include/coff/i386.h

   1 /*** coff information for Intel 386/486.  */
   2
   3
   4 /********************** FILE HEADER **********************/
   5
   6 struct 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
  51 typedef 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 }
  64 AOUTHDR;
  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
  86 struct 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  */
 118 struct 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
 137 struct 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
 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         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
 219 struct 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