diff options
Diffstat (limited to 'binutils-2.24/bfd/elf-vxworks.c')
-rw-r--r-- | binutils-2.24/bfd/elf-vxworks.c | 301 |
1 files changed, 0 insertions, 301 deletions
diff --git a/binutils-2.24/bfd/elf-vxworks.c b/binutils-2.24/bfd/elf-vxworks.c deleted file mode 100644 index bb9dbbba..00000000 --- a/binutils-2.24/bfd/elf-vxworks.c +++ /dev/null @@ -1,301 +0,0 @@ -/* VxWorks support for ELF - Copyright 2005, 2006, 2007, 2009, 2012 Free Software Foundation, Inc. - - 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., 59 Temple Place - Suite 330, Boston, - MA 02111-1307, USA. */ - -/* This file provides routines used by all VxWorks targets. */ - -#include "sysdep.h" -#include "bfd.h" -#include "libbfd.h" -#include "elf-bfd.h" -#include "elf-vxworks.h" -#include "elf/vxworks.h" - -/* Return true if symbol NAME, as defined by ABFD, is one of the special - __GOTT_BASE__ or __GOTT_INDEX__ symbols. */ - -static bfd_boolean -elf_vxworks_gott_symbol_p (bfd *abfd, const char *name) -{ - char leading; - - leading = bfd_get_symbol_leading_char (abfd); - if (leading) - { - if (*name != leading) - return FALSE; - name++; - } - return (strcmp (name, "__GOTT_BASE__") == 0 - || strcmp (name, "__GOTT_INDEX__") == 0); -} - -/* Tweak magic VxWorks symbols as they are loaded. */ -bfd_boolean -elf_vxworks_add_symbol_hook (bfd *abfd, - struct bfd_link_info *info, - Elf_Internal_Sym *sym, - const char **namep, - flagword *flagsp, - asection **secp ATTRIBUTE_UNUSED, - bfd_vma *valp ATTRIBUTE_UNUSED) -{ - /* Ideally these "magic" symbols would be exported by libc.so.1 - which would be found via a DT_NEEDED tag, and then handled - specially by the linker at runtime. Except shared libraries - don't even link to libc.so.1 by default... - If the symbol is imported from, or will be put in a shared library, - give the symbol weak binding to get the desired samantics. - This transformation will be undone in - elf_i386_vxworks_link_output_symbol_hook. */ - if ((info->shared || abfd->flags & DYNAMIC) - && elf_vxworks_gott_symbol_p (abfd, *namep)) - { - sym->st_info = ELF_ST_INFO (STB_WEAK, ELF_ST_TYPE (sym->st_info)); - *flagsp |= BSF_WEAK; - } - - return TRUE; -} - -/* Perform VxWorks-specific handling of the create_dynamic_sections hook. - When creating an executable, set *SRELPLT2_OUT to the .rel(a).plt.unloaded - section. */ - -bfd_boolean -elf_vxworks_create_dynamic_sections (bfd *dynobj, struct bfd_link_info *info, - asection **srelplt2_out) -{ - struct elf_link_hash_table *htab; - const struct elf_backend_data *bed; - asection *s; - - htab = elf_hash_table (info); - bed = get_elf_backend_data (dynobj); - - if (!info->shared) - { - s = bfd_make_section_anyway_with_flags (dynobj, - bed->default_use_rela_p - ? ".rela.plt.unloaded" - : ".rel.plt.unloaded", - SEC_HAS_CONTENTS | SEC_IN_MEMORY - | SEC_READONLY - | SEC_LINKER_CREATED); - if (s == NULL - || !bfd_set_section_alignment (dynobj, s, bed->s->log_file_align)) - return FALSE; - - *srelplt2_out = s; - } - - /* Mark the GOT and PLT symbols as having relocations; they might - not, but we won't know for sure until we build the GOT in - finish_dynamic_symbol. Also make sure that the GOT symbol - is entered into the dynamic symbol table; the loader uses it - to initialize __GOTT_BASE__[__GOTT_INDEX__]. */ - if (htab->hgot) - { - htab->hgot->indx = -2; - htab->hgot->other &= ~ELF_ST_VISIBILITY (-1); - htab->hgot->forced_local = 0; - if (!bfd_elf_link_record_dynamic_symbol (info, htab->hgot)) - return FALSE; - } - if (htab->hplt) - { - htab->hplt->indx = -2; - htab->hplt->type = STT_FUNC; - } - - return TRUE; -} - -/* Tweak magic VxWorks symbols as they are written to the output file. */ -int -elf_vxworks_link_output_symbol_hook (struct bfd_link_info *info - ATTRIBUTE_UNUSED, - const char *name, - Elf_Internal_Sym *sym, - asection *input_sec ATTRIBUTE_UNUSED, - struct elf_link_hash_entry *h) -{ - /* Reverse the effects of the hack in elf_vxworks_add_symbol_hook. */ - if (h - && h->root.type == bfd_link_hash_undefweak - && elf_vxworks_gott_symbol_p (h->root.u.undef.abfd, name)) - sym->st_info = ELF_ST_INFO (STB_GLOBAL, ELF_ST_TYPE (sym->st_info)); - - return 1; -} - -/* Copy relocations into the output file. Fixes up relocations against PLT - entries, then calls the generic routine. */ - -bfd_boolean -elf_vxworks_emit_relocs (bfd *output_bfd, - asection *input_section, - Elf_Internal_Shdr *input_rel_hdr, - Elf_Internal_Rela *internal_relocs, - struct elf_link_hash_entry **rel_hash) -{ - const struct elf_backend_data *bed; - int j; - - bed = get_elf_backend_data (output_bfd); - - if (output_bfd->flags & (DYNAMIC|EXEC_P)) - { - Elf_Internal_Rela *irela; - Elf_Internal_Rela *irelaend; - struct elf_link_hash_entry **hash_ptr; - - for (irela = internal_relocs, - irelaend = irela + (NUM_SHDR_ENTRIES (input_rel_hdr) - * bed->s->int_rels_per_ext_rel), - hash_ptr = rel_hash; - irela < irelaend; - irela += bed->s->int_rels_per_ext_rel, - hash_ptr++) - { - if (*hash_ptr - && (*hash_ptr)->def_dynamic - && !(*hash_ptr)->def_regular - && ((*hash_ptr)->root.type == bfd_link_hash_defined - || (*hash_ptr)->root.type == bfd_link_hash_defweak) - && (*hash_ptr)->root.u.def.section->output_section != NULL) - { - /* This is a relocation from an executable or shared - library against a symbol in a different shared - library. We are creating a definition in the output - file but it does not come from any of our normal (.o) - files. ie. a PLT stub. Normally this would be a - relocation against against SHN_UNDEF with the VMA of - the PLT stub. This upsets the VxWorks loader. - Convert it to a section-relative relocation. This - gets some other symbols (for instance .dynbss), but - is conservatively correct. */ - for (j = 0; j < bed->s->int_rels_per_ext_rel; j++) - { - asection *sec = (*hash_ptr)->root.u.def.section; - int this_idx = sec->output_section->target_index; - - irela[j].r_info - = ELF32_R_INFO (this_idx, ELF32_R_TYPE (irela[j].r_info)); - irela[j].r_addend += (*hash_ptr)->root.u.def.value; - irela[j].r_addend += sec->output_offset; - } - /* Stop the generic routine adjusting this entry. */ - *hash_ptr = NULL; - } - } - } - return _bfd_elf_link_output_relocs (output_bfd, input_section, - input_rel_hdr, internal_relocs, - rel_hash); -} - - -/* Set the sh_link and sh_info fields on the static plt relocation secton. */ - -void -elf_vxworks_final_write_processing (bfd *abfd, - bfd_boolean linker ATTRIBUTE_UNUSED) -{ - asection * sec; - struct bfd_elf_section_data *d; - - sec = bfd_get_section_by_name (abfd, ".rel.plt.unloaded"); - if (!sec) - sec = bfd_get_section_by_name (abfd, ".rela.plt.unloaded"); - if (!sec) - return; - d = elf_section_data (sec); - d->this_hdr.sh_link = elf_onesymtab (abfd); - sec = bfd_get_section_by_name (abfd, ".plt"); - if (sec) - d->this_hdr.sh_info = elf_section_data (sec)->this_idx; -} - -/* Add the dynamic entries required by VxWorks. These point to the - tls sections. */ - -bfd_boolean -elf_vxworks_add_dynamic_entries (bfd *output_bfd, struct bfd_link_info *info) -{ - if (bfd_get_section_by_name (output_bfd, ".tls_data")) - { - if (!_bfd_elf_add_dynamic_entry (info, DT_VX_WRS_TLS_DATA_START, 0) - || !_bfd_elf_add_dynamic_entry (info, DT_VX_WRS_TLS_DATA_SIZE, 0) - || !_bfd_elf_add_dynamic_entry (info, DT_VX_WRS_TLS_DATA_ALIGN, 0)) - return FALSE; - } - if (bfd_get_section_by_name (output_bfd, ".tls_vars")) - { - if (!_bfd_elf_add_dynamic_entry (info, DT_VX_WRS_TLS_VARS_START, 0) - || !_bfd_elf_add_dynamic_entry (info, DT_VX_WRS_TLS_VARS_SIZE, 0)) - return FALSE; - } - return TRUE; -} - -/* If *DYN is one of the VxWorks-specific dynamic entries, then fill - in the value now and return TRUE. Otherwise return FALSE. */ - -bfd_boolean -elf_vxworks_finish_dynamic_entry (bfd *output_bfd, Elf_Internal_Dyn *dyn) -{ - asection *sec; - - switch (dyn->d_tag) - { - default: - return FALSE; - - case DT_VX_WRS_TLS_DATA_START: - sec = bfd_get_section_by_name (output_bfd, ".tls_data"); - dyn->d_un.d_ptr = sec->vma; - break; - - case DT_VX_WRS_TLS_DATA_SIZE: - sec = bfd_get_section_by_name (output_bfd, ".tls_data"); - dyn->d_un.d_val = sec->size; - break; - - case DT_VX_WRS_TLS_DATA_ALIGN: - sec = bfd_get_section_by_name (output_bfd, ".tls_data"); - dyn->d_un.d_val - = (bfd_size_type)1 << bfd_get_section_alignment (output_bfd, - sec); - break; - - case DT_VX_WRS_TLS_VARS_START: - sec = bfd_get_section_by_name (output_bfd, ".tls_vars"); - dyn->d_un.d_ptr = sec->vma; - break; - - case DT_VX_WRS_TLS_VARS_SIZE: - sec = bfd_get_section_by_name (output_bfd, ".tls_vars"); - dyn->d_un.d_val = sec->size; - break; - } - return TRUE; -} - - |