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khays |
/* Open8-specific support for 32-bit ELF
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Copyright 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008,
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2009, 2010, 2011 Free Software Foundation, Inc.
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Contributed by Kirk Hays <khays@hayshaus.com>
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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,
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Boston, MA 02110-1301, USA. */
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#include "sysdep.h"
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#include "bfd.h"
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#include "libbfd.h"
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#include "elf-bfd.h"
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#include "elf/open8.h"
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#include "elf32-open8.h"
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/* Enable debugging printout at stdout with this variable. */
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static bfd_boolean debug_relax = FALSE;
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/* Enable debugging printout at stdout with this variable. */
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static bfd_boolean debug_stubs = FALSE;
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/* Hash table initialization and handling. Code is taken from the hppa port
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and adapted to the needs of OPEN8. */
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/* We use two hash tables to hold information for linking open8 objects.
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The first is the elf32_open8_link_hash_table which is derived from the
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stanard ELF linker hash table. We use this as a place to attach the other
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hash table and some static information.
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The second is the stub hash table which is derived from the base BFD
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hash table. The stub hash table holds the information on the linker
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stubs. */
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struct elf32_open8_stub_hash_entry
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{
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/* Base hash table entry structure. */
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struct bfd_hash_entry bh_root;
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/* Offset within stub_sec of the beginning of this stub. */
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bfd_vma stub_offset;
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/* Given the symbol's value and its section we can determine its final
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value when building the stubs (so the stub knows where to jump). */
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bfd_vma target_value;
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/* This way we could mark stubs to be no longer necessary. */
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bfd_boolean is_actually_needed;
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};
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struct elf32_open8_link_hash_table
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{
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/* The main hash table. */
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struct elf_link_hash_table etab;
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/* The stub hash table. */
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struct bfd_hash_table bstab;
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bfd_boolean no_stubs;
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/* Linker stub bfd. */
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bfd *stub_bfd;
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/* The stub section. */
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asection *stub_sec;
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/* Usually 0, unless we are generating code for a bootloader. Will
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be initialized by elf32_open8_size_stubs to the vma offset of the
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output section associated with the stub section. */
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bfd_vma vector_base;
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/* Assorted information used by elf32_open8_size_stubs. */
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unsigned int bfd_count;
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int top_index;
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asection ** input_list;
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Elf_Internal_Sym ** all_local_syms;
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/* Tables for mapping vma beyond the 128k boundary to the address of the
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corresponding stub. (AMT)
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"amt_max_entry_cnt" reflects the number of entries that memory is allocated
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for in the "amt_stub_offsets" and "amt_destination_addr" arrays.
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"amt_entry_cnt" informs how many of these entries actually contain
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useful data. */
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unsigned int amt_entry_cnt;
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unsigned int amt_max_entry_cnt;
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bfd_vma * amt_stub_offsets;
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bfd_vma * amt_destination_addr;
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};
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/* Various hash macros and functions. */
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/* PR 3874: Check that we have an OPEN8 style hash table before
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using it. */
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#define open8_link_hash_table(p) \
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(elf_hash_table_id ((struct elf_link_hash_table *) ((p)->hash)) \
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== OPEN8_ELF_DATA \
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? ((struct elf32_open8_link_hash_table *) ((p)->hash)) \
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: NULL)
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#define open8_stub_hash_entry(ent) \
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((struct elf32_open8_stub_hash_entry *)(ent))
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#define open8_stub_hash_lookup(table, string, create, copy) \
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((struct elf32_open8_stub_hash_entry *) \
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bfd_hash_lookup ((table), (string), (create), (copy)))
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static reloc_howto_type elf_open8_howto_table[] =
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{
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HOWTO (R_OPEN8_NONE,
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0,
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2,
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32,
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FALSE,
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0,
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complain_overflow_bitfield,
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bfd_elf_generic_reloc,
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"R_OPEN8_NONE",
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FALSE,
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0,
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0,
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FALSE),
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HOWTO (R_OPEN8_32,
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0,
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2,
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32,
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FALSE,
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0,
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complain_overflow_bitfield,
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bfd_elf_generic_reloc,
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"R_OPEN8_32",
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FALSE,
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0xffffffff,
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0xffffffff,
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FALSE),
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/* An 8 bit PC relative relocation. */
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HOWTO (R_OPEN8_PCREL,
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0,
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1,
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8,
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TRUE,
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0,
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complain_overflow_bitfield,
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bfd_elf_generic_reloc,
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"R_OPEN8_PCREL",
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FALSE,
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0xff,
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0xff,
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TRUE),
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/* A 16 bit absolute relocation. */
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HOWTO (R_OPEN8_16,
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0,
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1,
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16,
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FALSE,
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0,
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complain_overflow_dont,
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bfd_elf_generic_reloc,
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"R_OPEN8_16",
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FALSE,
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0xffff,
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0xffff,
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FALSE),
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/* A low 8 bit absolute relocation of 16 bit address.
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For LDI command. */
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HOWTO (R_OPEN8_LO8_LDI,
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0,
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1,
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8,
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FALSE,
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0,
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complain_overflow_dont,
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bfd_elf_generic_reloc,
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"R_OPEN8_LO8_LDI",
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FALSE,
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0xffff,
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0xffff,
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FALSE),
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/* A high 8 bit absolute relocation of 16 bit address.
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For LDI command. */
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HOWTO (R_OPEN8_HI8_LDI,
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8,
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1,
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8,
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FALSE,
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0,
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complain_overflow_dont,
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bfd_elf_generic_reloc,
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"R_OPEN8_HI8_LDI",
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FALSE,
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0xffff,
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0xffff,
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FALSE),
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/* A negative low 8 bit absolute relocation of 16 bit address.
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For LDI command. */
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HOWTO (R_OPEN8_LO8_LDI_NEG,
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0,
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1,
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8,
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FALSE,
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0,
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complain_overflow_dont,
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bfd_elf_generic_reloc,
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"R_OPEN8_LO8_LDI_NEG",
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FALSE,
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0xffff,
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0xffff,
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FALSE),
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/* A negative high 8 bit absolute relocation of 16 bit address.
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For LDI command. */
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HOWTO (R_OPEN8_HI8_LDI_NEG,
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8,
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1,
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8,
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FALSE,
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0,
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complain_overflow_dont,
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bfd_elf_generic_reloc,
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"R_OPEN8_HI8_LDI_NEG",
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FALSE,
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0xffff,
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0xffff,
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FALSE),
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/* Relocation for JSR and JMP in OPEN8. */
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HOWTO (R_OPEN8_CALL,
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0,
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2,
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16,
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FALSE,
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0,
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complain_overflow_dont,
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bfd_elf_generic_reloc,
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"R_OPEN8_CALL",
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FALSE,
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0xffffffff,
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0xffffffff,
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FALSE),
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/* 8 bit offset. */
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HOWTO (R_OPEN8_8,
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0,
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0,
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8,
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FALSE,
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0,
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complain_overflow_bitfield,
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bfd_elf_generic_reloc,
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"R_OPEN8_8",
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FALSE,
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0x000000ff,
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0x000000ff,
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FALSE),
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};
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/* Map BFD reloc types to OPEN8 ELF reloc types. */
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struct open8_reloc_map
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{
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bfd_reloc_code_real_type bfd_reloc_val;
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unsigned int elf_reloc_val;
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};
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static const struct open8_reloc_map open8_reloc_map[] =
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{
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{ BFD_RELOC_NONE, R_OPEN8_NONE },
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{ BFD_RELOC_32, R_OPEN8_32 },
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{ BFD_RELOC_OPEN8_PCREL, R_OPEN8_PCREL },
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{ BFD_RELOC_16, R_OPEN8_16 },
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{ BFD_RELOC_OPEN8_LO8_LDI, R_OPEN8_LO8_LDI},
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{ BFD_RELOC_OPEN8_HI8_LDI, R_OPEN8_HI8_LDI },
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{ BFD_RELOC_OPEN8_LO8_LDI_NEG, R_OPEN8_LO8_LDI_NEG },
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{ BFD_RELOC_OPEN8_HI8_LDI_NEG, R_OPEN8_HI8_LDI_NEG },
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{ BFD_RELOC_OPEN8_CALL, R_OPEN8_CALL },
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{ BFD_RELOC_8, R_OPEN8_8 }
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};
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/* Meant to be filled one day with the wrap around address for the
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specific device. I.e., should get the value 0x4000 for 16k devices,
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0x8000 for 32k devices and so on.
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We initialize it here with a value of 0x1000000 resulting in
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that we will never suggest a wrap-around jump during relaxation.
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The logic of the source code later on assumes that in
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open8_pc_wrap_around one single bit is set. */
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static bfd_vma open8_pc_wrap_around = 0x10000000;
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/* If this variable holds a value different from zero, the linker relaxation
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machine will try to optimize call/ret sequences by a single jump
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instruction. This option could be switched off by a linker switch. */
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static int open8_replace_call_ret_sequences = 1;
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/* Initialize an entry in the stub hash table. */
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static struct bfd_hash_entry *
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stub_hash_newfunc (struct bfd_hash_entry *entry,
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struct bfd_hash_table *table,
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const char *string)
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{
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/* Allocate the structure if it has not already been allocated by a
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subclass. */
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if (entry == NULL)
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{
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entry = bfd_hash_allocate (table,
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sizeof (struct elf32_open8_stub_hash_entry));
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if (entry == NULL)
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return entry;
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}
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| 328 |
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/* Call the allocation method of the superclass. */
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entry = bfd_hash_newfunc (entry, table, string);
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if (entry != NULL)
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{
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struct elf32_open8_stub_hash_entry *hsh;
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/* Initialize the local fields. */
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hsh = open8_stub_hash_entry (entry);
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hsh->stub_offset = 0;
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hsh->target_value = 0;
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}
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return entry;
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}
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| 343 |
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| 344 |
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/* This function is just a straight passthrough to the real
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function in linker.c. Its purpose is so that its address
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can be compared inside the open8_link_hash_table macro. */
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| 347 |
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| 348 |
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static struct bfd_hash_entry *
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| 349 |
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elf32_open8_link_hash_newfunc (struct bfd_hash_entry * entry,
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| 350 |
|
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struct bfd_hash_table * table,
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| 351 |
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const char * string)
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| 352 |
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{
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return _bfd_elf_link_hash_newfunc (entry, table, string);
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| 354 |
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}
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| 355 |
|
|
|
| 356 |
|
|
/* Create the derived linker hash table. The OPEN8 ELF port uses the derived
|
| 357 |
|
|
hash table to keep information specific to the OPEN8 ELF linker (without
|
| 358 |
|
|
using static variables). */
|
| 359 |
|
|
|
| 360 |
|
|
static struct bfd_link_hash_table *
|
| 361 |
|
|
elf32_open8_link_hash_table_create (bfd *abfd)
|
| 362 |
|
|
{
|
| 363 |
|
|
struct elf32_open8_link_hash_table *htab;
|
| 364 |
|
|
bfd_size_type amt = sizeof (*htab);
|
| 365 |
|
|
|
| 366 |
|
|
htab = bfd_malloc (amt);
|
| 367 |
|
|
if (htab == NULL)
|
| 368 |
|
|
return NULL;
|
| 369 |
|
|
|
| 370 |
|
|
if (!_bfd_elf_link_hash_table_init (&htab->etab, abfd,
|
| 371 |
|
|
elf32_open8_link_hash_newfunc,
|
| 372 |
|
|
sizeof (struct elf_link_hash_entry),
|
| 373 |
|
|
OPEN8_ELF_DATA))
|
| 374 |
|
|
{
|
| 375 |
|
|
free (htab);
|
| 376 |
|
|
return NULL;
|
| 377 |
|
|
}
|
| 378 |
|
|
|
| 379 |
|
|
/* Init the stub hash table too. */
|
| 380 |
|
|
if (!bfd_hash_table_init (&htab->bstab, stub_hash_newfunc,
|
| 381 |
|
|
sizeof (struct elf32_open8_stub_hash_entry)))
|
| 382 |
|
|
return NULL;
|
| 383 |
|
|
|
| 384 |
|
|
htab->stub_bfd = NULL;
|
| 385 |
|
|
htab->stub_sec = NULL;
|
| 386 |
|
|
|
| 387 |
|
|
/* Initialize the address mapping table. */
|
| 388 |
|
|
htab->amt_stub_offsets = NULL;
|
| 389 |
|
|
htab->amt_destination_addr = NULL;
|
| 390 |
|
|
htab->amt_entry_cnt = 0;
|
| 391 |
|
|
htab->amt_max_entry_cnt = 0;
|
| 392 |
|
|
|
| 393 |
|
|
return &htab->etab.root;
|
| 394 |
|
|
}
|
| 395 |
|
|
|
| 396 |
|
|
/* Free the derived linker hash table. */
|
| 397 |
|
|
|
| 398 |
|
|
static void
|
| 399 |
|
|
elf32_open8_link_hash_table_free (struct bfd_link_hash_table *btab)
|
| 400 |
|
|
{
|
| 401 |
|
|
struct elf32_open8_link_hash_table *htab
|
| 402 |
|
|
= (struct elf32_open8_link_hash_table *) btab;
|
| 403 |
|
|
|
| 404 |
|
|
/* Free the address mapping table. */
|
| 405 |
|
|
if (htab->amt_stub_offsets != NULL)
|
| 406 |
|
|
free (htab->amt_stub_offsets);
|
| 407 |
|
|
if (htab->amt_destination_addr != NULL)
|
| 408 |
|
|
free (htab->amt_destination_addr);
|
| 409 |
|
|
|
| 410 |
|
|
bfd_hash_table_free (&htab->bstab);
|
| 411 |
|
|
_bfd_generic_link_hash_table_free (btab);
|
| 412 |
|
|
}
|
| 413 |
|
|
|
| 414 |
|
|
static reloc_howto_type *
|
| 415 |
|
|
bfd_elf32_bfd_reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED,
|
| 416 |
|
|
bfd_reloc_code_real_type code)
|
| 417 |
|
|
{
|
| 418 |
|
|
unsigned int i;
|
| 419 |
|
|
|
| 420 |
|
|
for (i = 0;
|
| 421 |
|
|
i < sizeof (open8_reloc_map) / sizeof (struct open8_reloc_map);
|
| 422 |
|
|
i++)
|
| 423 |
|
|
if (open8_reloc_map[i].bfd_reloc_val == code)
|
| 424 |
|
|
return &elf_open8_howto_table[open8_reloc_map[i].elf_reloc_val];
|
| 425 |
|
|
|
| 426 |
|
|
return NULL;
|
| 427 |
|
|
}
|
| 428 |
|
|
|
| 429 |
|
|
static reloc_howto_type *
|
| 430 |
|
|
bfd_elf32_bfd_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED,
|
| 431 |
|
|
const char *r_name)
|
| 432 |
|
|
{
|
| 433 |
|
|
unsigned int i;
|
| 434 |
|
|
|
| 435 |
|
|
for (i = 0;
|
| 436 |
|
|
i < sizeof (elf_open8_howto_table) / sizeof (elf_open8_howto_table[0]);
|
| 437 |
|
|
i++)
|
| 438 |
|
|
if (elf_open8_howto_table[i].name != NULL
|
| 439 |
|
|
&& strcasecmp (elf_open8_howto_table[i].name, r_name) == 0)
|
| 440 |
|
|
return &elf_open8_howto_table[i];
|
| 441 |
|
|
|
| 442 |
|
|
return NULL;
|
| 443 |
|
|
}
|
| 444 |
|
|
|
| 445 |
|
|
/* Set the howto pointer for an OPEN8 ELF reloc. */
|
| 446 |
|
|
|
| 447 |
|
|
static void
|
| 448 |
|
|
open8_info_to_howto_rela (bfd *abfd ATTRIBUTE_UNUSED,
|
| 449 |
|
|
arelent *cache_ptr,
|
| 450 |
|
|
Elf_Internal_Rela *dst)
|
| 451 |
|
|
{
|
| 452 |
|
|
unsigned int r_type;
|
| 453 |
|
|
|
| 454 |
|
|
r_type = ELF32_R_TYPE (dst->r_info);
|
| 455 |
|
|
BFD_ASSERT (r_type < (unsigned int) R_OPEN8_max);
|
| 456 |
|
|
cache_ptr->howto = &elf_open8_howto_table[r_type];
|
| 457 |
|
|
}
|
| 458 |
|
|
|
| 459 |
|
|
static bfd_boolean
|
| 460 |
|
|
open8_stub_is_required_for_16_bit_reloc (bfd_vma relocation)
|
| 461 |
|
|
{
|
| 462 |
|
|
return (relocation >= 0x020000);
|
| 463 |
|
|
}
|
| 464 |
|
|
|
| 465 |
|
|
/* Perform a single relocation. By default we use the standard BFD
|
| 466 |
|
|
routines, but a few relocs, we have to do them ourselves. */
|
| 467 |
|
|
|
| 468 |
|
|
static bfd_reloc_status_type
|
| 469 |
|
|
open8_final_link_relocate (reloc_howto_type * howto,
|
| 470 |
|
|
bfd * input_bfd,
|
| 471 |
|
|
asection * input_section,
|
| 472 |
|
|
bfd_byte * contents,
|
| 473 |
|
|
Elf_Internal_Rela * rel,
|
| 474 |
|
|
bfd_vma relocation)
|
| 475 |
|
|
{
|
| 476 |
|
|
bfd_reloc_status_type r = bfd_reloc_ok;
|
| 477 |
|
|
bfd_vma x;
|
| 478 |
|
|
bfd_signed_vma srel;
|
| 479 |
|
|
bfd_signed_vma reloc_addr;
|
| 480 |
|
|
|
| 481 |
|
|
/* Absolute addr of the reloc in the final excecutable. */
|
| 482 |
|
|
reloc_addr = rel->r_offset + input_section->output_section->vma
|
| 483 |
|
|
+ input_section->output_offset;
|
| 484 |
|
|
|
| 485 |
|
|
switch (howto->type)
|
| 486 |
|
|
{
|
| 487 |
|
|
case R_OPEN8_PCREL:
|
| 488 |
|
|
contents += rel->r_offset;
|
| 489 |
|
|
srel = (bfd_signed_vma) relocation;
|
| 490 |
|
|
srel += rel->r_addend;
|
| 491 |
|
|
|
| 492 |
|
|
if (srel > ((1 << 8) - 1) || (srel < - (1 << 7)))
|
| 493 |
|
|
return bfd_reloc_overflow;
|
| 494 |
|
|
x = bfd_get_16 (input_bfd, contents);
|
| 495 |
|
|
x = (x & 0xff00) | (srel & 0xff);
|
| 496 |
|
|
bfd_put_16 (input_bfd, x, contents);
|
| 497 |
|
|
break;
|
| 498 |
|
|
|
| 499 |
|
|
case R_OPEN8_CALL:
|
| 500 |
|
|
contents += rel->r_offset;
|
| 501 |
|
|
srel = (bfd_signed_vma) relocation + rel->r_addend;
|
| 502 |
|
|
bfd_put_16 (input_bfd, srel, contents);
|
| 503 |
|
|
break;
|
| 504 |
|
|
|
| 505 |
|
|
case R_OPEN8_LO8_LDI:
|
| 506 |
|
|
contents += rel->r_offset;
|
| 507 |
|
|
srel = (bfd_signed_vma) relocation + rel->r_addend;
|
| 508 |
|
|
x = bfd_get_16 (input_bfd, contents);
|
| 509 |
|
|
x = (x & 0xff00) | (srel & 0x0ff);
|
| 510 |
|
|
bfd_put_16 (input_bfd, x, contents);
|
| 511 |
|
|
break;
|
| 512 |
|
|
|
| 513 |
|
|
case R_OPEN8_HI8_LDI:
|
| 514 |
|
|
contents += rel->r_offset;
|
| 515 |
|
|
srel = (bfd_signed_vma) relocation + rel->r_addend;
|
| 516 |
|
|
x = bfd_get_16 (input_bfd, contents);
|
| 517 |
|
|
x = (x & 0xff00) | ((srel >> 4) & 0x0ff);
|
| 518 |
|
|
bfd_put_16 (input_bfd, x, contents);
|
| 519 |
|
|
break;
|
| 520 |
|
|
|
| 521 |
|
|
case R_OPEN8_LO8_LDI_NEG:
|
| 522 |
|
|
contents += rel->r_offset;
|
| 523 |
|
|
srel = (bfd_signed_vma) relocation + rel->r_addend;
|
| 524 |
|
|
srel = -srel;
|
| 525 |
|
|
x = bfd_get_16 (input_bfd, contents);
|
| 526 |
|
|
x = (x & 0xff00) | (srel & 0x0ff);
|
| 527 |
|
|
bfd_put_16 (input_bfd, x, contents);
|
| 528 |
|
|
break;
|
| 529 |
|
|
|
| 530 |
|
|
case R_OPEN8_HI8_LDI_NEG:
|
| 531 |
|
|
contents += rel->r_offset;
|
| 532 |
|
|
srel = (bfd_signed_vma) relocation + rel->r_addend;
|
| 533 |
|
|
srel = -srel;
|
| 534 |
|
|
x = bfd_get_16 (input_bfd, contents);
|
| 535 |
|
|
x = (x & 0xff00) | ((srel >> 4) & 0x0ff);
|
| 536 |
|
|
bfd_put_16 (input_bfd, x, contents);
|
| 537 |
|
|
break;
|
| 538 |
|
|
|
| 539 |
|
|
default:
|
| 540 |
|
|
r = _bfd_final_link_relocate (howto, input_bfd, input_section,
|
| 541 |
|
|
contents, rel->r_offset,
|
| 542 |
|
|
relocation, rel->r_addend);
|
| 543 |
|
|
}
|
| 544 |
|
|
|
| 545 |
|
|
return r;
|
| 546 |
|
|
}
|
| 547 |
|
|
|
| 548 |
|
|
/* Relocate an OPEN8 ELF section. */
|
| 549 |
|
|
|
| 550 |
|
|
static bfd_boolean
|
| 551 |
|
|
elf32_open8_relocate_section (bfd *output_bfd ATTRIBUTE_UNUSED,
|
| 552 |
|
|
struct bfd_link_info *info,
|
| 553 |
|
|
bfd *input_bfd,
|
| 554 |
|
|
asection *input_section,
|
| 555 |
|
|
bfd_byte *contents,
|
| 556 |
|
|
Elf_Internal_Rela *relocs,
|
| 557 |
|
|
Elf_Internal_Sym *local_syms,
|
| 558 |
|
|
asection **local_sections)
|
| 559 |
|
|
{
|
| 560 |
|
|
Elf_Internal_Shdr * symtab_hdr;
|
| 561 |
|
|
struct elf_link_hash_entry ** sym_hashes;
|
| 562 |
|
|
Elf_Internal_Rela * rel;
|
| 563 |
|
|
Elf_Internal_Rela * relend;
|
| 564 |
|
|
struct elf32_open8_link_hash_table * htab = open8_link_hash_table (info);
|
| 565 |
|
|
|
| 566 |
|
|
if (htab == NULL)
|
| 567 |
|
|
return FALSE;
|
| 568 |
|
|
|
| 569 |
|
|
symtab_hdr = & elf_tdata (input_bfd)->symtab_hdr;
|
| 570 |
|
|
sym_hashes = elf_sym_hashes (input_bfd);
|
| 571 |
|
|
relend = relocs + input_section->reloc_count;
|
| 572 |
|
|
|
| 573 |
|
|
for (rel = relocs; rel < relend; rel ++)
|
| 574 |
|
|
{
|
| 575 |
|
|
reloc_howto_type * howto;
|
| 576 |
|
|
unsigned long r_symndx;
|
| 577 |
|
|
Elf_Internal_Sym * sym;
|
| 578 |
|
|
asection * sec;
|
| 579 |
|
|
struct elf_link_hash_entry * h;
|
| 580 |
|
|
bfd_vma relocation;
|
| 581 |
|
|
bfd_reloc_status_type r;
|
| 582 |
|
|
const char * name;
|
| 583 |
|
|
int r_type;
|
| 584 |
|
|
|
| 585 |
|
|
r_type = ELF32_R_TYPE (rel->r_info);
|
| 586 |
|
|
r_symndx = ELF32_R_SYM (rel->r_info);
|
| 587 |
|
|
howto = elf_open8_howto_table + r_type;
|
| 588 |
|
|
h = NULL;
|
| 589 |
|
|
sym = NULL;
|
| 590 |
|
|
sec = NULL;
|
| 591 |
|
|
|
| 592 |
|
|
if (r_symndx < symtab_hdr->sh_info)
|
| 593 |
|
|
{
|
| 594 |
|
|
sym = local_syms + r_symndx;
|
| 595 |
|
|
sec = local_sections [r_symndx];
|
| 596 |
|
|
relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel);
|
| 597 |
|
|
|
| 598 |
|
|
name = bfd_elf_string_from_elf_section
|
| 599 |
|
|
(input_bfd, symtab_hdr->sh_link, sym->st_name);
|
| 600 |
|
|
name = (name == NULL) ? bfd_section_name (input_bfd, sec) : name;
|
| 601 |
|
|
}
|
| 602 |
|
|
else
|
| 603 |
|
|
{
|
| 604 |
|
|
bfd_boolean unresolved_reloc, warned;
|
| 605 |
|
|
|
| 606 |
|
|
RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
|
| 607 |
|
|
r_symndx, symtab_hdr, sym_hashes,
|
| 608 |
|
|
h, sec, relocation,
|
| 609 |
|
|
unresolved_reloc, warned);
|
| 610 |
|
|
|
| 611 |
|
|
name = h->root.root.string;
|
| 612 |
|
|
}
|
| 613 |
|
|
|
| 614 |
|
|
if (sec != NULL && elf_discarded_section (sec))
|
| 615 |
|
|
RELOC_AGAINST_DISCARDED_SECTION (info, input_bfd, input_section,
|
| 616 |
|
|
rel, relend, howto, contents);
|
| 617 |
|
|
|
| 618 |
|
|
if (info->relocatable)
|
| 619 |
|
|
continue;
|
| 620 |
|
|
|
| 621 |
|
|
r = open8_final_link_relocate (howto, input_bfd, input_section,
|
| 622 |
|
|
contents, rel, relocation);
|
| 623 |
|
|
|
| 624 |
|
|
if (r != bfd_reloc_ok)
|
| 625 |
|
|
{
|
| 626 |
|
|
const char * msg = (const char *) NULL;
|
| 627 |
|
|
|
| 628 |
|
|
switch (r)
|
| 629 |
|
|
{
|
| 630 |
|
|
case bfd_reloc_overflow:
|
| 631 |
|
|
r = info->callbacks->reloc_overflow
|
| 632 |
|
|
(info, (h ? &h->root : NULL),
|
| 633 |
|
|
name, howto->name, (bfd_vma) 0,
|
| 634 |
|
|
input_bfd, input_section, rel->r_offset);
|
| 635 |
|
|
break;
|
| 636 |
|
|
|
| 637 |
|
|
case bfd_reloc_undefined:
|
| 638 |
|
|
r = info->callbacks->undefined_symbol
|
| 639 |
|
|
(info, name, input_bfd, input_section, rel->r_offset, TRUE);
|
| 640 |
|
|
break;
|
| 641 |
|
|
|
| 642 |
|
|
case bfd_reloc_outofrange:
|
| 643 |
|
|
msg = _("internal error: out of range error");
|
| 644 |
|
|
break;
|
| 645 |
|
|
|
| 646 |
|
|
case bfd_reloc_notsupported:
|
| 647 |
|
|
msg = _("internal error: unsupported relocation error");
|
| 648 |
|
|
break;
|
| 649 |
|
|
|
| 650 |
|
|
case bfd_reloc_dangerous:
|
| 651 |
|
|
msg = _("internal error: dangerous relocation");
|
| 652 |
|
|
break;
|
| 653 |
|
|
|
| 654 |
|
|
default:
|
| 655 |
|
|
msg = _("internal error: unknown error");
|
| 656 |
|
|
break;
|
| 657 |
|
|
}
|
| 658 |
|
|
|
| 659 |
|
|
if (msg)
|
| 660 |
|
|
r = info->callbacks->warning
|
| 661 |
|
|
(info, msg, name, input_bfd, input_section, rel->r_offset);
|
| 662 |
|
|
|
| 663 |
|
|
if (! r)
|
| 664 |
|
|
return FALSE;
|
| 665 |
|
|
}
|
| 666 |
|
|
}
|
| 667 |
|
|
|
| 668 |
|
|
return TRUE;
|
| 669 |
|
|
}
|
| 670 |
|
|
|
| 671 |
|
|
/* The final processing done just before writing out a OPEN8 ELF object
|
| 672 |
|
|
file. This gets the OPEN8 architecture right based on the machine
|
| 673 |
|
|
number. */
|
| 674 |
|
|
|
| 675 |
|
|
static void
|
| 676 |
|
|
bfd_elf_open8_final_write_processing (bfd *abfd,
|
| 677 |
|
|
bfd_boolean linker ATTRIBUTE_UNUSED)
|
| 678 |
|
|
{
|
| 679 |
|
|
unsigned long val;
|
| 680 |
|
|
|
| 681 |
|
|
switch (bfd_get_mach (abfd))
|
| 682 |
|
|
{
|
| 683 |
|
|
default:
|
| 684 |
|
|
case bfd_mach_open8_1:
|
| 685 |
|
|
val = E_OPEN8_MACH_OPEN8_1;
|
| 686 |
|
|
break;
|
| 687 |
|
|
}
|
| 688 |
|
|
|
| 689 |
|
|
elf_elfheader (abfd)->e_machine = EM_OPEN8;
|
| 690 |
|
|
elf_elfheader (abfd)->e_flags &= ~ EF_OPEN8_MACH;
|
| 691 |
|
|
elf_elfheader (abfd)->e_flags |= val;
|
| 692 |
|
|
elf_elfheader (abfd)->e_flags |= EF_OPEN8_LINKRELAX_PREPARED;
|
| 693 |
|
|
}
|
| 694 |
|
|
|
| 695 |
|
|
/* Set the right machine number. */
|
| 696 |
|
|
|
| 697 |
|
|
static bfd_boolean
|
| 698 |
|
|
elf32_open8_object_p (bfd *abfd)
|
| 699 |
|
|
{
|
| 700 |
|
|
unsigned int e_set = bfd_mach_open8_1;
|
| 701 |
|
|
|
| 702 |
|
|
if (elf_elfheader (abfd)->e_machine == EM_OPEN8)
|
| 703 |
|
|
{
|
| 704 |
|
|
int e_mach = elf_elfheader (abfd)->e_flags & EF_OPEN8_MACH;
|
| 705 |
|
|
|
| 706 |
|
|
switch (e_mach)
|
| 707 |
|
|
{
|
| 708 |
|
|
default:
|
| 709 |
|
|
case E_OPEN8_MACH_OPEN8_1:
|
| 710 |
|
|
e_set = bfd_mach_open8_1;
|
| 711 |
|
|
break;
|
| 712 |
|
|
|
| 713 |
|
|
}
|
| 714 |
|
|
}
|
| 715 |
|
|
return bfd_default_set_arch_mach (abfd, bfd_arch_open8,
|
| 716 |
|
|
e_set);
|
| 717 |
|
|
}
|
| 718 |
|
|
|
| 719 |
|
|
|
| 720 |
|
|
/* Delete some bytes from a section while changing the size of an instruction.
|
| 721 |
|
|
The parameter "addr" denotes the section-relative offset pointing just
|
| 722 |
|
|
behind the shrinked instruction. "addr+count" point at the first
|
| 723 |
|
|
byte just behind the original unshrinked instruction. */
|
| 724 |
|
|
|
| 725 |
|
|
static bfd_boolean
|
| 726 |
|
|
elf32_open8_relax_delete_bytes (bfd *abfd,
|
| 727 |
|
|
asection *sec,
|
| 728 |
|
|
bfd_vma addr,
|
| 729 |
|
|
int count)
|
| 730 |
|
|
{
|
| 731 |
|
|
Elf_Internal_Shdr *symtab_hdr;
|
| 732 |
|
|
unsigned int sec_shndx;
|
| 733 |
|
|
bfd_byte *contents;
|
| 734 |
|
|
Elf_Internal_Rela *irel, *irelend;
|
| 735 |
|
|
Elf_Internal_Sym *isym;
|
| 736 |
|
|
Elf_Internal_Sym *isymbuf = NULL;
|
| 737 |
|
|
bfd_vma toaddr;
|
| 738 |
|
|
struct elf_link_hash_entry **sym_hashes;
|
| 739 |
|
|
struct elf_link_hash_entry **end_hashes;
|
| 740 |
|
|
unsigned int symcount;
|
| 741 |
|
|
|
| 742 |
|
|
symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
|
| 743 |
|
|
sec_shndx = _bfd_elf_section_from_bfd_section (abfd, sec);
|
| 744 |
|
|
contents = elf_section_data (sec)->this_hdr.contents;
|
| 745 |
|
|
|
| 746 |
|
|
toaddr = sec->size;
|
| 747 |
|
|
|
| 748 |
|
|
irel = elf_section_data (sec)->relocs;
|
| 749 |
|
|
irelend = irel + sec->reloc_count;
|
| 750 |
|
|
|
| 751 |
|
|
/* Actually delete the bytes. */
|
| 752 |
|
|
if (toaddr - addr - count > 0)
|
| 753 |
|
|
memmove (contents + addr, contents + addr + count,
|
| 754 |
|
|
(size_t) (toaddr - addr - count));
|
| 755 |
|
|
sec->size -= count;
|
| 756 |
|
|
|
| 757 |
|
|
/* Adjust all the reloc addresses. */
|
| 758 |
|
|
for (irel = elf_section_data (sec)->relocs; irel < irelend; irel++)
|
| 759 |
|
|
{
|
| 760 |
|
|
bfd_vma old_reloc_address;
|
| 761 |
|
|
|
| 762 |
|
|
old_reloc_address = (sec->output_section->vma
|
| 763 |
|
|
+ sec->output_offset + irel->r_offset);
|
| 764 |
|
|
|
| 765 |
|
|
/* Get the new reloc address. */
|
| 766 |
|
|
if ((irel->r_offset > addr
|
| 767 |
|
|
&& irel->r_offset < toaddr))
|
| 768 |
|
|
{
|
| 769 |
|
|
if (debug_relax)
|
| 770 |
|
|
printf ("Relocation at address 0x%x needs to be moved.\n"
|
| 771 |
|
|
"Old section offset: 0x%x, New section offset: 0x%x \n",
|
| 772 |
|
|
(unsigned int) old_reloc_address,
|
| 773 |
|
|
(unsigned int) irel->r_offset,
|
| 774 |
|
|
(unsigned int) ((irel->r_offset) - count));
|
| 775 |
|
|
|
| 776 |
|
|
irel->r_offset -= count;
|
| 777 |
|
|
}
|
| 778 |
|
|
|
| 779 |
|
|
}
|
| 780 |
|
|
|
| 781 |
|
|
/* The reloc's own addresses are now ok. However, we need to readjust
|
| 782 |
|
|
the reloc's addend, i.e., the reloc's value if two conditions are met:
|
| 783 |
|
|
1.) the reloc is relative to a symbol in this section that
|
| 784 |
|
|
is located in front of the shrinked instruction
|
| 785 |
|
|
2.) symbol plus addend end up behind the shrinked instruction.
|
| 786 |
|
|
|
| 787 |
|
|
The most common case where this happens are relocs relative to
|
| 788 |
|
|
the section-start symbol.
|
| 789 |
|
|
|
| 790 |
|
|
This step needs to be done for all of the sections of the bfd. */
|
| 791 |
|
|
|
| 792 |
|
|
{
|
| 793 |
|
|
struct bfd_section *isec;
|
| 794 |
|
|
|
| 795 |
|
|
for (isec = abfd->sections; isec; isec = isec->next)
|
| 796 |
|
|
{
|
| 797 |
|
|
bfd_vma symval;
|
| 798 |
|
|
bfd_vma shrinked_insn_address;
|
| 799 |
|
|
|
| 800 |
|
|
shrinked_insn_address = (sec->output_section->vma
|
| 801 |
|
|
+ sec->output_offset + addr - count);
|
| 802 |
|
|
|
| 803 |
|
|
irelend = elf_section_data (isec)->relocs + isec->reloc_count;
|
| 804 |
|
|
for (irel = elf_section_data (isec)->relocs;
|
| 805 |
|
|
irel < irelend;
|
| 806 |
|
|
irel++)
|
| 807 |
|
|
{
|
| 808 |
|
|
/* Read this BFD's local symbols if we haven't done
|
| 809 |
|
|
so already. */
|
| 810 |
|
|
if (isymbuf == NULL && symtab_hdr->sh_info != 0)
|
| 811 |
|
|
{
|
| 812 |
|
|
isymbuf = (Elf_Internal_Sym *) symtab_hdr->contents;
|
| 813 |
|
|
if (isymbuf == NULL)
|
| 814 |
|
|
isymbuf = bfd_elf_get_elf_syms (abfd, symtab_hdr,
|
| 815 |
|
|
symtab_hdr->sh_info, 0,
|
| 816 |
|
|
NULL, NULL, NULL);
|
| 817 |
|
|
if (isymbuf == NULL)
|
| 818 |
|
|
return FALSE;
|
| 819 |
|
|
}
|
| 820 |
|
|
|
| 821 |
|
|
/* Get the value of the symbol referred to by the reloc. */
|
| 822 |
|
|
if (ELF32_R_SYM (irel->r_info) < symtab_hdr->sh_info)
|
| 823 |
|
|
{
|
| 824 |
|
|
/* A local symbol. */
|
| 825 |
|
|
asection *sym_sec;
|
| 826 |
|
|
|
| 827 |
|
|
isym = isymbuf + ELF32_R_SYM (irel->r_info);
|
| 828 |
|
|
sym_sec = bfd_section_from_elf_index (abfd, isym->st_shndx);
|
| 829 |
|
|
symval = isym->st_value;
|
| 830 |
|
|
/* If the reloc is absolute, it will not have
|
| 831 |
|
|
a symbol or section associated with it. */
|
| 832 |
|
|
if (sym_sec == sec)
|
| 833 |
|
|
{
|
| 834 |
|
|
symval += sym_sec->output_section->vma
|
| 835 |
|
|
+ sym_sec->output_offset;
|
| 836 |
|
|
|
| 837 |
|
|
if (debug_relax)
|
| 838 |
|
|
printf ("Checking if the relocation's "
|
| 839 |
|
|
"addend needs corrections.\n"
|
| 840 |
|
|
"Address of anchor symbol: 0x%x \n"
|
| 841 |
|
|
"Address of relocation target: 0x%x \n"
|
| 842 |
|
|
"Address of relaxed insn: 0x%x \n",
|
| 843 |
|
|
(unsigned int) symval,
|
| 844 |
|
|
(unsigned int) (symval + irel->r_addend),
|
| 845 |
|
|
(unsigned int) shrinked_insn_address);
|
| 846 |
|
|
|
| 847 |
|
|
if (symval <= shrinked_insn_address
|
| 848 |
|
|
&& (symval + irel->r_addend) > shrinked_insn_address)
|
| 849 |
|
|
{
|
| 850 |
|
|
irel->r_addend -= count;
|
| 851 |
|
|
|
| 852 |
|
|
if (debug_relax)
|
| 853 |
|
|
printf ("Relocation's addend needed to be fixed \n");
|
| 854 |
|
|
}
|
| 855 |
|
|
}
|
| 856 |
|
|
/* else, reference symbol is absolute.
|
| 857 |
|
|
No adjustment needed. */
|
| 858 |
|
|
}
|
| 859 |
|
|
/* else, reference symbol is extern. No need for adjusting
|
| 860 |
|
|
the addend. */
|
| 861 |
|
|
}
|
| 862 |
|
|
}
|
| 863 |
|
|
}
|
| 864 |
|
|
|
| 865 |
|
|
/* Adjust the local symbols defined in this section. */
|
| 866 |
|
|
isym = (Elf_Internal_Sym *) symtab_hdr->contents;
|
| 867 |
|
|
/* Fix PR 9841, there may be no local symbols. */
|
| 868 |
|
|
if (isym != NULL)
|
| 869 |
|
|
{
|
| 870 |
|
|
Elf_Internal_Sym *isymend;
|
| 871 |
|
|
|
| 872 |
|
|
isymend = isym + symtab_hdr->sh_info;
|
| 873 |
|
|
for (; isym < isymend; isym++)
|
| 874 |
|
|
{
|
| 875 |
|
|
if (isym->st_shndx == sec_shndx
|
| 876 |
|
|
&& isym->st_value > addr
|
| 877 |
|
|
&& isym->st_value < toaddr)
|
| 878 |
|
|
isym->st_value -= count;
|
| 879 |
|
|
}
|
| 880 |
|
|
}
|
| 881 |
|
|
|
| 882 |
|
|
/* Now adjust the global symbols defined in this section. */
|
| 883 |
|
|
symcount = (symtab_hdr->sh_size / sizeof (Elf32_External_Sym)
|
| 884 |
|
|
- symtab_hdr->sh_info);
|
| 885 |
|
|
sym_hashes = elf_sym_hashes (abfd);
|
| 886 |
|
|
end_hashes = sym_hashes + symcount;
|
| 887 |
|
|
for (; sym_hashes < end_hashes; sym_hashes++)
|
| 888 |
|
|
{
|
| 889 |
|
|
struct elf_link_hash_entry *sym_hash = *sym_hashes;
|
| 890 |
|
|
if ((sym_hash->root.type == bfd_link_hash_defined
|
| 891 |
|
|
|| sym_hash->root.type == bfd_link_hash_defweak)
|
| 892 |
|
|
&& sym_hash->root.u.def.section == sec
|
| 893 |
|
|
&& sym_hash->root.u.def.value > addr
|
| 894 |
|
|
&& sym_hash->root.u.def.value < toaddr)
|
| 895 |
|
|
{
|
| 896 |
|
|
sym_hash->root.u.def.value -= count;
|
| 897 |
|
|
}
|
| 898 |
|
|
}
|
| 899 |
|
|
|
| 900 |
|
|
return TRUE;
|
| 901 |
|
|
}
|
| 902 |
|
|
|
| 903 |
|
|
/* This function handles relaxing for the open8.
|
| 904 |
|
|
Many important relaxing opportunities within functions are already
|
| 905 |
|
|
realized by the compiler itself.
|
| 906 |
|
|
Here we try to replace branch followed by jump with a reverse branch.
|
| 907 |
|
|
As well we now optimize sequences of
|
| 908 |
|
|
- call/rcall function
|
| 909 |
|
|
- ret
|
| 910 |
|
|
to yield
|
| 911 |
|
|
- jmp/ function
|
| 912 |
|
|
- ret
|
| 913 |
|
|
. In case that within a sequence
|
| 914 |
|
|
- jmp/rjmp label
|
| 915 |
|
|
- ret
|
| 916 |
|
|
the ret could no longer be reached it is optimized away. In order
|
| 917 |
|
|
to check if the ret is no longer needed, it is checked that the ret's address
|
| 918 |
|
|
is not the target of a branch or jump within the same section, it is checked
|
| 919 |
|
|
that there is no skip instruction before the jmp/rjmp and that there
|
| 920 |
|
|
is no local or global label placed at the address of the ret.
|
| 921 |
|
|
|
| 922 |
|
|
We refrain from relaxing within sections ".vectors" and
|
| 923 |
|
|
".jumptables" in order to maintain the position of the instructions.
|
| 924 |
|
|
There, however, we substitute jmp/call by a sequence rjmp,nop/rcall,nop
|
| 925 |
|
|
if possible. (In the future, one could possibly use the space of the nop
|
| 926 |
|
|
for the first instruction of the irq service function.)
|
| 927 |
|
|
|
| 928 |
|
|
*/
|
| 929 |
|
|
|
| 930 |
|
|
static bfd_boolean
|
| 931 |
|
|
elf32_open8_relax_section (bfd *abfd,
|
| 932 |
|
|
asection *sec,
|
| 933 |
|
|
struct bfd_link_info *link_info,
|
| 934 |
|
|
bfd_boolean *again)
|
| 935 |
|
|
{
|
| 936 |
|
|
Elf_Internal_Shdr *symtab_hdr;
|
| 937 |
|
|
Elf_Internal_Rela *internal_relocs;
|
| 938 |
|
|
Elf_Internal_Rela *irel, *irelend;
|
| 939 |
|
|
bfd_byte *contents = NULL;
|
| 940 |
|
|
Elf_Internal_Sym *isymbuf = NULL;
|
| 941 |
|
|
struct elf32_open8_link_hash_table *htab;
|
| 942 |
|
|
|
| 943 |
|
|
if (link_info->relocatable)
|
| 944 |
|
|
(*link_info->callbacks->einfo)
|
| 945 |
|
|
(_("%P%F: --relax and -r may not be used together\n"));
|
| 946 |
|
|
|
| 947 |
|
|
/* TODO - MAJOR REWORK NEEDED HERE!!!
|
| 948 |
|
|
This code is AVR relaxation, need open8 version. */
|
| 949 |
|
|
return FALSE;
|
| 950 |
|
|
|
| 951 |
|
|
htab = open8_link_hash_table (link_info);
|
| 952 |
|
|
if (htab == NULL)
|
| 953 |
|
|
return FALSE;
|
| 954 |
|
|
|
| 955 |
|
|
/* Assume nothing changes. */
|
| 956 |
|
|
*again = FALSE;
|
| 957 |
|
|
|
| 958 |
|
|
if ((!htab->no_stubs) && (sec == htab->stub_sec))
|
| 959 |
|
|
{
|
| 960 |
|
|
/* We are just relaxing the stub section.
|
| 961 |
|
|
Let's calculate the size needed again. */
|
| 962 |
|
|
bfd_size_type last_estimated_stub_section_size = htab->stub_sec->size;
|
| 963 |
|
|
|
| 964 |
|
|
if (debug_relax)
|
| 965 |
|
|
printf ("Relaxing the stub section. Size prior to this pass: %i\n",
|
| 966 |
|
|
(int) last_estimated_stub_section_size);
|
| 967 |
|
|
|
| 968 |
|
|
elf32_open8_size_stubs (htab->stub_sec->output_section->owner,
|
| 969 |
|
|
link_info, FALSE);
|
| 970 |
|
|
|
| 971 |
|
|
/* Check if the number of trampolines changed. */
|
| 972 |
|
|
if (last_estimated_stub_section_size != htab->stub_sec->size)
|
| 973 |
|
|
*again = TRUE;
|
| 974 |
|
|
|
| 975 |
|
|
if (debug_relax)
|
| 976 |
|
|
printf ("Size of stub section after this pass: %i\n",
|
| 977 |
|
|
(int) htab->stub_sec->size);
|
| 978 |
|
|
|
| 979 |
|
|
return TRUE;
|
| 980 |
|
|
}
|
| 981 |
|
|
|
| 982 |
|
|
/* We don't have to do anything for a relocatable link, if
|
| 983 |
|
|
this section does not have relocs, or if this is not a
|
| 984 |
|
|
code section. */
|
| 985 |
|
|
if (link_info->relocatable
|
| 986 |
|
|
|| (sec->flags & SEC_RELOC) == 0
|
| 987 |
|
|
|| sec->reloc_count == 0
|
| 988 |
|
|
|| (sec->flags & SEC_CODE) == 0)
|
| 989 |
|
|
return TRUE;
|
| 990 |
|
|
|
| 991 |
|
|
/* Check if the object file to relax uses internal symbols so that we
|
| 992 |
|
|
could fix up the relocations. */
|
| 993 |
|
|
if (!(elf_elfheader (abfd)->e_flags & EF_OPEN8_LINKRELAX_PREPARED))
|
| 994 |
|
|
return TRUE;
|
| 995 |
|
|
|
| 996 |
|
|
symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
|
| 997 |
|
|
|
| 998 |
|
|
/* Get a copy of the native relocations. */
|
| 999 |
|
|
internal_relocs = (_bfd_elf_link_read_relocs
|
| 1000 |
|
|
(abfd, sec, NULL, NULL, link_info->keep_memory));
|
| 1001 |
|
|
if (internal_relocs == NULL)
|
| 1002 |
|
|
goto error_return;
|
| 1003 |
|
|
|
| 1004 |
|
|
/* Walk through the relocs looking for relaxing opportunities. */
|
| 1005 |
|
|
irelend = internal_relocs + sec->reloc_count;
|
| 1006 |
|
|
for (irel = internal_relocs; irel < irelend; irel++)
|
| 1007 |
|
|
{
|
| 1008 |
|
|
bfd_vma symval;
|
| 1009 |
|
|
|
| 1010 |
|
|
if ( ELF32_R_TYPE (irel->r_info) != R_OPEN8_PCREL
|
| 1011 |
|
|
&& ELF32_R_TYPE (irel->r_info) != R_OPEN8_CALL)
|
| 1012 |
|
|
continue;
|
| 1013 |
|
|
|
| 1014 |
|
|
/* Get the section contents if we haven't done so already. */
|
| 1015 |
|
|
if (contents == NULL)
|
| 1016 |
|
|
{
|
| 1017 |
|
|
/* Get cached copy if it exists. */
|
| 1018 |
|
|
if (elf_section_data (sec)->this_hdr.contents != NULL)
|
| 1019 |
|
|
contents = elf_section_data (sec)->this_hdr.contents;
|
| 1020 |
|
|
else
|
| 1021 |
|
|
{
|
| 1022 |
|
|
/* Go get them off disk. */
|
| 1023 |
|
|
if (! bfd_malloc_and_get_section (abfd, sec, &contents))
|
| 1024 |
|
|
goto error_return;
|
| 1025 |
|
|
}
|
| 1026 |
|
|
}
|
| 1027 |
|
|
|
| 1028 |
|
|
/* Read this BFD's local symbols if we haven't done so already. */
|
| 1029 |
|
|
if (isymbuf == NULL && symtab_hdr->sh_info != 0)
|
| 1030 |
|
|
{
|
| 1031 |
|
|
isymbuf = (Elf_Internal_Sym *) symtab_hdr->contents;
|
| 1032 |
|
|
if (isymbuf == NULL)
|
| 1033 |
|
|
isymbuf = bfd_elf_get_elf_syms (abfd, symtab_hdr,
|
| 1034 |
|
|
symtab_hdr->sh_info, 0,
|
| 1035 |
|
|
NULL, NULL, NULL);
|
| 1036 |
|
|
if (isymbuf == NULL)
|
| 1037 |
|
|
goto error_return;
|
| 1038 |
|
|
}
|
| 1039 |
|
|
|
| 1040 |
|
|
|
| 1041 |
|
|
/* Get the value of the symbol referred to by the reloc. */
|
| 1042 |
|
|
if (ELF32_R_SYM (irel->r_info) < symtab_hdr->sh_info)
|
| 1043 |
|
|
{
|
| 1044 |
|
|
/* A local symbol. */
|
| 1045 |
|
|
Elf_Internal_Sym *isym;
|
| 1046 |
|
|
asection *sym_sec;
|
| 1047 |
|
|
|
| 1048 |
|
|
isym = isymbuf + ELF32_R_SYM (irel->r_info);
|
| 1049 |
|
|
sym_sec = bfd_section_from_elf_index (abfd, isym->st_shndx);
|
| 1050 |
|
|
symval = isym->st_value;
|
| 1051 |
|
|
/* If the reloc is absolute, it will not have
|
| 1052 |
|
|
a symbol or section associated with it. */
|
| 1053 |
|
|
if (sym_sec)
|
| 1054 |
|
|
symval += sym_sec->output_section->vma
|
| 1055 |
|
|
+ sym_sec->output_offset;
|
| 1056 |
|
|
}
|
| 1057 |
|
|
else
|
| 1058 |
|
|
{
|
| 1059 |
|
|
unsigned long indx;
|
| 1060 |
|
|
struct elf_link_hash_entry *h;
|
| 1061 |
|
|
|
| 1062 |
|
|
/* An external symbol. */
|
| 1063 |
|
|
indx = ELF32_R_SYM (irel->r_info) - symtab_hdr->sh_info;
|
| 1064 |
|
|
h = elf_sym_hashes (abfd)[indx];
|
| 1065 |
|
|
BFD_ASSERT (h != NULL);
|
| 1066 |
|
|
if (h->root.type != bfd_link_hash_defined
|
| 1067 |
|
|
&& h->root.type != bfd_link_hash_defweak)
|
| 1068 |
|
|
/* This appears to be a reference to an undefined
|
| 1069 |
|
|
symbol. Just ignore it--it will be caught by the
|
| 1070 |
|
|
regular reloc processing. */
|
| 1071 |
|
|
continue;
|
| 1072 |
|
|
|
| 1073 |
|
|
symval = (h->root.u.def.value
|
| 1074 |
|
|
+ h->root.u.def.section->output_section->vma
|
| 1075 |
|
|
+ h->root.u.def.section->output_offset);
|
| 1076 |
|
|
}
|
| 1077 |
|
|
|
| 1078 |
|
|
/* For simplicity of coding, we are going to modify the section
|
| 1079 |
|
|
contents, the section relocs, and the BFD symbol table. We
|
| 1080 |
|
|
must tell the rest of the code not to free up this
|
| 1081 |
|
|
information. It would be possible to instead create a table
|
| 1082 |
|
|
of changes which have to be made, as is done in coff-mips.c;
|
| 1083 |
|
|
that would be more work, but would require less memory when
|
| 1084 |
|
|
the linker is run. */
|
| 1085 |
|
|
switch (ELF32_R_TYPE (irel->r_info))
|
| 1086 |
|
|
{
|
| 1087 |
|
|
|
| 1088 |
|
|
default:
|
| 1089 |
|
|
{
|
| 1090 |
|
|
unsigned char code_msb;
|
| 1091 |
|
|
unsigned char code_lsb;
|
| 1092 |
|
|
bfd_vma dot;
|
| 1093 |
|
|
|
| 1094 |
|
|
code_msb = bfd_get_8 (abfd, contents + irel->r_offset + 1);
|
| 1095 |
|
|
code_lsb = bfd_get_8 (abfd, contents + irel->r_offset + 0);
|
| 1096 |
|
|
|
| 1097 |
|
|
/* Get the address of this instruction. */
|
| 1098 |
|
|
dot = (sec->output_section->vma
|
| 1099 |
|
|
+ sec->output_offset + irel->r_offset);
|
| 1100 |
|
|
|
| 1101 |
|
|
/* Here we look for rcall/ret or call/ret sequences that could be
|
| 1102 |
|
|
safely replaced by rjmp/ret or jmp/ret. */
|
| 1103 |
|
|
if (((code_msb & 0xf0) == 0xd0)
|
| 1104 |
|
|
&& open8_replace_call_ret_sequences)
|
| 1105 |
|
|
{
|
| 1106 |
|
|
/* This insn is a rcall. */
|
| 1107 |
|
|
unsigned char next_insn_msb = 0;
|
| 1108 |
|
|
unsigned char next_insn_lsb = 0;
|
| 1109 |
|
|
|
| 1110 |
|
|
if (irel->r_offset + 3 < sec->size)
|
| 1111 |
|
|
{
|
| 1112 |
|
|
next_insn_msb =
|
| 1113 |
|
|
bfd_get_8 (abfd, contents + irel->r_offset + 3);
|
| 1114 |
|
|
next_insn_lsb =
|
| 1115 |
|
|
bfd_get_8 (abfd, contents + irel->r_offset + 2);
|
| 1116 |
|
|
}
|
| 1117 |
|
|
|
| 1118 |
|
|
if ((0x95 == next_insn_msb) && (0x08 == next_insn_lsb))
|
| 1119 |
|
|
{
|
| 1120 |
|
|
/* The next insn is a ret. We now convert the rcall insn
|
| 1121 |
|
|
into a rjmp instruction. */
|
| 1122 |
|
|
code_msb &= 0xef;
|
| 1123 |
|
|
bfd_put_8 (abfd, code_msb, contents + irel->r_offset + 1);
|
| 1124 |
|
|
if (debug_relax)
|
| 1125 |
|
|
printf ("converted rcall/ret sequence at address 0x%x"
|
| 1126 |
|
|
" into rjmp/ret sequence. Section is %s\n\n",
|
| 1127 |
|
|
(int) dot, sec->name);
|
| 1128 |
|
|
*again = TRUE;
|
| 1129 |
|
|
break;
|
| 1130 |
|
|
}
|
| 1131 |
|
|
}
|
| 1132 |
|
|
else if ((0x94 == (code_msb & 0xfe))
|
| 1133 |
|
|
&& (0x0e == (code_lsb & 0x0e))
|
| 1134 |
|
|
&& open8_replace_call_ret_sequences)
|
| 1135 |
|
|
{
|
| 1136 |
|
|
/* This insn is a call. */
|
| 1137 |
|
|
unsigned char next_insn_msb = 0;
|
| 1138 |
|
|
unsigned char next_insn_lsb = 0;
|
| 1139 |
|
|
|
| 1140 |
|
|
if (irel->r_offset + 5 < sec->size)
|
| 1141 |
|
|
{
|
| 1142 |
|
|
next_insn_msb =
|
| 1143 |
|
|
bfd_get_8 (abfd, contents + irel->r_offset + 5);
|
| 1144 |
|
|
next_insn_lsb =
|
| 1145 |
|
|
bfd_get_8 (abfd, contents + irel->r_offset + 4);
|
| 1146 |
|
|
}
|
| 1147 |
|
|
|
| 1148 |
|
|
if ((0x95 == next_insn_msb) && (0x08 == next_insn_lsb))
|
| 1149 |
|
|
{
|
| 1150 |
|
|
/* The next insn is a ret. We now convert the call insn
|
| 1151 |
|
|
into a jmp instruction. */
|
| 1152 |
|
|
|
| 1153 |
|
|
code_lsb &= 0xfd;
|
| 1154 |
|
|
bfd_put_8 (abfd, code_lsb, contents + irel->r_offset);
|
| 1155 |
|
|
if (debug_relax)
|
| 1156 |
|
|
printf ("converted call/ret sequence at address 0x%x"
|
| 1157 |
|
|
" into jmp/ret sequence. Section is %s\n\n",
|
| 1158 |
|
|
(int) dot, sec->name);
|
| 1159 |
|
|
*again = TRUE;
|
| 1160 |
|
|
break;
|
| 1161 |
|
|
}
|
| 1162 |
|
|
}
|
| 1163 |
|
|
else if ((0xc0 == (code_msb & 0xf0))
|
| 1164 |
|
|
|| ((0x94 == (code_msb & 0xfe))
|
| 1165 |
|
|
&& (0x0c == (code_lsb & 0x0e))))
|
| 1166 |
|
|
{
|
| 1167 |
|
|
/* This insn is a rjmp or a jmp. */
|
| 1168 |
|
|
unsigned char next_insn_msb = 0;
|
| 1169 |
|
|
unsigned char next_insn_lsb = 0;
|
| 1170 |
|
|
int insn_size;
|
| 1171 |
|
|
|
| 1172 |
|
|
if (0xc0 == (code_msb & 0xf0))
|
| 1173 |
|
|
insn_size = 2;
|
| 1174 |
|
|
else
|
| 1175 |
|
|
insn_size = 4;
|
| 1176 |
|
|
|
| 1177 |
|
|
if (irel->r_offset + insn_size + 1 < sec->size)
|
| 1178 |
|
|
{
|
| 1179 |
|
|
next_insn_msb =
|
| 1180 |
|
|
bfd_get_8 (abfd, contents + irel->r_offset
|
| 1181 |
|
|
+ insn_size + 1);
|
| 1182 |
|
|
next_insn_lsb =
|
| 1183 |
|
|
bfd_get_8 (abfd, contents + irel->r_offset
|
| 1184 |
|
|
+ insn_size);
|
| 1185 |
|
|
}
|
| 1186 |
|
|
|
| 1187 |
|
|
if ((0x95 == next_insn_msb) && (0x08 == next_insn_lsb))
|
| 1188 |
|
|
{
|
| 1189 |
|
|
/* The next insn is a ret. We possibly could delete
|
| 1190 |
|
|
this ret. First we need to check for preceeding
|
| 1191 |
|
|
sbis/sbic/sbrs or cpse "skip" instructions. */
|
| 1192 |
|
|
|
| 1193 |
|
|
int there_is_preceeding_non_skip_insn = 1;
|
| 1194 |
|
|
bfd_vma address_of_ret;
|
| 1195 |
|
|
|
| 1196 |
|
|
address_of_ret = dot + insn_size;
|
| 1197 |
|
|
|
| 1198 |
|
|
if (debug_relax && (insn_size == 2))
|
| 1199 |
|
|
printf ("found rjmp / ret sequence at address 0x%x\n",
|
| 1200 |
|
|
(int) dot);
|
| 1201 |
|
|
if (debug_relax && (insn_size == 4))
|
| 1202 |
|
|
printf ("found jmp / ret sequence at address 0x%x\n",
|
| 1203 |
|
|
(int) dot);
|
| 1204 |
|
|
|
| 1205 |
|
|
/* We have to make sure that there is a preceeding insn. */
|
| 1206 |
|
|
if (irel->r_offset >= 2)
|
| 1207 |
|
|
{
|
| 1208 |
|
|
unsigned char preceeding_msb;
|
| 1209 |
|
|
unsigned char preceeding_lsb;
|
| 1210 |
|
|
preceeding_msb =
|
| 1211 |
|
|
bfd_get_8 (abfd, contents + irel->r_offset - 1);
|
| 1212 |
|
|
preceeding_lsb =
|
| 1213 |
|
|
bfd_get_8 (abfd, contents + irel->r_offset - 2);
|
| 1214 |
|
|
|
| 1215 |
|
|
/* sbic. */
|
| 1216 |
|
|
if (0x99 == preceeding_msb)
|
| 1217 |
|
|
there_is_preceeding_non_skip_insn = 0;
|
| 1218 |
|
|
|
| 1219 |
|
|
/* sbis. */
|
| 1220 |
|
|
if (0x9b == preceeding_msb)
|
| 1221 |
|
|
there_is_preceeding_non_skip_insn = 0;
|
| 1222 |
|
|
|
| 1223 |
|
|
/* sbrc. */
|
| 1224 |
|
|
if ((0xfc == (preceeding_msb & 0xfe)
|
| 1225 |
|
|
&& (0x00 == (preceeding_lsb & 0x08))))
|
| 1226 |
|
|
there_is_preceeding_non_skip_insn = 0;
|
| 1227 |
|
|
|
| 1228 |
|
|
/* sbrs. */
|
| 1229 |
|
|
if ((0xfe == (preceeding_msb & 0xfe)
|
| 1230 |
|
|
&& (0x00 == (preceeding_lsb & 0x08))))
|
| 1231 |
|
|
there_is_preceeding_non_skip_insn = 0;
|
| 1232 |
|
|
|
| 1233 |
|
|
/* cpse. */
|
| 1234 |
|
|
if (0x10 == (preceeding_msb & 0xfc))
|
| 1235 |
|
|
there_is_preceeding_non_skip_insn = 0;
|
| 1236 |
|
|
|
| 1237 |
|
|
if (there_is_preceeding_non_skip_insn == 0)
|
| 1238 |
|
|
if (debug_relax)
|
| 1239 |
|
|
printf ("preceeding skip insn prevents deletion of"
|
| 1240 |
|
|
" ret insn at addr 0x%x in section %s\n",
|
| 1241 |
|
|
(int) dot + 2, sec->name);
|
| 1242 |
|
|
}
|
| 1243 |
|
|
else
|
| 1244 |
|
|
{
|
| 1245 |
|
|
/* There is no previous instruction. */
|
| 1246 |
|
|
there_is_preceeding_non_skip_insn = 0;
|
| 1247 |
|
|
}
|
| 1248 |
|
|
|
| 1249 |
|
|
if (there_is_preceeding_non_skip_insn)
|
| 1250 |
|
|
{
|
| 1251 |
|
|
/* We now only have to make sure that there is no
|
| 1252 |
|
|
local label defined at the address of the ret
|
| 1253 |
|
|
instruction and that there is no local relocation
|
| 1254 |
|
|
in this section pointing to the ret. */
|
| 1255 |
|
|
|
| 1256 |
|
|
int deleting_ret_is_safe = 1;
|
| 1257 |
|
|
unsigned int section_offset_of_ret_insn =
|
| 1258 |
|
|
irel->r_offset + insn_size;
|
| 1259 |
|
|
Elf_Internal_Sym *isym, *isymend;
|
| 1260 |
|
|
unsigned int sec_shndx;
|
| 1261 |
|
|
|
| 1262 |
|
|
sec_shndx =
|
| 1263 |
|
|
_bfd_elf_section_from_bfd_section (abfd, sec);
|
| 1264 |
|
|
|
| 1265 |
|
|
/* Check for local symbols. */
|
| 1266 |
|
|
isym = (Elf_Internal_Sym *) symtab_hdr->contents;
|
| 1267 |
|
|
isymend = isym + symtab_hdr->sh_info;
|
| 1268 |
|
|
/* PR 6019: There may not be any local symbols. */
|
| 1269 |
|
|
for (; isym != NULL && isym < isymend; isym++)
|
| 1270 |
|
|
{
|
| 1271 |
|
|
if (isym->st_value == section_offset_of_ret_insn
|
| 1272 |
|
|
&& isym->st_shndx == sec_shndx)
|
| 1273 |
|
|
{
|
| 1274 |
|
|
deleting_ret_is_safe = 0;
|
| 1275 |
|
|
if (debug_relax)
|
| 1276 |
|
|
printf ("local label prevents deletion of"
|
| 1277 |
|
|
"ret insn at address 0x%x\n",
|
| 1278 |
|
|
(int) dot + insn_size);
|
| 1279 |
|
|
}
|
| 1280 |
|
|
}
|
| 1281 |
|
|
|
| 1282 |
|
|
/* Now check for global symbols. */
|
| 1283 |
|
|
{
|
| 1284 |
|
|
int symcount;
|
| 1285 |
|
|
struct elf_link_hash_entry **sym_hashes;
|
| 1286 |
|
|
struct elf_link_hash_entry **end_hashes;
|
| 1287 |
|
|
|
| 1288 |
|
|
symcount = (symtab_hdr->sh_size
|
| 1289 |
|
|
/ sizeof (Elf32_External_Sym)
|
| 1290 |
|
|
- symtab_hdr->sh_info);
|
| 1291 |
|
|
sym_hashes = elf_sym_hashes (abfd);
|
| 1292 |
|
|
end_hashes = sym_hashes + symcount;
|
| 1293 |
|
|
for (; sym_hashes < end_hashes; sym_hashes++)
|
| 1294 |
|
|
{
|
| 1295 |
|
|
struct elf_link_hash_entry *sym_hash =
|
| 1296 |
|
|
*sym_hashes;
|
| 1297 |
|
|
if ((sym_hash->root.type == bfd_link_hash_defined
|
| 1298 |
|
|
|| sym_hash->root.type ==
|
| 1299 |
|
|
bfd_link_hash_defweak)
|
| 1300 |
|
|
&& sym_hash->root.u.def.section == sec
|
| 1301 |
|
|
&& (sym_hash->root.u.def.value
|
| 1302 |
|
|
== section_offset_of_ret_insn))
|
| 1303 |
|
|
{
|
| 1304 |
|
|
deleting_ret_is_safe = 0;
|
| 1305 |
|
|
if (debug_relax)
|
| 1306 |
|
|
printf ("global label prevents deletion of "
|
| 1307 |
|
|
"ret insn at address 0x%x\n",
|
| 1308 |
|
|
(int) dot + insn_size);
|
| 1309 |
|
|
}
|
| 1310 |
|
|
}
|
| 1311 |
|
|
}
|
| 1312 |
|
|
/* Now we check for relocations pointing to ret. */
|
| 1313 |
|
|
{
|
| 1314 |
|
|
Elf_Internal_Rela *rel;
|
| 1315 |
|
|
Elf_Internal_Rela *relend;
|
| 1316 |
|
|
|
| 1317 |
|
|
relend = elf_section_data (sec)->relocs
|
| 1318 |
|
|
+ sec->reloc_count;
|
| 1319 |
|
|
|
| 1320 |
|
|
for (rel = elf_section_data (sec)->relocs;
|
| 1321 |
|
|
rel < relend; rel++)
|
| 1322 |
|
|
{
|
| 1323 |
|
|
bfd_vma reloc_target = 0;
|
| 1324 |
|
|
|
| 1325 |
|
|
/* Read this BFD's local symbols if we haven't
|
| 1326 |
|
|
done so already. */
|
| 1327 |
|
|
if (isymbuf == NULL && symtab_hdr->sh_info != 0)
|
| 1328 |
|
|
{
|
| 1329 |
|
|
isymbuf = (Elf_Internal_Sym *)
|
| 1330 |
|
|
symtab_hdr->contents;
|
| 1331 |
|
|
if (isymbuf == NULL)
|
| 1332 |
|
|
isymbuf = bfd_elf_get_elf_syms
|
| 1333 |
|
|
(abfd,
|
| 1334 |
|
|
symtab_hdr,
|
| 1335 |
|
|
symtab_hdr->sh_info, 0,
|
| 1336 |
|
|
NULL, NULL, NULL);
|
| 1337 |
|
|
if (isymbuf == NULL)
|
| 1338 |
|
|
break;
|
| 1339 |
|
|
}
|
| 1340 |
|
|
|
| 1341 |
|
|
/* Get the value of the symbol referred to
|
| 1342 |
|
|
by the reloc. */
|
| 1343 |
|
|
if (ELF32_R_SYM (rel->r_info)
|
| 1344 |
|
|
< symtab_hdr->sh_info)
|
| 1345 |
|
|
{
|
| 1346 |
|
|
/* A local symbol. */
|
| 1347 |
|
|
asection *sym_sec;
|
| 1348 |
|
|
|
| 1349 |
|
|
isym = isymbuf
|
| 1350 |
|
|
+ ELF32_R_SYM (rel->r_info);
|
| 1351 |
|
|
sym_sec = bfd_section_from_elf_index
|
| 1352 |
|
|
(abfd, isym->st_shndx);
|
| 1353 |
|
|
symval = isym->st_value;
|
| 1354 |
|
|
|
| 1355 |
|
|
/* If the reloc is absolute, it will not
|
| 1356 |
|
|
have a symbol or section associated
|
| 1357 |
|
|
with it. */
|
| 1358 |
|
|
|
| 1359 |
|
|
if (sym_sec)
|
| 1360 |
|
|
{
|
| 1361 |
|
|
symval +=
|
| 1362 |
|
|
sym_sec->output_section->vma
|
| 1363 |
|
|
+ sym_sec->output_offset;
|
| 1364 |
|
|
reloc_target = symval + rel->r_addend;
|
| 1365 |
|
|
}
|
| 1366 |
|
|
else
|
| 1367 |
|
|
{
|
| 1368 |
|
|
reloc_target = symval + rel->r_addend;
|
| 1369 |
|
|
/* Reference symbol is absolute. */
|
| 1370 |
|
|
}
|
| 1371 |
|
|
}
|
| 1372 |
|
|
/* else, reference symbol is extern. */
|
| 1373 |
|
|
|
| 1374 |
|
|
if (address_of_ret == reloc_target)
|
| 1375 |
|
|
{
|
| 1376 |
|
|
deleting_ret_is_safe = 0;
|
| 1377 |
|
|
if (debug_relax)
|
| 1378 |
|
|
printf ("ret from "
|
| 1379 |
|
|
"rjmp/jmp ret sequence at address"
|
| 1380 |
|
|
" 0x%x could not be deleted. ret"
|
| 1381 |
|
|
" is target of a relocation.\n",
|
| 1382 |
|
|
(int) address_of_ret);
|
| 1383 |
|
|
}
|
| 1384 |
|
|
}
|
| 1385 |
|
|
}
|
| 1386 |
|
|
|
| 1387 |
|
|
if (deleting_ret_is_safe)
|
| 1388 |
|
|
{
|
| 1389 |
|
|
if (debug_relax)
|
| 1390 |
|
|
printf ("unreachable ret instruction "
|
| 1391 |
|
|
"at address 0x%x deleted.\n",
|
| 1392 |
|
|
(int) dot + insn_size);
|
| 1393 |
|
|
|
| 1394 |
|
|
/* Delete two bytes of data. */
|
| 1395 |
|
|
if (!elf32_open8_relax_delete_bytes (abfd,
|
| 1396 |
|
|
sec,
|
| 1397 |
|
|
irel->r_offset
|
| 1398 |
|
|
+ insn_size,
|
| 1399 |
|
|
2))
|
| 1400 |
|
|
goto error_return;
|
| 1401 |
|
|
|
| 1402 |
|
|
/* That will change things, so, we should relax
|
| 1403 |
|
|
again. Note that this is not required, and it
|
| 1404 |
|
|
may be slow. */
|
| 1405 |
|
|
*again = TRUE;
|
| 1406 |
|
|
break;
|
| 1407 |
|
|
}
|
| 1408 |
|
|
}
|
| 1409 |
|
|
|
| 1410 |
|
|
}
|
| 1411 |
|
|
}
|
| 1412 |
|
|
break;
|
| 1413 |
|
|
}
|
| 1414 |
|
|
}
|
| 1415 |
|
|
}
|
| 1416 |
|
|
|
| 1417 |
|
|
if (contents != NULL
|
| 1418 |
|
|
&& elf_section_data (sec)->this_hdr.contents != contents)
|
| 1419 |
|
|
{
|
| 1420 |
|
|
if (! link_info->keep_memory)
|
| 1421 |
|
|
free (contents);
|
| 1422 |
|
|
else
|
| 1423 |
|
|
{
|
| 1424 |
|
|
/* Cache the section contents for elf_link_input_bfd. */
|
| 1425 |
|
|
elf_section_data (sec)->this_hdr.contents = contents;
|
| 1426 |
|
|
}
|
| 1427 |
|
|
}
|
| 1428 |
|
|
|
| 1429 |
|
|
if (internal_relocs != NULL
|
| 1430 |
|
|
&& elf_section_data (sec)->relocs != internal_relocs)
|
| 1431 |
|
|
free (internal_relocs);
|
| 1432 |
|
|
|
| 1433 |
|
|
return TRUE;
|
| 1434 |
|
|
|
| 1435 |
|
|
error_return:
|
| 1436 |
|
|
if (isymbuf != NULL
|
| 1437 |
|
|
&& symtab_hdr->contents != (unsigned char *) isymbuf)
|
| 1438 |
|
|
free (isymbuf);
|
| 1439 |
|
|
if (contents != NULL
|
| 1440 |
|
|
&& elf_section_data (sec)->this_hdr.contents != contents)
|
| 1441 |
|
|
free (contents);
|
| 1442 |
|
|
if (internal_relocs != NULL
|
| 1443 |
|
|
&& elf_section_data (sec)->relocs != internal_relocs)
|
| 1444 |
|
|
free (internal_relocs);
|
| 1445 |
|
|
|
| 1446 |
|
|
return FALSE;
|
| 1447 |
|
|
}
|
| 1448 |
|
|
|
| 1449 |
|
|
/* This is a version of bfd_generic_get_relocated_section_contents
|
| 1450 |
|
|
which uses elf32_open8_relocate_section.
|
| 1451 |
|
|
|
| 1452 |
|
|
For open8 it's essentially a cut and paste taken from the H8300 port.
|
| 1453 |
|
|
The author of the relaxation support patch for open8 had absolutely no
|
| 1454 |
|
|
clue what is happening here but found out that this part of the code
|
| 1455 |
|
|
seems to be important. */
|
| 1456 |
|
|
|
| 1457 |
|
|
static bfd_byte *
|
| 1458 |
|
|
elf32_open8_get_relocated_section_contents (bfd *output_bfd,
|
| 1459 |
|
|
struct bfd_link_info *link_info,
|
| 1460 |
|
|
struct bfd_link_order *link_order,
|
| 1461 |
|
|
bfd_byte *data,
|
| 1462 |
|
|
bfd_boolean relocatable,
|
| 1463 |
|
|
asymbol **symbols)
|
| 1464 |
|
|
{
|
| 1465 |
|
|
Elf_Internal_Shdr *symtab_hdr;
|
| 1466 |
|
|
asection *input_section = link_order->u.indirect.section;
|
| 1467 |
|
|
bfd *input_bfd = input_section->owner;
|
| 1468 |
|
|
asection **sections = NULL;
|
| 1469 |
|
|
Elf_Internal_Rela *internal_relocs = NULL;
|
| 1470 |
|
|
Elf_Internal_Sym *isymbuf = NULL;
|
| 1471 |
|
|
|
| 1472 |
|
|
/* We only need to handle the case of relaxing, or of having a
|
| 1473 |
|
|
particular set of section contents, specially. */
|
| 1474 |
|
|
if (relocatable
|
| 1475 |
|
|
|| elf_section_data (input_section)->this_hdr.contents == NULL)
|
| 1476 |
|
|
return bfd_generic_get_relocated_section_contents (output_bfd, link_info,
|
| 1477 |
|
|
link_order, data,
|
| 1478 |
|
|
relocatable,
|
| 1479 |
|
|
symbols);
|
| 1480 |
|
|
symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr;
|
| 1481 |
|
|
|
| 1482 |
|
|
memcpy (data, elf_section_data (input_section)->this_hdr.contents,
|
| 1483 |
|
|
(size_t) input_section->size);
|
| 1484 |
|
|
|
| 1485 |
|
|
if ((input_section->flags & SEC_RELOC) != 0
|
| 1486 |
|
|
&& input_section->reloc_count > 0)
|
| 1487 |
|
|
{
|
| 1488 |
|
|
asection **secpp;
|
| 1489 |
|
|
Elf_Internal_Sym *isym, *isymend;
|
| 1490 |
|
|
bfd_size_type amt;
|
| 1491 |
|
|
|
| 1492 |
|
|
internal_relocs = (_bfd_elf_link_read_relocs
|
| 1493 |
|
|
(input_bfd, input_section, NULL, NULL, FALSE));
|
| 1494 |
|
|
if (internal_relocs == NULL)
|
| 1495 |
|
|
goto error_return;
|
| 1496 |
|
|
|
| 1497 |
|
|
if (symtab_hdr->sh_info != 0)
|
| 1498 |
|
|
{
|
| 1499 |
|
|
isymbuf = (Elf_Internal_Sym *) symtab_hdr->contents;
|
| 1500 |
|
|
if (isymbuf == NULL)
|
| 1501 |
|
|
isymbuf = bfd_elf_get_elf_syms (input_bfd, symtab_hdr,
|
| 1502 |
|
|
symtab_hdr->sh_info, 0,
|
| 1503 |
|
|
NULL, NULL, NULL);
|
| 1504 |
|
|
if (isymbuf == NULL)
|
| 1505 |
|
|
goto error_return;
|
| 1506 |
|
|
}
|
| 1507 |
|
|
|
| 1508 |
|
|
amt = symtab_hdr->sh_info;
|
| 1509 |
|
|
amt *= sizeof (asection *);
|
| 1510 |
|
|
sections = bfd_malloc (amt);
|
| 1511 |
|
|
if (sections == NULL && amt != 0)
|
| 1512 |
|
|
goto error_return;
|
| 1513 |
|
|
|
| 1514 |
|
|
isymend = isymbuf + symtab_hdr->sh_info;
|
| 1515 |
|
|
for (isym = isymbuf, secpp = sections; isym < isymend; ++isym, ++secpp)
|
| 1516 |
|
|
{
|
| 1517 |
|
|
asection *isec;
|
| 1518 |
|
|
|
| 1519 |
|
|
if (isym->st_shndx == SHN_UNDEF)
|
| 1520 |
|
|
isec = bfd_und_section_ptr;
|
| 1521 |
|
|
else if (isym->st_shndx == SHN_ABS)
|
| 1522 |
|
|
isec = bfd_abs_section_ptr;
|
| 1523 |
|
|
else if (isym->st_shndx == SHN_COMMON)
|
| 1524 |
|
|
isec = bfd_com_section_ptr;
|
| 1525 |
|
|
else
|
| 1526 |
|
|
isec = bfd_section_from_elf_index (input_bfd, isym->st_shndx);
|
| 1527 |
|
|
|
| 1528 |
|
|
*secpp = isec;
|
| 1529 |
|
|
}
|
| 1530 |
|
|
|
| 1531 |
|
|
if (! elf32_open8_relocate_section (output_bfd, link_info, input_bfd,
|
| 1532 |
|
|
input_section, data, internal_relocs,
|
| 1533 |
|
|
isymbuf, sections))
|
| 1534 |
|
|
goto error_return;
|
| 1535 |
|
|
|
| 1536 |
|
|
if (sections != NULL)
|
| 1537 |
|
|
free (sections);
|
| 1538 |
|
|
if (isymbuf != NULL
|
| 1539 |
|
|
&& symtab_hdr->contents != (unsigned char *) isymbuf)
|
| 1540 |
|
|
free (isymbuf);
|
| 1541 |
|
|
if (elf_section_data (input_section)->relocs != internal_relocs)
|
| 1542 |
|
|
free (internal_relocs);
|
| 1543 |
|
|
}
|
| 1544 |
|
|
|
| 1545 |
|
|
return data;
|
| 1546 |
|
|
|
| 1547 |
|
|
error_return:
|
| 1548 |
|
|
if (sections != NULL)
|
| 1549 |
|
|
free (sections);
|
| 1550 |
|
|
if (isymbuf != NULL
|
| 1551 |
|
|
&& symtab_hdr->contents != (unsigned char *) isymbuf)
|
| 1552 |
|
|
free (isymbuf);
|
| 1553 |
|
|
if (internal_relocs != NULL
|
| 1554 |
|
|
&& elf_section_data (input_section)->relocs != internal_relocs)
|
| 1555 |
|
|
free (internal_relocs);
|
| 1556 |
|
|
return NULL;
|
| 1557 |
|
|
}
|
| 1558 |
|
|
|
| 1559 |
|
|
|
| 1560 |
|
|
/* Determines the hash entry name for a particular reloc. It consists of
|
| 1561 |
|
|
the identifier of the symbol section and the added reloc addend and
|
| 1562 |
|
|
symbol offset relative to the section the symbol is attached to. */
|
| 1563 |
|
|
|
| 1564 |
|
|
static char *
|
| 1565 |
|
|
open8_stub_name (const asection *symbol_section,
|
| 1566 |
|
|
const bfd_vma symbol_offset,
|
| 1567 |
|
|
const Elf_Internal_Rela *rela)
|
| 1568 |
|
|
{
|
| 1569 |
|
|
char *stub_name;
|
| 1570 |
|
|
bfd_size_type len;
|
| 1571 |
|
|
|
| 1572 |
|
|
len = 8 + 1 + 8 + 1 + 1;
|
| 1573 |
|
|
stub_name = bfd_malloc (len);
|
| 1574 |
|
|
|
| 1575 |
|
|
snprintf (stub_name, len, "%08x+%08x",
|
| 1576 |
|
|
symbol_section->id & 0xffffffff,
|
| 1577 |
|
|
(unsigned int) ((rela->r_addend & 0xffffffff) + symbol_offset));
|
| 1578 |
|
|
|
| 1579 |
|
|
return stub_name;
|
| 1580 |
|
|
}
|
| 1581 |
|
|
|
| 1582 |
|
|
|
| 1583 |
|
|
/* Add a new stub entry to the stub hash. Not all fields of the new
|
| 1584 |
|
|
stub entry are initialised. */
|
| 1585 |
|
|
|
| 1586 |
|
|
static struct elf32_open8_stub_hash_entry *
|
| 1587 |
|
|
open8_add_stub (const char *stub_name,
|
| 1588 |
|
|
struct elf32_open8_link_hash_table *htab)
|
| 1589 |
|
|
{
|
| 1590 |
|
|
struct elf32_open8_stub_hash_entry *hsh;
|
| 1591 |
|
|
|
| 1592 |
|
|
/* Enter this entry into the linker stub hash table. */
|
| 1593 |
|
|
hsh = open8_stub_hash_lookup (&htab->bstab, stub_name, TRUE, FALSE);
|
| 1594 |
|
|
|
| 1595 |
|
|
if (hsh == NULL)
|
| 1596 |
|
|
{
|
| 1597 |
|
|
(*_bfd_error_handler) (_("%B: cannot create stub entry %s"),
|
| 1598 |
|
|
NULL, stub_name);
|
| 1599 |
|
|
return NULL;
|
| 1600 |
|
|
}
|
| 1601 |
|
|
|
| 1602 |
|
|
hsh->stub_offset = 0;
|
| 1603 |
|
|
return hsh;
|
| 1604 |
|
|
}
|
| 1605 |
|
|
|
| 1606 |
|
|
/* We assume that there is already space allocated for the stub section
|
| 1607 |
|
|
contents and that before building the stubs the section size is
|
| 1608 |
|
|
initialized to 0. We assume that within the stub hash table entry,
|
| 1609 |
|
|
the absolute position of the jmp target has been written in the
|
| 1610 |
|
|
target_value field. We write here the offset of the generated jmp insn
|
| 1611 |
|
|
relative to the trampoline section start to the stub_offset entry in
|
| 1612 |
|
|
the stub hash table entry. */
|
| 1613 |
|
|
|
| 1614 |
|
|
static bfd_boolean
|
| 1615 |
|
|
open8_build_one_stub (struct bfd_hash_entry *bh, void *in_arg)
|
| 1616 |
|
|
{
|
| 1617 |
|
|
struct elf32_open8_stub_hash_entry *hsh;
|
| 1618 |
|
|
struct bfd_link_info *info;
|
| 1619 |
|
|
struct elf32_open8_link_hash_table *htab;
|
| 1620 |
|
|
bfd *stub_bfd;
|
| 1621 |
|
|
bfd_byte *loc;
|
| 1622 |
|
|
bfd_vma target;
|
| 1623 |
|
|
bfd_vma starget;
|
| 1624 |
|
|
|
| 1625 |
|
|
/* Basic opcode. */
|
| 1626 |
|
|
bfd_vma jmp_insn = 0x0000940c;
|
| 1627 |
|
|
|
| 1628 |
|
|
/* Massage our args to the form they really have. */
|
| 1629 |
|
|
hsh = open8_stub_hash_entry (bh);
|
| 1630 |
|
|
|
| 1631 |
|
|
if (!hsh->is_actually_needed)
|
| 1632 |
|
|
return TRUE;
|
| 1633 |
|
|
|
| 1634 |
|
|
info = (struct bfd_link_info *) in_arg;
|
| 1635 |
|
|
|
| 1636 |
|
|
htab = open8_link_hash_table (info);
|
| 1637 |
|
|
if (htab == NULL)
|
| 1638 |
|
|
return FALSE;
|
| 1639 |
|
|
|
| 1640 |
|
|
target = hsh->target_value;
|
| 1641 |
|
|
|
| 1642 |
|
|
/* Make a note of the offset within the stubs for this entry. */
|
| 1643 |
|
|
hsh->stub_offset = htab->stub_sec->size;
|
| 1644 |
|
|
loc = htab->stub_sec->contents + hsh->stub_offset;
|
| 1645 |
|
|
|
| 1646 |
|
|
stub_bfd = htab->stub_sec->owner;
|
| 1647 |
|
|
|
| 1648 |
|
|
if (debug_stubs)
|
| 1649 |
|
|
printf ("Building one Stub. Address: 0x%x, Offset: 0x%x\n",
|
| 1650 |
|
|
(unsigned int) target,
|
| 1651 |
|
|
(unsigned int) hsh->stub_offset);
|
| 1652 |
|
|
|
| 1653 |
|
|
/* We now have to add the information on the jump target to the bare
|
| 1654 |
|
|
opcode bits already set in jmp_insn. */
|
| 1655 |
|
|
|
| 1656 |
|
|
/* Check for the alignment of the address. */
|
| 1657 |
|
|
if (target & 1)
|
| 1658 |
|
|
return FALSE;
|
| 1659 |
|
|
|
| 1660 |
|
|
starget = target >> 1;
|
| 1661 |
|
|
jmp_insn |= ((starget & 0x10000) | ((starget << 3) & 0x1f00000)) >> 16;
|
| 1662 |
|
|
bfd_put_16 (stub_bfd, jmp_insn, loc);
|
| 1663 |
|
|
bfd_put_16 (stub_bfd, (bfd_vma) starget & 0xffff, loc + 2);
|
| 1664 |
|
|
|
| 1665 |
|
|
htab->stub_sec->size += 4;
|
| 1666 |
|
|
|
| 1667 |
|
|
/* Now add the entries in the address mapping table if there is still
|
| 1668 |
|
|
space left. */
|
| 1669 |
|
|
{
|
| 1670 |
|
|
unsigned int nr;
|
| 1671 |
|
|
|
| 1672 |
|
|
nr = htab->amt_entry_cnt + 1;
|
| 1673 |
|
|
if (nr <= htab->amt_max_entry_cnt)
|
| 1674 |
|
|
{
|
| 1675 |
|
|
htab->amt_entry_cnt = nr;
|
| 1676 |
|
|
|
| 1677 |
|
|
htab->amt_stub_offsets[nr - 1] = hsh->stub_offset;
|
| 1678 |
|
|
htab->amt_destination_addr[nr - 1] = target;
|
| 1679 |
|
|
}
|
| 1680 |
|
|
}
|
| 1681 |
|
|
|
| 1682 |
|
|
return TRUE;
|
| 1683 |
|
|
}
|
| 1684 |
|
|
|
| 1685 |
|
|
static bfd_boolean
|
| 1686 |
|
|
open8_mark_stub_not_to_be_necessary (struct bfd_hash_entry *bh,
|
| 1687 |
|
|
void *in_arg ATTRIBUTE_UNUSED)
|
| 1688 |
|
|
{
|
| 1689 |
|
|
struct elf32_open8_stub_hash_entry *hsh;
|
| 1690 |
|
|
|
| 1691 |
|
|
hsh = open8_stub_hash_entry (bh);
|
| 1692 |
|
|
hsh->is_actually_needed = FALSE;
|
| 1693 |
|
|
|
| 1694 |
|
|
return TRUE;
|
| 1695 |
|
|
}
|
| 1696 |
|
|
|
| 1697 |
|
|
static bfd_boolean
|
| 1698 |
|
|
open8_size_one_stub (struct bfd_hash_entry *bh, void *in_arg)
|
| 1699 |
|
|
{
|
| 1700 |
|
|
struct elf32_open8_stub_hash_entry *hsh;
|
| 1701 |
|
|
struct elf32_open8_link_hash_table *htab;
|
| 1702 |
|
|
int size;
|
| 1703 |
|
|
|
| 1704 |
|
|
/* Massage our args to the form they really have. */
|
| 1705 |
|
|
hsh = open8_stub_hash_entry (bh);
|
| 1706 |
|
|
htab = in_arg;
|
| 1707 |
|
|
|
| 1708 |
|
|
if (hsh->is_actually_needed)
|
| 1709 |
|
|
size = 4;
|
| 1710 |
|
|
else
|
| 1711 |
|
|
size = 0;
|
| 1712 |
|
|
|
| 1713 |
|
|
htab->stub_sec->size += size;
|
| 1714 |
|
|
return TRUE;
|
| 1715 |
|
|
}
|
| 1716 |
|
|
|
| 1717 |
|
|
void
|
| 1718 |
|
|
elf32_open8_setup_params (struct bfd_link_info *info,
|
| 1719 |
|
|
bfd *open8_stub_bfd,
|
| 1720 |
|
|
asection *open8_stub_section,
|
| 1721 |
|
|
bfd_boolean no_stubs,
|
| 1722 |
|
|
bfd_boolean deb_stubs,
|
| 1723 |
|
|
bfd_boolean deb_relax,
|
| 1724 |
|
|
bfd_vma pc_wrap_around,
|
| 1725 |
|
|
bfd_boolean call_ret_replacement)
|
| 1726 |
|
|
{
|
| 1727 |
|
|
struct elf32_open8_link_hash_table *htab = open8_link_hash_table (info);
|
| 1728 |
|
|
|
| 1729 |
|
|
if (htab == NULL)
|
| 1730 |
|
|
return;
|
| 1731 |
|
|
htab->stub_sec = open8_stub_section;
|
| 1732 |
|
|
htab->stub_bfd = open8_stub_bfd;
|
| 1733 |
|
|
htab->no_stubs = no_stubs;
|
| 1734 |
|
|
|
| 1735 |
|
|
debug_relax = deb_relax;
|
| 1736 |
|
|
debug_stubs = deb_stubs;
|
| 1737 |
|
|
open8_pc_wrap_around = pc_wrap_around;
|
| 1738 |
|
|
open8_replace_call_ret_sequences = call_ret_replacement;
|
| 1739 |
|
|
}
|
| 1740 |
|
|
|
| 1741 |
|
|
|
| 1742 |
|
|
/* Set up various things so that we can make a list of input sections
|
| 1743 |
|
|
for each output section included in the link. Returns -1 on error,
|
| 1744 |
|
|
|
| 1745 |
|
|
information on the stubs bfd and the stub section in the info
|
| 1746 |
|
|
struct. */
|
| 1747 |
|
|
|
| 1748 |
|
|
int
|
| 1749 |
|
|
elf32_open8_setup_section_lists (bfd *output_bfd,
|
| 1750 |
|
|
struct bfd_link_info *info)
|
| 1751 |
|
|
{
|
| 1752 |
|
|
bfd *input_bfd;
|
| 1753 |
|
|
unsigned int bfd_count;
|
| 1754 |
|
|
int top_id, top_index;
|
| 1755 |
|
|
asection *section;
|
| 1756 |
|
|
asection **input_list, **list;
|
| 1757 |
|
|
bfd_size_type amt;
|
| 1758 |
|
|
struct elf32_open8_link_hash_table *htab = open8_link_hash_table (info);
|
| 1759 |
|
|
|
| 1760 |
|
|
if (htab == NULL || htab->no_stubs)
|
| 1761 |
|
|
return 0;
|
| 1762 |
|
|
|
| 1763 |
|
|
/* Count the number of input BFDs and find the top input section id. */
|
| 1764 |
|
|
for (input_bfd = info->input_bfds, bfd_count = 0, top_id = 0;
|
| 1765 |
|
|
input_bfd != NULL;
|
| 1766 |
|
|
input_bfd = input_bfd->link_next)
|
| 1767 |
|
|
{
|
| 1768 |
|
|
bfd_count += 1;
|
| 1769 |
|
|
for (section = input_bfd->sections;
|
| 1770 |
|
|
section != NULL;
|
| 1771 |
|
|
section = section->next)
|
| 1772 |
|
|
if (top_id < section->id)
|
| 1773 |
|
|
top_id = section->id;
|
| 1774 |
|
|
}
|
| 1775 |
|
|
|
| 1776 |
|
|
htab->bfd_count = bfd_count;
|
| 1777 |
|
|
|
| 1778 |
|
|
/* We can't use output_bfd->section_count here to find the top output
|
| 1779 |
|
|
section index as some sections may have been removed, and
|
| 1780 |
|
|
strip_excluded_output_sections doesn't renumber the indices. */
|
| 1781 |
|
|
for (section = output_bfd->sections, top_index = 0;
|
| 1782 |
|
|
section != NULL;
|
| 1783 |
|
|
section = section->next)
|
| 1784 |
|
|
if (top_index < section->index)
|
| 1785 |
|
|
top_index = section->index;
|
| 1786 |
|
|
|
| 1787 |
|
|
htab->top_index = top_index;
|
| 1788 |
|
|
amt = sizeof (asection *) * (top_index + 1);
|
| 1789 |
|
|
input_list = bfd_malloc (amt);
|
| 1790 |
|
|
htab->input_list = input_list;
|
| 1791 |
|
|
if (input_list == NULL)
|
| 1792 |
|
|
return -1;
|
| 1793 |
|
|
|
| 1794 |
|
|
/* For sections we aren't interested in, mark their entries with a
|
| 1795 |
|
|
value we can check later. */
|
| 1796 |
|
|
list = input_list + top_index;
|
| 1797 |
|
|
do
|
| 1798 |
|
|
*list = bfd_abs_section_ptr;
|
| 1799 |
|
|
while (list-- != input_list);
|
| 1800 |
|
|
|
| 1801 |
|
|
for (section = output_bfd->sections;
|
| 1802 |
|
|
section != NULL;
|
| 1803 |
|
|
section = section->next)
|
| 1804 |
|
|
if ((section->flags & SEC_CODE) != 0)
|
| 1805 |
|
|
input_list[section->index] = NULL;
|
| 1806 |
|
|
|
| 1807 |
|
|
return 1;
|
| 1808 |
|
|
}
|
| 1809 |
|
|
|
| 1810 |
|
|
|
| 1811 |
|
|
/* Read in all local syms for all input bfds, and create hash entries
|
| 1812 |
|
|
for export stubs if we are building a multi-subspace shared lib.
|
| 1813 |
|
|
Returns -1 on error, 0 otherwise. */
|
| 1814 |
|
|
|
| 1815 |
|
|
static int
|
| 1816 |
|
|
get_local_syms (bfd *input_bfd, struct bfd_link_info *info)
|
| 1817 |
|
|
{
|
| 1818 |
|
|
unsigned int bfd_indx;
|
| 1819 |
|
|
Elf_Internal_Sym *local_syms, **all_local_syms;
|
| 1820 |
|
|
struct elf32_open8_link_hash_table *htab = open8_link_hash_table (info);
|
| 1821 |
|
|
bfd_size_type amt;
|
| 1822 |
|
|
|
| 1823 |
|
|
if (htab == NULL)
|
| 1824 |
|
|
return -1;
|
| 1825 |
|
|
|
| 1826 |
|
|
/* We want to read in symbol extension records only once. To do this
|
| 1827 |
|
|
we need to read in the local symbols in parallel and save them for
|
| 1828 |
|
|
later use; so hold pointers to the local symbols in an array. */
|
| 1829 |
|
|
amt = sizeof (Elf_Internal_Sym *) * htab->bfd_count;
|
| 1830 |
|
|
all_local_syms = bfd_zmalloc (amt);
|
| 1831 |
|
|
htab->all_local_syms = all_local_syms;
|
| 1832 |
|
|
if (all_local_syms == NULL)
|
| 1833 |
|
|
return -1;
|
| 1834 |
|
|
|
| 1835 |
|
|
/* Walk over all the input BFDs, swapping in local symbols.
|
| 1836 |
|
|
If we are creating a shared library, create hash entries for the
|
| 1837 |
|
|
export stubs. */
|
| 1838 |
|
|
for (bfd_indx = 0;
|
| 1839 |
|
|
input_bfd != NULL;
|
| 1840 |
|
|
input_bfd = input_bfd->link_next, bfd_indx++)
|
| 1841 |
|
|
{
|
| 1842 |
|
|
Elf_Internal_Shdr *symtab_hdr;
|
| 1843 |
|
|
|
| 1844 |
|
|
/* We'll need the symbol table in a second. */
|
| 1845 |
|
|
symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr;
|
| 1846 |
|
|
if (symtab_hdr->sh_info == 0)
|
| 1847 |
|
|
continue;
|
| 1848 |
|
|
|
| 1849 |
|
|
/* We need an array of the local symbols attached to the input bfd. */
|
| 1850 |
|
|
local_syms = (Elf_Internal_Sym *) symtab_hdr->contents;
|
| 1851 |
|
|
if (local_syms == NULL)
|
| 1852 |
|
|
{
|
| 1853 |
|
|
local_syms = bfd_elf_get_elf_syms (input_bfd, symtab_hdr,
|
| 1854 |
|
|
symtab_hdr->sh_info, 0,
|
| 1855 |
|
|
NULL, NULL, NULL);
|
| 1856 |
|
|
/* Cache them for elf_link_input_bfd. */
|
| 1857 |
|
|
symtab_hdr->contents = (unsigned char *) local_syms;
|
| 1858 |
|
|
}
|
| 1859 |
|
|
if (local_syms == NULL)
|
| 1860 |
|
|
return -1;
|
| 1861 |
|
|
|
| 1862 |
|
|
all_local_syms[bfd_indx] = local_syms;
|
| 1863 |
|
|
}
|
| 1864 |
|
|
|
| 1865 |
|
|
return 0;
|
| 1866 |
|
|
}
|
| 1867 |
|
|
|
| 1868 |
|
|
#define ADD_DUMMY_STUBS_FOR_DEBUGGING 0
|
| 1869 |
|
|
|
| 1870 |
|
|
bfd_boolean
|
| 1871 |
|
|
elf32_open8_size_stubs (bfd *output_bfd,
|
| 1872 |
|
|
struct bfd_link_info *info,
|
| 1873 |
|
|
bfd_boolean is_prealloc_run)
|
| 1874 |
|
|
{
|
| 1875 |
|
|
struct elf32_open8_link_hash_table *htab;
|
| 1876 |
|
|
int stub_changed = 0;
|
| 1877 |
|
|
|
| 1878 |
|
|
htab = open8_link_hash_table (info);
|
| 1879 |
|
|
if (htab == NULL)
|
| 1880 |
|
|
return FALSE;
|
| 1881 |
|
|
|
| 1882 |
|
|
/* At this point we initialize htab->vector_base
|
| 1883 |
|
|
To the start of the text output section. */
|
| 1884 |
|
|
htab->vector_base = htab->stub_sec->output_section->vma;
|
| 1885 |
|
|
|
| 1886 |
|
|
if (get_local_syms (info->input_bfds, info))
|
| 1887 |
|
|
{
|
| 1888 |
|
|
if (htab->all_local_syms)
|
| 1889 |
|
|
goto error_ret_free_local;
|
| 1890 |
|
|
return FALSE;
|
| 1891 |
|
|
}
|
| 1892 |
|
|
|
| 1893 |
|
|
if (ADD_DUMMY_STUBS_FOR_DEBUGGING)
|
| 1894 |
|
|
{
|
| 1895 |
|
|
struct elf32_open8_stub_hash_entry *test;
|
| 1896 |
|
|
|
| 1897 |
|
|
test = open8_add_stub ("Hugo",htab);
|
| 1898 |
|
|
test->target_value = 0x123456;
|
| 1899 |
|
|
test->stub_offset = 13;
|
| 1900 |
|
|
|
| 1901 |
|
|
test = open8_add_stub ("Hugo2",htab);
|
| 1902 |
|
|
test->target_value = 0x84210;
|
| 1903 |
|
|
test->stub_offset = 14;
|
| 1904 |
|
|
}
|
| 1905 |
|
|
|
| 1906 |
|
|
while (1)
|
| 1907 |
|
|
{
|
| 1908 |
|
|
bfd *input_bfd;
|
| 1909 |
|
|
unsigned int bfd_indx;
|
| 1910 |
|
|
|
| 1911 |
|
|
/* We will have to re-generate the stub hash table each time anything
|
| 1912 |
|
|
in memory has changed. */
|
| 1913 |
|
|
|
| 1914 |
|
|
bfd_hash_traverse (&htab->bstab,
|
| 1915 |
|
|
open8_mark_stub_not_to_be_necessary,
|
| 1916 |
|
|
htab);
|
| 1917 |
|
|
for (input_bfd = info->input_bfds, bfd_indx = 0;
|
| 1918 |
|
|
input_bfd != NULL;
|
| 1919 |
|
|
input_bfd = input_bfd->link_next, bfd_indx++)
|
| 1920 |
|
|
{
|
| 1921 |
|
|
Elf_Internal_Shdr *symtab_hdr;
|
| 1922 |
|
|
asection *section;
|
| 1923 |
|
|
Elf_Internal_Sym *local_syms;
|
| 1924 |
|
|
|
| 1925 |
|
|
/* We'll need the symbol table in a second. */
|
| 1926 |
|
|
symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr;
|
| 1927 |
|
|
if (symtab_hdr->sh_info == 0)
|
| 1928 |
|
|
continue;
|
| 1929 |
|
|
|
| 1930 |
|
|
local_syms = htab->all_local_syms[bfd_indx];
|
| 1931 |
|
|
|
| 1932 |
|
|
/* Walk over each section attached to the input bfd. */
|
| 1933 |
|
|
for (section = input_bfd->sections;
|
| 1934 |
|
|
section != NULL;
|
| 1935 |
|
|
section = section->next)
|
| 1936 |
|
|
{
|
| 1937 |
|
|
Elf_Internal_Rela *internal_relocs, *irelaend, *irela;
|
| 1938 |
|
|
|
| 1939 |
|
|
/* If there aren't any relocs, then there's nothing more
|
| 1940 |
|
|
to do. */
|
| 1941 |
|
|
if ((section->flags & SEC_RELOC) == 0
|
| 1942 |
|
|
|| section->reloc_count == 0)
|
| 1943 |
|
|
continue;
|
| 1944 |
|
|
|
| 1945 |
|
|
/* If this section is a link-once section that will be
|
| 1946 |
|
|
discarded, then don't create any stubs. */
|
| 1947 |
|
|
if (section->output_section == NULL
|
| 1948 |
|
|
|| section->output_section->owner != output_bfd)
|
| 1949 |
|
|
continue;
|
| 1950 |
|
|
|
| 1951 |
|
|
/* Get the relocs. */
|
| 1952 |
|
|
internal_relocs = _bfd_elf_link_read_relocs (input_bfd,
|
| 1953 |
|
|
section,
|
| 1954 |
|
|
NULL,
|
| 1955 |
|
|
NULL,
|
| 1956 |
|
|
info->keep_memory);
|
| 1957 |
|
|
if (internal_relocs == NULL)
|
| 1958 |
|
|
goto error_ret_free_local;
|
| 1959 |
|
|
|
| 1960 |
|
|
/* Now examine each relocation. */
|
| 1961 |
|
|
irela = internal_relocs;
|
| 1962 |
|
|
irelaend = irela + section->reloc_count;
|
| 1963 |
|
|
for (; irela < irelaend; irela++)
|
| 1964 |
|
|
{
|
| 1965 |
|
|
unsigned int r_type, r_indx;
|
| 1966 |
|
|
struct elf32_open8_stub_hash_entry *hsh;
|
| 1967 |
|
|
asection *sym_sec;
|
| 1968 |
|
|
bfd_vma sym_value;
|
| 1969 |
|
|
bfd_vma destination;
|
| 1970 |
|
|
struct elf_link_hash_entry *hh;
|
| 1971 |
|
|
char *stub_name;
|
| 1972 |
|
|
|
| 1973 |
|
|
r_type = ELF32_R_TYPE (irela->r_info);
|
| 1974 |
|
|
r_indx = ELF32_R_SYM (irela->r_info);
|
| 1975 |
|
|
|
| 1976 |
|
|
/* Now determine the call target, its name, value,
|
| 1977 |
|
|
section. */
|
| 1978 |
|
|
sym_sec = NULL;
|
| 1979 |
|
|
sym_value = 0;
|
| 1980 |
|
|
destination = 0;
|
| 1981 |
|
|
hh = NULL;
|
| 1982 |
|
|
if (r_indx < symtab_hdr->sh_info)
|
| 1983 |
|
|
{
|
| 1984 |
|
|
/* It's a local symbol. */
|
| 1985 |
|
|
Elf_Internal_Sym *sym;
|
| 1986 |
|
|
Elf_Internal_Shdr *hdr;
|
| 1987 |
|
|
unsigned int shndx;
|
| 1988 |
|
|
|
| 1989 |
|
|
sym = local_syms + r_indx;
|
| 1990 |
|
|
if (ELF_ST_TYPE (sym->st_info) != STT_SECTION)
|
| 1991 |
|
|
sym_value = sym->st_value;
|
| 1992 |
|
|
shndx = sym->st_shndx;
|
| 1993 |
|
|
if (shndx < elf_numsections (input_bfd))
|
| 1994 |
|
|
{
|
| 1995 |
|
|
hdr = elf_elfsections (input_bfd)[shndx];
|
| 1996 |
|
|
sym_sec = hdr->bfd_section;
|
| 1997 |
|
|
destination = (sym_value + irela->r_addend
|
| 1998 |
|
|
+ sym_sec->output_offset
|
| 1999 |
|
|
+ sym_sec->output_section->vma);
|
| 2000 |
|
|
}
|
| 2001 |
|
|
}
|
| 2002 |
|
|
else
|
| 2003 |
|
|
{
|
| 2004 |
|
|
/* It's an external symbol. */
|
| 2005 |
|
|
int e_indx;
|
| 2006 |
|
|
|
| 2007 |
|
|
e_indx = r_indx - symtab_hdr->sh_info;
|
| 2008 |
|
|
hh = elf_sym_hashes (input_bfd)[e_indx];
|
| 2009 |
|
|
|
| 2010 |
|
|
while (hh->root.type == bfd_link_hash_indirect
|
| 2011 |
|
|
|| hh->root.type == bfd_link_hash_warning)
|
| 2012 |
|
|
hh = (struct elf_link_hash_entry *)
|
| 2013 |
|
|
(hh->root.u.i.link);
|
| 2014 |
|
|
|
| 2015 |
|
|
if (hh->root.type == bfd_link_hash_defined
|
| 2016 |
|
|
|| hh->root.type == bfd_link_hash_defweak)
|
| 2017 |
|
|
{
|
| 2018 |
|
|
sym_sec = hh->root.u.def.section;
|
| 2019 |
|
|
sym_value = hh->root.u.def.value;
|
| 2020 |
|
|
if (sym_sec->output_section != NULL)
|
| 2021 |
|
|
destination = (sym_value + irela->r_addend
|
| 2022 |
|
|
+ sym_sec->output_offset
|
| 2023 |
|
|
+ sym_sec->output_section->vma);
|
| 2024 |
|
|
}
|
| 2025 |
|
|
else if (hh->root.type == bfd_link_hash_undefweak)
|
| 2026 |
|
|
{
|
| 2027 |
|
|
if (! info->shared)
|
| 2028 |
|
|
continue;
|
| 2029 |
|
|
}
|
| 2030 |
|
|
else if (hh->root.type == bfd_link_hash_undefined)
|
| 2031 |
|
|
{
|
| 2032 |
|
|
if (! (info->unresolved_syms_in_objects == RM_IGNORE
|
| 2033 |
|
|
&& (ELF_ST_VISIBILITY (hh->other)
|
| 2034 |
|
|
== STV_DEFAULT)))
|
| 2035 |
|
|
continue;
|
| 2036 |
|
|
}
|
| 2037 |
|
|
else
|
| 2038 |
|
|
{
|
| 2039 |
|
|
bfd_set_error (bfd_error_bad_value);
|
| 2040 |
|
|
|
| 2041 |
|
|
error_ret_free_internal:
|
| 2042 |
|
|
if (elf_section_data (section)->relocs == NULL)
|
| 2043 |
|
|
free (internal_relocs);
|
| 2044 |
|
|
goto error_ret_free_local;
|
| 2045 |
|
|
}
|
| 2046 |
|
|
}
|
| 2047 |
|
|
|
| 2048 |
|
|
if (! open8_stub_is_required_for_16_bit_reloc
|
| 2049 |
|
|
(destination - htab->vector_base))
|
| 2050 |
|
|
{
|
| 2051 |
|
|
if (!is_prealloc_run)
|
| 2052 |
|
|
/* We are having a reloc that does't need a stub. */
|
| 2053 |
|
|
continue;
|
| 2054 |
|
|
|
| 2055 |
|
|
/* We don't right now know if a stub will be needed.
|
| 2056 |
|
|
Let's rather be on the safe side. */
|
| 2057 |
|
|
}
|
| 2058 |
|
|
|
| 2059 |
|
|
/* Get the name of this stub. */
|
| 2060 |
|
|
stub_name = open8_stub_name (sym_sec, sym_value, irela);
|
| 2061 |
|
|
|
| 2062 |
|
|
if (!stub_name)
|
| 2063 |
|
|
goto error_ret_free_internal;
|
| 2064 |
|
|
|
| 2065 |
|
|
|
| 2066 |
|
|
hsh = open8_stub_hash_lookup (&htab->bstab,
|
| 2067 |
|
|
stub_name,
|
| 2068 |
|
|
FALSE, FALSE);
|
| 2069 |
|
|
if (hsh != NULL)
|
| 2070 |
|
|
{
|
| 2071 |
|
|
/* The proper stub has already been created. Mark it
|
| 2072 |
|
|
to be used and write the possibly changed destination
|
| 2073 |
|
|
value. */
|
| 2074 |
|
|
hsh->is_actually_needed = TRUE;
|
| 2075 |
|
|
hsh->target_value = destination;
|
| 2076 |
|
|
free (stub_name);
|
| 2077 |
|
|
continue;
|
| 2078 |
|
|
}
|
| 2079 |
|
|
|
| 2080 |
|
|
hsh = open8_add_stub (stub_name, htab);
|
| 2081 |
|
|
if (hsh == NULL)
|
| 2082 |
|
|
{
|
| 2083 |
|
|
free (stub_name);
|
| 2084 |
|
|
goto error_ret_free_internal;
|
| 2085 |
|
|
}
|
| 2086 |
|
|
|
| 2087 |
|
|
hsh->is_actually_needed = TRUE;
|
| 2088 |
|
|
hsh->target_value = destination;
|
| 2089 |
|
|
|
| 2090 |
|
|
if (debug_stubs)
|
| 2091 |
|
|
printf ("Adding stub with destination 0x%x to the"
|
| 2092 |
|
|
" hash table.\n", (unsigned int) destination);
|
| 2093 |
|
|
if (debug_stubs)
|
| 2094 |
|
|
printf ("(Pre-Alloc run: %i)\n", is_prealloc_run);
|
| 2095 |
|
|
|
| 2096 |
|
|
stub_changed = TRUE;
|
| 2097 |
|
|
}
|
| 2098 |
|
|
|
| 2099 |
|
|
/* We're done with the internal relocs, free them. */
|
| 2100 |
|
|
if (elf_section_data (section)->relocs == NULL)
|
| 2101 |
|
|
free (internal_relocs);
|
| 2102 |
|
|
}
|
| 2103 |
|
|
}
|
| 2104 |
|
|
|
| 2105 |
|
|
/* Re-Calculate the number of needed stubs. */
|
| 2106 |
|
|
htab->stub_sec->size = 0;
|
| 2107 |
|
|
bfd_hash_traverse (&htab->bstab, open8_size_one_stub, htab);
|
| 2108 |
|
|
|
| 2109 |
|
|
if (!stub_changed)
|
| 2110 |
|
|
break;
|
| 2111 |
|
|
|
| 2112 |
|
|
stub_changed = FALSE;
|
| 2113 |
|
|
}
|
| 2114 |
|
|
|
| 2115 |
|
|
free (htab->all_local_syms);
|
| 2116 |
|
|
return TRUE;
|
| 2117 |
|
|
|
| 2118 |
|
|
error_ret_free_local:
|
| 2119 |
|
|
free (htab->all_local_syms);
|
| 2120 |
|
|
return FALSE;
|
| 2121 |
|
|
}
|
| 2122 |
|
|
|
| 2123 |
|
|
|
| 2124 |
|
|
/* Build all the stubs associated with the current output file. The
|
| 2125 |
|
|
stubs are kept in a hash table attached to the main linker hash
|
| 2126 |
|
|
table. We also set up the `.plt' entries for statically linked PIC
|
| 2127 |
|
|
functions here. This function is called via hppaelf_finish in the
|
| 2128 |
|
|
linker. */
|
| 2129 |
|
|
|
| 2130 |
|
|
bfd_boolean
|
| 2131 |
|
|
elf32_open8_build_stubs (struct bfd_link_info *info)
|
| 2132 |
|
|
{
|
| 2133 |
|
|
asection *stub_sec;
|
| 2134 |
|
|
struct bfd_hash_table *table;
|
| 2135 |
|
|
struct elf32_open8_link_hash_table *htab;
|
| 2136 |
|
|
bfd_size_type total_size = 0;
|
| 2137 |
|
|
|
| 2138 |
|
|
htab = open8_link_hash_table (info);
|
| 2139 |
|
|
if (htab == NULL)
|
| 2140 |
|
|
return FALSE;
|
| 2141 |
|
|
|
| 2142 |
|
|
/* In case that there were several stub sections: */
|
| 2143 |
|
|
for (stub_sec = htab->stub_bfd->sections;
|
| 2144 |
|
|
stub_sec != NULL;
|
| 2145 |
|
|
stub_sec = stub_sec->next)
|
| 2146 |
|
|
{
|
| 2147 |
|
|
bfd_size_type size;
|
| 2148 |
|
|
|
| 2149 |
|
|
/* Allocate memory to hold the linker stubs. */
|
| 2150 |
|
|
size = stub_sec->size;
|
| 2151 |
|
|
total_size += size;
|
| 2152 |
|
|
|
| 2153 |
|
|
stub_sec->contents = bfd_zalloc (htab->stub_bfd, size);
|
| 2154 |
|
|
if (stub_sec->contents == NULL && size != 0)
|
| 2155 |
|
|
return FALSE;
|
| 2156 |
|
|
stub_sec->size = 0;
|
| 2157 |
|
|
}
|
| 2158 |
|
|
|
| 2159 |
|
|
/* Allocate memory for the address mapping table. */
|
| 2160 |
|
|
htab->amt_entry_cnt = 0;
|
| 2161 |
|
|
htab->amt_max_entry_cnt = total_size / 4;
|
| 2162 |
|
|
htab->amt_stub_offsets = bfd_malloc (sizeof (bfd_vma)
|
| 2163 |
|
|
* htab->amt_max_entry_cnt);
|
| 2164 |
|
|
htab->amt_destination_addr = bfd_malloc (sizeof (bfd_vma)
|
| 2165 |
|
|
* htab->amt_max_entry_cnt);
|
| 2166 |
|
|
|
| 2167 |
|
|
if (debug_stubs)
|
| 2168 |
|
|
printf ("Allocating %i entries in the AMT\n", htab->amt_max_entry_cnt);
|
| 2169 |
|
|
|
| 2170 |
|
|
/* Build the stubs as directed by the stub hash table. */
|
| 2171 |
|
|
table = &htab->bstab;
|
| 2172 |
|
|
bfd_hash_traverse (table, open8_build_one_stub, info);
|
| 2173 |
|
|
|
| 2174 |
|
|
if (debug_stubs)
|
| 2175 |
|
|
printf ("Final Stub section Size: %i\n", (int) htab->stub_sec->size);
|
| 2176 |
|
|
|
| 2177 |
|
|
return TRUE;
|
| 2178 |
|
|
}
|
| 2179 |
|
|
|
| 2180 |
|
|
#define ELF_ARCH bfd_arch_open8
|
| 2181 |
|
|
#define ELF_TARGET_ID OPEN8_ELF_DATA
|
| 2182 |
|
|
#define ELF_MACHINE_CODE EM_OPEN8
|
| 2183 |
|
|
#define ELF_MAXPAGESIZE 1
|
| 2184 |
|
|
|
| 2185 |
|
|
#define TARGET_LITTLE_SYM bfd_elf32_open8_vec
|
| 2186 |
|
|
#define TARGET_LITTLE_NAME "elf32-open8"
|
| 2187 |
|
|
|
| 2188 |
|
|
#define bfd_elf32_bfd_link_hash_table_create elf32_open8_link_hash_table_create
|
| 2189 |
|
|
#define bfd_elf32_bfd_link_hash_table_free elf32_open8_link_hash_table_free
|
| 2190 |
|
|
|
| 2191 |
|
|
#define elf_info_to_howto open8_info_to_howto_rela
|
| 2192 |
|
|
#define elf_info_to_howto_rel NULL
|
| 2193 |
|
|
#define elf_backend_relocate_section elf32_open8_relocate_section
|
| 2194 |
|
|
#define elf_backend_can_gc_sections 1
|
| 2195 |
|
|
#define elf_backend_rela_normal 1
|
| 2196 |
|
|
#define elf_backend_final_write_processing \
|
| 2197 |
|
|
bfd_elf_open8_final_write_processing
|
| 2198 |
|
|
#define elf_backend_object_p elf32_open8_object_p
|
| 2199 |
|
|
|
| 2200 |
|
|
#define bfd_elf32_bfd_relax_section elf32_open8_relax_section
|
| 2201 |
|
|
#define bfd_elf32_bfd_get_relocated_section_contents \
|
| 2202 |
|
|
elf32_open8_get_relocated_section_contents
|
| 2203 |
|
|
|
| 2204 |
|
|
#include "elf32-target.h"
|
