entry.
(ppc64_elf_link_hash_table_create): Init all_local_syms.
(create_linkage_sections): Use bfd_make_section_anyway rather than
bfd_make_section.
(ppc64_elf_mark_entry_syms): New function.
(ppc64_elf_check_relocs): Don't bother testing elf_bad_symtab. Set
up opd entry to function section map.
(ppc64_elf_gc_mark_hook): Special case opd section relocs, and
relocs that reference the opd section.
(edit_opd): New function.
(ppc64_elf_size_dynamic_sections): Call get_local_syms and edit_opd.
(ppc64_elf_setup_section_lists): Don't calculate htab->bfd_count here.
(get_local_syms): Do so here. Exit if we already have local syms.
Remove bogus comment imported from elf32-hppa.c. Don't attempt to
read local syms on non-ELF input.
(ppc64_elf_size_stubs): Call _bfd_elf64_link_read_relocs rather
than duplicating it's function here. Adjust free of internal
relocs to suit.
(ppc64_elf_relocate_section): Adjust local syms in opd section.
* elf64-ppc.h (ppc64_elf_mark_entry_syms): Declare.
* elf32-hppa.c (elf32_hppa_size_stubs): Call
_bfd_elf32_link_read_relocs rather than duplicating it's function
here. Adjust free of internal relocs to suit.
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(ppc64_elf_ha_reloc): New function.
(ppc64_elf_brtaken_reloc): New function.
(ppc64_elf_sectoff_reloc): New function.
(ppc64_elf_sectoff_ha_reloc): New function.
(ppc64_elf_toc_reloc): New function.
(ppc64_elf_toc_ha_reloc): New function.
(ppc64_elf_toc64_reloc): New function.
(ppc64_elf_unhandled_reloc): New function.
(ppc64_elf_howto_raw): Use the above.
<R_PPC64_RELATIVE>: Mark pc_relative, pcrel_offset.
<R_PPC64_SECTOFF>: Not pc_relative or pcrel_offset. Fix dst_mask.
<R_PPC64_SECTOFF_DS>: Likewise.
(IS_ABSOLUTE_RELOC): Update.
(struct ppc_link_hash_table): Add have_undefweak.
(ppc64_elf_link_hash_table_create): Init.
(func_desc_adjust): Set have_undefweak.
(ppc64_elf_func_desc_adjust): Call func_desc_adjust earlier. Only
add the .sfpr blr when have_undefweak.
(ppc64_elf_setup_section_lists): Check hash table flavour.
(ppc64_elf_next_input_section): Move output_section->owner test to
ppc64elf.em.
(ppc64_elf_set_toc): Rename to ppc64_elf_toc, remove info param
and relocatable test. Return TOCstart and don't set elf_gp.
(ppc64_elf_relocate_section): Correct BRTAKEN/BRNTAKEN branch
offset calculation. Add assert on weak sym branch tweaks.
* elf64-ppc.h (ppc64_elf_set_toc): Delete.
(ppc64_elf_toc): Declare.
(ppc64_elf_next_input_section): Update.
* emultempl/ppc64elf.em (gld${EMULATION_NAME}_after_allocation):
Adjust for ppc64_elf_set_toc change. #include libbfd.h.
(build_section_lists): Do output_section tests here.
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(ppc64_elf_relocate_section): Use them. Don't look for plt calls
on R_PPC64_ADDR24 relocs. Require a nop or no link reg on plt
call branches. Correct undefined weak destination.
(ppc64_elf_func_desc_adjust): Always create at least one blr in
.sfpr, and correct case where either only savef* or restf* is
needed.
Long branch stubs, multiple stub sections.
* elf64-ppc.h (ppc64_elf_setup_section_lists): Declare.
(ppc64_elf_next_input_section): Declare.
* elf64-ppc.c: Move linker-only prototypes.
(STUB_SUFFIX): Define.
(enum ppc_stub_type): New.
(struct ppc_stub_hash_entry): New.
(struct ppc_branch_hash_entry): New.
(struct ppc_link_hash_entry): Add stub_cache, oh.
(struct ppc_link_hash_table): Add stub_hash_table etc. Remove
sstub. Add sbrlt, srelbrlt, has_14bit_branch, stub_iteration.
Rename plt_overflow to stub_error.
(ppc_stub_hash_lookup): Define.
(ppc_branch_hash_lookup): Define.
(stub_hash_newfunc): New function.
(branch_hash_newfunc): New function.
(link_hash_newfunc): Init new fields.
(ppc64_elf_link_hash_table_create): Likewise.
(ppc64_elf_link_hash_table_free): New function.
(ppc_stub_name): New function.
(ppc_get_stub_entry): New function.
(ppc_add_stub): New function.
(create_linkage_sections): Use bfd_make_section_anyway. Create
.branch_lt and .rela.branch_lt sections. Don't create .stub.
(ppc64_elf_check_relocs): Set has_14bit_branch on R_PPC64_REL14*,
and set up for plt call stubs. Link func and func desc syms.
(ppc64_elf_gc_sweep_hook): Handle REL14* as per REL24.
(func_desc_adjust): Avoid hash lookup when func desc sym available
via shortcut, and set links when processing.
(ppc64_elf_hide_symbol): Likewise.
(allocate_dynrelocs): Don't allocate stub section here.
(ppc64_elf_size_dynamic_sections): Handle sbrlt and srelbrlt.
Remove sstub code.
(ppc_type_of_stub): New function.
(build_one_stub): Delete.
(ppc_build_one_stub): New function.
(ppc_size_one_stub): New function.
(ppc64_elf_setup_section_lists): New function.
(ppc64_elf_next_input_section): New function.
(group_sections): New function.
(get_local_syms): New function.
(ppc64_elf_size_stubs): Rewrite.
(ppc64_elf_build_stubs): Rewrite.
(ppc64_elf_relocate_section): Look up stub entry for REL24
relocs. Don't propagate REL14* to dynamic objects. Look for long
branch stubs if REL14* or REL24 relocs won't reach.
(bfd_elf64_bfd_link_hash_table_free): Define.
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when plt_not_loaded.
* elf64-ppc.c (ppc64_elf_create_dynamic_sections): No need to
clear .plt SEC_CODE here. Create .stub and correct .glink flags.
(PLT_INITIAL_ENTRY_SIZE): Set to 24.
(ppc64_elf_glink_code): Delete.
(PPC64_ELF_GLINK_SIZE): Delete.
(ADDIS_R12_R2, STD_R2_40R1, LD_R11_0R12, LD_R2_0R12, MTCTR_R11,
BCTR, ADDIS_R12_R12_1, LD_R2_40R1, NOP, LI_R0_0, B_DOT, LIS_R0_0,
ORI_R0_R0_0): Define.
(PLT_CALL_STUB_SIZE, GLINK_CALL_STUB_SIZE): Define.
(struct ppc_link_hash_table): Add sstub and plt_overflow.
(ppc64_elf_link_hash_table_create): Init them.
(ppc64_elf_check_relocs <R_PPC64_REL24>): Refcount .plt entry.
Don't copy to shared lib.
(ppc64_elf_check_relocs): Call bfd_set_error on errors.
(ppc64_elf_gc_sweep_hook <R_PPC64_REL24>): Sweep plt refcount.
(allocate_dynrelocs <plt>): Don't change function sym here. Make
room for .stub and .glink code.
(ppc64_elf_size_dynamic_sections): Handle .stub. Make entry for
DT_PPC64_GLINK.
(ppc64_elf_final_link): Rename to ppc64_elf_set_toc. Don't call
bfd_elf64_bfd_final_link.
(bfd_elf64_bfd_final_link): Don't define.
(ppc64_elf_size_stubs): New.
(build_plt_stub): New.
(build_one_stub): New.
(ppc64_elf_build_stubs): New.
(ppc64_elf_relocate_section <toc relocs>): Remove assert.
(ppc64_elf_relocate_section): Don't copy R_PPC64_REL24 relocs.
(ppc64_elf_finish_dynamic_symbol): Don't build stubs here. Set
DT_PPC64_GLINK entry. Tweak DT_PLTGOT, DT_JMPREL, DT_PLTRELSZ in
case output sections not separate. Adjust DT_RELASZ to not
include plt relocs. Set reserved got entry. Set got and plt
entry size.
(elf_backend_got_header_size): Set to 8.
* elf64-ppc.h: New file.
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