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c94cb02662
This changes the HOWTO macro to encode the howto.size field from a value given in bytes. This of course requires editing all target uses of HOWTO, a major pain, but makes it a little nicer to specify new target HOWTOs. Object files before/after this patch are unchanged in .data and .rodata. bfd/ * reloc.c (HOWTO_RSIZE): Encode size in bytes. (EMPTY_HOWTO): Adjust to keep it all zero. * aout-ns32k.c, * aoutx.h, * coff-alpha.c, * coff-arm.c, * coff-i386.c, * coff-mcore.c, * coff-mips.c, * coff-rs6000.c, * coff-sh.c, * coff-tic30.c, * coff-tic4x.c, * coff-tic54x.c, * coff-x86_64.c, * coff-z80.c, * coff-z8k.c, * coff64-rs6000.c, * elf-hppa.h, * elf-m10200.c, * elf-m10300.c, * elf32-arc.c, * elf32-arm.c, * elf32-avr.c, * elf32-bfin.c, * elf32-cr16.c, * elf32-cris.c, * elf32-crx.c, * elf32-csky.c, * elf32-d10v.c, * elf32-d30v.c, * elf32-dlx.c, * elf32-epiphany.c, * elf32-fr30.c, * elf32-frv.c, * elf32-ft32.c, * elf32-gen.c, * elf32-h8300.c, * elf32-i386.c, * elf32-ip2k.c, * elf32-iq2000.c, * elf32-lm32.c, * elf32-m32c.c, * elf32-m32r.c, * elf32-m68hc11.c, * elf32-m68hc12.c, * elf32-m68k.c, * elf32-mcore.c, * elf32-mep.c, * elf32-metag.c, * elf32-microblaze.c, * elf32-mips.c, * elf32-moxie.c, * elf32-msp430.c, * elf32-mt.c, * elf32-nds32.c, * elf32-nios2.c, * elf32-or1k.c, * elf32-pj.c, * elf32-ppc.c, * elf32-pru.c, * elf32-rl78.c, * elf32-rx.c, * elf32-s12z.c, * elf32-s390.c, * elf32-score.c, * elf32-score7.c, * elf32-sh-relocs.h, * elf32-spu.c, * elf32-tic6x.c, * elf32-tilepro.c, * elf32-v850.c, * elf32-vax.c, * elf32-visium.c, * elf32-wasm32.c, * elf32-xc16x.c, * elf32-xgate.c, * elf32-xstormy16.c, * elf32-xtensa.c, * elf32-z80.c, * elf64-alpha.c, * elf64-bpf.c, * elf64-gen.c, * elf64-mips.c, * elf64-mmix.c, * elf64-nfp.c, * elf64-ppc.c, * elf64-s390.c, * elf64-x86-64.c, * elfn32-mips.c, * elfnn-aarch64.c, * elfxx-ia64.c, * elfxx-loongarch.c, * elfxx-mips.c, * elfxx-riscv.c, * elfxx-sparc.c, * elfxx-tilegx.c, * mach-o-aarch64.c, * mach-o-arm.c, * mach-o-i386.c, * mach-o-x86-64.c, * pdp11.c, * reloc.c, * som.c, * vms-alpha.c: Adjust all uses of HOWTO. * bfd-in2.h: Regenerate. include/ * elf/arc-reloc.def: Adjust all uses of HOWTO.
1324 lines
37 KiB
C
1324 lines
37 KiB
C
/* Motorola 68HC11-specific support for 32-bit ELF
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Copyright (C) 1999-2022 Free Software Foundation, Inc.
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Contributed by Stephane Carrez (stcarrez@nerim.fr)
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(Heavily copied from the D10V port by Martin Hunt (hunt@cygnus.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, Boston,
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MA 02110-1301, USA. */
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#include "sysdep.h"
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#include "bfd.h"
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#include "bfdlink.h"
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#include "libbfd.h"
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#include "elf-bfd.h"
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#include "elf32-m68hc1x.h"
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#include "elf/m68hc11.h"
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#include "opcode/m68hc11.h"
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/* Relocation functions. */
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static reloc_howto_type *bfd_elf32_bfd_reloc_type_lookup
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(bfd *, bfd_reloc_code_real_type);
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static bool m68hc11_info_to_howto_rel
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(bfd *, arelent *, Elf_Internal_Rela *);
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/* Trampoline generation. */
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static bool m68hc11_elf_size_one_stub
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(struct bfd_hash_entry *gen_entry, void *in_arg);
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static bool m68hc11_elf_build_one_stub
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(struct bfd_hash_entry *gen_entry, void *in_arg);
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static struct bfd_link_hash_table* m68hc11_elf_bfd_link_hash_table_create
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(bfd* abfd);
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/* Linker relaxation. */
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static bool m68hc11_elf_relax_section
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(bfd *, asection *, struct bfd_link_info *, bool *);
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static void m68hc11_elf_relax_delete_bytes
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(bfd *, asection *, bfd_vma, int);
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static void m68hc11_relax_group
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(bfd *, asection *, bfd_byte *, unsigned, unsigned long, unsigned long);
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static int compare_reloc (const void *, const void *);
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/* Use REL instead of RELA to save space */
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#define USE_REL 1
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/* The Motorola 68HC11 microcontroller only addresses 64Kb but we also
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support a memory bank switching mechanism similar to 68HC12.
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We must handle 8 and 16-bit relocations. The 32-bit relocation
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are used for debugging sections (DWARF2) to represent a virtual
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address.
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The 3-bit and 16-bit PC rel relocation is only used by 68HC12. */
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static reloc_howto_type elf_m68hc11_howto_table[] = {
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/* This reloc does nothing. */
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HOWTO (R_M68HC11_NONE, /* type */
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0, /* rightshift */
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0, /* size */
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0, /* bitsize */
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false, /* pc_relative */
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0, /* bitpos */
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complain_overflow_dont,/* complain_on_overflow */
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bfd_elf_generic_reloc, /* special_function */
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"R_M68HC11_NONE", /* name */
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false, /* partial_inplace */
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0, /* src_mask */
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0, /* dst_mask */
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false), /* pcrel_offset */
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/* A 8 bit absolute relocation */
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HOWTO (R_M68HC11_8, /* type */
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0, /* rightshift */
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1, /* size */
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8, /* bitsize */
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false, /* pc_relative */
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0, /* bitpos */
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complain_overflow_bitfield, /* complain_on_overflow */
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bfd_elf_generic_reloc, /* special_function */
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"R_M68HC11_8", /* name */
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false, /* partial_inplace */
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0x00ff, /* src_mask */
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0x00ff, /* dst_mask */
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false), /* pcrel_offset */
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/* A 8 bit absolute relocation (upper address) */
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HOWTO (R_M68HC11_HI8, /* type */
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8, /* rightshift */
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1, /* size */
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8, /* bitsize */
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false, /* pc_relative */
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0, /* bitpos */
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complain_overflow_bitfield, /* complain_on_overflow */
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bfd_elf_generic_reloc, /* special_function */
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"R_M68HC11_HI8", /* name */
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false, /* partial_inplace */
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0x00ff, /* src_mask */
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0x00ff, /* dst_mask */
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false), /* pcrel_offset */
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/* A 8 bit absolute relocation (upper address) */
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HOWTO (R_M68HC11_LO8, /* type */
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0, /* rightshift */
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1, /* size */
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8, /* bitsize */
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false, /* pc_relative */
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0, /* bitpos */
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complain_overflow_dont, /* complain_on_overflow */
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bfd_elf_generic_reloc, /* special_function */
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"R_M68HC11_LO8", /* name */
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false, /* partial_inplace */
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0x00ff, /* src_mask */
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0x00ff, /* dst_mask */
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false), /* pcrel_offset */
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/* A 8 bit PC-rel relocation */
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HOWTO (R_M68HC11_PCREL_8, /* type */
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0, /* rightshift */
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1, /* size */
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8, /* bitsize */
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true, /* pc_relative */
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0, /* bitpos */
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complain_overflow_bitfield, /* complain_on_overflow */
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bfd_elf_generic_reloc, /* special_function */
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"R_M68HC11_PCREL_8", /* name */
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false, /* partial_inplace */
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0x00ff, /* src_mask */
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0x00ff, /* dst_mask */
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true), /* pcrel_offset */
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/* A 16 bit absolute relocation */
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HOWTO (R_M68HC11_16, /* type */
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0, /* rightshift */
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2, /* size */
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16, /* bitsize */
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false, /* pc_relative */
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0, /* bitpos */
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complain_overflow_dont /*bitfield */ , /* complain_on_overflow */
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bfd_elf_generic_reloc, /* special_function */
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"R_M68HC11_16", /* name */
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false, /* partial_inplace */
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0xffff, /* src_mask */
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0xffff, /* dst_mask */
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false), /* pcrel_offset */
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/* A 32 bit absolute relocation. This one is never used for the
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code relocation. It's used by gas for -gstabs generation. */
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HOWTO (R_M68HC11_32, /* type */
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0, /* rightshift */
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4, /* size */
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32, /* bitsize */
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false, /* pc_relative */
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0, /* bitpos */
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complain_overflow_bitfield, /* complain_on_overflow */
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bfd_elf_generic_reloc, /* special_function */
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"R_M68HC11_32", /* name */
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false, /* partial_inplace */
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0xffffffff, /* src_mask */
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0xffffffff, /* dst_mask */
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false), /* pcrel_offset */
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/* A 3 bit absolute relocation */
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HOWTO (R_M68HC11_3B, /* type */
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0, /* rightshift */
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1, /* size */
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3, /* bitsize */
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false, /* pc_relative */
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0, /* bitpos */
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complain_overflow_bitfield, /* complain_on_overflow */
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bfd_elf_generic_reloc, /* special_function */
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"R_M68HC11_4B", /* name */
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false, /* partial_inplace */
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0x003, /* src_mask */
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0x003, /* dst_mask */
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false), /* pcrel_offset */
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/* A 16 bit PC-rel relocation */
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HOWTO (R_M68HC11_PCREL_16, /* type */
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0, /* rightshift */
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2, /* size */
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16, /* bitsize */
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true, /* pc_relative */
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0, /* bitpos */
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complain_overflow_dont, /* complain_on_overflow */
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bfd_elf_generic_reloc, /* special_function */
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"R_M68HC11_PCREL_16", /* name */
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false, /* partial_inplace */
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0xffff, /* src_mask */
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0xffff, /* dst_mask */
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true), /* pcrel_offset */
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/* GNU extension to record C++ vtable hierarchy */
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HOWTO (R_M68HC11_GNU_VTINHERIT, /* type */
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0, /* rightshift */
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2, /* size */
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0, /* bitsize */
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false, /* pc_relative */
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0, /* bitpos */
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complain_overflow_dont, /* complain_on_overflow */
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NULL, /* special_function */
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"R_M68HC11_GNU_VTINHERIT", /* name */
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false, /* partial_inplace */
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0, /* src_mask */
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0, /* dst_mask */
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false), /* pcrel_offset */
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/* GNU extension to record C++ vtable member usage */
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HOWTO (R_M68HC11_GNU_VTENTRY, /* type */
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0, /* rightshift */
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2, /* size */
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0, /* bitsize */
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false, /* pc_relative */
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0, /* bitpos */
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complain_overflow_dont, /* complain_on_overflow */
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_bfd_elf_rel_vtable_reloc_fn, /* special_function */
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"R_M68HC11_GNU_VTENTRY", /* name */
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false, /* partial_inplace */
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0, /* src_mask */
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0, /* dst_mask */
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false), /* pcrel_offset */
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/* A 24 bit relocation */
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HOWTO (R_M68HC11_24, /* type */
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0, /* rightshift */
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2, /* size */
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24, /* bitsize */
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false, /* pc_relative */
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0, /* bitpos */
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complain_overflow_bitfield, /* complain_on_overflow */
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bfd_elf_generic_reloc, /* special_function */
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"R_M68HC11_24", /* name */
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false, /* partial_inplace */
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0xffffff, /* src_mask */
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0xffffff, /* dst_mask */
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false), /* pcrel_offset */
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/* A 16-bit low relocation */
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HOWTO (R_M68HC11_LO16, /* type */
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0, /* rightshift */
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2, /* size */
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16, /* bitsize */
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false, /* pc_relative */
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0, /* bitpos */
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complain_overflow_bitfield, /* complain_on_overflow */
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bfd_elf_generic_reloc, /* special_function */
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"R_M68HC11_LO16", /* name */
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false, /* partial_inplace */
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0xffff, /* src_mask */
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0xffff, /* dst_mask */
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false), /* pcrel_offset */
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/* A page relocation */
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HOWTO (R_M68HC11_PAGE, /* type */
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0, /* rightshift */
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1, /* size */
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8, /* bitsize */
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false, /* pc_relative */
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0, /* bitpos */
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complain_overflow_bitfield, /* complain_on_overflow */
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bfd_elf_generic_reloc, /* special_function */
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"R_M68HC11_PAGE", /* name */
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false, /* partial_inplace */
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0x00ff, /* src_mask */
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0x00ff, /* dst_mask */
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false), /* pcrel_offset */
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EMPTY_HOWTO (14),
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EMPTY_HOWTO (15),
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EMPTY_HOWTO (16),
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EMPTY_HOWTO (17),
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EMPTY_HOWTO (18),
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EMPTY_HOWTO (19),
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/* Mark beginning of a jump instruction (any form). */
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HOWTO (R_M68HC11_RL_JUMP, /* type */
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0, /* rightshift */
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2, /* size */
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0, /* bitsize */
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false, /* pc_relative */
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0, /* bitpos */
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complain_overflow_dont, /* complain_on_overflow */
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m68hc11_elf_ignore_reloc, /* special_function */
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"R_M68HC11_RL_JUMP", /* name */
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true, /* partial_inplace */
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0, /* src_mask */
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0, /* dst_mask */
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true), /* pcrel_offset */
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/* Mark beginning of Gcc relaxation group instruction. */
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HOWTO (R_M68HC11_RL_GROUP, /* type */
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0, /* rightshift */
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2, /* size */
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0, /* bitsize */
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false, /* pc_relative */
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0, /* bitpos */
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complain_overflow_dont, /* complain_on_overflow */
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m68hc11_elf_ignore_reloc, /* special_function */
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"R_M68HC11_RL_GROUP", /* name */
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true, /* partial_inplace */
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0, /* src_mask */
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0, /* dst_mask */
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true), /* pcrel_offset */
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};
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/* Map BFD reloc types to M68HC11 ELF reloc types. */
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struct m68hc11_reloc_map
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{
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bfd_reloc_code_real_type bfd_reloc_val;
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unsigned char elf_reloc_val;
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};
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static const struct m68hc11_reloc_map m68hc11_reloc_map[] = {
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{BFD_RELOC_NONE, R_M68HC11_NONE,},
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{BFD_RELOC_8, R_M68HC11_8},
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{BFD_RELOC_M68HC11_HI8, R_M68HC11_HI8},
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{BFD_RELOC_M68HC11_LO8, R_M68HC11_LO8},
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{BFD_RELOC_8_PCREL, R_M68HC11_PCREL_8},
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{BFD_RELOC_16_PCREL, R_M68HC11_PCREL_16},
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{BFD_RELOC_16, R_M68HC11_16},
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{BFD_RELOC_32, R_M68HC11_32},
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{BFD_RELOC_M68HC11_3B, R_M68HC11_3B},
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{BFD_RELOC_VTABLE_INHERIT, R_M68HC11_GNU_VTINHERIT},
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{BFD_RELOC_VTABLE_ENTRY, R_M68HC11_GNU_VTENTRY},
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{BFD_RELOC_M68HC11_LO16, R_M68HC11_LO16},
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{BFD_RELOC_M68HC11_PAGE, R_M68HC11_PAGE},
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{BFD_RELOC_M68HC11_24, R_M68HC11_24},
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{BFD_RELOC_M68HC11_RL_JUMP, R_M68HC11_RL_JUMP},
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{BFD_RELOC_M68HC11_RL_GROUP, R_M68HC11_RL_GROUP},
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};
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static reloc_howto_type *
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bfd_elf32_bfd_reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED,
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bfd_reloc_code_real_type code)
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{
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unsigned int i;
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for (i = 0;
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i < sizeof (m68hc11_reloc_map) / sizeof (struct m68hc11_reloc_map);
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i++)
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{
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if (m68hc11_reloc_map[i].bfd_reloc_val == code)
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return &elf_m68hc11_howto_table[m68hc11_reloc_map[i].elf_reloc_val];
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}
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return NULL;
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}
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static reloc_howto_type *
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bfd_elf32_bfd_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED,
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const char *r_name)
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{
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unsigned int i;
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for (i = 0;
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i < (sizeof (elf_m68hc11_howto_table)
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/ sizeof (elf_m68hc11_howto_table[0]));
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i++)
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if (elf_m68hc11_howto_table[i].name != NULL
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&& strcasecmp (elf_m68hc11_howto_table[i].name, r_name) == 0)
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return &elf_m68hc11_howto_table[i];
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return NULL;
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}
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/* Set the howto pointer for an M68HC11 ELF reloc. */
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static bool
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m68hc11_info_to_howto_rel (bfd *abfd,
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arelent *cache_ptr, Elf_Internal_Rela *dst)
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{
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unsigned int r_type;
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r_type = ELF32_R_TYPE (dst->r_info);
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if (r_type >= (unsigned int) R_M68HC11_max)
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{
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/* xgettext:c-format */
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_bfd_error_handler (_("%pB: unsupported relocation type %#x"),
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abfd, r_type);
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bfd_set_error (bfd_error_bad_value);
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return false;
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}
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cache_ptr->howto = &elf_m68hc11_howto_table[r_type];
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return true;
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}
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|
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/* Far trampoline generation. */
|
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|
||
/* Build a 68HC11 trampoline stub. */
|
||
static bool
|
||
m68hc11_elf_build_one_stub (struct bfd_hash_entry *gen_entry, void *in_arg)
|
||
{
|
||
struct elf32_m68hc11_stub_hash_entry *stub_entry;
|
||
struct bfd_link_info *info;
|
||
struct m68hc11_elf_link_hash_table *htab;
|
||
asection *stub_sec;
|
||
bfd *stub_bfd;
|
||
bfd_byte *loc;
|
||
bfd_vma sym_value, phys_page, phys_addr;
|
||
|
||
/* Massage our args to the form they really have. */
|
||
stub_entry = (struct elf32_m68hc11_stub_hash_entry *) gen_entry;
|
||
info = (struct bfd_link_info *) in_arg;
|
||
|
||
/* Fail if the target section could not be assigned to an output
|
||
section. The user should fix his linker script. */
|
||
if (stub_entry->target_section->output_section == NULL
|
||
&& info->non_contiguous_regions)
|
||
info->callbacks->einfo (_("%F%P: Could not assign '%pA' to an output section. "
|
||
"Retry without --enable-non-contiguous-regions.\n"),
|
||
stub_entry->target_section);
|
||
|
||
htab = m68hc11_elf_hash_table (info);
|
||
if (htab == NULL)
|
||
return false;
|
||
|
||
stub_sec = stub_entry->stub_sec;
|
||
|
||
/* Make a note of the offset within the stubs for this entry. */
|
||
stub_entry->stub_offset = stub_sec->size;
|
||
stub_sec->size += 10;
|
||
loc = stub_sec->contents + stub_entry->stub_offset;
|
||
|
||
stub_bfd = stub_sec->owner;
|
||
|
||
/* Create the trampoline call stub:
|
||
|
||
pshb
|
||
ldab #%page(symbol)
|
||
ldy #%addr(symbol)
|
||
jmp __trampoline
|
||
|
||
*/
|
||
sym_value = (stub_entry->target_value
|
||
+ stub_entry->target_section->output_offset
|
||
+ stub_entry->target_section->output_section->vma);
|
||
phys_addr = m68hc11_phys_addr (&htab->pinfo, sym_value);
|
||
phys_page = m68hc11_phys_page (&htab->pinfo, sym_value);
|
||
|
||
/* pshb; ldab #%page(sym) */
|
||
bfd_put_8 (stub_bfd, 0x37, loc);
|
||
bfd_put_8 (stub_bfd, 0xC6, loc + 1);
|
||
bfd_put_8 (stub_bfd, phys_page, loc + 2);
|
||
loc += 3;
|
||
|
||
/* ldy #%addr(sym) */
|
||
bfd_put_8 (stub_bfd, 0x18, loc);
|
||
bfd_put_8 (stub_bfd, 0xCE, loc + 1);
|
||
bfd_put_16 (stub_bfd, phys_addr, loc + 2);
|
||
loc += 4;
|
||
|
||
/* jmp __trampoline */
|
||
bfd_put_8 (stub_bfd, 0x7E, loc);
|
||
bfd_put_16 (stub_bfd, htab->pinfo.trampoline_addr, loc + 1);
|
||
|
||
return true;
|
||
}
|
||
|
||
/* As above, but don't actually build the stub. Just bump offset so
|
||
we know stub section sizes. */
|
||
|
||
static bool
|
||
m68hc11_elf_size_one_stub (struct bfd_hash_entry *gen_entry,
|
||
void *in_arg ATTRIBUTE_UNUSED)
|
||
{
|
||
struct elf32_m68hc11_stub_hash_entry *stub_entry;
|
||
|
||
/* Massage our args to the form they really have. */
|
||
stub_entry = (struct elf32_m68hc11_stub_hash_entry *) gen_entry;
|
||
|
||
stub_entry->stub_sec->size += 10;
|
||
return true;
|
||
}
|
||
|
||
/* Create a 68HC11 ELF linker hash table. */
|
||
|
||
static struct bfd_link_hash_table *
|
||
m68hc11_elf_bfd_link_hash_table_create (bfd *abfd)
|
||
{
|
||
struct m68hc11_elf_link_hash_table *ret;
|
||
|
||
ret = m68hc11_elf_hash_table_create (abfd);
|
||
if (ret == (struct m68hc11_elf_link_hash_table *) NULL)
|
||
return NULL;
|
||
|
||
ret->size_one_stub = m68hc11_elf_size_one_stub;
|
||
ret->build_one_stub = m68hc11_elf_build_one_stub;
|
||
|
||
return &ret->root.root;
|
||
}
|
||
|
||
|
||
/* 68HC11 Linker Relaxation. */
|
||
|
||
const struct m68hc11_direct_relax
|
||
{
|
||
const char *name;
|
||
unsigned char code;
|
||
unsigned char direct_code;
|
||
} m68hc11_direct_relax_table[] = {
|
||
{ "adca", 0xB9, 0x99 },
|
||
{ "adcb", 0xF9, 0xD9 },
|
||
{ "adda", 0xBB, 0x9B },
|
||
{ "addb", 0xFB, 0xDB },
|
||
{ "addd", 0xF3, 0xD3 },
|
||
{ "anda", 0xB4, 0x94 },
|
||
{ "andb", 0xF4, 0xD4 },
|
||
{ "cmpa", 0xB1, 0x91 },
|
||
{ "cmpb", 0xF1, 0xD1 },
|
||
{ "cpd", 0xB3, 0x93 },
|
||
{ "cpxy", 0xBC, 0x9C },
|
||
/* { "cpy", 0xBC, 0x9C }, */
|
||
{ "eora", 0xB8, 0x98 },
|
||
{ "eorb", 0xF8, 0xD8 },
|
||
{ "jsr", 0xBD, 0x9D },
|
||
{ "ldaa", 0xB6, 0x96 },
|
||
{ "ldab", 0xF6, 0xD6 },
|
||
{ "ldd", 0xFC, 0xDC },
|
||
{ "lds", 0xBE, 0x9E },
|
||
{ "ldxy", 0xFE, 0xDE },
|
||
/* { "ldy", 0xFE, 0xDE },*/
|
||
{ "oraa", 0xBA, 0x9A },
|
||
{ "orab", 0xFA, 0xDA },
|
||
{ "sbca", 0xB2, 0x92 },
|
||
{ "sbcb", 0xF2, 0xD2 },
|
||
{ "staa", 0xB7, 0x97 },
|
||
{ "stab", 0xF7, 0xD7 },
|
||
{ "std", 0xFD, 0xDD },
|
||
{ "sts", 0xBF, 0x9F },
|
||
{ "stxy", 0xFF, 0xDF },
|
||
/* { "sty", 0xFF, 0xDF },*/
|
||
{ "suba", 0xB0, 0x90 },
|
||
{ "subb", 0xF0, 0xD0 },
|
||
{ "subd", 0xB3, 0x93 },
|
||
{ 0, 0, 0 }
|
||
};
|
||
|
||
static const struct m68hc11_direct_relax *
|
||
find_relaxable_insn (unsigned char code)
|
||
{
|
||
int i;
|
||
|
||
for (i = 0; m68hc11_direct_relax_table[i].name; i++)
|
||
if (m68hc11_direct_relax_table[i].code == code)
|
||
return &m68hc11_direct_relax_table[i];
|
||
|
||
return 0;
|
||
}
|
||
|
||
static int
|
||
compare_reloc (const void *e1, const void *e2)
|
||
{
|
||
const Elf_Internal_Rela *i1 = (const Elf_Internal_Rela *) e1;
|
||
const Elf_Internal_Rela *i2 = (const Elf_Internal_Rela *) e2;
|
||
|
||
if (i1->r_offset == i2->r_offset)
|
||
return 0;
|
||
else
|
||
return i1->r_offset < i2->r_offset ? -1 : 1;
|
||
}
|
||
|
||
#define M6811_OP_LDX_IMMEDIATE (0xCE)
|
||
|
||
static void
|
||
m68hc11_relax_group (bfd *abfd, asection *sec, bfd_byte *contents,
|
||
unsigned value, unsigned long offset,
|
||
unsigned long end_group)
|
||
{
|
||
unsigned char code;
|
||
unsigned long start_offset;
|
||
unsigned long ldx_offset = offset;
|
||
unsigned long ldx_size;
|
||
int can_delete_ldx;
|
||
int relax_ldy = 0;
|
||
|
||
/* First instruction of the relax group must be a
|
||
LDX #value or LDY #value. If this is not the case,
|
||
ignore the relax group. */
|
||
code = bfd_get_8 (abfd, contents + offset);
|
||
if (code == 0x18)
|
||
{
|
||
relax_ldy++;
|
||
offset++;
|
||
code = bfd_get_8 (abfd, contents + offset);
|
||
}
|
||
ldx_size = offset - ldx_offset + 3;
|
||
offset += 3;
|
||
if (code != M6811_OP_LDX_IMMEDIATE || offset >= end_group)
|
||
return;
|
||
|
||
|
||
/* We can remove the LDX/LDY only when all bset/brclr instructions
|
||
of the relax group have been converted to use direct addressing
|
||
mode. */
|
||
can_delete_ldx = 1;
|
||
while (offset < end_group)
|
||
{
|
||
unsigned isize;
|
||
unsigned new_value;
|
||
int bset_use_y;
|
||
|
||
bset_use_y = 0;
|
||
start_offset = offset;
|
||
code = bfd_get_8 (abfd, contents + offset);
|
||
if (code == 0x18)
|
||
{
|
||
bset_use_y++;
|
||
offset++;
|
||
code = bfd_get_8 (abfd, contents + offset);
|
||
}
|
||
|
||
/* Check the instruction and translate to use direct addressing mode. */
|
||
switch (code)
|
||
{
|
||
/* bset */
|
||
case 0x1C:
|
||
code = 0x14;
|
||
isize = 3;
|
||
break;
|
||
|
||
/* brclr */
|
||
case 0x1F:
|
||
code = 0x13;
|
||
isize = 4;
|
||
break;
|
||
|
||
/* brset */
|
||
case 0x1E:
|
||
code = 0x12;
|
||
isize = 4;
|
||
break;
|
||
|
||
/* bclr */
|
||
case 0x1D:
|
||
code = 0x15;
|
||
isize = 3;
|
||
break;
|
||
|
||
/* This instruction is not recognized and we are not
|
||
at end of the relax group. Ignore and don't remove
|
||
the first LDX (we don't know what it is used for...). */
|
||
default:
|
||
return;
|
||
}
|
||
new_value = (unsigned) bfd_get_8 (abfd, contents + offset + 1);
|
||
new_value += value;
|
||
if ((new_value & 0xff00) == 0 && bset_use_y == relax_ldy)
|
||
{
|
||
bfd_put_8 (abfd, code, contents + offset);
|
||
bfd_put_8 (abfd, new_value, contents + offset + 1);
|
||
if (start_offset != offset)
|
||
{
|
||
m68hc11_elf_relax_delete_bytes (abfd, sec, start_offset,
|
||
offset - start_offset);
|
||
end_group--;
|
||
}
|
||
}
|
||
else
|
||
{
|
||
can_delete_ldx = 0;
|
||
}
|
||
offset = start_offset + isize;
|
||
}
|
||
if (can_delete_ldx)
|
||
{
|
||
/* Remove the move instruction (3 or 4 bytes win). */
|
||
m68hc11_elf_relax_delete_bytes (abfd, sec, ldx_offset, ldx_size);
|
||
}
|
||
}
|
||
|
||
/* This function handles relaxing for the 68HC11.
|
||
|
||
|
||
and somewhat more difficult to support. */
|
||
|
||
static bool
|
||
m68hc11_elf_relax_section (bfd *abfd, asection *sec,
|
||
struct bfd_link_info *link_info, bool *again)
|
||
{
|
||
Elf_Internal_Shdr *symtab_hdr;
|
||
Elf_Internal_Rela *internal_relocs;
|
||
Elf_Internal_Rela *free_relocs = NULL;
|
||
Elf_Internal_Rela *irel, *irelend;
|
||
bfd_byte *contents = NULL;
|
||
bfd_byte *free_contents = NULL;
|
||
Elf32_External_Sym *free_extsyms = NULL;
|
||
Elf_Internal_Rela *prev_insn_branch = NULL;
|
||
Elf_Internal_Rela *prev_insn_group = NULL;
|
||
unsigned insn_group_value = 0;
|
||
Elf_Internal_Sym *isymbuf = NULL;
|
||
|
||
/* Assume nothing changes. */
|
||
*again = false;
|
||
|
||
/* We don't have to do anything for a relocatable link, if
|
||
this section does not have relocs, or if this is not a
|
||
code section. */
|
||
if (bfd_link_relocatable (link_info)
|
||
|| (sec->flags & SEC_RELOC) == 0
|
||
|| sec->reloc_count == 0
|
||
|| (sec->flags & SEC_CODE) == 0)
|
||
return true;
|
||
|
||
symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
|
||
|
||
/* Get a copy of the native relocations. */
|
||
internal_relocs = (_bfd_elf_link_read_relocs
|
||
(abfd, sec, NULL, (Elf_Internal_Rela *) NULL,
|
||
link_info->keep_memory));
|
||
if (internal_relocs == NULL)
|
||
goto error_return;
|
||
if (! link_info->keep_memory)
|
||
free_relocs = internal_relocs;
|
||
|
||
/* Checking for branch relaxation relies on the relocations to
|
||
be sorted on 'r_offset'. This is not guaranteed so we must sort. */
|
||
qsort (internal_relocs, sec->reloc_count, sizeof (Elf_Internal_Rela),
|
||
compare_reloc);
|
||
|
||
/* Walk through them looking for relaxing opportunities. */
|
||
irelend = internal_relocs + sec->reloc_count;
|
||
for (irel = internal_relocs; irel < irelend; irel++)
|
||
{
|
||
bfd_vma symval;
|
||
bfd_vma value;
|
||
Elf_Internal_Sym *isym;
|
||
asection *sym_sec;
|
||
int is_far = 0;
|
||
|
||
/* If this isn't something that can be relaxed, then ignore
|
||
this reloc. */
|
||
if (ELF32_R_TYPE (irel->r_info) != (int) R_M68HC11_16
|
||
&& ELF32_R_TYPE (irel->r_info) != (int) R_M68HC11_RL_JUMP
|
||
&& ELF32_R_TYPE (irel->r_info) != (int) R_M68HC11_RL_GROUP)
|
||
{
|
||
prev_insn_branch = 0;
|
||
prev_insn_group = 0;
|
||
continue;
|
||
}
|
||
|
||
/* Get the section contents if we haven't done so already. */
|
||
if (contents == NULL)
|
||
{
|
||
/* Get cached copy if it exists. */
|
||
if (elf_section_data (sec)->this_hdr.contents != NULL)
|
||
contents = elf_section_data (sec)->this_hdr.contents;
|
||
else
|
||
{
|
||
/* Go get them off disk. */
|
||
if (!bfd_malloc_and_get_section (abfd, sec, &contents))
|
||
goto error_return;
|
||
}
|
||
}
|
||
|
||
/* Try to eliminate an unconditional 8 bit pc-relative branch
|
||
which immediately follows a conditional 8 bit pc-relative
|
||
branch around the unconditional branch.
|
||
|
||
original: new:
|
||
bCC lab1 bCC' lab2
|
||
bra lab2
|
||
lab1: lab1:
|
||
|
||
This happens when the bCC can't reach lab2 at assembly time,
|
||
but due to other relaxations it can reach at link time. */
|
||
if (ELF32_R_TYPE (irel->r_info) == (int) R_M68HC11_RL_JUMP)
|
||
{
|
||
Elf_Internal_Rela *nrel;
|
||
unsigned char code;
|
||
unsigned char roffset;
|
||
|
||
prev_insn_branch = 0;
|
||
prev_insn_group = 0;
|
||
|
||
/* Do nothing if this reloc is the last byte in the section. */
|
||
if (irel->r_offset + 2 >= sec->size)
|
||
continue;
|
||
|
||
/* See if the next instruction is an unconditional pc-relative
|
||
branch, more often than not this test will fail, so we
|
||
test it first to speed things up. */
|
||
code = bfd_get_8 (abfd, contents + irel->r_offset + 2);
|
||
if (code != 0x7e)
|
||
continue;
|
||
|
||
/* Also make sure the next relocation applies to the next
|
||
instruction and that it's a pc-relative 8 bit branch. */
|
||
nrel = irel + 1;
|
||
if (nrel == irelend
|
||
|| irel->r_offset + 3 != nrel->r_offset
|
||
|| ELF32_R_TYPE (nrel->r_info) != (int) R_M68HC11_16)
|
||
continue;
|
||
|
||
/* Make sure our destination immediately follows the
|
||
unconditional branch. */
|
||
roffset = bfd_get_8 (abfd, contents + irel->r_offset + 1);
|
||
if (roffset != 3)
|
||
continue;
|
||
|
||
prev_insn_branch = irel;
|
||
prev_insn_group = 0;
|
||
continue;
|
||
}
|
||
|
||
/* Read this BFD's symbols if we haven't done so already. */
|
||
if (isymbuf == NULL && symtab_hdr->sh_info != 0)
|
||
{
|
||
isymbuf = (Elf_Internal_Sym *) symtab_hdr->contents;
|
||
if (isymbuf == NULL)
|
||
isymbuf = bfd_elf_get_elf_syms (abfd, symtab_hdr,
|
||
symtab_hdr->sh_info, 0,
|
||
NULL, NULL, NULL);
|
||
if (isymbuf == NULL)
|
||
goto error_return;
|
||
}
|
||
|
||
/* Get the value of the symbol referred to by the reloc. */
|
||
if (ELF32_R_SYM (irel->r_info) < symtab_hdr->sh_info)
|
||
{
|
||
/* A local symbol. */
|
||
isym = isymbuf + ELF32_R_SYM (irel->r_info);
|
||
is_far = isym->st_other & STO_M68HC12_FAR;
|
||
sym_sec = bfd_section_from_elf_index (abfd, isym->st_shndx);
|
||
symval = (isym->st_value
|
||
+ sym_sec->output_section->vma
|
||
+ sym_sec->output_offset);
|
||
}
|
||
else
|
||
{
|
||
unsigned long indx;
|
||
struct elf_link_hash_entry *h;
|
||
|
||
/* An external symbol. */
|
||
indx = ELF32_R_SYM (irel->r_info) - symtab_hdr->sh_info;
|
||
h = elf_sym_hashes (abfd)[indx];
|
||
BFD_ASSERT (h != NULL);
|
||
if (h->root.type != bfd_link_hash_defined
|
||
&& h->root.type != bfd_link_hash_defweak)
|
||
{
|
||
/* This appears to be a reference to an undefined
|
||
symbol. Just ignore it--it will be caught by the
|
||
regular reloc processing. */
|
||
prev_insn_branch = 0;
|
||
prev_insn_group = 0;
|
||
continue;
|
||
}
|
||
|
||
is_far = h->other & STO_M68HC12_FAR;
|
||
isym = 0;
|
||
sym_sec = h->root.u.def.section;
|
||
symval = (h->root.u.def.value
|
||
+ sym_sec->output_section->vma
|
||
+ sym_sec->output_offset);
|
||
}
|
||
|
||
if (ELF32_R_TYPE (irel->r_info) == (int) R_M68HC11_RL_GROUP)
|
||
{
|
||
prev_insn_branch = 0;
|
||
prev_insn_group = 0;
|
||
|
||
/* Do nothing if this reloc is the last byte in the section. */
|
||
if (irel->r_offset == sec->size)
|
||
continue;
|
||
|
||
prev_insn_group = irel;
|
||
insn_group_value = isym->st_value;
|
||
continue;
|
||
}
|
||
|
||
/* When we relax some bytes, the size of our section changes.
|
||
This affects the layout of next input sections that go in our
|
||
output section. When the symbol is part of another section that
|
||
will go in the same output section as the current one, it's
|
||
final address may now be incorrect (too far). We must let the
|
||
linker re-compute all section offsets before processing this
|
||
reloc. Code example:
|
||
|
||
Initial Final
|
||
.sect .text section size = 6 section size = 4
|
||
jmp foo
|
||
jmp bar
|
||
.sect .text.foo_bar output_offset = 6 output_offset = 4
|
||
foo: rts
|
||
bar: rts
|
||
|
||
If we process the reloc now, the jmp bar is replaced by a
|
||
relative branch to the initial bar address (output_offset 6). */
|
||
if (*again && sym_sec != sec
|
||
&& sym_sec->output_section == sec->output_section)
|
||
{
|
||
prev_insn_group = 0;
|
||
prev_insn_branch = 0;
|
||
continue;
|
||
}
|
||
|
||
value = symval;
|
||
/* Try to turn a far branch to a near branch. */
|
||
if (ELF32_R_TYPE (irel->r_info) == (int) R_M68HC11_16
|
||
&& prev_insn_branch)
|
||
{
|
||
bfd_vma offset;
|
||
unsigned char code;
|
||
|
||
offset = value - (prev_insn_branch->r_offset
|
||
+ sec->output_section->vma
|
||
+ sec->output_offset + 2);
|
||
|
||
/* If the offset is still out of -128..+127 range,
|
||
leave that far branch unchanged. */
|
||
if ((offset & 0xff80) != 0 && (offset & 0xff80) != 0xff80)
|
||
{
|
||
prev_insn_branch = 0;
|
||
continue;
|
||
}
|
||
|
||
/* Shrink the branch. */
|
||
code = bfd_get_8 (abfd, contents + prev_insn_branch->r_offset);
|
||
if (code == 0x7e)
|
||
{
|
||
code = 0x20;
|
||
bfd_put_8 (abfd, code, contents + prev_insn_branch->r_offset);
|
||
bfd_put_8 (abfd, 0xff,
|
||
contents + prev_insn_branch->r_offset + 1);
|
||
irel->r_offset = prev_insn_branch->r_offset + 1;
|
||
irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info),
|
||
R_M68HC11_PCREL_8);
|
||
m68hc11_elf_relax_delete_bytes (abfd, sec,
|
||
irel->r_offset + 1, 1);
|
||
}
|
||
else
|
||
{
|
||
code ^= 0x1;
|
||
bfd_put_8 (abfd, code, contents + prev_insn_branch->r_offset);
|
||
bfd_put_8 (abfd, 0xff,
|
||
contents + prev_insn_branch->r_offset + 1);
|
||
irel->r_offset = prev_insn_branch->r_offset + 1;
|
||
irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info),
|
||
R_M68HC11_PCREL_8);
|
||
m68hc11_elf_relax_delete_bytes (abfd, sec,
|
||
irel->r_offset + 1, 3);
|
||
}
|
||
prev_insn_branch = 0;
|
||
*again = true;
|
||
}
|
||
|
||
/* Try to turn a 16 bit address into a 8 bit page0 address. */
|
||
else if (ELF32_R_TYPE (irel->r_info) == (int) R_M68HC11_16
|
||
&& (value & 0xff00) == 0)
|
||
{
|
||
unsigned char code;
|
||
unsigned short offset;
|
||
const struct m68hc11_direct_relax *rinfo;
|
||
|
||
prev_insn_branch = 0;
|
||
offset = bfd_get_16 (abfd, contents + irel->r_offset);
|
||
offset += value;
|
||
if ((offset & 0xff00) != 0)
|
||
{
|
||
prev_insn_group = 0;
|
||
continue;
|
||
}
|
||
|
||
if (prev_insn_group)
|
||
{
|
||
unsigned long old_sec_size = sec->size;
|
||
|
||
/* Note that we've changed the relocation contents, etc. */
|
||
elf_section_data (sec)->relocs = internal_relocs;
|
||
free_relocs = NULL;
|
||
|
||
elf_section_data (sec)->this_hdr.contents = contents;
|
||
free_contents = NULL;
|
||
|
||
symtab_hdr->contents = (bfd_byte *) isymbuf;
|
||
free_extsyms = NULL;
|
||
|
||
m68hc11_relax_group (abfd, sec, contents, offset,
|
||
prev_insn_group->r_offset,
|
||
insn_group_value);
|
||
irel = prev_insn_group;
|
||
prev_insn_group = 0;
|
||
irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info),
|
||
R_M68HC11_NONE);
|
||
if (sec->size != old_sec_size)
|
||
*again = true;
|
||
continue;
|
||
}
|
||
|
||
/* Get the opcode. */
|
||
code = bfd_get_8 (abfd, contents + irel->r_offset - 1);
|
||
rinfo = find_relaxable_insn (code);
|
||
if (rinfo == 0)
|
||
{
|
||
prev_insn_group = 0;
|
||
continue;
|
||
}
|
||
|
||
/* Note that we've changed the relocation contents, etc. */
|
||
elf_section_data (sec)->relocs = internal_relocs;
|
||
free_relocs = NULL;
|
||
|
||
elf_section_data (sec)->this_hdr.contents = contents;
|
||
free_contents = NULL;
|
||
|
||
symtab_hdr->contents = (bfd_byte *) isymbuf;
|
||
free_extsyms = NULL;
|
||
|
||
/* Fix the opcode. */
|
||
/* printf ("A relaxable case : 0x%02x (%s)\n",
|
||
code, rinfo->name); */
|
||
bfd_put_8 (abfd, rinfo->direct_code,
|
||
contents + irel->r_offset - 1);
|
||
|
||
/* Delete one byte of data (upper byte of address). */
|
||
m68hc11_elf_relax_delete_bytes (abfd, sec, irel->r_offset, 1);
|
||
|
||
/* Fix the relocation's type. */
|
||
irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info),
|
||
R_M68HC11_8);
|
||
|
||
/* That will change things, so, we should relax again. */
|
||
*again = true;
|
||
}
|
||
else if (ELF32_R_TYPE (irel->r_info) == R_M68HC11_16 && !is_far)
|
||
{
|
||
unsigned char code;
|
||
bfd_vma offset;
|
||
|
||
prev_insn_branch = 0;
|
||
code = bfd_get_8 (abfd, contents + irel->r_offset - 1);
|
||
if (code == 0x7e || code == 0xbd)
|
||
{
|
||
offset = value - (irel->r_offset
|
||
+ sec->output_section->vma
|
||
+ sec->output_offset + 1);
|
||
offset += bfd_get_16 (abfd, contents + irel->r_offset);
|
||
|
||
/* If the offset is still out of -128..+127 range,
|
||
leave that far branch unchanged. */
|
||
if ((offset & 0xff80) == 0 || (offset & 0xff80) == 0xff80)
|
||
{
|
||
|
||
/* Note that we've changed the relocation contents, etc. */
|
||
elf_section_data (sec)->relocs = internal_relocs;
|
||
free_relocs = NULL;
|
||
|
||
elf_section_data (sec)->this_hdr.contents = contents;
|
||
free_contents = NULL;
|
||
|
||
symtab_hdr->contents = (bfd_byte *) isymbuf;
|
||
free_extsyms = NULL;
|
||
|
||
/* Shrink the branch. */
|
||
code = (code == 0x7e) ? 0x20 : 0x8d;
|
||
bfd_put_8 (abfd, code,
|
||
contents + irel->r_offset - 1);
|
||
bfd_put_8 (abfd, 0xff,
|
||
contents + irel->r_offset);
|
||
irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info),
|
||
R_M68HC11_PCREL_8);
|
||
m68hc11_elf_relax_delete_bytes (abfd, sec,
|
||
irel->r_offset + 1, 1);
|
||
/* That will change things, so, we should relax again. */
|
||
*again = true;
|
||
}
|
||
}
|
||
}
|
||
prev_insn_branch = 0;
|
||
prev_insn_group = 0;
|
||
}
|
||
|
||
free (free_relocs);
|
||
free_relocs = NULL;
|
||
|
||
if (free_contents != NULL)
|
||
{
|
||
if (! link_info->keep_memory)
|
||
free (free_contents);
|
||
else
|
||
{
|
||
/* Cache the section contents for elf_link_input_bfd. */
|
||
elf_section_data (sec)->this_hdr.contents = contents;
|
||
}
|
||
free_contents = NULL;
|
||
}
|
||
|
||
if (free_extsyms != NULL)
|
||
{
|
||
if (! link_info->keep_memory)
|
||
free (free_extsyms);
|
||
else
|
||
{
|
||
/* Cache the symbols for elf_link_input_bfd. */
|
||
symtab_hdr->contents = (unsigned char *) isymbuf;
|
||
}
|
||
free_extsyms = NULL;
|
||
}
|
||
|
||
return true;
|
||
|
||
error_return:
|
||
free (free_relocs);
|
||
free (free_contents);
|
||
free (free_extsyms);
|
||
return false;
|
||
}
|
||
|
||
/* Delete some bytes from a section while relaxing. */
|
||
|
||
static void
|
||
m68hc11_elf_relax_delete_bytes (bfd *abfd, asection *sec,
|
||
bfd_vma addr, int count)
|
||
{
|
||
Elf_Internal_Shdr *symtab_hdr;
|
||
unsigned int sec_shndx;
|
||
bfd_byte *contents;
|
||
Elf_Internal_Rela *irel, *irelend;
|
||
bfd_vma toaddr;
|
||
Elf_Internal_Sym *isymbuf, *isym, *isymend;
|
||
struct elf_link_hash_entry **sym_hashes;
|
||
struct elf_link_hash_entry **end_hashes;
|
||
unsigned int symcount;
|
||
|
||
symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
|
||
isymbuf = (Elf_Internal_Sym *) symtab_hdr->contents;
|
||
|
||
sec_shndx = _bfd_elf_section_from_bfd_section (abfd, sec);
|
||
|
||
contents = elf_section_data (sec)->this_hdr.contents;
|
||
|
||
toaddr = sec->size;
|
||
|
||
irel = elf_section_data (sec)->relocs;
|
||
irelend = irel + sec->reloc_count;
|
||
|
||
/* Actually delete the bytes. */
|
||
memmove (contents + addr, contents + addr + count,
|
||
(size_t) (toaddr - addr - count));
|
||
|
||
sec->size -= count;
|
||
|
||
/* Adjust all the relocs. */
|
||
for (irel = elf_section_data (sec)->relocs; irel < irelend; irel++)
|
||
{
|
||
unsigned char code;
|
||
unsigned char offset;
|
||
unsigned short raddr;
|
||
unsigned long old_offset;
|
||
int branch_pos;
|
||
|
||
old_offset = irel->r_offset;
|
||
|
||
/* See if this reloc was for the bytes we have deleted, in which
|
||
case we no longer care about it. Don't delete relocs which
|
||
represent addresses, though. */
|
||
if (ELF32_R_TYPE (irel->r_info) != R_M68HC11_RL_JUMP
|
||
&& irel->r_offset >= addr && irel->r_offset < addr + count)
|
||
irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info),
|
||
R_M68HC11_NONE);
|
||
|
||
if (ELF32_R_TYPE (irel->r_info) == R_M68HC11_NONE)
|
||
continue;
|
||
|
||
/* Get the new reloc address. */
|
||
if ((irel->r_offset > addr
|
||
&& irel->r_offset < toaddr))
|
||
irel->r_offset -= count;
|
||
|
||
/* If this is a PC relative reloc, see if the range it covers
|
||
includes the bytes we have deleted. */
|
||
switch (ELF32_R_TYPE (irel->r_info))
|
||
{
|
||
default:
|
||
break;
|
||
|
||
case R_M68HC11_RL_JUMP:
|
||
code = bfd_get_8 (abfd, contents + irel->r_offset);
|
||
switch (code)
|
||
{
|
||
/* jsr and jmp instruction are also marked with RL_JUMP
|
||
relocs but no adjustment must be made. */
|
||
case 0x7e:
|
||
case 0x9d:
|
||
case 0xbd:
|
||
continue;
|
||
|
||
case 0x12:
|
||
case 0x13:
|
||
branch_pos = 3;
|
||
raddr = 4;
|
||
|
||
/* Special case when we translate a brclr N,y into brclr *<addr>
|
||
In this case, the 0x18 page2 prefix is removed.
|
||
The reloc offset is not modified but the instruction
|
||
size is reduced by 1. */
|
||
if (old_offset == addr)
|
||
raddr++;
|
||
break;
|
||
|
||
case 0x1e:
|
||
case 0x1f:
|
||
branch_pos = 3;
|
||
raddr = 4;
|
||
break;
|
||
|
||
case 0x18:
|
||
branch_pos = 4;
|
||
raddr = 5;
|
||
break;
|
||
|
||
default:
|
||
branch_pos = 1;
|
||
raddr = 2;
|
||
break;
|
||
}
|
||
offset = bfd_get_8 (abfd, contents + irel->r_offset + branch_pos);
|
||
raddr += old_offset;
|
||
raddr += ((unsigned short) offset | ((offset & 0x80) ? 0xff00 : 0));
|
||
if (irel->r_offset < addr && raddr > addr)
|
||
{
|
||
offset -= count;
|
||
bfd_put_8 (abfd, offset, contents + irel->r_offset + branch_pos);
|
||
}
|
||
else if (irel->r_offset >= addr && raddr <= addr)
|
||
{
|
||
offset += count;
|
||
bfd_put_8 (abfd, offset, contents + irel->r_offset + branch_pos);
|
||
}
|
||
else
|
||
{
|
||
/*printf ("Not adjusted 0x%04x [0x%4x 0x%4x]\n", raddr,
|
||
irel->r_offset, addr);*/
|
||
}
|
||
|
||
break;
|
||
}
|
||
}
|
||
|
||
/* Adjust the local symbols defined in this section. */
|
||
isymend = isymbuf + symtab_hdr->sh_info;
|
||
for (isym = isymbuf; isym < isymend; isym++)
|
||
{
|
||
if (isym->st_shndx == sec_shndx
|
||
&& isym->st_value > addr
|
||
&& isym->st_value <= toaddr)
|
||
isym->st_value -= count;
|
||
}
|
||
|
||
/* Now adjust the global symbols defined in this section. */
|
||
symcount = (symtab_hdr->sh_size / sizeof (Elf32_External_Sym)
|
||
- symtab_hdr->sh_info);
|
||
sym_hashes = elf_sym_hashes (abfd);
|
||
end_hashes = sym_hashes + symcount;
|
||
for (; sym_hashes < end_hashes; sym_hashes++)
|
||
{
|
||
struct elf_link_hash_entry *sym_hash = *sym_hashes;
|
||
if ((sym_hash->root.type == bfd_link_hash_defined
|
||
|| sym_hash->root.type == bfd_link_hash_defweak)
|
||
&& sym_hash->root.u.def.section == sec
|
||
&& sym_hash->root.u.def.value > addr
|
||
&& sym_hash->root.u.def.value <= toaddr)
|
||
{
|
||
sym_hash->root.u.def.value -= count;
|
||
}
|
||
}
|
||
}
|
||
|
||
/* Specific sections:
|
||
- The .page0 is a data section that is mapped in [0x0000..0x00FF].
|
||
Page0 accesses are faster on the M68HC11. Soft registers used by GCC-m6811
|
||
are located in .page0.
|
||
- The .vectors is the section that represents the interrupt
|
||
vectors. */
|
||
static const struct bfd_elf_special_section elf32_m68hc11_special_sections[] =
|
||
{
|
||
{ STRING_COMMA_LEN (".eeprom"), 0, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE },
|
||
{ STRING_COMMA_LEN (".page0"), 0, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE },
|
||
{ STRING_COMMA_LEN (".softregs"), 0, SHT_NOBITS, SHF_ALLOC + SHF_WRITE },
|
||
{ STRING_COMMA_LEN (".vectors"), 0, SHT_PROGBITS, SHF_ALLOC },
|
||
{ NULL, 0, 0, 0, 0 }
|
||
};
|
||
|
||
#define ELF_ARCH bfd_arch_m68hc11
|
||
#define ELF_TARGET_ID M68HC11_ELF_DATA
|
||
#define ELF_MACHINE_CODE EM_68HC11
|
||
#define ELF_MAXPAGESIZE 0x1000
|
||
|
||
#define TARGET_BIG_SYM m68hc11_elf32_vec
|
||
#define TARGET_BIG_NAME "elf32-m68hc11"
|
||
|
||
#define elf_info_to_howto NULL
|
||
#define elf_info_to_howto_rel m68hc11_info_to_howto_rel
|
||
#define bfd_elf32_bfd_relax_section m68hc11_elf_relax_section
|
||
#define elf_backend_check_relocs elf32_m68hc11_check_relocs
|
||
#define elf_backend_relocate_section elf32_m68hc11_relocate_section
|
||
#define elf_backend_add_symbol_hook elf32_m68hc11_add_symbol_hook
|
||
#define elf_backend_object_p 0
|
||
#define elf_backend_can_gc_sections 1
|
||
#define elf_backend_special_sections elf32_m68hc11_special_sections
|
||
#define elf_backend_merge_symbol_attribute elf32_m68hc11_merge_symbol_attribute
|
||
|
||
#define bfd_elf32_bfd_link_hash_table_create \
|
||
m68hc11_elf_bfd_link_hash_table_create
|
||
#define bfd_elf32_bfd_merge_private_bfd_data \
|
||
_bfd_m68hc11_elf_merge_private_bfd_data
|
||
#define bfd_elf32_bfd_set_private_flags _bfd_m68hc11_elf_set_private_flags
|
||
#define bfd_elf32_bfd_print_private_bfd_data \
|
||
_bfd_m68hc11_elf_print_private_bfd_data
|
||
|
||
#include "elf32-target.h"
|