Power10 stub selection
This patch better supports mixing of power10 and non-power10 code, as might be seen in a cpu-optimized library using ifuncs to select functions optimized for a given cpu. Using -Wl,--no-power10-stubs isn't that good in this situation since non-power10 notoc stubs are slower and larger than the power10 variants, which you'd like to use on power10 code paths. With this change, power10 pc-relative code that makes calls marked @notoc uses power10 stubs if stubs are necessary, and other calls use non-power10 instructions in stubs. This will mean that if gcc is generating code for -mcpu=power10 but with pc-rel disabled then you'll get the older stubs even on power10 (unless you force with -Wl,--power10-stubs). That shouldn't be too big a problem: stubs that use r2 are reasonable. It's just the ones that set up addressing using "mflr 12; bcl 20,31,.+4; mflr 11; mtlr 12" that should be avoided if possible. bfd/ * elf64-ppc.c (struct ppc_link_hash_table): Add has_power10_relocs. (select_alt_stub): New function. (ppc_get_stub_entry): Use it here. (ppc64_elf_check_relocs): Set had_power10_relocs rather than power10_stubs. (ppc64_elf_size_stubs): Clear power10_stubs here instead. Don't merge notoc stubs with other varieties when power10_stubs is "auto". Instead dup the stub hash table entry. (plt_stub_size, ppc_build_one_stub, ppc_size_one_stub): Adjust tests of power10_stubs. ld/ * emultempl/ppc64elf.em (power10-stubs): Accept optional "auto" arg. * ld.texi (power10-stubs): Update. * testsuite/ld-powerpc/callstub-1.d: Force --power10-stubs. * testsuite/ld-powerpc/callstub-2.d: Relax branch offset comparison. * testsuite/ld-powerpc/callstub-4.d: New test. * testsuite/ld-powerpc/notoc.d: Force --no-power10-stubs. * testsuite/ld-powerpc/notoc3.d, * testsuite/ld-powerpc/notoc3.s, * testsuite/ld-powerpc/notoc3.wf: New test. * testsuite/ld-powerpc/powerpc.exp: Run new tests. Pass --no-power10-stubs for notoc link. (cherry picked from commit e10a07b32dc1faed25b5bbcbbc47d68e2ff537b9)
This commit is contained in:
Alan Modra
parent
c6e3e5b207
commit
d349c8e245
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@ -1,3 +1,16 @@
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2020-07-19 Alan Modra <amodra@gmail.com>
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* elf64-ppc.c (struct ppc_link_hash_table): Add has_power10_relocs.
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(select_alt_stub): New function.
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(ppc_get_stub_entry): Use it here.
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(ppc64_elf_check_relocs): Set had_power10_relocs rather than
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power10_stubs.
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(ppc64_elf_size_stubs): Clear power10_stubs here instead. Don't
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merge notoc stubs with other varieties when power10_stubs is "auto".
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Instead dup the stub hash table entry.
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(plt_stub_size, ppc_build_one_stub, ppc_size_one_stub): Adjust
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tests of power10_stubs.
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2020-07-15 Hans-Peter Nilsson <hp@bitrange.com>
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* elf64-mmix.c (mmix_elf_relax_section): Improve accounting for
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101
bfd/elf64-ppc.c
101
bfd/elf64-ppc.c
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@ -3245,6 +3245,9 @@ struct ppc_link_hash_table
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/* Whether calls are made via the PLT from NOTOC functions. */
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unsigned int notoc_plt:1;
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/* Whether any code linked seems to be Power10. */
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unsigned int has_power10_relocs:1;
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/* Incremented every time we size stubs. */
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unsigned int stub_iteration;
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@ -3679,6 +3682,37 @@ ppc_stub_name (const asection *input_section,
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return stub_name;
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}
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/* If mixing power10 with non-power10 code and --power10-stubs is not
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specified (or is auto) then calls using @notoc relocations that
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need a stub will utilize power10 instructions in the stub, and
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calls without @notoc relocations will not use power10 instructions.
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The two classes of stubs are stored in separate stub_hash_table
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entries having the same key string. The two entries will always be
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adjacent on entry->root.next chain, even if hash table resizing
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occurs. This function selects the correct entry to use. */
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static struct ppc_stub_hash_entry *
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select_alt_stub (struct ppc_stub_hash_entry *entry, bfd_boolean notoc)
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{
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bfd_boolean have_notoc;
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have_notoc = (entry->stub_type == ppc_stub_plt_call_notoc
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|| entry->stub_type == ppc_stub_plt_branch_notoc
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|| entry->stub_type == ppc_stub_long_branch_notoc);
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if (have_notoc != notoc)
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{
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const char *stub_name = entry->root.string;
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entry = (struct ppc_stub_hash_entry *) entry->root.next;
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if (entry != NULL
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&& entry->root.string != stub_name)
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entry = NULL;
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}
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return entry;
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}
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/* Look up an entry in the stub hash. Stub entries are cached because
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creating the stub name takes a bit of time. */
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@ -3723,6 +3757,13 @@ ppc_get_stub_entry (const asection *input_section,
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free (stub_name);
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}
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if (stub_entry != NULL && htab->params->power10_stubs == -1)
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{
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bfd_boolean notoc = ELF64_R_TYPE (rel->r_info) == R_PPC64_REL24_NOTOC;
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stub_entry = select_alt_stub (stub_entry, notoc);
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}
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return stub_entry;
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}
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@ -4599,8 +4640,7 @@ ppc64_elf_check_relocs (bfd *abfd, struct bfd_link_info *info,
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case R_PPC64_PLT_PCREL34:
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case R_PPC64_PLT_PCREL34_NOTOC:
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case R_PPC64_PCREL28:
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if (htab->params->power10_stubs < 0)
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htab->params->power10_stubs = 1;
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htab->has_power10_relocs = 1;
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break;
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default:
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break;
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@ -10761,7 +10801,7 @@ plt_stub_size (struct ppc_link_hash_table *htab,
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if (stub_entry->stub_type >= ppc_stub_plt_call_notoc)
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{
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if (htab->params->power10_stubs > 0)
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if (htab->params->power10_stubs != 0)
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{
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bfd_vma start = (stub_entry->stub_offset
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+ stub_entry->group->stub_sec->output_offset
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@ -11602,7 +11642,7 @@ ppc_build_one_stub (struct bfd_hash_entry *gen_entry, void *in_arg)
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relp = p;
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num_rel = 0;
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if (htab->params->power10_stubs > 0)
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if (htab->params->power10_stubs != 0)
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{
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bfd_boolean load = stub_entry->stub_type >= ppc_stub_plt_call_notoc;
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p = build_power10_offset (htab->params->stub_bfd, p, off, odd, load);
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@ -11641,7 +11681,7 @@ ppc_build_one_stub (struct bfd_hash_entry *gen_entry, void *in_arg)
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if (info->emitrelocations)
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{
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bfd_vma roff = relp - stub_entry->group->stub_sec->contents;
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if (htab->params->power10_stubs > 0)
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if (htab->params->power10_stubs != 0)
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num_rel += num_relocs_for_power10_offset (off, odd);
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else
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{
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@ -11651,7 +11691,7 @@ ppc_build_one_stub (struct bfd_hash_entry *gen_entry, void *in_arg)
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r = get_relocs (stub_entry->group->stub_sec, num_rel);
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if (r == NULL)
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return FALSE;
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if (htab->params->power10_stubs > 0)
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if (htab->params->power10_stubs != 0)
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r = emit_relocs_for_power10_offset (info, r, roff, targ, off, odd);
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else
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r = emit_relocs_for_offset (info, r, roff, targ, off);
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@ -11669,7 +11709,7 @@ ppc_build_one_stub (struct bfd_hash_entry *gen_entry, void *in_arg)
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}
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}
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if (htab->params->power10_stubs <= 0
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if (htab->params->power10_stubs == 0
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&& htab->glink_eh_frame != NULL
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&& htab->glink_eh_frame->size != 0)
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{
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@ -12017,7 +12057,7 @@ ppc_size_one_stub (struct bfd_hash_entry *gen_entry, void *in_arg)
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if (info->emitrelocations)
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{
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unsigned int num_rel;
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if (htab->params->power10_stubs > 0)
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if (htab->params->power10_stubs != 0)
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num_rel = num_relocs_for_power10_offset (off, odd);
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else
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num_rel = num_relocs_for_offset (off - 8);
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@ -12025,7 +12065,7 @@ ppc_size_one_stub (struct bfd_hash_entry *gen_entry, void *in_arg)
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stub_entry->group->stub_sec->flags |= SEC_RELOC;
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}
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if (htab->params->power10_stubs > 0)
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if (htab->params->power10_stubs != 0)
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extra = size_power10_offset (off, odd);
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else
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extra = size_offset (off - 8);
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@ -12036,7 +12076,7 @@ ppc_size_one_stub (struct bfd_hash_entry *gen_entry, void *in_arg)
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calculated. */
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off -= extra;
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if (htab->params->power10_stubs <= 0)
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if (htab->params->power10_stubs == 0)
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{
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/* After the bcl, lr has been modified so we need to emit
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.eh_frame info saying the return address is in r12. */
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@ -12099,7 +12139,7 @@ ppc_size_one_stub (struct bfd_hash_entry *gen_entry, void *in_arg)
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if (info->emitrelocations)
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{
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unsigned int num_rel;
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if (htab->params->power10_stubs > 0)
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if (htab->params->power10_stubs != 0)
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num_rel = num_relocs_for_power10_offset (off, odd);
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else
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num_rel = num_relocs_for_offset (off - 8);
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@ -12109,7 +12149,7 @@ ppc_size_one_stub (struct bfd_hash_entry *gen_entry, void *in_arg)
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size = plt_stub_size (htab, stub_entry, off);
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if (htab->params->power10_stubs <= 0)
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if (htab->params->power10_stubs == 0)
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{
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/* After the bcl, lr has been modified so we need to emit
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.eh_frame info saying the return address is in r12. */
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@ -13034,6 +13074,9 @@ ppc64_elf_size_stubs (struct bfd_link_info *info)
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if (htab == NULL)
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return FALSE;
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if (htab->params->power10_stubs == -1 && !htab->has_power10_relocs)
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htab->params->power10_stubs = 0;
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if (htab->params->plt_thread_safe == -1 && !bfd_link_executable (info))
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htab->params->plt_thread_safe = 1;
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if (!htab->opd_abi)
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@ -13409,6 +13452,7 @@ ppc64_elf_size_stubs (struct bfd_link_info *info)
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if (stub_entry != NULL)
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{
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enum ppc_stub_type old_type;
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/* A stub has already been created, but it may
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not be the required type. We shouldn't be
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transitioning from plt_call to long_branch
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@ -13416,6 +13460,39 @@ ppc64_elf_size_stubs (struct bfd_link_info *info)
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upgrading from plt_call to plt_call_r2save or
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from long_branch to long_branch_r2off. */
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free (stub_name);
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if (htab->params->power10_stubs == -1)
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{
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/* For --power10-stubs=auto, don't merge _notoc
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and other varieties of stubs. (The _both
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variety won't be created.) */
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bfd_boolean notoc = r_type == R_PPC64_REL24_NOTOC;
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struct ppc_stub_hash_entry *alt_stub
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= select_alt_stub (stub_entry, notoc);
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if (alt_stub == NULL)
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{
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alt_stub = (struct ppc_stub_hash_entry *)
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stub_hash_newfunc (NULL,
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&htab->stub_hash_table,
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stub_entry->root.string);
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if (alt_stub == NULL)
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{
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/* xgettext:c-format */
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_bfd_error_handler
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(_("%pB: cannot create stub entry %s"),
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section->owner, stub_entry->root.string);
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goto error_ret_free_internal;
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}
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*alt_stub = *stub_entry;
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stub_entry->root.next = &alt_stub->root;
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if (notoc)
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/* Sort notoc stubs first, for no good
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reason. */
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alt_stub = stub_entry;
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alt_stub->stub_type = stub_type;
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}
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stub_entry = alt_stub;
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}
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old_type = stub_entry->stub_type;
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switch (old_type)
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{
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14
ld/ChangeLog
14
ld/ChangeLog
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@ -1,3 +1,17 @@
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2020-07-19 Alan Modra <amodra@gmail.com>
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* emultempl/ppc64elf.em (power10-stubs): Accept optional "auto" arg.
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* ld.texi (power10-stubs): Update.
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* testsuite/ld-powerpc/callstub-1.d: Force --power10-stubs.
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* testsuite/ld-powerpc/callstub-2.d: Relax branch offset comparison.
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* testsuite/ld-powerpc/callstub-4.d: New test.
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* testsuite/ld-powerpc/notoc.d: Force --no-power10-stubs.
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* testsuite/ld-powerpc/notoc3.d,
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* testsuite/ld-powerpc/notoc3.s,
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* testsuite/ld-powerpc/notoc3.wf: New test.
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* testsuite/ld-powerpc/powerpc.exp: Run new tests. Pass
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--no-power10-stubs for notoc link.
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2020-07-15 Hans-Peter Nilsson <hp@bitrange.com>
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* testsuite/ld-mmix/undef-1.d, testsuite/ld-mmix/undef-1m.d,
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@ -716,7 +716,7 @@ PARSE_AND_LIST_LONGOPTS=${PARSE_AND_LIST_LONGOPTS}'
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{ "no-plt-align", no_argument, NULL, OPTION_NO_PLT_ALIGN },
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{ "plt-localentry", optional_argument, NULL, OPTION_PLT_LOCALENTRY },
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{ "no-plt-localentry", no_argument, NULL, OPTION_NO_PLT_LOCALENTRY },
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{ "power10-stubs", no_argument, NULL, OPTION_POWER10_STUBS },
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{ "power10-stubs", optional_argument, NULL, OPTION_POWER10_STUBS },
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{ "no-power10-stubs", no_argument, NULL, OPTION_NO_POWER10_STUBS },
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{ "emit-stub-syms", no_argument, NULL, OPTION_STUBSYMS },
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{ "no-emit-stub-syms", no_argument, NULL, OPTION_NO_STUBSYMS },
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@ -773,7 +773,7 @@ PARSE_AND_LIST_OPTIONS=${PARSE_AND_LIST_OPTIONS}'
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--no-plt-localentry Don'\''t optimize ELFv2 calls\n"
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));
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fprintf (file, _("\
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--power10-stubs Use Power10 PLT call stubs (default auto)\n"
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--power10-stubs [=auto] Use Power10 PLT call stubs (default auto)\n"
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));
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fprintf (file, _("\
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--no-power10-stubs Don'\''t use Power10 PLT call stubs\n"
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@ -889,7 +889,20 @@ PARSE_AND_LIST_ARGS_CASES=${PARSE_AND_LIST_ARGS_CASES}'
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break;
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case OPTION_POWER10_STUBS:
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params.power10_stubs = 1;
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if (optarg != NULL)
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{
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if (strcasecmp (optarg, "auto") == 0)
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params.power10_stubs = -1;
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else if (strcasecmp (optarg, "yes") == 0)
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params.power10_stubs = 1;
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else if (strcasecmp (optarg, "no") == 0)
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params.power10_stubs = 0;
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else
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einfo (_("%F%P: invalid --power10-stubs argument `%s'\''\n"),
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optarg);
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}
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else
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params.power10_stubs = 1;
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break;
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case OPTION_NO_POWER10_STUBS:
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12
ld/ld.texi
12
ld/ld.texi
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@ -7922,15 +7922,13 @@ care. @option{--no-plt-localentry} is the default.
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@itemx --no-power10-stubs
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When PowerPC64 @command{ld} links input object files containing
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relocations used on power10 prefixed instructions it normally creates
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linkage stubs (PLT call and long branch) using power10 instructions.
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In particular for @code{@@notoc} PLT calls where @code{r2} is not
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known the power10 stubs are smaller and faster, so are preferred for
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linkage stubs (PLT call and long branch) using power10 instructions
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for @code{@@notoc} PLT calls where @code{r2} is not known. The
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power10 notoc stubs are smaller and faster, so are preferred for
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power10. @option{--power10-stubs} and @option{--no-power10-stubs}
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allow you to override the linker's selection of stub instructions.
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For example, when linking a shared library that contains cpu-optimized
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versions of functions for both power9 and power10, you might use
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@option{--no-power10-stubs} so that power9 code making calls doesn't
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attempt to execute power10 instructions.
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@option{--power10-stubs=auto} allows the user to select the default
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auto mode.
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@end table
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@ifclear GENERIC
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@ -1,5 +1,5 @@
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#as: -a64 -mpower10
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#ld: -melf64ppc -shared --plt-align=0 --hash-style=gnu
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#ld: -melf64ppc -shared --plt-align=0 --power10-stubs --hash-style=gnu
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#objdump: -dr -Mpower10
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.*
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@ -20,10 +20,10 @@ Disassembly of section \.text:
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.*: (7d 89 03 a6|a6 03 89 7d) mtctr r12
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.*: (4e 80 04 20|20 04 80 4e) bctr
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#...
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.*: (4b ff ff c1|c1 ff ff 4b) bl .*\.plt_call\.f1>
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.*<_start>:
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.*: (4b ff .. ..|.. .. ff 4b) bl .*\.plt_call\.f1>
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.*: (e8 41 00 18|18 00 41 e8) ld r2,24\(r1\)
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.*: (4b ff ff bd|bd ff ff 4b) bl .*\.plt_call\.f1\+0x4>
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.*: (4b ff ff cd|cd ff ff 4b) bl .*\.plt_call\.f2>
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.*: (04 10 00 01|01 00 10 04) pld r3,.*
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||||
.*: (e4 60 .. ..|.. .. 60 e4)
|
||||
.*: (4b ff .. ..|.. .. ff 4b) bl .*\.plt_call\.f1\+0x4>
|
||||
.*: (4b ff .. ..|.. .. ff 4b) bl .*\.plt_call\.f2>
|
||||
#pass
|
||||
|
|
|
|||
|
|
@ -27,9 +27,9 @@ Disassembly of section \.text:
|
|||
.*: (7d 89 03 a6|a6 03 89 7d) mtctr r12
|
||||
.*: (4e 80 04 20|20 04 80 4e) bctr
|
||||
|
||||
#...
|
||||
.*: (4b ff ff bd|bd ff ff 4b) bl .*\.plt_call\.f1>
|
||||
.*<_start>:
|
||||
.*: (4b ff .. ..|.. .. ff 4b) bl .*\.plt_call\.f1>
|
||||
.*: (e8 41 00 18|18 00 41 e8) ld r2,24\(r1\)
|
||||
.*: (4b ff ff b9|b9 ff ff 4b) bl .*\.plt_call\.f1\+0x4>
|
||||
.*: (4b ff ff d5|d5 ff ff 4b) bl .*\.plt_call\.f2>
|
||||
.*: (4b ff .. ..|.. .. ff 4b) bl .*\.plt_call\.f1\+0x4>
|
||||
.*: (4b ff .. ..|.. .. ff 4b) bl .*\.plt_call\.f2>
|
||||
#pass
|
||||
|
|
|
|||
|
|
@ -0,0 +1,32 @@
|
|||
#source: callstub-1.s
|
||||
#as: -a64 -mpower10
|
||||
#ld: -melf64ppc -shared --plt-align=0 --hash-style=gnu
|
||||
#objdump: -dr -Mpower10
|
||||
|
||||
.*
|
||||
|
||||
Disassembly of section \.text:
|
||||
|
||||
.*\.plt_call\.f1>:
|
||||
.*: (04 10 00 01|01 00 10 04) pld r12,.*
|
||||
.*: (e5 80 .. ..|.. .. 80 e5)
|
||||
.*: (7d 89 03 a6|a6 03 89 7d) mtctr r12
|
||||
.*: (4e 80 04 20|20 04 80 4e) bctr
|
||||
.*: (f8 41 00 18|18 00 41 f8) std r2,24\(r1\)
|
||||
.*: (e9 82 80 28|28 80 82 e9) ld r12,-32728\(r2\)
|
||||
.*: (7d 89 03 a6|a6 03 89 7d) mtctr r12
|
||||
.*: (4e 80 04 20|20 04 80 4e) bctr
|
||||
|
||||
.*\.plt_call\.f2>:
|
||||
.*: (04 10 00 01|01 00 10 04) pld r12,.*
|
||||
.*: (e5 80 .. ..|.. .. 80 e5)
|
||||
.*: (7d 89 03 a6|a6 03 89 7d) mtctr r12
|
||||
.*: (4e 80 04 20|20 04 80 4e) bctr
|
||||
#...
|
||||
|
||||
.*<_start>:
|
||||
.*: (4b ff .. ..|.. .. ff 4b) bl .*\.plt_call\.f1\+0x10>
|
||||
.*: (e8 41 00 18|18 00 41 e8) ld r2,24\(r1\)
|
||||
.*: (4b ff .. ..|.. .. ff 4b) bl .*\.plt_call\.f1>
|
||||
.*: (4b ff .. ..|.. .. ff 4b) bl .*\.plt_call\.f2>
|
||||
#pass
|
||||
|
|
@ -1,6 +1,6 @@
|
|||
#source: notoc.s
|
||||
#as: -a64
|
||||
#ld: --no-plt-localentry -T ext.lnk
|
||||
#ld: --no-plt-localentry --no-power10-stubs -T ext.lnk
|
||||
#objdump: -d
|
||||
#target: powerpc64*-*-*
|
||||
|
||||
|
|
|
|||
|
|
@ -0,0 +1,97 @@
|
|||
#as: -a64 -mpower10
|
||||
#ld: --no-plt-localentry -T ext.lnk
|
||||
#objdump: -d
|
||||
#target: powerpc64*-*-*
|
||||
|
||||
.*
|
||||
|
||||
Disassembly of section \.text:
|
||||
|
||||
.* <.*\.long_branch\.f1>:
|
||||
.*: (18 00 41 f8|f8 41 00 18) std r2,24\(r1\)
|
||||
.*: (.. .. 00 48|48 00 .. ..) b .* <f1>
|
||||
|
||||
.* <.*\.long_branch\.g1>:
|
||||
.*: (18 00 41 f8|f8 41 00 18) std r2,24\(r1\)
|
||||
.*: (.. .. 00 48|48 00 .. ..) b .* <g1>
|
||||
|
||||
.* <.*\.plt_branch\.ext>:
|
||||
.*: (00 20 60 3d|3d 60 20 00) lis r11,8192
|
||||
.*: (00 00 6b 61|61 6b 00 00) ori r11,r11,0
|
||||
.*: (ff ef 13 06|06 13 ef ff) pla r12,-268435736
|
||||
.*: (e8 fe 80 39|39 80 fe e8)
|
||||
.*: (46 17 6b 79|79 6b 17 46) rldicr r11,r11,34,29
|
||||
.*: (14 62 8b 7d|7d 8b 62 14) add r12,r11,r12
|
||||
.*: (a6 03 89 7d|7d 89 03 a6) mtctr r12
|
||||
.*: (20 04 80 4e|4e 80 04 20) bctr
|
||||
.*: (00 80 82 e9|e9 82 80 00) ld r12,-32768\(r2\)
|
||||
.*: (a6 03 89 7d|7d 89 03 a6) mtctr r12
|
||||
.*: (20 04 80 4e|4e 80 04 20) bctr
|
||||
|
||||
.* <.*\.long_branch\.f2>:
|
||||
.*: (00 00 00 60|60 00 00 00) nop
|
||||
.*: (00 00 10 06|06 10 00 00) pla r12,108
|
||||
.*: (6c 00 80 39|39 80 00 6c)
|
||||
.*: (.. .. 00 48|48 00 .. ..) b .* <f2>
|
||||
|
||||
.* <.*\.long_branch\.g2>:
|
||||
.*: (00 00 00 60|60 00 00 00) nop
|
||||
.*: (00 00 10 06|06 10 00 00) pla r12,144
|
||||
.*: (90 00 80 39|39 80 00 90)
|
||||
.*: (.. .. 00 48|48 00 .. ..) b .* <g2>
|
||||
#...
|
||||
|
||||
.* <f1>:
|
||||
.*: (01 00 00 48|48 00 00 01) bl .* <f1>
|
||||
.*: (.. .. ff 4b|4b ff .. ..) bl .* <.*\.long_branch\.f2>
|
||||
.*: (.. .. 00 48|48 00 .. ..) bl .* <g1>
|
||||
.*: (.. .. ff 4b|4b ff .. ..) bl .* <.*\.long_branch\.g2>
|
||||
.*: (.. .. ff 4b|4b ff .. ..) bl .* <.*\.plt_branch\.ext>
|
||||
.*: (20 00 80 4e|4e 80 00 20) blr
|
||||
|
||||
.* <g1>:
|
||||
.*: (.. .. ff 4b|4b ff .. ..) bl .* <.*\.long_branch\.f2>
|
||||
.*: (.. .. ff 4b|4b ff .. ..) bl .* <f1>
|
||||
.*: (.. .. ff 4b|4b ff .. ..) bl .* <.*\.long_branch\.g2>
|
||||
.*: (.. .. ff 4b|4b ff .. ..) bl .* <g1>
|
||||
.*: (20 00 80 4e|4e 80 00 20) blr
|
||||
|
||||
.* <f2>:
|
||||
.*: (02 10 40 3c|3c 40 10 02) lis r2,4098
|
||||
.*: (00 90 42 38|38 42 90 00) addi r2,r2,-28672
|
||||
.*: (.. .. ff 4b|4b ff .. ..) bl .* <.*\.long_branch\.f1>
|
||||
.*: (18 00 41 e8|e8 41 00 18) ld r2,24\(r1\)
|
||||
.*: (.. .. ff 4b|4b ff .. ..) bl .* <f2\+0x8>
|
||||
.*: (00 00 00 60|60 00 00 00) nop
|
||||
.*: (.. .. ff 4b|4b ff .. ..) bl .* <.*\.long_branch\.g1>
|
||||
.*: (18 00 41 e8|e8 41 00 18) ld r2,24\(r1\)
|
||||
.*: (.. .. 00 48|48 00 .. ..) bl .* <g2\+0x8>
|
||||
.*: (00 00 00 60|60 00 00 00) nop
|
||||
.*: (.. .. ff 4b|4b ff .. ..) bl .* <.*\.plt_branch\.ext\+0x20>
|
||||
.*: (00 00 00 60|60 00 00 00) nop
|
||||
.*: (20 00 80 4e|4e 80 00 20) blr
|
||||
|
||||
.* <g2>:
|
||||
.*: (02 10 40 3c|3c 40 10 02) lis r2,4098
|
||||
.*: (00 90 42 38|38 42 90 00) addi r2,r2,-28672
|
||||
.*: (.. .. ff 4b|4b ff .. ..) bl .* <f2\+0x8>
|
||||
.*: (00 00 00 60|60 00 00 00) nop
|
||||
.*: (.. .. ff 4b|4b ff .. ..) bl .* <.*\.long_branch\.f1>
|
||||
.*: (18 00 41 e8|e8 41 00 18) ld r2,24\(r1\)
|
||||
.*: (.. .. ff 4b|4b ff .. ..) bl .* <g2\+0x8>
|
||||
.*: (00 00 00 60|60 00 00 00) nop
|
||||
.*: (.. .. ff 4b|4b ff .. ..) bl .* <.*\.long_branch\.g1>
|
||||
.*: (18 00 41 e8|e8 41 00 18) ld r2,24\(r1\)
|
||||
.*: (20 00 80 4e|4e 80 00 20) blr
|
||||
|
||||
.* <_start>:
|
||||
.*: (00 00 00 48|48 00 00 00) b .* <_start>
|
||||
#...
|
||||
|
||||
Disassembly of section \.text\.ext:
|
||||
|
||||
8000000000000000 <ext>:
|
||||
8000000000000000: (02 10 40 3c|3c 40 10 02) lis r2,4098
|
||||
8000000000000004: (00 90 42 38|38 42 90 00) addi r2,r2,-28672
|
||||
8000000000000008: (00 00 00 60|60 00 00 00) nop
|
||||
800000000000000c: (20 00 80 4e|4e 80 00 20) blr
|
||||
|
|
@ -0,0 +1,59 @@
|
|||
.text
|
||||
.globl f1, f2, g1, g2, _start
|
||||
.weak ext
|
||||
.abiversion 2
|
||||
|
||||
f1:
|
||||
.localentry f1,1
|
||||
bl f1@notoc
|
||||
bl f2@notoc
|
||||
bl g1@notoc
|
||||
bl g2@notoc
|
||||
bl ext@notoc
|
||||
blr
|
||||
|
||||
g1:
|
||||
.localentry g1,1
|
||||
bl f2@notoc
|
||||
bl f1@notoc
|
||||
bl g2@notoc
|
||||
bl g1@notoc
|
||||
blr
|
||||
|
||||
f2:
|
||||
0:
|
||||
addis 2,12,.TOC.-0b@ha
|
||||
addi 2,2,.TOC.-0b@l
|
||||
.localentry f2,.-0b
|
||||
bl f1
|
||||
nop
|
||||
bl f2
|
||||
nop
|
||||
bl g1
|
||||
nop
|
||||
bl g2
|
||||
nop
|
||||
bl ext
|
||||
nop
|
||||
blr
|
||||
|
||||
g2:
|
||||
0:
|
||||
addis 2,12,.TOC.-0b@ha
|
||||
addi 2,2,.TOC.-0b@l
|
||||
.localentry g2,.-0b
|
||||
bl f2
|
||||
nop
|
||||
bl f1
|
||||
nop
|
||||
bl g2
|
||||
nop
|
||||
bl g1
|
||||
nop
|
||||
blr
|
||||
|
||||
_start:
|
||||
.cfi_startproc
|
||||
b _start
|
||||
pld 3,_start
|
||||
.cfi_endproc
|
||||
|
|
@ -0,0 +1,17 @@
|
|||
Contents of the \.eh_frame section:
|
||||
|
||||
|
||||
00000000 0000000000000010 00000000 CIE
|
||||
Version: 1
|
||||
Augmentation: "zR"
|
||||
Code alignment factor: 4
|
||||
Data alignment factor: -8
|
||||
Return address column: 65
|
||||
Augmentation data: 1b
|
||||
DW_CFA_def_cfa: r1 ofs 0
|
||||
|
||||
00000014 0000000000000010 00000018 FDE cie=00000000 pc=000000001000020c\.\.0000000010000218
|
||||
DW_CFA_nop
|
||||
DW_CFA_nop
|
||||
DW_CFA_nop
|
||||
|
||||
|
|
@ -317,10 +317,14 @@ set ppc64elftests {
|
|||
{"ambig shared v1" "-shared -melf64ppc" "" "-a64" {funv1.s} {} "funv1.so"}
|
||||
{"ambig shared v2" "-shared -melf64ppc" "" "-a64" {funv2.s} {} "funv2.so"}
|
||||
{"notoc ext" "" "" "-a64" {ext.s} {} ""}
|
||||
{"notoc" "-melf64ppc --no-plt-localentry -T ext.lnk" "" "-a64" {notoc.s}
|
||||
{"notoc" "-melf64ppc --no-plt-localentry --no-power10-stubs -T ext.lnk"
|
||||
"" "-a64" {notoc.s}
|
||||
{{objdump -d notoc.d} {readelf {-wf -W} notoc.wf}} "notoc"}
|
||||
{"notoc2" "-melf64ppc -shared" "" "-a64 -mpower10" {notoc2.s}
|
||||
{{objdump {-d -Mpower10} notoc2.d}} "notoc2"}
|
||||
{"notoc3" "-melf64ppc --no-plt-localentry -T ext.lnk" ""
|
||||
"-a64 -mpower10" {notoc3.s}
|
||||
{{objdump -d notoc3.d} {readelf {-wf -W} notoc3.wf}} "notoc3"}
|
||||
{"pcrelopt" "-melf64ppc --hash-style=gnu" "tmpdir/symtocbase.so"
|
||||
"-a64 -mpower10" {pcrelopt.s}
|
||||
{{objdump {-d -Mpower10} pcrelopt.d}
|
||||
|
|
@ -403,6 +407,7 @@ if [ supports_ppc64 ] then {
|
|||
run_dump_test "callstub-1"
|
||||
run_dump_test "callstub-2"
|
||||
run_dump_test "callstub-3"
|
||||
run_dump_test "callstub-4"
|
||||
run_dump_test "tlsgd"
|
||||
run_dump_test "tlsld"
|
||||
run_dump_test "tlsie"
|
||||
|
|
|
|||
Loading…
Reference in New Issue