include/coff-i960.h

   1 /*** coff information for 80960.  Origins: Intel corp, natch. */
   2
   3 /* This include file is also used for rudimentary ECOFF support on MIPS
   4    machines.  Such differences as are needed are #ifdef MIPS.  */
   5
   6 /* NOTE: Tagentries (cf TAGBITS) are not used by the 960 */
   7
   8 /********************** FILE HEADER **********************/
   9
  10 struct external_filehdr {
  11         char f_magic[2];        /* magic number                 */
  12         char f_nscns[2];        /* number of sections           */
  13         char f_timdat[4];       /* time & date stamp            */
  14         char f_symptr[4];       /* file pointer to symtab       */
  15         char f_nsyms[4];        /* number of symtab entries     */
  16         char f_opthdr[2];       /* sizeof(optional hdr)         */
  17         char f_flags[2];        /* flags                        */
  18 };
  19
  20 #define OMAGIC      (0407)      /* old impure format. data immediately
  21                                    follows text. both sections are rw. */
  22 #define NMAGIC      (0410)      /* split i&d, read-only text */
  23
  24 /*
  25 *       Intel 80960 (I960) processor flags.
  26 *       F_I960TYPE == mask for processor type field.
  27 */
  28
  29 #define F_I960TYPE      (0xf000)
  30 #define F_I960CORE      (0x1000)
  31 #define F_I960KB        (0x2000)
  32 #define F_I960SB        (0x2000)
  33 #define F_I960MC        (0x3000)
  34 #define F_I960XA        (0x4000)
  35 #define F_I960CA        (0x5000)
  36 #define F_I960KA        (0x6000)
  37 #define F_I960SA        (0x6000)
  38
  39
  40 /** i80960 Magic Numbers
  41 */
  42
  43 #define I960ROMAGIC     (0x160) /* read-only text segments */
  44 #define I960RWMAGIC     (0x161) /* read-write text segments */
  45
  46 #define I960BADMAG(x) (((x).f_magic!=I960ROMAGIC) && ((x).f_magic!=I960RWMAGIC))
  47
  48 #define FILHDR  struct external_filehdr
  49 #define FILHSZ  20
  50
  51 /********************** AOUT "OPTIONAL HEADER" **********************/
  52
  53 typedef struct {
  54         unsigned long   phys_addr;
  55         unsigned long   bitarray;
  56 } TAGBITS;
  57
  58
  59
  60 typedef struct
  61 {
  62   char  magic[2];               /* type of file                         */
  63   char  vstamp[2];              /* version stamp                        */
  64   char  tsize[4];               /* text size in bytes, padded to FW bdry*/
  65   char  dsize[4];               /* initialized data "  "                */
  66   char  bsize[4];               /* uninitialized data "   "             */
  67   char  entry[4];               /* entry pt.                            */
  68   char  text_start[4];          /* base of text used for this file */
  69   char  data_start[4];          /* base of data used for this file */
  70   char  tagentries[4];          /* number of tag entries to follow */
  71 }
  72 AOUTHDR;
  73
  74 /* return a pointer to the tag bits array */
  75
  76 #define TAGPTR(aout) ((TAGBITS *) (&(aout.tagentries)+1))
  77
  78 /* compute size of a header */
  79
  80 /*#define AOUTSZ(aout) (sizeof(AOUTHDR)+(aout.tagentries*sizeof(TAGBITS)))*/
  81 #define AOUTSZ (sizeof(AOUTHDR))
  82
  83
  84
  85 /********************** SECTION HEADER **********************/
  86
  87
  88 struct external_scnhdr {
  89         char            s_name[8];      /* section name                 */
  90         char            s_paddr[4];     /* physical address, aliased s_nlib */
  91         char            s_vaddr[4];     /* virtual address              */
  92         char            s_size[4];      /* section size                 */
  93         char            s_scnptr[4];    /* file ptr to raw data for section */
  94         char            s_relptr[4];    /* file ptr to relocation       */
  95         char            s_lnnoptr[4];   /* file ptr to line numbers     */
  96         char            s_nreloc[2];    /* number of relocation entries */
  97         char            s_nlnno[2];     /* number of line number entries*/
  98         char            s_flags[4];     /* flags                        */
  99         char            s_align[4];     /* section alignment            */
 100 };
 101
 102
 103 #define SCNHDR  struct external_scnhdr
 104 #define SCNHSZ  sizeof(SCNHDR)
 105
 106
 107 /********************** LINE NUMBERS **********************/
 108
 109 /* 1 line number entry for every "breakpointable" source line in a section.
 110  * Line numbers are grouped on a per function basis; first entry in a function
 111  * grouping will have l_lnno = 0 and in place of physical address will be the
 112  * symbol table index of the function name.
 113  */
 114 struct external_lineno {
 115         union {
 116                 char l_symndx[4];       /* function name symbol index, iff l_lnno == 0*/
 117                 char l_paddr[4];        /* (physical) address of line number    */
 118         } l_addr;
 119         char l_lnno[2];         /* line number          */
 120         char padding[2];        /* force alignment      */
 121 };
 122
 123
 124 #define LINENO  struct external_lineno
 125 #define LINESZ  8
 126
 127
 128 /********************** SYMBOLS **********************/
 129
 130 #define SYMNMLEN        8       /* # characters in a symbol name        */
 131 #define FILNMLEN        14      /* # characters in a file name          */
 132 #define DIMNUM          4       /* # array dimensions in auxiliary entry */
 133
 134 struct external_syment
 135 {
 136   union {
 137     char e_name[SYMNMLEN];
 138     struct {
 139       char e_zeroes[4];
 140       char e_offset[4];
 141     } e;
 142   } e;
 143   char e_value[4];
 144   char e_scnum[2];
 145   char e_flags[2];
 146   char e_type[4];
 147   char e_sclass[1];
 148   char e_numaux[1];
 149   char pad2[2];
 150 };
 151
 152
 153
 154
 155 #define N_BTMASK        (0x1f)
 156 #define N_TMASK         (0x60)
 157 #define N_BTSHFT        (5)
 158 #define N_TSHIFT        (2)
 159
 160 union external_auxent {
 161         struct {
 162                 char x_tagndx[4];       /* str, un, or enum tag indx */
 163                 union {
 164                         struct {
 165                             char  x_lnno[2]; /* declaration line number */
 166                             char  x_size[2]; /* str/union/array size */
 167                         } x_lnsz;
 168                         char x_fsize[4];        /* size of function */
 169                 } x_misc;
 170                 union {
 171                         struct {                /* if ISFCN, tag, or .bb */
 172                             char x_lnnoptr[4];  /* ptr to fcn line # */
 173                             char x_endndx[4];   /* entry ndx past block end */
 174                         } x_fcn;
 175                         struct {                /* if ISARY, up to 4 dimen. */
 176                             char x_dimen[DIMNUM][2];
 177                         } x_ary;
 178                 } x_fcnary;
 179                 char x_tvndx[2];                /* tv index */
 180         } x_sym;
 181
 182         union {
 183                 char x_fname[FILNMLEN];
 184                 struct {
 185                         char x_zeroes[4];
 186                         char x_offset[4];
 187                 } x_n;
 188         } x_file;
 189
 190         struct {
 191                 char x_scnlen[4];                       /* section length */
 192                 char x_nreloc[2];       /* # relocation entries */
 193                 char x_nlinno[2];       /* # line numbers */
 194         } x_scn;
 195
 196         struct {
 197                 char x_tvfill[4];       /* tv fill value */
 198                 char x_tvlen[2];        /* length of .tv */
 199                 char x_tvran[2][2];     /* tv range */
 200         } x_tv;         /* info about .tv section (in auxent of symbol .tv)) */
 201
 202         /******************************************
 203          *  I960-specific *2nd* aux. entry formats
 204          ******************************************/
 205         struct {
 206           /* This is a very old typo that keeps getting propagated. */
 207 #define x_stdindx x_stindx
 208                 char x_stindx[4];       /* sys. table entry */
 209         } x_sc; /* system call entry */
 210
 211         struct {
 212                 char x_balntry[4]; /* BAL entry point */
 213         } x_bal; /* BAL-callable function */
 214
 215         struct {
 216                 char x_timestamp[4];            /* time stamp */
 217                 char    x_idstring[20];         /* producer identity string */
 218         } x_ident;                              /* Producer ident info */
 219
 220 };
 221
 222
 223
 224 #define SYMENT  struct external_syment
 225 #define SYMESZ  sizeof(SYMENT)                  /* FIXME - calc by hand */
 226 #define AUXENT  union external_auxent
 227 #define AUXESZ  sizeof(AUXENT)                  /* FIXME - calc by hand */
 228
 229 #       define _ETEXT   "_etext"
 230
 231 /********************** RELOCATION DIRECTIVES **********************/
 232
 233 struct external_reloc {
 234   char r_vaddr[4];
 235   char r_symndx[4];
 236   char r_type[2];
 237   char pad[2];
 238 };
 239
 240
 241 /* Relevent values for r_type and i960.  Would someone please document them */
 242
 243
 244 #define RELOC struct external_reloc
 245 #define RELSZ 12
 246
 247 #define DEFAULT_DATA_SECTION_ALIGNMENT 4
 248 #define DEFAULT_BSS_SECTION_ALIGNMENT 4
 249 #define DEFAULT_TEXT_SECTION_ALIGNMENT 16
 250 /* For new sections we havn't heard of before */
 251 #define DEFAULT_SECTION_ALIGNMENT 4