arm.h revision 60484
1/* ARM COFF support for BFD. 2 Copyright (C) 1998, 1999 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 2 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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ 19 20#define COFFARM 1 21 22/********************** FILE HEADER **********************/ 23 24struct external_filehdr 25{ 26 char f_magic[2]; /* magic number */ 27 char f_nscns[2]; /* number of sections */ 28 char f_timdat[4]; /* time & date stamp */ 29 char f_symptr[4]; /* file pointer to symtab */ 30 char f_nsyms[4]; /* number of symtab entries */ 31 char f_opthdr[2]; /* sizeof(optional hdr) */ 32 char f_flags[2]; /* flags */ 33}; 34 35/* Bits for f_flags: 36 * F_RELFLG relocation info stripped from file 37 * F_EXEC file is executable (no unresolved external references) 38 * F_LNNO line numbers stripped from file 39 * F_LSYMS local symbols stripped from file 40 * F_INTERWORK file supports switching between ARM and Thumb instruction sets 41 * F_INTERWORK_SET the F_INTERWORK bit is valid 42 * F_APCS_FLOAT code passes float arguments in float registers 43 * F_PIC code is reentrant/position-independent 44 * F_AR32WR file has byte ordering of an AR32WR machine (e.g. vax) 45 * F_APCS_26 file uses 26 bit ARM Procedure Calling Standard 46 * F_APCS_SET the F_APCS_26, F_APCS_FLOAT and F_PIC bits have been initialised 47 * F_SOFT_FLOAT code does not use floating point instructions 48 */ 49 50#define F_RELFLG (0x0001) 51#define F_EXEC (0x0002) 52#define F_LNNO (0x0004) 53#define F_LSYMS (0x0008) 54#define F_INTERWORK (0x0010) 55#define F_INTERWORK_SET (0x0020) 56#define F_APCS_FLOAT (0x0040) 57#undef F_AR16WR 58#define F_PIC (0x0080) 59#define F_AR32WR (0x0100) 60#define F_APCS_26 (0x0400) 61#define F_APCS_SET (0x0800) 62#define F_SOFT_FLOAT (0x2000) 63 64/* Bits stored in flags field of the internal_f structure */ 65 66#define F_INTERWORK (0x0010) 67#define F_APCS_FLOAT (0x0040) 68#define F_PIC (0x0080) 69#define F_APCS26 (0x1000) 70#define F_ARM_ARCHITECTURE_MASK (0x4000+0x0800+0x0400) 71#define F_ARM_2 (0x0400) 72#define F_ARM_2a (0x0800) 73#define F_ARM_3 (0x0c00) 74#define F_ARM_3M (0x4000) 75#define F_ARM_4 (0x4400) 76#define F_ARM_4T (0x4800) 77#define F_ARM_5 (0x4c00) 78 79/* 80 * ARMMAGIC ought to encoded the procesor type, 81 * but it is too late to change it now, instead 82 * the flags field of the internal_f structure 83 * is used as shown above. 84 * 85 * XXX - NC 5/6/97 86 */ 87 88#define ARMMAGIC 0xa00 /* I just made this up */ 89 90#define ARMBADMAG(x) (((x).f_magic != ARMMAGIC)) 91 92#define ARMPEMAGIC 0x1c0 93#define THUMBPEMAGIC 0x1c2 94 95#undef ARMBADMAG 96#define ARMBADMAG(x) (((x).f_magic != ARMMAGIC) && ((x).f_magic != ARMPEMAGIC) && ((x).f_magic != THUMBPEMAGIC)) 97 98#define FILHDR struct external_filehdr 99#define FILHSZ 20 100 101 102/********************** AOUT "OPTIONAL HEADER" **********************/ 103 104 105typedef struct 106{ 107 char magic[2]; /* type of file */ 108 char vstamp[2]; /* version stamp */ 109 char tsize[4]; /* text size in bytes, padded to FW bdry*/ 110 char dsize[4]; /* initialized data " " */ 111 char bsize[4]; /* uninitialized data " " */ 112 char entry[4]; /* entry pt. */ 113 char text_start[4]; /* base of text used for this file */ 114 char data_start[4]; /* base of data used for this file */ 115} 116AOUTHDR; 117 118 119#define AOUTSZ 28 120#define AOUTHDRSZ 28 121 122#define OMAGIC 0404 /* object files, eg as output */ 123#define ZMAGIC 0413 /* demand load format, eg normal ld output */ 124#define STMAGIC 0401 /* target shlib */ 125#define SHMAGIC 0443 /* host shlib */ 126 127 128/* define some NT default values */ 129/* #define NT_IMAGE_BASE 0x400000 moved to internal.h */ 130#define NT_SECTION_ALIGNMENT 0x1000 131#define NT_FILE_ALIGNMENT 0x200 132#define NT_DEF_RESERVE 0x100000 133#define NT_DEF_COMMIT 0x1000 134 135/********************** SECTION HEADER **********************/ 136struct external_scnhdr 137{ 138 char s_name[8]; /* section name */ 139 char s_paddr[4]; /* physical address, aliased s_nlib */ 140 char s_vaddr[4]; /* virtual address */ 141 char s_size[4]; /* section size */ 142 char s_scnptr[4]; /* file ptr to raw data for section */ 143 char s_relptr[4]; /* file ptr to relocation */ 144 char s_lnnoptr[4]; /* file ptr to line numbers */ 145 char s_nreloc[2]; /* number of relocation entries */ 146 char s_nlnno[2]; /* number of line number entries*/ 147 char s_flags[4]; /* flags */ 148}; 149 150#define SCNHDR struct external_scnhdr 151#define SCNHSZ 40 152 153/* 154 * names of "special" sections 155 */ 156#define _TEXT ".text" 157#define _DATA ".data" 158#define _BSS ".bss" 159#define _COMMENT ".comment" 160#define _LIB ".lib" 161 162/* We use the .rdata section to hold read only data. */ 163#define _LIT ".rdata" 164 165/********************** LINE NUMBERS **********************/ 166 167/* 1 line number entry for every "breakpointable" source line in a section. 168 * Line numbers are grouped on a per function basis; first entry in a function 169 * grouping will have l_lnno = 0 and in place of physical address will be the 170 * symbol table index of the function name. 171 */ 172struct external_lineno 173{ 174 union 175 { 176 char l_symndx[4]; /* function name symbol index, iff l_lnno == 0*/ 177 char l_paddr[4]; /* (physical) address of line number */ 178 } l_addr; 179 char l_lnno[2]; /* line number */ 180}; 181 182 183#define LINENO struct external_lineno 184#define LINESZ 6 185 186 187/********************** SYMBOLS **********************/ 188 189#define E_SYMNMLEN 8 /* # characters in a symbol name */ 190#define E_FILNMLEN 14 /* # characters in a file name */ 191#define E_DIMNUM 4 /* # array dimensions in auxiliary entry */ 192 193struct external_syment 194{ 195 union 196 { 197 char e_name[E_SYMNMLEN]; 198 struct 199 { 200 char e_zeroes[4]; 201 char e_offset[4]; 202 } e; 203 } e; 204 char e_value[4]; 205 char e_scnum[2]; 206 char e_type[2]; 207 char e_sclass[1]; 208 char e_numaux[1]; 209}; 210 211#define N_BTMASK (0xf) 212#define N_TMASK (0x30) 213#define N_BTSHFT (4) 214#define N_TSHIFT (2) 215 216union external_auxent 217{ 218 struct 219 { 220 char x_tagndx[4]; /* str, un, or enum tag indx */ 221 union 222 { 223 struct 224 { 225 char x_lnno[2]; /* declaration line number */ 226 char x_size[2]; /* str/union/array size */ 227 } x_lnsz; 228 char x_fsize[4]; /* size of function */ 229 } x_misc; 230 union 231 { 232 struct /* if ISFCN, tag, or .bb */ 233 { 234 char x_lnnoptr[4]; /* ptr to fcn line # */ 235 char x_endndx[4]; /* entry ndx past block end */ 236 } x_fcn; 237 struct /* if ISARY, up to 4 dimen. */ 238 { 239 char x_dimen[E_DIMNUM][2]; 240 } x_ary; 241 } x_fcnary; 242 char x_tvndx[2]; /* tv index */ 243 } x_sym; 244 245 union 246 { 247 char x_fname[E_FILNMLEN]; 248 struct 249 { 250 char x_zeroes[4]; 251 char x_offset[4]; 252 } x_n; 253 } x_file; 254 255 struct 256 { 257 char x_scnlen[4]; /* section length */ 258 char x_nreloc[2]; /* # relocation entries */ 259 char x_nlinno[2]; /* # line numbers */ 260 char x_checksum[4]; /* section COMDAT checksum */ 261 char x_associated[2]; /* COMDAT associated section index */ 262 char x_comdat[1]; /* COMDAT selection number */ 263 } x_scn; 264 265 struct 266 { 267 char x_tvfill[4]; /* tv fill value */ 268 char x_tvlen[2]; /* length of .tv */ 269 char x_tvran[2][2]; /* tv range */ 270 } x_tv; /* info about .tv section (in auxent of symbol .tv)) */ 271}; 272 273#define SYMENT struct external_syment 274#define SYMESZ 18 275#define AUXENT union external_auxent 276#define AUXESZ 18 277 278#define _ETEXT "etext" 279 280/********************** RELOCATION DIRECTIVES **********************/ 281#ifdef ARM_WINCE 282struct external_reloc 283{ 284 char r_vaddr[4]; 285 char r_symndx[4]; 286 char r_type[2]; 287}; 288 289#define RELOC struct external_reloc 290#define RELSZ 10 291 292#else 293struct external_reloc 294{ 295 char r_vaddr[4]; 296 char r_symndx[4]; 297 char r_type[2]; 298 char r_offset[4]; 299}; 300 301#define RELOC struct external_reloc 302#define RELSZ 14 303#endif 304