1 /* Basic coff information for the PowerPC 2 Based on coff/rs6000.h, coff/i386.h and others. 3 4 Copyright 2001 Free Software Foundation, Inc. 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 18 Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. 19 20 Initial release: Kim Knuttila (krk@cygnus.com) */ 21 22 /********************** FILE HEADER **********************/ 23 24 struct external_filehdr { 25 char f_magic[2]; /* magic number */ 26 char f_nscns[2]; /* number of sections */ 27 char f_timdat[4]; /* time & date stamp */ 28 char f_symptr[4]; /* file pointer to symtab */ 29 char f_nsyms[4]; /* number of symtab entries */ 30 char f_opthdr[2]; /* sizeof(optional hdr) */ 31 char f_flags[2]; /* flags */ 32 }; 33 34 #define FILHDR struct external_filehdr 35 #define FILHSZ 20 36 37 /* Bits for f_flags: 38 * F_RELFLG relocation info stripped from file 39 * F_EXEC file is executable (no unresolved external references) 40 * F_LNNO line numbers stripped from file 41 * F_LSYMS local symbols stripped from file 42 * F_AR32WR file has byte ordering of an AR32WR machine (e.g. vax) 43 */ 44 45 #define F_RELFLG (0x0001) 46 #define F_EXEC (0x0002) 47 #define F_LNNO (0x0004) 48 #define F_LSYMS (0x0008) 49 50 /* extra NT defines */ 51 #define PPCMAGIC 0760 /* peeked on aa PowerPC Windows NT box */ 52 #define DOSMAGIC 0x5a4d /* from arm.h, i386.h */ 53 #define NT_SIGNATURE 0x00004550 /* from arm.h, i386.h */ 54 55 /* from winnt.h */ 56 #define IMAGE_NT_OPTIONAL_HDR_MAGIC 0x10b 57 58 #define PPCBADMAG(x) ((x).f_magic != PPCMAGIC) 59 60 /********************** AOUT "OPTIONAL HEADER" **********************/ 61 62 typedef struct 63 { 64 char magic[2]; /* type of file */ 65 char vstamp[2]; /* version stamp */ 66 char tsize[4]; /* text size in bytes, padded to FW bdry*/ 67 char dsize[4]; /* initialized data " " */ 68 char bsize[4]; /* uninitialized data " " */ 69 char entry[4]; /* entry pt. */ 70 char text_start[4]; /* base of text used for this file */ 71 char data_start[4]; /* base of data used for this file */ 72 } 73 AOUTHDR; 74 75 #define AOUTSZ 28 76 #define AOUTHDRSZ 28 77 78 /********************** SECTION HEADER **********************/ 79 80 struct external_scnhdr { 81 char s_name[8]; /* section name */ 82 char s_paddr[4]; /* physical address, aliased s_nlib */ 83 char s_vaddr[4]; /* virtual address */ 84 char s_size[4]; /* section size */ 85 char s_scnptr[4]; /* file ptr to raw data for section */ 86 char s_relptr[4]; /* file ptr to relocation */ 87 char s_lnnoptr[4]; /* file ptr to line numbers */ 88 char s_nreloc[2]; /* number of relocation entries */ 89 char s_nlnno[2]; /* number of line number entries */ 90 char s_flags[4]; /* flags */ 91 }; 92 93 #define SCNHDR struct external_scnhdr 94 #define SCNHSZ 40 95 96 /* 97 * names of "special" sections 98 */ 99 #define _TEXT ".text" 100 #define _DATA ".data" 101 #define _BSS ".bss" 102 #define _COMMENT ".comment" 103 #define _LIB ".lib" 104 105 /********************** LINE NUMBERS **********************/ 106 107 /* 1 line number entry for every "breakpointable" source line in a section. 108 * Line numbers are grouped on a per function basis; first entry in a function 109 * grouping will have l_lnno = 0 and in place of physical address will be the 110 * symbol table index of the function name. 111 */ 112 struct external_lineno { 113 union { 114 char l_symndx[4]; /* function name symbol index, iff l_lnno == 0 */ 115 char l_paddr[4]; /* (physical) address of line number */ 116 } l_addr; 117 char l_lnno[2]; /* line number */ 118 }; 119 120 #define LINENO struct external_lineno 121 #define LINESZ 6 122 123 /********************** SYMBOLS **********************/ 124 125 #define E_SYMNMLEN 8 /* # characters in a symbol name */ 126 127 /* Allow the file name length to be overridden in the including file */ 128 #ifndef E_FILNMLEN 129 #define E_FILNMLEN 14 130 #endif 131 132 #define E_DIMNUM 4 /* # array dimensions in auxiliary entry */ 133 134 struct external_syment 135 { 136 union { 137 char e_name[E_SYMNMLEN]; 138 struct { 139 char e_zeroes[4]; 140 char e_offset[4]; 141 } e; 142 } e; 143 char e_value[4]; 144 char e_scnum[2]; 145 char e_type[2]; 146 char e_sclass[1]; 147 char e_numaux[1]; 148 }; 149 150 #define SYMENT struct external_syment 151 #define SYMESZ 18 152 153 #define N_BTMASK (0xf) 154 #define N_TMASK (0x30) 155 #define N_BTSHFT (4) 156 #define N_TSHIFT (2) 157 158 union external_auxent { 159 struct { 160 char x_tagndx[4]; /* str, un, or enum tag indx */ 161 union { 162 struct { 163 char x_lnno[2]; /* declaration line number */ 164 char x_size[2]; /* str/union/array size */ 165 } x_lnsz; 166 char x_fsize[4]; /* size of function */ 167 } x_misc; 168 union { 169 struct { /* if ISFCN, tag, or .bb */ 170 char x_lnnoptr[4]; /* ptr to fcn line # */ 171 char x_endndx[4]; /* entry ndx past block end */ 172 } x_fcn; 173 struct { /* if ISARY, up to 4 dimen. */ 174 char x_dimen[E_DIMNUM][2]; 175 } x_ary; 176 } x_fcnary; 177 char x_tvndx[2]; /* tv index */ 178 } x_sym; 179 180 union { 181 char x_fname[E_FILNMLEN]; 182 struct { 183 char x_zeroes[4]; 184 char x_offset[4]; 185 } x_n; 186 } x_file; 187 188 struct { 189 char x_scnlen[4]; /* section length */ 190 char x_nreloc[2]; /* # relocation entries */ 191 char x_nlinno[2]; /* # line numbers */ 192 char x_checksum[4]; /* section COMDAT checksum */ 193 char x_associated[2]; /* COMDAT associated section index */ 194 char x_comdat[1]; /* COMDAT selection number */ 195 } x_scn; 196 }; 197 198 #define AUXENT union external_auxent 199 #define AUXESZ 18 200 201 #define _ETEXT "etext" 202 203 /********************** RELOCATION DIRECTIVES **********************/ 204 205 struct external_reloc { 206 char r_vaddr[4]; 207 char r_symndx[4]; 208 char r_type[2]; 209 }; 210 211 #define RELOC struct external_reloc 212 #define RELSZ 10 213 214