From 34e967a5f3ac5fd0353731a259e358d462823290 Mon Sep 17 00:00:00 2001 From: Miranda Cupertino Date: Tue, 19 Jan 2016 15:25:58 +0000 Subject: 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. --- bfd/arc-plt.h | 196 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 196 insertions(+) create mode 100644 bfd/arc-plt.h (limited to 'bfd/arc-plt.h') diff --git a/bfd/arc-plt.h b/bfd/arc-plt.h new file mode 100644 index 0000000..fec461d --- /dev/null +++ b/bfd/arc-plt.h @@ -0,0 +1,196 @@ +/* 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 + +/* 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 */ -- cgit v1.1