| /* IBM S/390-specific support for 64-bit ELF |
| Copyright 2000, 2001, 2002, 2003 Free Software Foundation, Inc. |
| Contributed Martin Schwidefsky (schwidefsky@de.ibm.com). |
| |
| This file is part of BFD, the Binary File Descriptor library. |
| |
| This program is free software; you can redistribute it and/or modify |
| it under the terms of the GNU General Public License as published by |
| the Free Software Foundation; either version 2 of the License, or |
| (at your option) any later version. |
| |
| This program is distributed in the hope that it will be useful, |
| but WITHOUT ANY WARRANTY; without even the implied warranty of |
| MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| GNU General Public License for more details. |
| |
| You should have received a copy of the GNU General Public License |
| along with this program; if not, write to the Free Software |
| Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA |
| 02111-1307, USA. */ |
| |
| #include "bfd.h" |
| #include "sysdep.h" |
| #include "bfdlink.h" |
| #include "libbfd.h" |
| #include "elf-bfd.h" |
| |
| static reloc_howto_type *elf_s390_reloc_type_lookup |
| PARAMS ((bfd *, bfd_reloc_code_real_type)); |
| static void elf_s390_info_to_howto |
| PARAMS ((bfd *, arelent *, Elf_Internal_Rela *)); |
| static bfd_boolean elf_s390_is_local_label_name |
| PARAMS ((bfd *, const char *)); |
| static struct bfd_hash_entry *link_hash_newfunc |
| PARAMS ((struct bfd_hash_entry *, struct bfd_hash_table *, const char *)); |
| static struct bfd_link_hash_table *elf_s390_link_hash_table_create |
| PARAMS ((bfd *)); |
| static bfd_boolean create_got_section |
| PARAMS((bfd *, struct bfd_link_info *)); |
| static bfd_boolean elf_s390_create_dynamic_sections |
| PARAMS((bfd *, struct bfd_link_info *)); |
| static void elf_s390_copy_indirect_symbol |
| PARAMS ((struct elf_backend_data *, struct elf_link_hash_entry *, |
| struct elf_link_hash_entry *)); |
| static bfd_boolean elf_s390_check_relocs |
| PARAMS ((bfd *, struct bfd_link_info *, asection *, |
| const Elf_Internal_Rela *)); |
| static asection *elf_s390_gc_mark_hook |
| PARAMS ((asection *, struct bfd_link_info *, Elf_Internal_Rela *, |
| struct elf_link_hash_entry *, Elf_Internal_Sym *)); |
| static bfd_boolean elf_s390_gc_sweep_hook |
| PARAMS ((bfd *, struct bfd_link_info *, asection *, |
| const Elf_Internal_Rela *)); |
| struct elf_s390_link_hash_entry; |
| static void elf_s390_adjust_gotplt |
| PARAMS ((struct elf_s390_link_hash_entry *)); |
| static bfd_boolean elf_s390_adjust_dynamic_symbol |
| PARAMS ((struct bfd_link_info *, struct elf_link_hash_entry *)); |
| static bfd_boolean allocate_dynrelocs |
| PARAMS ((struct elf_link_hash_entry *, PTR)); |
| static bfd_boolean readonly_dynrelocs |
| PARAMS ((struct elf_link_hash_entry *, PTR)); |
| static bfd_boolean elf_s390_size_dynamic_sections |
| PARAMS ((bfd *, struct bfd_link_info *)); |
| static bfd_boolean elf_s390_relocate_section |
| PARAMS ((bfd *, struct bfd_link_info *, bfd *, asection *, bfd_byte *, |
| Elf_Internal_Rela *, Elf_Internal_Sym *, asection **)); |
| static bfd_boolean elf_s390_finish_dynamic_symbol |
| PARAMS ((bfd *, struct bfd_link_info *, struct elf_link_hash_entry *, |
| Elf_Internal_Sym *)); |
| 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" |
| |
| /* In case we're on a 32-bit machine, construct a 64-bit "-1" value |
| from smaller values. Start with zero, widen, *then* decrement. */ |
| #define MINUS_ONE (((bfd_vma)0) - 1) |
| |
| /* The relocation "howto" table. */ |
| static reloc_howto_type elf_howto_table[] = |
| { |
| HOWTO (R_390_NONE, /* type */ |
| 0, /* rightshift */ |
| 0, /* size (0 = byte, 1 = short, 2 = long) */ |
| 0, /* bitsize */ |
| FALSE, /* pc_relative */ |
| 0, /* bitpos */ |
| complain_overflow_dont, /* complain_on_overflow */ |
| bfd_elf_generic_reloc, /* special_function */ |
| "R_390_NONE", /* name */ |
| FALSE, /* partial_inplace */ |
| 0, /* src_mask */ |
| 0, /* dst_mask */ |
| FALSE), /* pcrel_offset */ |
| |
| HOWTO(R_390_8, 0, 0, 8, FALSE, 0, complain_overflow_bitfield, |
| bfd_elf_generic_reloc, "R_390_8", FALSE, 0,0x000000ff, FALSE), |
| HOWTO(R_390_12, 0, 1, 12, FALSE, 0, complain_overflow_dont, |
| bfd_elf_generic_reloc, "R_390_12", FALSE, 0,0x00000fff, FALSE), |
| HOWTO(R_390_16, 0, 1, 16, FALSE, 0, complain_overflow_bitfield, |
| bfd_elf_generic_reloc, "R_390_16", FALSE, 0,0x0000ffff, FALSE), |
| HOWTO(R_390_32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield, |
| bfd_elf_generic_reloc, "R_390_32", FALSE, 0,0xffffffff, FALSE), |
| HOWTO(R_390_PC32, 0, 2, 32, TRUE, 0, complain_overflow_bitfield, |
| bfd_elf_generic_reloc, "R_390_PC32", FALSE, 0,0xffffffff, TRUE), |
| HOWTO(R_390_GOT12, 0, 1, 12, FALSE, 0, complain_overflow_dont, |
| bfd_elf_generic_reloc, "R_390_GOT12", FALSE, 0,0x00000fff, FALSE), |
| HOWTO(R_390_GOT32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield, |
| bfd_elf_generic_reloc, "R_390_GOT32", FALSE, 0,0xffffffff, FALSE), |
| HOWTO(R_390_PLT32, 0, 2, 32, TRUE, 0, complain_overflow_bitfield, |
| bfd_elf_generic_reloc, "R_390_PLT32", FALSE, 0,0xffffffff, TRUE), |
| HOWTO(R_390_COPY, 0, 4, 64, FALSE, 0, complain_overflow_bitfield, |
| bfd_elf_generic_reloc, "R_390_COPY", FALSE, 0,MINUS_ONE, FALSE), |
| HOWTO(R_390_GLOB_DAT, 0, 4, 64, FALSE, 0, complain_overflow_bitfield, |
| bfd_elf_generic_reloc, "R_390_GLOB_DAT", FALSE, 0,MINUS_ONE, FALSE), |
| HOWTO(R_390_JMP_SLOT, 0, 4, 64, FALSE, 0, complain_overflow_bitfield, |
| bfd_elf_generic_reloc, "R_390_JMP_SLOT", FALSE, 0,MINUS_ONE, FALSE), |
| HOWTO(R_390_RELATIVE, 0, 4, 64, TRUE, 0, complain_overflow_bitfield, |
| bfd_elf_generic_reloc, "R_390_RELATIVE", FALSE, 0,MINUS_ONE, FALSE), |
| HOWTO(R_390_GOTOFF32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield, |
| bfd_elf_generic_reloc, "R_390_GOTOFF32", FALSE, 0,MINUS_ONE, FALSE), |
| HOWTO(R_390_GOTPC, 0, 4, 64, TRUE, 0, complain_overflow_bitfield, |
| bfd_elf_generic_reloc, "R_390_GOTPC", FALSE, 0,MINUS_ONE, TRUE), |
| HOWTO(R_390_GOT16, 0, 1, 16, FALSE, 0, complain_overflow_bitfield, |
| bfd_elf_generic_reloc, "R_390_GOT16", FALSE, 0,0x0000ffff, FALSE), |
| HOWTO(R_390_PC16, 0, 1, 16, TRUE, 0, complain_overflow_bitfield, |
| bfd_elf_generic_reloc, "R_390_PC16", FALSE, 0,0x0000ffff, TRUE), |
| HOWTO(R_390_PC16DBL, 1, 1, 16, TRUE, 0, complain_overflow_bitfield, |
| bfd_elf_generic_reloc, "R_390_PC16DBL", FALSE, 0,0x0000ffff, TRUE), |
| HOWTO(R_390_PLT16DBL, 1, 1, 16, TRUE, 0, complain_overflow_bitfield, |
| bfd_elf_generic_reloc, "R_390_PLT16DBL", FALSE, 0,0x0000ffff, TRUE), |
| HOWTO(R_390_PC32DBL, 1, 2, 32, TRUE, 0, complain_overflow_bitfield, |
| bfd_elf_generic_reloc, "R_390_PC32DBL", FALSE, 0,0xffffffff, TRUE), |
| HOWTO(R_390_PLT32DBL, 1, 2, 32, TRUE, 0, complain_overflow_bitfield, |
| bfd_elf_generic_reloc, "R_390_PLT32DBL", FALSE, 0,0xffffffff, TRUE), |
| HOWTO(R_390_GOTPCDBL, 1, 2, 32, TRUE, 0, complain_overflow_bitfield, |
| bfd_elf_generic_reloc, "R_390_GOTPCDBL", FALSE, 0,MINUS_ONE, TRUE), |
| HOWTO(R_390_64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield, |
| bfd_elf_generic_reloc, "R_390_64", FALSE, 0,MINUS_ONE, FALSE), |
| HOWTO(R_390_PC64, 0, 4, 64, TRUE, 0, complain_overflow_bitfield, |
| bfd_elf_generic_reloc, "R_390_PC64", FALSE, 0,MINUS_ONE, TRUE), |
| HOWTO(R_390_GOT64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield, |
| bfd_elf_generic_reloc, "R_390_GOT64", FALSE, 0,MINUS_ONE, FALSE), |
| HOWTO(R_390_PLT64, 0, 4, 64, TRUE, 0, complain_overflow_bitfield, |
| bfd_elf_generic_reloc, "R_390_PLT64", FALSE, 0,MINUS_ONE, TRUE), |
| HOWTO(R_390_GOTENT, 1, 2, 32, TRUE, 0, complain_overflow_bitfield, |
| bfd_elf_generic_reloc, "R_390_GOTENT", FALSE, 0,MINUS_ONE, TRUE), |
| HOWTO(R_390_GOTOFF16, 0, 1, 16, FALSE, 0, complain_overflow_bitfield, |
| bfd_elf_generic_reloc, "R_390_GOTOFF16", FALSE, 0,0x0000ffff, FALSE), |
| HOWTO(R_390_GOTOFF64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield, |
| bfd_elf_generic_reloc, "R_390_GOTOFF64", FALSE, 0,MINUS_ONE, FALSE), |
| HOWTO(R_390_GOTPLT12, 0, 1, 12, FALSE, 0, complain_overflow_dont, |
| bfd_elf_generic_reloc, "R_390_GOTPLT12", FALSE, 0,0x00000fff, FALSE), |
| HOWTO(R_390_GOTPLT16, 0, 1, 16, FALSE, 0, complain_overflow_bitfield, |
| bfd_elf_generic_reloc, "R_390_GOTPLT16", FALSE, 0,0x0000ffff, FALSE), |
| HOWTO(R_390_GOTPLT32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield, |
| bfd_elf_generic_reloc, "R_390_GOTPLT32", FALSE, 0,0xffffffff, FALSE), |
| HOWTO(R_390_GOTPLT64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield, |
| bfd_elf_generic_reloc, "R_390_GOTPLT64", FALSE, 0,MINUS_ONE, FALSE), |
| HOWTO(R_390_GOTPLTENT, 1, 2, 32, TRUE, 0, complain_overflow_bitfield, |
| bfd_elf_generic_reloc, "R_390_GOTPLTENT",FALSE, 0,MINUS_ONE, TRUE), |
| HOWTO(R_390_PLTOFF16, 0, 1, 16, FALSE, 0, complain_overflow_bitfield, |
| bfd_elf_generic_reloc, "R_390_PLTOFF16", FALSE, 0,0x0000ffff, FALSE), |
| HOWTO(R_390_PLTOFF32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield, |
| 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. */ |
| static reloc_howto_type elf64_s390_vtinherit_howto = |
| HOWTO (R_390_GNU_VTINHERIT, 0,4,0,FALSE,0,complain_overflow_dont, NULL, "R_390_GNU_VTINHERIT", FALSE,0, 0, FALSE); |
| static reloc_howto_type elf64_s390_vtentry_howto = |
| HOWTO (R_390_GNU_VTENTRY, 0,4,0,FALSE,0,complain_overflow_dont, _bfd_elf_rel_vtable_reloc_fn,"R_390_GNU_VTENTRY", FALSE,0,0, FALSE); |
| |
| static reloc_howto_type * |
| elf_s390_reloc_type_lookup (abfd, code) |
| bfd *abfd ATTRIBUTE_UNUSED; |
| bfd_reloc_code_real_type code; |
| { |
| switch (code) |
| { |
| case BFD_RELOC_NONE: |
| return &elf_howto_table[(int) R_390_NONE]; |
| case BFD_RELOC_8: |
| return &elf_howto_table[(int) R_390_8]; |
| case BFD_RELOC_390_12: |
| return &elf_howto_table[(int) R_390_12]; |
| case BFD_RELOC_16: |
| return &elf_howto_table[(int) R_390_16]; |
| case BFD_RELOC_32: |
| return &elf_howto_table[(int) R_390_32]; |
| case BFD_RELOC_CTOR: |
| return &elf_howto_table[(int) R_390_32]; |
| case BFD_RELOC_32_PCREL: |
| return &elf_howto_table[(int) R_390_PC32]; |
| case BFD_RELOC_390_GOT12: |
| return &elf_howto_table[(int) R_390_GOT12]; |
| case BFD_RELOC_32_GOT_PCREL: |
| return &elf_howto_table[(int) R_390_GOT32]; |
| case BFD_RELOC_390_PLT32: |
| return &elf_howto_table[(int) R_390_PLT32]; |
| case BFD_RELOC_390_COPY: |
| return &elf_howto_table[(int) R_390_COPY]; |
| case BFD_RELOC_390_GLOB_DAT: |
| return &elf_howto_table[(int) R_390_GLOB_DAT]; |
| case BFD_RELOC_390_JMP_SLOT: |
| return &elf_howto_table[(int) R_390_JMP_SLOT]; |
| case BFD_RELOC_390_RELATIVE: |
| return &elf_howto_table[(int) R_390_RELATIVE]; |
| case BFD_RELOC_32_GOTOFF: |
| return &elf_howto_table[(int) R_390_GOTOFF32]; |
| case BFD_RELOC_390_GOTPC: |
| return &elf_howto_table[(int) R_390_GOTPC]; |
| case BFD_RELOC_390_GOT16: |
| return &elf_howto_table[(int) R_390_GOT16]; |
| case BFD_RELOC_16_PCREL: |
| return &elf_howto_table[(int) R_390_PC16]; |
| case BFD_RELOC_390_PC16DBL: |
| return &elf_howto_table[(int) R_390_PC16DBL]; |
| case BFD_RELOC_390_PLT16DBL: |
| return &elf_howto_table[(int) R_390_PLT16DBL]; |
| case BFD_RELOC_390_PC32DBL: |
| return &elf_howto_table[(int) R_390_PC32DBL]; |
| case BFD_RELOC_390_PLT32DBL: |
| return &elf_howto_table[(int) R_390_PLT32DBL]; |
| case BFD_RELOC_390_GOTPCDBL: |
| return &elf_howto_table[(int) R_390_GOTPCDBL]; |
| case BFD_RELOC_64: |
| return &elf_howto_table[(int) R_390_64]; |
| case BFD_RELOC_64_PCREL: |
| return &elf_howto_table[(int) R_390_PC64]; |
| case BFD_RELOC_390_GOT64: |
| return &elf_howto_table[(int) R_390_GOT64]; |
| case BFD_RELOC_390_PLT64: |
| return &elf_howto_table[(int) R_390_PLT64]; |
| case BFD_RELOC_390_GOTENT: |
| return &elf_howto_table[(int) R_390_GOTENT]; |
| case BFD_RELOC_16_GOTOFF: |
| return &elf_howto_table[(int) R_390_GOTOFF16]; |
| case BFD_RELOC_390_GOTOFF64: |
| return &elf_howto_table[(int) R_390_GOTOFF64]; |
| case BFD_RELOC_390_GOTPLT12: |
| return &elf_howto_table[(int) R_390_GOTPLT12]; |
| case BFD_RELOC_390_GOTPLT16: |
| return &elf_howto_table[(int) R_390_GOTPLT16]; |
| case BFD_RELOC_390_GOTPLT32: |
| return &elf_howto_table[(int) R_390_GOTPLT32]; |
| case BFD_RELOC_390_GOTPLT64: |
| return &elf_howto_table[(int) R_390_GOTPLT64]; |
| case BFD_RELOC_390_GOTPLTENT: |
| return &elf_howto_table[(int) R_390_GOTPLTENT]; |
| case BFD_RELOC_390_PLTOFF16: |
| 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_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: |
| return &elf64_s390_vtentry_howto; |
| default: |
| break; |
| } |
| return 0; |
| } |
| |
| /* We need to use ELF64_R_TYPE so we have our own copy of this function, |
| and elf64-s390.c has its own copy. */ |
| |
| static void |
| elf_s390_info_to_howto (abfd, cache_ptr, dst) |
| bfd *abfd ATTRIBUTE_UNUSED; |
| arelent *cache_ptr; |
| Elf_Internal_Rela *dst; |
| { |
| switch (ELF64_R_TYPE(dst->r_info)) |
| { |
| case R_390_GNU_VTINHERIT: |
| cache_ptr->howto = &elf64_s390_vtinherit_howto; |
| break; |
| |
| case R_390_GNU_VTENTRY: |
| cache_ptr->howto = &elf64_s390_vtentry_howto; |
| break; |
| |
| default: |
| BFD_ASSERT (ELF64_R_TYPE(dst->r_info) < (unsigned int) R_390_max); |
| cache_ptr->howto = &elf_howto_table[ELF64_R_TYPE(dst->r_info)]; |
| } |
| } |
| |
| /* 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; |
| const char *name; |
| { |
| if (name[0] == '.' && (name[1] == 'X' || name[1] == 'L')) |
| return TRUE; |
| |
| return _bfd_elf_is_local_label_name (abfd, name); |
| } |
| |
| /* Functions for the 390 ELF linker. */ |
| |
| /* The name of the dynamic interpreter. This is put in the .interp |
| section. */ |
| |
| #define ELF_DYNAMIC_INTERPRETER "/usr/lib/ld.so.1" |
| |
| /* The size in bytes of the first entry in the procedure linkage table. */ |
| #define PLT_FIRST_ENTRY_SIZE 32 |
| /* The size in bytes of an entry in the procedure linkage table. */ |
| #define PLT_ENTRY_SIZE 32 |
| |
| #define GOT_ENTRY_SIZE 8 |
| |
| /* The first three entries in a procedure linkage table are reserved, |
| and the initial contents are unimportant (we zero them out). |
| Subsequent entries look like this. See the SVR4 ABI 386 |
| supplement to see how this works. */ |
| |
| /* For the s390, simple addr offset can only be 0 - 4096. |
| To use the full 16777216 TB address space, several instructions |
| are needed to load an address in a register and execute |
| a branch( or just saving the address) |
| |
| Furthermore, only r 0 and 1 are free to use!!! */ |
| |
| /* The first 3 words in the GOT are then reserved. |
| Word 0 is the address of the dynamic table. |
| Word 1 is a pointer to a structure describing the object |
| Word 2 is used to point to the loader entry address. |
| |
| The code for PLT entries looks like this: |
| |
| The GOT holds the address in the PLT to be executed. |
| The loader then gets: |
| 24(15) = Pointer to the structure describing the object. |
| 28(15) = Offset in symbol table |
| The loader must then find the module where the function is |
| and insert the address in the GOT. |
| |
| PLT1: LARL 1,<fn>@GOTENT # 6 bytes Load address of GOT entry in r1 |
| LG 1,0(1) # 6 bytes Load address from GOT in r1 |
| BCR 15,1 # 2 bytes Jump to address |
| RET1: BASR 1,0 # 2 bytes Return from GOT 1st time |
| LGF 1,12(1) # 6 bytes Load offset in symbl table in r1 |
| BRCL 15,-x # 6 bytes Jump to start of PLT |
| .long ? # 4 bytes offset into symbol table |
| |
| Total = 32 bytes per PLT entry |
| Fixup at offset 2: relative address to GOT entry |
| Fixup at offset 22: relative branch to PLT0 |
| Fixup at offset 28: 32 bit offset into symbol table |
| |
| A 32 bit offset into the symbol table is enough. It allows for symbol |
| tables up to a size of 2 gigabyte. A single dynamic object (the main |
| program, any shared library) is limited to 4GB in size and I want to see |
| the program that manages to have a symbol table of more than 2 GB with a |
| total size of at max 4 GB. */ |
| |
| #define PLT_ENTRY_WORD0 (bfd_vma) 0xc0100000 |
| #define PLT_ENTRY_WORD1 (bfd_vma) 0x0000e310 |
| #define PLT_ENTRY_WORD2 (bfd_vma) 0x10000004 |
| #define PLT_ENTRY_WORD3 (bfd_vma) 0x07f10d10 |
| #define PLT_ENTRY_WORD4 (bfd_vma) 0xe310100c |
| #define PLT_ENTRY_WORD5 (bfd_vma) 0x0014c0f4 |
| #define PLT_ENTRY_WORD6 (bfd_vma) 0x00000000 |
| #define PLT_ENTRY_WORD7 (bfd_vma) 0x00000000 |
| |
| /* The first PLT entry pushes the offset into the symbol table |
| from R1 onto the stack at 8(15) and the loader object info |
| at 12(15), loads the loader address in R1 and jumps to it. */ |
| |
| /* The first entry in the PLT: |
| |
| PLT0: |
| STG 1,56(15) # r1 contains the offset into the symbol table |
| LARL 1,_GLOBAL_OFFSET_TABLE # load address of global offset table |
| MVC 48(8,15),8(1) # move loader ino (object struct address) to stack |
| LG 1,16(1) # get entry address of loader |
| BCR 15,1 # jump to loader |
| |
| Fixup at offset 8: relative address to start of GOT. */ |
| |
| #define PLT_FIRST_ENTRY_WORD0 (bfd_vma) 0xe310f038 |
| #define PLT_FIRST_ENTRY_WORD1 (bfd_vma) 0x0024c010 |
| #define PLT_FIRST_ENTRY_WORD2 (bfd_vma) 0x00000000 |
| #define PLT_FIRST_ENTRY_WORD3 (bfd_vma) 0xd207f030 |
| #define PLT_FIRST_ENTRY_WORD4 (bfd_vma) 0x1008e310 |
| #define PLT_FIRST_ENTRY_WORD5 (bfd_vma) 0x10100004 |
| #define PLT_FIRST_ENTRY_WORD6 (bfd_vma) 0x07f10700 |
| #define PLT_FIRST_ENTRY_WORD7 (bfd_vma) 0x07000700 |
| |
| /* The s390 linker needs to keep track of the number of relocs that it |
| decides to copy as dynamic relocs in check_relocs for each symbol. |
| This is so that it can later discard them if they are found to be |
| unnecessary. We store the information in a field extending the |
| regular ELF linker hash table. */ |
| |
| struct elf_s390_dyn_relocs |
| { |
| struct elf_s390_dyn_relocs *next; |
| |
| /* The input section of the reloc. */ |
| asection *sec; |
| |
| /* Total number of relocs copied for the input section. */ |
| bfd_size_type count; |
| |
| /* Number of pc-relative relocs copied for the input section. */ |
| bfd_size_type pc_count; |
| }; |
| |
| /* s390 ELF linker hash entry. */ |
| |
| struct elf_s390_link_hash_entry |
| { |
| struct elf_link_hash_entry elf; |
| |
| /* Track dynamic relocs copied for this symbol. */ |
| struct elf_s390_dyn_relocs *dyn_relocs; |
| |
| /* 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 |
| { |
| struct elf_link_hash_table elf; |
| |
| /* Short-cuts to get to dynamic linker sections. */ |
| asection *sgot; |
| asection *sgotplt; |
| asection *srelgot; |
| asection *splt; |
| asection *srelplt; |
| 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; |
| }; |
| |
| /* Get the s390 ELF linker hash table from a link_info structure. */ |
| |
| #define elf_s390_hash_table(p) \ |
| ((struct elf_s390_link_hash_table *) ((p)->hash)) |
| |
| /* Create an entry in an s390 ELF linker hash table. */ |
| |
| static struct bfd_hash_entry * |
| link_hash_newfunc (entry, table, string) |
| struct bfd_hash_entry *entry; |
| struct bfd_hash_table *table; |
| const char *string; |
| { |
| /* Allocate the structure if it has not already been allocated by a |
| subclass. */ |
| if (entry == NULL) |
| { |
| entry = bfd_hash_allocate (table, |
| sizeof (struct elf_s390_link_hash_entry)); |
| if (entry == NULL) |
| return entry; |
| } |
| |
| /* Call the allocation method of the superclass. */ |
| entry = _bfd_elf_link_hash_newfunc (entry, table, string); |
| if (entry != NULL) |
| { |
| struct elf_s390_link_hash_entry *eh; |
| |
| eh = (struct elf_s390_link_hash_entry *) entry; |
| eh->dyn_relocs = NULL; |
| eh->gotplt_refcount = 0; |
| eh->tls_type = GOT_UNKNOWN; |
| } |
| |
| return entry; |
| } |
| |
| /* Create an s390 ELF linker hash table. */ |
| |
| static struct bfd_link_hash_table * |
| elf_s390_link_hash_table_create (abfd) |
| bfd *abfd; |
| { |
| struct elf_s390_link_hash_table *ret; |
| bfd_size_type amt = sizeof (struct elf_s390_link_hash_table); |
| |
| ret = (struct elf_s390_link_hash_table *) bfd_malloc (amt); |
| if (ret == NULL) |
| return NULL; |
| |
| if (! _bfd_elf_link_hash_table_init (&ret->elf, abfd, link_hash_newfunc)) |
| { |
| free (ret); |
| return NULL; |
| } |
| |
| ret->sgot = NULL; |
| ret->sgotplt = NULL; |
| ret->srelgot = NULL; |
| ret->splt = NULL; |
| ret->srelplt = NULL; |
| ret->sdynbss = NULL; |
| ret->srelbss = NULL; |
| ret->tls_ldm_got.refcount = 0; |
| ret->sym_sec.abfd = NULL; |
| |
| return &ret->elf.root; |
| } |
| |
| /* Create .got, .gotplt, and .rela.got sections in DYNOBJ, and set up |
| shortcuts to them in our hash table. */ |
| |
| static bfd_boolean |
| create_got_section (dynobj, info) |
| bfd *dynobj; |
| struct bfd_link_info *info; |
| { |
| struct elf_s390_link_hash_table *htab; |
| |
| if (! _bfd_elf_create_got_section (dynobj, info)) |
| return FALSE; |
| |
| htab = elf_s390_hash_table (info); |
| htab->sgot = bfd_get_section_by_name (dynobj, ".got"); |
| htab->sgotplt = bfd_get_section_by_name (dynobj, ".got.plt"); |
| if (!htab->sgot || !htab->sgotplt) |
| abort (); |
| |
| htab->srelgot = bfd_make_section (dynobj, ".rela.got"); |
| if (htab->srelgot == NULL |
| || ! bfd_set_section_flags (dynobj, htab->srelgot, |
| (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS |
| | SEC_IN_MEMORY | SEC_LINKER_CREATED |
| | SEC_READONLY)) |
| || ! bfd_set_section_alignment (dynobj, htab->srelgot, 3)) |
| return FALSE; |
| return TRUE; |
| } |
| |
| /* Create .plt, .rela.plt, .got, .got.plt, .rela.got, .dynbss, and |
| .rela.bss sections in DYNOBJ, and set up shortcuts to them in our |
| hash table. */ |
| |
| static bfd_boolean |
| elf_s390_create_dynamic_sections (dynobj, info) |
| bfd *dynobj; |
| struct bfd_link_info *info; |
| { |
| struct elf_s390_link_hash_table *htab; |
| |
| htab = elf_s390_hash_table (info); |
| if (!htab->sgot && !create_got_section (dynobj, info)) |
| return FALSE; |
| |
| if (!_bfd_elf_create_dynamic_sections (dynobj, info)) |
| return FALSE; |
| |
| htab->splt = bfd_get_section_by_name (dynobj, ".plt"); |
| htab->srelplt = bfd_get_section_by_name (dynobj, ".rela.plt"); |
| htab->sdynbss = bfd_get_section_by_name (dynobj, ".dynbss"); |
| if (!info->shared) |
| htab->srelbss = bfd_get_section_by_name (dynobj, ".rela.bss"); |
| |
| if (!htab->splt || !htab->srelplt || !htab->sdynbss |
| || (!info->shared && !htab->srelbss)) |
| abort (); |
| |
| return TRUE; |
| } |
| |
| /* Copy the extra info we tack onto an elf_link_hash_entry. */ |
| |
| static void |
| elf_s390_copy_indirect_symbol (bed, dir, ind) |
| struct elf_backend_data *bed; |
| struct elf_link_hash_entry *dir, *ind; |
| { |
| struct elf_s390_link_hash_entry *edir, *eind; |
| |
| edir = (struct elf_s390_link_hash_entry *) dir; |
| eind = (struct elf_s390_link_hash_entry *) ind; |
| |
| if (eind->dyn_relocs != NULL) |
| { |
| if (edir->dyn_relocs != NULL) |
| { |
| struct elf_s390_dyn_relocs **pp; |
| struct elf_s390_dyn_relocs *p; |
| |
| if (ind->root.type == bfd_link_hash_indirect) |
| abort (); |
| |
| /* Add reloc counts against the weak sym to the strong sym |
| list. Merge any entries against the same section. */ |
| for (pp = &eind->dyn_relocs; (p = *pp) != NULL; ) |
| { |
| struct elf_s390_dyn_relocs *q; |
| |
| for (q = edir->dyn_relocs; q != NULL; q = q->next) |
| if (q->sec == p->sec) |
| { |
| q->pc_count += p->pc_count; |
| q->count += p->count; |
| *pp = p->next; |
| break; |
| } |
| if (q == NULL) |
| pp = &p->next; |
| } |
| *pp = edir->dyn_relocs; |
| } |
| |
| edir->dyn_relocs = eind->dyn_relocs; |
| 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. */ |
| |
| static bfd_boolean |
| elf_s390_check_relocs (abfd, info, sec, relocs) |
| bfd *abfd; |
| struct bfd_link_info *info; |
| asection *sec; |
| const Elf_Internal_Rela *relocs; |
| { |
| struct elf_s390_link_hash_table *htab; |
| Elf_Internal_Shdr *symtab_hdr; |
| struct elf_link_hash_entry **sym_hashes; |
| const Elf_Internal_Rela *rel; |
| 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; |
| |
| htab = elf_s390_hash_table (info); |
| symtab_hdr = &elf_tdata (abfd)->symtab_hdr; |
| sym_hashes = elf_sym_hashes (abfd); |
| local_got_refcounts = elf_local_got_refcounts (abfd); |
| |
| sreloc = NULL; |
| |
| 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; |
| |
| r_symndx = ELF64_R_SYM (rel->r_info); |
| |
| if (r_symndx >= NUM_SHDR_ENTRIES (symtab_hdr)) |
| { |
| (*_bfd_error_handler) (_("%s: bad symbol index: %d"), |
| bfd_archive_filename (abfd), |
| r_symndx); |
| return FALSE; |
| } |
| |
| if (r_symndx < symtab_hdr->sh_info) |
| h = NULL; |
| else |
| h = sym_hashes[r_symndx - symtab_hdr->sh_info]; |
| |
| /* Create got section and local_got_refcounts array if they |
| are needed. */ |
| 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: |
| case R_390_GOT32: |
| case R_390_GOT64: |
| case R_390_GOTENT: |
| case R_390_GOTPLT12: |
| case R_390_GOTPLT16: |
| 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) + 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: |
| case R_390_GOTOFF32: |
| case R_390_GOTOFF64: |
| case R_390_GOTPC: |
| case R_390_GOTPCDBL: |
| if (htab->sgot == NULL) |
| { |
| if (htab->elf.dynobj == NULL) |
| htab->elf.dynobj = abfd; |
| if (!create_got_section (htab->elf.dynobj, info)) |
| return FALSE; |
| } |
| } |
| |
| switch (r_type) |
| { |
| case R_390_GOTOFF16: |
| case R_390_GOTOFF32: |
| case R_390_GOTOFF64: |
| case R_390_GOTPC: |
| case R_390_GOTPCDBL: |
| /* Got is created, nothing to be done. */ |
| 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: |
| /* This symbol requires a procedure linkage table entry. We |
| actually build the entry in adjust_dynamic_symbol, |
| because this might be a case of linking PIC code which is |
| never referenced by a dynamic object, in which case we |
| don't need to generate a procedure linkage table entry |
| after all. */ |
| |
| /* If this is a local symbol, we resolve it directly without |
| creating a procedure linkage table entry. */ |
| if (h != NULL) |
| { |
| h->elf_link_hash_flags |= ELF_LINK_HASH_NEEDS_PLT; |
| 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: |
| /* This symbol requires either a procedure linkage table entry |
| or an entry in the local got. We actually build the entry |
| in adjust_dynamic_symbol because whether this is really a |
| global reference can change and with it the fact if we have |
| to create a plt entry or a local got entry. To be able to |
| make a once global symbol a local one we have to keep track |
| of the number of gotplt references that exist for this |
| symbol. */ |
| if (h != NULL) |
| { |
| ((struct elf_s390_link_hash_entry *) h)->gotplt_refcount++; |
| h->elf_link_hash_flags |= ELF_LINK_HASH_NEEDS_PLT; |
| 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]; |
| } |
| /* 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: |
| case R_390_32: |
| case R_390_64: |
| case R_390_PC16: |
| case R_390_PC16DBL: |
| case R_390_PC32: |
| case R_390_PC32DBL: |
| case R_390_PC64: |
| if (h != NULL && !info->shared) |
| { |
| /* If this reloc is in a read-only section, we might |
| need a copy reloc. We can't check reliably at this |
| stage whether the section is read-only, as input |
| sections have not yet been mapped to output sections. |
| Tentatively set the flag for now, and correct in |
| adjust_dynamic_symbol. */ |
| h->elf_link_hash_flags |= ELF_LINK_NON_GOT_REF; |
| |
| /* We may need a .plt entry if the function this reloc |
| refers to is in a shared lib. */ |
| h->plt.refcount += 1; |
| } |
| |
| /* If we are creating a shared library, and this is a reloc |
| against a global symbol, or a non PC relative reloc |
| against a local symbol, then we need to copy the reloc |
| into the shared library. However, if we are linking with |
| -Bsymbolic, we do not need to copy a reloc against a |
| global symbol which is defined in an object we are |
| including in the link (i.e., DEF_REGULAR is set). At |
| this point we have not seen all the input files, so it is |
| possible that DEF_REGULAR is not set now but will be set |
| later (it is never cleared). In case of a weak definition, |
| DEF_REGULAR may be cleared later by a strong definition in |
| a shared library. We account for that possibility below by |
| storing information in the relocs_copied field of the hash |
| table entry. A similar situation occurs when creating |
| shared libraries and symbol visibility changes render the |
| symbol local. |
| |
| If on the other hand, we are creating an executable, we |
| may need to keep relocations for symbols satisfied by a |
| dynamic library if we manage to avoid copy relocs for the |
| symbol. */ |
| if ((info->shared |
| && (sec->flags & SEC_ALLOC) != 0 |
| && ((ELF64_R_TYPE (rel->r_info) != R_390_PC16 |
| && ELF64_R_TYPE (rel->r_info) != R_390_PC16DBL |
| && ELF64_R_TYPE (rel->r_info) != R_390_PC32 |
| && ELF64_R_TYPE (rel->r_info) != R_390_PC32DBL |
| && ELF64_R_TYPE (rel->r_info) != R_390_PC64) |
| || (h != NULL |
| && (! info->symbolic |
| || h->root.type == bfd_link_hash_defweak |
| || (h->elf_link_hash_flags |
| & ELF_LINK_HASH_DEF_REGULAR) == 0)))) |
| || (!info->shared |
| && (sec->flags & SEC_ALLOC) != 0 |
| && h != NULL |
| && (h->root.type == bfd_link_hash_defweak |
| || (h->elf_link_hash_flags |
| & ELF_LINK_HASH_DEF_REGULAR) == 0))) |
| { |
| struct elf_s390_dyn_relocs *p; |
| struct elf_s390_dyn_relocs **head; |
| |
| /* We must copy these reloc types into the output file. |
| Create a reloc section in dynobj and make room for |
| this reloc. */ |
| if (sreloc == NULL) |
| { |
| const char *name; |
| bfd *dynobj; |
| |
| name = (bfd_elf_string_from_elf_section |
| (abfd, |
| elf_elfheader (abfd)->e_shstrndx, |
| elf_section_data (sec)->rel_hdr.sh_name)); |
| if (name == NULL) |
| return FALSE; |
| |
| if (strncmp (name, ".rela", 5) != 0 |
| || strcmp (bfd_get_section_name (abfd, sec), |
| name + 5) != 0) |
| { |
| (*_bfd_error_handler) |
| (_("%s: bad relocation section name `%s\'"), |
| bfd_archive_filename (abfd), name); |
| } |
| |
| if (htab->elf.dynobj == NULL) |
| htab->elf.dynobj = abfd; |
| |
| dynobj = htab->elf.dynobj; |
| sreloc = bfd_get_section_by_name (dynobj, name); |
| if (sreloc == NULL) |
| { |
| flagword flags; |
| |
| sreloc = bfd_make_section (dynobj, name); |
| flags = (SEC_HAS_CONTENTS | SEC_READONLY |
| | SEC_IN_MEMORY | SEC_LINKER_CREATED); |
| if ((sec->flags & SEC_ALLOC) != 0) |
| flags |= SEC_ALLOC | SEC_LOAD; |
| if (sreloc == NULL |
| || ! bfd_set_section_flags (dynobj, sreloc, flags) |
| || ! bfd_set_section_alignment (dynobj, sreloc, 3)) |
| return FALSE; |
| } |
| elf_section_data (sec)->sreloc = sreloc; |
| } |
| |
| /* If this is a global symbol, we count the number of |
| relocations we need for this symbol. */ |
| if (h != NULL) |
| { |
| head = &((struct elf_s390_link_hash_entry *) h)->dyn_relocs; |
| } |
| else |
| { |
| /* Track dynamic relocs needed for local syms too. |
| We really need local syms available to do this |
| easily. Oh well. */ |
| |
| asection *s; |
| s = bfd_section_from_r_symndx (abfd, &htab->sym_sec, |
| sec, r_symndx); |
| if (s == NULL) |
| return FALSE; |
| |
| head = ((struct elf_s390_dyn_relocs **) |
| &elf_section_data (s)->local_dynrel); |
| } |
| |
| p = *head; |
| if (p == NULL || p->sec != sec) |
| { |
| bfd_size_type amt = sizeof *p; |
| p = ((struct elf_s390_dyn_relocs *) |
| bfd_alloc (htab->elf.dynobj, amt)); |
| if (p == NULL) |
| return FALSE; |
| p->next = *head; |
| *head = p; |
| p->sec = sec; |
| p->count = 0; |
| p->pc_count = 0; |
| } |
| |
| p->count += 1; |
| if (ELF64_R_TYPE (rel->r_info) == R_390_PC16 |
| || ELF64_R_TYPE (rel->r_info) == R_390_PC16DBL |
| || ELF64_R_TYPE (rel->r_info) == R_390_PC32 |
| || ELF64_R_TYPE (rel->r_info) == R_390_PC32DBL |
| || ELF64_R_TYPE (rel->r_info) == R_390_PC64) |
| p->pc_count += 1; |
| } |
| break; |
| |
| /* This relocation describes the C++ object vtable hierarchy. |
| Reconstruct it for later use during GC. */ |
| case R_390_GNU_VTINHERIT: |
| if (!_bfd_elf64_gc_record_vtinherit (abfd, sec, h, rel->r_offset)) |
| return FALSE; |
| break; |
| |
| /* This relocation describes which C++ vtable entries are actually |
| used. Record for later use during GC. */ |
| case R_390_GNU_VTENTRY: |
| if (!_bfd_elf64_gc_record_vtentry (abfd, sec, h, rel->r_addend)) |
| return FALSE; |
| break; |
| |
| default: |
| break; |
| } |
| } |
| |
| return TRUE; |
| } |
| |
| /* Return the section that should be marked against GC for a given |
| relocation. */ |
| |
| static asection * |
| elf_s390_gc_mark_hook (sec, info, rel, h, sym) |
| asection *sec; |
| struct bfd_link_info *info ATTRIBUTE_UNUSED; |
| Elf_Internal_Rela *rel; |
| struct elf_link_hash_entry *h; |
| Elf_Internal_Sym *sym; |
| { |
| if (h != NULL) |
| { |
| switch (ELF64_R_TYPE (rel->r_info)) |
| { |
| case R_390_GNU_VTINHERIT: |
| case R_390_GNU_VTENTRY: |
| break; |
| |
| default: |
| switch (h->root.type) |
| { |
| case bfd_link_hash_defined: |
| case bfd_link_hash_defweak: |
| return h->root.u.def.section; |
| |
| case bfd_link_hash_common: |
| return h->root.u.c.p->section; |
| |
| default: |
| break; |
| } |
| } |
| } |
| else |
| return bfd_section_from_elf_index (sec->owner, sym->st_shndx); |
| |
| return NULL; |
| } |
| |
| /* Update the got entry reference counts for the section being removed. */ |
| |
| static bfd_boolean |
| elf_s390_gc_sweep_hook (abfd, info, sec, relocs) |
| bfd *abfd; |
| struct bfd_link_info *info; |
| asection *sec; |
| const Elf_Internal_Rela *relocs; |
| { |
| Elf_Internal_Shdr *symtab_hdr; |
| struct elf_link_hash_entry **sym_hashes; |
| bfd_signed_vma *local_got_refcounts; |
| const Elf_Internal_Rela *rel, *relend; |
| |
| elf_section_data (sec)->local_dynrel = NULL; |
| |
| symtab_hdr = &elf_tdata (abfd)->symtab_hdr; |
| sym_hashes = elf_sym_hashes (abfd); |
| local_got_refcounts = elf_local_got_refcounts (abfd); |
| |
| relend = relocs + sec->reloc_count; |
| for (rel = relocs; rel < relend; rel++) |
| { |
| unsigned long r_symndx; |
| unsigned int r_type; |
| struct elf_link_hash_entry *h = NULL; |
| |
| r_symndx = ELF64_R_SYM (rel->r_info); |
| if (r_symndx >= symtab_hdr->sh_info) |
| { |
| struct elf_s390_link_hash_entry *eh; |
| struct elf_s390_dyn_relocs **pp; |
| struct elf_s390_dyn_relocs *p; |
| |
| h = sym_hashes[r_symndx - symtab_hdr->sh_info]; |
| eh = (struct elf_s390_link_hash_entry *) h; |
| |
| for (pp = &eh->dyn_relocs; (p = *pp) != NULL; pp = &p->next) |
| if (p->sec == sec) |
| { |
| /* Everything must go for SEC. */ |
| *pp = p->next; |
| break; |
| } |
| } |
| |
| r_type = ELF64_R_TYPE (rel->r_info); |
| r_type = elf_s390_tls_transition (info, r_type, h != NULL); |
| 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: |
| case R_390_GOT64: |
| case R_390_GOTOFF16: |
| case R_390_GOTOFF32: |
| case R_390_GOTOFF64: |
| case R_390_GOTPC: |
| case R_390_GOTPCDBL: |
| case R_390_GOTENT: |
| if (h != NULL) |
| { |
| if (h->got.refcount > 0) |
| h->got.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_8: |
| case R_390_12: |
| case R_390_16: |
| case R_390_32: |
| case R_390_64: |
| case R_390_PC16: |
| case R_390_PC16DBL: |
| case R_390_PC32: |
| case R_390_PC32DBL: |
| case R_390_PC64: |
| if (info->shared) |
| 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; |
| |
| default: |
| break; |
| } |
| } |
| |
| return TRUE; |
| } |
| |
| /* Make sure we emit a GOT entry if the symbol was supposed to have a PLT |
| entry but we found we will not create any. Called when we find we will |
| not have any PLT for this symbol, by for example |
| elf_s390_adjust_dynamic_symbol when we're doing a proper dynamic link, |
| or elf_s390_size_dynamic_sections if no dynamic sections will be |
| created (we're only linking static objects). */ |
| |
| static void |
| elf_s390_adjust_gotplt (h) |
| struct elf_s390_link_hash_entry *h; |
| { |
| if (h->elf.root.type == bfd_link_hash_warning) |
| h = (struct elf_s390_link_hash_entry *) h->elf.root.u.i.link; |
| |
| if (h->gotplt_refcount <= 0) |
| return; |
| |
| /* We simply add the number of gotplt references to the number |
| * of got references for this symbol. */ |
| h->elf.got.refcount += h->gotplt_refcount; |
| h->gotplt_refcount = -1; |
| } |
| |
| /* Adjust a symbol defined by a dynamic object and referenced by a |
| regular object. The current definition is in some section of the |
| dynamic object, but we're not including those sections. We have to |
| change the definition to something the rest of the link can |
| understand. */ |
| |
| static bfd_boolean |
| elf_s390_adjust_dynamic_symbol (info, h) |
| struct bfd_link_info *info; |
| struct elf_link_hash_entry *h; |
| { |
| struct elf_s390_link_hash_table *htab; |
| struct elf_s390_link_hash_entry * eh; |
| struct elf_s390_dyn_relocs *p; |
| asection *s; |
| unsigned int power_of_two; |
| |
| /* If this is a function, put it in the procedure linkage table. We |
| will fill in the contents of the procedure linkage table later |
| (although we could actually do it here). */ |
| if (h->type == STT_FUNC |
| || (h->elf_link_hash_flags & ELF_LINK_HASH_NEEDS_PLT) != 0) |
| { |
| if (h->plt.refcount <= 0 |
| || (! info->shared |
| && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC) == 0 |
| && (h->elf_link_hash_flags & ELF_LINK_HASH_REF_DYNAMIC) == 0 |
| && h->root.type != bfd_link_hash_undefweak |
| && h->root.type != bfd_link_hash_undefined)) |
| { |
| /* This case can occur if we saw a PLT32 reloc in an input |
| file, but the symbol was never referred to by a dynamic |
| object, or if all references were garbage collected. In |
| such a case, we don't actually need to build a procedure |
| linkage table, and we can just do a PC32 reloc instead. */ |
| h->plt.offset = (bfd_vma) -1; |
| h->elf_link_hash_flags &= ~ELF_LINK_HASH_NEEDS_PLT; |
| elf_s390_adjust_gotplt((struct elf_s390_link_hash_entry *) h); |
| } |
| |
| return TRUE; |
| } |
| else |
| /* It's possible that we incorrectly decided a .plt reloc was |
| needed for an R_390_PC32 reloc to a non-function sym in |
| check_relocs. We can't decide accurately between function and |
| non-function syms in check-relocs; Objects loaded later in |
| the link may change h->type. So fix it now. */ |
| h->plt.offset = (bfd_vma) -1; |
| |
| /* If this is a weak symbol, and there is a real definition, the |
| processor independent code will have arranged for us to see the |
| real definition first, and we can just use the same value. */ |
| if (h->weakdef != NULL) |
| { |
| BFD_ASSERT (h->weakdef->root.type == bfd_link_hash_defined |
| || h->weakdef->root.type == bfd_link_hash_defweak); |
| h->root.u.def.section = h->weakdef->root.u.def.section; |
| h->root.u.def.value = h->weakdef->root.u.def.value; |
| return TRUE; |
| } |
| |
| /* This is a reference to a symbol defined by a dynamic object which |
| is not a function. */ |
| |
| /* If we are creating a shared library, we must presume that the |
| only references to the symbol are via the global offset table. |
| For such cases we need not do anything here; the relocations will |
| be handled correctly by relocate_section. */ |
| if (info->shared) |
| return TRUE; |
| |
| /* If there are no references to this symbol that do not use the |
| GOT, we don't need to generate a copy reloc. */ |
| if ((h->elf_link_hash_flags & ELF_LINK_NON_GOT_REF) == 0) |
| return TRUE; |
| |
| /* If -z nocopyreloc was given, we won't generate them either. */ |
| if (info->nocopyreloc) |
| { |
| h->elf_link_hash_flags &= ~ELF_LINK_NON_GOT_REF; |
| return TRUE; |
| } |
| |
| eh = (struct elf_s390_link_hash_entry *) h; |
| for (p = eh->dyn_relocs; p != NULL; p = p->next) |
| { |
| s = p->sec->output_section; |
| if (s != NULL && (s->flags & SEC_READONLY) != 0) |
| break; |
| } |
| |
| /* If we didn't find any dynamic relocs in read-only sections, then |
| we'll be keeping the dynamic relocs and avoiding the copy reloc. */ |
| if (p == NULL) |
| { |
| h->elf_link_hash_flags &= ~ELF_LINK_NON_GOT_REF; |
| return TRUE; |
| } |
| |
| /* We must allocate the symbol in our .dynbss section, which will |
| become part of the .bss section of the executable. There will be |
| an entry for this symbol in the .dynsym section. The dynamic |
| object will contain position independent code, so all references |
| from the dynamic object to this symbol will go through the global |
| offset table. The dynamic linker will use the .dynsym entry to |
| determine the address it must put in the global offset table, so |
| both the dynamic object and the regular object will refer to the |
| same memory location for the variable. */ |
| |
| htab = elf_s390_hash_table (info); |
| |
| /* We must generate a R_390_COPY reloc to tell the dynamic linker to |
| copy the initial value out of the dynamic object and into the |
| runtime process image. */ |
| if ((h->root.u.def.section->flags & SEC_ALLOC) != 0) |
| { |
| htab->srelbss->_raw_size += sizeof (Elf64_External_Rela); |
| h->elf_link_hash_flags |= ELF_LINK_HASH_NEEDS_COPY; |
| } |
| |
| /* We need to figure out the alignment required for this symbol. I |
| have no idea how ELF linkers handle this. */ |
| power_of_two = bfd_log2 (h->size); |
| if (power_of_two > 3) |
| power_of_two = 3; |
| |
| /* Apply the required alignment. */ |
| s = htab->sdynbss; |
| s->_raw_size = BFD_ALIGN (s->_raw_size, (bfd_size_type) (1 << power_of_two)); |
| if (power_of_two > bfd_get_section_alignment (htab->elf.dynobj, s)) |
| { |
| if (! bfd_set_section_alignment (htab->elf.dynobj, s, power_of_two)) |
| return FALSE; |
| } |
| |
| /* Define the symbol as being at this point in the section. */ |
| h->root.u.def.section = s; |
| h->root.u.def.value = s->_raw_size; |
| |
| /* Increment the section size to make room for the symbol. */ |
| s->_raw_size += h->size; |
| |
| return TRUE; |
| } |
| |
| /* This is the condition under which elf_s390_finish_dynamic_symbol |
| will be called from elflink.h. If elflink.h doesn't call our |
| finish_dynamic_symbol routine, we'll need to do something about |
| initializing any .plt and .got entries in elf_s390_relocate_section. */ |
| #define WILL_CALL_FINISH_DYNAMIC_SYMBOL(DYN, INFO, H) \ |
| ((DYN) \ |
| && ((INFO)->shared \ |
| || ((H)->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) == 0) \ |
| && ((H)->dynindx != -1 \ |
| || ((H)->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) != 0)) |
| |
| /* Allocate space in .plt, .got and associated reloc sections for |
| dynamic relocs. */ |
| |
| static bfd_boolean |
| allocate_dynrelocs (h, inf) |
| struct elf_link_hash_entry *h; |
| PTR inf; |
| { |
| struct bfd_link_info *info; |
| struct elf_s390_link_hash_table *htab; |
| struct elf_s390_link_hash_entry *eh; |
| struct elf_s390_dyn_relocs *p; |
| |
| if (h->root.type == bfd_link_hash_indirect) |
| return TRUE; |
| |
| if (h->root.type == bfd_link_hash_warning) |
| /* When warning symbols are created, they **replace** the "real" |
| entry in the hash table, thus we never get to see the real |
| symbol in a hash traversal. So look at it now. */ |
| h = (struct elf_link_hash_entry *) h->root.u.i.link; |
| |
| info = (struct bfd_link_info *) inf; |
| htab = elf_s390_hash_table (info); |
| |
| if (htab->elf.dynamic_sections_created |
| && h->plt.refcount > 0) |
| { |
| /* Make sure this symbol is output as a dynamic symbol. |
| Undefined weak syms won't yet be marked as dynamic. */ |
| if (h->dynindx == -1 |
| && (h->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) == 0) |
| { |
| if (! bfd_elf64_link_record_dynamic_symbol (info, h)) |
| return FALSE; |
| } |
| |
| if (WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, info, h)) |
| { |
| asection *s = htab->splt; |
| |
| /* If this is the first .plt entry, make room for the special |
| first entry. */ |
| if (s->_raw_size == 0) |
| s->_raw_size += PLT_FIRST_ENTRY_SIZE; |
| |
| h->plt.offset = s->_raw_size; |
| |
| /* If this symbol is not defined in a regular file, and we are |
| not generating a shared library, then set the symbol to this |
| location in the .plt. This is required to make function |
| pointers compare as equal between the normal executable and |
| the shared library. */ |
| if (! info->shared |
| && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0) |
| { |
| h->root.u.def.section = s; |
| h->root.u.def.value = h->plt.offset; |
| } |
| |
| /* Make room for this entry. */ |
| s->_raw_size += PLT_ENTRY_SIZE; |
| |
| /* We also need to make an entry in the .got.plt section, which |
| will be placed in the .got section by the linker script. */ |
| htab->sgotplt->_raw_size += GOT_ENTRY_SIZE; |
| |
| /* We also need to make an entry in the .rela.plt section. */ |
| htab->srelplt->_raw_size += sizeof (Elf64_External_Rela); |
| } |
| else |
| { |
| h->plt.offset = (bfd_vma) -1; |
| h->elf_link_hash_flags &= ~ELF_LINK_HASH_NEEDS_PLT; |
| elf_s390_adjust_gotplt((struct elf_s390_link_hash_entry *) h); |
| } |
| } |
| else |
| { |
| h->plt.offset = (bfd_vma) -1; |
| h->elf_link_hash_flags &= ~ELF_LINK_HASH_NEEDS_PLT; |
| elf_s390_adjust_gotplt((struct elf_s390_link_hash_entry *) h); |
| } |
| |
| /* 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. */ |
| if (h->dynindx == -1 |
| && (h->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) == 0) |
| { |
| if (! bfd_elf64_link_record_dynamic_symbol (info, h)) |
| return FALSE; |
| } |
| |
| 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; |
| /* 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 |
| h->got.offset = (bfd_vma) -1; |
| |
| eh = (struct elf_s390_link_hash_entry *) h; |
| if (eh->dyn_relocs == NULL) |
| return TRUE; |
| |
| /* In the shared -Bsymbolic case, discard space allocated for |
| dynamic pc-relative relocs against symbols which turn out to be |
| defined in regular objects. For the normal shared case, discard |
| space for pc-relative relocs that have become local due to symbol |
| visibility changes. */ |
| |
| if (info->shared) |
| { |
| if ((h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) != 0 |
| && ((h->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) != 0 |
| || info->symbolic)) |
| { |
| struct elf_s390_dyn_relocs **pp; |
| |
| for (pp = &eh->dyn_relocs; (p = *pp) != NULL; ) |
| { |
| p->count -= p->pc_count; |
| p->pc_count = 0; |
| if (p->count == 0) |
| *pp = p->next; |
| else |
| pp = &p->next; |
| } |
| } |
| } |
| else |
| { |
| /* For the non-shared case, discard space for relocs against |
| symbols which turn out to need copy relocs or are not |
| dynamic. */ |
| |
| if ((h->elf_link_hash_flags & ELF_LINK_NON_GOT_REF) == 0 |
| && (((h->elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC) != 0 |
| && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0) |
| || (htab->elf.dynamic_sections_created |
| && (h->root.type == bfd_link_hash_undefweak |
| || h->root.type == bfd_link_hash_undefined)))) |
| { |
| /* Make sure this symbol is output as a dynamic symbol. |
| Undefined weak syms won't yet be marked as dynamic. */ |
| if (h->dynindx == -1 |
| && (h->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) == 0) |
| { |
| if (! bfd_elf64_link_record_dynamic_symbol (info, h)) |
| return FALSE; |
| } |
| |
| /* If that succeeded, we know we'll be keeping all the |
| relocs. */ |
| if (h->dynindx != -1) |
| goto keep; |
| } |
| |
| eh->dyn_relocs = NULL; |
| |
| keep: ; |
| } |
| |
| /* Finally, allocate space. */ |
| for (p = eh->dyn_relocs; p != NULL; p = p->next) |
| { |
| asection *sreloc = elf_section_data (p->sec)->sreloc; |
| sreloc->_raw_size += p->count * sizeof (Elf64_External_Rela); |
| } |
| |
| return TRUE; |
| } |
| |
| /* Find any dynamic relocs that apply to read-only sections. */ |
| |
| static bfd_boolean |
| readonly_dynrelocs (h, inf) |
| struct elf_link_hash_entry *h; |
| PTR inf; |
| { |
| struct elf_s390_link_hash_entry *eh; |
| struct elf_s390_dyn_relocs *p; |
| |
| if (h->root.type == bfd_link_hash_warning) |
| h = (struct elf_link_hash_entry *) h->root.u.i.link; |
| |
| eh = (struct elf_s390_link_hash_entry *) h; |
| for (p = eh->dyn_relocs; p != NULL; p = p->next) |
| { |
| asection *s = p->sec->output_section; |
| |
| if (s != NULL && (s->flags & SEC_READONLY) != 0) |
| { |
| struct bfd_link_info *info = (struct bfd_link_info *) inf; |
| |
| info->flags |= DF_TEXTREL; |
| |
| /* Not an error, just cut short the traversal. */ |
| return FALSE; |
| } |
| } |
| return TRUE; |
| } |
| |
| /* Set the sizes of the dynamic sections. */ |
| |
| static bfd_boolean |
| elf_s390_size_dynamic_sections (output_bfd, info) |
| bfd *output_bfd ATTRIBUTE_UNUSED; |
| struct bfd_link_info *info; |
| { |
| struct elf_s390_link_hash_table *htab; |
| bfd *dynobj; |
| asection *s; |
| bfd_boolean relocs; |
| bfd *ibfd; |
| |
| htab = elf_s390_hash_table (info); |
| dynobj = htab->elf.dynobj; |
| if (dynobj == NULL) |
| abort (); |
| |
| if (htab->elf.dynamic_sections_created) |
| { |
| /* Set the contents of the .interp section to the interpreter. */ |
| if (! info->shared) |
| { |
| s = bfd_get_section_by_name (dynobj, ".interp"); |
| if (s == NULL) |
| abort (); |
| s->_raw_size = sizeof ELF_DYNAMIC_INTERPRETER; |
| s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER; |
| } |
| } |
| |
| /* Set up .got offsets for local syms, and space for local dynamic |
| relocs. */ |
| for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next) |
| { |
| 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; |
| |
| if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour) |
| continue; |
| |
| for (s = ibfd->sections; s != NULL; s = s->next) |
| { |
| struct elf_s390_dyn_relocs *p; |
| |
| for (p = *((struct elf_s390_dyn_relocs **) |
| &elf_section_data (s)->local_dynrel); |
| p != NULL; |
| p = p->next) |
| { |
| if (!bfd_is_abs_section (p->sec) |
| && bfd_is_abs_section (p->sec->output_section)) |
| { |
| /* Input section has been discarded, either because |
| it is a copy of a linkonce section or due to |
| linker script /DISCARD/, so we'll be discarding |
| the relocs too. */ |
| } |
| else if (p->count != 0) |
| { |
| srela = elf_section_data (p->sec)->sreloc; |
| srela->_raw_size += p->count * sizeof (Elf64_External_Rela); |
| if ((p->sec->output_section->flags & SEC_READONLY) != 0) |
| info->flags |= DF_TEXTREL; |
| } |
| } |
| } |
| |
| local_got = elf_local_got_refcounts (ibfd); |
| if (!local_got) |
| continue; |
| |
| 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, ++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); |
| } |
| else |
| *local_got = (bfd_vma) -1; |
| } |
| } |
| |
| 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); |
| |
| /* We now have determined the sizes of the various dynamic sections. |
| Allocate memory for them. */ |
| relocs = FALSE; |
| for (s = dynobj->sections; s != NULL; s = s->next) |
| { |
| if ((s->flags & SEC_LINKER_CREATED) == 0) |
| continue; |
| |
| if (s == htab->splt |
| || s == htab->sgot |
| || s == htab->sgotplt) |
| { |
| /* Strip this section if we don't need it; see the |
| comment below. */ |
| } |
| else if (strncmp (bfd_get_section_name (dynobj, s), ".rela", 5) == 0) |
| { |
| if (s->_raw_size != 0 && s != htab->srelplt) |
| relocs = TRUE; |
| |
| /* We use the reloc_count field as a counter if we need |
| to copy relocs into the output file. */ |
| s->reloc_count = 0; |
| } |
| else |
| { |
| /* It's not one of our sections, so don't allocate space. */ |
| continue; |
| } |
| |
| if (s->_raw_size == 0) |
| { |
| /* If we don't need this section, strip it from the |
| output file. This is to handle .rela.bss and |
| .rela.plt. We must create it in |
| create_dynamic_sections, because it must be created |
| before the linker maps input sections to output |
| sections. The linker does that before |
| adjust_dynamic_symbol is called, and it is that |
| function which decides whether anything needs to go |
| into these sections. */ |
| |
| _bfd_strip_section_from_output (info, s); |
| continue; |
| } |
| |
| /* Allocate memory for the section contents. We use bfd_zalloc |
| here in case unused entries are not reclaimed before the |
| section's contents are written out. This should not happen, |
| but this way if it does, we get a R_390_NONE reloc instead |
| of garbage. */ |
| s->contents = (bfd_byte *) bfd_zalloc (dynobj, s->_raw_size); |
| if (s->contents == NULL) |
| return FALSE; |
| } |
| |
| if (htab->elf.dynamic_sections_created) |
| { |
| /* Add some entries to the .dynamic section. We fill in the |
| values later, in elf_s390_finish_dynamic_sections, but we |
| must add the entries now so that we get the correct size for |
| the .dynamic section. The DT_DEBUG entry is filled in by the |
| dynamic linker and used by the debugger. */ |
| #define add_dynamic_entry(TAG, VAL) \ |
| bfd_elf64_add_dynamic_entry (info, (bfd_vma) (TAG), (bfd_vma) (VAL)) |
| |
| if (! info->shared) |
| { |
| if (!add_dynamic_entry (DT_DEBUG, 0)) |
| return FALSE; |
| } |
| |
| if (htab->splt->_raw_size != 0) |
| { |
| if (!add_dynamic_entry (DT_PLTGOT, 0) |
| || !add_dynamic_entry (DT_PLTRELSZ, 0) |
| || !add_dynamic_entry (DT_PLTREL, DT_RELA) |
| || !add_dynamic_entry (DT_JMPREL, 0)) |
| return FALSE; |
| } |
| |
| if (relocs) |
| { |
| if (!add_dynamic_entry (DT_RELA, 0) |
| || !add_dynamic_entry (DT_RELASZ, 0) |
| || !add_dynamic_entry (DT_RELAENT, sizeof (Elf64_External_Rela))) |
| return FALSE; |
| |
| /* If any dynamic relocs apply to a read-only section, |
| then we need a DT_TEXTREL entry. */ |
| if ((info->flags & DF_TEXTREL) == 0) |
| elf_link_hash_traverse (&htab->elf, readonly_dynrelocs, |
| (PTR) info); |
| |
| if ((info->flags & DF_TEXTREL) != 0) |
| { |
| if (!add_dynamic_entry (DT_TEXTREL, 0)) |
| return FALSE; |
| } |
| } |
| } |
| #undef add_dynamic_entry |
| |
| 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 |
| elf_s390_relocate_section (output_bfd, info, input_bfd, input_section, |
| contents, relocs, local_syms, local_sections) |
| bfd *output_bfd; |
| struct bfd_link_info *info; |
| bfd *input_bfd; |
| asection *input_section; |
| bfd_byte *contents; |
| Elf_Internal_Rela *relocs; |
| Elf_Internal_Sym *local_syms; |
| asection **local_sections; |
| { |
| struct elf_s390_link_hash_table *htab; |
| Elf_Internal_Shdr *symtab_hdr; |
| struct elf_link_hash_entry **sym_hashes; |
| bfd_vma *local_got_offsets; |
| Elf_Internal_Rela *rel; |
| Elf_Internal_Rela *relend; |
| |
| if (info->relocateable) |
| return TRUE; |
| |
| htab = elf_s390_hash_table (info); |
| symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr; |
| sym_hashes = elf_sym_hashes (input_bfd); |
| local_got_offsets = elf_local_got_offsets (input_bfd); |
| |
| rel = relocs; |
| relend = relocs + input_section->reloc_count; |
| for (; rel < relend; rel++) |
| { |
| unsigned int r_type; |
| reloc_howto_type *howto; |
| unsigned long r_symndx; |
| struct elf_link_hash_entry *h; |
| Elf_Internal_Sym *sym; |
| asection *sec; |
| bfd_vma off; |
| 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 |
| || r_type == (int) R_390_GNU_VTENTRY) |
| continue; |
| if (r_type >= (int) R_390_max) |
| { |
| bfd_set_error (bfd_error_bad_value); |
| return FALSE; |
| } |
| |
| howto = elf_howto_table + r_type; |
| r_symndx = ELF64_R_SYM (rel->r_info); |
| |
| /* This is a final link. */ |
| h = NULL; |
| sym = NULL; |
| sec = NULL; |
| unresolved_reloc = FALSE; |
| if (r_symndx < symtab_hdr->sh_info) |
| { |
| sym = local_syms + r_symndx; |
| sec = local_sections[r_symndx]; |
| relocation = _bfd_elf_rela_local_sym (output_bfd, sym, sec, rel); |
| } |
| else |
| { |
| 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->root.type == bfd_link_hash_defined |
| || h->root.type == bfd_link_hash_defweak) |
| { |
| sec = h->root.u.def.section; |
| if (sec->output_section == NULL) |
| { |
| /* Set a flag that will be cleared later if we find a |
| relocation value for this symbol. output_section |
| is typically NULL for symbols satisfied by a shared |
| library. */ |
| unresolved_reloc = TRUE; |
| relocation = 0; |
| } |
| else |
| relocation = (h->root.u.def.value |
| + sec->output_section->vma |
| + sec->output_offset); |
| } |
| else if (h->root.type == bfd_link_hash_undefweak) |
| relocation = 0; |
| else if (info->shared |
| && !info->no_undefined |
| && ELF_ST_VISIBILITY (h->other) == STV_DEFAULT) |
| relocation = 0; |
| else |
| { |
| if (! ((*info->callbacks->undefined_symbol) |
| (info, h->root.root.string, input_bfd, |
| input_section, rel->r_offset, |
| (!info->shared || info->no_undefined |
| || ELF_ST_VISIBILITY (h->other))))) |
| return FALSE; |
| relocation = 0; |
| } |
| } |
| |
| switch (r_type) |
| { |
| case R_390_GOTPLT12: |
| case R_390_GOTPLT16: |
| case R_390_GOTPLT32: |
| case R_390_GOTPLT64: |
| case R_390_GOTPLTENT: |
| /* There are three cases for a GOTPLT relocation. 1) The |
| relocation is against the jump slot entry of a plt that |
| will get emitted to the output file. 2) The relocation |
| is against the jump slot of a plt entry that has been |
| removed. elf_s390_adjust_gotplt has created a GOT entry |
| as replacement. 3) The relocation is against a local symbol. |
| Cases 2) and 3) are the same as the GOT relocation code |
| so we just have to test for case 1 and fall through for |
| the other two. */ |
| if (h != NULL && h->plt.offset != (bfd_vma) -1) |
| { |
| bfd_vma plt_index; |
| |
| /* Calc. index no. |
| Current offset - size first entry / entry size. */ |
| plt_index = (h->plt.offset - PLT_FIRST_ENTRY_SIZE) / |
| PLT_ENTRY_SIZE; |
| |
| /* Offset in GOT is PLT index plus GOT headers(3) times 4, |
| addr & GOT addr. */ |
| relocation = (plt_index + 3) * GOT_ENTRY_SIZE; |
| unresolved_reloc = FALSE; |
| |
| if (r_type == R_390_GOTPLTENT) |
| relocation += htab->sgot->output_section->vma; |
| break; |
| } |
| /* Fall through. */ |
| |
| case R_390_GOT12: |
| case R_390_GOT16: |
| case R_390_GOT32: |
| case R_390_GOT64: |
| case R_390_GOTENT: |
| /* Relocation is to the entry for this symbol in the global |
| offset table. */ |
| if (htab->sgot == NULL) |
| abort (); |
| |
| if (h != NULL) |
| { |
| bfd_boolean dyn; |
| |
| off = h->got.offset; |
| dyn = htab->elf.dynamic_sections_created; |
| if (! WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info, h) |
| || (info->shared |
| && (info->symbolic |
| || h->dynindx == -1 |
| || (h->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL)) |
| && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR))) |
| { |
| /* This is actually a static link, or it is a |
| -Bsymbolic link and the symbol is defined |
| locally, or the symbol was forced to be local |
| because of a version file. We must initialize |
| this entry in the global offset table. Since the |
| offset must always be a multiple of 2, we use the |
| least significant bit to record whether we have |
| initialized it already. |
| |
| When doing a dynamic link, we create a .rel.got |
| relocation entry to initialize the value. This |
| is done in the finish_dynamic_symbol routine. */ |
| if ((off & 1) != 0) |
| off &= ~1; |
| else |
| { |
| bfd_put_64 (output_bfd, relocation, |
| htab->sgot->contents + off); |
| h->got.offset |= 1; |
| } |
| } |
| else |
| unresolved_reloc = FALSE; |
| } |
| else |
| { |
| if (local_got_offsets == NULL) |
| abort (); |
| |
| off = local_got_offsets[r_symndx]; |
| |
| /* The offset must always be a multiple of 8. We use |
| the least significant bit to record whether we have |
| already generated the necessary reloc. */ |
| if ((off & 1) != 0) |
| off &= ~1; |
| else |
| { |
| bfd_put_64 (output_bfd, relocation, |
| htab->sgot->contents + off); |
| |
| if (info->shared) |
| { |
| asection *s; |
| Elf_Internal_Rela outrel; |
| bfd_byte *loc; |
| |
| s = htab->srelgot; |
| if (s == NULL) |
| abort (); |
| |
| outrel.r_offset = (htab->sgot->output_section->vma |
| + htab->sgot->output_offset |
| + off); |
| outrel.r_info = ELF64_R_INFO (0, R_390_RELATIVE); |
| outrel.r_addend = relocation; |
| loc = s->contents; |
| loc += s->reloc_count++ * sizeof (Elf64_External_Rela); |
| bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc); |
| } |
| |
| local_got_offsets[r_symndx] |= 1; |
| } |
| } |
| |
| if (off >= (bfd_vma) -2) |
| abort (); |
| |
| relocation = htab->sgot->output_offset + off; |
| |
| /* For @GOTENT the relocation is against the offset between |
| the instruction and the symbols entry in the GOT and not |
| between the start of the GOT and the symbols entry. We |
| add the vma of the GOT to get the correct value. */ |
| if ( r_type == R_390_GOTENT |
| || r_type == R_390_GOTPLTENT) |
| relocation += htab->sgot->output_section->vma; |
| |
| break; |
| |
| case R_390_GOTOFF16: |
| case R_390_GOTOFF32: |
| case R_390_GOTOFF64: |
| /* Relocation is relative to the start of the global offset |
| table. */ |
| |
| /* Note that sgot->output_offset is not involved in this |
| calculation. We always want the start of .got. If we |
| defined _GLOBAL_OFFSET_TABLE in a different way, as is |
| permitted by the ABI, we might have to change this |
| calculation. */ |
| relocation -= htab->sgot->output_section->vma; |
| break; |
| |
| case R_390_GOTPC: |
| case R_390_GOTPCDBL: |
| /* Use global offset table as symbol value. */ |
| relocation = htab->sgot->output_section->vma; |
| unresolved_reloc = FALSE; |
| break; |
| |
| case R_390_PLT16DBL: |
| case R_390_PLT32: |
| case R_390_PLT32DBL: |
| case R_390_PLT64: |
| /* Relocation is to the entry for this symbol in the |
| procedure linkage table. */ |
| |
| /* Resolve a PLT32 reloc against a local symbol directly, |
| without using the procedure linkage table. */ |
| if (h == NULL) |
| break; |
| |
| if (h->plt.offset == (bfd_vma) -1 |
| || htab->splt == NULL) |
| { |
| /* We didn't make a PLT entry for this symbol. This |
| happens when statically linking PIC code, or when |
| using -Bsymbolic. */ |
| break; |
| } |
| |
| relocation = (htab->splt->output_section->vma |
| + htab->splt->output_offset |
| + h->plt.offset); |
| unresolved_reloc = FALSE; |
| break; |
| |
| case R_390_PLTOFF16: |
| case R_390_PLTOFF32: |
| case R_390_PLTOFF64: |
| /* Relocation is to the entry for this symbol in the |
| procedure linkage table relative to the start of the GOT. */ |
| |
| /* For local symbols or if we didn't make a PLT entry for |
| this symbol resolve the symbol directly. */ |
| if ( h == NULL |
| || h->plt.offset == (bfd_vma) -1 |
| || htab->splt == NULL) |
| { |
| relocation -= htab->sgot->output_section->vma; |
| break; |
| } |
| |
| relocation = (htab->splt->output_section->vma |
| + htab->splt->output_offset |
| + h->plt.offset |
| - htab->sgot->output_section->vma); |
| unresolved_reloc = FALSE; |
| break; |
| |
| case R_390_8: |
| case R_390_16: |
| case R_390_32: |
| case R_390_64: |
| case R_390_PC16: |
| case R_390_PC16DBL: |
| case R_390_PC32: |
| case R_390_PC32DBL: |
| case R_390_PC64: |
| /* r_symndx will be zero only for relocs against symbols |
| from removed linkonce sections, or sections discarded by |
| a linker script. */ |
| if (r_symndx == 0 |
| || (input_section->flags & SEC_ALLOC) == 0) |
| break; |
| |
| if ((info->shared |
| && ((r_type != R_390_PC16 |
| && r_type != R_390_PC16DBL |
| && r_type != R_390_PC32 |
| && r_type != R_390_PC32DBL |
| && r_type != R_390_PC64) |
| || (h != NULL |
| && h->dynindx != -1 |
| && (! info->symbolic |
| || (h->elf_link_hash_flags |
| & ELF_LINK_HASH_DEF_REGULAR) == 0)))) |
| || (!info->shared |
| && h != NULL |
| && h->dynindx != -1 |
| && (h->elf_link_hash_flags & ELF_LINK_NON_GOT_REF) == 0 |
| && (((h->elf_link_hash_flags |
| & ELF_LINK_HASH_DEF_DYNAMIC) != 0 |
| && (h->elf_link_hash_flags |
| & ELF_LINK_HASH_DEF_REGULAR) == 0) |
| || h->root.type == bfd_link_hash_undefweak |
| || h->root.type == bfd_link_hash_undefined))) |
| { |
| Elf_Internal_Rela outrel; |
| bfd_boolean skip, relocate; |
| asection *sreloc; |
| bfd_byte *loc; |
| |
| /* When generating a shared object, these relocations |
| are copied into the output file to be resolved at run |
| time. */ |
| skip = FALSE; |
| relocate = FALSE; |
| |
| outrel.r_offset = |
| _bfd_elf_section_offset (output_bfd, info, input_section, |
| rel->r_offset); |
| if (outrel.r_offset == (bfd_vma) -1) |
| skip = TRUE; |
| else if (outrel.r_offset == (bfd_vma) -2) |
| skip = TRUE, relocate = TRUE; |
| |
| outrel.r_offset += (input_section->output_section->vma |
| + input_section->output_offset); |
| |
| if (skip) |
| memset (&outrel, 0, sizeof outrel); |
| else if (h != NULL |
| && h->dynindx != -1 |
| && (r_type == R_390_PC16 |
| || r_type == R_390_PC16DBL |
| || r_type == R_390_PC32 |
| || r_type == R_390_PC32DBL |
| || r_type == R_390_PC64 |
| || !info->shared |
| || !info->symbolic |
| || (h->elf_link_hash_flags |
| & ELF_LINK_HASH_DEF_REGULAR) == 0)) |
| { |
| outrel.r_info = ELF64_R_INFO (h->dynindx, r_type); |
| outrel.r_addend = rel->r_addend; |
| } |
| else |
| { |
| /* This symbol is local, or marked to become local. */ |
| relocate = TRUE; |
| outrel.r_info = ELF64_R_INFO (0, R_390_RELATIVE); |
| outrel.r_addend = relocation + rel->r_addend; |
| } |
| |
| 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); |
| |
| /* If this reloc is against an external symbol, we do |
| not want to fiddle with the addend. Otherwise, we |
| need to include the symbol value so that it becomes |
| an addend for the dynamic reloc. */ |
| if (! relocate) |
| continue; |
| } |
| |
| 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; |
| } |
| |
| /* Dynamic relocs are not propagated for SEC_DEBUGGING sections |
| because such sections are not SEC_ALLOC and thus ld.so will |
| not process them. */ |
| if (unresolved_reloc |
| && !((input_section->flags & SEC_DEBUGGING) != 0 |
| && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC) != 0)) |
| (*_bfd_error_handler) |
| (_("%s(%s+0x%lx): unresolvable relocation against symbol `%s'"), |
| bfd_archive_filename (input_bfd), |
| bfd_get_section_name (input_bfd, input_section), |
| (long) rel->r_offset, |
| h->root.root.string); |
| |
| r = _bfd_final_link_relocate (howto, input_bfd, input_section, |
| contents, rel->r_offset, |
| relocation, rel->r_addend); |
| |
| if (r != bfd_reloc_ok) |
| { |
| const char *name; |
| |
| if (h != NULL) |
| name = h->root.root.string; |
| else |
| { |
| name = bfd_elf_string_from_elf_section (input_bfd, |
| symtab_hdr->sh_link, |
| sym->st_name); |
| if (name == NULL) |
| return FALSE; |
| if (*name == '\0') |
| name = bfd_section_name (input_bfd, sec); |
| } |
| |
| if (r == bfd_reloc_overflow) |
| { |
| |
| if (! ((*info->callbacks->reloc_overflow) |
| (info, name, howto->name, (bfd_vma) 0, |
| input_bfd, input_section, rel->r_offset))) |
| return FALSE; |
| } |
| else |
| { |
| (*_bfd_error_handler) |
| (_("%s(%s+0x%lx): reloc against `%s': error %d"), |
| bfd_archive_filename (input_bfd), |
| bfd_get_section_name (input_bfd, input_section), |
| (long) rel->r_offset, name, (int) r); |
| return FALSE; |
| } |
| } |
| } |
| |
| return TRUE; |
| } |
| |
| /* Finish up dynamic symbol handling. We set the contents of various |
| dynamic sections here. */ |
| |
| static bfd_boolean |
| elf_s390_finish_dynamic_symbol (output_bfd, info, h, sym) |
| bfd *output_bfd; |
| struct bfd_link_info *info; |
| struct elf_link_hash_entry *h; |
| Elf_Internal_Sym *sym; |
| { |
| struct elf_s390_link_hash_table *htab; |
| |
| htab = elf_s390_hash_table (info); |
| |
| if (h->plt.offset != (bfd_vma) -1) |
| { |
| bfd_vma plt_index; |
| bfd_vma got_offset; |
| Elf_Internal_Rela rela; |
| bfd_byte *loc; |
| |
| /* This symbol has an entry in the procedure linkage table. Set |
| it up. */ |
| |
| if (h->dynindx == -1 |
| || htab->splt == NULL |
| || htab->sgotplt == NULL |
| || htab->srelplt == NULL) |
| abort (); |
| |
| /* Calc. index no. |
| Current offset - size first entry / entry size. */ |
| plt_index = (h->plt.offset - PLT_FIRST_ENTRY_SIZE) / PLT_ENTRY_SIZE; |
| |
| /* Offset in GOT is PLT index plus GOT headers(3) times 8, |
| addr & GOT addr. */ |
| got_offset = (plt_index + 3) * GOT_ENTRY_SIZE; |
| |
| /* Fill in the blueprint of a PLT. */ |
| bfd_put_32 (output_bfd, (bfd_vma) PLT_ENTRY_WORD0, |
| htab->splt->contents + h->plt.offset); |
| bfd_put_32 (output_bfd, (bfd_vma) PLT_ENTRY_WORD1, |
| htab->splt->contents + h->plt.offset + 4); |
| bfd_put_32 (output_bfd, (bfd_vma) PLT_ENTRY_WORD2, |
| htab->splt->contents + h->plt.offset + 8); |
| bfd_put_32 (output_bfd, (bfd_vma) PLT_ENTRY_WORD3, |
| htab->splt->contents + h->plt.offset + 12); |
| bfd_put_32 (output_bfd, (bfd_vma) PLT_ENTRY_WORD4, |
| htab->splt->contents + h->plt.offset + 16); |
| bfd_put_32 (output_bfd, (bfd_vma) PLT_ENTRY_WORD5, |
| htab->splt->contents + h->plt.offset + 20); |
| bfd_put_32 (output_bfd, (bfd_vma) PLT_ENTRY_WORD6, |
| htab->splt->contents + h->plt.offset + 24); |
| bfd_put_32 (output_bfd, (bfd_vma) PLT_ENTRY_WORD7, |
| htab->splt->contents + h->plt.offset + 28); |
| /* Fixup the relative address to the GOT entry */ |
| bfd_put_32 (output_bfd, |
| (htab->sgotplt->output_section->vma + |
| htab->sgotplt->output_offset + got_offset |
| - (htab->splt->output_section->vma + h->plt.offset))/2, |
| htab->splt->contents + h->plt.offset + 2); |
| /* Fixup the relative branch to PLT 0 */ |
| bfd_put_32 (output_bfd, - (PLT_FIRST_ENTRY_SIZE + |
| (PLT_ENTRY_SIZE * plt_index) + 22)/2, |
| htab->splt->contents + h->plt.offset + 24); |
| /* Fixup offset into symbol table */ |
| bfd_put_32 (output_bfd, plt_index * sizeof (Elf64_External_Rela), |
| htab->splt->contents + h->plt.offset + 28); |
| |
| /* Fill in the entry in the global offset table. |
| Points to instruction after GOT offset. */ |
| bfd_put_64 (output_bfd, |
| (htab->splt->output_section->vma |
| + htab->splt->output_offset |
| + h->plt.offset |
| + 14), |
| htab->sgotplt->contents + got_offset); |
| |
| /* Fill in the entry in the .rela.plt section. */ |
| rela.r_offset = (htab->sgotplt->output_section->vma |
| + htab->sgotplt->output_offset |
| + got_offset); |
| rela.r_info = ELF64_R_INFO (h->dynindx, R_390_JMP_SLOT); |
| rela.r_addend = 0; |
| loc = htab->srelplt->contents + plt_index * sizeof (Elf64_External_Rela); |
| bfd_elf64_swap_reloca_out (output_bfd, &rela, loc); |
| |
| if ((h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0) |
| { |
| /* Mark the symbol as undefined, rather than as defined in |
| the .plt section. Leave the value alone. This is a clue |
| for the dynamic linker, to make function pointer |
| comparisons work between an application and shared |
| library. */ |
| sym->st_shndx = SHN_UNDEF; |
| } |
| } |
| |
| 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; |
| |
| /* This symbol has an entry in the global offset table. Set it |
| up. */ |
| if (htab->sgot == NULL || htab->srelgot == NULL) |
| abort (); |
| |
| rela.r_offset = (htab->sgot->output_section->vma |
| + htab->sgot->output_offset |
| + (h->got.offset &~ (bfd_vma) 1)); |
| |
| /* If this is a static link, or it is a -Bsymbolic link and the |
| symbol is defined locally or was forced to be local because |
| of a version file, we just want to emit a RELATIVE reloc. |
| The entry in the global offset table will already have been |
| initialized in the relocate_section function. */ |
| if (info->shared |
| && (info->symbolic |
| || h->dynindx == -1 |
| || (h->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL)) |
| && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR)) |
| { |
| BFD_ASSERT((h->got.offset & 1) != 0); |
| rela.r_info = ELF64_R_INFO (0, R_390_RELATIVE); |
| rela.r_addend = (h->root.u.def.value |
| + h->root.u.def.section->output_section->vma |
| + h->root.u.def.section->output_offset); |
| } |
| else |
| { |
| BFD_ASSERT((h->got.offset & 1) == 0); |
| bfd_put_64 (output_bfd, (bfd_vma) 0, htab->sgot->contents + h->got.offset); |
| rela.r_info = ELF64_R_INFO (h->dynindx, R_390_GLOB_DAT); |
| rela.r_addend = 0; |
| } |
| |
| loc = htab->srelgot->contents; |
| loc += htab->srelgot->reloc_count++ * sizeof (Elf64_External_Rela); |
| bfd_elf64_swap_reloca_out (output_bfd, &rela, loc); |
| } |
| |
| if ((h->elf_link_hash_flags & ELF_LINK_HASH_NEEDS_COPY) != 0) |
| { |
| Elf_Internal_Rela rela; |
| bfd_byte *loc; |
| |
| /* This symbols needs a copy reloc. Set it up. */ |
| |
| if (h->dynindx == -1 |
| || (h->root.type != bfd_link_hash_defined |
| && h->root.type != bfd_link_hash_defweak) |
| || htab->srelbss == NULL) |
| abort (); |
| |
| rela.r_offset = (h->root.u.def.value |
| + h->root.u.def.section->output_section->vma |
| + h->root.u.def.section->output_offset); |
| rela.r_info = ELF64_R_INFO (h->dynindx, R_390_COPY); |
| rela.r_addend = 0; |
| loc = htab->srelbss->contents; |
| loc += htab->srelbss->reloc_count++ * sizeof (Elf64_External_Rela); |
| bfd_elf64_swap_reloca_out (output_bfd, &rela, loc); |
| } |
| |
| /* Mark some specially defined symbols as absolute. */ |
| if (strcmp (h->root.root.string, "_DYNAMIC") == 0 |
| || strcmp (h->root.root.string, "_GLOBAL_OFFSET_TABLE_") == 0 |
| || strcmp (h->root.root.string, "_PROCEDURE_LINKAGE_TABLE_") == 0) |
| sym->st_shndx = SHN_ABS; |
| |
| return TRUE; |
| } |
| |
| /* Used to decide how to sort relocs in an optimal manner for the |
| dynamic linker, before writing them out. */ |
| |
| static enum elf_reloc_type_class |
| elf_s390_reloc_type_class (rela) |
| const Elf_Internal_Rela *rela; |
| { |
| switch ((int) ELF64_R_TYPE (rela->r_info)) |
| { |
| case R_390_RELATIVE: |
| return reloc_class_relative; |
| case R_390_JMP_SLOT: |
| return reloc_class_plt; |
| case R_390_COPY: |
| return reloc_class_copy; |
| default: |
| return reloc_class_normal; |
| } |
| } |
| |
| /* Finish up the dynamic sections. */ |
| |
| static bfd_boolean |
| elf_s390_finish_dynamic_sections (output_bfd, info) |
| bfd *output_bfd; |
| struct bfd_link_info *info; |
| { |
| struct elf_s390_link_hash_table *htab; |
| bfd *dynobj; |
| asection *sdyn; |
| |
| htab = elf_s390_hash_table (info); |
| dynobj = htab->elf.dynobj; |
| sdyn = bfd_get_section_by_name (dynobj, ".dynamic"); |
| |
| if (htab->elf.dynamic_sections_created) |
| { |
| Elf64_External_Dyn *dyncon, *dynconend; |
| |
| if (sdyn == NULL || htab->sgot == NULL) |
| abort (); |
| |
| dyncon = (Elf64_External_Dyn *) sdyn->contents; |
| dynconend = (Elf64_External_Dyn *) (sdyn->contents + sdyn->_raw_size); |
| for (; dyncon < dynconend; dyncon++) |
| { |
| Elf_Internal_Dyn dyn; |
| asection *s; |
| |
| bfd_elf64_swap_dyn_in (dynobj, dyncon, &dyn); |
| |
| switch (dyn.d_tag) |
| { |
| default: |
| continue; |
| |
| case DT_PLTGOT: |
| dyn.d_un.d_ptr = htab->sgot->output_section->vma; |
| break; |
| |
| case DT_JMPREL: |
| dyn.d_un.d_ptr = htab->srelplt->output_section->vma; |
| break; |
| |
| case DT_PLTRELSZ: |
| s = htab->srelplt->output_section; |
| if (s->_cooked_size != 0) |
| dyn.d_un.d_val = s->_cooked_size; |
| else |
| dyn.d_un.d_val = s->_raw_size; |
| break; |
| |
| case DT_RELASZ: |
| /* The procedure linkage table relocs (DT_JMPREL) should |
| not be included in the overall relocs (DT_RELA). |
| Therefore, we override the DT_RELASZ entry here to |
| make it not include the JMPREL relocs. Since the |
| linker script arranges for .rela.plt to follow all |
| other relocation sections, we don't have to worry |
| about changing the DT_RELA entry. */ |
| s = htab->srelplt->output_section; |
| if (s->_cooked_size != 0) |
| dyn.d_un.d_val -= s->_cooked_size; |
| else |
| dyn.d_un.d_val -= s->_raw_size; |
| break; |
| } |
| |
| bfd_elf64_swap_dyn_out (output_bfd, &dyn, dyncon); |
| } |
| |
| /* Fill in the special first entry in the procedure linkage table. */ |
| if (htab->splt && htab->splt->_raw_size > 0) |
| { |
| /* fill in blueprint for plt 0 entry */ |
| bfd_put_32 (output_bfd, (bfd_vma) PLT_FIRST_ENTRY_WORD0, |
| htab->splt->contents ); |
| bfd_put_32 (output_bfd, (bfd_vma) PLT_FIRST_ENTRY_WORD1, |
| htab->splt->contents +4 ); |
| bfd_put_32 (output_bfd, (bfd_vma) PLT_FIRST_ENTRY_WORD3, |
| htab->splt->contents +12 ); |
| bfd_put_32 (output_bfd, (bfd_vma) PLT_FIRST_ENTRY_WORD4, |
| htab->splt->contents +16 ); |
| bfd_put_32 (output_bfd, (bfd_vma) PLT_FIRST_ENTRY_WORD5, |
| htab->splt->contents +20 ); |
| bfd_put_32 (output_bfd, (bfd_vma) PLT_FIRST_ENTRY_WORD6, |
| htab->splt->contents + 24); |
| bfd_put_32 (output_bfd, (bfd_vma) PLT_FIRST_ENTRY_WORD7, |
| htab->splt->contents + 28 ); |
| /* Fixup relative address to start of GOT */ |
| bfd_put_32 (output_bfd, |
| (htab->sgotplt->output_section->vma + |
| htab->sgotplt->output_offset |
| - htab->splt->output_section->vma - 6)/2, |
| htab->splt->contents + 8); |
| } |
| elf_section_data (htab->splt->output_section) |
| ->this_hdr.sh_entsize = PLT_ENTRY_SIZE; |
| } |
| |
| if (htab->sgotplt) |
| { |
| /* Fill in the first three entries in the global offset table. */ |
| if (htab->sgotplt->_raw_size > 0) |
| { |
| bfd_put_64 (output_bfd, |
| (sdyn == NULL ? (bfd_vma) 0 |
| : sdyn->output_section->vma + sdyn->output_offset), |
| htab->sgotplt->contents); |
| /* One entry for shared object struct ptr. */ |
| bfd_put_64 (output_bfd, (bfd_vma) 0, htab->sgotplt->contents + 8); |
| /* One entry for _dl_runtime_resolve. */ |
| bfd_put_64 (output_bfd, (bfd_vma) 0, htab->sgotplt->contents + 12); |
| } |
| |
| elf_section_data (htab->sgot->output_section) |
| ->this_hdr.sh_entsize = 8; |
| } |
| return TRUE; |
| } |
| |
| /* Why was the hash table entry size definition changed from |
| ARCH_SIZE/8 to 4? This breaks the 64 bit dynamic linker and |
| this is the only reason for the s390_elf64_size_info structure. */ |
| |
| const struct elf_size_info s390_elf64_size_info = |
| { |
| sizeof (Elf64_External_Ehdr), |
| sizeof (Elf64_External_Phdr), |
| sizeof (Elf64_External_Shdr), |
| sizeof (Elf64_External_Rel), |
| sizeof (Elf64_External_Rela), |
| sizeof (Elf64_External_Sym), |
| sizeof (Elf64_External_Dyn), |
| sizeof (Elf_External_Note), |
| 8, /* hash-table entry size. */ |
| 1, /* internal relocations per external relocations. */ |
| 64, /* arch_size. */ |
| 8, /* file_align. */ |
| ELFCLASS64, EV_CURRENT, |
| bfd_elf64_write_out_phdrs, |
| bfd_elf64_write_shdrs_and_ehdr, |
| bfd_elf64_write_relocs, |
| bfd_elf64_swap_symbol_in, |
| bfd_elf64_swap_symbol_out, |
| bfd_elf64_slurp_reloc_table, |
| bfd_elf64_slurp_symbol_table, |
| bfd_elf64_swap_dyn_in, |
| bfd_elf64_swap_dyn_out, |
| bfd_elf64_swap_reloc_in, |
| bfd_elf64_swap_reloc_out, |
| bfd_elf64_swap_reloca_in, |
| bfd_elf64_swap_reloca_out |
| }; |
| |
| #define TARGET_BIG_SYM bfd_elf64_s390_vec |
| #define TARGET_BIG_NAME "elf64-s390" |
| #define ELF_ARCH bfd_arch_s390 |
| #define ELF_MACHINE_CODE EM_S390 |
| #define ELF_MACHINE_ALT1 EM_S390_OLD |
| #define ELF_MAXPAGESIZE 0x1000 |
| |
| #define elf_backend_size_info s390_elf64_size_info |
| |
| #define elf_backend_can_gc_sections 1 |
| #define elf_backend_can_refcount 1 |
| #define elf_backend_want_got_plt 1 |
| #define elf_backend_plt_readonly 1 |
| #define elf_backend_want_plt_sym 0 |
| #define elf_backend_got_header_size 24 |
| #define elf_backend_plt_header_size PLT_ENTRY_SIZE |
| #define elf_backend_rela_normal 1 |
| |
| #define elf_info_to_howto elf_s390_info_to_howto |
| |
| #define bfd_elf64_bfd_is_local_label_name elf_s390_is_local_label_name |
| #define bfd_elf64_bfd_link_hash_table_create elf_s390_link_hash_table_create |
| #define bfd_elf64_bfd_reloc_type_lookup elf_s390_reloc_type_lookup |
| |
| #define elf_backend_adjust_dynamic_symbol elf_s390_adjust_dynamic_symbol |
| #define elf_backend_check_relocs elf_s390_check_relocs |
| #define elf_backend_copy_indirect_symbol elf_s390_copy_indirect_symbol |
| #define elf_backend_create_dynamic_sections elf_s390_create_dynamic_sections |
| #define elf_backend_finish_dynamic_sections elf_s390_finish_dynamic_sections |
| #define elf_backend_finish_dynamic_symbol elf_s390_finish_dynamic_symbol |
| #define elf_backend_gc_mark_hook elf_s390_gc_mark_hook |
| #define elf_backend_gc_sweep_hook elf_s390_gc_sweep_hook |
| #define elf_backend_reloc_type_class elf_s390_reloc_type_class |
| #define elf_backend_relocate_section elf_s390_relocate_section |
| #define elf_backend_size_dynamic_sections elf_s390_size_dynamic_sections |
| #define elf_backend_reloc_type_class elf_s390_reloc_type_class |
| |
| #define bfd_elf64_mkobject elf_s390_mkobject |
| #define elf_backend_object_p elf_s390_object_p |
| |
| #include "elf64-target.h" |