diff options
Diffstat (limited to 'binutils-2.24/bfd/elf32-vax.c')
| -rw-r--r-- | binutils-2.24/bfd/elf32-vax.c | 2065 |
1 files changed, 0 insertions, 2065 deletions
diff --git a/binutils-2.24/bfd/elf32-vax.c b/binutils-2.24/bfd/elf32-vax.c deleted file mode 100644 index c6a8f818..00000000 --- a/binutils-2.24/bfd/elf32-vax.c +++ /dev/null @@ -1,2065 +0,0 @@ -/* VAX series support for 32-bit ELF - Copyright 1993, 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, - 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012 - Free Software Foundation, Inc. - Contributed by Matt Thomas <matt@3am-software.com>. - - This file is part of BFD, the Binary File Descriptor library. - - This program is free software; you can redistribute it and/or modify - it under the terms of the GNU General Public License as published by - the Free Software Foundation; either version 3 of the License, or - (at your option) any later version. - - This program is distributed in the hope that it will be useful, - but WITHOUT ANY WARRANTY; without even the implied warranty of - MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - GNU General Public License for more details. - - You should have received a copy of the GNU General Public License - along with this program; if not, write to the Free Software - Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, - MA 02110-1301, USA. */ - -#include "sysdep.h" -#include "bfd.h" -#include "bfdlink.h" -#include "libbfd.h" -#include "elf-bfd.h" -#include "elf/vax.h" - -static reloc_howto_type *reloc_type_lookup (bfd *, bfd_reloc_code_real_type); -static void rtype_to_howto (bfd *, arelent *, Elf_Internal_Rela *); -static struct bfd_hash_entry *elf_vax_link_hash_newfunc (struct bfd_hash_entry *, - struct bfd_hash_table *, - const char *); -static struct bfd_link_hash_table *elf_vax_link_hash_table_create (bfd *); -static bfd_boolean elf_vax_check_relocs (bfd *, struct bfd_link_info *, - asection *, const Elf_Internal_Rela *); -static bfd_boolean elf_vax_adjust_dynamic_symbol (struct bfd_link_info *, - struct elf_link_hash_entry *); -static bfd_boolean elf_vax_size_dynamic_sections (bfd *, struct bfd_link_info *); -static bfd_boolean elf_vax_relocate_section (bfd *, struct bfd_link_info *, - bfd *, asection *, bfd_byte *, - Elf_Internal_Rela *, - Elf_Internal_Sym *, asection **); -static bfd_boolean elf_vax_finish_dynamic_symbol (bfd *, struct bfd_link_info *, - struct elf_link_hash_entry *, - Elf_Internal_Sym *); -static bfd_boolean elf_vax_finish_dynamic_sections (bfd *, - struct bfd_link_info *); -static bfd_vma elf_vax_plt_sym_val (bfd_vma, const asection *, - const arelent *); - -static bfd_boolean elf32_vax_set_private_flags (bfd *, flagword); -static bfd_boolean elf32_vax_merge_private_bfd_data (bfd *, bfd *); -static bfd_boolean elf32_vax_print_private_bfd_data (bfd *, void *); - -static reloc_howto_type howto_table[] = { - HOWTO (R_VAX_NONE, /* type */ - 0, /* rightshift */ - 0, /* size (0 = byte, 1 = short, 2 = long) */ - 0, /* bitsize */ - FALSE, /* pc_relative */ - 0, /* bitpos */ - complain_overflow_dont, /* complain_on_overflow */ - bfd_elf_generic_reloc, /* special_function */ - "R_VAX_NONE", /* name */ - FALSE, /* partial_inplace */ - 0, /* src_mask */ - 0x00000000, /* dst_mask */ - FALSE), /* pcrel_offset */ - - HOWTO (R_VAX_32, /* type */ - 0, /* rightshift */ - 2, /* size (0 = byte, 1 = short, 2 = long) */ - 32, /* bitsize */ - FALSE, /* pc_relative */ - 0, /* bitpos */ - complain_overflow_bitfield, /* complain_on_overflow */ - bfd_elf_generic_reloc, /* special_function */ - "R_VAX_32", /* name */ - FALSE, /* partial_inplace */ - 0, /* src_mask */ - 0xffffffff, /* dst_mask */ - FALSE), /* pcrel_offset */ - - HOWTO (R_VAX_16, /* type */ - 0, /* rightshift */ - 1, /* size (0 = byte, 1 = short, 2 = long) */ - 16, /* bitsize */ - FALSE, /* pc_relative */ - 0, /* bitpos */ - complain_overflow_bitfield, /* complain_on_overflow */ - bfd_elf_generic_reloc, /* special_function */ - "R_VAX_16", /* name */ - FALSE, /* partial_inplace */ - 0, /* src_mask */ - 0x0000ffff, /* dst_mask */ - FALSE), /* pcrel_offset */ - - HOWTO (R_VAX_8, /* type */ - 0, /* rightshift */ - 0, /* size (0 = byte, 1 = short, 2 = long) */ - 8, /* bitsize */ - FALSE, /* pc_relative */ - 0, /* bitpos */ - complain_overflow_bitfield, /* complain_on_overflow */ - bfd_elf_generic_reloc, /* special_function */ - "R_VAX_8", /* name */ - FALSE, /* partial_inplace */ - 0, /* src_mask */ - 0x000000ff, /* dst_mask */ - FALSE), /* pcrel_offset */ - - HOWTO (R_VAX_PC32, /* type */ - 0, /* rightshift */ - 2, /* size (0 = byte, 1 = short, 2 = long) */ - 32, /* bitsize */ - TRUE, /* pc_relative */ - 0, /* bitpos */ - complain_overflow_bitfield, /* complain_on_overflow */ - bfd_elf_generic_reloc, /* special_function */ - "R_VAX_PC32", /* name */ - FALSE, /* partial_inplace */ - 0, /* src_mask */ - 0xffffffff, /* dst_mask */ - TRUE), /* pcrel_offset */ - - HOWTO (R_VAX_PC16, /* type */ - 0, /* rightshift */ - 1, /* size (0 = byte, 1 = short, 2 = long) */ - 16, /* bitsize */ - TRUE, /* pc_relative */ - 0, /* bitpos */ - complain_overflow_signed, /* complain_on_overflow */ - bfd_elf_generic_reloc, /* special_function */ - "R_VAX_PC16", /* name */ - FALSE, /* partial_inplace */ - 0, /* src_mask */ - 0x0000ffff, /* dst_mask */ - TRUE), /* pcrel_offset */ - - HOWTO (R_VAX_PC8, /* type */ - 0, /* rightshift */ - 0, /* size (0 = byte, 1 = short, 2 = long) */ - 8, /* bitsize */ - TRUE, /* pc_relative */ - 0, /* bitpos */ - complain_overflow_signed, /* complain_on_overflow */ - bfd_elf_generic_reloc, /* special_function */ - "R_VAX_PC8", /* name */ - FALSE, /* partial_inplace */ - 0, /* src_mask */ - 0x000000ff, /* dst_mask */ - TRUE), /* pcrel_offset */ - - HOWTO (R_VAX_GOT32, /* type */ - 0, /* rightshift */ - 2, /* size (0 = byte, 1 = short, 2 = long) */ - 32, /* bitsize */ - TRUE, /* pc_relative */ - 0, /* bitpos */ - complain_overflow_bitfield, /* complain_on_overflow */ - bfd_elf_generic_reloc, /* special_function */ - "R_VAX_GOT32", /* name */ - FALSE, /* partial_inplace */ - 0, /* src_mask */ - 0xffffffff, /* dst_mask */ - TRUE), /* pcrel_offset */ - - EMPTY_HOWTO (-1), - EMPTY_HOWTO (-1), - EMPTY_HOWTO (-1), - EMPTY_HOWTO (-1), - EMPTY_HOWTO (-1), - - HOWTO (R_VAX_PLT32, /* type */ - 0, /* rightshift */ - 2, /* size (0 = byte, 1 = short, 2 = long) */ - 32, /* bitsize */ - TRUE, /* pc_relative */ - 0, /* bitpos */ - complain_overflow_bitfield, /* complain_on_overflow */ - bfd_elf_generic_reloc, /* special_function */ - "R_VAX_PLT32", /* name */ - FALSE, /* partial_inplace */ - 0, /* src_mask */ - 0xffffffff, /* dst_mask */ - TRUE), /* pcrel_offset */ - - EMPTY_HOWTO (-1), - EMPTY_HOWTO (-1), - EMPTY_HOWTO (-1), - EMPTY_HOWTO (-1), - EMPTY_HOWTO (-1), - - HOWTO (R_VAX_COPY, /* type */ - 0, /* rightshift */ - 0, /* size (0 = byte, 1 = short, 2 = long) */ - 0, /* bitsize */ - FALSE, /* pc_relative */ - 0, /* bitpos */ - complain_overflow_dont, /* complain_on_overflow */ - bfd_elf_generic_reloc, /* special_function */ - "R_VAX_COPY", /* name */ - FALSE, /* partial_inplace */ - 0, /* src_mask */ - 0xffffffff, /* dst_mask */ - FALSE), /* pcrel_offset */ - - HOWTO (R_VAX_GLOB_DAT, /* type */ - 0, /* rightshift */ - 2, /* size (0 = byte, 1 = short, 2 = long) */ - 32, /* bitsize */ - FALSE, /* pc_relative */ - 0, /* bitpos */ - complain_overflow_dont, /* complain_on_overflow */ - bfd_elf_generic_reloc, /* special_function */ - "R_VAX_GLOB_DAT", /* name */ - FALSE, /* partial_inplace */ - 0, /* src_mask */ - 0xffffffff, /* dst_mask */ - FALSE), /* pcrel_offset */ - - HOWTO (R_VAX_JMP_SLOT, /* type */ - 0, /* rightshift */ - 2, /* size (0 = byte, 1 = short, 2 = long) */ - 32, /* bitsize */ - FALSE, /* pc_relative */ - 0, /* bitpos */ - complain_overflow_dont, /* complain_on_overflow */ - bfd_elf_generic_reloc, /* special_function */ - "R_VAX_JMP_SLOT", /* name */ - FALSE, /* partial_inplace */ - 0, /* src_mask */ - 0xffffffff, /* dst_mask */ - FALSE), /* pcrel_offset */ - - HOWTO (R_VAX_RELATIVE, /* type */ - 0, /* rightshift */ - 2, /* size (0 = byte, 1 = short, 2 = long) */ - 32, /* bitsize */ - FALSE, /* pc_relative */ - 0, /* bitpos */ - complain_overflow_dont, /* complain_on_overflow */ - bfd_elf_generic_reloc, /* special_function */ - "R_VAX_RELATIVE", /* name */ - FALSE, /* partial_inplace */ - 0, /* src_mask */ - 0xffffffff, /* dst_mask */ - FALSE), /* pcrel_offset */ - - /* GNU extension to record C++ vtable hierarchy */ - HOWTO (R_VAX_GNU_VTINHERIT, /* type */ - 0, /* rightshift */ - 2, /* size (0 = byte, 1 = short, 2 = long) */ - 0, /* bitsize */ - FALSE, /* pc_relative */ - 0, /* bitpos */ - complain_overflow_dont, /* complain_on_overflow */ - NULL, /* special_function */ - "R_VAX_GNU_VTINHERIT", /* name */ - FALSE, /* partial_inplace */ - 0, /* src_mask */ - 0, /* dst_mask */ - FALSE), /* pcrel_offset */ - - /* GNU extension to record C++ vtable member usage */ - HOWTO (R_VAX_GNU_VTENTRY, /* type */ - 0, /* rightshift */ - 2, /* size (0 = byte, 1 = short, 2 = long) */ - 0, /* bitsize */ - FALSE, /* pc_relative */ - 0, /* bitpos */ - complain_overflow_dont, /* complain_on_overflow */ - _bfd_elf_rel_vtable_reloc_fn, /* special_function */ - "R_VAX_GNU_VTENTRY", /* name */ - FALSE, /* partial_inplace */ - 0, /* src_mask */ - 0, /* dst_mask */ - FALSE), /* pcrel_offset */ -}; - -static void -rtype_to_howto (bfd *abfd ATTRIBUTE_UNUSED, arelent *cache_ptr, - Elf_Internal_Rela *dst) -{ - BFD_ASSERT (ELF32_R_TYPE(dst->r_info) < (unsigned int) R_VAX_max); - cache_ptr->howto = &howto_table[ELF32_R_TYPE(dst->r_info)]; -} - -#define elf_info_to_howto rtype_to_howto - -static const struct -{ - bfd_reloc_code_real_type bfd_val; - int elf_val; -} reloc_map[] = { - { BFD_RELOC_NONE, R_VAX_NONE }, - { BFD_RELOC_32, R_VAX_32 }, - { BFD_RELOC_16, R_VAX_16 }, - { BFD_RELOC_8, R_VAX_8 }, - { BFD_RELOC_32_PCREL, R_VAX_PC32 }, - { BFD_RELOC_16_PCREL, R_VAX_PC16 }, - { BFD_RELOC_8_PCREL, R_VAX_PC8 }, - { BFD_RELOC_32_GOT_PCREL, R_VAX_GOT32 }, - { BFD_RELOC_32_PLT_PCREL, R_VAX_PLT32 }, - { BFD_RELOC_NONE, R_VAX_COPY }, - { BFD_RELOC_VAX_GLOB_DAT, R_VAX_GLOB_DAT }, - { BFD_RELOC_VAX_JMP_SLOT, R_VAX_JMP_SLOT }, - { BFD_RELOC_VAX_RELATIVE, R_VAX_RELATIVE }, - { BFD_RELOC_CTOR, R_VAX_32 }, - { BFD_RELOC_VTABLE_INHERIT, R_VAX_GNU_VTINHERIT }, - { BFD_RELOC_VTABLE_ENTRY, R_VAX_GNU_VTENTRY }, -}; - -static reloc_howto_type * -reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED, bfd_reloc_code_real_type code) -{ - unsigned int i; - for (i = 0; i < sizeof (reloc_map) / sizeof (reloc_map[0]); i++) - { - if (reloc_map[i].bfd_val == code) - return &howto_table[reloc_map[i].elf_val]; - } - return 0; -} - -static reloc_howto_type * -reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED, - const char *r_name) -{ - unsigned int i; - - for (i = 0; i < sizeof (howto_table) / sizeof (howto_table[0]); i++) - if (howto_table[i].name != NULL - && strcasecmp (howto_table[i].name, r_name) == 0) - return &howto_table[i]; - - return NULL; -} - -#define bfd_elf32_bfd_reloc_type_lookup reloc_type_lookup -#define bfd_elf32_bfd_reloc_name_lookup reloc_name_lookup -#define ELF_ARCH bfd_arch_vax -/* end code generated by elf.el */ - -/* Functions for the VAX ELF linker. */ - -/* The name of the dynamic interpreter. This is put in the .interp - section. */ - -#define ELF_DYNAMIC_INTERPRETER "/usr/libexec/ld.elf_so" - -/* The size in bytes of an entry in the procedure linkage table. */ - -#define PLT_ENTRY_SIZE 12 - -/* The first entry in a procedure linkage table looks like this. See - the SVR4 ABI VAX supplement to see how this works. */ - -static const bfd_byte elf_vax_plt0_entry[PLT_ENTRY_SIZE] = -{ - 0xdd, 0xef, /* pushl l^ */ - 0, 0, 0, 0, /* offset to .plt.got + 4 */ - 0x17, 0xff, /* jmp @L^(pc) */ - 0, 0, 0, 0, /* offset to .plt.got + 8 */ -}; - -/* Subsequent entries in a procedure linkage table look like this. */ - -static const bfd_byte elf_vax_plt_entry[PLT_ENTRY_SIZE] = -{ - 0xfc, 0x0f, /* .word ^M<r11:r2> */ - 0x16, 0xef, /* jsb L^(pc) */ - 0, 0, 0, 0, /* replaced with offset to start of .plt */ - 0, 0, 0, 0, /* index into .rela.plt */ -}; - -/* The VAX linker needs to keep track of the number of relocs that it - decides to copy in check_relocs for each symbol. This is so that it - can discard PC relative relocs if it doesn't need them when linking - with -Bsymbolic. We store the information in a field extending the - regular ELF linker hash table. */ - -/* This structure keeps track of the number of PC relative relocs we have - copied for a given symbol. */ - -struct elf_vax_pcrel_relocs_copied -{ - /* Next section. */ - struct elf_vax_pcrel_relocs_copied *next; - /* A section in dynobj. */ - asection *section; - /* Number of relocs copied in this section. */ - bfd_size_type count; -}; - -/* VAX ELF linker hash entry. */ - -struct elf_vax_link_hash_entry -{ - struct elf_link_hash_entry root; - - /* Number of PC relative relocs copied for this symbol. */ - struct elf_vax_pcrel_relocs_copied *pcrel_relocs_copied; - - bfd_vma got_addend; -}; - -/* Declare this now that the above structures are defined. */ - -static bfd_boolean elf_vax_discard_copies (struct elf_vax_link_hash_entry *, - void *); - -/* Declare this now that the above structures are defined. */ - -static bfd_boolean elf_vax_instantiate_got_entries (struct elf_link_hash_entry *, - void *); - -/* Traverse an VAX ELF linker hash table. */ - -#define elf_vax_link_hash_traverse(table, func, info) \ - (elf_link_hash_traverse \ - ((table), \ - (bfd_boolean (*) (struct elf_link_hash_entry *, void *)) (func), \ - (info))) - -/* Create an entry in an VAX ELF linker hash table. */ - -static struct bfd_hash_entry * -elf_vax_link_hash_newfunc (struct bfd_hash_entry *entry, - struct bfd_hash_table *table, - const char *string) -{ - struct elf_vax_link_hash_entry *ret = - (struct elf_vax_link_hash_entry *) entry; - - /* Allocate the structure if it has not already been allocated by a - subclass. */ - if (ret == NULL) - ret = ((struct elf_vax_link_hash_entry *) - bfd_hash_allocate (table, - sizeof (struct elf_vax_link_hash_entry))); - if (ret == NULL) - return (struct bfd_hash_entry *) ret; - - /* Call the allocation method of the superclass. */ - ret = ((struct elf_vax_link_hash_entry *) - _bfd_elf_link_hash_newfunc ((struct bfd_hash_entry *) ret, - table, string)); - if (ret != NULL) - { - ret->pcrel_relocs_copied = NULL; - } - - return (struct bfd_hash_entry *) ret; -} - -/* Create an VAX ELF linker hash table. */ - -static struct bfd_link_hash_table * -elf_vax_link_hash_table_create (bfd *abfd) -{ - struct elf_link_hash_table *ret; - bfd_size_type amt = sizeof (struct elf_link_hash_table); - - ret = bfd_zmalloc (amt); - if (ret == NULL) - return NULL; - - if (!_bfd_elf_link_hash_table_init (ret, abfd, - elf_vax_link_hash_newfunc, - sizeof (struct elf_vax_link_hash_entry), - GENERIC_ELF_DATA)) - { - free (ret); - return NULL; - } - - return &ret->root; -} - -/* Keep vax-specific flags in the ELF header */ -static bfd_boolean -elf32_vax_set_private_flags (bfd *abfd, flagword flags) -{ - elf_elfheader (abfd)->e_flags = flags; - elf_flags_init (abfd) = TRUE; - return TRUE; -} - -/* Merge backend specific data from an object file to the output - object file when linking. */ -static bfd_boolean -elf32_vax_merge_private_bfd_data (bfd *ibfd, bfd *obfd) -{ - flagword in_flags; - - if ( bfd_get_flavour (ibfd) != bfd_target_elf_flavour - || bfd_get_flavour (obfd) != bfd_target_elf_flavour) - return TRUE; - - in_flags = elf_elfheader (ibfd)->e_flags; - - if (!elf_flags_init (obfd)) - { - elf_flags_init (obfd) = TRUE; - elf_elfheader (obfd)->e_flags = in_flags; - } - - return TRUE; -} - -/* Display the flags field */ -static bfd_boolean -elf32_vax_print_private_bfd_data (bfd *abfd, void * ptr) -{ - FILE *file = (FILE *) ptr; - - BFD_ASSERT (abfd != NULL && ptr != NULL); - - /* Print normal ELF private data. */ - _bfd_elf_print_private_bfd_data (abfd, ptr); - - /* Ignore init flag - it may not be set, despite the flags field containing valid data. */ - - /* xgettext:c-format */ - fprintf (file, _("private flags = %lx:"), elf_elfheader (abfd)->e_flags); - - if (elf_elfheader (abfd)->e_flags & EF_VAX_NONPIC) - fprintf (file, _(" [nonpic]")); - - if (elf_elfheader (abfd)->e_flags & EF_VAX_DFLOAT) - fprintf (file, _(" [d-float]")); - - if (elf_elfheader (abfd)->e_flags & EF_VAX_GFLOAT) - fprintf (file, _(" [g-float]")); - - fputc ('\n', file); - - return TRUE; -} -/* 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_vax_check_relocs (bfd *abfd, struct bfd_link_info *info, asection *sec, - const Elf_Internal_Rela *relocs) -{ - bfd *dynobj; - Elf_Internal_Shdr *symtab_hdr; - struct elf_link_hash_entry **sym_hashes; - const Elf_Internal_Rela *rel; - const Elf_Internal_Rela *rel_end; - asection *sgot; - asection *srelgot; - asection *sreloc; - - if (info->relocatable) - return TRUE; - - dynobj = elf_hash_table (info)->dynobj; - symtab_hdr = &elf_tdata (abfd)->symtab_hdr; - sym_hashes = elf_sym_hashes (abfd); - - sgot = NULL; - srelgot = NULL; - sreloc = NULL; - - rel_end = relocs + sec->reloc_count; - for (rel = relocs; rel < rel_end; rel++) - { - unsigned long r_symndx; - struct elf_link_hash_entry *h; - - r_symndx = ELF32_R_SYM (rel->r_info); - - 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; - - /* PR15323, ref flags aren't set for references in the same - object. */ - h->root.non_ir_ref = 1; - } - - switch (ELF32_R_TYPE (rel->r_info)) - { - case R_VAX_GOT32: - BFD_ASSERT (h != NULL); - - /* If this is a local symbol, we resolve it directly without - creating a global offset table entry. */ - if (h->forced_local - || h == elf_hash_table (info)->hgot - || h == elf_hash_table (info)->hplt) - break; - - /* This symbol requires a global offset table entry. */ - - if (dynobj == NULL) - { - /* Create the .got section. */ - elf_hash_table (info)->dynobj = dynobj = abfd; - if (!_bfd_elf_create_got_section (dynobj, info)) - return FALSE; - } - - if (sgot == NULL) - { - sgot = bfd_get_linker_section (dynobj, ".got"); - BFD_ASSERT (sgot != NULL); - } - - if (srelgot == NULL - && (h != NULL || info->shared)) - { - srelgot = bfd_get_linker_section (dynobj, ".rela.got"); - if (srelgot == NULL) - { - flagword flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS - | SEC_IN_MEMORY | SEC_LINKER_CREATED - | SEC_READONLY); - - srelgot = bfd_make_section_anyway_with_flags (dynobj, - ".rela.got", - flags); - if (srelgot == NULL - || !bfd_set_section_alignment (dynobj, srelgot, 2)) - return FALSE; - } - } - - if (h != NULL) - { - struct elf_vax_link_hash_entry *eh; - - eh = (struct elf_vax_link_hash_entry *) h; - if (h->got.refcount == -1) - { - h->got.refcount = 1; - eh->got_addend = rel->r_addend; - } - else - { - h->got.refcount++; - if (eh->got_addend != (bfd_vma) rel->r_addend) - (*_bfd_error_handler) - (_("%s: warning: GOT addend of %ld to `%s' does" - " not match previous GOT addend of %ld"), - bfd_get_filename (abfd), rel->r_addend, - h->root.root.string, - eh->got_addend); - - } - } - break; - - case R_VAX_PLT32: - /* 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. */ - BFD_ASSERT (h != NULL); - - /* If this is a local symbol, we resolve it directly without - creating a procedure linkage table entry. */ - if (h->forced_local) - break; - - h->needs_plt = 1; - if (h->plt.refcount == -1) - h->plt.refcount = 1; - else - h->plt.refcount++; - break; - - case R_VAX_PC8: - case R_VAX_PC16: - case R_VAX_PC32: - /* If we are creating a shared library and this is not a local - symbol, we need to copy the reloc into the shared library. - However when linking with -Bsymbolic and this is a global - symbol which is defined in an object we are including in the - link (i.e., DEF_REGULAR is set), then we can resolve the - reloc directly. 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). We account for that - possibility below by storing information in the - pcrel_relocs_copied field of the hash table entry. */ - if (!(info->shared - && (sec->flags & SEC_ALLOC) != 0 - && h != NULL - && (!info->symbolic - || !h->def_regular))) - { - if (h != NULL - && ELF_ST_VISIBILITY (h->other) == STV_DEFAULT - && !h->forced_local) - { - /* Make sure a plt entry is created for this symbol if - it turns out to be a function defined by a dynamic - object. */ - if (h->plt.refcount == -1) - h->plt.refcount = 1; - else - h->plt.refcount++; - } - break; - } - /* If this is a local symbol, we can resolve it directly. */ - if (h != NULL - && (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT - || h->forced_local)) - break; - - /* Fall through. */ - case R_VAX_8: - case R_VAX_16: - case R_VAX_32: - if (h != NULL && ELF_ST_VISIBILITY (h->other) == STV_DEFAULT) - { - /* Make sure a plt entry is created for this symbol if it - turns out to be a function defined by a dynamic object. */ - if (h->plt.refcount == -1) - h->plt.refcount = 1; - else - h->plt.refcount++; - } - - /* If we are creating a shared library, we need to copy the - reloc into the shared library. */ - if (info->shared - && (sec->flags & SEC_ALLOC) != 0) - { - /* When creating a shared object, we must copy these - reloc types into the output file. We create a reloc - section in dynobj and make room for this reloc. */ - if (sreloc == NULL) - { - sreloc = _bfd_elf_make_dynamic_reloc_section - (sec, dynobj, 2, abfd, /*rela?*/ TRUE); - - if (sreloc == NULL) - return FALSE; - - if (sec->flags & SEC_READONLY) - info->flags |= DF_TEXTREL; - } - - sreloc->size += sizeof (Elf32_External_Rela); - - /* If we are linking with -Bsymbolic, we count the number of - PC relative relocations we have entered for this symbol, - so that we can discard them again if the symbol is later - defined by a regular object. Note that this function is - only called if we are using a vaxelf linker hash table, - which means that h is really a pointer to an - elf_vax_link_hash_entry. */ - if ((ELF32_R_TYPE (rel->r_info) == R_VAX_PC8 - || ELF32_R_TYPE (rel->r_info) == R_VAX_PC16 - || ELF32_R_TYPE (rel->r_info) == R_VAX_PC32) - && info->symbolic) - { - struct elf_vax_link_hash_entry *eh; - struct elf_vax_pcrel_relocs_copied *p; - - eh = (struct elf_vax_link_hash_entry *) h; - - for (p = eh->pcrel_relocs_copied; p != NULL; p = p->next) - if (p->section == sreloc) - break; - - if (p == NULL) - { - p = ((struct elf_vax_pcrel_relocs_copied *) - bfd_alloc (dynobj, (bfd_size_type) sizeof *p)); - if (p == NULL) - return FALSE; - p->next = eh->pcrel_relocs_copied; - eh->pcrel_relocs_copied = p; - p->section = sreloc; - p->count = 0; - } - - ++p->count; - } - } - - break; - - /* This relocation describes the C++ object vtable hierarchy. - Reconstruct it for later use during GC. */ - case R_VAX_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_VAX_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_vax_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_VAX_GNU_VTINHERIT: - case R_VAX_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_vax_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; - const Elf_Internal_Rela *rel, *relend; - bfd *dynobj; - - if (info->relocatable) - return TRUE; - - dynobj = elf_hash_table (info)->dynobj; - if (dynobj == NULL) - return TRUE; - - symtab_hdr = &elf_tdata (abfd)->symtab_hdr; - sym_hashes = elf_sym_hashes (abfd); - - relend = relocs + sec->reloc_count; - for (rel = relocs; rel < relend; rel++) - { - unsigned long r_symndx; - struct elf_link_hash_entry *h = NULL; - - r_symndx = ELF32_R_SYM (rel->r_info); - if (r_symndx >= symtab_hdr->sh_info) - { - 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; - } - - switch (ELF32_R_TYPE (rel->r_info)) - { - case R_VAX_GOT32: - if (h != NULL && h->got.refcount > 0) - --h->got.refcount; - break; - - case R_VAX_PLT32: - case R_VAX_PC8: - case R_VAX_PC16: - case R_VAX_PC32: - case R_VAX_8: - case R_VAX_16: - case R_VAX_32: - if (h != NULL && h->plt.refcount > 0) - --h->plt.refcount; - break; - - default: - break; - } - } - - return TRUE; -} - -/* 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_vax_adjust_dynamic_symbol (struct bfd_link_info *info, - struct elf_link_hash_entry *h) -{ - bfd *dynobj; - asection *s; - - dynobj = elf_hash_table (info)->dynobj; - - /* Make sure we know what is going on here. */ - BFD_ASSERT (dynobj != NULL - && (h->needs_plt - || h->u.weakdef != NULL - || (h->def_dynamic - && h->ref_regular - && !h->def_regular))); - - /* If this is a function, put it in the procedure linkage table. We - will fill in the contents of the procedure linkage table later, - when we know the address of the .got section. */ - 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 PLTxx 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 PCxx reloc instead. */ - h->plt.offset = (bfd_vma) -1; - h->needs_plt = 0; - return TRUE; - } - - s = bfd_get_linker_section (dynobj, ".plt"); - BFD_ASSERT (s != NULL); - - /* If this is the first .plt entry, make room for the special - first entry. */ - if (s->size == 0) - { - s->size += PLT_ENTRY_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 = s->size; - } - - h->plt.offset = s->size; - - /* 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. */ - - s = bfd_get_linker_section (dynobj, ".got.plt"); - BFD_ASSERT (s != NULL); - s->size += 4; - - /* We also need to make an entry in the .rela.plt section. */ - - s = bfd_get_linker_section (dynobj, ".rela.plt"); - BFD_ASSERT (s != NULL); - s->size += sizeof (Elf32_External_Rela); - - return TRUE; - } - - /* Reinitialize the plt offset now that it is not used as a reference - count any more. */ - 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; - 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; - - /* 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. */ - - s = bfd_get_linker_section (dynobj, ".dynbss"); - BFD_ASSERT (s != NULL); - - /* We must generate a R_VAX_COPY reloc to tell the dynamic linker to - copy the initial value out of the dynamic object and into the - runtime process image. We need to remember the offset into the - .rela.bss section we are going to use. */ - if ((h->root.u.def.section->flags & SEC_ALLOC) != 0 && h->size != 0) - { - asection *srel; - - srel = bfd_get_linker_section (dynobj, ".rela.bss"); - BFD_ASSERT (srel != NULL); - srel->size += sizeof (Elf32_External_Rela); - h->needs_copy = 1; - } - - return _bfd_elf_adjust_dynamic_copy (h, s); -} - -/* This function is called via elf_link_hash_traverse. It resets GOT - and PLT (.GOT) reference counts back to -1 so normal PC32 relocation - will be done. */ - -static bfd_boolean -elf_vax_discard_got_entries (struct elf_link_hash_entry *h, - void *infoptr ATTRIBUTE_UNUSED) -{ - h->got.refcount = -1; - h->plt.refcount = -1; - - return TRUE; -} - -/* Discard unused dynamic data if this is a static link. */ - -static bfd_boolean -elf_vax_always_size_sections (bfd *output_bfd ATTRIBUTE_UNUSED, - struct bfd_link_info *info) -{ - bfd *dynobj; - asection *s; - - dynobj = elf_hash_table (info)->dynobj; - - if (dynobj && !elf_hash_table (info)->dynamic_sections_created) - { - /* We may have created entries in the .rela.got and .got sections. - However, if we are not creating the dynamic sections, we will - not actually use these entries. Reset the size of .rela.got - and .got, which will cause them to get stripped from the output - file below. */ - s = bfd_get_linker_section (dynobj, ".rela.got"); - if (s != NULL) - s->size = 0; - s = bfd_get_linker_section (dynobj, ".got.plt"); - if (s != NULL) - s->size = 0; - s = bfd_get_linker_section (dynobj, ".got"); - if (s != NULL) - s->size = 0; - } - - /* If this is a static link, we need to discard all the got entries we've - recorded. */ - if (!dynobj || !elf_hash_table (info)->dynamic_sections_created) - elf_link_hash_traverse (elf_hash_table (info), - elf_vax_discard_got_entries, - info); - - return TRUE; -} - -/* Set the sizes of the dynamic sections. */ - -static bfd_boolean -elf_vax_size_dynamic_sections (bfd *output_bfd, struct bfd_link_info *info) -{ - bfd *dynobj; - asection *s; - bfd_boolean plt; - bfd_boolean relocs; - bfd_boolean reltext; - - dynobj = elf_hash_table (info)->dynobj; - BFD_ASSERT (dynobj != NULL); - - if (elf_hash_table (info)->dynamic_sections_created) - { - /* Set the contents of the .interp section to the interpreter. */ - if (info->executable) - { - s = bfd_get_linker_section (dynobj, ".interp"); - BFD_ASSERT (s != NULL); - s->size = sizeof ELF_DYNAMIC_INTERPRETER; - s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER; - } - } - - /* If this is a -Bsymbolic shared link, then we need to discard all PC - relative relocs against symbols defined in a regular object. We - allocated space for them in the check_relocs routine, but we will not - fill them in in the relocate_section routine. */ - if (info->shared && info->symbolic) - elf_vax_link_hash_traverse (elf_hash_table (info), - elf_vax_discard_copies, - NULL); - - /* If this is a -Bsymbolic shared link, we need to discard all the got - entries we've recorded. Otherwise, we need to instantiate (allocate - space for them). */ - elf_link_hash_traverse (elf_hash_table (info), - elf_vax_instantiate_got_entries, - info); - - /* The check_relocs and adjust_dynamic_symbol entry points have - determined the sizes of the various dynamic sections. Allocate - memory for them. */ - plt = FALSE; - relocs = FALSE; - reltext = FALSE; - for (s = dynobj->sections; s != NULL; s = s->next) - { - const char *name; - - if ((s->flags & SEC_LINKER_CREATED) == 0) - continue; - - /* It's OK to base decisions on the section name, because none - of the dynobj section names depend upon the input files. */ - name = bfd_get_section_name (dynobj, s); - - if (strcmp (name, ".plt") == 0) - { - /* Remember whether there is a PLT. */ - plt = s->size != 0; - } - else if (CONST_STRNEQ (name, ".rela")) - { - if (s->size != 0) - { - asection *target; - - /* Remember whether there are any reloc sections other - than .rela.plt. */ - if (strcmp (name, ".rela.plt") != 0) - { - const char *outname; - - relocs = TRUE; - - /* If this relocation section applies to a read only - section, then we probably need a DT_TEXTREL - entry. .rela.plt is actually associated with - .got.plt, which is never readonly. */ - outname = bfd_get_section_name (output_bfd, - s->output_section); - target = bfd_get_section_by_name (output_bfd, outname + 5); - if (target != NULL - && (target->flags & SEC_READONLY) != 0 - && (target->flags & SEC_ALLOC) != 0) - reltext = 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 if (! CONST_STRNEQ (name, ".got") - && strcmp (name, ".dynbss") != 0) - { - /* 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 mostly to handle .rela.bss and - .rela.plt. We must create both sections in - create_dynamic_sections, because they 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. */ - s->contents = (bfd_byte *) bfd_alloc (dynobj, s->size); - if (s->contents == NULL) - return FALSE; - } - - if (elf_hash_table (info)->dynamic_sections_created) - { - /* Add some entries to the .dynamic section. We fill in the - values later, in elf_vax_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->shared) - { - if (!add_dynamic_entry (DT_DEBUG, 0)) - return FALSE; - } - - if (plt) - { - 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 (reltext || (info->flags & DF_TEXTREL) != 0) - { - if (!add_dynamic_entry (DT_TEXTREL, 0)) - return FALSE; - } - } -#undef add_dynamic_entry - - return TRUE; -} - -/* This function is called via elf_vax_link_hash_traverse if we are - creating a shared object with -Bsymbolic. It discards the space - allocated to copy PC relative relocs against symbols which are defined - in regular objects. We allocated space for them in the check_relocs - routine, but we won't fill them in in the relocate_section routine. */ - -static bfd_boolean -elf_vax_discard_copies (struct elf_vax_link_hash_entry *h, - void * ignore ATTRIBUTE_UNUSED) -{ - struct elf_vax_pcrel_relocs_copied *s; - - /* We only discard relocs for symbols defined in a regular object. */ - if (!h->root.def_regular) - return TRUE; - - for (s = h->pcrel_relocs_copied; s != NULL; s = s->next) - s->section->size -= s->count * sizeof (Elf32_External_Rela); - - return TRUE; -} - -/* This function is called via elf_link_hash_traverse. It looks for - entries that have GOT or PLT (.GOT) references. If creating a shared - object with -Bsymbolic, or the symbol has been forced local, then it - resets the reference count back to -1 so normal PC32 relocation will - be done. Otherwise space in the .got and .rela.got will be reserved - for the symbol. */ - -static bfd_boolean -elf_vax_instantiate_got_entries (struct elf_link_hash_entry *h, void * infoptr) -{ - struct bfd_link_info *info = (struct bfd_link_info *) infoptr; - bfd *dynobj; - asection *sgot; - asection *srelgot; - - /* We don't care about non-GOT (and non-PLT) entries. */ - if (h->got.refcount <= 0 && h->plt.refcount <= 0) - return TRUE; - - dynobj = elf_hash_table (info)->dynobj; - BFD_ASSERT (dynobj != NULL); - - sgot = bfd_get_linker_section (dynobj, ".got"); - srelgot = bfd_get_linker_section (dynobj, ".rela.got"); - - if (SYMBOL_REFERENCES_LOCAL (info, h)) - { - h->got.refcount = -1; - h->plt.refcount = -1; - } - else if (h->got.refcount > 0) - { - /* Make sure this symbol is output as a dynamic symbol. */ - if (h->dynindx == -1) - { - if (!bfd_elf_link_record_dynamic_symbol (info, h)) - return FALSE; - } - - /* Allocate space in the .got and .rela.got sections. */ - sgot->size += 4; - srelgot->size += sizeof (Elf32_External_Rela); - } - - return TRUE; -} - -/* Relocate an VAX ELF section. */ - -static bfd_boolean -elf_vax_relocate_section (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) -{ - bfd *dynobj; - Elf_Internal_Shdr *symtab_hdr; - struct elf_link_hash_entry **sym_hashes; - bfd_vma plt_index; - bfd_vma got_offset; - asection *sgot; - asection *splt; - asection *sgotplt; - asection *sreloc; - Elf_Internal_Rela *rel; - Elf_Internal_Rela *relend; - - dynobj = elf_hash_table (info)->dynobj; - symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr; - sym_hashes = elf_sym_hashes (input_bfd); - - sgot = NULL; - splt = NULL; - sgotplt = NULL; - sreloc = NULL; - - rel = relocs; - relend = relocs + input_section->reloc_count; - for (; rel < relend; rel++) - { - 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 relocation; - bfd_reloc_status_type r; - - r_type = ELF32_R_TYPE (rel->r_info); - if (r_type < 0 || r_type >= (int) R_VAX_max) - { - bfd_set_error (bfd_error_bad_value); - return FALSE; - } - howto = howto_table + r_type; - - r_symndx = ELF32_R_SYM (rel->r_info); - h = NULL; - sym = NULL; - sec = NULL; - 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 unresolved_reloc; - bfd_boolean warned; - - RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel, - r_symndx, symtab_hdr, sym_hashes, - h, sec, relocation, - unresolved_reloc, warned); - - if ((h->root.type == bfd_link_hash_defined - || h->root.type == bfd_link_hash_defweak) - && ((r_type == R_VAX_PLT32 - && h->plt.offset != (bfd_vma) -1 - && !h->forced_local - && elf_hash_table (info)->dynamic_sections_created) - || (r_type == R_VAX_GOT32 - && h->got.offset != (bfd_vma) -1 - && !h->forced_local - && elf_hash_table (info)->dynamic_sections_created - && (! info->shared - || (! info->symbolic && h->dynindx != -1) - || !h->def_regular)) - || (info->shared - && ((! info->symbolic && h->dynindx != -1) - || !h->def_regular) - && ((input_section->flags & SEC_ALLOC) != 0 - /* DWARF will emit R_VAX_32 relocations in its - sections against symbols defined externally - in shared libraries. We can't do anything - with them here. */ - - || ((input_section->flags & SEC_DEBUGGING) != 0 - && h->def_dynamic)) - && (r_type == R_VAX_8 - || r_type == R_VAX_16 - || r_type == R_VAX_32)))) - /* In these cases, we don't need the relocation - value. We check specially because in some - obscure cases sec->output_section will be NULL. */ - relocation = 0; - } - - 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_VAX_GOT32: - /* Relocation is to the address of the entry for this symbol - in the global offset table. */ - - /* Resolve a GOTxx reloc against a local symbol directly, - without using the global offset table. */ - if (h == NULL - || h->got.offset == (bfd_vma) -1) - break; - - { - bfd_vma off; - - if (sgot == NULL) - { - sgot = bfd_get_linker_section (dynobj, ".got"); - BFD_ASSERT (sgot != NULL); - } - - off = h->got.offset; - BFD_ASSERT (off < sgot->size); - - bfd_put_32 (output_bfd, rel->r_addend, sgot->contents + off); - - relocation = sgot->output_offset + off; - /* The GOT relocation uses the addend. */ - rel->r_addend = 0; - - /* Change the reference to be indirect. */ - contents[rel->r_offset - 1] |= 0x10; - relocation += sgot->output_section->vma; - } - break; - - case R_VAX_PC32: - /* If we are creating an executable and the function this - reloc refers to is in a shared lib, then we made a PLT - entry for this symbol and need to handle the reloc like - a PLT reloc. */ - if (info->shared) - goto r_vax_pc32_shared; - /* Fall through. */ - case R_VAX_PLT32: - /* Relocation is to the entry for this symbol in the - procedure linkage table. */ - - /* Resolve a PLTxx reloc against a local symbol directly, - without using the procedure linkage table. */ - if (h == NULL - || h->plt.offset == (bfd_vma) -1) - break; - - if (splt == NULL) - { - splt = bfd_get_linker_section (dynobj, ".plt"); - BFD_ASSERT (splt != NULL); - } - - if (sgotplt == NULL) - { - sgotplt = bfd_get_linker_section (dynobj, ".got.plt"); - BFD_ASSERT (sgotplt != NULL); - } - - plt_index = h->plt.offset / PLT_ENTRY_SIZE - 1; - - /* Get the offset into the .got table of the entry that - corresponds to this function. Each .got entry is 4 bytes. - The first two are reserved. */ - got_offset = (plt_index + 3) * 4; - - /* We want the relocation to point into the .got.plt instead - of the plt itself. */ - relocation = (sgotplt->output_section->vma - + sgotplt->output_offset - + got_offset); - contents[rel->r_offset-1] |= 0x10; /* make indirect */ - if (rel->r_addend == 2) - { - h->plt.offset |= 1; - } - else if (rel->r_addend != 0) - (*_bfd_error_handler) - (_("%s: warning: PLT addend of %d to `%s' from %s section ignored"), - bfd_get_filename (input_bfd), rel->r_addend, - h->root.root.string, - bfd_get_section_name (input_bfd, input_section)); - rel->r_addend = 0; - - break; - - case R_VAX_PC8: - case R_VAX_PC16: - r_vax_pc32_shared: - if (h == NULL - || ELF_ST_VISIBILITY (h->other) != STV_DEFAULT - || h->forced_local) - break; - /* Fall through. */ - case R_VAX_8: - case R_VAX_16: - case R_VAX_32: - if (info->shared - && r_symndx != STN_UNDEF - && (input_section->flags & SEC_ALLOC) != 0 - && ((r_type != R_VAX_PC8 - && r_type != R_VAX_PC16 - && r_type != R_VAX_PC32) - || ((input_section->flags & SEC_CODE) - && (!info->symbolic - || (!h->def_regular && h->type != STT_SECTION))))) - { - Elf_Internal_Rela outrel; - bfd_byte *loc; - bfd_boolean skip, relocate; - - /* When generating a shared object, these relocations - are copied into the output file to be resolved at run - time. */ - if (sreloc == NULL) - { - sreloc = _bfd_elf_get_dynamic_reloc_section - (input_bfd, input_section, /*rela?*/ TRUE); - if (sreloc == NULL) - return FALSE; - } - - 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; - 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); - /* h->dynindx may be -1 if the symbol was marked to - become local. */ - else if (h != NULL - && ((! info->symbolic && h->dynindx != -1) - || !h->def_regular)) - { - BFD_ASSERT (h->dynindx != -1); - outrel.r_info = ELF32_R_INFO (h->dynindx, r_type); - outrel.r_addend = relocation + rel->r_addend; - } - else - { - if (r_type == R_VAX_32) - { - relocate = TRUE; - outrel.r_info = ELF32_R_INFO (0, R_VAX_RELATIVE); - BFD_ASSERT (bfd_get_signed_32 (input_bfd, - &contents[rel->r_offset]) == 0); - outrel.r_addend = relocation + rel->r_addend; - } - else - { - long indx; - - if (bfd_is_abs_section (sec)) - indx = 0; - else if (sec == NULL || sec->owner == NULL) - { - bfd_set_error (bfd_error_bad_value); - return FALSE; - } - else - { - asection *osec; - - /* We are turning this relocation into one - against a section symbol. It would be - proper to subtract the symbol's value, - osec->vma, from the emitted reloc addend, - but ld.so expects buggy relocs. */ - osec = sec->output_section; - indx = elf_section_data (osec)->dynindx; - if (indx == 0) - { - struct elf_link_hash_table *htab; - htab = elf_hash_table (info); - osec = htab->text_index_section; - indx = elf_section_data (osec)->dynindx; - } - BFD_ASSERT (indx != 0); - } - - outrel.r_info = ELF32_R_INFO (indx, r_type); - outrel.r_addend = relocation + rel->r_addend; - } - } - - if ((input_section->flags & SEC_CODE) != 0 - || (ELF32_R_TYPE (outrel.r_info) != R_VAX_32 - && ELF32_R_TYPE (outrel.r_info) != R_VAX_RELATIVE - && ELF32_R_TYPE (outrel.r_info) != R_VAX_COPY - && ELF32_R_TYPE (outrel.r_info) != R_VAX_JMP_SLOT - && ELF32_R_TYPE (outrel.r_info) != R_VAX_GLOB_DAT)) - { - if (h != NULL) - (*_bfd_error_handler) - (_("%s: warning: %s relocation against symbol `%s' from %s section"), - bfd_get_filename (input_bfd), howto->name, - h->root.root.string, - bfd_get_section_name (input_bfd, input_section)); - else - (*_bfd_error_handler) - (_("%s: warning: %s relocation to 0x%x from %s section"), - bfd_get_filename (input_bfd), howto->name, - outrel.r_addend, - bfd_get_section_name (input_bfd, input_section)); - } - loc = sreloc->contents; - loc += sreloc->reloc_count++ * sizeof (Elf32_External_Rela); - bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc); - - /* This reloc will be computed at runtime, so there's no - need to do anything now, except for R_VAX_32 - relocations that have been turned into - R_VAX_RELATIVE. */ - if (!relocate) - continue; - } - - break; - - case R_VAX_GNU_VTINHERIT: - case R_VAX_GNU_VTENTRY: - /* These are no-ops in the end. */ - continue; - - default: - break; - } - - /* VAX PCREL relocations are from the end of relocation, not the start. - So subtract the difference from the relocation amount since we can't - add it to the offset. */ - if (howto->pc_relative && howto->pcrel_offset) - relocation -= bfd_get_reloc_size(howto); - - r = _bfd_final_link_relocate (howto, input_bfd, input_section, - contents, rel->r_offset, - relocation, rel->r_addend); - - if (r != bfd_reloc_ok) - { - switch (r) - { - default: - case bfd_reloc_outofrange: - abort (); - case bfd_reloc_overflow: - { - const char *name; - - if (h != NULL) - name = NULL; - 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 (!(info->callbacks->reloc_overflow - (info, (h ? &h->root : NULL), name, howto->name, - (bfd_vma) 0, input_bfd, input_section, - rel->r_offset))) - return FALSE; - } - break; - } - } - } - - return TRUE; -} - -/* Finish up dynamic symbol handling. We set the contents of various - dynamic sections here. */ - -static bfd_boolean -elf_vax_finish_dynamic_symbol (bfd *output_bfd, struct bfd_link_info *info, - struct elf_link_hash_entry *h, - Elf_Internal_Sym *sym) -{ - bfd *dynobj; - - dynobj = elf_hash_table (info)->dynobj; - - if (h->plt.offset != (bfd_vma) -1) - { - asection *splt; - asection *sgot; - asection *srela; - bfd_vma plt_index; - bfd_vma got_offset; - bfd_vma addend; - Elf_Internal_Rela rela; - bfd_byte *loc; - - /* This symbol has an entry in the procedure linkage table. Set - it up. */ - BFD_ASSERT (h->dynindx != -1); - - splt = bfd_get_linker_section (dynobj, ".plt"); - sgot = bfd_get_linker_section (dynobj, ".got.plt"); - srela = bfd_get_linker_section (dynobj, ".rela.plt"); - BFD_ASSERT (splt != NULL && sgot != NULL && srela != NULL); - - addend = 2 * (h->plt.offset & 1); - h->plt.offset &= ~1; - - /* Get the index in the procedure linkage table which - corresponds to this symbol. This is the index of this symbol - in all the symbols for which we are making plt entries. The - first entry in the procedure linkage table is reserved. */ - plt_index = h->plt.offset / PLT_ENTRY_SIZE - 1; - - /* Get the offset into the .got table of the entry that - corresponds to this function. Each .got entry is 4 bytes. - The first two are reserved. */ - got_offset = (plt_index + 3) * 4; - - /* Fill in the entry in the procedure linkage table. */ - memcpy (splt->contents + h->plt.offset, elf_vax_plt_entry, - PLT_ENTRY_SIZE); - - /* The offset is relative to the first extension word. */ - bfd_put_32 (output_bfd, - -(h->plt.offset + 8), - splt->contents + h->plt.offset + 4); - - bfd_put_32 (output_bfd, plt_index * sizeof (Elf32_External_Rela), - splt->contents + h->plt.offset + 8); - - /* Fill in the entry in the global offset table. */ - bfd_put_32 (output_bfd, - (splt->output_section->vma - + splt->output_offset - + h->plt.offset) + addend, - sgot->contents + got_offset); - - /* Fill in the entry in the .rela.plt section. */ - rela.r_offset = (sgot->output_section->vma - + sgot->output_offset - + got_offset); - rela.r_info = ELF32_R_INFO (h->dynindx, R_VAX_JMP_SLOT); - rela.r_addend = addend; - loc = srela->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. */ - sym->st_shndx = SHN_UNDEF; - } - } - - if (h->got.offset != (bfd_vma) -1) - { - asection *sgot; - asection *srela; - Elf_Internal_Rela rela; - bfd_byte *loc; - - /* This symbol has an entry in the global offset table. Set it - up. */ - sgot = bfd_get_linker_section (dynobj, ".got"); - srela = bfd_get_linker_section (dynobj, ".rela.got"); - BFD_ASSERT (sgot != NULL && srela != NULL); - - rela.r_offset = (sgot->output_section->vma - + sgot->output_offset - + h->got.offset); - rela.r_info = ELF32_R_INFO (h->dynindx, R_VAX_GLOB_DAT); - rela.r_addend = bfd_get_signed_32 (output_bfd, - sgot->contents + h->got.offset); - - loc = srela->contents; - loc += srela->reloc_count++ * sizeof (Elf32_External_Rela); - bfd_elf32_swap_reloca_out (output_bfd, &rela, loc); - } - - if (h->needs_copy) - { - asection *s; - Elf_Internal_Rela rela; - bfd_byte *loc; - - /* This symbol needs a copy reloc. Set it up. */ - BFD_ASSERT (h->dynindx != -1 - && (h->root.type == bfd_link_hash_defined - || h->root.type == bfd_link_hash_defweak)); - - s = bfd_get_linker_section (dynobj, ".rela.bss"); - BFD_ASSERT (s != NULL); - - 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_VAX_COPY); - rela.r_addend = 0; - loc = s->contents + s->reloc_count++ * sizeof (Elf32_External_Rela); - bfd_elf32_swap_reloca_out (output_bfd, &rela, loc); - } - - /* Mark _DYNAMIC and _GLOBAL_OFFSET_TABLE_ as absolute. */ - if (h == elf_hash_table (info)->hdynamic - || h == elf_hash_table (info)->hgot) - sym->st_shndx = SHN_ABS; - - return TRUE; -} - -/* Finish up the dynamic sections. */ - -static bfd_boolean -elf_vax_finish_dynamic_sections (bfd *output_bfd, struct bfd_link_info *info) -{ - bfd *dynobj; - asection *sgot; - asection *sdyn; - - dynobj = elf_hash_table (info)->dynobj; - - sgot = bfd_get_linker_section (dynobj, ".got.plt"); - BFD_ASSERT (sgot != NULL); - sdyn = bfd_get_linker_section (dynobj, ".dynamic"); - - if (elf_hash_table (info)->dynamic_sections_created) - { - asection *splt; - Elf32_External_Dyn *dyncon, *dynconend; - - splt = bfd_get_linker_section (dynobj, ".plt"); - BFD_ASSERT (splt != NULL && sdyn != NULL); - - dyncon = (Elf32_External_Dyn *) sdyn->contents; - dynconend = (Elf32_External_Dyn *) (sdyn->contents + sdyn->size); - for (; dyncon < dynconend; dyncon++) - { - Elf_Internal_Dyn dyn; - const char *name; - asection *s; - - bfd_elf32_swap_dyn_in (dynobj, dyncon, &dyn); - - switch (dyn.d_tag) - { - default: - break; - - case DT_PLTGOT: - name = ".got"; - goto get_vma; - case DT_JMPREL: - name = ".rela.plt"; - get_vma: - s = bfd_get_section_by_name (output_bfd, name); - BFD_ASSERT (s != NULL); - dyn.d_un.d_ptr = s->vma; - bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon); - break; - - case DT_PLTRELSZ: - s = bfd_get_section_by_name (output_bfd, ".rela.plt"); - BFD_ASSERT (s != NULL); - dyn.d_un.d_val = s->size; - bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon); - break; - - case DT_RELASZ: - /* The procedure linkage table relocs (DT_JMPREL) should - not be included in the overall relocs (DT_RELA). - Therefore, we override the DT_RELASZ entry here to - make it not include the JMPREL relocs. Since the - linker script arranges for .rela.plt to follow all - other relocation sections, we don't have to worry - about changing the DT_RELA entry. */ - s = bfd_get_section_by_name (output_bfd, ".rela.plt"); - if (s != NULL) - dyn.d_un.d_val -= s->size; - bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon); - break; - } - } - - /* Fill in the first entry in the procedure linkage table. */ - if (splt->size > 0) - { - memcpy (splt->contents, elf_vax_plt0_entry, PLT_ENTRY_SIZE); - bfd_put_32 (output_bfd, - (sgot->output_section->vma - + sgot->output_offset + 4 - - (splt->output_section->vma + 6)), - splt->contents + 2); - bfd_put_32 (output_bfd, - (sgot->output_section->vma - + sgot->output_offset + 8 - - (splt->output_section->vma + 12)), - splt->contents + 8); - elf_section_data (splt->output_section)->this_hdr.sh_entsize - = PLT_ENTRY_SIZE; - } - } - - /* Fill in the first three entries in the global offset table. */ - if (sgot->size > 0) - { - if (sdyn == NULL) - bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents); - else - bfd_put_32 (output_bfd, - sdyn->output_section->vma + sdyn->output_offset, - sgot->contents); - bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents + 4); - bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents + 8); - } - - if (elf_section_data (sgot->output_section) != NULL) - elf_section_data (sgot->output_section)->this_hdr.sh_entsize = 4; - - return TRUE; -} - -static enum elf_reloc_type_class -elf_vax_reloc_type_class (const struct bfd_link_info *info ATTRIBUTE_UNUSED, - const asection *rel_sec ATTRIBUTE_UNUSED, - const Elf_Internal_Rela *rela) -{ - switch ((int) ELF32_R_TYPE (rela->r_info)) - { - case R_VAX_RELATIVE: - return reloc_class_relative; - case R_VAX_JMP_SLOT: - return reloc_class_plt; - case R_VAX_COPY: - return reloc_class_copy; - default: - return reloc_class_normal; - } -} - -static bfd_vma -elf_vax_plt_sym_val (bfd_vma i, const asection *plt, - const arelent *rel ATTRIBUTE_UNUSED) -{ - return plt->vma + (i + 1) * PLT_ENTRY_SIZE; -} - -#define TARGET_LITTLE_SYM bfd_elf32_vax_vec -#define TARGET_LITTLE_NAME "elf32-vax" -#define ELF_MACHINE_CODE EM_VAX -#define ELF_MAXPAGESIZE 0x1000 - -#define elf_backend_create_dynamic_sections \ - _bfd_elf_create_dynamic_sections -#define bfd_elf32_bfd_link_hash_table_create \ - elf_vax_link_hash_table_create -#define bfd_elf32_bfd_final_link bfd_elf_gc_common_final_link - -#define elf_backend_check_relocs elf_vax_check_relocs -#define elf_backend_adjust_dynamic_symbol \ - elf_vax_adjust_dynamic_symbol -#define elf_backend_always_size_sections \ - elf_vax_always_size_sections -#define elf_backend_size_dynamic_sections \ - elf_vax_size_dynamic_sections -#define elf_backend_init_index_section _bfd_elf_init_1_index_section -#define elf_backend_relocate_section elf_vax_relocate_section -#define elf_backend_finish_dynamic_symbol \ - elf_vax_finish_dynamic_symbol -#define elf_backend_finish_dynamic_sections \ - elf_vax_finish_dynamic_sections -#define elf_backend_reloc_type_class elf_vax_reloc_type_class -#define elf_backend_gc_mark_hook elf_vax_gc_mark_hook -#define elf_backend_gc_sweep_hook elf_vax_gc_sweep_hook -#define elf_backend_plt_sym_val elf_vax_plt_sym_val -#define bfd_elf32_bfd_merge_private_bfd_data \ - elf32_vax_merge_private_bfd_data -#define bfd_elf32_bfd_set_private_flags \ - elf32_vax_set_private_flags -#define bfd_elf32_bfd_print_private_bfd_data \ - elf32_vax_print_private_bfd_data - -#define elf_backend_can_gc_sections 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 16 -#define elf_backend_rela_normal 1 - -#include "elf32-target.h" |