include/coff/arm.h

   1 /* ARM COFF support for BFD.
   2    Copyright (C) 1998-2021 Free Software Foundation, Inc.
   3
   4    This file is part of BFD, the Binary File Descriptor library.
   5
   6    This program is free software; you can redistribute it and/or modify
   7    it under the terms of the GNU General Public License as published by
   8    the Free Software Foundation; either version 3 of the License, or
   9    (at your option) any later version.
  10
  11    This program is distributed in the hope that it will be useful,
  12    but WITHOUT ANY WARRANTY; without even the implied warranty of
  13    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14    GNU General Public License for more details.
  15
  16    You should have received a copy of the GNU General Public License
  17    along with this program; if not, write to the Free Software Foundation,
  18    Inc., 51 Franklin Street - Fifth Floor, Boston, MA 02110-1301, USA.  */
  19
  20 #define COFFARM 1
  21
  22 #define L_LNNO_SIZE 2
  23 #define INCLUDE_COMDAT_FIELDS_IN_AUXENT
  24 #include "coff/external.h"
  25
  26 /* Bits for f_flags:
  27         F_RELFLG        relocation info stripped from file
  28         F_EXEC          file is executable (no unresolved external references)
  29         F_LNNO          line numbers stripped from file
  30         F_LSYMS         local symbols stripped from file
  31         F_INTERWORK     file supports switching between ARM and Thumb instruction sets
  32         F_INTERWORK_SET the F_INTERWORK bit is valid
  33         F_APCS_FLOAT    code passes float arguments in float registers
  34         F_PIC           code is reentrant/position-independent
  35         F_AR32WR        file has byte ordering of an AR32WR machine (e.g. vax)
  36         F_APCS_26       file uses 26 bit ARM Procedure Calling Standard
  37         F_APCS_SET      the F_APCS_26, F_APCS_FLOAT and F_PIC bits have been initialised
  38         F_SOFT_FLOAT    code does not use floating point instructions.  */
  39
  40 #define F_RELFLG        (0x0001)
  41 #define F_EXEC          (0x0002)
  42 #define F_LNNO          (0x0004)
  43 #define F_LSYMS         (0x0008)
  44 #define F_INTERWORK     (0x0010)
  45 #define F_INTERWORK_SET (0x0020)
  46 #define F_APCS_FLOAT    (0x0040)
  47 #undef  F_AR16WR
  48 #define F_PIC           (0x0080)
  49 #define F_AR32WR        (0x0100)
  50 #define F_APCS_26       (0x0400)
  51 #define F_APCS_SET      (0x0800)
  52 #define F_SOFT_FLOAT    (0x2000)
  53 #define F_VFP_FLOAT     (0x4000)
  54
  55 /* Bits stored in flags field of the internal_f structure */
  56
  57 #define F_INTERWORK     (0x0010)
  58 #define F_APCS_FLOAT    (0x0040)
  59 #define F_PIC           (0x0080)
  60 #define F_APCS26        (0x1000)
  61 #define F_ARM_ARCHITECTURE_MASK (0x4000+0x0800+0x0400)
  62 #define F_ARM_2         (0x0400)
  63 #define F_ARM_2a        (0x0800)
  64 #define F_ARM_3         (0x0c00)
  65 #define F_ARM_3M        (0x4000)
  66 #define F_ARM_4         (0x4400)
  67 #define F_ARM_4T        (0x4800)
  68 #define F_ARM_5         (0x4c00)
  69
  70 /*
  71   ARMMAGIC ought to encoded the procesor type,
  72   but it is too late to change it now, instead
  73   the flags field of the internal_f structure
  74   is used as shown above.
  75
  76   XXX - NC 5/6/97.  */
  77
  78 #define ARMMAGIC        0xa00  /* I just made this up */
  79
  80 #define ARMBADMAG(x) (((x).f_magic != ARMMAGIC))
  81
  82 #define ARMPEMAGIC      0x1c0
  83 #define THUMBPEMAGIC    0x1c2
  84 #define ARMV7PEMAGIC    0x1c4
  85
  86 #undef  ARMBADMAG
  87 #define ARMBADMAG(x) (((x).f_magic != ARMMAGIC) && ((x).f_magic != ARMPEMAGIC) && ((x).f_magic != THUMBPEMAGIC) && ((x).f_magic != ARMV7PEMAGIC))
  88
  89 #define OMAGIC          0404    /* object files, eg as output */
  90 #define ZMAGIC          0413    /* demand load format, eg normal ld output */
  91 #define STMAGIC         0401    /* target shlib */
  92 #define SHMAGIC         0443    /* host   shlib */
  93
  94 /* define some NT default values */
  95 /*  #define NT_IMAGE_BASE        0x400000 moved to internal.h */
  96 #define NT_SECTION_ALIGNMENT 0x1000
  97 #define NT_FILE_ALIGNMENT    0x200
  98 #define NT_DEF_RESERVE       0x100000
  99 #define NT_DEF_COMMIT        0x1000
 100
 101 /* We use the .rdata section to hold read only data.  */
 102 #define _LIT    ".rdata"
 103
 104 /********************** RELOCATION DIRECTIVES **********************/
 105 #ifdef ARM_WINCE
 106 struct external_reloc
 107 {
 108   char r_vaddr[4];
 109   char r_symndx[4];
 110   char r_type[2];
 111 };
 112
 113 #define RELOC struct external_reloc
 114 #define RELSZ 10
 115
 116 #else
 117 struct external_reloc
 118 {
 119   char r_vaddr[4];
 120   char r_symndx[4];
 121   char r_type[2];
 122   char r_offset[4];
 123 };
 124
 125 #define RELOC struct external_reloc
 126 #define RELSZ 14
 127 #endif
 128
 129 #define ARM_NOTE_SECTION ".note"