include/coff/m68k.h

   1 /*** coff information for M68K */
   2
   3 #ifndef GNU_COFF_M68K_H
   4 #define GNU_COFF_M68K_H 1
   5
   6 /********************** FILE HEADER **********************/
   7
   8 struct external_filehdr {
   9         char f_magic[2];        /* magic number                 */
  10         char f_nscns[2];        /* number of sections           */
  11         char f_timdat[4];       /* time & date stamp            */
  12         char f_symptr[4];       /* file pointer to symtab       */
  13         char f_nsyms[4];        /* number of symtab entries     */
  14         char f_opthdr[2];       /* sizeof(optional hdr)         */
  15         char f_flags[2];        /* flags                        */
  16 };
  17
  18
  19 /* Motorola 68000/68008/68010/68020 */
  20 #define MC68MAGIC       0520
  21 #define MC68KWRMAGIC    0520    /* writeable text segments */
  22 #define MC68TVMAGIC     0521
  23 #define MC68KROMAGIC    0521    /* readonly shareable text segments */
  24 #define MC68KPGMAGIC    0522    /* demand paged text segments */
  25 #define M68MAGIC        0210
  26 #define M68TVMAGIC      0211
  27
  28 /* this is the magic of the Bull dpx/2 */
  29 #define MC68KBCSMAGIC   0526
  30
  31 /* This is Lynx's all-platform magic number for executables. */
  32
  33 #define LYNXCOFFMAGIC   0415
  34
  35 #define OMAGIC M68MAGIC
  36
  37 /* This intentionally does not include MC68KBCSMAGIC; it only includes
  38    magic numbers which imply that names do not have underscores.  */
  39 #define M68KBADMAG(x) (((x).f_magic!=MC68MAGIC) && ((x).f_magic!=MC68KWRMAGIC) && ((x).f_magic!=MC68TVMAGIC) && \
  40   ((x).f_magic!=MC68KROMAGIC) && ((x).f_magic!=MC68KPGMAGIC) && ((x).f_magic!=M68MAGIC) && ((x).f_magic!=M68TVMAGIC) && ((x).f_magic!=LYNXCOFFMAGIC) )
  41
  42 /* Magic numbers for the a.out header.  */
  43
  44 #define PAGEMAGICEXECSWAPPED  0407 /* executable (swapped) */
  45 #define PAGEMAGICPEXECSWAPPED 0410 /* pure executable (swapped) */
  46 #define PAGEMAGICPEXECTSHLIB  0443 /* pure executable (target shared library) */
  47 #define PAGEMAGICPEXECPAGED   0413 /* pure executable (paged) */
  48
  49 #define FILHDR  struct external_filehdr
  50 #define FILHSZ  20
  51
  52
  53 /********************** AOUT "OPTIONAL HEADER" **********************/
  54
  55
  56 typedef struct
  57 {
  58   char  magic[2];               /* type of file                         */
  59   char  vstamp[2];              /* version stamp                        */
  60   char  tsize[4];               /* text size in bytes, padded to FW bdry*/
  61   char  dsize[4];               /* initialized data "  "                */
  62   char  bsize[4];               /* uninitialized data "   "             */
  63   char  entry[4];               /* entry pt.                            */
  64   char  text_start[4];          /* base of text used for this file */
  65   char  data_start[4];          /* base of data used for this file */
  66 }
  67 AOUTHDR;
  68
  69 #define AOUTSZ 28
  70 #define AOUTHDRSZ 28
  71
  72
  73 /********************** SECTION HEADER **********************/
  74
  75
  76 struct external_scnhdr {
  77         char            s_name[8];      /* section name                 */
  78         char            s_paddr[4];     /* physical address, aliased s_nlib */
  79         char            s_vaddr[4];     /* virtual address              */
  80         char            s_size[4];      /* section size                 */
  81         char            s_scnptr[4];    /* file ptr to raw data for section */
  82         char            s_relptr[4];    /* file ptr to relocation       */
  83         char            s_lnnoptr[4];   /* file ptr to line numbers     */
  84         char            s_nreloc[2];    /* number of relocation entries */
  85         char            s_nlnno[2];     /* number of line number entries*/
  86         char            s_flags[4];     /* flags                        */
  87 };
  88
  89 /*
  90  * names of "special" sections
  91  */
  92 #define _TEXT   ".text"
  93 #define _DATA   ".data"
  94 #define _BSS    ".bss"
  95 #define _COMMENT ".comment"
  96
  97 #define SCNHDR  struct external_scnhdr
  98 #define SCNHSZ  40
  99
 100
 101 /********************** LINE NUMBERS **********************/
 102
 103 /* 1 line number entry for every "breakpointable" source line in a section.
 104  * Line numbers are grouped on a per function basis; first entry in a function
 105  * grouping will have l_lnno = 0 and in place of physical address will be the
 106  * symbol table index of the function name.
 107  */
 108 struct external_lineno {
 109         union {
 110                 char l_symndx[4];       /* function name symbol index, iff l_lnno == 0*/
 111                 char l_paddr[4];        /* (physical) address of line number    */
 112         } l_addr;
 113         char l_lnno[2]; /* line number          */
 114 };
 115
 116
 117 #define LINENO  struct external_lineno
 118 #define LINESZ  6
 119
 120
 121 /********************** SYMBOLS **********************/
 122
 123 #define E_SYMNMLEN      8       /* # characters in a symbol name        */
 124 #define E_FILNMLEN      14      /* # characters in a file name          */
 125 #define E_DIMNUM        4       /* # array dimensions in auxiliary entry */
 126
 127 struct external_syment
 128 {
 129   union {
 130     char e_name[E_SYMNMLEN];
 131     struct {
 132       char e_zeroes[4];
 133       char e_offset[4];
 134     } e;
 135   } e;
 136   char e_value[4];
 137   char e_scnum[2];
 138   char e_type[2];
 139   char e_sclass[1];
 140   char e_numaux[1];
 141 };
 142
 143
 144
 145 #define N_BTMASK        (017)
 146 #define N_TMASK         (060)
 147 #define N_BTSHFT        (4)
 148 #define N_TSHIFT        (2)
 149
 150
 151 union external_auxent {
 152         struct {
 153                 char x_tagndx[4];       /* str, un, or enum tag indx */
 154                 union {
 155                         struct {
 156                             char  x_lnno[2]; /* declaration line number */
 157                             char  x_size[2]; /* str/union/array size */
 158                         } x_lnsz;
 159                         char x_fsize[4];        /* size of function */
 160                 } x_misc;
 161                 union {
 162                         struct {                /* if ISFCN, tag, or .bb */
 163                             char x_lnnoptr[4];  /* ptr to fcn line # */
 164                             char x_endndx[4];   /* entry ndx past block end */
 165                         } x_fcn;
 166                         struct {                /* if ISARY, up to 4 dimen. */
 167                             char x_dimen[E_DIMNUM][2];
 168                         } x_ary;
 169                 } x_fcnary;
 170                 char x_tvndx[2];                /* tv index */
 171         } x_sym;
 172
 173         union {
 174                 char x_fname[E_FILNMLEN];
 175                 struct {
 176                         char x_zeroes[4];
 177                         char x_offset[4];
 178                 } x_n;
 179         } x_file;
 180
 181         struct {
 182                 char x_scnlen[4];                       /* section length */
 183                 char x_nreloc[2];       /* # relocation entries */
 184                 char x_nlinno[2];       /* # line numbers */
 185         } x_scn;
 186
 187         struct {
 188                 char x_tvfill[4];       /* tv fill value */
 189                 char x_tvlen[2];        /* length of .tv */
 190                 char x_tvran[2][2];     /* tv range */
 191         } x_tv;         /* info about .tv section (in auxent of symbol .tv)) */
 192
 193
 194 };
 195
 196 #define SYMENT  struct external_syment
 197 #define SYMESZ  18
 198 #define AUXENT  union external_auxent
 199 #define AUXESZ  18
 200
 201
 202
 203 /********************** RELOCATION DIRECTIVES **********************/
 204
 205
 206 struct external_reloc {
 207   char r_vaddr[4];
 208   char r_symndx[4];
 209   char r_type[2];
 210 #ifdef M68K_COFF_OFFSET
 211   char r_offset[4];
 212 #endif
 213
 214 };
 215
 216
 217 #define RELOC struct external_reloc
 218
 219 #ifdef M68K_COFF_OFFSET
 220 #define RELSZ 14
 221 #else
 222 #define RELSZ 10
 223 #endif
 224
 225 #endif /* GNU_COFF_M68K_H */