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3d4d4302b9
* elf32-arm.c: When retrieving SEC_LINKER_CREATED sections, use the above throughout rather than bfd_get_section_by_name. Use bfd_make_section_anyway rather than bfd_make_section when creating them. * elf32-bfin.c: Likewise. * elf32-cr16.c: Likewise. * elf32-cris.c: Likewise. * elf32-frv.c: Likewise. * elf32-hppa.c: Likewise. * elf32-i370.c: Likewise. * elf32-i386.c: Likewise. * elf32-lm32.c: Likewise. * elf32-m32c.c: Likewise. * elf32-m32r.c: Likewise. * elf32-m68k.c: Likewise. * elf32-microblaze.c: Likewise. * elf32-ppc.c: Likewise. * elf32-rl78.c: Likewise. * elf32-s390.c: Likewise. * elf32-score.c: Likewise. * elf32-score7.c: Likewise. * elf32-sh.c: Likewise. * elf32-tic6x.c: Likewise. * elf32-tilepro.c: Likewise. * elf32-vax.c: Likewise. * elf32-xstormy16.c: Likewise. * elf32-xtensa.c: Likewise. * elf64-alpha.c: Likewise. * elf64-hppa.c: Likewise. * elf64-ia64-vms.c: Likewise. * elf64-ppc.c: Likewise. * elf64-s390.c: Likewise. * elf64-sh64.c: Likewise. * elf64-sparc.c: Likewise. * elf64-x86-64.c: Likewise. * elfnn-ia64.c: Likewise. * elfxx-mips.c: Likewise. * elfxx-sparc.c: Likewise. * elfxx-tilegx.c: Likewise. * elflink.c: Likewise. * elf-vxworks.c: Likewise. * elf-m10300.c: Likewise. Also make use of htab plt, got and gotplt shortcuts. * bfd-in2.h: Regenerate. * elf32-lm32.c (lm32_elf_check_relocs): Use the correct bfd when calling create_rofixup_section. * elflink.c (bfd_elf_final_link): Simplify test for .dynstr.
3541 lines
108 KiB
C
3541 lines
108 KiB
C
/* IBM S/390-specific support for 32-bit ELF
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Copyright 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009,
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2011, 2012 Free Software Foundation, Inc.
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Contributed by Carl B. Pedersen and Martin Schwidefsky.
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This file is part of BFD, the Binary File Descriptor library.
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, MA
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02110-1301, USA. */
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#include "sysdep.h"
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#include "bfd.h"
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#include "bfdlink.h"
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#include "libbfd.h"
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#include "elf-bfd.h"
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static reloc_howto_type *elf_s390_reloc_type_lookup
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PARAMS ((bfd *, bfd_reloc_code_real_type));
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static void elf_s390_info_to_howto
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PARAMS ((bfd *, arelent *, Elf_Internal_Rela *));
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static bfd_boolean elf_s390_is_local_label_name
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PARAMS ((bfd *, const char *));
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static struct bfd_hash_entry *link_hash_newfunc
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PARAMS ((struct bfd_hash_entry *, struct bfd_hash_table *, const char *));
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static struct bfd_link_hash_table *elf_s390_link_hash_table_create
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PARAMS ((bfd *));
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static bfd_boolean create_got_section
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PARAMS((bfd *, struct bfd_link_info *));
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static bfd_boolean elf_s390_create_dynamic_sections
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PARAMS((bfd *, struct bfd_link_info *));
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static void elf_s390_copy_indirect_symbol
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PARAMS ((struct bfd_link_info *, struct elf_link_hash_entry *,
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struct elf_link_hash_entry *));
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static bfd_boolean elf_s390_check_relocs
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PARAMS ((bfd *, struct bfd_link_info *, asection *,
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const Elf_Internal_Rela *));
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struct elf_s390_link_hash_entry;
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static void elf_s390_adjust_gotplt
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PARAMS ((struct elf_s390_link_hash_entry *));
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static bfd_boolean elf_s390_adjust_dynamic_symbol
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PARAMS ((struct bfd_link_info *, struct elf_link_hash_entry *));
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static bfd_boolean allocate_dynrelocs
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PARAMS ((struct elf_link_hash_entry *, PTR));
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static bfd_boolean readonly_dynrelocs
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PARAMS ((struct elf_link_hash_entry *, PTR));
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static bfd_boolean elf_s390_size_dynamic_sections
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PARAMS ((bfd *, struct bfd_link_info *));
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static bfd_boolean elf_s390_relocate_section
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PARAMS ((bfd *, struct bfd_link_info *, bfd *, asection *, bfd_byte *,
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Elf_Internal_Rela *, Elf_Internal_Sym *, asection **));
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static bfd_boolean elf_s390_finish_dynamic_symbol
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PARAMS ((bfd *, struct bfd_link_info *, struct elf_link_hash_entry *,
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Elf_Internal_Sym *));
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static enum elf_reloc_type_class elf_s390_reloc_type_class
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PARAMS ((const Elf_Internal_Rela *));
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static bfd_boolean elf_s390_finish_dynamic_sections
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PARAMS ((bfd *, struct bfd_link_info *));
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static bfd_boolean elf_s390_object_p
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PARAMS ((bfd *));
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static bfd_boolean elf_s390_grok_prstatus
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PARAMS ((bfd *, Elf_Internal_Note *));
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static int elf_s390_tls_transition
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PARAMS ((struct bfd_link_info *, int, int));
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static bfd_reloc_status_type s390_tls_reloc
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PARAMS ((bfd *, arelent *, asymbol *, PTR, asection *, bfd *, char **));
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static bfd_vma dtpoff_base
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PARAMS ((struct bfd_link_info *));
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static bfd_vma tpoff
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PARAMS ((struct bfd_link_info *, bfd_vma));
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static void invalid_tls_insn
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PARAMS ((bfd *, asection *, Elf_Internal_Rela *));
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static bfd_reloc_status_type s390_elf_ldisp_reloc
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PARAMS ((bfd *, arelent *, asymbol *, PTR, asection *, bfd *, char **));
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#include "elf/s390.h"
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/* The relocation "howto" table. */
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static reloc_howto_type elf_howto_table[] =
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{
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HOWTO (R_390_NONE, /* type */
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0, /* rightshift */
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0, /* size (0 = byte, 1 = short, 2 = long) */
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0, /* bitsize */
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FALSE, /* pc_relative */
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0, /* bitpos */
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complain_overflow_dont, /* complain_on_overflow */
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bfd_elf_generic_reloc, /* special_function */
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"R_390_NONE", /* name */
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FALSE, /* partial_inplace */
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0, /* src_mask */
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0, /* dst_mask */
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FALSE), /* pcrel_offset */
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HOWTO(R_390_8, 0, 0, 8, FALSE, 0, complain_overflow_bitfield,
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bfd_elf_generic_reloc, "R_390_8", FALSE, 0,0x000000ff, FALSE),
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HOWTO(R_390_12, 0, 1, 12, FALSE, 0, complain_overflow_dont,
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bfd_elf_generic_reloc, "R_390_12", FALSE, 0,0x00000fff, FALSE),
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HOWTO(R_390_16, 0, 1, 16, FALSE, 0, complain_overflow_bitfield,
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bfd_elf_generic_reloc, "R_390_16", FALSE, 0,0x0000ffff, FALSE),
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HOWTO(R_390_32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
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bfd_elf_generic_reloc, "R_390_32", FALSE, 0,0xffffffff, FALSE),
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HOWTO(R_390_PC32, 0, 2, 32, TRUE, 0, complain_overflow_bitfield,
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bfd_elf_generic_reloc, "R_390_PC32", FALSE, 0,0xffffffff, TRUE),
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HOWTO(R_390_GOT12, 0, 1, 12, FALSE, 0, complain_overflow_bitfield,
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bfd_elf_generic_reloc, "R_390_GOT12", FALSE, 0,0x00000fff, FALSE),
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HOWTO(R_390_GOT32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
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bfd_elf_generic_reloc, "R_390_GOT32", FALSE, 0,0xffffffff, FALSE),
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HOWTO(R_390_PLT32, 0, 2, 32, TRUE, 0, complain_overflow_bitfield,
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bfd_elf_generic_reloc, "R_390_PLT32", FALSE, 0,0xffffffff, TRUE),
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HOWTO(R_390_COPY, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
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bfd_elf_generic_reloc, "R_390_COPY", FALSE, 0,0xffffffff, FALSE),
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HOWTO(R_390_GLOB_DAT, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
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bfd_elf_generic_reloc, "R_390_GLOB_DAT", FALSE, 0,0xffffffff, FALSE),
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HOWTO(R_390_JMP_SLOT, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
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bfd_elf_generic_reloc, "R_390_JMP_SLOT", FALSE, 0,0xffffffff, FALSE),
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HOWTO(R_390_RELATIVE, 0, 2, 32, TRUE, 0, complain_overflow_bitfield,
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bfd_elf_generic_reloc, "R_390_RELATIVE", FALSE, 0,0xffffffff, FALSE),
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HOWTO(R_390_GOTOFF32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
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bfd_elf_generic_reloc, "R_390_GOTOFF32", FALSE, 0,0xffffffff, FALSE),
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HOWTO(R_390_GOTPC, 0, 2, 32, TRUE, 0, complain_overflow_bitfield,
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bfd_elf_generic_reloc, "R_390_GOTPC", FALSE, 0,0xffffffff, TRUE),
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HOWTO(R_390_GOT16, 0, 1, 16, FALSE, 0, complain_overflow_bitfield,
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bfd_elf_generic_reloc, "R_390_GOT16", FALSE, 0,0x0000ffff, FALSE),
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HOWTO(R_390_PC16, 0, 1, 16, TRUE, 0, complain_overflow_bitfield,
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bfd_elf_generic_reloc, "R_390_PC16", FALSE, 0,0x0000ffff, TRUE),
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HOWTO(R_390_PC16DBL, 1, 1, 16, TRUE, 0, complain_overflow_bitfield,
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bfd_elf_generic_reloc, "R_390_PC16DBL", FALSE, 0,0x0000ffff, TRUE),
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HOWTO(R_390_PLT16DBL, 1, 1, 16, TRUE, 0, complain_overflow_bitfield,
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bfd_elf_generic_reloc, "R_390_PLT16DBL", FALSE, 0,0x0000ffff, TRUE),
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HOWTO(R_390_PC32DBL, 1, 2, 32, TRUE, 0, complain_overflow_bitfield,
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bfd_elf_generic_reloc, "R_390_PC32DBL", FALSE, 0,0xffffffff, TRUE),
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HOWTO(R_390_PLT32DBL, 1, 2, 32, TRUE, 0, complain_overflow_bitfield,
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bfd_elf_generic_reloc, "R_390_PLT32DBL", FALSE, 0,0xffffffff, TRUE),
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HOWTO(R_390_GOTPCDBL, 1, 2, 32, TRUE, 0, complain_overflow_bitfield,
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bfd_elf_generic_reloc, "R_390_GOTPCDBL", FALSE, 0,0xffffffff, TRUE),
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EMPTY_HOWTO (R_390_64), /* Empty entry for R_390_64. */
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EMPTY_HOWTO (R_390_PC64), /* Empty entry for R_390_PC64. */
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EMPTY_HOWTO (R_390_GOT64), /* Empty entry for R_390_GOT64. */
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EMPTY_HOWTO (R_390_PLT64), /* Empty entry for R_390_PLT64. */
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HOWTO(R_390_GOTENT, 1, 2, 32, TRUE, 0, complain_overflow_bitfield,
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bfd_elf_generic_reloc, "R_390_GOTENT", FALSE, 0,0xffffffff, TRUE),
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HOWTO(R_390_GOTOFF16, 0, 1, 16, FALSE, 0, complain_overflow_bitfield,
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bfd_elf_generic_reloc, "R_390_GOTOFF16", FALSE, 0,0x0000ffff, FALSE),
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EMPTY_HOWTO (R_390_GOTOFF64), /* Empty entry for R_390_GOTOFF64. */
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HOWTO(R_390_GOTPLT12, 0, 1, 12, FALSE, 0, complain_overflow_dont,
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bfd_elf_generic_reloc, "R_390_GOTPLT12", FALSE, 0,0x00000fff, FALSE),
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HOWTO(R_390_GOTPLT16, 0, 1, 16, FALSE, 0, complain_overflow_bitfield,
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bfd_elf_generic_reloc, "R_390_GOTPLT16", FALSE, 0,0x0000ffff, FALSE),
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HOWTO(R_390_GOTPLT32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
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bfd_elf_generic_reloc, "R_390_GOTPLT32", FALSE, 0,0xffffffff, FALSE),
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EMPTY_HOWTO (R_390_GOTPLT64), /* Empty entry for R_390_GOTPLT64. */
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HOWTO(R_390_GOTPLTENT, 1, 2, 32, TRUE, 0, complain_overflow_bitfield,
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bfd_elf_generic_reloc, "R_390_GOTPLTENT",FALSE, 0,0xffffffff, TRUE),
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HOWTO(R_390_PLTOFF16, 0, 1, 16, FALSE, 0, complain_overflow_bitfield,
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bfd_elf_generic_reloc, "R_390_PLTOFF16", FALSE, 0,0x0000ffff, FALSE),
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HOWTO(R_390_PLTOFF32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
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bfd_elf_generic_reloc, "R_390_PLTOFF32", FALSE, 0,0xffffffff, FALSE),
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EMPTY_HOWTO (R_390_PLTOFF64), /* Empty entry for R_390_PLTOFF64. */
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HOWTO(R_390_TLS_LOAD, 0, 0, 0, FALSE, 0, complain_overflow_dont,
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s390_tls_reloc, "R_390_TLS_LOAD", FALSE, 0, 0, FALSE),
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HOWTO(R_390_TLS_GDCALL, 0, 0, 0, FALSE, 0, complain_overflow_dont,
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s390_tls_reloc, "R_390_TLS_GDCALL", FALSE, 0, 0, FALSE),
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HOWTO(R_390_TLS_LDCALL, 0, 0, 0, FALSE, 0, complain_overflow_dont,
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s390_tls_reloc, "R_390_TLS_LDCALL", FALSE, 0, 0, FALSE),
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HOWTO(R_390_TLS_GD32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
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bfd_elf_generic_reloc, "R_390_TLS_GD32", FALSE, 0, 0xffffffff, FALSE),
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EMPTY_HOWTO (R_390_TLS_GD64), /* Empty entry for R_390_TLS_GD64. */
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HOWTO(R_390_TLS_GOTIE12, 0, 1, 12, FALSE, 0, complain_overflow_dont,
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bfd_elf_generic_reloc, "R_390_TLS_GOTIE12", FALSE, 0, 0x00000fff, FALSE),
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HOWTO(R_390_TLS_GOTIE32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
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bfd_elf_generic_reloc, "R_390_TLS_GOTIE32", FALSE, 0, 0xffffffff, FALSE),
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EMPTY_HOWTO (R_390_TLS_GOTIE64), /* Empty entry for R_390_TLS_GOTIE64. */
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HOWTO(R_390_TLS_LDM32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
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bfd_elf_generic_reloc, "R_390_TLS_LDM32", FALSE, 0, 0xffffffff, FALSE),
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EMPTY_HOWTO (R_390_TLS_LDM64), /* Empty entry for R_390_TLS_LDM64. */
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HOWTO(R_390_TLS_IE32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
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bfd_elf_generic_reloc, "R_390_TLS_IE32", FALSE, 0, 0xffffffff, FALSE),
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EMPTY_HOWTO (R_390_TLS_IE64), /* Empty entry for R_390_TLS_IE64. */
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HOWTO(R_390_TLS_IEENT, 1, 2, 32, TRUE, 0, complain_overflow_bitfield,
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bfd_elf_generic_reloc, "R_390_TLS_IEENT", FALSE, 0, 0xffffffff, TRUE),
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HOWTO(R_390_TLS_LE32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
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bfd_elf_generic_reloc, "R_390_TLS_LE32", FALSE, 0, 0xffffffff, FALSE),
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EMPTY_HOWTO (R_390_TLS_LE64), /* Empty entry for R_390_TLS_LE64. */
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HOWTO(R_390_TLS_LDO32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
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bfd_elf_generic_reloc, "R_390_TLS_LDO32", FALSE, 0, 0xffffffff, FALSE),
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EMPTY_HOWTO (R_390_TLS_LDO64), /* Empty entry for R_390_TLS_LDO64. */
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HOWTO(R_390_TLS_DTPMOD, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
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bfd_elf_generic_reloc, "R_390_TLS_DTPMOD", FALSE, 0, 0xffffffff, FALSE),
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HOWTO(R_390_TLS_DTPOFF, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
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bfd_elf_generic_reloc, "R_390_TLS_DTPOFF", FALSE, 0, 0xffffffff, FALSE),
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HOWTO(R_390_TLS_TPOFF, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
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bfd_elf_generic_reloc, "R_390_TLS_TPOFF", FALSE, 0, 0xffffffff, FALSE),
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HOWTO(R_390_20, 0, 2, 20, FALSE, 8, complain_overflow_dont,
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s390_elf_ldisp_reloc, "R_390_20", FALSE, 0,0x0fffff00, FALSE),
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HOWTO(R_390_GOT20, 0, 2, 20, FALSE, 8, complain_overflow_dont,
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s390_elf_ldisp_reloc, "R_390_GOT20", FALSE, 0,0x0fffff00, FALSE),
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HOWTO(R_390_GOTPLT20, 0, 2, 20, FALSE, 8, complain_overflow_dont,
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s390_elf_ldisp_reloc, "R_390_GOTPLT20", FALSE, 0,0x0fffff00, FALSE),
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HOWTO(R_390_TLS_GOTIE20, 0, 2, 20, FALSE, 8, complain_overflow_dont,
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s390_elf_ldisp_reloc, "R_390_TLS_GOTIE20", FALSE, 0,0x0fffff00, FALSE),
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};
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/* GNU extension to record C++ vtable hierarchy. */
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static reloc_howto_type elf32_s390_vtinherit_howto =
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HOWTO (R_390_GNU_VTINHERIT, 0,2,0,FALSE,0,complain_overflow_dont, NULL, "R_390_GNU_VTINHERIT", FALSE,0, 0, FALSE);
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static reloc_howto_type elf32_s390_vtentry_howto =
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HOWTO (R_390_GNU_VTENTRY, 0,2,0,FALSE,0,complain_overflow_dont, _bfd_elf_rel_vtable_reloc_fn,"R_390_GNU_VTENTRY", FALSE,0,0, FALSE);
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static reloc_howto_type *
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elf_s390_reloc_type_lookup (abfd, code)
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bfd *abfd ATTRIBUTE_UNUSED;
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bfd_reloc_code_real_type code;
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{
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switch (code)
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{
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case BFD_RELOC_NONE:
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return &elf_howto_table[(int) R_390_NONE];
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case BFD_RELOC_8:
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return &elf_howto_table[(int) R_390_8];
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case BFD_RELOC_390_12:
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return &elf_howto_table[(int) R_390_12];
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case BFD_RELOC_16:
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return &elf_howto_table[(int) R_390_16];
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case BFD_RELOC_32:
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return &elf_howto_table[(int) R_390_32];
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case BFD_RELOC_CTOR:
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return &elf_howto_table[(int) R_390_32];
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case BFD_RELOC_32_PCREL:
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return &elf_howto_table[(int) R_390_PC32];
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case BFD_RELOC_390_GOT12:
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return &elf_howto_table[(int) R_390_GOT12];
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case BFD_RELOC_32_GOT_PCREL:
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return &elf_howto_table[(int) R_390_GOT32];
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case BFD_RELOC_390_PLT32:
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return &elf_howto_table[(int) R_390_PLT32];
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case BFD_RELOC_390_COPY:
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return &elf_howto_table[(int) R_390_COPY];
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case BFD_RELOC_390_GLOB_DAT:
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return &elf_howto_table[(int) R_390_GLOB_DAT];
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case BFD_RELOC_390_JMP_SLOT:
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return &elf_howto_table[(int) R_390_JMP_SLOT];
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case BFD_RELOC_390_RELATIVE:
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return &elf_howto_table[(int) R_390_RELATIVE];
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case BFD_RELOC_32_GOTOFF:
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return &elf_howto_table[(int) R_390_GOTOFF32];
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case BFD_RELOC_390_GOTPC:
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return &elf_howto_table[(int) R_390_GOTPC];
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case BFD_RELOC_390_GOT16:
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return &elf_howto_table[(int) R_390_GOT16];
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case BFD_RELOC_16_PCREL:
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return &elf_howto_table[(int) R_390_PC16];
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case BFD_RELOC_390_PC16DBL:
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return &elf_howto_table[(int) R_390_PC16DBL];
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case BFD_RELOC_390_PLT16DBL:
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return &elf_howto_table[(int) R_390_PLT16DBL];
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case BFD_RELOC_390_PC32DBL:
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return &elf_howto_table[(int) R_390_PC32DBL];
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case BFD_RELOC_390_PLT32DBL:
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return &elf_howto_table[(int) R_390_PLT32DBL];
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case BFD_RELOC_390_GOTPCDBL:
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return &elf_howto_table[(int) R_390_GOTPCDBL];
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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_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_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_TLS_LOAD:
|
|
return &elf_howto_table[(int) R_390_TLS_LOAD];
|
|
case BFD_RELOC_390_TLS_GDCALL:
|
|
return &elf_howto_table[(int) R_390_TLS_GDCALL];
|
|
case BFD_RELOC_390_TLS_LDCALL:
|
|
return &elf_howto_table[(int) R_390_TLS_LDCALL];
|
|
case BFD_RELOC_390_TLS_GD32:
|
|
return &elf_howto_table[(int) R_390_TLS_GD32];
|
|
case BFD_RELOC_390_TLS_GOTIE12:
|
|
return &elf_howto_table[(int) R_390_TLS_GOTIE12];
|
|
case BFD_RELOC_390_TLS_GOTIE32:
|
|
return &elf_howto_table[(int) R_390_TLS_GOTIE32];
|
|
case BFD_RELOC_390_TLS_LDM32:
|
|
return &elf_howto_table[(int) R_390_TLS_LDM32];
|
|
case BFD_RELOC_390_TLS_IE32:
|
|
return &elf_howto_table[(int) R_390_TLS_IE32];
|
|
case BFD_RELOC_390_TLS_IEENT:
|
|
return &elf_howto_table[(int) R_390_TLS_IEENT];
|
|
case BFD_RELOC_390_TLS_LE32:
|
|
return &elf_howto_table[(int) R_390_TLS_LE32];
|
|
case BFD_RELOC_390_TLS_LDO32:
|
|
return &elf_howto_table[(int) R_390_TLS_LDO32];
|
|
case BFD_RELOC_390_TLS_DTPMOD:
|
|
return &elf_howto_table[(int) R_390_TLS_DTPMOD];
|
|
case BFD_RELOC_390_TLS_DTPOFF:
|
|
return &elf_howto_table[(int) R_390_TLS_DTPOFF];
|
|
case BFD_RELOC_390_TLS_TPOFF:
|
|
return &elf_howto_table[(int) R_390_TLS_TPOFF];
|
|
case BFD_RELOC_390_20:
|
|
return &elf_howto_table[(int) R_390_20];
|
|
case BFD_RELOC_390_GOT20:
|
|
return &elf_howto_table[(int) R_390_GOT20];
|
|
case BFD_RELOC_390_GOTPLT20:
|
|
return &elf_howto_table[(int) R_390_GOTPLT20];
|
|
case BFD_RELOC_390_TLS_GOTIE20:
|
|
return &elf_howto_table[(int) R_390_TLS_GOTIE20];
|
|
case BFD_RELOC_VTABLE_INHERIT:
|
|
return &elf32_s390_vtinherit_howto;
|
|
case BFD_RELOC_VTABLE_ENTRY:
|
|
return &elf32_s390_vtentry_howto;
|
|
default:
|
|
break;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static reloc_howto_type *
|
|
elf_s390_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED,
|
|
const char *r_name)
|
|
{
|
|
unsigned int i;
|
|
|
|
for (i = 0; i < sizeof (elf_howto_table) / sizeof (elf_howto_table[0]); i++)
|
|
if (elf_howto_table[i].name != NULL
|
|
&& strcasecmp (elf_howto_table[i].name, r_name) == 0)
|
|
return &elf_howto_table[i];
|
|
|
|
if (strcasecmp (elf32_s390_vtinherit_howto.name, r_name) == 0)
|
|
return &elf32_s390_vtinherit_howto;
|
|
if (strcasecmp (elf32_s390_vtentry_howto.name, r_name) == 0)
|
|
return &elf32_s390_vtentry_howto;
|
|
|
|
return NULL;
|
|
}
|
|
|
|
/* We need to use ELF32_R_TYPE so we have our own copy of this function,
|
|
and elf32-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;
|
|
{
|
|
unsigned int r_type = ELF32_R_TYPE(dst->r_info);
|
|
switch (r_type)
|
|
{
|
|
case R_390_GNU_VTINHERIT:
|
|
cache_ptr->howto = &elf32_s390_vtinherit_howto;
|
|
break;
|
|
|
|
case R_390_GNU_VTENTRY:
|
|
cache_ptr->howto = &elf32_s390_vtentry_howto;
|
|
break;
|
|
|
|
default:
|
|
if (r_type >= sizeof (elf_howto_table) / sizeof (elf_howto_table[0]))
|
|
{
|
|
(*_bfd_error_handler) (_("%B: invalid relocation type %d"),
|
|
abfd, (int) r_type);
|
|
r_type = R_390_NONE;
|
|
}
|
|
cache_ptr->howto = &elf_howto_table[r_type];
|
|
}
|
|
}
|
|
|
|
/* 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;
|
|
}
|
|
|
|
/* Handle the large displacement relocs. */
|
|
static bfd_reloc_status_type
|
|
s390_elf_ldisp_reloc (abfd, reloc_entry, symbol, data, input_section,
|
|
output_bfd, error_message)
|
|
bfd *abfd ATTRIBUTE_UNUSED;
|
|
arelent *reloc_entry;
|
|
asymbol *symbol;
|
|
PTR data ATTRIBUTE_UNUSED;
|
|
asection *input_section;
|
|
bfd *output_bfd;
|
|
char **error_message ATTRIBUTE_UNUSED;
|
|
{
|
|
reloc_howto_type *howto = reloc_entry->howto;
|
|
bfd_vma relocation;
|
|
bfd_vma insn;
|
|
|
|
if (output_bfd != (bfd *) NULL
|
|
&& (symbol->flags & BSF_SECTION_SYM) == 0
|
|
&& (! howto->partial_inplace
|
|
|| reloc_entry->addend == 0))
|
|
{
|
|
reloc_entry->address += input_section->output_offset;
|
|
return bfd_reloc_ok;
|
|
}
|
|
|
|
if (output_bfd != NULL)
|
|
return bfd_reloc_continue;
|
|
|
|
if (reloc_entry->address > bfd_get_section_limit (abfd, input_section))
|
|
return bfd_reloc_outofrange;
|
|
|
|
relocation = (symbol->value
|
|
+ symbol->section->output_section->vma
|
|
+ symbol->section->output_offset);
|
|
relocation += reloc_entry->addend;
|
|
if (howto->pc_relative)
|
|
{
|
|
relocation -= (input_section->output_section->vma
|
|
+ input_section->output_offset);
|
|
relocation -= reloc_entry->address;
|
|
}
|
|
|
|
insn = bfd_get_32 (abfd, (bfd_byte *) data + reloc_entry->address);
|
|
insn |= (relocation & 0xfff) << 16 | (relocation & 0xff000) >> 4;
|
|
bfd_put_32 (abfd, insn, (bfd_byte *) data + reloc_entry->address);
|
|
|
|
if ((bfd_signed_vma) relocation < - 0x80000
|
|
|| (bfd_signed_vma) relocation > 0x7ffff)
|
|
return bfd_reloc_overflow;
|
|
else
|
|
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 "/lib/ld.so.1"
|
|
|
|
/* If ELIMINATE_COPY_RELOCS is non-zero, the linker will try to avoid
|
|
copying dynamic variables from a shared lib into an app's dynbss
|
|
section, and instead use a dynamic relocation to point into the
|
|
shared lib. */
|
|
#define ELIMINATE_COPY_RELOCS 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 4
|
|
|
|
/* 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 2 GB 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 position independent PLT entries looks like this:
|
|
|
|
r12 holds addr of the current GOT at entry to the PLT
|
|
|
|
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 into rela.plt
|
|
|
|
The loader must then find the module where the function is
|
|
and insert the address in the GOT.
|
|
|
|
Note: 390 can only address +- 64 K relative.
|
|
We check if offset > 65536, then make a relative branch -64xxx
|
|
back to a previous defined branch
|
|
|
|
PLT1: BASR 1,0 # 2 bytes
|
|
L 1,22(1) # 4 bytes Load offset in GOT in r 1
|
|
L 1,(1,12) # 4 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
|
|
L 1,14(1) # 4 bytes Load offset in symol table in r1
|
|
BRC 15,-x # 4 bytes Jump to start of PLT
|
|
.word 0 # 2 bytes filler
|
|
.long ? # 4 bytes offset in GOT
|
|
.long ? # 4 bytes offset into rela.plt
|
|
|
|
This was the general case. There are two additional, optimizes PLT
|
|
definitions. One for GOT offsets < 4096 and one for GOT offsets < 32768.
|
|
First the one for GOT offsets < 4096:
|
|
|
|
PLT1: L 1,<offset>(12) # 4 bytes Load address from GOT in R1
|
|
BCR 15,1 # 2 bytes Jump to address
|
|
.word 0,0,0 # 6 bytes filler
|
|
RET1: BASR 1,0 # 2 bytes Return from GOT 1st time
|
|
L 1,14(1) # 4 bytes Load offset in rela.plt in r1
|
|
BRC 15,-x # 4 bytes Jump to start of PLT
|
|
.word 0,0,0 # 6 bytes filler
|
|
.long ? # 4 bytes offset into rela.plt
|
|
|
|
Second the one for GOT offsets < 32768:
|
|
|
|
PLT1: LHI 1,<offset> # 4 bytes Load offset in GOT to r1
|
|
L 1,(1,12) # 4 bytes Load address from GOT to r1
|
|
BCR 15,1 # 2 bytes Jump to address
|
|
.word 0 # 2 bytes filler
|
|
RET1: BASR 1,0 # 2 bytes Return from GOT 1st time
|
|
L 1,14(1) # 4 bytes Load offset in rela.plt in r1
|
|
BRC 15,-x # 4 bytes Jump to start of PLT
|
|
.word 0,0,0 # 6 bytes filler
|
|
.long ? # 4 bytes offset into rela.plt
|
|
|
|
Total = 32 bytes per PLT entry
|
|
|
|
The code for static build PLT entries looks like this:
|
|
|
|
PLT1: BASR 1,0 # 2 bytes
|
|
L 1,22(1) # 4 bytes Load address of GOT entry
|
|
L 1,0(0,1) # 4 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
|
|
L 1,14(1) # 4 bytes Load offset in symbol table in r1
|
|
BRC 15,-x # 4 bytes Jump to start of PLT
|
|
.word 0 # 2 bytes filler
|
|
.long ? # 4 bytes address of GOT entry
|
|
.long ? # 4 bytes offset into rela.plt */
|
|
|
|
static const bfd_byte elf_s390_plt_entry[PLT_ENTRY_SIZE] =
|
|
{
|
|
0x0d, 0x10, /* basr %r1,%r0 */
|
|
0x58, 0x10, 0x10, 0x16, /* l %r1,22(%r1) */
|
|
0x58, 0x10, 0x10, 0x00, /* l %r1,0(%r1) */
|
|
0x07, 0xf1, /* br %r1 */
|
|
0x0d, 0x10, /* basr %r1,%r0 */
|
|
0x58, 0x10, 0x10, 0x0e, /* l %r1,14(%r1) */
|
|
0xa7, 0xf4, 0x00, 0x00, /* j first plt */
|
|
0x00, 0x00, /* padding */
|
|
0x00, 0x00, 0x00, 0x00, /* GOT offset */
|
|
0x00, 0x00, 0x00, 0x00 /* rela.plt offset */
|
|
};
|
|
|
|
/* Generic PLT pic entry. */
|
|
static const bfd_byte elf_s390_plt_pic_entry[PLT_ENTRY_SIZE] =
|
|
{
|
|
0x0d, 0x10, /* basr %r1,%r0 */
|
|
0x58, 0x10, 0x10, 0x16, /* l %r1,22(%r1) */
|
|
0x58, 0x11, 0xc0, 0x00, /* l %r1,0(%r1,%r12) */
|
|
0x07, 0xf1, /* br %r1 */
|
|
0x0d, 0x10, /* basr %r1,%r0 */
|
|
0x58, 0x10, 0x10, 0x0e, /* l %r1,14(%r1) */
|
|
0xa7, 0xf4, 0x00, 0x00, /* j first plt */
|
|
0x00, 0x00, /* padding */
|
|
0x00, 0x00, 0x00, 0x00, /* GOT offset */
|
|
0x00, 0x00, 0x00, 0x00 /* rela.plt offset */
|
|
};
|
|
|
|
/* Optimized PLT pic entry for GOT offset < 4k. xx will be replaced
|
|
when generating the PLT slot with the GOT offset. */
|
|
static const bfd_byte elf_s390_plt_pic12_entry[PLT_ENTRY_SIZE] =
|
|
{
|
|
0x58, 0x10, 0xc0, 0x00, /* l %r1,xx(%r12) */
|
|
0x07, 0xf1, /* br %r1 */
|
|
0x00, 0x00, 0x00, 0x00, /* padding */
|
|
0x00, 0x00,
|
|
0x0d, 0x10, /* basr %r1,%r0 */
|
|
0x58, 0x10, 0x10, 0x0e, /* l %r1,14(%r1) */
|
|
0xa7, 0xf4, 0x00, 0x00, /* j first plt */
|
|
0x00, 0x00, 0x00, 0x00,
|
|
0x00, 0x00, 0x00, 0x00
|
|
};
|
|
|
|
/* Optimized PLT pic entry for GOT offset < 32k. xx will be replaced
|
|
when generating the PLT slot with the GOT offset. */
|
|
static const bfd_byte elf_s390_plt_pic16_entry[PLT_ENTRY_SIZE] =
|
|
{
|
|
0xa7, 0x18, 0x00, 0x00, /* lhi %r1,xx */
|
|
0x58, 0x11, 0xc0, 0x00, /* l %r1,0(%r1,%r12) */
|
|
0x07, 0xf1, /* br %r1 */
|
|
0x00, 0x00,
|
|
0x0d, 0x10, /* basr %r1,%r0 */
|
|
0x58, 0x10, 0x10, 0x0e, /* l %r1,14(%r1) */
|
|
0xa7, 0xf4, 0x00, 0x00, /* j first plt */
|
|
0x00, 0x00, 0x00, 0x00,
|
|
0x00, 0x00, 0x00, 0x00,
|
|
0x00, 0x00
|
|
};
|
|
|
|
/* The first PLT entry pushes the offset into the rela.plt
|
|
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 for PIC code:
|
|
|
|
PLT0:
|
|
ST 1,28(15) # R1 has offset into rela.plt
|
|
L 1,4(12) # Get loader ino(object struct address)
|
|
ST 1,24(15) # Store address
|
|
L 1,8(12) # Entry address of loader in R1
|
|
BR 1 # Jump to loader
|
|
|
|
The first entry in the PLT for static code:
|
|
|
|
PLT0:
|
|
ST 1,28(15) # R1 has offset into rela.plt
|
|
BASR 1,0
|
|
L 1,18(0,1) # Get address of GOT
|
|
MVC 24(4,15),4(1) # Move loader ino to stack
|
|
L 1,8(1) # Get address of loader
|
|
BR 1 # Jump to loader
|
|
.word 0 # filler
|
|
.long got # address of GOT */
|
|
|
|
static const bfd_byte elf_s390_plt_first_entry[PLT_FIRST_ENTRY_SIZE] =
|
|
{
|
|
0x50, 0x10, 0xf0, 0x1c, /* st %r1,28(%r15) */
|
|
0x0d, 0x10, /* basr %r1,%r0 */
|
|
0x58, 0x10, 0x10, 0x12, /* l %r1,18(%r1) */
|
|
0xd2, 0x03, 0xf0, 0x18, 0x10, 0x04, /* mvc 24(4,%r15),4(%r1) */
|
|
0x58, 0x10, 0x10, 0x08, /* l %r1,8(%r1) */
|
|
0x07, 0xf1, /* br %r1 */
|
|
0x00, 0x00, 0x00, 0x00,
|
|
0x00, 0x00, 0x00, 0x00,
|
|
0x00, 0x00
|
|
};
|
|
|
|
static const bfd_byte elf_s390_plt_pic_first_entry[PLT_FIRST_ENTRY_SIZE] =
|
|
{
|
|
0x50, 0x10, 0xf0, 0x1c, /* st %r1,28(%r15) */
|
|
0x58, 0x10, 0xc0, 0x04, /* l %r1,4(%r12) */
|
|
0x50, 0x10, 0xf0, 0x18, /* st %r1,24(%r15) */
|
|
0x58, 0x10, 0xc0, 0x08, /* l %r1,8(%r12) */
|
|
0x07, 0xf1, /* br %r1 */
|
|
0x00, 0x00, 0x00, 0x00,
|
|
0x00, 0x00, 0x00, 0x00,
|
|
0x00, 0x00, 0x00, 0x00,
|
|
0x00, 0x00
|
|
};
|
|
|
|
|
|
/* 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_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 4
|
|
unsigned char tls_type;
|
|
};
|
|
|
|
#define elf_s390_hash_entry(ent) \
|
|
((struct elf_s390_link_hash_entry *)(ent))
|
|
|
|
/* NOTE: Keep this structure in sync with
|
|
the one declared in elf64-s390.c. */
|
|
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)
|
|
|
|
#define is_s390_elf(bfd) \
|
|
(bfd_get_flavour (bfd) == bfd_target_elf_flavour \
|
|
&& elf_tdata (bfd) != NULL \
|
|
&& elf_object_id (bfd) == S390_ELF_DATA)
|
|
|
|
static bfd_boolean
|
|
elf_s390_mkobject (bfd *abfd)
|
|
{
|
|
return bfd_elf_allocate_object (abfd, sizeof (struct elf_s390_obj_tdata),
|
|
S390_ELF_DATA);
|
|
}
|
|
|
|
static bfd_boolean
|
|
elf_s390_object_p (abfd)
|
|
bfd *abfd;
|
|
{
|
|
/* Set the right machine number for an s390 elf32 file. */
|
|
return bfd_default_set_arch_mach (abfd, bfd_arch_s390, bfd_mach_s390_31);
|
|
}
|
|
|
|
/* s390 ELF linker hash table. */
|
|
|
|
struct elf_s390_link_hash_table
|
|
{
|
|
struct elf_link_hash_table elf;
|
|
|
|
/* Short-cuts to get to dynamic linker sections. */
|
|
asection *sdynbss;
|
|
asection *srelbss;
|
|
|
|
union {
|
|
bfd_signed_vma refcount;
|
|
bfd_vma offset;
|
|
} tls_ldm_got;
|
|
|
|
/* Small local sym cache. */
|
|
struct sym_cache sym_cache;
|
|
};
|
|
|
|
/* Get the s390 ELF linker hash table from a link_info structure. */
|
|
|
|
#define elf_s390_hash_table(p) \
|
|
(elf_hash_table_id ((struct elf_link_hash_table *) ((p)->hash)) \
|
|
== S390_ELF_DATA ? ((struct elf_s390_link_hash_table *) ((p)->hash)) : NULL)
|
|
|
|
/* 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,
|
|
sizeof (struct elf_s390_link_hash_entry),
|
|
S390_ELF_DATA))
|
|
{
|
|
free (ret);
|
|
return NULL;
|
|
}
|
|
|
|
ret->elf.sgot = NULL;
|
|
ret->elf.sgotplt = NULL;
|
|
ret->elf.srelgot = NULL;
|
|
ret->elf.splt = NULL;
|
|
ret->elf.srelplt = NULL;
|
|
ret->sdynbss = NULL;
|
|
ret->srelbss = NULL;
|
|
ret->tls_ldm_got.refcount = 0;
|
|
ret->sym_cache.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->elf.sgot = bfd_get_linker_section (dynobj, ".got");
|
|
htab->elf.sgotplt = bfd_get_linker_section (dynobj, ".got.plt");
|
|
htab->elf.srelgot = bfd_get_linker_section (dynobj, ".rela.got");
|
|
if (!htab->elf.sgot || !htab->elf.sgotplt || !htab->elf.srelgot)
|
|
abort ();
|
|
|
|
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->elf.sgot && !create_got_section (dynobj, info))
|
|
return FALSE;
|
|
|
|
if (!_bfd_elf_create_dynamic_sections (dynobj, info))
|
|
return FALSE;
|
|
|
|
htab->elf.splt = bfd_get_linker_section (dynobj, ".plt");
|
|
htab->elf.srelplt = bfd_get_linker_section (dynobj, ".rela.plt");
|
|
htab->sdynbss = bfd_get_linker_section (dynobj, ".dynbss");
|
|
if (!info->shared)
|
|
htab->srelbss = bfd_get_linker_section (dynobj, ".rela.bss");
|
|
|
|
if (!htab->elf.splt || !htab->elf.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 (info, dir, ind)
|
|
struct bfd_link_info *info;
|
|
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_dyn_relocs **pp;
|
|
struct elf_dyn_relocs *p;
|
|
|
|
/* Add reloc counts against the indirect sym to the direct sym
|
|
list. Merge any entries against the same section. */
|
|
for (pp = &eind->dyn_relocs; (p = *pp) != NULL; )
|
|
{
|
|
struct elf_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;
|
|
}
|
|
|
|
if (ELIMINATE_COPY_RELOCS
|
|
&& ind->root.type != bfd_link_hash_indirect
|
|
&& dir->dynamic_adjusted)
|
|
{
|
|
/* If called to transfer flags for a weakdef during processing
|
|
of elf_adjust_dynamic_symbol, don't copy non_got_ref.
|
|
We clear it ourselves for ELIMINATE_COPY_RELOCS. */
|
|
dir->ref_dynamic |= ind->ref_dynamic;
|
|
dir->ref_regular |= ind->ref_regular;
|
|
dir->ref_regular_nonweak |= ind->ref_regular_nonweak;
|
|
dir->needs_plt |= ind->needs_plt;
|
|
}
|
|
else
|
|
_bfd_elf_link_hash_copy_indirect (info, dir, ind);
|
|
}
|
|
|
|
static int
|
|
elf_s390_tls_transition (info, r_type, is_local)
|
|
struct bfd_link_info *info;
|
|
int r_type;
|
|
int is_local;
|
|
{
|
|
if (info->shared)
|
|
return r_type;
|
|
|
|
switch (r_type)
|
|
{
|
|
case R_390_TLS_GD32:
|
|
case R_390_TLS_IE32:
|
|
if (is_local)
|
|
return R_390_TLS_LE32;
|
|
return R_390_TLS_IE32;
|
|
case R_390_TLS_GOTIE32:
|
|
if (is_local)
|
|
return R_390_TLS_LE32;
|
|
return R_390_TLS_GOTIE32;
|
|
case R_390_TLS_LDM32:
|
|
return R_390_TLS_LE32;
|
|
}
|
|
|
|
return r_type;
|
|
}
|
|
|
|
/* Look through the relocs for a section during the first phase, and
|
|
allocate space in the global offset table or procedure linkage
|
|
table. */
|
|
|
|
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->relocatable)
|
|
return TRUE;
|
|
|
|
BFD_ASSERT (is_s390_elf (abfd));
|
|
|
|
htab = elf_s390_hash_table (info);
|
|
symtab_hdr = &elf_symtab_hdr (abfd);
|
|
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 = ELF32_R_SYM (rel->r_info);
|
|
|
|
if (r_symndx >= NUM_SHDR_ENTRIES (symtab_hdr))
|
|
{
|
|
(*_bfd_error_handler) (_("%B: bad symbol index: %d"),
|
|
abfd, r_symndx);
|
|
return FALSE;
|
|
}
|
|
|
|
if (r_symndx < symtab_hdr->sh_info)
|
|
h = NULL;
|
|
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;
|
|
}
|
|
|
|
/* Create got section and local_got_refcounts array if they
|
|
are needed. */
|
|
r_type = elf_s390_tls_transition (info,
|
|
ELF32_R_TYPE (rel->r_info),
|
|
h == NULL);
|
|
switch (r_type)
|
|
{
|
|
case R_390_GOT12:
|
|
case R_390_GOT16:
|
|
case R_390_GOT20:
|
|
case R_390_GOT32:
|
|
case R_390_GOTENT:
|
|
case R_390_GOTPLT12:
|
|
case R_390_GOTPLT16:
|
|
case R_390_GOTPLT20:
|
|
case R_390_GOTPLT32:
|
|
case R_390_GOTPLTENT:
|
|
case R_390_TLS_GD32:
|
|
case R_390_TLS_GOTIE12:
|
|
case R_390_TLS_GOTIE20:
|
|
case R_390_TLS_GOTIE32:
|
|
case R_390_TLS_IEENT:
|
|
case R_390_TLS_IE32:
|
|
case R_390_TLS_LDM32:
|
|
if (h == NULL
|
|
&& local_got_refcounts == NULL)
|
|
{
|
|
bfd_size_type size;
|
|
|
|
size = symtab_hdr->sh_info;
|
|
size *= (sizeof (bfd_signed_vma) + 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_GOTPC:
|
|
case R_390_GOTPCDBL:
|
|
if (htab->elf.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_GOTPC:
|
|
case R_390_GOTPCDBL:
|
|
/* Got is created, nothing to be done. */
|
|
break;
|
|
|
|
case R_390_PLT16DBL:
|
|
case R_390_PLT32DBL:
|
|
case R_390_PLT32:
|
|
case R_390_PLTOFF16:
|
|
case R_390_PLTOFF32:
|
|
/* 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->needs_plt = 1;
|
|
h->plt.refcount += 1;
|
|
}
|
|
break;
|
|
|
|
case R_390_GOTPLT12:
|
|
case R_390_GOTPLT16:
|
|
case R_390_GOTPLT20:
|
|
case R_390_GOTPLT32:
|
|
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->needs_plt = 1;
|
|
h->plt.refcount += 1;
|
|
}
|
|
else
|
|
local_got_refcounts[r_symndx] += 1;
|
|
break;
|
|
|
|
case R_390_TLS_LDM32:
|
|
htab->tls_ldm_got.refcount += 1;
|
|
break;
|
|
|
|
case R_390_TLS_IE32:
|
|
case R_390_TLS_GOTIE12:
|
|
case R_390_TLS_GOTIE20:
|
|
case R_390_TLS_GOTIE32:
|
|
case R_390_TLS_IEENT:
|
|
if (info->shared)
|
|
info->flags |= DF_STATIC_TLS;
|
|
/* Fall through. */
|
|
|
|
case R_390_GOT12:
|
|
case R_390_GOT16:
|
|
case R_390_GOT20:
|
|
case R_390_GOT32:
|
|
case R_390_GOTENT:
|
|
case R_390_TLS_GD32:
|
|
/* This symbol requires a global offset table entry. */
|
|
switch (r_type)
|
|
{
|
|
default:
|
|
case R_390_GOT12:
|
|
case R_390_GOT16:
|
|
case R_390_GOT20:
|
|
case R_390_GOT32:
|
|
case R_390_GOTENT:
|
|
tls_type = GOT_NORMAL;
|
|
break;
|
|
case R_390_TLS_GD32:
|
|
tls_type = GOT_TLS_GD;
|
|
break;
|
|
case R_390_TLS_IE32:
|
|
case R_390_TLS_GOTIE32:
|
|
tls_type = GOT_TLS_IE;
|
|
break;
|
|
case R_390_TLS_GOTIE12:
|
|
case R_390_TLS_GOTIE20:
|
|
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)
|
|
(_("%B: `%s' accessed both as normal and thread local symbol"),
|
|
abfd, h->root.root.string);
|
|
return FALSE;
|
|
}
|
|
if (old_tls_type > tls_type)
|
|
tls_type = old_tls_type;
|
|
}
|
|
|
|
if (old_tls_type != tls_type)
|
|
{
|
|
if (h != NULL)
|
|
elf_s390_hash_entry (h)->tls_type = tls_type;
|
|
else
|
|
elf_s390_local_got_tls_type (abfd) [r_symndx] = tls_type;
|
|
}
|
|
|
|
if (r_type != R_390_TLS_IE32)
|
|
break;
|
|
/* Fall through. */
|
|
|
|
case R_390_TLS_LE32:
|
|
if (!info->shared)
|
|
break;
|
|
info->flags |= DF_STATIC_TLS;
|
|
/* Fall through. */
|
|
|
|
case R_390_8:
|
|
case R_390_16:
|
|
case R_390_32:
|
|
case R_390_PC16:
|
|
case R_390_PC16DBL:
|
|
case R_390_PC32DBL:
|
|
case R_390_PC32:
|
|
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->non_got_ref = 1;
|
|
|
|
/* 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
|
|
&& ((ELF32_R_TYPE (rel->r_info) != R_390_PC16
|
|
&& ELF32_R_TYPE (rel->r_info) != R_390_PC16DBL
|
|
&& ELF32_R_TYPE (rel->r_info) != R_390_PC32DBL
|
|
&& ELF32_R_TYPE (rel->r_info) != R_390_PC32)
|
|
|| (h != NULL
|
|
&& (! SYMBOLIC_BIND (info, h)
|
|
|| h->root.type == bfd_link_hash_defweak
|
|
|| !h->def_regular))))
|
|
|| (ELIMINATE_COPY_RELOCS
|
|
&& !info->shared
|
|
&& (sec->flags & SEC_ALLOC) != 0
|
|
&& h != NULL
|
|
&& (h->root.type == bfd_link_hash_defweak
|
|
|| !h->def_regular)))
|
|
{
|
|
struct elf_dyn_relocs *p;
|
|
struct elf_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)
|
|
{
|
|
if (htab->elf.dynobj == NULL)
|
|
htab->elf.dynobj = abfd;
|
|
|
|
sreloc = _bfd_elf_make_dynamic_reloc_section
|
|
(sec, htab->elf.dynobj, 2, abfd, /*rela?*/ TRUE);
|
|
|
|
if (sreloc == NULL)
|
|
return FALSE;
|
|
}
|
|
|
|
/* 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;
|
|
void *vpp;
|
|
Elf_Internal_Sym *isym;
|
|
|
|
isym = bfd_sym_from_r_symndx (&htab->sym_cache,
|
|
abfd, r_symndx);
|
|
if (isym == NULL)
|
|
return FALSE;
|
|
|
|
s = bfd_section_from_elf_index (abfd, isym->st_shndx);
|
|
if (s == NULL)
|
|
s = sec;
|
|
|
|
vpp = &elf_section_data (s)->local_dynrel;
|
|
head = (struct elf_dyn_relocs **) vpp;
|
|
}
|
|
|
|
p = *head;
|
|
if (p == NULL || p->sec != sec)
|
|
{
|
|
bfd_size_type amt = sizeof *p;
|
|
|
|
p = ((struct elf_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 (ELF32_R_TYPE (rel->r_info) == R_390_PC16
|
|
|| ELF32_R_TYPE (rel->r_info) == R_390_PC16DBL
|
|
|| ELF32_R_TYPE (rel->r_info) == R_390_PC32DBL
|
|
|| ELF32_R_TYPE (rel->r_info) == R_390_PC32)
|
|
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_elf_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:
|
|
BFD_ASSERT (h != NULL);
|
|
if (h != NULL
|
|
&& !bfd_elf_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 (asection *sec,
|
|
struct bfd_link_info *info,
|
|
Elf_Internal_Rela *rel,
|
|
struct elf_link_hash_entry *h,
|
|
Elf_Internal_Sym *sym)
|
|
{
|
|
if (h != NULL)
|
|
switch (ELF32_R_TYPE (rel->r_info))
|
|
{
|
|
case R_390_GNU_VTINHERIT:
|
|
case R_390_GNU_VTENTRY:
|
|
return NULL;
|
|
}
|
|
return _bfd_elf_gc_mark_hook (sec, info, rel, h, sym);
|
|
|
|
}
|
|
|
|
/* Update the got entry reference counts for the section being removed. */
|
|
|
|
static bfd_boolean
|
|
elf_s390_gc_sweep_hook (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;
|
|
|
|
if (info->relocatable)
|
|
return TRUE;
|
|
|
|
elf_section_data (sec)->local_dynrel = NULL;
|
|
|
|
symtab_hdr = &elf_symtab_hdr (abfd);
|
|
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 = ELF32_R_SYM (rel->r_info);
|
|
if (r_symndx >= symtab_hdr->sh_info)
|
|
{
|
|
struct elf_s390_link_hash_entry *eh;
|
|
struct elf_dyn_relocs **pp;
|
|
struct elf_dyn_relocs *p;
|
|
|
|
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;
|
|
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 = ELF32_R_TYPE (rel->r_info);
|
|
r_type = elf_s390_tls_transition (info, r_type, h != NULL);
|
|
switch (r_type)
|
|
{
|
|
case R_390_TLS_LDM32:
|
|
if (elf_s390_hash_table (info)->tls_ldm_got.refcount > 0)
|
|
elf_s390_hash_table (info)->tls_ldm_got.refcount -= 1;
|
|
break;
|
|
|
|
case R_390_TLS_GD32:
|
|
case R_390_TLS_IE32:
|
|
case R_390_TLS_GOTIE12:
|
|
case R_390_TLS_GOTIE20:
|
|
case R_390_TLS_GOTIE32:
|
|
case R_390_TLS_IEENT:
|
|
case R_390_GOT12:
|
|
case R_390_GOT16:
|
|
case R_390_GOT20:
|
|
case R_390_GOT32:
|
|
case R_390_GOTOFF16:
|
|
case R_390_GOTOFF32:
|
|
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_20:
|
|
case R_390_32:
|
|
case R_390_PC16:
|
|
case R_390_PC16DBL:
|
|
case R_390_PC32DBL:
|
|
case R_390_PC32:
|
|
if (info->shared)
|
|
break;
|
|
/* Fall through. */
|
|
|
|
case R_390_PLT16DBL:
|
|
case R_390_PLT32DBL:
|
|
case R_390_PLT32:
|
|
case R_390_PLTOFF16:
|
|
case R_390_PLTOFF32:
|
|
if (h != NULL)
|
|
{
|
|
if (h->plt.refcount > 0)
|
|
h->plt.refcount -= 1;
|
|
}
|
|
break;
|
|
|
|
case R_390_GOTPLT12:
|
|
case R_390_GOTPLT16:
|
|
case R_390_GOTPLT20:
|
|
case R_390_GOTPLT32:
|
|
case R_390_GOTPLTENT:
|
|
if (h != NULL)
|
|
{
|
|
if (h->plt.refcount > 0)
|
|
{
|
|
((struct elf_s390_link_hash_entry *) h)->gotplt_refcount--;
|
|
h->plt.refcount -= 1;
|
|
}
|
|
}
|
|
else if (local_got_refcounts != NULL)
|
|
{
|
|
if (local_got_refcounts[r_symndx] > 0)
|
|
local_got_refcounts[r_symndx] -= 1;
|
|
}
|
|
break;
|
|
|
|
default:
|
|
break;
|
|
}
|
|
}
|
|
|
|
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;
|
|
asection *s;
|
|
|
|
/* 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->needs_plt)
|
|
{
|
|
if (h->plt.refcount <= 0
|
|
|| SYMBOL_CALLS_LOCAL (info, h)
|
|
|| (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
|
|
&& h->root.type != bfd_link_hash_undefweak))
|
|
{
|
|
/* 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->needs_plt = 0;
|
|
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->u.weakdef != NULL)
|
|
{
|
|
BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined
|
|
|| h->u.weakdef->root.type == bfd_link_hash_defweak);
|
|
h->root.u.def.section = h->u.weakdef->root.u.def.section;
|
|
h->root.u.def.value = h->u.weakdef->root.u.def.value;
|
|
if (ELIMINATE_COPY_RELOCS || info->nocopyreloc)
|
|
h->non_got_ref = h->u.weakdef->non_got_ref;
|
|
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->non_got_ref)
|
|
return TRUE;
|
|
|
|
/* If -z nocopyreloc was given, we won't generate them either. */
|
|
if (info->nocopyreloc)
|
|
{
|
|
h->non_got_ref = 0;
|
|
return TRUE;
|
|
}
|
|
|
|
if (ELIMINATE_COPY_RELOCS)
|
|
{
|
|
struct elf_s390_link_hash_entry * eh;
|
|
struct elf_dyn_relocs *p;
|
|
|
|
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->non_got_ref = 0;
|
|
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 && h->size != 0)
|
|
{
|
|
htab->srelbss->size += sizeof (Elf32_External_Rela);
|
|
h->needs_copy = 1;
|
|
}
|
|
|
|
s = htab->sdynbss;
|
|
|
|
return _bfd_elf_adjust_dynamic_copy (h, s);
|
|
}
|
|
|
|
/* 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_dyn_relocs *p;
|
|
|
|
if (h->root.type == bfd_link_hash_indirect)
|
|
return TRUE;
|
|
|
|
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->forced_local)
|
|
{
|
|
if (! bfd_elf_link_record_dynamic_symbol (info, h))
|
|
return FALSE;
|
|
}
|
|
|
|
if (info->shared
|
|
|| WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, 0, h))
|
|
{
|
|
asection *s = htab->elf.splt;
|
|
|
|
/* If this is the first .plt entry, make room for the special
|
|
first entry. */
|
|
if (s->size == 0)
|
|
s->size += PLT_FIRST_ENTRY_SIZE;
|
|
|
|
h->plt.offset = s->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->def_regular)
|
|
{
|
|
h->root.u.def.section = s;
|
|
h->root.u.def.value = h->plt.offset;
|
|
}
|
|
|
|
/* Make room for this entry. */
|
|
s->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->elf.sgotplt->size += GOT_ENTRY_SIZE;
|
|
|
|
/* We also need to make an entry in the .rela.plt section. */
|
|
htab->elf.srelplt->size += sizeof (Elf32_External_Rela);
|
|
}
|
|
else
|
|
{
|
|
h->plt.offset = (bfd_vma) -1;
|
|
h->needs_plt = 0;
|
|
elf_s390_adjust_gotplt((struct elf_s390_link_hash_entry *) h);
|
|
}
|
|
}
|
|
else
|
|
{
|
|
h->plt.offset = (bfd_vma) -1;
|
|
h->needs_plt = 0;
|
|
elf_s390_adjust_gotplt((struct elf_s390_link_hash_entry *) h);
|
|
}
|
|
|
|
/* If R_390_TLS_{IE32,GOTIE32,GOTIE12,IEENT} symbol is now local to
|
|
the binary, we can optimize a bit. IE32 and GOTIE32 get converted
|
|
to R_390_TLS_LE32 requiring no TLS entry. For GOTIE12 and IEENT
|
|
we can save the dynamic TLS relocation. */
|
|
if (h->got.refcount > 0
|
|
&& !info->shared
|
|
&& h->dynindx == -1
|
|
&& elf_s390_hash_entry(h)->tls_type >= GOT_TLS_IE)
|
|
{
|
|
if (elf_s390_hash_entry(h)->tls_type == GOT_TLS_IE_NLT)
|
|
/* For the GOTIE access without a literal pool entry the offset has
|
|
to be stored somewhere. The immediate value in the instruction
|
|
is not bit enough so the value is stored in the got. */
|
|
{
|
|
h->got.offset = htab->elf.sgot->size;
|
|
htab->elf.sgot->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->forced_local)
|
|
{
|
|
if (! bfd_elf_link_record_dynamic_symbol (info, h))
|
|
return FALSE;
|
|
}
|
|
|
|
s = htab->elf.sgot;
|
|
h->got.offset = s->size;
|
|
s->size += GOT_ENTRY_SIZE;
|
|
/* R_390_TLS_GD32 needs 2 consecutive GOT slots. */
|
|
if (tls_type == GOT_TLS_GD)
|
|
s->size += GOT_ENTRY_SIZE;
|
|
dyn = htab->elf.dynamic_sections_created;
|
|
/* R_390_TLS_IE32 needs one dynamic relocation,
|
|
R_390_TLS_GD32 needs one if local symbol and two if global. */
|
|
if ((tls_type == GOT_TLS_GD && h->dynindx == -1)
|
|
|| tls_type >= GOT_TLS_IE)
|
|
htab->elf.srelgot->size += sizeof (Elf32_External_Rela);
|
|
else if (tls_type == GOT_TLS_GD)
|
|
htab->elf.srelgot->size += 2 * sizeof (Elf32_External_Rela);
|
|
else if ((ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
|
|
|| h->root.type != bfd_link_hash_undefweak)
|
|
&& (info->shared
|
|
|| WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 0, h)))
|
|
htab->elf.srelgot->size += sizeof (Elf32_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 (SYMBOL_CALLS_LOCAL (info, h))
|
|
{
|
|
struct elf_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;
|
|
}
|
|
}
|
|
|
|
/* Also discard relocs on undefined weak syms with non-default
|
|
visibility. */
|
|
if (eh->dyn_relocs != NULL
|
|
&& h->root.type == bfd_link_hash_undefweak)
|
|
{
|
|
if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)
|
|
eh->dyn_relocs = NULL;
|
|
|
|
/* Make sure undefined weak symbols are output as a dynamic
|
|
symbol in PIEs. */
|
|
else if (h->dynindx == -1
|
|
&& !h->forced_local)
|
|
{
|
|
if (! bfd_elf_link_record_dynamic_symbol (info, h))
|
|
return FALSE;
|
|
}
|
|
}
|
|
}
|
|
else if (ELIMINATE_COPY_RELOCS)
|
|
{
|
|
/* For the non-shared case, discard space for relocs against
|
|
symbols which turn out to need copy relocs or are not
|
|
dynamic. */
|
|
|
|
if (!h->non_got_ref
|
|
&& ((h->def_dynamic
|
|
&& !h->def_regular)
|
|
|| (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->forced_local)
|
|
{
|
|
if (! bfd_elf_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->size += p->count * sizeof (Elf32_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_dyn_relocs *p;
|
|
|
|
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->executable)
|
|
{
|
|
s = bfd_get_linker_section (dynobj, ".interp");
|
|
if (s == NULL)
|
|
abort ();
|
|
s->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 (! is_s390_elf (ibfd))
|
|
continue;
|
|
|
|
for (s = ibfd->sections; s != NULL; s = s->next)
|
|
{
|
|
struct elf_dyn_relocs *p;
|
|
|
|
for (p = 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->size += p->count * sizeof (Elf32_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_symtab_hdr (ibfd);
|
|
locsymcount = symtab_hdr->sh_info;
|
|
end_local_got = local_got + locsymcount;
|
|
local_tls_type = elf_s390_local_got_tls_type (ibfd);
|
|
s = htab->elf.sgot;
|
|
srela = htab->elf.srelgot;
|
|
for (; local_got < end_local_got; ++local_got, ++local_tls_type)
|
|
{
|
|
if (*local_got > 0)
|
|
{
|
|
*local_got = s->size;
|
|
s->size += GOT_ENTRY_SIZE;
|
|
if (*local_tls_type == GOT_TLS_GD)
|
|
s->size += GOT_ENTRY_SIZE;
|
|
if (info->shared)
|
|
srela->size += sizeof (Elf32_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_LDM32
|
|
relocs. */
|
|
htab->tls_ldm_got.offset = htab->elf.sgot->size;
|
|
htab->elf.sgot->size += 2 * GOT_ENTRY_SIZE;
|
|
htab->elf.srelgot->size += sizeof (Elf32_External_Rela);
|
|
}
|
|
else
|
|
htab->tls_ldm_got.offset = -1;
|
|
|
|
/* Allocate global sym .plt and .got entries, and space for global
|
|
sym dynamic relocs. */
|
|
elf_link_hash_traverse (&htab->elf, allocate_dynrelocs, (PTR) info);
|
|
|
|
/* 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->elf.splt
|
|
|| s == htab->elf.sgot
|
|
|| s == htab->elf.sgotplt
|
|
|| s == htab->sdynbss)
|
|
{
|
|
/* Strip this section if we don't need it; see the
|
|
comment below. */
|
|
}
|
|
else if (CONST_STRNEQ (bfd_get_section_name (dynobj, s), ".rela"))
|
|
{
|
|
if (s->size != 0)
|
|
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->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. */
|
|
|
|
s->flags |= SEC_EXCLUDE;
|
|
continue;
|
|
}
|
|
|
|
if ((s->flags & SEC_HAS_CONTENTS) == 0)
|
|
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->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_elf_add_dynamic_entry (info, TAG, VAL)
|
|
|
|
if (info->executable)
|
|
{
|
|
if (!add_dynamic_entry (DT_DEBUG, 0))
|
|
return FALSE;
|
|
}
|
|
|
|
if (htab->elf.splt->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 (Elf32_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_sec is NULL, we should have signalled an error already. */
|
|
if (elf_hash_table (info)->tls_sec == NULL)
|
|
return 0;
|
|
return elf_hash_table (info)->tls_sec->vma;
|
|
}
|
|
|
|
/* 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_hash_table *htab = elf_hash_table (info);
|
|
|
|
/* If tls_sec is NULL, we should have signalled an error already. */
|
|
if (htab->tls_sec == NULL)
|
|
return 0;
|
|
return htab->tls_size + htab->tls_sec->vma - address;
|
|
}
|
|
|
|
/* Complain if TLS instruction relocation is against an invalid
|
|
instruction. */
|
|
|
|
static void
|
|
invalid_tls_insn (input_bfd, input_section, rel)
|
|
bfd *input_bfd;
|
|
asection *input_section;
|
|
Elf_Internal_Rela *rel;
|
|
{
|
|
reloc_howto_type *howto;
|
|
|
|
howto = elf_howto_table + ELF32_R_TYPE (rel->r_info);
|
|
(*_bfd_error_handler)
|
|
(_("%B(%A+0x%lx): invalid instruction for TLS relocation %s"),
|
|
input_bfd,
|
|
input_section,
|
|
(long) rel->r_offset,
|
|
howto->name);
|
|
bfd_set_error (bfd_error_bad_value);
|
|
}
|
|
|
|
/* 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;
|
|
|
|
BFD_ASSERT (is_s390_elf (input_bfd));
|
|
|
|
htab = elf_s390_hash_table (info);
|
|
symtab_hdr = &elf_symtab_hdr (input_bfd);
|
|
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 = ELF32_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 = ELF32_R_SYM (rel->r_info);
|
|
|
|
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
|
|
{
|
|
bfd_boolean warned ATTRIBUTE_UNUSED;
|
|
|
|
RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
|
|
r_symndx, symtab_hdr, sym_hashes,
|
|
h, sec, relocation,
|
|
unresolved_reloc, warned);
|
|
}
|
|
|
|
if (sec != NULL && discarded_section (sec))
|
|
RELOC_AGAINST_DISCARDED_SECTION (info, input_bfd, input_section,
|
|
rel, 1, relend, howto, 0, contents);
|
|
|
|
if (info->relocatable)
|
|
continue;
|
|
|
|
switch (r_type)
|
|
{
|
|
case R_390_GOTPLT12:
|
|
case R_390_GOTPLT16:
|
|
case R_390_GOTPLT20:
|
|
case R_390_GOTPLT32:
|
|
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->elf.sgot->output_section->vma;
|
|
break;
|
|
}
|
|
/* Fall through. */
|
|
|
|
case R_390_GOT12:
|
|
case R_390_GOT16:
|
|
case R_390_GOT20:
|
|
case R_390_GOT32:
|
|
case R_390_GOTENT:
|
|
/* Relocation is to the entry for this symbol in the global
|
|
offset table. */
|
|
if (htab->elf.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->shared, h)
|
|
|| (info->shared
|
|
&& SYMBOL_REFERENCES_LOCAL (info, h))
|
|
|| (ELF_ST_VISIBILITY (h->other)
|
|
&& h->root.type == bfd_link_hash_undefweak))
|
|
{
|
|
/* 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_32 (output_bfd, relocation,
|
|
htab->elf.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 4. 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_32 (output_bfd, relocation,
|
|
htab->elf.sgot->contents + off);
|
|
|
|
if (info->shared)
|
|
{
|
|
asection *srelgot;
|
|
Elf_Internal_Rela outrel;
|
|
bfd_byte *loc;
|
|
|
|
srelgot = htab->elf.srelgot;
|
|
if (srelgot == NULL)
|
|
abort ();
|
|
|
|
outrel.r_offset = (htab->elf.sgot->output_section->vma
|
|
+ htab->elf.sgot->output_offset
|
|
+ off);
|
|
outrel.r_info = ELF32_R_INFO (0, R_390_RELATIVE);
|
|
outrel.r_addend = relocation;
|
|
loc = srelgot->contents;
|
|
loc += srelgot->reloc_count++ * sizeof (Elf32_External_Rela);
|
|
bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
|
|
}
|
|
|
|
local_got_offsets[r_symndx] |= 1;
|
|
}
|
|
}
|
|
|
|
if (off >= (bfd_vma) -2)
|
|
abort ();
|
|
|
|
relocation = htab->elf.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->elf.sgot->output_section->vma;
|
|
|
|
break;
|
|
|
|
case R_390_GOTOFF16:
|
|
case R_390_GOTOFF32:
|
|
/* 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->elf.sgot->output_section->vma;
|
|
break;
|
|
|
|
case R_390_GOTPC:
|
|
case R_390_GOTPCDBL:
|
|
/* Use global offset table as symbol value. */
|
|
relocation = htab->elf.sgot->output_section->vma;
|
|
unresolved_reloc = FALSE;
|
|
break;
|
|
|
|
case R_390_PLT16DBL:
|
|
case R_390_PLT32DBL:
|
|
case R_390_PLT32:
|
|
/* 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->elf.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->elf.splt->output_section->vma
|
|
+ htab->elf.splt->output_offset
|
|
+ h->plt.offset);
|
|
unresolved_reloc = FALSE;
|
|
break;
|
|
|
|
case R_390_PLTOFF16:
|
|
case R_390_PLTOFF32:
|
|
/* 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->elf.splt == NULL)
|
|
{
|
|
relocation -= htab->elf.sgot->output_section->vma;
|
|
break;
|
|
}
|
|
|
|
relocation = (htab->elf.splt->output_section->vma
|
|
+ htab->elf.splt->output_offset
|
|
+ h->plt.offset
|
|
- htab->elf.sgot->output_section->vma);
|
|
unresolved_reloc = FALSE;
|
|
break;
|
|
|
|
case R_390_8:
|
|
case R_390_16:
|
|
case R_390_32:
|
|
case R_390_PC16:
|
|
case R_390_PC16DBL:
|
|
case R_390_PC32DBL:
|
|
case R_390_PC32:
|
|
if ((input_section->flags & SEC_ALLOC) == 0)
|
|
break;
|
|
|
|
if ((info->shared
|
|
&& (h == NULL
|
|
|| ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
|
|
|| h->root.type != bfd_link_hash_undefweak)
|
|
&& ((r_type != R_390_PC16
|
|
&& r_type != R_390_PC16DBL
|
|
&& r_type != R_390_PC32DBL
|
|
&& r_type != R_390_PC32)
|
|
|| !SYMBOL_CALLS_LOCAL (info, h)))
|
|
|| (ELIMINATE_COPY_RELOCS
|
|
&& !info->shared
|
|
&& h != NULL
|
|
&& h->dynindx != -1
|
|
&& !h->non_got_ref
|
|
&& ((h->def_dynamic
|
|
&& !h->def_regular)
|
|
|| 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_PC32DBL
|
|
|| r_type == R_390_PC32
|
|
|| !info->shared
|
|
|| !SYMBOLIC_BIND (info, h)
|
|
|| !h->def_regular))
|
|
{
|
|
outrel.r_info = ELF32_R_INFO (h->dynindx, r_type);
|
|
outrel.r_addend = rel->r_addend;
|
|
}
|
|
else
|
|
{
|
|
/* This symbol is local, or marked to become local. */
|
|
outrel.r_addend = relocation + rel->r_addend;
|
|
if (r_type == R_390_32)
|
|
{
|
|
relocate = TRUE;
|
|
outrel.r_info = ELF32_R_INFO (0, R_390_RELATIVE);
|
|
}
|
|
else
|
|
{
|
|
long sindx;
|
|
|
|
if (bfd_is_abs_section (sec))
|
|
sindx = 0;
|
|
else if (sec == NULL || sec->owner == NULL)
|
|
{
|
|
bfd_set_error(bfd_error_bad_value);
|
|
return FALSE;
|
|
}
|
|
else
|
|
{
|
|
asection *osec;
|
|
|
|
osec = sec->output_section;
|
|
sindx = elf_section_data (osec)->dynindx;
|
|
if (sindx == 0)
|
|
{
|
|
osec = htab->elf.text_index_section;
|
|
sindx = elf_section_data (osec)->dynindx;
|
|
}
|
|
BFD_ASSERT (sindx != 0);
|
|
|
|
/* We are turning this relocation into one
|
|
against a section symbol, so subtract out
|
|
the output section's address but not the
|
|
offset of the input section in the output
|
|
section. */
|
|
outrel.r_addend -= osec->vma;
|
|
}
|
|
outrel.r_info = ELF32_R_INFO (sindx, r_type);
|
|
}
|
|
}
|
|
|
|
sreloc = elf_section_data (input_section)->sreloc;
|
|
if (sreloc == NULL)
|
|
abort ();
|
|
|
|
loc = sreloc->contents;
|
|
loc += sreloc->reloc_count++ * sizeof (Elf32_External_Rela);
|
|
bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
|
|
|
|
/* 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_IE32:
|
|
if (info->shared)
|
|
{
|
|
Elf_Internal_Rela outrel;
|
|
asection *sreloc;
|
|
bfd_byte *loc;
|
|
|
|
outrel.r_offset = rel->r_offset
|
|
+ input_section->output_section->vma
|
|
+ input_section->output_offset;
|
|
outrel.r_info = ELF32_R_INFO (0, R_390_RELATIVE);
|
|
sreloc = elf_section_data (input_section)->sreloc;
|
|
if (sreloc == NULL)
|
|
abort ();
|
|
loc = sreloc->contents;
|
|
loc += sreloc->reloc_count++ * sizeof (Elf32_External_Rela);
|
|
bfd_elf32_swap_reloc_out (output_bfd, &outrel, loc);
|
|
}
|
|
/* Fall through. */
|
|
|
|
case R_390_TLS_GD32:
|
|
case R_390_TLS_GOTIE32:
|
|
r_type = elf_s390_tls_transition (info, r_type, h == NULL);
|
|
tls_type = GOT_UNKNOWN;
|
|
if (h == NULL && local_got_offsets)
|
|
tls_type = elf_s390_local_got_tls_type (input_bfd) [r_symndx];
|
|
else if (h != NULL)
|
|
{
|
|
tls_type = elf_s390_hash_entry(h)->tls_type;
|
|
if (!info->shared && h->dynindx == -1 && tls_type >= GOT_TLS_IE)
|
|
r_type = R_390_TLS_LE32;
|
|
}
|
|
if (r_type == R_390_TLS_GD32 && tls_type >= GOT_TLS_IE)
|
|
r_type = R_390_TLS_IE32;
|
|
|
|
if (r_type == R_390_TLS_LE32)
|
|
{
|
|
/* This relocation gets optimized away by the local exec
|
|
access optimization. */
|
|
BFD_ASSERT (! unresolved_reloc);
|
|
bfd_put_32 (output_bfd, -tpoff (info, relocation),
|
|
contents + rel->r_offset);
|
|
continue;
|
|
}
|
|
|
|
if (htab->elf.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->elf.srelgot == NULL)
|
|
abort ();
|
|
|
|
outrel.r_offset = (htab->elf.sgot->output_section->vma
|
|
+ htab->elf.sgot->output_offset + off);
|
|
|
|
indx = h && h->dynindx != -1 ? h->dynindx : 0;
|
|
if (r_type == R_390_TLS_GD32)
|
|
dr_type = R_390_TLS_DTPMOD;
|
|
else
|
|
dr_type = R_390_TLS_TPOFF;
|
|
if (dr_type == R_390_TLS_TPOFF && indx == 0)
|
|
outrel.r_addend = relocation - dtpoff_base (info);
|
|
else
|
|
outrel.r_addend = 0;
|
|
outrel.r_info = ELF32_R_INFO (indx, dr_type);
|
|
loc = htab->elf.srelgot->contents;
|
|
loc += htab->elf.srelgot->reloc_count++
|
|
* sizeof (Elf32_External_Rela);
|
|
bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
|
|
|
|
if (r_type == R_390_TLS_GD32)
|
|
{
|
|
if (indx == 0)
|
|
{
|
|
BFD_ASSERT (! unresolved_reloc);
|
|
bfd_put_32 (output_bfd,
|
|
relocation - dtpoff_base (info),
|
|
htab->elf.sgot->contents + off + GOT_ENTRY_SIZE);
|
|
}
|
|
else
|
|
{
|
|
outrel.r_info = ELF32_R_INFO (indx, R_390_TLS_DTPOFF);
|
|
outrel.r_offset += GOT_ENTRY_SIZE;
|
|
outrel.r_addend = 0;
|
|
htab->elf.srelgot->reloc_count++;
|
|
loc += sizeof (Elf32_External_Rela);
|
|
bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
|
|
}
|
|
}
|
|
|
|
if (h != NULL)
|
|
h->got.offset |= 1;
|
|
else
|
|
local_got_offsets[r_symndx] |= 1;
|
|
}
|
|
|
|
if (off >= (bfd_vma) -2)
|
|
abort ();
|
|
if (r_type == ELF32_R_TYPE (rel->r_info))
|
|
{
|
|
relocation = htab->elf.sgot->output_offset + off;
|
|
if (r_type == R_390_TLS_IE32 || r_type == R_390_TLS_IEENT)
|
|
relocation += htab->elf.sgot->output_section->vma;
|
|
unresolved_reloc = FALSE;
|
|
}
|
|
else
|
|
{
|
|
bfd_put_32 (output_bfd, htab->elf.sgot->output_offset + off,
|
|
contents + rel->r_offset);
|
|
continue;
|
|
}
|
|
break;
|
|
|
|
case R_390_TLS_GOTIE12:
|
|
case R_390_TLS_GOTIE20:
|
|
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->elf.sgot == NULL)
|
|
abort ();
|
|
|
|
BFD_ASSERT (! unresolved_reloc);
|
|
bfd_put_32 (output_bfd, -tpoff (info, relocation),
|
|
htab->elf.sgot->contents + off);
|
|
relocation = htab->elf.sgot->output_offset + off;
|
|
if (r_type == R_390_TLS_IEENT)
|
|
relocation += htab->elf.sgot->output_section->vma;
|
|
unresolved_reloc = FALSE;
|
|
break;
|
|
|
|
case R_390_TLS_LDM32:
|
|
if (! info->shared)
|
|
/* The literal pool entry this relocation refers to gets ignored
|
|
by the optimized code of the local exec model. Do nothing
|
|
and the value will turn out zero. */
|
|
continue;
|
|
|
|
if (htab->elf.sgot == NULL)
|
|
abort ();
|
|
|
|
off = htab->tls_ldm_got.offset;
|
|
if (off & 1)
|
|
off &= ~1;
|
|
else
|
|
{
|
|
Elf_Internal_Rela outrel;
|
|
bfd_byte *loc;
|
|
|
|
if (htab->elf.srelgot == NULL)
|
|
abort ();
|
|
|
|
outrel.r_offset = (htab->elf.sgot->output_section->vma
|
|
+ htab->elf.sgot->output_offset + off);
|
|
|
|
bfd_put_32 (output_bfd, 0,
|
|
htab->elf.sgot->contents + off + GOT_ENTRY_SIZE);
|
|
outrel.r_info = ELF32_R_INFO (0, R_390_TLS_DTPMOD);
|
|
outrel.r_addend = 0;
|
|
loc = htab->elf.srelgot->contents;
|
|
loc += htab->elf.srelgot->reloc_count++
|
|
* sizeof (Elf32_External_Rela);
|
|
bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
|
|
htab->tls_ldm_got.offset |= 1;
|
|
}
|
|
relocation = htab->elf.sgot->output_offset + off;
|
|
unresolved_reloc = FALSE;
|
|
break;
|
|
|
|
case R_390_TLS_LE32:
|
|
if (info->shared)
|
|
{
|
|
/* Linking a shared library with non-fpic code requires
|
|
a R_390_TLS_TPOFF relocation. */
|
|
Elf_Internal_Rela outrel;
|
|
asection *sreloc;
|
|
bfd_byte *loc;
|
|
int indx;
|
|
|
|
outrel.r_offset = rel->r_offset
|
|
+ input_section->output_section->vma
|
|
+ input_section->output_offset;
|
|
if (h != NULL && h->dynindx != -1)
|
|
indx = h->dynindx;
|
|
else
|
|
indx = 0;
|
|
outrel.r_info = ELF32_R_INFO (indx, R_390_TLS_TPOFF);
|
|
if (indx == 0)
|
|
outrel.r_addend = relocation - dtpoff_base (info);
|
|
else
|
|
outrel.r_addend = 0;
|
|
sreloc = elf_section_data (input_section)->sreloc;
|
|
if (sreloc == NULL)
|
|
abort ();
|
|
loc = sreloc->contents;
|
|
loc += sreloc->reloc_count++ * sizeof (Elf32_External_Rela);
|
|
bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
|
|
}
|
|
else
|
|
{
|
|
BFD_ASSERT (! unresolved_reloc);
|
|
bfd_put_32 (output_bfd, -tpoff (info, relocation),
|
|
contents + rel->r_offset);
|
|
}
|
|
continue;
|
|
|
|
case R_390_TLS_LDO32:
|
|
if (info->shared || (input_section->flags & SEC_DEBUGGING))
|
|
relocation -= dtpoff_base (info);
|
|
else
|
|
/* When converting LDO to LE, we must negate. */
|
|
relocation = -tpoff (info, relocation);
|
|
break;
|
|
|
|
/* Relocations for tls instructions. */
|
|
case R_390_TLS_LOAD:
|
|
case R_390_TLS_GDCALL:
|
|
case R_390_TLS_LDCALL:
|
|
tls_type = GOT_UNKNOWN;
|
|
if (h == NULL && local_got_offsets)
|
|
tls_type = elf_s390_local_got_tls_type (input_bfd) [r_symndx];
|
|
else if (h != NULL)
|
|
tls_type = elf_s390_hash_entry(h)->tls_type;
|
|
|
|
if (tls_type == GOT_TLS_GD)
|
|
continue;
|
|
|
|
if (r_type == R_390_TLS_LOAD)
|
|
{
|
|
if (!info->shared && (h == NULL || h->dynindx == -1))
|
|
{
|
|
/* IE->LE transition. Four valid cases:
|
|
l %rx,0(0,%ry) -> lr %rx,%ry + bcr 0,0
|
|
l %rx,0(%ry,0) -> lr %rx,%ry + bcr 0,0
|
|
l %rx,0(%ry,%r12) -> lr %rx,%ry + bcr 0,0
|
|
l %rx,0(%r12,%ry) -> lr %rx,%ry + bcr 0,0 */
|
|
unsigned int insn, ry;
|
|
|
|
insn = bfd_get_32 (input_bfd, contents + rel->r_offset);
|
|
ry = 0;
|
|
if ((insn & 0xff00f000) == 0x58000000)
|
|
/* l %rx,0(%ry,0) -> lr %rx,%ry + bcr 0,0 */
|
|
ry = (insn & 0x000f0000);
|
|
else if ((insn & 0xff0f0000) == 0x58000000)
|
|
/* l %rx,0(0,%ry) -> lr %rx,%ry + bcr 0,0 */
|
|
ry = (insn & 0x0000f000) << 4;
|
|
else if ((insn & 0xff00f000) == 0x5800c000)
|
|
/* l %rx,0(%ry,%r12) -> lr %rx,%ry + bcr 0,0 */
|
|
ry = (insn & 0x000f0000);
|
|
else if ((insn & 0xff0f0000) == 0x580c0000)
|
|
/* l %rx,0(%r12,%ry) -> lr %rx,%ry + bcr 0,0 */
|
|
ry = (insn & 0x0000f000) << 4;
|
|
else
|
|
invalid_tls_insn (input_bfd, input_section, rel);
|
|
insn = 0x18000700 | (insn & 0x00f00000) | ry;
|
|
bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
|
|
}
|
|
}
|
|
else if (r_type == R_390_TLS_GDCALL)
|
|
{
|
|
unsigned int insn;
|
|
|
|
insn = bfd_get_32 (input_bfd, contents + rel->r_offset);
|
|
if ((insn & 0xff000fff) != 0x4d000000 &&
|
|
(insn & 0xffff0000) != 0xc0e50000 &&
|
|
(insn & 0xff000000) != 0x0d000000)
|
|
invalid_tls_insn (input_bfd, input_section, rel);
|
|
if (!info->shared && (h == NULL || h->dynindx == -1))
|
|
{
|
|
if ((insn & 0xff000000) == 0x0d000000)
|
|
{
|
|
/* GD->LE transition.
|
|
basr rx, ry -> nopr r7 */
|
|
insn = 0x07070000 | (insn & 0xffff);
|
|
}
|
|
else if ((insn & 0xff000000) == 0x4d000000)
|
|
{
|
|
/* GD->LE transition.
|
|
bas %r14,0(%rx,%r13) -> bc 0,0 */
|
|
insn = 0x47000000;
|
|
}
|
|
else
|
|
{
|
|
/* GD->LE transition.
|
|
brasl %r14,_tls_get_offset@plt -> brcl 0,. */
|
|
insn = 0xc0040000;
|
|
bfd_put_16 (output_bfd, 0x0000,
|
|
contents + rel->r_offset + 4);
|
|
}
|
|
}
|
|
else
|
|
{
|
|
/* If basr is used in the pic case to invoke
|
|
_tls_get_offset, something went wrong before. */
|
|
if ((insn & 0xff000000) == 0x0d000000)
|
|
invalid_tls_insn (input_bfd, input_section, rel);
|
|
|
|
if ((insn & 0xff000000) == 0x4d000000)
|
|
{
|
|
/* GD->IE transition.
|
|
bas %r14,0(%rx,%r13) -> l %r2,0(%r2,%r12) */
|
|
insn = 0x5822c000;
|
|
}
|
|
else
|
|
{
|
|
/* GD->IE transition.
|
|
brasl %r14,__tls_get_addr@plt ->
|
|
l %r2,0(%r2,%r12) ; bcr 0,0 */
|
|
insn = 0x5822c000;
|
|
bfd_put_16 (output_bfd, 0x0700,
|
|
contents + rel->r_offset + 4);
|
|
}
|
|
}
|
|
bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
|
|
}
|
|
else if (r_type == R_390_TLS_LDCALL)
|
|
{
|
|
if (!info->shared)
|
|
{
|
|
unsigned int insn;
|
|
|
|
insn = bfd_get_32 (input_bfd, contents + rel->r_offset);
|
|
if ((insn & 0xff000fff) != 0x4d000000 &&
|
|
(insn & 0xffff0000) != 0xc0e50000 &&
|
|
(insn & 0xff000000) != 0x0d000000)
|
|
invalid_tls_insn (input_bfd, input_section, rel);
|
|
|
|
if ((insn & 0xff000000) == 0x0d000000)
|
|
{
|
|
/* LD->LE transition.
|
|
basr rx, ry -> nopr r7 */
|
|
insn = 0x07070000 | (insn & 0xffff);
|
|
}
|
|
else if ((insn & 0xff000000) == 0x4d000000)
|
|
{
|
|
/* LD->LE transition.
|
|
bas %r14,0(%rx,%r13) -> bc 0,0 */
|
|
insn = 0x47000000;
|
|
}
|
|
else
|
|
{
|
|
/* LD->LE transition.
|
|
brasl %r14,__tls_get_offset@plt -> brcl 0,. */
|
|
insn = 0xc0040000;
|
|
bfd_put_16 (output_bfd, 0x0000,
|
|
contents + rel->r_offset + 4);
|
|
}
|
|
bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
|
|
}
|
|
}
|
|
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->def_dynamic)
|
|
&& _bfd_elf_section_offset (output_bfd, info, input_section,
|
|
rel->r_offset) != (bfd_vma) -1)
|
|
(*_bfd_error_handler)
|
|
(_("%B(%A+0x%lx): unresolvable %s relocation against symbol `%s'"),
|
|
input_bfd,
|
|
input_section,
|
|
(long) rel->r_offset,
|
|
howto->name,
|
|
h->root.root.string);
|
|
|
|
if (r_type == R_390_20
|
|
|| r_type == R_390_GOT20
|
|
|| r_type == R_390_GOTPLT20
|
|
|| r_type == R_390_TLS_GOTIE20)
|
|
{
|
|
relocation += rel->r_addend;
|
|
relocation = (relocation&0xfff) << 8 | (relocation&0xff000) >> 12;
|
|
r = _bfd_final_link_relocate (howto, input_bfd, input_section,
|
|
contents, rel->r_offset,
|
|
relocation, 0);
|
|
}
|
|
else
|
|
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, (h ? &h->root : NULL), name, howto->name,
|
|
(bfd_vma) 0, input_bfd, input_section,
|
|
rel->r_offset)))
|
|
return FALSE;
|
|
}
|
|
else
|
|
{
|
|
(*_bfd_error_handler)
|
|
(_("%B(%A+0x%lx): reloc against `%s': error %d"),
|
|
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;
|
|
bfd_vma relative_offset;
|
|
|
|
/* This symbol has an entry in the procedure linkage table. Set
|
|
it up. */
|
|
if (h->dynindx == -1
|
|
|| htab->elf.splt == NULL
|
|
|| htab->elf.sgotplt == NULL
|
|
|| htab->elf.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 4,
|
|
addr & GOT addr. */
|
|
got_offset = (plt_index + 3) * GOT_ENTRY_SIZE;
|
|
|
|
/* S390 uses halfwords for relative branch calc! */
|
|
relative_offset = - ((PLT_FIRST_ENTRY_SIZE +
|
|
(PLT_ENTRY_SIZE * plt_index) + 18) / 2);
|
|
/* If offset is > 32768, branch to a previous branch
|
|
390 can only handle +-64 K jumps. */
|
|
if ( -32768 > (int) relative_offset )
|
|
relative_offset
|
|
= -(unsigned) (((65536 / PLT_ENTRY_SIZE - 1) * PLT_ENTRY_SIZE) / 2);
|
|
|
|
/* Fill in the entry in the procedure linkage table. */
|
|
if (!info->shared)
|
|
{
|
|
memcpy (htab->elf.splt->contents + h->plt.offset, elf_s390_plt_entry,
|
|
PLT_ENTRY_SIZE);
|
|
|
|
/* Adjust jump to the first plt entry. */
|
|
bfd_put_32 (output_bfd, (bfd_vma) 0+(relative_offset << 16),
|
|
htab->elf.splt->contents + h->plt.offset + 20);
|
|
|
|
/* Push the GOT offset field. */
|
|
bfd_put_32 (output_bfd,
|
|
(htab->elf.sgotplt->output_section->vma
|
|
+ htab->elf.sgotplt->output_offset
|
|
+ got_offset),
|
|
htab->elf.splt->contents + h->plt.offset + 24);
|
|
}
|
|
else if (got_offset < 4096)
|
|
{
|
|
/* The GOT offset is small enough to be used directly as
|
|
displacement. */
|
|
memcpy (htab->elf.splt->contents + h->plt.offset,
|
|
elf_s390_plt_pic12_entry,
|
|
PLT_ENTRY_SIZE);
|
|
|
|
/* Put in the GOT offset as displacement value. The 0xc000
|
|
value comes from the first word of the plt entry. Look
|
|
at the elf_s390_plt_pic16_entry content. */
|
|
bfd_put_16 (output_bfd, (bfd_vma)0xc000 | got_offset,
|
|
htab->elf.splt->contents + h->plt.offset + 2);
|
|
|
|
/* Adjust the jump to the first plt entry. */
|
|
bfd_put_32 (output_bfd, (bfd_vma) 0+(relative_offset << 16),
|
|
htab->elf.splt->contents + h->plt.offset + 20);
|
|
}
|
|
else if (got_offset < 32768)
|
|
{
|
|
/* The GOT offset is too big for a displacement but small
|
|
enough to be a signed 16 bit immediate value as it can be
|
|
used in an lhi instruction. */
|
|
memcpy (htab->elf.splt->contents + h->plt.offset,
|
|
elf_s390_plt_pic16_entry,
|
|
PLT_ENTRY_SIZE);
|
|
|
|
/* Put in the GOT offset for the lhi instruction. */
|
|
bfd_put_16 (output_bfd, (bfd_vma)got_offset,
|
|
htab->elf.splt->contents + h->plt.offset + 2);
|
|
|
|
/* Adjust the jump to the first plt entry. */
|
|
bfd_put_32 (output_bfd, (bfd_vma) 0+(relative_offset << 16),
|
|
htab->elf.splt->contents + h->plt.offset + 20);
|
|
}
|
|
else
|
|
{
|
|
memcpy (htab->elf.splt->contents + h->plt.offset,
|
|
elf_s390_plt_pic_entry,
|
|
PLT_ENTRY_SIZE);
|
|
|
|
/* Adjust the jump to the first plt entry. */
|
|
bfd_put_32 (output_bfd, (bfd_vma) 0+(relative_offset << 16),
|
|
htab->elf.splt->contents + h->plt.offset + 20);
|
|
|
|
/* Push the GOT offset field. */
|
|
bfd_put_32 (output_bfd, got_offset,
|
|
htab->elf.splt->contents + h->plt.offset + 24);
|
|
}
|
|
/* Insert offset into reloc. table here. */
|
|
bfd_put_32 (output_bfd, plt_index * sizeof (Elf32_External_Rela),
|
|
htab->elf.splt->contents + h->plt.offset + 28);
|
|
|
|
/* Fill in the entry in the global offset table.
|
|
Points to instruction after GOT offset. */
|
|
bfd_put_32 (output_bfd,
|
|
(htab->elf.splt->output_section->vma
|
|
+ htab->elf.splt->output_offset
|
|
+ h->plt.offset
|
|
+ 12),
|
|
htab->elf.sgotplt->contents + got_offset);
|
|
|
|
/* Fill in the entry in the .rela.plt section. */
|
|
rela.r_offset = (htab->elf.sgotplt->output_section->vma
|
|
+ htab->elf.sgotplt->output_offset
|
|
+ got_offset);
|
|
rela.r_info = ELF32_R_INFO (h->dynindx, R_390_JMP_SLOT);
|
|
rela.r_addend = 0;
|
|
loc = htab->elf.srelplt->contents + plt_index * sizeof (Elf32_External_Rela);
|
|
bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
|
|
|
|
if (!h->def_regular)
|
|
{
|
|
/* 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->elf.sgot == NULL || htab->elf.srelgot == NULL)
|
|
abort ();
|
|
|
|
rela.r_offset = (htab->elf.sgot->output_section->vma
|
|
+ htab->elf.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
|
|
&& SYMBOL_REFERENCES_LOCAL (info, h))
|
|
{
|
|
if (!h->def_regular)
|
|
return FALSE;
|
|
BFD_ASSERT((h->got.offset & 1) != 0);
|
|
rela.r_info = ELF32_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_32 (output_bfd, (bfd_vma) 0, htab->elf.sgot->contents + h->got.offset);
|
|
rela.r_info = ELF32_R_INFO (h->dynindx, R_390_GLOB_DAT);
|
|
rela.r_addend = 0;
|
|
}
|
|
|
|
loc = htab->elf.srelgot->contents;
|
|
loc += htab->elf.srelgot->reloc_count++ * sizeof (Elf32_External_Rela);
|
|
bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
|
|
}
|
|
|
|
if (h->needs_copy)
|
|
{
|
|
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 = ELF32_R_INFO (h->dynindx, R_390_COPY);
|
|
rela.r_addend = 0;
|
|
loc = htab->srelbss->contents;
|
|
loc += htab->srelbss->reloc_count++ * sizeof (Elf32_External_Rela);
|
|
bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
|
|
}
|
|
|
|
/* Mark some specially defined symbols as absolute. */
|
|
if (strcmp (h->root.root.string, "_DYNAMIC") == 0
|
|
|| h == htab->elf.hgot
|
|
|| h == htab->elf.hplt)
|
|
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) ELF32_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_linker_section (dynobj, ".dynamic");
|
|
|
|
if (htab->elf.dynamic_sections_created)
|
|
{
|
|
Elf32_External_Dyn *dyncon, *dynconend;
|
|
|
|
if (sdyn == NULL || htab->elf.sgot == NULL)
|
|
abort ();
|
|
|
|
dyncon = (Elf32_External_Dyn *) sdyn->contents;
|
|
dynconend = (Elf32_External_Dyn *) (sdyn->contents + sdyn->size);
|
|
for (; dyncon < dynconend; dyncon++)
|
|
{
|
|
Elf_Internal_Dyn dyn;
|
|
asection *s;
|
|
|
|
bfd_elf32_swap_dyn_in (dynobj, dyncon, &dyn);
|
|
|
|
switch (dyn.d_tag)
|
|
{
|
|
default:
|
|
continue;
|
|
|
|
case DT_PLTGOT:
|
|
dyn.d_un.d_ptr = htab->elf.sgot->output_section->vma;
|
|
break;
|
|
|
|
case DT_JMPREL:
|
|
dyn.d_un.d_ptr = htab->elf.srelplt->output_section->vma;
|
|
break;
|
|
|
|
case DT_PLTRELSZ:
|
|
s = htab->elf.srelplt->output_section;
|
|
dyn.d_un.d_val = s->size;
|
|
break;
|
|
}
|
|
|
|
bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
|
|
}
|
|
|
|
/* Fill in the special first entry in the procedure linkage table. */
|
|
if (htab->elf.splt && htab->elf.splt->size > 0)
|
|
{
|
|
memset (htab->elf.splt->contents, 0, PLT_FIRST_ENTRY_SIZE);
|
|
if (info->shared)
|
|
{
|
|
memcpy (htab->elf.splt->contents, elf_s390_plt_pic_first_entry,
|
|
PLT_FIRST_ENTRY_SIZE);
|
|
}
|
|
else
|
|
{
|
|
memcpy (htab->elf.splt->contents, elf_s390_plt_first_entry,
|
|
PLT_FIRST_ENTRY_SIZE);
|
|
bfd_put_32 (output_bfd,
|
|
htab->elf.sgotplt->output_section->vma
|
|
+ htab->elf.sgotplt->output_offset,
|
|
htab->elf.splt->contents + 24);
|
|
}
|
|
elf_section_data (htab->elf.splt->output_section)
|
|
->this_hdr.sh_entsize = 4;
|
|
}
|
|
|
|
}
|
|
|
|
if (htab->elf.sgotplt)
|
|
{
|
|
/* Fill in the first three entries in the global offset table. */
|
|
if (htab->elf.sgotplt->size > 0)
|
|
{
|
|
bfd_put_32 (output_bfd,
|
|
(sdyn == NULL ? (bfd_vma) 0
|
|
: sdyn->output_section->vma + sdyn->output_offset),
|
|
htab->elf.sgotplt->contents);
|
|
/* One entry for shared object struct ptr. */
|
|
bfd_put_32 (output_bfd, (bfd_vma) 0, htab->elf.sgotplt->contents + 4);
|
|
/* One entry for _dl_runtime_resolve. */
|
|
bfd_put_32 (output_bfd, (bfd_vma) 0, htab->elf.sgotplt->contents + 8);
|
|
}
|
|
|
|
elf_section_data (htab->elf.sgotplt->output_section)
|
|
->this_hdr.sh_entsize = 4;
|
|
}
|
|
return TRUE;
|
|
}
|
|
|
|
static bfd_boolean
|
|
elf_s390_grok_prstatus (abfd, note)
|
|
bfd * abfd;
|
|
Elf_Internal_Note * note;
|
|
{
|
|
int offset;
|
|
unsigned int size;
|
|
|
|
switch (note->descsz)
|
|
{
|
|
default:
|
|
return FALSE;
|
|
|
|
case 224: /* S/390 Linux. */
|
|
/* pr_cursig */
|
|
elf_tdata (abfd)->core_signal = bfd_get_16 (abfd, note->descdata + 12);
|
|
|
|
/* pr_pid */
|
|
elf_tdata (abfd)->core_lwpid = bfd_get_32 (abfd, note->descdata + 24);
|
|
|
|
/* pr_reg */
|
|
offset = 72;
|
|
size = 144;
|
|
break;
|
|
}
|
|
|
|
/* Make a ".reg/999" section. */
|
|
return _bfd_elfcore_make_pseudosection (abfd, ".reg",
|
|
size, note->descpos + offset);
|
|
}
|
|
|
|
/* Return address for Ith PLT stub in section PLT, for relocation REL
|
|
or (bfd_vma) -1 if it should not be included. */
|
|
|
|
static bfd_vma
|
|
elf_s390_plt_sym_val (bfd_vma i, const asection *plt,
|
|
const arelent *rel ATTRIBUTE_UNUSED)
|
|
{
|
|
return plt->vma + PLT_FIRST_ENTRY_SIZE + i * PLT_ENTRY_SIZE;
|
|
}
|
|
|
|
static bfd_boolean
|
|
elf32_s390_merge_private_bfd_data (bfd *ibfd, bfd *obfd)
|
|
{
|
|
elf_elfheader (obfd)->e_flags |= elf_elfheader (ibfd)->e_flags;
|
|
return TRUE;
|
|
}
|
|
|
|
|
|
#define TARGET_BIG_SYM bfd_elf32_s390_vec
|
|
#define TARGET_BIG_NAME "elf32-s390"
|
|
#define ELF_ARCH bfd_arch_s390
|
|
#define ELF_TARGET_ID S390_ELF_DATA
|
|
#define ELF_MACHINE_CODE EM_S390
|
|
#define ELF_MACHINE_ALT1 EM_S390_OLD
|
|
#define ELF_MAXPAGESIZE 0x1000
|
|
|
|
#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 12
|
|
#define elf_backend_rela_normal 1
|
|
|
|
#define elf_info_to_howto elf_s390_info_to_howto
|
|
|
|
#define bfd_elf32_bfd_is_local_label_name elf_s390_is_local_label_name
|
|
#define bfd_elf32_bfd_link_hash_table_create elf_s390_link_hash_table_create
|
|
#define bfd_elf32_bfd_reloc_type_lookup elf_s390_reloc_type_lookup
|
|
#define bfd_elf32_bfd_reloc_name_lookup elf_s390_reloc_name_lookup
|
|
|
|
#define bfd_elf32_bfd_merge_private_bfd_data elf32_s390_merge_private_bfd_data
|
|
|
|
#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_init_index_section _bfd_elf_init_1_index_section
|
|
#define elf_backend_reloc_type_class elf_s390_reloc_type_class
|
|
#define elf_backend_grok_prstatus elf_s390_grok_prstatus
|
|
#define elf_backend_plt_sym_val elf_s390_plt_sym_val
|
|
|
|
#define bfd_elf32_mkobject elf_s390_mkobject
|
|
#define elf_backend_object_p elf_s390_object_p
|
|
|
|
#include "elf32-target.h"
|