binutils-gdb/bfd/arc-plt.h

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Add PIC and TLS support to the ARC target. bfd/ChangeLog: * arc-plt.def: New file. * arc-plt.h: Likewise. * elf32-arc.c (elf_arc_abs_plt0_entry, elf_arc_abs_pltn_entry, elf_arcV2_abs_plt0_entry, elf_arcV2_abs_pltn_entry, elf_arc_pic_plt0_entry, elf_arc_pic_pltn_entry, elf_arcV2_pic_plt0_entry, elf_arcV2_pic_pltn_entry): Remove. (name_for_global_symbol): Added. (ADD_RELA): Helper to create dynamic relocs. (new_got_entry_to_list): Create a new got entry in linked list. (symbol_has_entry_of_type): Search for specific type of entry in list. (is_reloc_for_GOT): return FALSE for any TLS related relocs. (is_reloc_for_TLS, arc_elf_set_private_flags) (arc_elf_print_private_bfd_data, arc_elf_copy_private_bfd_data) (arc_elf_merge_private_bfd_data): New functions. (debug_arc_reloc): Cleaned debug info printing. (PDATA reloc): Changed not to perform address alignment. (reverse_me): Added. Fix for ARC_32 relocs. (arc_do_relocation): Return bfd_reloc_of when no relocation should occur. (arc_get_local_got_ents): Renamed from arc_get_local_got_offsets. Changed function to access an array of list of GOT entries instead of just an array of offsets. (elf_arc_relocate_section): Added support for PIC and TLS related relocations. (elf_arc_check_relocs): Likewise. (elf_arc_adjust_dynamic_symbol, elf_arc_finish_dynamic_symbol, (elf_arc_finish_dynamic_sections): Likewise (arc_create_dynamic_sections): Modified conditions to create dynamic sections. (ADD_SYMBOL_REF_SEC_AND_RELOC): New macro. (plt_do_relocs_for_symbol, relocate_plt_for_symbol) (relocate_plt_for_entry): Changed to support new way to define PLT related code. (add_symbol_to_plt): Likewise. (arc_elf_link_hash_table_create): New function. include/ChangeLog: * elf/arc-reloc.def (ARC_32, ARC_GOTPC, ARC_TLS_GD_GOT) (ARC_TLS_IE_GOT, ARC_TLS_DTPOFF, ARC_TLS_DTPOFF_S9, ARC_TLS_LE_S9) (ARC_TLS_LE_32): Fixed formula. (ARC_TLS_GD_LD): Use new special function. * opcode/arc-func.h: Changed all the replacement functions to clear the patching bits before doing an or it with the value argument.
2016-01-19 16:25:58 +01:00
/* ARC-specific header file for PLT support.
Copyright (C) 2016 Free Software Foundation, Inc.
Contributed by Cupertino Miranda (cmiranda@synopsys.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. */
#ifndef ARC_PLT_H
#define ARC_PLT_H
#include <stdint.h>
/* Instructions appear in memory as a sequence of half-words (16 bit);
individual half-words are represented on the target in target byte order.
We use 'unsigned short' on the host to represent the PLT templates,
and translate to target byte order as we copy to the target. */
typedef uint16_t insn_hword;
enum plt_reloc_symbol
{
LAST_RELOC = 0,
SGOT = 1,
RELATIVE = (1 << 8),
RELATIVE_INSN_32 = (1 << 9),
RELATIVE_INSN_24 = (1 << 10),
MIDDLE_ENDIAN = (1 << 11)
};
#define IS_RELATIVE(S) ((S & (RELATIVE | RELATIVE_INSN_24 | RELATIVE_INSN_32)) != 0)
#define IS_INSN_32(S) ((S & RELATIVE_INSN_32) != 0)
#define IS_INSN_24(S) ((S & RELATIVE_INSN_24) != 0)
#define IS_MIDDLE_ENDIAN(S) ((S & MIDDLE_ENDIAN) != 0)
#define SYM_ONLY(S) (S & 0xFF)
struct plt_reloc
{
bfd_vma offset;
bfd_vma size;
bfd_vma mask;
enum plt_reloc_symbol symbol;
bfd_vma addend;
};
#define PLT_TYPE_START(NAME) NAME,
#define PLT_TYPE_END(NAME)
#define PLT_ENTRY(...)
#define PLT_ELEM(...)
#define ENTRY_RELOC(...)
#define ELEM_RELOC(...)
enum plt_types_enum
{
PLT_START = -1,
#include "arc-plt.def"
PLT_MAX
};
#undef PLT_TYPE_START
#undef PLT_TYPE_END
#undef PLT_ENTRY
#undef PLT_ELEM
#undef ENTRY_RELOC
#undef ELEM_RELOC
typedef insn_hword insn_hword_array[];
struct plt_version_t
{
const insn_hword_array *entry;
const bfd_vma entry_size;
const insn_hword_array *elem;
const bfd_vma elem_size;
const struct plt_reloc *entry_relocs;
const struct plt_reloc *elem_relocs;
};
#define PLT_TYPE_START(NAME) \
const insn_hword NAME##_plt_entry[] = {
#define PLT_TYPE_END(NAME) };
#define PLT_ENTRY(...) __VA_ARGS__,
#define PLT_ELEM(...)
#define ENTRY_RELOC(...)
#define ELEM_RELOC(...)
#include "arc-plt.def"
#undef PLT_TYPE_START
#undef PLT_TYPE_END
#undef PLT_ENTRY
#undef PLT_ELEM
#undef ENTRY_RELOC
#undef ELEM_RELOC
#define PLT_TYPE_START(NAME) \
const struct plt_reloc NAME##_plt_entry_relocs[] = {
#define PLT_TYPE_END(NAME) \
{0, 0, 0, LAST_RELOC, 0} \
};
#define PLT_ENTRY(...)
#define PLT_ELEM(...)
#define ENTRY_RELOC(...) { __VA_ARGS__ },
#define ELEM_RELOC(...)
#include "arc-plt.def"
#undef PLT_TYPE_START
#undef PLT_TYPE_END
#undef PLT_ENTRY
#undef PLT_ELEM
#undef ENTRY_RELOC
#undef ELEM_RELOC
#define PLT_TYPE_START(NAME) \
const insn_hword NAME##_plt_elem[] = {
#define PLT_TYPE_END(NAME) };
#define PLT_ENTRY(...)
#define PLT_ELEM(...) __VA_ARGS__,
#define ENTRY_RELOC(...)
#define ELEM_RELOC(...)
#include "arc-plt.def"
#undef PLT_TYPE_START
#undef PLT_TYPE_END
#undef PLT_ENTRY
#undef PLT_ELEM
#undef ENTRY_RELOC
#undef ELEM_RELOC
#define PLT_TYPE_START(NAME) \
const struct plt_reloc NAME##_plt_elem_relocs[] = {
#define PLT_TYPE_END(NAME) \
{0, 0, 0, LAST_RELOC, 0} \
};
#define PLT_ENTRY(...)
#define PLT_ELEM(...)
#define ENTRY_RELOC(...)
#define ELEM_RELOC(...) { __VA_ARGS__ },
#include "arc-plt.def"
#undef PLT_TYPE_START
#undef PLT_TYPE_END
#undef PLT_ENTRY
#undef PLT_ELEM
#undef ENTRY_RELOC
#undef ELEM_RELOC
#define PLT_TYPE_START(NAME) \
{ \
.entry = &NAME##_plt_entry, \
.entry_size = sizeof (NAME##_plt_entry), \
.elem = &NAME##_plt_elem, \
.elem_size = sizeof (NAME##_plt_elem), \
.entry_relocs = NAME##_plt_entry_relocs, \
.elem_relocs = NAME##_plt_elem_relocs
#define PLT_TYPE_END(NAME) },
#define PLT_ENTRY(...)
#define PLT_ELEM(...)
#define ENTRY_RELOC(...)
#define ELEM_RELOC(...)
struct plt_version_t plt_versions[PLT_MAX] = {
#include "arc-plt.def"
};
#undef PLT_TYPE_START
#undef PLT_TYPE_END
#undef PLT_ENTRY
#undef PLT_ELEM
#undef ENTRY_RELOC
#undef ELEM_RELOC
#endif /* ARC_PLT_H */