include/coff/i960.h

   1 /* coff information for 80960.  Origins: Intel corp, natch.
   2
   3    Copyright 2001 Free Software Foundation, Inc.
   4
   5    This program is free software; you can redistribute it and/or modify
   6    it under the terms of the GNU General Public License as published by
   7    the Free Software Foundation; either version 2 of the License, or
   8    (at your option) any later version.
   9
  10    This program is distributed in the hope that it will be useful,
  11    but WITHOUT ANY WARRANTY; without even the implied warranty of
  12    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13    GNU General Public License for more details.
  14
  15    You should have received a copy of the GNU General Public License
  16    along with this program; if not, write to the Free Software
  17    Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, MA 02110-1301, USA.  */
  18
  19 /* NOTE: Tagentries (cf TAGBITS) are no longer used by the 960 */
  20
  21 /********************** FILE HEADER **********************/
  22
  23 struct external_filehdr
  24 {
  25   char f_magic[2];      /* magic number                 */
  26   char f_nscns[2];      /* number of sections           */
  27   char f_timdat[4];     /* time & date stamp            */
  28   char f_symptr[4];     /* file pointer to symtab       */
  29   char f_nsyms[4];      /* number of symtab entries     */
  30   char f_opthdr[2];     /* sizeof(optional hdr)         */
  31   char f_flags[2];      /* flags                        */
  32 };
  33
  34 #define OMAGIC      (0407)      /* old impure format. data immediately
  35                                    follows text. both sections are rw. */
  36 #define NMAGIC      (0410)      /* split i&d, read-only text */
  37
  38 /*
  39 *       Intel 80960 (I960) processor flags.
  40 *       F_I960TYPE == mask for processor type field.
  41 */
  42
  43 #define F_I960TYPE      (0xf000)
  44 #define F_I960CORE      (0x1000)
  45 #define F_I960KB        (0x2000)
  46 #define F_I960SB        (0x2000)
  47 #define F_I960MC        (0x3000)
  48 #define F_I960XA        (0x4000)
  49 #define F_I960CA        (0x5000)
  50 #define F_I960KA        (0x6000)
  51 #define F_I960SA        (0x6000)
  52 #define F_I960JX        (0x7000)
  53 #define F_I960HX        (0x8000)
  54
  55
  56 /** i80960 Magic Numbers
  57 */
  58
  59 #define I960ROMAGIC     (0x160) /* read-only text segments */
  60 #define I960RWMAGIC     (0x161) /* read-write text segments */
  61
  62 #define I960BADMAG(x) (((x).f_magic!=I960ROMAGIC) && ((x).f_magic!=I960RWMAGIC))
  63
  64 #define FILHDR  struct external_filehdr
  65 #define FILHSZ  20
  66
  67 /********************** AOUT "OPTIONAL HEADER" **********************/
  68
  69 typedef struct
  70 {
  71   unsigned long phys_addr;
  72   unsigned long bitarray;
  73 } TAGBITS;
  74
  75 typedef struct
  76 {
  77   char  magic[2];               /* type of file                         */
  78   char  vstamp[2];              /* version stamp                        */
  79   char  tsize[4];               /* text size in bytes, padded to FW bdry*/
  80   char  dsize[4];               /* initialized data "  "                */
  81   char  bsize[4];               /* uninitialized data "   "             */
  82   char  entry[4];               /* entry pt.                            */
  83   char  text_start[4];          /* base of text used for this file */
  84   char  data_start[4];          /* base of data used for this file */
  85   char  tagentries[4];          /* number of tag entries to follow */
  86 }
  87 AOUTHDR;
  88
  89 /* return a pointer to the tag bits array */
  90
  91 #define TAGPTR(aout) ((TAGBITS *) (&(aout.tagentries)+1))
  92
  93 /* compute size of a header */
  94
  95 /*#define AOUTSZ(aout) (sizeof(AOUTHDR)+(aout.tagentries*sizeof(TAGBITS)))*/
  96 #define AOUTSZ 32
  97 #define AOUTHDRSZ 32
  98
  99
 100 /********************** SECTION HEADER **********************/
 101
 102 struct external_scnhdr
 103 {
 104   char          s_name[8];      /* section name                 */
 105   char          s_paddr[4];     /* physical address, aliased s_nlib */
 106   char          s_vaddr[4];     /* virtual address              */
 107   char          s_size[4];      /* section size                 */
 108   char          s_scnptr[4];    /* file ptr to raw data for section */
 109   char          s_relptr[4];    /* file ptr to relocation       */
 110   char          s_lnnoptr[4];   /* file ptr to line numbers     */
 111   char          s_nreloc[2];    /* number of relocation entries */
 112   char          s_nlnno[2];     /* number of line number entries*/
 113   char          s_flags[4];     /* flags                        */
 114   char          s_align[4];     /* section alignment            */
 115 };
 116
 117
 118 #define SCNHDR  struct external_scnhdr
 119 #define SCNHSZ  44
 120
 121 /*
 122  * names of "special" sections
 123  */
 124 #define _TEXT   ".text"
 125 #define _DATA   ".data"
 126 #define _BSS    ".bss"
 127
 128 /********************** LINE NUMBERS **********************/
 129
 130 /* 1 line number entry for every "breakpointable" source line in a section.
 131  * Line numbers are grouped on a per function basis; first entry in a function
 132  * grouping will have l_lnno = 0 and in place of physical address will be the
 133  * symbol table index of the function name.
 134  */
 135 struct external_lineno
 136 {
 137   union
 138   {
 139     char l_symndx[4];   /* function name symbol index, iff l_lnno == 0*/
 140     char l_paddr[4];    /* (physical) address of line number    */
 141   } l_addr;
 142
 143   char l_lnno[2];               /* line number          */
 144   char padding[2];      /* force alignment      */
 145 };
 146
 147
 148 #define LINENO  struct external_lineno
 149 #define LINESZ  8
 150
 151 /********************** SYMBOLS **********************/
 152
 153 #define E_SYMNMLEN      8       /* # characters in a symbol name        */
 154 #define E_FILNMLEN      14      /* # characters in a file name          */
 155 #define E_DIMNUM        4       /* # array dimensions in auxiliary entry */
 156
 157 struct external_syment
 158 {
 159   union
 160   {
 161     char e_name[E_SYMNMLEN];
 162
 163     struct
 164     {
 165       char e_zeroes[4];
 166       char e_offset[4];
 167     } e;
 168   } e;
 169
 170   char e_value[4];
 171   char e_scnum[2];
 172   char e_flags[2];
 173   char e_type[4];
 174   char e_sclass[1];
 175   char e_numaux[1];
 176   char pad2[2];
 177 };
 178
 179 #define N_BTMASK        (0x1f)
 180 #define N_TMASK         (0x60)
 181 #define N_BTSHFT        (5)
 182 #define N_TSHIFT        (2)
 183
 184 union external_auxent
 185 {
 186   struct
 187   {
 188     char x_tagndx[4];   /* str, un, or enum tag indx */
 189
 190     union
 191     {
 192       struct
 193       {
 194         char  x_lnno[2]; /* declaration line number */
 195         char  x_size[2]; /* str/union/array size */
 196       } x_lnsz;
 197
 198       char x_fsize[4];  /* size of function */
 199
 200     } x_misc;
 201
 202     union
 203     {
 204       struct            /* if ISFCN, tag, or .bb */
 205       {
 206         char x_lnnoptr[4];      /* ptr to fcn line # */
 207         char x_endndx[4];       /* entry ndx past block end */
 208       } x_fcn;
 209
 210       struct            /* if ISARY, up to 4 dimen. */
 211       {
 212         char x_dimen[E_DIMNUM][2];
 213       } x_ary;
 214
 215     } x_fcnary;
 216
 217     char x_tvndx[2];            /* tv index */
 218
 219   } x_sym;
 220
 221   union
 222   {
 223     char x_fname[E_FILNMLEN];
 224
 225     struct
 226     {
 227       char x_zeroes[4];
 228       char x_offset[4];
 229     } x_n;
 230
 231   } x_file;
 232
 233   struct
 234   {
 235     char x_scnlen[4];                   /* section length */
 236     char x_nreloc[2];   /* # relocation entries */
 237     char x_nlinno[2];   /* # line numbers */
 238
 239   } x_scn;
 240
 241   struct
 242   {
 243     char x_tvfill[4];   /* tv fill value */
 244     char x_tvlen[2];    /* length of .tv */
 245     char x_tvran[2][2]; /* tv range */
 246
 247   } x_tv;               /* info about .tv section (in auxent of symbol .tv)) */
 248
 249   /******************************************
 250    *  I960-specific *2nd* aux. entry formats
 251    ******************************************/
 252   struct
 253   {
 254     /* This is a very old typo that keeps getting propagated. */
 255 #define x_stdindx x_stindx
 256     char x_stindx[4];   /* sys. table entry */
 257   } x_sc;       /* system call entry */
 258
 259   struct
 260   {
 261     char x_balntry[4]; /* BAL entry point */
 262   } x_bal; /* BAL-callable function */
 263
 264   struct
 265   {
 266     char x_timestamp[4];                /* time stamp */
 267     char        x_idstring[20];         /* producer identity string */
 268
 269   } x_ident;                            /* Producer ident info */
 270 };
 271
 272 #define SYMENT  struct external_syment
 273 #define SYMESZ  24
 274 #define AUXENT  union external_auxent
 275 #define AUXESZ  24
 276
 277 #       define _ETEXT   "_etext"
 278
 279 /********************** RELOCATION DIRECTIVES **********************/
 280
 281 struct external_reloc
 282 {
 283   char r_vaddr[4];
 284   char r_symndx[4];
 285   char r_type[2];
 286   char pad[2];
 287 };
 288
 289 /* r_type values for the i960.  */
 290
 291 /* The i960 uses R_RELLONG, which is defined in internal.h as 0x11.
 292    It is an absolute 32 bit relocation.  */
 293
 294 #define R_IPRMED        (0x19)  /* 24-bit ip-relative relocation */
 295 #define R_OPTCALL       (0x1b)  /* 32-bit optimizable call (leafproc/sysproc) */
 296 #define R_OPTCALLX      (0x1c)  /* 64-bit optimizable call (leafproc/sysproc) */
 297
 298 /* The following relocation types are defined use by relaxing linkers,
 299    which convert 32 bit calls (which require a 64 bit instruction)
 300    into 24 bit calls (which require a 32 bit instruction) when
 301    possible.  It will be possible whenever the target of the call is
 302    within a 24 bit range of the call instruction.
 303
 304    It is always safe to ignore these relocations.  They only serve to
 305    mark points which the relaxing linker will have to consider.  The
 306    assembler must ensure that the correct code is generated even if
 307    the relocations are ignored.  In particular, this means that the
 308    R_IPR13 relocation may not appear with an external symbol.  */
 309
 310 #define R_IPR13         (0x1d)  /* 13 bit ip-relative branch */
 311 #define R_ALIGN         (0x1e)  /* alignment marker.  This has no
 312                                    associated symbol.  Instead, the
 313                                    r_symndx field indicates the
 314                                    require alignment at this point in
 315                                    the file.  It must be a power of 2.  */
 316
 317 #define RELOC struct external_reloc
 318 #define RELSZ 12
 319