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MIPS/BFD: Remove duplicate NewABI JALR relocation handling
Remove separate original NewABI JALR relocation handling, introduced with commitd06471104a("relax jalr $t9 [R_MIPS_JALR symbol] to bal symbol"), <https://sourceware.org/ml/binutils/2003-03/msg00394.html>, and only used by LD with the `--relax' option specified, and rely solely on `mips_elf_perform_relocation' code, which has been introduced with commit1367d393bb("On the RM9000 convert jal to bal if in range"), <https://www.sourceware.org/ml/binutils/2004-12/msg00088.html> and since made more complete, across all the three ABIs. Also remove the `--relax' option, now irrelevant, from the tests added with the former commit. bfd/ * elfxx-mips.h (_bfd_mips_relax_section): Remove prototype. * elfxx-mips.c (_bfd_mips_relax_section): Remove function. * elf64-mips.c (bfd_elf64_bfd_relax_section): Remove macro. * elfn32-mips.c (bfd_elf32_bfd_relax_section): Likewise. ld/ * testsuite/ld-mips-elf/relax-jalr-n32.d: Remove `--relax' option. * testsuite/ld-mips-elf/relax-jalr-n32-shared.d: Likewise. * testsuite/ld-mips-elf/relax-jalr-n64.d: Likewise. * testsuite/ld-mips-elf/relax-jalr-n64-shared.d: Likewise.
This commit is contained in:
Maciej W. Rozycki
parent
c1556ecd78
commit
5d58c73379
@ -1,3 +1,10 @@
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2017-02-23 Maciej W. Rozycki <macro@imgtec.com>
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* elfxx-mips.h (_bfd_mips_relax_section): Remove prototype.
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* elfxx-mips.c (_bfd_mips_relax_section): Remove function.
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* elf64-mips.c (bfd_elf64_bfd_relax_section): Remove macro.
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* elfn32-mips.c (bfd_elf32_bfd_relax_section): Likewise.
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2017-02-23 Maciej W. Rozycki <macro@imgtec.com>
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* elfxx-mips.c (mips_elf_calculate_relocation) <R_MIPS_JALR>
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@ -4507,7 +4507,6 @@ const struct elf_size_info mips_elf64_size_info =
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#define bfd_elf64_canonicalize_reloc mips_elf64_canonicalize_reloc
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#define bfd_elf64_get_dynamic_reloc_upper_bound mips_elf64_get_dynamic_reloc_upper_bound
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#define bfd_elf64_canonicalize_dynamic_reloc mips_elf64_canonicalize_dynamic_reloc
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#define bfd_elf64_bfd_relax_section _bfd_mips_relax_section
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#define bfd_elf64_mkobject _bfd_mips_elf_mkobject
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/* The SGI style (n)64 NewABI. */
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@ -3721,7 +3721,6 @@ static const struct ecoff_debug_swap mips_elf32_ecoff_debug_swap = {
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#define bfd_elf32_bfd_set_private_flags _bfd_mips_elf_set_private_flags
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#define bfd_elf32_bfd_print_private_bfd_data \
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_bfd_mips_elf_print_private_bfd_data
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#define bfd_elf32_bfd_relax_section _bfd_mips_relax_section
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#define bfd_elf32_mkobject _bfd_mips_elf_mkobject
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/* Support for SGI-ish mips targets using n32 ABI. */
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161
bfd/elfxx-mips.c
161
bfd/elfxx-mips.c
@ -8889,167 +8889,6 @@ _bfd_mips_elf_check_relocs (bfd *abfd, struct bfd_link_info *info,
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return TRUE;
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}
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bfd_boolean
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_bfd_mips_relax_section (bfd *abfd, asection *sec,
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struct bfd_link_info *link_info,
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bfd_boolean *again)
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{
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Elf_Internal_Rela *internal_relocs;
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Elf_Internal_Rela *irel, *irelend;
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Elf_Internal_Shdr *symtab_hdr;
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bfd_byte *contents = NULL;
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size_t extsymoff;
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bfd_boolean changed_contents = FALSE;
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bfd_vma sec_start = sec->output_section->vma + sec->output_offset;
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Elf_Internal_Sym *isymbuf = NULL;
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/* We are not currently changing any sizes, so only one pass. */
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*again = FALSE;
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if (bfd_link_relocatable (link_info))
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return TRUE;
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internal_relocs = _bfd_elf_link_read_relocs (abfd, sec, NULL, NULL,
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link_info->keep_memory);
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if (internal_relocs == NULL)
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return TRUE;
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irelend = internal_relocs + sec->reloc_count
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* get_elf_backend_data (abfd)->s->int_rels_per_ext_rel;
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symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
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extsymoff = (elf_bad_symtab (abfd)) ? 0 : symtab_hdr->sh_info;
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for (irel = internal_relocs; irel < irelend; irel++)
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{
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bfd_vma symval;
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bfd_signed_vma sym_offset;
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unsigned int r_type;
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unsigned long r_symndx;
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asection *sym_sec;
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unsigned long instruction;
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/* Turn jalr into bgezal, and jr into beq, if they're marked
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with a JALR relocation, that indicate where they jump to.
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This saves some pipeline bubbles. */
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r_type = ELF_R_TYPE (abfd, irel->r_info);
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if (r_type != R_MIPS_JALR)
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continue;
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r_symndx = ELF_R_SYM (abfd, irel->r_info);
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/* Compute the address of the jump target. */
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if (r_symndx >= extsymoff)
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{
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struct mips_elf_link_hash_entry *h
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= ((struct mips_elf_link_hash_entry *)
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elf_sym_hashes (abfd) [r_symndx - extsymoff]);
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while (h->root.root.type == bfd_link_hash_indirect
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|| h->root.root.type == bfd_link_hash_warning)
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h = (struct mips_elf_link_hash_entry *) h->root.root.u.i.link;
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/* If a symbol is undefined, or if it may be overridden,
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skip it. */
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if (! ((h->root.root.type == bfd_link_hash_defined
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|| h->root.root.type == bfd_link_hash_defweak)
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&& h->root.root.u.def.section)
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|| (bfd_link_pic (link_info) && ! link_info->symbolic
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&& !h->root.forced_local))
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continue;
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sym_sec = h->root.root.u.def.section;
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if (sym_sec->output_section)
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symval = (h->root.root.u.def.value
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+ sym_sec->output_section->vma
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+ sym_sec->output_offset);
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else
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symval = h->root.root.u.def.value;
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}
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else
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{
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Elf_Internal_Sym *isym;
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/* Read this BFD's symbols if we haven't done so already. */
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if (isymbuf == NULL && symtab_hdr->sh_info != 0)
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{
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isymbuf = (Elf_Internal_Sym *) symtab_hdr->contents;
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if (isymbuf == NULL)
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isymbuf = bfd_elf_get_elf_syms (abfd, symtab_hdr,
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symtab_hdr->sh_info, 0,
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NULL, NULL, NULL);
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if (isymbuf == NULL)
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goto relax_return;
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}
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isym = isymbuf + r_symndx;
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if (isym->st_shndx == SHN_UNDEF)
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continue;
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else if (isym->st_shndx == SHN_ABS)
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sym_sec = bfd_abs_section_ptr;
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else if (isym->st_shndx == SHN_COMMON)
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sym_sec = bfd_com_section_ptr;
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else
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sym_sec
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= bfd_section_from_elf_index (abfd, isym->st_shndx);
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symval = isym->st_value
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+ sym_sec->output_section->vma
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+ sym_sec->output_offset;
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}
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/* Compute branch offset, from delay slot of the jump to the
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branch target. */
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sym_offset = (symval + irel->r_addend)
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- (sec_start + irel->r_offset + 4);
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/* Branch offset must be properly aligned. */
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if ((sym_offset & 3) != 0)
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continue;
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sym_offset >>= 2;
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/* Check that it's in range. */
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if (sym_offset < -0x8000 || sym_offset >= 0x8000)
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continue;
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/* Get the section contents if we haven't done so already. */
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if (!mips_elf_get_section_contents (abfd, sec, &contents))
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goto relax_return;
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instruction = bfd_get_32 (abfd, contents + irel->r_offset);
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/* If it was jalr <reg>, turn it into bgezal $zero, <target>. */
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if ((instruction & 0xfc1fffff) == 0x0000f809)
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instruction = 0x04110000;
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/* If it was jr <reg>, turn it into b <target>. */
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else if ((instruction & 0xfc1fffff) == 0x00000008)
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instruction = 0x10000000;
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else
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continue;
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instruction |= (sym_offset & 0xffff);
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bfd_put_32 (abfd, instruction, contents + irel->r_offset);
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changed_contents = TRUE;
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}
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if (contents != NULL
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&& elf_section_data (sec)->this_hdr.contents != contents)
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{
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if (!changed_contents && !link_info->keep_memory)
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free (contents);
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else
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{
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/* Cache the section contents for elf_link_input_bfd. */
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elf_section_data (sec)->this_hdr.contents = contents;
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}
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}
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return TRUE;
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relax_return:
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if (contents != NULL
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&& elf_section_data (sec)->this_hdr.contents != contents)
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free (contents);
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return FALSE;
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}
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/* Allocate space for global sym dynamic relocs. */
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static bfd_boolean
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@ -139,8 +139,6 @@ extern bfd_reloc_status_type _bfd_mips_elf_generic_reloc
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(bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
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extern unsigned long _bfd_elf_mips_mach
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(flagword);
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extern bfd_boolean _bfd_mips_relax_section
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(bfd *, asection *, struct bfd_link_info *, bfd_boolean *);
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extern bfd_vma _bfd_mips_elf_sign_extend
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(bfd_vma, int);
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extern void _bfd_mips_elf_merge_symbol_attribute
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@ -1,3 +1,11 @@
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2017-02-23 Maciej W. Rozycki <macro@imgtec.com>
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* testsuite/ld-mips-elf/relax-jalr-n32.d: Remove `--relax'
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option.
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* testsuite/ld-mips-elf/relax-jalr-n32-shared.d: Likewise.
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* testsuite/ld-mips-elf/relax-jalr-n64.d: Likewise.
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* testsuite/ld-mips-elf/relax-jalr-n64-shared.d: Likewise.
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2017-02-23 Maciej W. Rozycki <macro@imgtec.com>
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* testsuite/ld-mips-elf/jalr4.dd: New test.
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@ -2,7 +2,7 @@
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#source: relax-jalr.s
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#as: -march=from-abi -KPIC -n32 -EB
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#objdump: --prefix-addresses -d --show-raw-insn
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#ld: --relax -shared -melf32btsmipn32
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#ld: -shared -melf32btsmipn32
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.*: file format elf.*mips.*
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@ -2,7 +2,7 @@
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#source: relax-jalr.s
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#as: -march=from-abi -KPIC -n32 -EB
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#objdump: --prefix-addresses -d --show-raw-insn
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#ld: --relax -melf32btsmipn32
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#ld: -melf32btsmipn32
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.*: file format elf.*mips.*
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@ -2,7 +2,7 @@
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#source: relax-jalr.s
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#as: -march=from-abi -KPIC -64 -EB
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#objdump: --prefix-addresses -d --show-raw-insn
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#ld: --relax -shared -melf64btsmip
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#ld: -shared -melf64btsmip
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.*: file format elf.*mips.*
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@ -2,7 +2,7 @@
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#source: relax-jalr.s
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#as: -march=from-abi -KPIC -64 -EB
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#objdump: --prefix-addresses -d --show-raw-insn
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#ld: --relax -melf64btsmip
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#ld: -melf64btsmip
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.*: file format elf.*mips.*
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