include/coff-m68k.h

   1 /*** coff information for 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 #define M68KBADMAG(x) (((x).f_magic!=MC68MAGIC) && ((x).f_magic!=MC68KWRMAGIC) && ((x).f_magic!=MC68TVMAGIC) && \
  26   ((x).f_magic!=MC68KROMAGIC) && ((x).f_magic!=MC68KPGMAGIC) && ((x).f_magic!=M68MAGIC) && ((x).f_magic!=M68TVMAGIC) )
  27
  28
  29
  30 #define FILHDR  struct external_filehdr
  31 #define FILHSZ  sizeof(FILHDR)
  32
  33
  34 /********************** AOUT "OPTIONAL HEADER" **********************/
  35
  36
  37 typedef struct
  38 {
  39   char  magic[2];               /* type of file                         */
  40   char  vstamp[2];              /* version stamp                        */
  41   char  tsize[4];               /* text size in bytes, padded to FW bdry*/
  42   char  dsize[4];               /* initialized data "  "                */
  43   char  bsize[4];               /* uninitialized data "   "             */
  44   char  entry[4];               /* entry pt.                            */
  45   char  text_start[4];          /* base of text used for this file */
  46   char  data_start[4];          /* base of data used for this file */
  47 }
  48 AOUTHDR;
  49
  50 #define AOUTSZ (sizeof(AOUTHDR))
  51
  52
  53
  54 /********************** SECTION HEADER **********************/
  55
  56
  57 struct external_scnhdr {
  58         char            s_name[8];      /* section name                 */
  59         char            s_paddr[4];     /* physical address, aliased s_nlib */
  60         char            s_vaddr[4];     /* virtual address              */
  61         char            s_size[4];      /* section size                 */
  62         char            s_scnptr[4];    /* file ptr to raw data for section */
  63         char            s_relptr[4];    /* file ptr to relocation       */
  64         char            s_lnnoptr[4];   /* file ptr to line numbers     */
  65         char            s_nreloc[2];    /* number of relocation entries */
  66         char            s_nlnno[2];     /* number of line number entries*/
  67         char            s_flags[4];     /* flags                        */
  68 };
  69
  70 /*
  71  * names of "special" sections
  72  */
  73 #define _TEXT   ".text"
  74 #define _DATA   ".data"
  75 #define _BSS    ".bss"
  76
  77
  78 #define SCNHDR  struct external_scnhdr
  79 #define SCNHSZ  sizeof(SCNHDR)
  80
  81
  82 /********************** LINE NUMBERS **********************/
  83
  84 /* 1 line number entry for every "breakpointable" source line in a section.
  85  * Line numbers are grouped on a per function basis; first entry in a function
  86  * grouping will have l_lnno = 0 and in place of physical address will be the
  87  * symbol table index of the function name.
  88  */
  89 struct external_lineno {
  90         union {
  91                 char l_symndx[4];       /* function name symbol index, iff l_lnno == 0*/
  92                 char l_paddr[4];        /* (physical) address of line number    */
  93         } l_addr;
  94         char l_lnno[2]; /* line number          */
  95 };
  96
  97
  98 #define LINENO  struct external_lineno
  99 #define LINESZ  sizeof(LINENO)
 100
 101
 102 /********************** SYMBOLS **********************/
 103
 104 #define E_SYMNMLEN      8       /* # characters in a symbol name        */
 105 #define E_FILNMLEN      14      /* # characters in a file name          */
 106 #define E_DIMNUM        4       /* # array dimensions in auxiliary entry */
 107
 108 struct external_syment
 109 {
 110   union {
 111     char e_name[E_SYMNMLEN];
 112     struct {
 113       char e_zeroes[4];
 114       char e_offset[4];
 115     } e;
 116   } e;
 117   char e_value[4];
 118   char e_scnum[2];
 119   char e_type[2];
 120   char e_sclass[1];
 121   char e_numaux[1];
 122 };
 123
 124
 125
 126 #define N_BTMASK        (017)
 127 #define N_TMASK         (060)
 128 #define N_BTSHFT        (4)
 129 #define N_TSHIFT        (2)
 130
 131
 132 union external_auxent {
 133         struct {
 134                 char x_tagndx[4];       /* str, un, or enum tag indx */
 135                 union {
 136                         struct {
 137                             char  x_lnno[2]; /* declaration line number */
 138                             char  x_size[2]; /* str/union/array size */
 139                         } x_lnsz;
 140                         char x_fsize[4];        /* size of function */
 141                 } x_misc;
 142                 union {
 143                         struct {                /* if ISFCN, tag, or .bb */
 144                             char x_lnnoptr[4];  /* ptr to fcn line # */
 145                             char x_endndx[4];   /* entry ndx past block end */
 146                         } x_fcn;
 147                         struct {                /* if ISARY, up to 4 dimen. */
 148                             char x_dimen[E_DIMNUM][2];
 149                         } x_ary;
 150                 } x_fcnary;
 151                 char x_tvndx[2];                /* tv index */
 152         } x_sym;
 153
 154         union {
 155                 char x_fname[E_FILNMLEN];
 156                 struct {
 157                         char x_zeroes[4];
 158                         char x_offset[4];
 159                 } x_n;
 160         } x_file;
 161
 162         struct {
 163                 char x_scnlen[4];                       /* section length */
 164                 char x_nreloc[2];       /* # relocation entries */
 165                 char x_nlinno[2];       /* # line numbers */
 166         } x_scn;
 167
 168         struct {
 169                 char x_tvfill[4];       /* tv fill value */
 170                 char x_tvlen[2];        /* length of .tv */
 171                 char x_tvran[2][2];     /* tv range */
 172         } x_tv;         /* info about .tv section (in auxent of symbol .tv)) */
 173
 174
 175 };
 176
 177 #define SYMENT  struct external_syment
 178 #define SYMESZ  18
 179 #define AUXENT  union external_auxent
 180 #define AUXESZ  18
 181
 182
 183
 184 /********************** RELOCATION DIRECTIVES **********************/
 185
 186
 187 struct external_reloc {
 188   char r_vaddr[4];
 189   char r_symndx[4];
 190   char r_type[2];
 191 };
 192
 193
 194 #define RELOC struct external_reloc
 195 #define RELSZ 10
 196
 197 #define DEFAULT_DATA_SECTION_ALIGNMENT 4
 198 #define DEFAULT_BSS_SECTION_ALIGNMENT 4
 199 #define DEFAULT_TEXT_SECTION_ALIGNMENT 4
 200 /* For new sections we havn't heard of before */
 201 #define DEFAULT_SECTION_ALIGNMENT 4