Three pppc32 ld tests fail when spe support is included in the linker
due to this snippet in ld/emulparams/elf32ppc.sh.
if grep -q 'ld_elf32_spu_emulation' ldemul-list.h; then
DATA_START_SYMBOLS="${RELOCATING+*crt1.o(.data .data.* .gnu.linkonce.d.*)
PROVIDE (__spe_handle = .);
*(.data.spehandle)
. += 4 * (DEFINED (__spe_handle) || . != 0);}"
fi
* testsuite/ld-powerpc/tlsexe32.r: Pass with .data section present.
* testsuite/ld-powerpc/tlsexe32no.r: Likewise.
* testsuite/ld-powerpc/tlsso32.r: Likewise.
This patch adds some --no-tls-optimize tests and performs some of the
existing dynamic tests with tls markers in order to catch any
regression in PLT counting.
* testsuite/ld-powerpc/tlsexe.r: Adjust for added TLSMARK symbol.
* testsuite/ld-powerpc/tlsexe32.r: Likewise.
* testsuite/ld-powerpc/tlsso.r: Likewise.
* testsuite/ld-powerpc/tlsso32.r: Likewise.
* testsuite/ld-powerpc/tls32no.d,
* testsuite/ld-powerpc/tls32no.g: New test files.
* testsuite/ld-powerpc/tlsexe32no.d,
* testsuite/ld-powerpc/tlsexe32no.g,
* testsuite/ld-powerpc/tlsexe32no.r: New test files.
* testsuite/ld-powerpc/tlsexeno.d,
* testsuite/ld-powerpc/tlsexeno.g,
* testsuite/ld-powerpc/tlsexeno.r: New test files.
* testsuite/ld-powerpc/tlsexetocno.d,
* testsuite/ld-powerpc/tlsexetocno.g: New test files.
* testsuite/ld-powerpc/tlsno.d,
* testsuite/ld-powerpc/tlsno.g: New test files.
* testsuite/ld-powerpc/tlstocno.d,
* testsuite/ld-powerpc/tlstocno.g: New test files.
* testsuite/ld-powerpc/powerpc.exp: Run new tests.
This is in preparation for the next patch adding Spectre variant 2
mitigation for PowerPC and PowerPC64. Besides tidying code involved
in stub output (to reduce the number of places where bctr is output),
the patch adds some user visible features:
1) PowerPC64 ELFv2 global entry stubs now are aligned under the
control of --plt-align, with a default alignment of 32 bytes.
2) PowerPC64 __glink_PLTresolve is no longer padded out with nops.
3) PowerPC32 PLT stubs are aligned under the control of --plt-align,
with the default alignment being 16 bytes as before.
4) The PowerPC32 branch/nop table emitted before __glink_PLTresolve
is now smaller in many cases. It was sized incorrectly when the
__tls_get_addr_opt stub was used, and unnecessarily included space
for local ifuncs.
bfd/
* elf32-ppc.c (GLINK_ENTRY_SIZE): Add parameters, handle
__tls_get_addr_opt, and alignment sizing.
(TLS_GET_ADDR_GLINK_SIZE): Delete.
(is_nonpic_glink_stub): Don't use GLINK_ENTRY_SIZE.
(ppc_elf_get_synthetic_symtab): Recognize stubs spaced at 4, 6,
or 8 insns.
(ppc_elf_link_hash_table_create): Init new ppc_elf_params field.
(allocate_dynrelocs): Use new GLINK_ENTRY_SIZE.
(ppc_elf_size_dynamic_sections): Likewise. Size branch table
by PLT reloc count.
(write_glink_stub): Handle __tls_get_addr_opt stub.
Pad out to size given by GLINK_ENTRY_SIZE.
(ppc_elf_relocate_section): Adjust write_glink_stub call.
(ppc_elf_finish_dynamic_symbol): Likewise.
(ppc_elf_finish_dynamic_sections): Write PLTresolve without using
insn array since so many need rewriting.
* elf32-ppc.h (struct ppc_elf_params): Add plt_stub_align.
* elf64-ppc.c (GLINK_PLTRESOLVE_SIZE): Rename from
GLINK_CALL_STUB_SIZE. Add htab param and evaluate to size without
nops. Adjust all uses.
(ppc64_elf_get_synthetic_symtab): Don't use GLINK_CALL_STUB_SIZE
in glink_vma calculation.
(struct ppc_link_hash_table): Add global_entry section pointer.
(create_linkage_sections): Create separate section for global
entry stubs.
(PPC_LO, PPC_HI, PPC_HA): Move earlier.
(size_global_entry_stubs): Handle sizing for aligned stubs.
(ppc64_elf_size_dynamic_sections): Handle global_entry alloc,
and don't stash end of glink branch table in rawsize.
(ppc_build_one_stub): Rewrite stub size calculations.
(build_global_entry_stubs): Use new section.
(ppc64_elf_build_stubs): Don't pad __glink_PLTresolve with nops.
Build lazy link stubs out to end of section. Build global entry
stubs in new section.
gold/
* options.h (plt_align): Support for PowerPC32 too.
* powerpc.cc (Stub_table::stub_align): Heed --plt-align for 32-bit.
(Stub_table::plt_call_size, branch_stub_size): Tidy.
(Stub_table::plt_call_align): Implement using stub_align.
(Output_data_glink::global_entry_align): New function.
(Output_data_glink::global_entry_off): New function.
(Output_data_glink::global_entry_address): Use global_entry_off.
(Output_data_glink::pltresolve_size): New function, replacing
pltresolve_size_ constant. Update all uses.
(Output_data_glink::add_global_entry): Align offset.
(Output_data_glink::set_final_data_size): Use global_entry_align.
(Stub_table::do_write): Don't pad __glink_PLTrelsolve with nops.
Tidy stub output. Use global_entry_off.
ld/
* emultempl/ppc32elf.em (params): Init new field.
(enum ppc32_opt): New enum to define OPTION_* values. Add
OPTION_PLT_ALIGN and OPTION_NO_PLT_ALIGN.
(PARSE_AND_LIST_LONGOPTS): Handle new options.
(PARSE_AND_LIST_ARGS_CASES): Likewise.
(PARSE_AND_LIST_OPTIONS): Likewise. Break up help output.
* emultempl/ppc64elf.em (ppc_add_stub_section): Init alignment
correctly for negative --plt-stub-align.
* testsuite/ld-powerpc/elfv2exe.d,
* testsuite/ld-powerpc/elfv2so.d,
* testsuite/ld-powerpc/relbrlt.d,
* testsuite/ld-powerpc/relbrlt.s,
* testsuite/ld-powerpc/tlsexe.d,
* testsuite/ld-powerpc/tlsexe.r,
* testsuite/ld-powerpc/tlsexe32.d,
* testsuite/ld-powerpc/tlsexe32.g,
* testsuite/ld-powerpc/tlsexe32.r,
* testsuite/ld-powerpc/tlsexetoc.d,
* testsuite/ld-powerpc/tlsexetoc.r,
* testsuite/ld-powerpc/tlsopt5_32.d,
* testsuite/ld-powerpc/tlsso.d,
* testsuite/ld-powerpc/tlstocso.d: Update for changed stub order.
It was reasonable to mark PT_PHDR segment with PF_X for compatibility
with UnixWare and Solaris linkers 20 years ago. But it is inappropriate
today when the primary OS of GNU ld is Linux. This patch removes PF_X
from PT_PHDR segment as gold does.
Tested natively on Linux/x86 as well as crosss-binutils for alpha-linux,
ia64-linux, powerpc64-linux, powerpc-linux, s390-linux, s390x-linux,
sparc64-linux and sparc-linux.
bfd/
PR ld/22423
* elf.c (_bfd_elf_map_sections_to_segments): Remove PF_X from
PT_PHDR segment.
ld/
PR ld/22423
* testsuite/ld-alpha/tlsbin.rd: Replace "R E " with "R +" for
PT_PHDR segment.
* testsuite/ld-alpha/tlsbinr.rd: Likewise.
* testsuite/ld-ia64/tlsbin.rd: Likewise.
* testsuite/ld-powerpc/tlsexe.r: Likewise.
* testsuite/ld-powerpc/tlsexe32.r: Likewise.
* testsuite/ld-powerpc/tlsexetoc.r: Likewise.
* testsuite/ld-s390/tlsbin.rd: Likewise.
* testsuite/ld-s390/tlsbin_64.rd: Likewise.
* testsuite/ld-sparc/tlssunbin32.rd: Likewise.
* testsuite/ld-sparc/tlssunbin64.rd: Likewise.
* testsuite/ld-elf/pr22423.d: New test.
* elflink.c (elf_link_input_bfd): Provide a file symbol for
each input file with local syms, if the input lacks such.
(bfd_elf_final_link): Add a file symbol to mark end of locals
for which we can associate with input files.
(struct elf_final_link_info): Add filesym_count field.
(struct elf_outext_info): Add need_second_pass and second_pass.
(elf_link_output_extsym): Detect symbols defined in the output
file, emit them on second pass over locals.
ld/testsuite/
Update to suit added STT_FILE symbols.
PR ld/2723
* elflink.c (bfd_elf_final_link): Don't output section symbols
for special ELF sections.
ld/testsuite/
Update for removal of some section syms.
* elf32-ppc.c (ppc_elf_create_linker_section): Set SEC_LINKER_CREATED
on section. Correct comment, and add FIXME.
(ppc_elf_additional_program_headers): Don't bump header count for
interp. Test SEC_ALLOC, not SEC_LOAD, and don't test size.
(ppc_elf_size_dynamic_sections): Don't strip sdata and sdata2, but
do allocate memory if they need it.
ld/
* emulparams/elf32ppclinux.sh (OTHER_READWRITE_SECTION): Delete.
(OTHER_RELRO_SECTIONS): Set this instead.
ld/testsuite/
* ld-powerpc/tlsexe32.d: Update.
* ld-powerpc/tlsexe32.g: Update.
* ld-powerpc/tlsexe32.r: Update.
* ld-powerpc/tlsexe32.t: Update.
* ld-powerpc/tlsso32.d: Update.
* ld-powerpc/tlsso32.g: Update.
* ld-powerpc/tlsso32.r: Update.
* ld-powerpc/tlsso32.t: Update.
