include/coff/apollo.h

   1 /*** coff information for Apollo M68K */
   2
   3 /********************** FILE HEADER **********************/
   4
   5 struct external_filehdr {
   6         char f_magic[2];        /* magic number                 */
   7         char f_nscns[2];        /* number of sections           */
   8         char f_timdat[4];       /* time & date stamp            */
   9         char f_symptr[4];       /* file pointer to symtab       */
  10         char f_nsyms[4];        /* number of symtab entries     */
  11         char f_opthdr[2];       /* sizeof(optional hdr)         */
  12         char f_flags[2];        /* flags                        */
  13 };
  14
  15
  16 /* Motorola 68000/68008/68010/68020 */
  17 #define MC68MAGIC       0520
  18 #define MC68KWRMAGIC    0520    /* writeable text segments */
  19 #define MC68TVMAGIC     0521
  20 #define MC68KROMAGIC    0521    /* readonly shareable text segments */
  21 #define MC68KPGMAGIC    0522    /* demand paged text segments */
  22 #define M68MAGIC        0210
  23 #define M68TVMAGIC      0211
  24
  25 /* Apollo 68000-based machines have a different magic number. This comes
  26  * from /usr/include/apollo/filehdr.h
  27  */
  28 #define APOLLOM68KMAGIC 0627
  29
  30 #define OMAGIC M68MAGIC
  31 #define M68KBADMAG(x) (((x).f_magic!=MC68MAGIC) && ((x).f_magic!=MC68KWRMAGIC) && ((x).f_magic!=MC68TVMAGIC) && \
  32   ((x).f_magic!=MC68KROMAGIC) && ((x).f_magic!=MC68KPGMAGIC) && ((x).f_magic!=M68MAGIC) && ((x).f_magic!=M68TVMAGIC)  && \
  33   ((x).f_magic!=APOLLOM68KMAGIC) )
  34
  35
  36 #define FILHDR  struct external_filehdr
  37 #define FILHSZ  20
  38
  39
  40 /********************** AOUT "OPTIONAL HEADER" **********************/
  41
  42 typedef struct
  43 {
  44   char  magic[2];               /* type of file                         */
  45   char  vstamp[2];              /* version stamp                        */
  46   char  tsize[4];               /* text size in bytes, padded to FW bdry*/
  47   char  dsize[4];               /* initialized data "  "                */
  48   char  bsize[4];               /* uninitialized data "   "             */
  49   char  entry[4];               /* entry pt.                            */
  50   char  text_start[4];          /* base of text used for this file */
  51   char  data_start[4];          /* base of data used for this file */
  52   char  o_sri[4];               /* Apollo specific - .sri data pointer */
  53   char  o_inlib[4];             /* Apollo specific - .inlib data pointer */
  54   char  vid[8];                 /* Apollo specific - 64 bit version ID */
  55 }
  56 AOUTHDR;
  57
  58 #define APOLLO_COFF_VERSION_NUMBER 1 /* the value of the aouthdr magic */
  59 #define AOUTHDRSZ 44
  60 #define AOUTSZ 44
  61
  62
  63
  64 /********************** SECTION HEADER **********************/
  65
  66 struct external_scnhdr {
  67         /* Apollo allow for larger section names by  allowing it to be in
  68          * the string table.
  69          */
  70         char            s_name[8];
  71         char            s_paddr[4];     /* physical address, aliased s_nlib */
  72         char            s_vaddr[4];     /* virtual address              */
  73         char            s_size[4];      /* section size                 */
  74         char            s_scnptr[4];    /* file ptr to raw data for section */
  75         char            s_relptr[4];    /* file ptr to relocation       */
  76         char            s_lnnoptr[4];   /* file ptr to line numbers     */
  77         char            s_nreloc[2];    /* number of relocation entries */
  78         char            s_nlnno[2];     /* number of line number entries*/
  79         char            s_flags[4];     /* flags                        */
  80 };
  81
  82 /* If s_zeores is all zeroes, s_offset gives the real location of the name
  83  * in the string table.
  84  */
  85
  86 #define s_zeroes section_name.s_name
  87 #define s_offset (section_name.s_name+4)
  88
  89 /*
  90  * names of "special" sections
  91  */
  92 #define _TEXT   ".text"
  93 #define _DATA   ".data"
  94 #define _BSS    ".bss"
  95 #define _TV     ".tv"
  96 #define _INIT   ".init"
  97 #define _FINI   ".fini"
  98 #define _LINES  ".lines"
  99 #define _BLOCKS ".blocks"
 100 #define _SRI    ".sri"                  /* Static Resource Information (systype,
 101  et al.) */
 102 #define _MIR    ".mir"                  /* Module Information Records  */
 103 #define _APTV   ".aptv"                 /* Apollo-style transfer vectors. */
 104 #define _INLIB  ".inlib"                /* Shared Library information */
 105 #define _RWDI   ".rwdi"         /* Read/write data initialization directives for
 106  compressed sections */
 107 #define _UNWIND ".unwind"               /* Stack unwind information */
 108
 109 #define SCNHDR  struct external_scnhdr
 110 #define SCNHSZ  40
 111
 112
 113 /********************** LINE NUMBERS **********************/
 114
 115 /* 1 line number entry for every "breakpointable" source line in a section.
 116  * Line numbers are grouped on a per function basis; first entry in a function
 117  * grouping will have l_lnno = 0 and in place of physical address will be the
 118  * symbol table index of the function name.
 119  */
 120 struct external_lineno {
 121         union {
 122                 char l_symndx[4];       /* function name symbol index, iff l_lnno == 0*/
 123                 char l_paddr[4];        /* (physical) address of line number    */
 124         } l_addr;
 125         char l_lnno[2]; /* line number          */
 126 };
 127
 128
 129 #define LINENO  struct external_lineno
 130 #define LINESZ  6
 131
 132
 133 /********************** SYMBOLS **********************/
 134
 135 #define E_SYMNMLEN      8       /* # characters in a symbol name        */
 136 #define E_FILNMLEN      14      /* # characters in a file name          */
 137 #define E_DIMNUM        4       /* # array dimensions in auxiliary entry */
 138
 139 struct external_syment
 140 {
 141   union {
 142     char e_name[E_SYMNMLEN];
 143     struct {
 144       char e_zeroes[4];
 145       char e_offset[4];
 146     } e;
 147   } e;
 148   char e_value[4];
 149   char e_scnum[2];
 150   char e_type[2];
 151   char e_sclass[1];
 152   char e_numaux[1];
 153 };
 154
 155
 156
 157 #define N_BTMASK        (017)
 158 #define N_TMASK         (060)
 159 #define N_BTSHFT        (4)
 160 #define N_TSHIFT        (2)
 161
 162
 163 union external_auxent {
 164         struct {
 165                 char x_tagndx[4];       /* str, un, or enum tag indx */
 166                 union {
 167                         struct {
 168                             char  x_lnno[2]; /* declaration line number */
 169                             char  x_size[2]; /* str/union/array size */
 170                         } x_lnsz;
 171                         char x_fsize[4];        /* size of function */
 172                 } x_misc;
 173                 union {
 174                         struct {                /* if ISFCN, tag, or .bb */
 175                             char x_lnnoptr[4];  /* ptr to fcn line # */
 176                             char x_endndx[4];   /* entry ndx past block end */
 177                         } x_fcn;
 178                         struct {                /* if ISARY, up to 4 dimen. */
 179                             char x_dimen[E_DIMNUM][2];
 180                         } x_ary;
 181                 } x_fcnary;
 182                 char x_tvndx[2];                /* tv index */
 183         } x_sym;
 184
 185         union {
 186                 char x_fname[E_FILNMLEN];
 187                 struct {
 188                         char x_zeroes[4];
 189                         char x_offset[4];
 190                 } x_n;
 191         } x_file;
 192
 193         struct {
 194                 char x_scnlen[4];                       /* section length */
 195                 char x_nreloc[2];       /* # relocation entries */
 196                 char x_nlinno[2];       /* # line numbers */
 197         } x_scn;
 198
 199         struct {
 200                 char x_tvfill[4];       /* tv fill value */
 201                 char x_tvlen[2];        /* length of .tv */
 202                 char x_tvran[2][2];     /* tv range */
 203         } x_tv;         /* info about .tv section (in auxent of symbol .tv)) */
 204
 205
 206 };
 207
 208 #define SYMENT  struct external_syment
 209 #define SYMESZ  18
 210 #define AUXENT  union external_auxent
 211 #define AUXESZ  18
 212
 213
 214
 215 /********************** RELOCATION DIRECTIVES **********************/
 216
 217
 218 struct external_reloc {
 219   char r_vaddr[4];
 220   char r_symndx[4];
 221   char r_type[2];
 222 #ifdef M68K_COFF_OFFSET
 223   char r_offset[4];
 224 #endif
 225
 226 };
 227
 228
 229 #define RELOC struct external_reloc
 230
 231 #ifdef M68K_COFF_OFFSET
 232 #define RELSZ 14
 233 #else
 234 #define RELSZ 10
 235 #endif
 236
 237 /* Apollo specific STYP flags */
 238
 239 #define STYP_RELOCATED_NOT_LOADED 0x00010000    /* Section is relocated normally during linking, but need
 240                                                    not be loaded during program execution */
 241 #define STYP_DEBUG              0x00020000      /* debug section */
 242 #define STYP_OVERLAY            0x00040000      /* Section is overlayed */
 243 #define STYP_INSTRUCTION        0x00200000      /* Section contains executable code */
 244
 245 #define STYP_ZERO               0x00800000      /* Section is initialized to zero */
 246 #define STYP_INSTALLED          0x02000000      /* Section should be installable in KGT */
 247 #define STYP_LOOK_INSTALLED     0x04000000      /* Look for section in KGT */
 248 #define STYP_SECALIGN1          0x08000000      /* Specially aligned section */
 249 #define STYP_SECALIGN2          0x10000000      /*      "       "       "    */
 250 #define STYP_COMPRESSED         0x20000000      /* No section data per se (s_scnptr = 0), but there are
 251                                                    initialization directives for it in .rwdi section
 252                                                    (used in conjunction with STYP_BSS) */