Date: Fri, 12 Dec 2014 03:58:52 +0000 (UTC) From: Justin Hibbits <jhibbits@FreeBSD.org> To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-head@freebsd.org Subject: svn commit: r275718 - in head: contrib/binutils/bfd contrib/binutils/include/elf gnu/usr.bin/binutils/libbfd Message-ID: <201412120358.sBC3wq8J074256@svn.freebsd.org>
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Author: jhibbits Date: Fri Dec 12 03:58:51 2014 New Revision: 275718 URL: https://svnweb.freebsd.org/changeset/base/275718 Log: Add new PowerPC relocations to binutils Summary: LLVM/Clang generates relocations that our binutils doesn't understand, but newer binutils does. I got permission from the author of a series of patches to relicense them as GPLv2 for use in FreeBSD. The upstream git hashes are: ac2df442ac7901f00af15b272fc48b594b433713 2b95367962dc14f69d3c338c4d54195266e2e169 102890f04c44b64cf5cef4588267dd9f24086ac7 b7fcf6f6bb53b5027e111107f5416769cb9a5798 1d483afedd5a628dc84fb58d1d570f79fdfbfa7b 90aecf7a80c1cefeb45fc10a6cd02c8338e34b4c 3a71aa26df2a372a58e9c11ef9ba51fd0e83320a 727fc41e077139570ea8b8ddfd6c546b2a55627c With the import of clang 3.5, and a few backported patches, we should be able to move powerpc and powerpc64 to clang-as-cc soon. Test Plan: Passes make tinderbox, so no regressions. Binaries built with clang run on powerpc64. Reviewers: #committers, dim Reviewed By: dim Differential Revision: https://reviews.freebsd.org/D1297 Obtained from: Alan Modra, upstream binutils-gdb git MFC after: 3 weeks Relnotes: yes Modified: head/contrib/binutils/bfd/ChangeLog head/contrib/binutils/bfd/bfd-in2.h head/contrib/binutils/bfd/ecoff.c head/contrib/binutils/bfd/elf32-ppc.c head/contrib/binutils/bfd/elf64-ppc.c head/contrib/binutils/bfd/libbfd.h head/contrib/binutils/bfd/reloc.c head/contrib/binutils/bfd/section.c head/contrib/binutils/include/elf/ChangeLog head/contrib/binutils/include/elf/ppc.h head/contrib/binutils/include/elf/ppc64.h head/gnu/usr.bin/binutils/libbfd/bfd.h Modified: head/contrib/binutils/bfd/ChangeLog ============================================================================== --- head/contrib/binutils/bfd/ChangeLog Thu Dec 11 19:27:27 2014 (r275717) +++ head/contrib/binutils/bfd/ChangeLog Fri Dec 12 03:58:51 2014 (r275718) @@ -1,3 +1,49 @@ +2009-02-15 Alan Modra <amodra@bigpond.net.au> + + * elf64-ppc.c (struct _ppc64_elf_section_data): Delete t_symndx, + add toc.symndx and toc.add. + (ppc64_elf_check_relocs): Don't set htab->tls_get_addr here. + Set up toc.add. + (get_tls_mask): Add toc_addend param, set from toc.add. Adjust all + callers. + (ppc64_elf_tls_setup): Set htab->tls_get_addr and tls_get_addr_fd. + (branch_reloc_hash_match): New function, extracted from.. + (ppc64_elf_tls_optimize): ..here. + (ppc64_elf_relocate_section): Properly set addends when optimizing + tls sequences. Avoid unnecessary reading and writing of insns. + Only redo reloc when symbol changed. Bypass symbol checks when + using tlsld_got. + * elf32-ppc.c (ppc_elf_tls_setup): Correct comment. + (branch_reloc_hash_match): New function, extracted from.. + (ppc_elf_tls_optimize): ..here. + (ppc_elf_relocate_section): Avoid unnecessary reading of insns. + Don't clear addend on zapped __tls_get_addr reloc. + +2008-08-11 Alan Modra <amodra@bigpond.net.au> + + * elf64-ppc.c (toc_adjusting_stub_needed): Any call via the plt + needs r2 valid, not just those to external syms. + +2007-11-06 Alan Modra <amodra@bigpond.net.au> + + * elf32-ppc.c (ppc_elf_check_relocs): Don't refcount tlsld_got here.. + (ppc_elf_gc_sweep_hook): ..or here.. + (ppc_elf_tls_optimize): ..or here. Make two passes through the + relocs, ensuring that tls_get_addr calls follow gd and ld relocs. + (allocate_dynrelocs): Refcount tlsld_got here. + (ppc_elf_size_dynamic_sections): Call allocate_dynrelocs before + allocating tlsld_got. + (ppc_elf_relocate_section): Remove check that a tls_get_addr + call follows gd and ld relocs. + +2007-08-13 Alan Modra <amodra@bigpond.net.au> + + * elf64-ppc.c (ADDI_R12_R12, LD_R11_0R2, LD_R2_0R2): Define. + Update stub comments. + (build_plt_stub): Build two variants, one without "addis". + (ppc_build_one_stub): Build stubs without "addis" if possible. + (ppc_size_one_stub): Size new stubs. + 2007-07-02 Joseph Myers <joseph@codesourcery.com> * elfxx-mips.c (mips_elf_calculate_relocation): Handle Modified: head/contrib/binutils/bfd/bfd-in2.h ============================================================================== --- head/contrib/binutils/bfd/bfd-in2.h Thu Dec 11 19:27:27 2014 (r275717) +++ head/contrib/binutils/bfd/bfd-in2.h Fri Dec 12 03:58:51 2014 (r275718) @@ -1380,6 +1380,9 @@ typedef struct bfd_section /* Nonzero if this section has TLS related relocations. */ unsigned int has_tls_reloc:1; + /* Nonzero if this section has a call to __tls_get_addr. */ + unsigned int has_tls_get_addr_call:1; + /* Nonzero if this section has a gp reloc. */ unsigned int has_gp_reloc:1; @@ -1640,11 +1643,11 @@ extern asection bfd_ind_section; /* segment_mark, sec_info_type, use_rela_p, has_tls_reloc, */ \ 0, 0, 0, 0, \ \ - /* has_gp_reloc, need_finalize_relax, reloc_done, */ \ - 0, 0, 0, \ + /* has_tls_get_addr_call, has_gp_reloc, need_finalize_relax, */ \ + 0, 0, 0, \ \ - /* vma, lma, size, rawsize */ \ - 0, 0, 0, 0, \ + /* reloc_done, vma, lma, size, rawsize */ \ + 0, 0, 0, 0, 0, \ \ /* output_offset, output_section, alignment_power, */ \ 0, (struct bfd_section *) &SEC, 0, \ @@ -2896,6 +2899,8 @@ in the instruction. */ /* PowerPC and PowerPC64 thread-local storage relocations. */ BFD_RELOC_PPC_TLS, + BFD_RELOC_PPC_TLSGD, + BFD_RELOC_PPC_TLSLD, BFD_RELOC_PPC_DTPMOD, BFD_RELOC_PPC_TPREL16, BFD_RELOC_PPC_TPREL16_LO, Modified: head/contrib/binutils/bfd/ecoff.c ============================================================================== --- head/contrib/binutils/bfd/ecoff.c Thu Dec 11 19:27:27 2014 (r275717) +++ head/contrib/binutils/bfd/ecoff.c Fri Dec 12 03:58:51 2014 (r275718) @@ -58,10 +58,10 @@ static asection bfd_debug_section = 0, 0, 1, 0, /* segment_mark, sec_info_type, use_rela_p, has_tls_reloc, */ 0, 0, 0, 0, - /* has_gp_reloc, need_finalize_relax, reloc_done, */ - 0, 0, 0, - /* vma, lma, size, rawsize, */ - 0, 0, 0, 0, + /* has_tls_get_addr_call, has_gp_reloc, need_finalize_relax, */ + 0, 0, 0, + /* reloc_done, vma, lma, size, rawsize, */ + 0, 0, 0, 0, 0, /* output_offset, output_section, alignment_power, */ 0, NULL, 0, /* relocation, orelocation, reloc_count, filepos, rel_filepos, */ Modified: head/contrib/binutils/bfd/elf32-ppc.c ============================================================================== --- head/contrib/binutils/bfd/elf32-ppc.c Thu Dec 11 19:27:27 2014 (r275717) +++ head/contrib/binutils/bfd/elf32-ppc.c Fri Dec 12 03:58:51 2014 (r275718) @@ -746,7 +746,7 @@ static reloc_howto_type ppc_elf_howto_ra 0xffff, /* dst_mask */ FALSE), /* pcrel_offset */ - /* Marker reloc for TLS. */ + /* Marker relocs for TLS. */ HOWTO (R_PPC_TLS, 0, /* rightshift */ 2, /* size (0 = byte, 1 = short, 2 = long) */ @@ -761,6 +761,34 @@ static reloc_howto_type ppc_elf_howto_ra 0, /* dst_mask */ FALSE), /* pcrel_offset */ + HOWTO (R_PPC_TLSGD, + 0, /* rightshift */ + 2, /* size (0 = byte, 1 = short, 2 = long) */ + 32, /* bitsize */ + FALSE, /* pc_relative */ + 0, /* bitpos */ + complain_overflow_dont, /* complain_on_overflow */ + bfd_elf_generic_reloc, /* special_function */ + "R_PPC_TLSGD", /* name */ + FALSE, /* partial_inplace */ + 0, /* src_mask */ + 0, /* dst_mask */ + FALSE), /* pcrel_offset */ + + HOWTO (R_PPC_TLSLD, + 0, /* rightshift */ + 2, /* size (0 = byte, 1 = short, 2 = long) */ + 32, /* bitsize */ + FALSE, /* pc_relative */ + 0, /* bitpos */ + complain_overflow_dont, /* complain_on_overflow */ + bfd_elf_generic_reloc, /* special_function */ + "R_PPC_TLSLD", /* name */ + FALSE, /* partial_inplace */ + 0, /* src_mask */ + 0, /* dst_mask */ + FALSE), /* pcrel_offset */ + /* Computes the load module index of the load module that contains the definition of its TLS sym. */ HOWTO (R_PPC_DTPMOD32, @@ -1524,6 +1552,8 @@ ppc_elf_reloc_type_lookup (bfd *abfd ATT case BFD_RELOC_CTOR: r = R_PPC_ADDR32; break; case BFD_RELOC_PPC_TOC16: r = R_PPC_TOC16; break; case BFD_RELOC_PPC_TLS: r = R_PPC_TLS; break; + case BFD_RELOC_PPC_TLSGD: r = R_PPC_TLSGD; break; + case BFD_RELOC_PPC_TLSLD: r = R_PPC_TLSLD; break; case BFD_RELOC_PPC_DTPMOD: r = R_PPC_DTPMOD32; break; case BFD_RELOC_PPC_TPREL16: r = R_PPC_TPREL16; break; case BFD_RELOC_PPC_TPREL16_LO: r = R_PPC_TPREL16_LO; break; @@ -2345,16 +2375,34 @@ struct plt_entry bfd_vma glink_offset; }; -/* Of those relocs that might be copied as dynamic relocs, this macro +/* Of those relocs that might be copied as dynamic relocs, this function selects those that must be copied when linking a shared library, even when the symbol is local. */ -#define MUST_BE_DYN_RELOC(RTYPE) \ - ((RTYPE) != R_PPC_REL24 \ - && (RTYPE) != R_PPC_REL14 \ - && (RTYPE) != R_PPC_REL14_BRTAKEN \ - && (RTYPE) != R_PPC_REL14_BRNTAKEN \ - && (RTYPE) != R_PPC_REL32) +static int +must_be_dyn_reloc (struct bfd_link_info *info, + enum elf_ppc_reloc_type r_type) +{ + switch (r_type) + { + default: + return 1; + + case R_PPC_REL24: + case R_PPC_REL14: + case R_PPC_REL14_BRTAKEN: + case R_PPC_REL14_BRNTAKEN: + case R_PPC_REL32: + return 0; + + case R_PPC_TPREL32: + case R_PPC_TPREL16: + case R_PPC_TPREL16_LO: + case R_PPC_TPREL16_HI: + case R_PPC_TPREL16_HA: + return !info->executable; + } +} /* If ELIMINATE_COPY_RELOCS is non-zero, the linker will try to avoid copying dynamic variables from a shared lib into an app's dynbss @@ -2421,7 +2469,7 @@ struct ppc_elf_link_hash_table /* The .got.plt section (VxWorks only)*/ asection *sgotplt; - /* Shortcut to .__tls_get_addr. */ + /* Shortcut to __tls_get_addr. */ struct elf_link_hash_entry *tls_get_addr; /* The bfd that forced an old-style PLT. */ @@ -3040,6 +3088,7 @@ ppc_elf_check_relocs (bfd *abfd, const Elf_Internal_Rela *rel; const Elf_Internal_Rela *rel_end; asection *got2, *sreloc; + struct elf_link_hash_entry *tga; if (info->relocatable) return TRUE; @@ -3063,6 +3112,8 @@ ppc_elf_check_relocs (bfd *abfd, ppc_elf_howto_init (); htab = ppc_elf_hash_table (info); + tga = elf_link_hash_lookup (&htab->elf, "__tls_get_addr", + FALSE, FALSE, TRUE); symtab_hdr = &elf_tdata (abfd)->symtab_hdr; sym_hashes = elf_sym_hashes (abfd); got2 = bfd_get_section_by_name (abfd, ".got2"); @@ -3074,7 +3125,7 @@ ppc_elf_check_relocs (bfd *abfd, unsigned long r_symndx; enum elf_ppc_reloc_type r_type; struct elf_link_hash_entry *h; - int tls_type = 0; + int tls_type; r_symndx = ELF32_R_SYM (rel->r_info); if (r_symndx < symtab_hdr->sh_info) @@ -3101,14 +3152,48 @@ ppc_elf_check_relocs (bfd *abfd, BFD_ASSERT (h == htab->elf.hgot); } + tls_type = 0; r_type = ELF32_R_TYPE (rel->r_info); + if (h != NULL && h == tga) + switch (r_type) + { + default: + break; + + case R_PPC_PLTREL24: + case R_PPC_LOCAL24PC: + case R_PPC_REL24: + case R_PPC_REL14: + case R_PPC_REL14_BRTAKEN: + case R_PPC_REL14_BRNTAKEN: + case R_PPC_ADDR24: + case R_PPC_ADDR14: + case R_PPC_ADDR14_BRTAKEN: + case R_PPC_ADDR14_BRNTAKEN: + if (rel != relocs + && (ELF32_R_TYPE (rel[-1].r_info) == R_PPC_TLSGD + || ELF32_R_TYPE (rel[-1].r_info) == R_PPC_TLSLD)) + /* We have a new-style __tls_get_addr call with a marker + reloc. */ + ; + else + /* Mark this section as having an old-style call. */ + sec->has_tls_get_addr_call = 1; + break; + } + switch (r_type) { + case R_PPC_TLSGD: + case R_PPC_TLSLD: + /* These special tls relocs tie a call to __tls_get_addr with + its parameter symbol. */ + break; + case R_PPC_GOT_TLSLD16: case R_PPC_GOT_TLSLD16_LO: case R_PPC_GOT_TLSLD16_HI: case R_PPC_GOT_TLSLD16_HA: - htab->tlsld_got.refcount += 1; tls_type = TLS_TLS | TLS_LD; goto dogottls; @@ -3123,7 +3208,7 @@ ppc_elf_check_relocs (bfd *abfd, case R_PPC_GOT_TPREL16_LO: case R_PPC_GOT_TPREL16_HI: case R_PPC_GOT_TPREL16_HA: - if (info->shared) + if (!info->executable) info->flags |= DF_STATIC_TLS; tls_type = TLS_TLS | TLS_TPREL; goto dogottls; @@ -3358,7 +3443,7 @@ ppc_elf_check_relocs (bfd *abfd, /* This refers only to functions defined in the shared library. */ case R_PPC_LOCAL24PC: - if (h && h == htab->elf.hgot && htab->plt_type == PLT_UNSET) + if (h != NULL && h == htab->elf.hgot && htab->plt_type == PLT_UNSET) { htab->plt_type = PLT_OLD; htab->old_bfd = abfd; @@ -3381,7 +3466,11 @@ ppc_elf_check_relocs (bfd *abfd, /* We shouldn't really be seeing these. */ case R_PPC_TPREL32: - if (info->shared) + case R_PPC_TPREL16: + case R_PPC_TPREL16_LO: + case R_PPC_TPREL16_HI: + case R_PPC_TPREL16_HA: + if (!info->executable) info->flags |= DF_STATIC_TLS; goto dodyn; @@ -3390,14 +3479,6 @@ ppc_elf_check_relocs (bfd *abfd, case R_PPC_DTPREL32: goto dodyn; - case R_PPC_TPREL16: - case R_PPC_TPREL16_LO: - case R_PPC_TPREL16_HI: - case R_PPC_TPREL16_HA: - if (info->shared) - info->flags |= DF_STATIC_TLS; - goto dodyn; - case R_PPC_REL32: if (h == NULL && got2 != NULL @@ -3488,7 +3569,7 @@ ppc_elf_check_relocs (bfd *abfd, dynamic library if we manage to avoid copy relocs for the symbol. */ if ((info->shared - && (MUST_BE_DYN_RELOC (r_type) + && (must_be_dyn_reloc (info, r_type) || (h != NULL && (! info->symbolic || h->root.type == bfd_link_hash_defweak @@ -3583,7 +3664,7 @@ ppc_elf_check_relocs (bfd *abfd, } p->count += 1; - if (!MUST_BE_DYN_RELOC (r_type)) + if (!must_be_dyn_reloc (info, r_type)) p->pc_count += 1; } @@ -3903,9 +3984,6 @@ ppc_elf_gc_sweep_hook (bfd *abfd, case R_PPC_GOT_TLSLD16_LO: case R_PPC_GOT_TLSLD16_HI: case R_PPC_GOT_TLSLD16_HA: - htab->tlsld_got.refcount -= 1; - /* Fall thru */ - case R_PPC_GOT_TLSGD16: case R_PPC_GOT_TLSGD16_LO: case R_PPC_GOT_TLSGD16_HI: @@ -3979,7 +4057,8 @@ ppc_elf_gc_sweep_hook (bfd *abfd, return TRUE; } -/* Set htab->tls_get_addr and call the generic ELF tls_setup function. */ +/* Set plt output section type, htab->tls_get_addr, and call the + generic ELF tls_setup function. */ asection * ppc_elf_tls_setup (bfd *obfd, struct bfd_link_info *info) @@ -4000,6 +4079,43 @@ ppc_elf_tls_setup (bfd *obfd, struct bfd return _bfd_elf_tls_setup (obfd, info); } +/* Return TRUE iff REL is a branch reloc with a global symbol matching + HASH. */ + +static bfd_boolean +branch_reloc_hash_match (const bfd *ibfd, + const Elf_Internal_Rela *rel, + const struct elf_link_hash_entry *hash) +{ + Elf_Internal_Shdr *symtab_hdr = &elf_tdata (ibfd)->symtab_hdr; + enum elf_ppc_reloc_type r_type = ELF32_R_TYPE (rel->r_info); + unsigned int r_symndx = ELF32_R_SYM (rel->r_info); + + if (r_symndx >= symtab_hdr->sh_info + && (r_type == R_PPC_PLTREL24 + || r_type == R_PPC_LOCAL24PC + || r_type == R_PPC_REL14 + || r_type == R_PPC_REL14_BRTAKEN + || r_type == R_PPC_REL14_BRNTAKEN + || r_type == R_PPC_REL24 + || r_type == R_PPC_ADDR24 + || r_type == R_PPC_ADDR14 + || r_type == R_PPC_ADDR14_BRTAKEN + || r_type == R_PPC_ADDR14_BRNTAKEN)) + { + struct elf_link_hash_entry **sym_hashes = elf_sym_hashes (ibfd); + struct elf_link_hash_entry *h; + + h = sym_hashes[r_symndx - symtab_hdr->sh_info]; + while (h->root.type == bfd_link_hash_indirect + || h->root.type == bfd_link_hash_warning) + h = (struct elf_link_hash_entry *) h->root.u.i.link; + if (h == hash) + return TRUE; + } + return FALSE; +} + /* Run through all the TLS relocs looking for optimization opportunities. */ @@ -4010,187 +4126,204 @@ ppc_elf_tls_optimize (bfd *obfd ATTRIBUT bfd *ibfd; asection *sec; struct ppc_elf_link_hash_table *htab; + int pass; - if (info->relocatable || info->shared) + if (info->relocatable || !info->executable) return TRUE; htab = ppc_elf_hash_table (info); - for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next) - { - Elf_Internal_Sym *locsyms = NULL; - Elf_Internal_Shdr *symtab_hdr = &elf_tdata (ibfd)->symtab_hdr; - - for (sec = ibfd->sections; sec != NULL; sec = sec->next) - if (sec->has_tls_reloc && !bfd_is_abs_section (sec->output_section)) - { - Elf_Internal_Rela *relstart, *rel, *relend; - int expecting_tls_get_addr; + /* Make two passes through the relocs. First time check that tls + relocs involved in setting up a tls_get_addr call are indeed + followed by such a call. If they are not, exclude them from + the optimizations done on the second pass. */ + for (pass = 0; pass < 2; ++pass) + for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next) + { + Elf_Internal_Sym *locsyms = NULL; + Elf_Internal_Shdr *symtab_hdr = &elf_tdata (ibfd)->symtab_hdr; - /* Read the relocations. */ - relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL, - info->keep_memory); - if (relstart == NULL) - return FALSE; + for (sec = ibfd->sections; sec != NULL; sec = sec->next) + if (sec->has_tls_reloc && !bfd_is_abs_section (sec->output_section)) + { + Elf_Internal_Rela *relstart, *rel, *relend; - expecting_tls_get_addr = 0; - relend = relstart + sec->reloc_count; - for (rel = relstart; rel < relend; rel++) - { - enum elf_ppc_reloc_type r_type; - unsigned long r_symndx; - struct elf_link_hash_entry *h = NULL; - char *tls_mask; - char tls_set, tls_clear; - bfd_boolean is_local; + /* Read the relocations. */ + relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL, + info->keep_memory); + if (relstart == NULL) + return FALSE; - r_symndx = ELF32_R_SYM (rel->r_info); - if (r_symndx >= symtab_hdr->sh_info) - { - struct elf_link_hash_entry **sym_hashes; + relend = relstart + sec->reloc_count; + for (rel = relstart; rel < relend; rel++) + { + enum elf_ppc_reloc_type r_type; + unsigned long r_symndx; + struct elf_link_hash_entry *h = NULL; + char *tls_mask; + char tls_set, tls_clear; + bfd_boolean is_local; + int expecting_tls_get_addr; + bfd_signed_vma *got_count; - sym_hashes = elf_sym_hashes (ibfd); - h = sym_hashes[r_symndx - symtab_hdr->sh_info]; - while (h->root.type == bfd_link_hash_indirect - || h->root.type == bfd_link_hash_warning) - h = (struct elf_link_hash_entry *) h->root.u.i.link; - } + r_symndx = ELF32_R_SYM (rel->r_info); + if (r_symndx >= symtab_hdr->sh_info) + { + struct elf_link_hash_entry **sym_hashes; - is_local = FALSE; - if (h == NULL - || !h->def_dynamic) - is_local = TRUE; + sym_hashes = elf_sym_hashes (ibfd); + h = sym_hashes[r_symndx - symtab_hdr->sh_info]; + while (h->root.type == bfd_link_hash_indirect + || h->root.type == bfd_link_hash_warning) + h = (struct elf_link_hash_entry *) h->root.u.i.link; + } - r_type = ELF32_R_TYPE (rel->r_info); - switch (r_type) - { - case R_PPC_GOT_TLSLD16: - case R_PPC_GOT_TLSLD16_LO: - case R_PPC_GOT_TLSLD16_HI: - case R_PPC_GOT_TLSLD16_HA: - /* These relocs should never be against a symbol - defined in a shared lib. Leave them alone if - that turns out to be the case. */ - expecting_tls_get_addr = 0; - htab->tlsld_got.refcount -= 1; - if (!is_local) - continue; + expecting_tls_get_addr = 0; + is_local = FALSE; + if (h == NULL + || !h->def_dynamic) + is_local = TRUE; - /* LD -> LE */ - tls_set = 0; - tls_clear = TLS_LD; - expecting_tls_get_addr = 1; - break; + r_type = ELF32_R_TYPE (rel->r_info); + switch (r_type) + { + case R_PPC_GOT_TLSLD16: + case R_PPC_GOT_TLSLD16_LO: + expecting_tls_get_addr = 1; + /* Fall thru */ + + case R_PPC_GOT_TLSLD16_HI: + case R_PPC_GOT_TLSLD16_HA: + /* These relocs should never be against a symbol + defined in a shared lib. Leave them alone if + that turns out to be the case. */ + if (!is_local) + continue; - case R_PPC_GOT_TLSGD16: - case R_PPC_GOT_TLSGD16_LO: - case R_PPC_GOT_TLSGD16_HI: - case R_PPC_GOT_TLSGD16_HA: - if (is_local) - /* GD -> LE */ + /* LD -> LE */ tls_set = 0; - else - /* GD -> IE */ - tls_set = TLS_TLS | TLS_TPRELGD; - tls_clear = TLS_GD; - expecting_tls_get_addr = 1; - break; + tls_clear = TLS_LD; + break; - case R_PPC_GOT_TPREL16: - case R_PPC_GOT_TPREL16_LO: - case R_PPC_GOT_TPREL16_HI: - case R_PPC_GOT_TPREL16_HA: - expecting_tls_get_addr = 0; - if (is_local) - { - /* IE -> LE */ + case R_PPC_GOT_TLSGD16: + case R_PPC_GOT_TLSGD16_LO: + expecting_tls_get_addr = 1; + /* Fall thru */ + + case R_PPC_GOT_TLSGD16_HI: + case R_PPC_GOT_TLSGD16_HA: + if (is_local) + /* GD -> LE */ tls_set = 0; - tls_clear = TLS_TPREL; - break; - } - else + else + /* GD -> IE */ + tls_set = TLS_TLS | TLS_TPRELGD; + tls_clear = TLS_GD; + break; + + case R_PPC_GOT_TPREL16: + case R_PPC_GOT_TPREL16_LO: + case R_PPC_GOT_TPREL16_HI: + case R_PPC_GOT_TPREL16_HA: + if (is_local) + { + /* IE -> LE */ + tls_set = 0; + tls_clear = TLS_TPREL; + break; + } + else + continue; + + default: continue; + } - case R_PPC_REL14: - case R_PPC_REL14_BRTAKEN: - case R_PPC_REL14_BRNTAKEN: - case R_PPC_REL24: - if (expecting_tls_get_addr - && h != NULL - && h == htab->tls_get_addr) - { - struct plt_entry *ent = find_plt_ent (h, NULL, 0); - if (ent != NULL && ent->plt.refcount > 0) - ent->plt.refcount -= 1; - } - expecting_tls_get_addr = 0; - continue; + if (pass == 0) + { + if (!expecting_tls_get_addr + || !sec->has_tls_get_addr_call) + continue; + + if (rel + 1 < relend + && branch_reloc_hash_match (ibfd, rel + 1, + htab->tls_get_addr)) + continue; + + /* Uh oh, we didn't find the expected call. We + could just mark this symbol to exclude it + from tls optimization but it's safer to skip + the entire section. */ + sec->has_tls_reloc = 0; + break; + } - default: - expecting_tls_get_addr = 0; - continue; - } + if (h != NULL) + { + tls_mask = &ppc_elf_hash_entry (h)->tls_mask; + got_count = &h->got.refcount; + } + else + { + Elf_Internal_Sym *sym; + bfd_signed_vma *lgot_refs; + char *lgot_masks; - if (h != NULL) - { - if (tls_set == 0) - { - /* We managed to get rid of a got entry. */ - if (h->got.refcount > 0) - h->got.refcount -= 1; - } - tls_mask = &ppc_elf_hash_entry (h)->tls_mask; - } - else - { - Elf_Internal_Sym *sym; - bfd_signed_vma *lgot_refs; - char *lgot_masks; + if (locsyms == NULL) + { + locsyms = (Elf_Internal_Sym *) symtab_hdr->contents; + if (locsyms == NULL) + locsyms = bfd_elf_get_elf_syms (ibfd, symtab_hdr, + symtab_hdr->sh_info, + 0, NULL, NULL, NULL); + if (locsyms == NULL) + { + if (elf_section_data (sec)->relocs != relstart) + free (relstart); + return FALSE; + } + } + sym = locsyms + r_symndx; + lgot_refs = elf_local_got_refcounts (ibfd); + if (lgot_refs == NULL) + abort (); + lgot_masks = (char *) (lgot_refs + symtab_hdr->sh_info); + tls_mask = &lgot_masks[r_symndx]; + got_count = &lgot_refs[r_symndx]; + } - if (locsyms == NULL) - { - locsyms = (Elf_Internal_Sym *) symtab_hdr->contents; - if (locsyms == NULL) - locsyms = bfd_elf_get_elf_syms (ibfd, symtab_hdr, - symtab_hdr->sh_info, - 0, NULL, NULL, NULL); - if (locsyms == NULL) - { - if (elf_section_data (sec)->relocs != relstart) - free (relstart); - return FALSE; - } - } - sym = locsyms + r_symndx; - lgot_refs = elf_local_got_refcounts (ibfd); - if (lgot_refs == NULL) - abort (); - if (tls_set == 0) - { - /* We managed to get rid of a got entry. */ - if (lgot_refs[r_symndx] > 0) - lgot_refs[r_symndx] -= 1; - } - lgot_masks = (char *) (lgot_refs + symtab_hdr->sh_info); - tls_mask = &lgot_masks[r_symndx]; - } + if (tls_set == 0) + { + /* We managed to get rid of a got entry. */ + if (*got_count > 0) + *got_count -= 1; + } - *tls_mask |= tls_set; - *tls_mask &= ~tls_clear; - } + if (expecting_tls_get_addr) + { + struct plt_entry *ent; - if (elf_section_data (sec)->relocs != relstart) - free (relstart); - } + ent = find_plt_ent (htab->tls_get_addr, NULL, 0); + if (ent != NULL && ent->plt.refcount > 0) + ent->plt.refcount -= 1; + } - if (locsyms != NULL - && (symtab_hdr->contents != (unsigned char *) locsyms)) - { - if (!info->keep_memory) - free (locsyms); - else - symtab_hdr->contents = (unsigned char *) locsyms; - } - } + *tls_mask |= tls_set; + *tls_mask &= ~tls_clear; + } + + if (elf_section_data (sec)->relocs != relstart) + free (relstart); + } + + if (locsyms != NULL + && (symtab_hdr->contents != (unsigned char *) locsyms)) + { + if (!info->keep_memory) + free (locsyms); + else + symtab_hdr->contents = (unsigned char *) locsyms; + } + } return TRUE; } @@ -4615,8 +4748,11 @@ allocate_dynrelocs (struct elf_link_hash if (eh->tls_mask == (TLS_TLS | TLS_LD) && !eh->elf.def_dynamic) - /* If just an LD reloc, we'll just use htab->tlsld_got.offset. */ - eh->elf.got.offset = (bfd_vma) -1; + { + /* If just an LD reloc, we'll just use htab->tlsld_got.offset. */ + htab->tlsld_got.refcount += 1; + eh->elf.got.offset = (bfd_vma) -1; + } else { bfd_boolean dyn; @@ -4664,7 +4800,7 @@ allocate_dynrelocs (struct elf_link_hash if (info->shared) { /* Relocs that use pc_count are those that appear on a call insn, - or certain REL relocs (see MUST_BE_DYN_RELOC) that can be + or certain REL relocs (see must_be_dyn_reloc) that can be generated via assembly. We want calls to protected symbols to resolve directly to the function rather than going via the plt. If people want function pointer comparisons to work as expected @@ -4891,6 +5027,9 @@ ppc_elf_size_dynamic_sections (bfd *outp *local_got = (bfd_vma) -1; } + /* Allocate space for global sym dynamic relocs. */ + elf_link_hash_traverse (elf_hash_table (info), allocate_dynrelocs, info); + if (htab->tlsld_got.refcount > 0) { htab->tlsld_got.offset = allocate_got (htab, 8); @@ -4900,9 +5039,6 @@ ppc_elf_size_dynamic_sections (bfd *outp else htab->tlsld_got.offset = (bfd_vma) -1; - /* Allocate space for global sym dynamic relocs. */ - elf_link_hash_traverse (elf_hash_table (info), allocate_dynrelocs, info); - if (htab->got != NULL && htab->plt_type != PLT_VXWORKS) { unsigned int g_o_t = 32768; @@ -5754,16 +5890,13 @@ ppc_elf_relocate_section (bfd *output_bf for the final instruction stream. */ tls_mask = 0; tls_gd = 0; - if (IS_PPC_TLS_RELOC (r_type)) - { - if (h != NULL) - tls_mask = ((struct ppc_elf_link_hash_entry *) h)->tls_mask; - else if (local_got_offsets != NULL) - { - char *lgot_masks; - lgot_masks = (char *) (local_got_offsets + symtab_hdr->sh_info); - tls_mask = lgot_masks[r_symndx]; - } + if (h != NULL) + tls_mask = ((struct ppc_elf_link_hash_entry *) h)->tls_mask; + else if (local_got_offsets != NULL) + { + char *lgot_masks; + lgot_masks = (char *) (local_got_offsets + symtab_hdr->sh_info); + tls_mask = lgot_masks[r_symndx]; } /* Ensure reloc mapping code below stays sane. */ @@ -5870,85 +6003,147 @@ ppc_elf_relocate_section (bfd *output_bf case R_PPC_GOT_TLSGD16_LO: tls_gd = TLS_TPRELGD; if (tls_mask != 0 && (tls_mask & TLS_GD) == 0) - goto tls_get_addr_check; + goto tls_ldgd_opt; break; case R_PPC_GOT_TLSLD16: case R_PPC_GOT_TLSLD16_LO: if (tls_mask != 0 && (tls_mask & TLS_LD) == 0) { - tls_get_addr_check: - if (rel + 1 < relend) - { - enum elf_ppc_reloc_type r_type2; - unsigned long r_symndx2; - struct elf_link_hash_entry *h2; - bfd_vma insn1, insn2; - bfd_vma offset; - - /* The next instruction should be a call to - __tls_get_addr. Peek at the reloc to be sure. */ - r_type2 = ELF32_R_TYPE (rel[1].r_info); - r_symndx2 = ELF32_R_SYM (rel[1].r_info); - if (r_symndx2 < symtab_hdr->sh_info - || (r_type2 != R_PPC_REL14 - && r_type2 != R_PPC_REL14_BRTAKEN - && r_type2 != R_PPC_REL14_BRNTAKEN - && r_type2 != R_PPC_REL24 - && r_type2 != R_PPC_PLTREL24)) - break; + unsigned int insn1, insn2; + bfd_vma offset; - h2 = sym_hashes[r_symndx2 - symtab_hdr->sh_info]; - while (h2->root.type == bfd_link_hash_indirect - || h2->root.type == bfd_link_hash_warning) - h2 = (struct elf_link_hash_entry *) h2->root.u.i.link; - if (h2 == NULL || h2 != htab->tls_get_addr) - break; - - /* OK, it checks out. Replace the call. */ - offset = rel[1].r_offset; + tls_ldgd_opt: + offset = (bfd_vma) -1; + /* If not using the newer R_PPC_TLSGD/LD to mark + __tls_get_addr calls, we must trust that the call + stays with its arg setup insns, ie. that the next + reloc is the __tls_get_addr call associated with + the current reloc. Edit both insns. */ + if (input_section->has_tls_get_addr_call + && rel + 1 < relend + && branch_reloc_hash_match (input_bfd, rel + 1, + htab->tls_get_addr)) + offset = rel[1].r_offset; + if ((tls_mask & tls_gd) != 0) + { + /* IE */ insn1 = bfd_get_32 (output_bfd, contents + rel->r_offset - d_offset); - if ((tls_mask & tls_gd) != 0) + insn1 &= (1 << 26) - 1; + insn1 |= 32 << 26; /* lwz */ + if (offset != (bfd_vma) -1) { - /* IE */ - insn1 &= (1 << 26) - 1; - insn1 |= 32 << 26; /* lwz */ + rel[1].r_info + = ELF32_R_INFO (ELF32_R_SYM (rel[1].r_info), + R_PPC_NONE); insn2 = 0x7c631214; /* add 3,3,2 */ - rel[1].r_info = ELF32_R_INFO (r_symndx2, R_PPC_NONE); - rel[1].r_addend = 0; - r_type = (((r_type - (R_PPC_GOT_TLSGD16 & 3)) & 3) - + R_PPC_GOT_TPREL16); - rel->r_info = ELF32_R_INFO (r_symndx, r_type); + bfd_put_32 (output_bfd, insn2, contents + offset); } - else + r_type = (((r_type - (R_PPC_GOT_TLSGD16 & 3)) & 3) + + R_PPC_GOT_TPREL16); + rel->r_info = ELF32_R_INFO (r_symndx, r_type); + } + else + { + /* LE */ + insn1 = 0x3c620000; /* addis 3,2,0 */ + if (tls_gd == 0) { - /* LE */ - insn1 = 0x3c620000; /* addis 3,2,0 */ - insn2 = 0x38630000; /* addi 3,3,0 */ - if (tls_gd == 0) - { - /* Was an LD reloc. */ - r_symndx = 0; - rel->r_addend = htab->elf.tls_sec->vma + DTP_OFFSET; - } - r_type = R_PPC_TPREL16_HA; - rel->r_info = ELF32_R_INFO (r_symndx, r_type); - rel[1].r_info = ELF32_R_INFO (r_symndx, - R_PPC_TPREL16_LO); - rel[1].r_offset += d_offset; - rel[1].r_addend = rel->r_addend; + /* Was an LD reloc. */ + for (r_symndx = 0; + r_symndx < symtab_hdr->sh_info; + r_symndx++) + if (local_sections[r_symndx] == sec) + break; + if (r_symndx >= symtab_hdr->sh_info) + r_symndx = 0; + rel->r_addend = htab->elf.tls_sec->vma + DTP_OFFSET; + if (r_symndx != 0) + rel->r_addend -= (local_syms[r_symndx].st_value + + sec->output_offset + + sec->output_section->vma); } - bfd_put_32 (output_bfd, insn1, contents + rel->r_offset - d_offset); - bfd_put_32 (output_bfd, insn2, contents + offset); - if (tls_gd == 0) + r_type = R_PPC_TPREL16_HA; + rel->r_info = ELF32_R_INFO (r_symndx, r_type); + if (offset != (bfd_vma) -1) { - /* We changed the symbol on an LD reloc. Start over - in order to get h, sym, sec etc. right. */ - rel--; - continue; + rel[1].r_info = ELF32_R_INFO (r_symndx, R_PPC_TPREL16_LO); + rel[1].r_offset = offset + d_offset; + rel[1].r_addend = rel->r_addend; + insn2 = 0x38630000; /* addi 3,3,0 */ + bfd_put_32 (output_bfd, insn2, contents + offset); } } + bfd_put_32 (output_bfd, insn1, + contents + rel->r_offset - d_offset); + if (tls_gd == 0) + { + /* We changed the symbol on an LD reloc. Start over + in order to get h, sym, sec etc. right. */ + rel--; + continue; + } + } + break; + + case R_PPC_TLSGD: + if (tls_mask != 0 && (tls_mask & TLS_GD) == 0) + { + unsigned int insn2; *** DIFF OUTPUT TRUNCATED AT 1000 LINES ***
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