diff options
Diffstat (limited to 'bfd')
| -rw-r--r-- | bfd/ChangeLog | 25 | ||||
| -rw-r--r-- | bfd/bfd-in2.h | 22 | ||||
| -rw-r--r-- | bfd/elf32-s390.c | 823 | ||||
| -rw-r--r-- | bfd/elf64-s390.c | 853 | ||||
| -rw-r--r-- | bfd/libbfd.h | 20 | ||||
| -rw-r--r-- | bfd/reloc.c | 43 |
6 files changed, 1662 insertions, 124 deletions
diff --git a/bfd/ChangeLog b/bfd/ChangeLog index caf1337..d94869b 100644 --- a/bfd/ChangeLog +++ b/bfd/ChangeLog @@ -1,3 +1,28 @@ +2003-01-24 Martin Schwidefsky <schwidefsky@de.ibm.com> + + * bfd-in2.h: Regenerate. + * elf32-s390.c (elf_s390_mkobject, elf_s390_tls_transition, + s390_tls_reloc, dtpoff_base, tpoff, invalid_tls_insn): New functions. + (elf_howto_table): Add TLS relocs. + (elf_s390_reloc_type_lookup): Likewise. + (elf_s390_link_hash_entry): Add tls_type. + (elf_s390_hash_entry, elf_s390_obj_tdata, elf_s390_local_got_tls_type): + New macros. + (elf_s390_link_hash_table): Add tls_ldm_got. + (link_hash_newfunc): Initialize tls_type. + (elf_s390_link_hash_table_create): Initialize refcount of tls_ldm_got. + (elf_s390_copy_indirect_symbol): Copy tls_type information. + (elf_s390_check_relocs): Support TLS relocs. + (elf_s390_gc_sweep_hook): Likewise. + (allocate_dynrelocs): Likewise. + (elf_s390_size_dynamic_sections): Likewise. + (elf_s390_relocate_section): Likewise. + (elf_s390_finish_dynamic_symbol): Likewise. + (bfd_elf32_mkobject): Define for TLS. + * elf64-s390.c: Same changes as for elf32-s390.c. + * libbfd.h: Regenerate. + * reloc.c: Add s390 TLS relocations. + 2003-01-24 Charles Lepple clepple.ghz.cc * aclocal.m4: Fix name of --enable-install-libbfd switch. diff --git a/bfd/bfd-in2.h b/bfd/bfd-in2.h index b195ac6..f4eccf2 100644 --- a/bfd/bfd-in2.h +++ b/bfd/bfd-in2.h @@ -3024,6 +3024,28 @@ into 22 bits. */ /* 64-bit rel. offset from the GOT to a PLT entry. */ BFD_RELOC_390_PLTOFF64, +/* s390 tls relocations. */ + BFD_RELOC_390_TLS_LOAD, + BFD_RELOC_390_TLS_GDCALL, + BFD_RELOC_390_TLS_LDCALL, + BFD_RELOC_390_TLS_GD32, + BFD_RELOC_390_TLS_GD64, + BFD_RELOC_390_TLS_GOTIE12, + BFD_RELOC_390_TLS_GOTIE32, + BFD_RELOC_390_TLS_GOTIE64, + BFD_RELOC_390_TLS_LDM32, + BFD_RELOC_390_TLS_LDM64, + BFD_RELOC_390_TLS_IE32, + BFD_RELOC_390_TLS_IE64, + BFD_RELOC_390_TLS_IEENT, + BFD_RELOC_390_TLS_LE32, + BFD_RELOC_390_TLS_LE64, + BFD_RELOC_390_TLS_LDO32, + BFD_RELOC_390_TLS_LDO64, + BFD_RELOC_390_TLS_DTPMOD, + BFD_RELOC_390_TLS_DTPOFF, + BFD_RELOC_390_TLS_TPOFF, + /* Scenix IP2K - 9-bit register number / data address */ BFD_RELOC_IP2K_FR9, diff --git a/bfd/elf32-s390.c b/bfd/elf32-s390.c index fa3ff2b..e8d94af 100644 --- a/bfd/elf32-s390.c +++ b/bfd/elf32-s390.c @@ -72,10 +72,22 @@ static enum elf_reloc_type_class elf_s390_reloc_type_class PARAMS ((const Elf_Internal_Rela *)); static bfd_boolean elf_s390_finish_dynamic_sections PARAMS ((bfd *, struct bfd_link_info *)); +static bfd_boolean elf_s390_mkobject + PARAMS ((bfd *)); static bfd_boolean elf_s390_object_p PARAMS ((bfd *)); static bfd_boolean elf_s390_grok_prstatus PARAMS ((bfd *, Elf_Internal_Note *)); +static int elf_s390_tls_transition + PARAMS ((struct bfd_link_info *, int, int)); +static bfd_reloc_status_type s390_tls_reloc + PARAMS ((bfd *, arelent *, asymbol *, PTR, asection *, bfd *, char **)); +static bfd_vma dtpoff_base + PARAMS ((struct bfd_link_info *)); +static bfd_vma tpoff + PARAMS ((struct bfd_link_info *, bfd_vma)); +static void invalid_tls_insn + PARAMS ((bfd *, asection *, Elf_Internal_Rela *)); #include "elf/s390.h" @@ -162,6 +174,40 @@ static reloc_howto_type elf_howto_table[] = HOWTO(R_390_PLTOFF32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield, bfd_elf_generic_reloc, "R_390_PLTOFF32", FALSE, 0,0xffffffff, FALSE), EMPTY_HOWTO (R_390_PLTOFF64), /* Empty entry for R_390_PLTOFF64. */ + HOWTO(R_390_TLS_LOAD, 0, 0, 0, FALSE, 0, complain_overflow_dont, + s390_tls_reloc, "R_390_TLS_LOAD", FALSE, 0, 0, FALSE), + HOWTO(R_390_TLS_GDCALL, 0, 0, 0, FALSE, 0, complain_overflow_dont, + s390_tls_reloc, "R_390_TLS_GDCALL", FALSE, 0, 0, FALSE), + HOWTO(R_390_TLS_LDCALL, 0, 0, 0, FALSE, 0, complain_overflow_dont, + s390_tls_reloc, "R_390_TLS_LDCALL", FALSE, 0, 0, FALSE), + HOWTO(R_390_TLS_GD32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield, + bfd_elf_generic_reloc, "R_390_TLS_GD32", FALSE, 0, 0xffffffff, FALSE), + EMPTY_HOWTO (R_390_TLS_GD64), /* Empty entry for R_390_TLS_GD64. */ + HOWTO(R_390_TLS_GOTIE12, 0, 1, 12, FALSE, 0, complain_overflow_dont, + bfd_elf_generic_reloc, "R_390_TLS_GOTIE12", FALSE, 0, 0x00000fff, FALSE), + HOWTO(R_390_TLS_GOTIE32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield, + bfd_elf_generic_reloc, "R_390_TLS_GOTIE32", FALSE, 0, 0xffffffff, FALSE), + EMPTY_HOWTO (R_390_TLS_GOTIE64), /* Empty entry for R_390_TLS_GOTIE64. */ + HOWTO(R_390_TLS_LDM32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield, + bfd_elf_generic_reloc, "R_390_TLS_LDM32", FALSE, 0, 0xffffffff, FALSE), + EMPTY_HOWTO (R_390_TLS_LDM64), /* Empty entry for R_390_TLS_LDM64. */ + HOWTO(R_390_TLS_IE32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield, + bfd_elf_generic_reloc, "R_390_TLS_IE32", FALSE, 0, 0xffffffff, FALSE), + EMPTY_HOWTO (R_390_TLS_IE64), /* Empty entry for R_390_TLS_IE64. */ + HOWTO(R_390_TLS_IEENT, 1, 2, 32, TRUE, 0, complain_overflow_bitfield, + bfd_elf_generic_reloc, "R_390_TLS_IEENT", FALSE, 0, 0xffffffff, TRUE), + HOWTO(R_390_TLS_LE32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield, + bfd_elf_generic_reloc, "R_390_TLS_LE32", FALSE, 0, 0xffffffff, FALSE), + EMPTY_HOWTO (R_390_TLS_LE64), /* Empty entry for R_390_TLS_LE64. */ + HOWTO(R_390_TLS_LDO32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield, + bfd_elf_generic_reloc, "R_390_TLS_LDO32", FALSE, 0, 0xffffffff, FALSE), + EMPTY_HOWTO (R_390_TLS_LDO64), /* Empty entry for R_390_TLS_LDO64. */ + HOWTO(R_390_TLS_DTPMOD, 0, 2, 32, FALSE, 0, complain_overflow_bitfield, + bfd_elf_generic_reloc, "R_390_TLS_DTPMOD", FALSE, 0, 0xffffffff, FALSE), + HOWTO(R_390_TLS_DTPOFF, 0, 2, 32, FALSE, 0, complain_overflow_bitfield, + bfd_elf_generic_reloc, "R_390_TLS_DTPOFF", FALSE, 0, 0xffffffff, FALSE), + HOWTO(R_390_TLS_TPOFF, 0, 2, 32, FALSE, 0, complain_overflow_bitfield, + bfd_elf_generic_reloc, "R_390_TLS_TPOFF", FALSE, 0, 0xffffffff, FALSE), }; /* GNU extension to record C++ vtable hierarchy. */ @@ -239,6 +285,34 @@ elf_s390_reloc_type_lookup (abfd, code) return &elf_howto_table[(int) R_390_PLTOFF16]; case BFD_RELOC_390_PLTOFF32: return &elf_howto_table[(int) R_390_PLTOFF32]; + case BFD_RELOC_390_TLS_LOAD: + return &elf_howto_table[(int) R_390_TLS_LOAD]; + case BFD_RELOC_390_TLS_GDCALL: + return &elf_howto_table[(int) R_390_TLS_GDCALL]; + case BFD_RELOC_390_TLS_LDCALL: + return &elf_howto_table[(int) R_390_TLS_LDCALL]; + case BFD_RELOC_390_TLS_GD32: + return &elf_howto_table[(int) R_390_TLS_GD32]; + case BFD_RELOC_390_TLS_GOTIE12: + return &elf_howto_table[(int) R_390_TLS_GOTIE12]; + case BFD_RELOC_390_TLS_GOTIE32: + return &elf_howto_table[(int) R_390_TLS_GOTIE32]; + case BFD_RELOC_390_TLS_LDM32: + return &elf_howto_table[(int) R_390_TLS_LDM32]; + case BFD_RELOC_390_TLS_IE32: + return &elf_howto_table[(int) R_390_TLS_IE32]; + case BFD_RELOC_390_TLS_IEENT: + return &elf_howto_table[(int) R_390_TLS_IEENT]; + case BFD_RELOC_390_TLS_LE32: + return &elf_howto_table[(int) R_390_TLS_LE32]; + case BFD_RELOC_390_TLS_LDO32: + return &elf_howto_table[(int) R_390_TLS_LDO32]; + case BFD_RELOC_390_TLS_DTPMOD: + return &elf_howto_table[(int) R_390_TLS_DTPMOD]; + case BFD_RELOC_390_TLS_DTPOFF: + return &elf_howto_table[(int) R_390_TLS_DTPOFF]; + case BFD_RELOC_390_TLS_TPOFF: + return &elf_howto_table[(int) R_390_TLS_TPOFF]; case BFD_RELOC_VTABLE_INHERIT: return &elf32_s390_vtinherit_howto; case BFD_RELOC_VTABLE_ENTRY: @@ -274,6 +348,23 @@ elf_s390_info_to_howto (abfd, cache_ptr, dst) } } +/* A relocation function which doesn't do anything. */ +static bfd_reloc_status_type +s390_tls_reloc (abfd, reloc_entry, symbol, data, input_section, + output_bfd, error_message) + bfd *abfd ATTRIBUTE_UNUSED; + arelent *reloc_entry; + asymbol *symbol ATTRIBUTE_UNUSED; + PTR data ATTRIBUTE_UNUSED; + asection *input_section; + bfd *output_bfd; + char **error_message ATTRIBUTE_UNUSED; +{ + if (output_bfd) + reloc_entry->address += input_section->output_offset; + return bfd_reloc_ok; +} + static bfd_boolean elf_s390_is_local_label_name (abfd, name) bfd *abfd; @@ -476,8 +567,59 @@ struct elf_s390_link_hash_entry /* Number of GOTPLT references for a function. */ bfd_signed_vma gotplt_refcount; + +#define GOT_UNKNOWN 0 +#define GOT_NORMAL 1 +#define GOT_TLS_GD 2 +#define GOT_TLS_IE 3 +#define GOT_TLS_IE_NLT 4 + unsigned char tls_type; }; +#define elf_s390_hash_entry(ent) \ + ((struct elf_s390_link_hash_entry *)(ent)) + +struct elf_s390_obj_tdata +{ + struct elf_obj_tdata root; + + /* tls_type for each local got entry. */ + char *local_got_tls_type; +}; + +#define elf_s390_tdata(abfd) \ + ((struct elf_s390_obj_tdata *) (abfd)->tdata.any) + +#define elf_s390_local_got_tls_type(abfd) \ + (elf_s390_tdata (abfd)->local_got_tls_type) + +static bfd_boolean +elf_s390_mkobject (abfd) + bfd *abfd; +{ + bfd_size_type amt = sizeof (struct elf_s390_obj_tdata); + abfd->tdata.any = bfd_zalloc (abfd, amt); + if (abfd->tdata.any == NULL) + return FALSE; + return TRUE; +} + +static bfd_boolean +elf_s390_object_p (abfd) + bfd *abfd; +{ + /* Allocate our special target data. */ + struct elf_s390_obj_tdata *new_tdata; + bfd_size_type amt = sizeof (struct elf_s390_obj_tdata); + new_tdata = bfd_zalloc (abfd, amt); + if (new_tdata == NULL) + return FALSE; + new_tdata->root = *abfd->tdata.elf_obj_data; + abfd->tdata.any = new_tdata; + /* Set the right machine number for an s390 elf32 file. */ + return bfd_default_set_arch_mach (abfd, bfd_arch_s390, bfd_mach_s390_31); +} + /* s390 ELF linker hash table. */ struct elf_s390_link_hash_table @@ -493,6 +635,11 @@ struct elf_s390_link_hash_table asection *sdynbss; asection *srelbss; + union { + bfd_signed_vma refcount; + bfd_vma offset; + } tls_ldm_got; + /* Small local sym to section mapping cache. */ struct sym_sec_cache sym_sec; }; @@ -529,6 +676,7 @@ link_hash_newfunc (entry, table, string) eh = (struct elf_s390_link_hash_entry *) entry; eh->dyn_relocs = NULL; eh->gotplt_refcount = 0; + eh->tls_type = GOT_UNKNOWN; } return entry; @@ -560,6 +708,7 @@ elf_s390_link_hash_table_create (abfd) ret->srelplt = NULL; ret->sdynbss = NULL; ret->srelbss = NULL; + ret->tls_ldm_got.refcount = 0; ret->sym_sec.abfd = NULL; return &ret->elf.root; @@ -672,9 +821,43 @@ elf_s390_copy_indirect_symbol (bed, dir, ind) eind->dyn_relocs = NULL; } + if (ind->root.type == bfd_link_hash_indirect + && dir->got.refcount <= 0) + { + edir->tls_type = eind->tls_type; + eind->tls_type = GOT_UNKNOWN; + } + _bfd_elf_link_hash_copy_indirect (bed, dir, ind); } +static int +elf_s390_tls_transition (info, r_type, is_local) + struct bfd_link_info *info; + int r_type; + int is_local; +{ + if (info->shared) + return r_type; + + switch (r_type) + { + case R_390_TLS_GD32: + case R_390_TLS_IE32: + if (is_local) + return R_390_TLS_LE32; + return R_390_TLS_IE32; + case R_390_TLS_GOTIE32: + if (is_local) + return R_390_TLS_LE32; + return R_390_TLS_GOTIE32; + case R_390_TLS_LDM32: + return R_390_TLS_LE32; + } + + return r_type; +} + /* Look through the relocs for a section during the first phase, and allocate space in the global offset table or procedure linkage table. */ @@ -693,6 +876,7 @@ elf_s390_check_relocs (abfd, info, sec, relocs) const Elf_Internal_Rela *rel_end; asection *sreloc; bfd_signed_vma *local_got_refcounts; + int tls_type, old_tls_type; if (info->relocateable) return TRUE; @@ -707,6 +891,7 @@ elf_s390_check_relocs (abfd, info, sec, relocs) rel_end = relocs + sec->reloc_count; for (rel = relocs; rel < rel_end; rel++) { + unsigned int r_type; unsigned long r_symndx; struct elf_link_hash_entry *h; @@ -727,7 +912,10 @@ elf_s390_check_relocs (abfd, info, sec, relocs) /* Create got section and local_got_refcounts array if they are needed. */ - switch (ELF32_R_TYPE (rel->r_info)) + r_type = elf_s390_tls_transition (info, + ELF32_R_TYPE (rel->r_info), + h == NULL); + switch (r_type) { case R_390_GOT12: case R_390_GOT16: @@ -737,18 +925,26 @@ elf_s390_check_relocs (abfd, info, sec, relocs) case R_390_GOTPLT16: case R_390_GOTPLT32: case R_390_GOTPLTENT: + case R_390_TLS_GD32: + case R_390_TLS_GOTIE12: + case R_390_TLS_GOTIE32: + case R_390_TLS_IEENT: + case R_390_TLS_IE32: + case R_390_TLS_LDM32: if (h == NULL && local_got_refcounts == NULL) { bfd_size_type size; size = symtab_hdr->sh_info; - size *= sizeof (bfd_signed_vma); + size *= (sizeof (bfd_signed_vma) + sizeof(char)); local_got_refcounts = ((bfd_signed_vma *) bfd_zalloc (abfd, size)); if (local_got_refcounts == NULL) return FALSE; elf_local_got_refcounts (abfd) = local_got_refcounts; + elf_s390_local_got_tls_type (abfd) + = (char *) (local_got_refcounts + symtab_hdr->sh_info); } /* Fall through. */ case R_390_GOTOFF16: @@ -764,19 +960,8 @@ elf_s390_check_relocs (abfd, info, sec, relocs) } } - switch (ELF32_R_TYPE (rel->r_info)) + switch (r_type) { - case R_390_GOT12: - case R_390_GOT16: - case R_390_GOT32: - case R_390_GOTENT: - /* This symbol requires a global offset table entry. */ - if (h != NULL) - h->got.refcount += 1; - else - local_got_refcounts[r_symndx] += 1; - break; - case R_390_GOTOFF16: case R_390_GOTOFF32: case R_390_GOTPC: @@ -827,6 +1012,89 @@ elf_s390_check_relocs (abfd, info, sec, relocs) local_got_refcounts[r_symndx] += 1; break; + case R_390_TLS_LDM32: + htab->tls_ldm_got.refcount += 1; + break; + + case R_390_TLS_IE32: + case R_390_TLS_GOTIE12: + case R_390_TLS_GOTIE32: + case R_390_TLS_IEENT: + if (info->shared) + info->flags |= DF_STATIC_TLS; + /* Fall through */ + + case R_390_GOT12: + case R_390_GOT16: + case R_390_GOT32: + case R_390_GOTENT: + case R_390_TLS_GD32: + /* This symbol requires a global offset table entry. */ + switch (r_type) + { + default: + case R_390_GOT12: + case R_390_GOT16: + case R_390_GOT32: + case R_390_GOTENT: + tls_type = GOT_NORMAL; + break; + case R_390_TLS_GD32: + tls_type = GOT_TLS_GD; + break; + case R_390_TLS_IE32: + case R_390_TLS_GOTIE32: + tls_type = GOT_TLS_IE; + break; + case R_390_TLS_GOTIE12: + case R_390_TLS_IEENT: + tls_type = GOT_TLS_IE_NLT; + break; + } + + if (h != NULL) + { + h->got.refcount += 1; + old_tls_type = elf_s390_hash_entry(h)->tls_type; + } + else + { + local_got_refcounts[r_symndx] += 1; + old_tls_type = elf_s390_local_got_tls_type (abfd) [r_symndx]; + } + /* If a TLS symbol is accessed using IE at least once, + there is no point to use dynamic model for it. */ + if (old_tls_type != tls_type && old_tls_type != GOT_UNKNOWN) + { + if (old_tls_type == GOT_NORMAL || tls_type == GOT_NORMAL) + { + (*_bfd_error_handler) + (_("%s: `%s' accessed both as normal and thread local symbol"), + bfd_archive_filename (abfd), h->root.root.string); + return FALSE; + } + if (old_tls_type > tls_type) + tls_type = old_tls_type; + } + + if (old_tls_type != tls_type) + { + if (h != NULL) + elf_s390_hash_entry (h)->tls_type = tls_type; + else + elf_s390_local_got_tls_type (abfd) [r_symndx] = tls_type; + } + + if (r_type != R_390_TLS_IE32) + break; + /* Fall through */ + + case R_390_TLS_LE32: + if (!info->shared) + break; + info->flags |= DF_STATIC_TLS; + /* Fall through */ + case R_390_8: case R_390_16: case R_390_32: @@ -1059,6 +1327,7 @@ elf_s390_gc_sweep_hook (abfd, info, sec, relocs) bfd_signed_vma *local_got_refcounts; const Elf_Internal_Rela *rel, *relend; unsigned long r_symndx; + int r_type; struct elf_link_hash_entry *h; elf_section_data (sec)->local_dynrel = NULL; @@ -1077,8 +1346,21 @@ elf_s390_gc_sweep_hook (abfd, info, sec, relocs) else h = sym_hashes[r_symndx - symtab_hdr->sh_info]; - switch (ELF32_R_TYPE (rel->r_info)) + r_type = elf_s390_tls_transition (info, + ELF32_R_TYPE (rel->r_info), + r_symndx >= symtab_hdr->sh_info); + switch (r_type) { + case R_390_TLS_LDM32: + if (elf_s390_hash_table (info)->tls_ldm_got.refcount > 0) + elf_s390_hash_table (info)->tls_ldm_got.refcount -= 1; + break; + + case R_390_TLS_GD32: + case R_390_TLS_IE32: + case R_390_TLS_GOTIE12: + case R_390_TLS_GOTIE32: + case R_390_TLS_IEENT: case R_390_GOT12: case R_390_GOT16: case R_390_GOT32: @@ -1097,38 +1379,14 @@ elf_s390_gc_sweep_hook (abfd, info, sec, relocs) if (local_got_refcounts[r_symndx] > 0) local_got_refcounts[r_symndx] -= 1; } - break; + if (r_type != R_390_TLS_IE32) + break; + /* Fall through */ - case R_390_PLT16DBL: - case R_390_PLT32DBL: - case R_390_PLT32: - case R_390_PLTOFF16: - case R_390_PLTOFF32: - if (h != NULL) - { - if (h->plt.refcount > 0) - h->plt.refcount -= 1; - } - break; - - case R_390_GOTPLT12: - case R_390_GOTPLT16: - case R_390_GOTPLT32: - case R_390_GOTPLTENT: - if (h != NULL) - { - if (h->plt.refcount > 0) - { - ((struct elf_s390_link_hash_entry *) h)->gotplt_refcount--; - h->plt.refcount -= 1; - } - } - else if (local_got_refcounts != NULL) - { - if (local_got_refcounts[r_symndx] > 0) - local_got_refcounts[r_symndx] -= 1; - } - break; + case R_390_TLS_LE32: + if (!info->shared) + break; + /* Fall through */ case R_390_8: case R_390_12: @@ -1165,6 +1423,37 @@ elf_s390_gc_sweep_hook (abfd, info, sec, relocs) } break; + case R_390_PLT16DBL: + case R_390_PLT32DBL: + case R_390_PLT32: + case R_390_PLTOFF16: + case R_390_PLTOFF32: + if (h != NULL) + { + if (h->plt.refcount > 0) + h->plt.refcount -= 1; + } + break; + + case R_390_GOTPLT12: + case R_390_GOTPLT16: + case R_390_GOTPLT32: + case R_390_GOTPLTENT: + if (h != NULL) + { + if (h->plt.refcount > 0) + { + ((struct elf_s390_link_hash_entry *) h)->gotplt_refcount--; + h->plt.refcount -= 1; + } + } + else if (local_got_refcounts != NULL) + { + if (local_got_refcounts[r_symndx] > 0) + local_got_refcounts[r_symndx] -= 1; + } + break; + default: break; } @@ -1437,10 +1726,31 @@ allocate_dynrelocs (h, inf) elf_s390_adjust_gotplt((struct elf_s390_link_hash_entry *) h); } - if (h->got.refcount > 0) + /* If R_390_TLS_{IE32,GOTIE32,GOTIE12,IEENT} symbol is now local to + the binary, we can optimize a bit. IE32 and GOTIE32 get converted + to R_390_TLS_LE32 requiring no TLS entry. For GOTIE12 and IEENT + we can save the dynamic TLS relocation. */ + if (h->got.refcount > 0 + && !info->shared + && h->dynindx == -1 + && elf_s390_hash_entry(h)->tls_type >= GOT_TLS_IE) { + if (elf_s390_hash_entry(h)->tls_type == GOT_TLS_IE_NLT) + /* For the GOTIE access without a literal pool entry the offset has + to be stored somewhere. The immediate value in the instruction + is not bit enough so the value is stored in the got. */ + { + h->got.offset = htab->sgot->_raw_size; + htab->sgot->_raw_size += GOT_ENTRY_SIZE; + } + else + h->got.offset = (bfd_vma) -1; + } + else if (h->got.refcount > 0) + { asection *s; bfd_boolean dyn; + int tls_type = elf_s390_hash_entry(h)->tls_type; /* Make sure this symbol is output as a dynamic symbol. Undefined weak syms won't yet be marked as dynamic. */ @@ -1454,8 +1764,18 @@ allocate_dynrelocs (h, inf) s = htab->sgot; h->got.offset = s->_raw_size; s->_raw_size += GOT_ENTRY_SIZE; + /* R_390_TLS_GD32 needs 2 consecutive GOT slots. */ + if (tls_type == GOT_TLS_GD) + s->_raw_size += GOT_ENTRY_SIZE; dyn = htab->elf.dynamic_sections_created; - if (WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info, h)) + /* R_390_TLS_IE32 needs one dynamic relocation, + R_390_TLS_GD32 needs one if local symbol and two if global. */ + if ((tls_type == GOT_TLS_GD && h->dynindx == -1) + || tls_type >= GOT_TLS_IE) + htab->srelgot->_raw_size += sizeof (Elf32_External_Rela); + else if (tls_type == GOT_TLS_GD) + htab->srelgot->_raw_size += 2 * sizeof (Elf32_External_Rela); + else if (WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info, h)) htab->srelgot->_raw_size += sizeof (Elf32_External_Rela); } else @@ -1601,6 +1921,7 @@ elf_s390_size_dynamic_sections (output_bfd, info) { bfd_signed_vma *local_got; bfd_signed_vma *end_local_got; + char *local_tls_type; bfd_size_type locsymcount; Elf_Internal_Shdr *symtab_hdr; asection *srela; @@ -1642,14 +1963,17 @@ elf_s390_size_dynamic_sections (output_bfd, info) symtab_hdr = &elf_tdata (ibfd)->symtab_hdr; locsymcount = symtab_hdr->sh_info; end_local_got = local_got + locsymcount; + local_tls_type = elf_s390_local_got_tls_type (ibfd); s = htab->sgot; srela = htab->srelgot; - for (; local_got < end_local_got; ++local_got) + for (; local_got < end_local_got; ++local_got, ++local_tls_type) { if (*local_got > 0) { *local_got = s->_raw_size; s->_raw_size += GOT_ENTRY_SIZE; + if (*local_tls_type == GOT_TLS_GD) + s->_raw_size += GOT_ENTRY_SIZE; if (info->shared) srela->_raw_size += sizeof (Elf32_External_Rela); } @@ -1658,6 +1982,17 @@ elf_s390_size_dynamic_sections (output_bfd, info) } } + if (htab->tls_ldm_got.refcount > 0) + { + /* Allocate 2 got entries and 1 dynamic reloc for R_390_TLS_LDM32 + relocs. */ + htab->tls_ldm_got.offset = htab->sgot->_raw_size; + htab->sgot->_raw_size += 2 * GOT_ENTRY_SIZE; + htab->srelgot->_raw_size += sizeof (Elf32_External_Rela); + } + else + htab->tls_ldm_got.offset = -1; + /* Allocate global sym .plt and .got entries, and space for global sym dynamic relocs. */ elf_link_hash_traverse (&htab->elf, allocate_dynrelocs, (PTR) info); @@ -1768,6 +2103,58 @@ elf_s390_size_dynamic_sections (output_bfd, info) return TRUE; } +/* Return the base VMA address which should be subtracted from real addresses + when resolving @dtpoff relocation. + This is PT_TLS segment p_vaddr. */ + +static bfd_vma +dtpoff_base (info) + struct bfd_link_info *info; +{ + /* If tls_segment is NULL, we should have signalled an error already. */ + if (elf_hash_table (info)->tls_segment == NULL) + return 0; + return elf_hash_table (info)->tls_segment->start; +} + +/* Return the relocation value for @tpoff relocation + if STT_TLS virtual address is ADDRESS. */ + +static bfd_vma +tpoff (info, address) + struct bfd_link_info *info; + bfd_vma address; +{ + struct elf_link_tls_segment *tls_segment + = elf_hash_table (info)->tls_segment; + + /* If tls_segment is NULL, we should have signalled an error already. */ + if (tls_segment == NULL) + return 0; + return (align_power (tls_segment->size, tls_segment->align) + + tls_segment->start - address); +} + +/* Complain if TLS instruction relocation is against an invalid + instruction. */ + +static void +invalid_tls_insn (input_bfd, input_section, rel) + bfd *input_bfd; + asection *input_section; + Elf_Internal_Rela *rel; +{ + reloc_howto_type *howto; + + howto = elf_howto_table + ELF32_R_TYPE (rel->r_info); + (*_bfd_error_handler) + (_("%s(%s+0x%lx): invalid instruction for TLS relocation %s"), + bfd_archive_filename (input_bfd), + bfd_get_section_name (input_bfd, input_section), + (long) rel->r_offset, + howto->name); +} + /* Relocate a 390 ELF section. */ static bfd_boolean @@ -1811,6 +2198,7 @@ elf_s390_relocate_section (output_bfd, info, input_bfd, input_section, bfd_vma relocation; bfd_boolean unresolved_reloc; bfd_reloc_status_type r; + int tls_type; r_type = ELF32_R_TYPE (rel->r_info); if (r_type == (int) R_390_GNU_VTINHERIT @@ -2185,6 +2573,330 @@ elf_s390_relocate_section (output_bfd, info, input_bfd, input_section, } break; + /* Relocations for tls literal pool entries. */ + case R_390_TLS_IE32: + if (info->shared) + { + Elf_Internal_Rela outrel; + asection *sreloc; + bfd_byte *loc; + + outrel.r_offset = rel->r_offset + + input_section->output_section->vma + + input_section->output_offset; + outrel.r_info = ELF32_R_INFO (0, R_390_RELATIVE); + sreloc = elf_section_data (input_section)->sreloc; + if (sreloc == NULL) + abort (); + loc = sreloc->contents; + loc += sreloc->reloc_count++ * sizeof (Elf32_External_Rela); + bfd_elf32_swap_reloc_out (output_bfd, &outrel, loc); + } + /* Fall through */ + + case R_390_TLS_GD32: + case R_390_TLS_GOTIE32: + r_type = elf_s390_tls_transition (info, r_type, h == NULL); + tls_type = GOT_UNKNOWN; + if (h == NULL && local_got_offsets) + tls_type = elf_s390_local_got_tls_type (input_bfd) [r_symndx]; + else if (h != NULL) + { + tls_type = elf_s390_hash_entry(h)->tls_type; + if (!info->shared && h->dynindx == -1 && tls_type >= GOT_TLS_IE) + r_type = R_390_TLS_LE32; + } + if (r_type == R_390_TLS_GD32 && tls_type >= GOT_TLS_IE) + r_type = R_390_TLS_IE32; + + if (r_type == R_390_TLS_LE32) + { + /* This relocation gets optimized away by the local exec + access optimization. */ + BFD_ASSERT (! unresolved_reloc); + bfd_put_32 (output_bfd, -tpoff (info, relocation), + contents + rel->r_offset); + continue; + } + + if (htab->sgot == NULL) + abort (); + + if (h != NULL) + off = h->got.offset; + else + { + if (local_got_offsets == NULL) + abort (); + + off = local_got_offsets[r_symndx]; + } + + emit_tls_relocs: + + if ((off & 1) != 0) + off &= ~1; + else + { + Elf_Internal_Rela outrel; + bfd_byte *loc; + int dr_type, indx; + + if (htab->srelgot == NULL) + abort (); + + outrel.r_offset = (htab->sgot->output_section->vma + + htab->sgot->output_offset + off); + + indx = h && h->dynindx != -1 ? h->dynindx : 0; + if (r_type == R_390_TLS_GD32) + dr_type = R_390_TLS_DTPMOD; + else + dr_type = R_390_TLS_TPOFF; + if (dr_type == R_390_TLS_TPOFF && indx == 0) + outrel.r_addend = relocation - dtpoff_base (info); + else + outrel.r_addend = 0; + outrel.r_info = ELF32_R_INFO (indx, dr_type); + loc = htab->srelgot->contents; + loc += htab->srelgot->reloc_count++ + * sizeof (Elf32_External_Rela); + bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc); + + if (r_type == R_390_TLS_GD32) + { + if (indx == 0) + { + BFD_ASSERT (! unresolved_reloc); + bfd_put_32 (output_bfd, + relocation - dtpoff_base (info), + htab->sgot->contents + off + GOT_ENTRY_SIZE); + } + else + { + outrel.r_info = ELF32_R_INFO (indx, R_390_TLS_DTPOFF); + outrel.r_offset += GOT_ENTRY_SIZE; + outrel.r_addend = 0; + htab->srelgot->reloc_count++; + loc += sizeof (Elf32_External_Rela); + bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc); + } + } + + if (h != NULL) + h->got.offset |= 1; + else + local_got_offsets[r_symndx] |= 1; + } + + if (off >= (bfd_vma) -2) + abort (); + if (r_type == ELF32_R_TYPE (rel->r_info)) + { + relocation = htab->sgot->output_offset + off; + if (r_type == R_390_TLS_IE32 || r_type == R_390_TLS_IEENT) + relocation += htab->sgot->output_section->vma; + unresolved_reloc = FALSE; + } + else + { + bfd_put_32 (output_bfd, htab->sgot->output_offset + off, + contents + rel->r_offset); + continue; + } + break; + + case R_390_TLS_GOTIE12: + case R_390_TLS_IEENT: + if (h == NULL) + { + if (local_got_offsets == NULL) + abort(); + off = local_got_offsets[r_symndx]; + if (info->shared) + goto emit_tls_relocs; + } + else + { + off = h->got.offset; + tls_type = elf_s390_hash_entry(h)->tls_type; + if (info->shared || h->dynindx != -1 || tls_type < GOT_TLS_IE) + goto emit_tls_relocs; + } + + if (htab->sgot == NULL) + abort (); + + BFD_ASSERT (! unresolved_reloc); + bfd_put_32 (output_bfd, -tpoff (info, relocation), + htab->sgot->contents + off); + relocation = htab->sgot->output_offset + off; + if (r_type == R_390_TLS_IEENT) + relocation += htab->sgot->output_section->vma; + unresolved_reloc = FALSE; + break; + + case R_390_TLS_LDM32: + if (! info->shared) + /* The literal pool entry this relocation refers to gets ignored + by the optimized code of the local exec model. Do nothing + and the value will turn out zero. */ + continue; + + if (htab->sgot == NULL) + abort (); + + off = htab->tls_ldm_got.offset; + if (off & 1) + off &= ~1; + else + { + Elf_Internal_Rela outrel; + bfd_byte *loc; + + if (htab->srelgot == NULL) + abort (); + + outrel.r_offset = (htab->sgot->output_section->vma + + htab->sgot->output_offset + off); + + bfd_put_32 (output_bfd, 0, + htab->sgot->contents + off + GOT_ENTRY_SIZE); + outrel.r_info = ELF32_R_INFO (0, R_390_TLS_DTPMOD); + outrel.r_addend = 0; + loc = htab->srelgot->contents; + loc += htab->srelgot->reloc_count++ + * sizeof (Elf32_External_Rela); + bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc); + htab->tls_ldm_got.offset |= 1; + } + relocation = htab->sgot->output_offset + off; + unresolved_reloc = FALSE; + break; + + case R_390_TLS_LE32: + if (info->shared) + { + /* Linking a shared library with non-fpic code requires + a R_390_TLS_TPOFF relocation. */ + Elf_Internal_Rela outrel; + asection *sreloc; + bfd_byte *loc; + int indx; + + outrel.r_offset = rel->r_offset + + input_section->output_section->vma + + input_section->output_offset; + if (h != NULL && h->dynindx != -1) + indx = h->dynindx; + else + indx = 0; + outrel.r_info = ELF32_R_INFO (indx, R_390_TLS_TPOFF); + if (indx == 0) + outrel.r_addend = relocation - dtpoff_base (info); + else + outrel.r_addend = 0; + sreloc = elf_section_data (input_section)->sreloc; + if (sreloc == NULL) + abort (); + loc = sreloc->contents; + loc += sreloc->reloc_count++ * sizeof (Elf32_External_Rela); + bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc); + } + else + { + BFD_ASSERT (! unresolved_reloc); + bfd_put_32 (output_bfd, -tpoff (info, relocation), + contents + rel->r_offset); + } + continue; + + case R_390_TLS_LDO32: + if (info->shared || (input_section->flags & SEC_CODE) == 0) + relocation -= dtpoff_base (info); + else + /* When converting LDO to LE, we must negate. */ + relocation = -tpoff (info, relocation); + break; + + /* Relocations for tls instructions. */ + case R_390_TLS_LOAD: + case R_390_TLS_GDCALL: + case R_390_TLS_LDCALL: + tls_type = GOT_UNKNOWN; + if (h == NULL && local_got_offsets) + tls_type = elf_s390_local_got_tls_type (input_bfd) [r_symndx]; + else if (h != NULL) + tls_type = elf_s390_hash_entry(h)->tls_type; + + if (tls_type == GOT_TLS_GD) + continue; + + if (r_type == R_390_TLS_LOAD) + { + if (!info->shared && (h == NULL || h->dynindx == -1)) + { + /* IE->LE transition. Four valid cases: + l %rx,0(0,%ry) -> lr %rx,%ry + bcr 0,0 + l %rx,0(%ry,0) -> lr %rx,%ry + bcr 0,0 + l %rx,0(%ry,%r12) -> lr %rx,%ry + bcr 0,0 + l %rx,0(%r12,%ry) -> lr %rx,%ry + bcr 0,0 */ + unsigned int insn, ry; + + insn = bfd_get_32 (input_bfd, contents + rel->r_offset); + ry = 0; + if ((insn & 0xff00f000) == 0x58000000) + /* l %rx,0(%ry,0) -> lr %rx,%ry + bcr 0,0 */ + ry = (insn & 0x000f0000); + else if ((insn & 0xff0f0000) == 0x58000000) + /* l %rx,0(0,%ry) -> lr %rx,%ry + bcr 0,0 */ + ry = (insn & 0x0000f000) << 4; + else if ((insn & 0xff00f000) == 0x5800c000) + /* l %rx,0(%ry,%r12) -> lr %rx,%ry + bcr 0,0 */ + ry = (insn & 0x000f0000); + else if ((insn & 0xff0f0000) == 0x580c0000) + /* l %rx,0(%r12,%ry) -> lr %rx,%ry + bcr 0,0 */ + ry = (insn & 0x0000f000) << 4; + else + invalid_tls_insn (input_bfd, input_section, rel); + insn = 0x18000700 | (insn & 0x00f00000) | ry; + bfd_put_32 (output_bfd, insn, contents + rel->r_offset); + } + } + else if (r_type == R_390_TLS_GDCALL) + { + unsigned int insn; + + insn = bfd_get_32 (input_bfd, contents + rel->r_offset); + if ((insn & 0xff000fff) != 0x4d000000) + invalid_tls_insn (input_bfd, input_section, rel); + if (!info->shared && (h == NULL || h->dynindx == -1)) + /* GD->LE transition. + bas %r14,0(%rx,%r13) -> bc 0,0 */ + insn = 0x47000000; + else + /* GD->IE transition. + bas %r14,0(%rx,%r13) -> l %r2,0(%r2,%r12) */ + insn = 0x5822c000; + bfd_put_32 (output_bfd, insn, contents + rel->r_offset); + } + else if (r_type == R_390_TLS_LDCALL) + { + if (!info->shared) + { + unsigned int insn; + + insn = bfd_get_32 (input_bfd, contents + rel->r_offset); + if ((insn & 0xff000fff) != 0x4d000000) + invalid_tls_insn (input_bfd, input_section, rel); + /* LD->LE transition. + bas %r14,0(%rx,%r13) -> bc 0,0 */ + insn = 0x47000000; + bfd_put_32 (output_bfd, insn, contents + rel->r_offset); + } + } + continue; + default: break; } @@ -2399,7 +3111,10 @@ elf_s390_finish_dynamic_symbol (output_bfd, info, h, sym) } } - if (h->got.offset != (bfd_vma) -1) + if (h->got.offset != (bfd_vma) -1 + && elf_s390_hash_entry(h)->tls_type != GOT_TLS_GD + && elf_s390_hash_entry(h)->tls_type != GOT_TLS_IE + && elf_s390_hash_entry(h)->tls_type != GOT_TLS_IE_NLT) { Elf_Internal_Rela rela; bfd_byte *loc; @@ -2616,13 +3331,6 @@ elf_s390_finish_dynamic_sections (output_bfd, info) } static bfd_boolean -elf_s390_object_p (abfd) - bfd *abfd; -{ - return bfd_default_set_arch_mach (abfd, bfd_arch_s390, bfd_mach_s390_31); -} - -static bfd_boolean elf_s390_grok_prstatus (abfd, note) bfd * abfd; Elf_Internal_Note * note; @@ -2689,6 +3397,7 @@ elf_s390_grok_prstatus (abfd, note) #define elf_backend_reloc_type_class elf_s390_reloc_type_class #define elf_backend_grok_prstatus elf_s390_grok_prstatus +#define bfd_elf32_mkobject elf_s390_mkobject #define elf_backend_object_p elf_s390_object_p #include "elf32-target.h" diff --git a/bfd/elf64-s390.c b/bfd/elf64-s390.c index 4029fbc..1c81edf 100644 --- a/bfd/elf64-s390.c +++ b/bfd/elf64-s390.c @@ -72,8 +72,20 @@ static enum elf_reloc_type_class elf_s390_reloc_type_class PARAMS ((const Elf_Internal_Rela *)); static bfd_boolean elf_s390_finish_dynamic_sections PARAMS ((bfd *, struct bfd_link_info *)); +static bfd_boolean elf_s390_mkobject + PARAMS ((bfd *)); static bfd_boolean elf_s390_object_p PARAMS ((bfd *)); +static int elf_s390_tls_transition + PARAMS ((struct bfd_link_info *, int, int)); +static bfd_reloc_status_type s390_tls_reloc + PARAMS ((bfd *, arelent *, asymbol *, PTR, asection *, bfd *, char **)); +static bfd_vma dtpoff_base + PARAMS ((struct bfd_link_info *)); +static bfd_vma tpoff + PARAMS ((struct bfd_link_info *, bfd_vma)); +static void invalid_tls_insn + PARAMS ((bfd *, asection *, Elf_Internal_Rela *)); #include "elf/s390.h" @@ -170,6 +182,40 @@ static reloc_howto_type elf_howto_table[] = bfd_elf_generic_reloc, "R_390_PLTOFF32", FALSE, 0,0xffffffff, FALSE), HOWTO(R_390_PLTOFF64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield, bfd_elf_generic_reloc, "R_390_PLTOFF64", FALSE, 0,MINUS_ONE, FALSE), + HOWTO(R_390_TLS_LOAD, 0, 0, 0, FALSE, 0, complain_overflow_dont, + s390_tls_reloc, "R_390_TLS_LOAD", FALSE, 0, 0, FALSE), + HOWTO(R_390_TLS_GDCALL, 0, 0, 0, FALSE, 0, complain_overflow_dont, + s390_tls_reloc, "R_390_TLS_GDCALL", FALSE, 0, 0, FALSE), + HOWTO(R_390_TLS_LDCALL, 0, 0, 0, FALSE, 0, complain_overflow_dont, + s390_tls_reloc, "R_390_TLS_LDCALL", FALSE, 0, 0, FALSE), + EMPTY_HOWTO (R_390_TLS_GD32), /* Empty entry for R_390_TLS_GD32. */ + HOWTO(R_390_TLS_GD64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield, + bfd_elf_generic_reloc, "R_390_TLS_GD64", FALSE, 0, MINUS_ONE, FALSE), + HOWTO(R_390_TLS_GOTIE12, 0, 1, 12, FALSE, 0, complain_overflow_dont, + bfd_elf_generic_reloc, "R_390_TLS_GOTIE12", FALSE, 0, 0x00000fff, FALSE), + EMPTY_HOWTO (R_390_TLS_GOTIE32), /* Empty entry for R_390_TLS_GOTIE32. */ + HOWTO(R_390_TLS_GOTIE64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield, + bfd_elf_generic_reloc, "R_390_TLS_GOTIE64", FALSE, 0, MINUS_ONE, FALSE), + EMPTY_HOWTO (R_390_TLS_LDM32), /* Empty entry for R_390_TLS_LDM32. */ + HOWTO(R_390_TLS_LDM64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield, + bfd_elf_generic_reloc, "R_390_TLS_LDM64", FALSE, 0, MINUS_ONE, FALSE), + EMPTY_HOWTO (R_390_TLS_IE32), /* Empty entry for R_390_TLS_IE32. */ + HOWTO(R_390_TLS_IE64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield, + bfd_elf_generic_reloc, "R_390_TLS_IE64", FALSE, 0, MINUS_ONE, FALSE), + HOWTO(R_390_TLS_IEENT, 1, 2, 32, TRUE, 0, complain_overflow_bitfield, + bfd_elf_generic_reloc, "R_390_TLS_IEENT", FALSE, 0, MINUS_ONE, TRUE), + EMPTY_HOWTO (R_390_TLS_LE32), /* Empty entry for R_390_TLS_LE32. */ + HOWTO(R_390_TLS_LE64, 0, 2, 32, FALSE, 0, complain_overflow_bitfield, + bfd_elf_generic_reloc, "R_390_TLS_LE64", FALSE, 0, MINUS_ONE, FALSE), + EMPTY_HOWTO (R_390_TLS_LDO32), /* Empty entry for R_390_TLS_LDO32. */ + HOWTO(R_390_TLS_LDO64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield, + bfd_elf_generic_reloc, "R_390_TLS_LDO64", FALSE, 0, MINUS_ONE, FALSE), + HOWTO(R_390_TLS_DTPMOD, 0, 4, 64, FALSE, 0, complain_overflow_bitfield, + bfd_elf_generic_reloc, "R_390_TLS_DTPMOD", FALSE, 0, MINUS_ONE, FALSE), + HOWTO(R_390_TLS_DTPOFF, 0, 4, 64, FALSE, 0, complain_overflow_bitfield, + bfd_elf_generic_reloc, "R_390_TLS_DTPOFF", FALSE, 0, MINUS_ONE, FALSE), + HOWTO(R_390_TLS_TPOFF, 0, 4, 64, FALSE, 0, complain_overflow_bitfield, + bfd_elf_generic_reloc, "R_390_TLS_TPOFF", FALSE, 0, MINUS_ONE, FALSE), }; /* GNU extension to record C++ vtable hierarchy. */ @@ -261,6 +307,34 @@ elf_s390_reloc_type_lookup (abfd, code) return &elf_howto_table[(int) R_390_PLTOFF32]; case BFD_RELOC_390_PLTOFF64: return &elf_howto_table[(int) R_390_PLTOFF64]; + case BFD_RELOC_390_TLS_LOAD: + return &elf_howto_table[(int) R_390_TLS_LOAD]; + case BFD_RELOC_390_TLS_GDCALL: + return &elf_howto_table[(int) R_390_TLS_GDCALL]; + case BFD_RELOC_390_TLS_LDCALL: + return &elf_howto_table[(int) R_390_TLS_LDCALL]; + case BFD_RELOC_390_TLS_GD64: + return &elf_howto_table[(int) R_390_TLS_GD64]; + case BFD_RELOC_390_TLS_GOTIE12: + return &elf_howto_table[(int) R_390_TLS_GOTIE12]; + case BFD_RELOC_390_TLS_GOTIE64: + return &elf_howto_table[(int) R_390_TLS_GOTIE64]; + case BFD_RELOC_390_TLS_LDM64: + return &elf_howto_table[(int) R_390_TLS_LDM64]; + case BFD_RELOC_390_TLS_IE64: + return &elf_howto_table[(int) R_390_TLS_IE64]; + case BFD_RELOC_390_TLS_IEENT: + return &elf_howto_table[(int) R_390_TLS_IEENT]; + case BFD_RELOC_390_TLS_LE64: + return &elf_howto_table[(int) R_390_TLS_LE64]; + case BFD_RELOC_390_TLS_LDO64: + return &elf_howto_table[(int) R_390_TLS_LDO64]; + case BFD_RELOC_390_TLS_DTPMOD: + return &elf_howto_table[(int) R_390_TLS_DTPMOD]; + case BFD_RELOC_390_TLS_DTPOFF: + return &elf_howto_table[(int) R_390_TLS_DTPOFF]; + case BFD_RELOC_390_TLS_TPOFF: + return &elf_howto_table[(int) R_390_TLS_TPOFF]; case BFD_RELOC_VTABLE_INHERIT: return &elf64_s390_vtinherit_howto; case BFD_RELOC_VTABLE_ENTRY: @@ -296,6 +370,23 @@ elf_s390_info_to_howto (abfd, cache_ptr, dst) } } +/* A relocation function which doesn't do anything. */ +static bfd_reloc_status_type +s390_tls_reloc (abfd, reloc_entry, symbol, data, input_section, + output_bfd, error_message) + bfd *abfd ATTRIBUTE_UNUSED; + arelent *reloc_entry; + asymbol *symbol ATTRIBUTE_UNUSED; + PTR data ATTRIBUTE_UNUSED; + asection *input_section; + bfd *output_bfd; + char **error_message ATTRIBUTE_UNUSED; +{ + if (output_bfd) + reloc_entry->address += input_section->output_offset; + return bfd_reloc_ok; +} + static bfd_boolean elf_s390_is_local_label_name (abfd, name) bfd *abfd; @@ -430,8 +521,59 @@ struct elf_s390_link_hash_entry /* Number of GOTPLT references for a function. */ bfd_signed_vma gotplt_refcount; + +#define GOT_UNKNOWN 0 +#define GOT_NORMAL 1 +#define GOT_TLS_GD 2 +#define GOT_TLS_IE 3 +#define GOT_TLS_IE_NLT 3 + unsigned char tls_type; }; +#define elf_s390_hash_entry(ent) \ + ((struct elf_s390_link_hash_entry *)(ent)) + +struct elf_s390_obj_tdata +{ + struct elf_obj_tdata root; + + /* tls_type for each local got entry. */ + char *local_got_tls_type; +}; + +#define elf_s390_tdata(abfd) \ + ((struct elf_s390_obj_tdata *) (abfd)->tdata.any) + +#define elf_s390_local_got_tls_type(abfd) \ + (elf_s390_tdata (abfd)->local_got_tls_type) + +static bfd_boolean +elf_s390_mkobject (abfd) + bfd *abfd; +{ + bfd_size_type amt = sizeof (struct elf_s390_obj_tdata); + abfd->tdata.any = bfd_zalloc (abfd, amt); + if (abfd->tdata.any == NULL) + return FALSE; + return TRUE; +} + +static bfd_boolean +elf_s390_object_p (abfd) + bfd *abfd; +{ + /* Allocate our special target data. */ + struct elf_s390_obj_tdata *new_tdata; + bfd_size_type amt = sizeof (struct elf_s390_obj_tdata); + new_tdata = bfd_zalloc (abfd, amt); + if (new_tdata == NULL) + return FALSE; + new_tdata->root = *abfd->tdata.elf_obj_data; + abfd->tdata.any = new_tdata; + /* Set the right machine number for an s390 elf32 file. */ + return bfd_default_set_arch_mach (abfd, bfd_arch_s390, bfd_mach_s390_64); +} + /* s390 ELF linker hash table. */ struct elf_s390_link_hash_table @@ -447,6 +589,11 @@ struct elf_s390_link_hash_table asection *sdynbss; asection *srelbss; + union { + bfd_signed_vma refcount; + bfd_vma offset; + } tls_ldm_got; + /* Small local sym to section mapping cache. */ struct sym_sec_cache sym_sec; }; @@ -483,6 +630,7 @@ link_hash_newfunc (entry, table, string) eh = (struct elf_s390_link_hash_entry *) entry; eh->dyn_relocs = NULL; eh->gotplt_refcount = 0; + eh->tls_type = GOT_UNKNOWN; } return entry; @@ -514,6 +662,7 @@ elf_s390_link_hash_table_create (abfd) ret->srelplt = NULL; ret->sdynbss = NULL; ret->srelbss = NULL; + ret->tls_ldm_got.refcount = 0; ret->sym_sec.abfd = NULL; return &ret->elf.root; @@ -626,9 +775,43 @@ elf_s390_copy_indirect_symbol (bed, dir, ind) eind->dyn_relocs = NULL; } + if (ind->root.type == bfd_link_hash_indirect + && dir->got.refcount <= 0) + { + edir->tls_type = eind->tls_type; + eind->tls_type = GOT_UNKNOWN; + } + _bfd_elf_link_hash_copy_indirect (bed, dir, ind); } +static int +elf_s390_tls_transition (info, r_type, is_local) + struct bfd_link_info *info; + int r_type; + int is_local; +{ + if (info->shared) + return r_type; + + switch (r_type) + { + case R_390_TLS_GD64: + case R_390_TLS_IE64: + if (is_local) + return R_390_TLS_LE64; + return R_390_TLS_IE64; + case R_390_TLS_GOTIE64: + if (is_local) + return R_390_TLS_LE64; + return R_390_TLS_GOTIE64; + case R_390_TLS_LDM64: + return R_390_TLS_LE64; + } + + return r_type; +} + /* Look through the relocs for a section during the first phase, and allocate space in the global offset table or procedure linkage table. */ @@ -647,6 +830,7 @@ elf_s390_check_relocs (abfd, info, sec, relocs) const Elf_Internal_Rela *rel_end; asection *sreloc; bfd_signed_vma *local_got_refcounts; + int tls_type, old_tls_type; if (info->relocateable) return TRUE; @@ -661,6 +845,7 @@ elf_s390_check_relocs (abfd, info, sec, relocs) rel_end = relocs + sec->reloc_count; for (rel = relocs; rel < rel_end; rel++) { + unsigned int r_type; unsigned long r_symndx; struct elf_link_hash_entry *h; @@ -681,7 +866,10 @@ elf_s390_check_relocs (abfd, info, sec, relocs) /* Create got section and local_got_refcounts array if they are needed. */ - switch (ELF64_R_TYPE (rel->r_info)) + r_type = elf_s390_tls_transition (info, + ELF64_R_TYPE (rel->r_info), + h == NULL); + switch (r_type) { case R_390_GOT12: case R_390_GOT16: @@ -693,18 +881,26 @@ elf_s390_check_relocs (abfd, info, sec, relocs) case R_390_GOTPLT32: case R_390_GOTPLT64: case R_390_GOTPLTENT: + case R_390_TLS_GD64: + case R_390_TLS_GOTIE12: + case R_390_TLS_GOTIE64: + case R_390_TLS_IEENT: + case R_390_TLS_IE64: + case R_390_TLS_LDM64: if (h == NULL && local_got_refcounts == NULL) { bfd_size_type size; size = symtab_hdr->sh_info; - size *= sizeof (bfd_signed_vma); + size *= (sizeof (bfd_signed_vma) + sizeof(char)); local_got_refcounts = ((bfd_signed_vma *) bfd_zalloc (abfd, size)); if (local_got_refcounts == NULL) return FALSE; elf_local_got_refcounts (abfd) = local_got_refcounts; + elf_s390_local_got_tls_type (abfd) + = (char *) (local_got_refcounts + symtab_hdr->sh_info); } /* Fall through. */ case R_390_GOTOFF16: @@ -721,24 +917,8 @@ elf_s390_check_relocs (abfd, info, sec, relocs) } } - switch (ELF64_R_TYPE (rel->r_info)) + switch (r_type) { - case R_390_GOT12: - case R_390_GOT16: - case R_390_GOT32: - case R_390_GOT64: - case R_390_GOTENT: - /* This symbol requires a global offset table entry. */ - if (h != NULL) - { - h->got.refcount += 1; - } - else - { - local_got_refcounts[r_symndx] += 1; - } - /* Fall through */ - case R_390_GOTOFF16: case R_390_GOTOFF32: case R_390_GOTOFF64: @@ -790,10 +970,92 @@ elf_s390_check_relocs (abfd, info, sec, relocs) h->plt.refcount += 1; } else + local_got_refcounts[r_symndx] += 1; + break; + + case R_390_TLS_LDM64: + htab->tls_ldm_got.refcount += 1; + break; + + case R_390_TLS_IE64: + case R_390_TLS_GOTIE12: + case R_390_TLS_GOTIE64: + case R_390_TLS_IEENT: + if (info->shared) + info->flags |= DF_STATIC_TLS; + /* Fall through */ + + case R_390_GOT12: + case R_390_GOT16: + case R_390_GOT32: + case R_390_GOT64: + case R_390_GOTENT: + case R_390_TLS_GD64: + /* This symbol requires a global offset table entry. */ + switch (r_type) + { + default: + case R_390_GOT12: + case R_390_GOT16: + case R_390_GOT32: + case R_390_GOTENT: + tls_type = GOT_NORMAL; + break; + case R_390_TLS_GD64: + tls_type = GOT_TLS_GD; + break; + case R_390_TLS_IE64: + case R_390_TLS_GOTIE64: + tls_type = GOT_TLS_IE; + break; + case R_390_TLS_GOTIE12: + case R_390_TLS_IEENT: + tls_type = GOT_TLS_IE_NLT; + break; + } + + if (h != NULL) + { + h->got.refcount += 1; + old_tls_type = elf_s390_hash_entry(h)->tls_type; + } + else { local_got_refcounts[r_symndx] += 1; + old_tls_type = elf_s390_local_got_tls_type (abfd) [r_symndx]; } - break; + /* If a TLS symbol is accessed using IE at least once, + there is no point to use dynamic model for it. */ + if (old_tls_type != tls_type && old_tls_type != GOT_UNKNOWN) + { + if (old_tls_type == GOT_NORMAL || tls_type == GOT_NORMAL) + { + (*_bfd_error_handler) + (_("%s: `%s' accessed both as normal and thread local symbol"), + bfd_archive_filename (abfd), h->root.root.string); + return FALSE; + } + if (old_tls_type > tls_type) + tls_type = old_tls_type; + } + + if (old_tls_type != tls_type) + { + if (h != NULL) + elf_s390_hash_entry (h)->tls_type = tls_type; + else + elf_s390_local_got_tls_type (abfd) [r_symndx] = tls_type; + } + + if (r_type != R_390_TLS_IE64) + break; + /* Fall through */ + + case R_390_TLS_LE64: + if (!info->shared) + break; + info->flags |= DF_STATIC_TLS; + /* Fall through */ case R_390_8: case R_390_16: @@ -1031,6 +1293,7 @@ elf_s390_gc_sweep_hook (abfd, info, sec, relocs) bfd_signed_vma *local_got_refcounts; const Elf_Internal_Rela *rel, *relend; unsigned long r_symndx; + int r_type; struct elf_link_hash_entry *h; elf_section_data (sec)->local_dynrel = NULL; @@ -1049,8 +1312,21 @@ elf_s390_gc_sweep_hook (abfd, info, sec, relocs) else h = sym_hashes[r_symndx - symtab_hdr->sh_info]; - switch (ELF64_R_TYPE (rel->r_info)) + r_type = elf_s390_tls_transition (info, + ELF64_R_TYPE (rel->r_info), + r_symndx >= symtab_hdr->sh_info); + switch (r_type) { + case R_390_TLS_LDM64: + if (elf_s390_hash_table (info)->tls_ldm_got.refcount > 0) + elf_s390_hash_table (info)->tls_ldm_got.refcount -= 1; + break; + + case R_390_TLS_GD64: + case R_390_TLS_IE64: + case R_390_TLS_GOTIE12: + case R_390_TLS_GOTIE64: + case R_390_TLS_IEENT: case R_390_GOT12: case R_390_GOT16: case R_390_GOT32: @@ -1071,41 +1347,14 @@ elf_s390_gc_sweep_hook (abfd, info, sec, relocs) if (local_got_refcounts[r_symndx] > 0) local_got_refcounts[r_symndx] -= 1; } - break; + if (r_type != R_390_TLS_IE64) + break; + /* Fall through */ - case R_390_PLT16DBL: - case R_390_PLT32: - case R_390_PLT32DBL: - case R_390_PLT64: - case R_390_PLTOFF16: - case R_390_PLTOFF32: - case R_390_PLTOFF64: - if (h != NULL) - { - if (h->plt.refcount > 0) - h->plt.refcount -= 1; - } - break; - - case R_390_GOTPLT12: - case R_390_GOTPLT16: - case R_390_GOTPLT32: - case R_390_GOTPLT64: - case R_390_GOTPLTENT: - if (h != NULL) - { - if (h->plt.refcount > 0) - { - ((struct elf_s390_link_hash_entry *) h)->gotplt_refcount--; - h->plt.refcount -= 1; - } - } - else if (local_got_refcounts != NULL) - { - if (local_got_refcounts[r_symndx] > 0) - local_got_refcounts[r_symndx] -= 1; - } - break; + case R_390_TLS_LE64: + if (!info->shared) + break; + /* Fall through */ case R_390_8: case R_390_12: @@ -1145,6 +1394,40 @@ elf_s390_gc_sweep_hook (abfd, info, sec, relocs) } break; + case R_390_PLT16DBL: + case R_390_PLT32: + case R_390_PLT32DBL: + case R_390_PLT64: + case R_390_PLTOFF16: + case R_390_PLTOFF32: + case R_390_PLTOFF64: + if (h != NULL) + { + if (h->plt.refcount > 0) + h->plt.refcount -= 1; + } + break; + + case R_390_GOTPLT12: + case R_390_GOTPLT16: + case R_390_GOTPLT32: + case R_390_GOTPLT64: + case R_390_GOTPLTENT: + if (h != NULL) + { + if (h->plt.refcount > 0) + { + ((struct elf_s390_link_hash_entry *) h)->gotplt_refcount--; + h->plt.refcount -= 1; + } + } + else if (local_got_refcounts != NULL) + { + if (local_got_refcounts[r_symndx] > 0) + local_got_refcounts[r_symndx] -= 1; + } + break; + default: break; } @@ -1417,10 +1700,31 @@ allocate_dynrelocs (h, inf) elf_s390_adjust_gotplt((struct elf_s390_link_hash_entry *) h); } - if (h->got.refcount > 0) + /* If R_390_TLS_{IE64,GOTIE64,GOTIE12,IEENT} symbol is now local to + the binary, we can optimize a bit. IE64 and GOTIE64 get converted + to R_390_TLS_LE64 requiring no TLS entry. For GOTIE12 and IEENT + we can save the dynamic TLS relocation. */ + if (h->got.refcount > 0 + && !info->shared + && h->dynindx == -1 + && elf_s390_hash_entry(h)->tls_type >= GOT_TLS_IE) + { + if (elf_s390_hash_entry(h)->tls_type == GOT_TLS_IE_NLT) + /* For the GOTIE access without a literal pool entry the offset has + to be stored somewhere. The immediate value in the instruction + is not bit enough so the value is stored in the got. */ + { + h->got.offset = htab->sgot->_raw_size; + htab->sgot->_raw_size += GOT_ENTRY_SIZE; + } + else + h->got.offset = (bfd_vma) -1; + } + else if (h->got.refcount > 0) { asection *s; bfd_boolean dyn; + int tls_type = elf_s390_hash_entry(h)->tls_type; /* Make sure this symbol is output as a dynamic symbol. Undefined weak syms won't yet be marked as dynamic. */ @@ -1434,8 +1738,18 @@ allocate_dynrelocs (h, inf) s = htab->sgot; h->got.offset = s->_raw_size; s->_raw_size += GOT_ENTRY_SIZE; + /* R_390_TLS_GD64 needs 2 consecutive GOT slots. */ + if (tls_type == GOT_TLS_GD) + s->_raw_size += GOT_ENTRY_SIZE; dyn = htab->elf.dynamic_sections_created; - if (WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info, h)) + /* R_390_TLS_IE64 needs one dynamic relocation, + R_390_TLS_GD64 needs one if local symbol and two if global. */ + if ((tls_type == GOT_TLS_GD && h->dynindx == -1) + || tls_type >= GOT_TLS_IE) + htab->srelgot->_raw_size += sizeof (Elf64_External_Rela); + else if (tls_type == GOT_TLS_GD) + htab->srelgot->_raw_size += 2 * sizeof (Elf64_External_Rela); + else if (WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info, h)) htab->srelgot->_raw_size += sizeof (Elf64_External_Rela); } else @@ -1581,6 +1895,7 @@ elf_s390_size_dynamic_sections (output_bfd, info) { bfd_signed_vma *local_got; bfd_signed_vma *end_local_got; + char *local_tls_type; bfd_size_type locsymcount; Elf_Internal_Shdr *symtab_hdr; asection *srela; @@ -1622,14 +1937,17 @@ elf_s390_size_dynamic_sections (output_bfd, info) symtab_hdr = &elf_tdata (ibfd)->symtab_hdr; locsymcount = symtab_hdr->sh_info; end_local_got = local_got + locsymcount; + local_tls_type = elf_s390_local_got_tls_type (ibfd); s = htab->sgot; srela = htab->srelgot; - for (; local_got < end_local_got; ++local_got) + for (; local_got < end_local_got; ++local_got, ++local_tls_type) { if (*local_got > 0) { *local_got = s->_raw_size; s->_raw_size += GOT_ENTRY_SIZE; + if (*local_tls_type == GOT_TLS_GD) + s->_raw_size += GOT_ENTRY_SIZE; if (info->shared) srela->_raw_size += sizeof (Elf64_External_Rela); } @@ -1638,6 +1956,17 @@ elf_s390_size_dynamic_sections (output_bfd, info) } } + if (htab->tls_ldm_got.refcount > 0) + { + /* Allocate 2 got entries and 1 dynamic reloc for R_390_TLS_LDM64 + relocs. */ + htab->tls_ldm_got.offset = htab->sgot->_raw_size; + htab->sgot->_raw_size += 2 * GOT_ENTRY_SIZE; + htab->srelgot->_raw_size += sizeof (Elf64_External_Rela); + } + else + htab->tls_ldm_got.offset = -1; + /* Allocate global sym .plt and .got entries, and space for global sym dynamic relocs. */ elf_link_hash_traverse (&htab->elf, allocate_dynrelocs, (PTR) info); @@ -1748,6 +2077,58 @@ elf_s390_size_dynamic_sections (output_bfd, info) return TRUE; } +/* Return the base VMA address which should be subtracted from real addresses + when resolving @dtpoff relocation. + This is PT_TLS segment p_vaddr. */ + +static bfd_vma +dtpoff_base (info) + struct bfd_link_info *info; +{ + /* If tls_segment is NULL, we should have signalled an error already. */ + if (elf_hash_table (info)->tls_segment == NULL) + return 0; + return elf_hash_table (info)->tls_segment->start; +} + +/* Return the relocation value for @tpoff relocation + if STT_TLS virtual address is ADDRESS. */ + +static bfd_vma +tpoff (info, address) + struct bfd_link_info *info; + bfd_vma address; +{ + struct elf_link_tls_segment *tls_segment + = elf_hash_table (info)->tls_segment; + + /* If tls_segment is NULL, we should have signalled an error already. */ + if (tls_segment == NULL) + return 0; + return (align_power (tls_segment->size, tls_segment->align) + + tls_segment->start - address); +} + +/* Complain if TLS instruction relocation is against an invalid + instruction. */ + +static void +invalid_tls_insn (input_bfd, input_section, rel) + bfd *input_bfd; + asection *input_section; + Elf_Internal_Rela *rel; +{ + reloc_howto_type *howto; + + howto = elf_howto_table + ELF64_R_TYPE (rel->r_info); + (*_bfd_error_handler) + (_("%s(%s+0x%lx): invalid instruction for TLS relocation %s"), + bfd_archive_filename (input_bfd), + bfd_get_section_name (input_bfd, input_section), + (long) rel->r_offset, + howto->name); +} + /* Relocate a 390 ELF section. */ static bfd_boolean @@ -1791,6 +2172,7 @@ elf_s390_relocate_section (output_bfd, info, input_bfd, input_section, bfd_vma relocation; bfd_boolean unresolved_reloc; bfd_reloc_status_type r; + int tls_type; r_type = ELF64_R_TYPE (rel->r_info); if (r_type == (int) R_390_GNU_VTINHERIT @@ -2176,6 +2558,346 @@ elf_s390_relocate_section (output_bfd, info, input_bfd, input_section, break; + /* Relocations for tls literal pool entries. */ + case R_390_TLS_IE64: + if (info->shared) + { + Elf_Internal_Rela outrel; + asection *sreloc; + bfd_byte *loc; + + outrel.r_offset = rel->r_offset + + input_section->output_section->vma + + input_section->output_offset; + outrel.r_info = ELF64_R_INFO (0, R_390_RELATIVE); + sreloc = elf_section_data (input_section)->sreloc; + if (sreloc == NULL) + abort (); + loc = sreloc->contents; + loc += sreloc->reloc_count++ * sizeof (Elf64_External_Rela); + bfd_elf64_swap_reloc_out (output_bfd, &outrel, loc); + } + /* Fall through */ + + case R_390_TLS_GD64: + case R_390_TLS_GOTIE64: + r_type = elf_s390_tls_transition (info, r_type, h == NULL); + tls_type = GOT_UNKNOWN; + if (h == NULL && local_got_offsets) + tls_type = elf_s390_local_got_tls_type (input_bfd) [r_symndx]; + else if (h != NULL) + { + tls_type = elf_s390_hash_entry(h)->tls_type; + if (!info->shared && h->dynindx == -1 && tls_type >= GOT_TLS_IE) + r_type = R_390_TLS_LE64; + } + if (r_type == R_390_TLS_GD64 && tls_type >= GOT_TLS_IE) + r_type = R_390_TLS_IE64; + + if (r_type == R_390_TLS_LE64) + { + /* This relocation gets optimized away by the local exec + access optimization. */ + BFD_ASSERT (! unresolved_reloc); + bfd_put_64 (output_bfd, -tpoff (info, relocation), + contents + rel->r_offset); + continue; + } + + if (htab->sgot == NULL) + abort (); + + if (h != NULL) + off = h->got.offset; + else + { + if (local_got_offsets == NULL) + abort (); + + off = local_got_offsets[r_symndx]; + } + + emit_tls_relocs: + + if ((off & 1) != 0) + off &= ~1; + else + { + Elf_Internal_Rela outrel; + bfd_byte *loc; + int dr_type, indx; + + if (htab->srelgot == NULL) + abort (); + + outrel.r_offset = (htab->sgot->output_section->vma + + htab->sgot->output_offset + off); + + indx = h && h->dynindx != -1 ? h->dynindx : 0; + if (r_type == R_390_TLS_GD64) + dr_type = R_390_TLS_DTPMOD; + else + dr_type = R_390_TLS_TPOFF; + if (dr_type == R_390_TLS_TPOFF && indx == 0) + outrel.r_addend = relocation - dtpoff_base (info); + else + outrel.r_addend = 0; + outrel.r_info = ELF64_R_INFO (indx, dr_type); + loc = htab->srelgot->contents; + loc += htab->srelgot->reloc_count++ + * sizeof (Elf64_External_Rela); + bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc); + + if (r_type == R_390_TLS_GD64) + { + if (indx == 0) + { + BFD_ASSERT (! unresolved_reloc); + bfd_put_64 (output_bfd, + relocation - dtpoff_base (info), + htab->sgot->contents + off + GOT_ENTRY_SIZE); + } + else + { + outrel.r_info = ELF64_R_INFO (indx, R_390_TLS_DTPOFF); + outrel.r_offset += GOT_ENTRY_SIZE; + outrel.r_addend = 0; + htab->srelgot->reloc_count++; + loc += sizeof (Elf64_External_Rela); + bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc); + } + } + + if (h != NULL) + h->got.offset |= 1; + else + local_got_offsets[r_symndx] |= 1; + } + + if (off >= (bfd_vma) -2) + abort (); + if (r_type == ELF64_R_TYPE (rel->r_info)) + { + relocation = htab->sgot->output_offset + off; + if (r_type == R_390_TLS_IE64 || r_type == R_390_TLS_IEENT) + relocation += htab->sgot->output_section->vma; + unresolved_reloc = FALSE; + } + else + { + bfd_put_64 (output_bfd, htab->sgot->output_offset + off, + contents + rel->r_offset); + continue; + } + break; + + case R_390_TLS_GOTIE12: + case R_390_TLS_IEENT: + if (h == NULL) + { + if (local_got_offsets == NULL) + abort(); + off = local_got_offsets[r_symndx]; + if (info->shared) + goto emit_tls_relocs; + } + else + { + off = h->got.offset; + tls_type = elf_s390_hash_entry(h)->tls_type; + if (info->shared || h->dynindx != -1 || tls_type < GOT_TLS_IE) + goto emit_tls_relocs; + } + + if (htab->sgot == NULL) + abort (); + + BFD_ASSERT (! unresolved_reloc); + bfd_put_64 (output_bfd, -tpoff (info, relocation), + htab->sgot->contents + off); + relocation = htab->sgot->output_offset + off; + if (r_type == R_390_TLS_IEENT) + relocation += htab->sgot->output_section->vma; + unresolved_reloc = FALSE; + break; + + case R_390_TLS_LDM64: + if (! info->shared) + /* The literal pool entry this relocation refers to gets ignored + by the optimized code of the local exec model. Do nothing + and the value will turn out zero. */ + continue; + + if (htab->sgot == NULL) + abort (); + + off = htab->tls_ldm_got.offset; + if (off & 1) + off &= ~1; + else + { + Elf_Internal_Rela outrel; + bfd_byte *loc; + + if (htab->srelgot == NULL) + abort (); + + outrel.r_offset = (htab->sgot->output_section->vma + + htab->sgot->output_offset + off); + + bfd_put_64 (output_bfd, 0, + htab->sgot->contents + off + GOT_ENTRY_SIZE); + outrel.r_info = ELF64_R_INFO (0, R_390_TLS_DTPMOD); + outrel.r_addend = 0; + loc = htab->srelgot->contents; + loc += htab->srelgot->reloc_count++ + * sizeof (Elf64_External_Rela); + bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc); + htab->tls_ldm_got.offset |= 1; + } + relocation = htab->sgot->output_offset + off; + unresolved_reloc = FALSE; + break; + + case R_390_TLS_LE64: + if (info->shared) + { + /* Linking a shared library with non-fpic code requires + a R_390_TLS_TPOFF relocation. */ + Elf_Internal_Rela outrel; + asection *sreloc; + bfd_byte *loc; + int indx; + + outrel.r_offset = rel->r_offset + + input_section->output_section->vma + + input_section->output_offset; + if (h != NULL && h->dynindx != -1) + indx = h->dynindx; + else + indx = 0; + outrel.r_info = ELF64_R_INFO (indx, R_390_TLS_TPOFF); + if (indx == 0) + outrel.r_addend = relocation - dtpoff_base (info); + else + outrel.r_addend = 0; + sreloc = elf_section_data (input_section)->sreloc; + if (sreloc == NULL) + abort (); + loc = sreloc->contents; + loc += sreloc->reloc_count++ * sizeof (Elf64_External_Rela); + bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc); + } + else + { + BFD_ASSERT (! unresolved_reloc); + bfd_put_64 (output_bfd, -tpoff (info, relocation), + contents + rel->r_offset); + } + continue; + + case R_390_TLS_LDO64: + if (info->shared || (input_section->flags & SEC_CODE) == 0) + relocation -= dtpoff_base (info); + else + /* When converting LDO to LE, we must negate. */ + relocation = -tpoff (info, relocation); + break; + + /* Relocations for tls instructions. */ + case R_390_TLS_LOAD: + case R_390_TLS_GDCALL: + case R_390_TLS_LDCALL: + tls_type = GOT_UNKNOWN; + if (h == NULL && local_got_offsets) + tls_type = elf_s390_local_got_tls_type (input_bfd) [r_symndx]; + else if (h != NULL) + tls_type = elf_s390_hash_entry(h)->tls_type; + + if (tls_type == GOT_TLS_GD) + continue; + + if (r_type == R_390_TLS_LOAD) + { + if (!info->shared && (h == NULL || h->dynindx == -1)) + { + /* IE->LE transition. Four valid cases: + lg %rx,(0,%ry) -> sllg %rx,%ry,0 + lg %rx,(%ry,0) -> sllg %rx,%ry,0 + lg %rx,(%ry,%r12) -> sllg %rx,%ry,0 + lg %rx,(%r12,%ry) -> sllg %rx,%ry,0 */ + unsigned int insn0, insn1, ry; + + insn0 = bfd_get_32 (input_bfd, contents + rel->r_offset); + insn1 = bfd_get_16 (input_bfd, contents + rel->r_offset + 4); + if (insn1 != 0x0004) + invalid_tls_insn (input_bfd, input_section, rel); + ry = 0; + if ((insn0 & 0xff00f000) == 0xe3000000) + /* lg %rx,0(%ry,0) -> sllg %rx,%ry,0 */ + ry = (insn0 & 0x000f0000); + else if ((insn0 & 0xff0f0000) == 0xe3000000) + /* lg %rx,0(0,%ry) -> sllg %rx,%ry,0 */ + ry = (insn0 & 0x0000f000) << 4; + else if ((insn0 & 0xff00f000) == 0xe300c000) + /* lg %rx,0(%ry,%r12) -> sllg %rx,%ry,0 */ + ry = (insn0 & 0x000f0000); + else if ((insn0 & 0xff0f0000) == 0xe30c0000) + /* lg %rx,0(%r12,%ry) -> sllg %rx,%ry,0 */ + ry = (insn0 & 0x0000f000) << 4; + else + invalid_tls_insn (input_bfd, input_section, rel); + insn0 = 0xeb000000 | (insn0 & 0x00f00000) | ry; + insn1 = 0x000d; + bfd_put_32 (output_bfd, insn0, contents + rel->r_offset); + bfd_put_16 (output_bfd, insn1, contents + rel->r_offset + 4); + } + } + else if (r_type == R_390_TLS_GDCALL) + { + unsigned int insn0, insn1; + + insn0 = bfd_get_32 (input_bfd, contents + rel->r_offset); + insn1 = bfd_get_16 (input_bfd, contents + rel->r_offset + 4); + if ((insn0 & 0xffff0000) != 0xc0e50000) + invalid_tls_insn (input_bfd, input_section, rel); + if (!info->shared && (h == NULL || h->dynindx == -1)) + { + /* GD->LE transition. + brasl %r14,__tls_get_addr@plt -> brcl 0,. */ + insn0 = 0xc0040000; + insn1 = 0x0000; + } + else + { + /* GD->IE transition. + brasl %r14,__tls_get_addr@plt -> lg %r2,0(%r2,%r12) */ + insn0 = 0xe322c000; + insn1 = 0x0004; + } + bfd_put_32 (output_bfd, insn0, contents + rel->r_offset); + bfd_put_16 (output_bfd, insn1, contents + rel->r_offset + 4); + } + else if (r_type == R_390_TLS_LDCALL) + { + if (!info->shared) + { + unsigned int insn0, insn1; + + insn0 = bfd_get_32 (input_bfd, contents + rel->r_offset); + insn1 = bfd_get_16 (input_bfd, contents + rel->r_offset + 4); + if ((insn0 & 0xffff0000) != 0xc0e50000) + invalid_tls_insn (input_bfd, input_section, rel); + /* LD->LE transition. + brasl %r14,__tls_get_addr@plt -> brcl 0,. */ + insn0 = 0xc0040000; + insn1 = 0x0000; + bfd_put_32 (output_bfd, insn0, contents + rel->r_offset); + bfd_put_16 (output_bfd, insn1, contents + rel->r_offset + 4); + } + } + continue; + default: break; } @@ -2335,7 +3057,10 @@ elf_s390_finish_dynamic_symbol (output_bfd, info, h, sym) } } - if (h->got.offset != (bfd_vma) -1) + if (h->got.offset != (bfd_vma) -1 + && elf_s390_hash_entry(h)->tls_type != GOT_TLS_GD + && elf_s390_hash_entry(h)->tls_type != GOT_TLS_IE + && elf_s390_hash_entry(h)->tls_type != GOT_TLS_IE_NLT) { Elf_Internal_Rela rela; bfd_byte *loc; @@ -2553,13 +3278,6 @@ elf_s390_finish_dynamic_sections (output_bfd, info) return TRUE; } -static bfd_boolean -elf_s390_object_p (abfd) - bfd *abfd; -{ - return bfd_default_set_arch_mach (abfd, bfd_arch_s390, bfd_mach_s390_64); -} - /* * Why was the hash table entry size definition changed from * ARCH_SIZE/8 to 4? This breaks the 64 bit dynamic linker and @@ -2633,6 +3351,7 @@ const struct elf_size_info s390_elf64_size_info = #define elf_backend_size_dynamic_sections elf_s390_size_dynamic_sections #define elf_backend_reloc_type_class elf_s390_reloc_type_class -#define elf_backend_object_p elf_s390_object_p +#define bfd_elf64_mkobject elf_s390_mkobject +#define elf_backend_object_p elf_s390_object_p #include "elf64-target.h" diff --git a/bfd/libbfd.h b/bfd/libbfd.h index 563be32..17162d0 100644 --- a/bfd/libbfd.h +++ b/bfd/libbfd.h @@ -1217,6 +1217,26 @@ static const char *const bfd_reloc_code_real_names[] = { "@@uninitialized@@", "BFD_RELOC_390_PLTOFF16", "BFD_RELOC_390_PLTOFF32", "BFD_RELOC_390_PLTOFF64", + "BFD_RELOC_390_TLS_LOAD", + "BFD_RELOC_390_TLS_GDCALL", + "BFD_RELOC_390_TLS_LDCALL", + "BFD_RELOC_390_TLS_GD32", + "BFD_RELOC_390_TLS_GD64", + "BFD_RELOC_390_TLS_GOTIE12", + "BFD_RELOC_390_TLS_GOTIE32", + "BFD_RELOC_390_TLS_GOTIE64", + "BFD_RELOC_390_TLS_LDM32", + "BFD_RELOC_390_TLS_LDM64", + "BFD_RELOC_390_TLS_IE32", + "BFD_RELOC_390_TLS_IE64", + "BFD_RELOC_390_TLS_IEENT", + "BFD_RELOC_390_TLS_LE32", + "BFD_RELOC_390_TLS_LE64", + "BFD_RELOC_390_TLS_LDO32", + "BFD_RELOC_390_TLS_LDO64", + "BFD_RELOC_390_TLS_DTPMOD", + "BFD_RELOC_390_TLS_DTPOFF", + "BFD_RELOC_390_TLS_TPOFF", "BFD_RELOC_IP2K_FR9", "BFD_RELOC_IP2K_BANK", "BFD_RELOC_IP2K_ADDR16CJP", diff --git a/bfd/reloc.c b/bfd/reloc.c index 7e75770..e98e7ad 100644 --- a/bfd/reloc.c +++ b/bfd/reloc.c @@ -3207,6 +3207,49 @@ ENUMDOC 64-bit rel. offset from the GOT to a PLT entry. ENUM + BFD_RELOC_390_TLS_LOAD +ENUMX + BFD_RELOC_390_TLS_GDCALL +ENUMX + BFD_RELOC_390_TLS_LDCALL +ENUMX + BFD_RELOC_390_TLS_GD32 +ENUMX + BFD_RELOC_390_TLS_GD64 +ENUMX + BFD_RELOC_390_TLS_GOTIE12 +ENUMX + BFD_RELOC_390_TLS_GOTIE32 +ENUMX + BFD_RELOC_390_TLS_GOTIE64 +ENUMX + BFD_RELOC_390_TLS_LDM32 +ENUMX + BFD_RELOC_390_TLS_LDM64 +ENUMX + BFD_RELOC_390_TLS_IE32 +ENUMX + BFD_RELOC_390_TLS_IE64 +ENUMX + BFD_RELOC_390_TLS_IEENT +ENUMX + BFD_RELOC_390_TLS_LE32 +ENUMX + BFD_RELOC_390_TLS_LE64 +ENUMX + BFD_RELOC_390_TLS_LDO32 +ENUMX + BFD_RELOC_390_TLS_LDO64 +ENUMX + BFD_RELOC_390_TLS_DTPMOD +ENUMX + BFD_RELOC_390_TLS_DTPOFF +ENUMX + BFD_RELOC_390_TLS_TPOFF +ENUMDOC + s390 tls relocations. + +ENUM BFD_RELOC_IP2K_FR9 ENUMDOC Scenix IP2K - 9-bit register number / data address |