include/coff/i960.h

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