i386.h revision 33965
1/*** coff information for Intel 386/486. */ 2 3 4/********************** FILE HEADER **********************/ 5 6struct external_filehdr { 7 char f_magic[2]; /* magic number */ 8 char f_nscns[2]; /* number of sections */ 9 char f_timdat[4]; /* time & date stamp */ 10 char f_symptr[4]; /* file pointer to symtab */ 11 char f_nsyms[4]; /* number of symtab entries */ 12 char f_opthdr[2]; /* sizeof(optional hdr) */ 13 char f_flags[2]; /* flags */ 14}; 15 16/* Bits for f_flags: 17 * F_RELFLG relocation info stripped from file 18 * F_EXEC file is executable (no unresolved external references) 19 * F_LNNO line numbers stripped from file 20 * F_LSYMS local symbols stripped from file 21 * F_AR32WR file has byte ordering of an AR32WR machine (e.g. vax) 22 */ 23 24#define F_RELFLG (0x0001) 25#define F_EXEC (0x0002) 26#define F_LNNO (0x0004) 27#define F_LSYMS (0x0008) 28 29 30 31#define I386MAGIC 0x14c 32#define I386PTXMAGIC 0x154 33#define I386AIXMAGIC 0x175 34 35/* This is Lynx's all-platform magic number for executables. */ 36 37#define LYNXCOFFMAGIC 0415 38 39#define I386BADMAG(x) (((x).f_magic != I386MAGIC) \ 40 && (x).f_magic != I386AIXMAGIC \ 41 && (x).f_magic != I386PTXMAGIC \ 42 && (x).f_magic != LYNXCOFFMAGIC) 43 44#define FILHDR struct external_filehdr 45#define FILHSZ 20 46 47 48/********************** AOUT "OPTIONAL HEADER" **********************/ 49 50 51typedef struct 52{ 53 char magic[2]; /* type of file */ 54 char vstamp[2]; /* version stamp */ 55 char tsize[4]; /* text size in bytes, padded to FW bdry*/ 56 char dsize[4]; /* initialized data " " */ 57 char bsize[4]; /* uninitialized data " " */ 58 char entry[4]; /* entry pt. */ 59 char text_start[4]; /* base of text used for this file */ 60 char data_start[4]; /* base of data used for this file */ 61 62 63} 64AOUTHDR; 65 66 67#define AOUTSZ 28 68#define AOUTHDRSZ 28 69 70#define OMAGIC 0404 /* object files, eg as output */ 71#define ZMAGIC 0413 /* demand load format, eg normal ld output */ 72#define STMAGIC 0401 /* target shlib */ 73#define SHMAGIC 0443 /* host shlib */ 74 75 76/* define some NT default values */ 77/* #define NT_IMAGE_BASE 0x400000 moved to internal.h */ 78#define NT_SECTION_ALIGNMENT 0x1000 79#define NT_FILE_ALIGNMENT 0x200 80#define NT_DEF_RESERVE 0x100000 81#define NT_DEF_COMMIT 0x1000 82 83/********************** SECTION HEADER **********************/ 84 85 86struct external_scnhdr { 87 char s_name[8]; /* section name */ 88 char s_paddr[4]; /* physical address, aliased s_nlib */ 89 char s_vaddr[4]; /* virtual address */ 90 char s_size[4]; /* section size */ 91 char s_scnptr[4]; /* file ptr to raw data for section */ 92 char s_relptr[4]; /* file ptr to relocation */ 93 char s_lnnoptr[4]; /* file ptr to line numbers */ 94 char s_nreloc[2]; /* number of relocation entries */ 95 char s_nlnno[2]; /* number of line number entries*/ 96 char s_flags[4]; /* flags */ 97}; 98 99#define SCNHDR struct external_scnhdr 100#define SCNHSZ 40 101 102/* 103 * names of "special" sections 104 */ 105#define _TEXT ".text" 106#define _DATA ".data" 107#define _BSS ".bss" 108#define _COMMENT ".comment" 109#define _LIB ".lib" 110 111/********************** LINE NUMBERS **********************/ 112 113/* 1 line number entry for every "breakpointable" source line in a section. 114 * Line numbers are grouped on a per function basis; first entry in a function 115 * grouping will have l_lnno = 0 and in place of physical address will be the 116 * symbol table index of the function name. 117 */ 118struct external_lineno { 119 union { 120 char l_symndx[4]; /* function name symbol index, iff l_lnno == 0*/ 121 char l_paddr[4]; /* (physical) address of line number */ 122 } l_addr; 123 char l_lnno[2]; /* line number */ 124}; 125 126 127#define LINENO struct external_lineno 128#define LINESZ 6 129 130 131/********************** SYMBOLS **********************/ 132 133#define E_SYMNMLEN 8 /* # characters in a symbol name */ 134#define E_FILNMLEN 14 /* # characters in a file name */ 135#define E_DIMNUM 4 /* # array dimensions in auxiliary entry */ 136 137struct external_syment 138{ 139 union { 140 char e_name[E_SYMNMLEN]; 141 struct { 142 char e_zeroes[4]; 143 char e_offset[4]; 144 } e; 145 } e; 146 char e_value[4]; 147 char e_scnum[2]; 148 char e_type[2]; 149 char e_sclass[1]; 150 char e_numaux[1]; 151}; 152 153#define N_BTMASK (0xf) 154#define N_TMASK (0x30) 155#define N_BTSHFT (4) 156#define N_TSHIFT (2) 157 158union 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 struct { 198 char x_tvfill[4]; /* tv fill value */ 199 char x_tvlen[2]; /* length of .tv */ 200 char x_tvran[2][2]; /* tv range */ 201 } x_tv; /* info about .tv section (in auxent of symbol .tv)) */ 202 203 204}; 205 206#define SYMENT struct external_syment 207#define SYMESZ 18 208#define AUXENT union external_auxent 209#define AUXESZ 18 210 211 212# define _ETEXT "etext" 213 214 215/********************** RELOCATION DIRECTIVES **********************/ 216 217 218 219struct external_reloc { 220 char r_vaddr[4]; 221 char r_symndx[4]; 222 char r_type[2]; 223}; 224 225 226#define RELOC struct external_reloc 227#define RELSZ 10 228 229