include/coff/sh.h

   1 /*** coff information for Hitachi SH */
   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
  17 #define SH_ARCH_MAGIC_BIG       0x0500
  18 #define SH_ARCH_MAGIC_LITTLE    0x0550  /* Little endian SH */
  19
  20
  21 #define SHBADMAG(x) \
  22  (((x).f_magic!=SH_ARCH_MAGIC_BIG) && \
  23   ((x).f_magic!=SH_ARCH_MAGIC_LITTLE))
  24
  25 #define FILHDR  struct external_filehdr
  26 #define FILHSZ  20
  27
  28
  29 /********************** AOUT "OPTIONAL HEADER" **********************/
  30
  31
  32 typedef struct
  33 {
  34   char  magic[2];               /* type of file                         */
  35   char  vstamp[2];              /* version stamp                        */
  36   char  tsize[4];               /* text size in bytes, padded to FW bdry*/
  37   char  dsize[4];               /* initialized data "  "                */
  38   char  bsize[4];               /* uninitialized data "   "             */
  39   char  entry[4];               /* entry pt.                            */
  40   char  text_start[4];          /* base of text used for this file */
  41   char  data_start[4];          /* base of data used for this file */
  42 }
  43 AOUTHDR;
  44
  45
  46 #define AOUTHDRSZ 28
  47 #define AOUTSZ 28
  48
  49
  50
  51
  52 /********************** SECTION HEADER **********************/
  53
  54
  55 struct external_scnhdr {
  56         char            s_name[8];      /* section name                 */
  57         char            s_paddr[4];     /* physical address, aliased s_nlib */
  58         char            s_vaddr[4];     /* virtual address              */
  59         char            s_size[4];      /* section size                 */
  60         char            s_scnptr[4];    /* file ptr to raw data for section */
  61         char            s_relptr[4];    /* file ptr to relocation       */
  62         char            s_lnnoptr[4];   /* file ptr to line numbers     */
  63         char            s_nreloc[2];    /* number of relocation entries */
  64         char            s_nlnno[2];     /* number of line number entries*/
  65         char            s_flags[4];     /* flags                        */
  66 };
  67
  68 /*
  69  * names of "special" sections
  70  */
  71 #define _TEXT   ".text"
  72 #define _DATA   ".data"
  73 #define _BSS    ".bss"
  74
  75
  76 #define SCNHDR  struct external_scnhdr
  77 #define SCNHSZ  40
  78
  79
  80 /********************** LINE NUMBERS **********************/
  81
  82 /* 1 line number entry for every "breakpointable" source line in a section.
  83  * Line numbers are grouped on a per function basis; first entry in a function
  84  * grouping will have l_lnno = 0 and in place of physical address will be the
  85  * symbol table index of the function name.
  86  */
  87 struct external_lineno {
  88         union {
  89                 char l_symndx[4];       /* function name symbol index, iff l_lnno == 0*/
  90                 char l_paddr[4];        /* (physical) address of line number    */
  91         } l_addr;
  92         char l_lnno[4]; /* line number          */
  93 };
  94
  95 #define GET_LINENO_LNNO(abfd, ext) bfd_h_get_32(abfd, (bfd_byte *) (ext->l_lnno));
  96 #define PUT_LINENO_LNNO(abfd,val, ext) bfd_h_put_32(abfd,val,  (bfd_byte *) (ext->l_lnno));
  97
  98 #define LINENO  struct external_lineno
  99 #define LINESZ  8
 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 /* The external reloc has an offset field, because some of the reloc
 187    types on the h8 don't have room in the instruction for the entire
 188    offset - eg the strange jump and high page addressing modes */
 189
 190 struct external_reloc {
 191   char r_vaddr[4];
 192   char r_symndx[4];
 193   char r_offset[4];
 194   char r_type[2];
 195   char r_stuff[2];
 196 };
 197
 198
 199 #define RELOC struct external_reloc
 200 #define RELSZ 16
 201
 202 /* SH relocation types.  Not all of these are actually used.  */
 203
 204 #define R_SH_UNUSED     0               /* only used internally */
 205 #define R_SH_PCREL8     3               /*  8 bit pcrel         */
 206 #define R_SH_PCREL16    4               /* 16 bit pcrel         */
 207 #define R_SH_HIGH8      5               /* high 8 bits of 24 bit address */
 208 #define R_SH_LOW16      7               /* low 16 bits of 24 bit immediate */
 209 #define R_SH_IMM24      6               /* 24 bit immediate */
 210 #define R_SH_PCDISP8BY4 9               /* PC rel 8 bits *4 +ve */
 211 #define R_SH_PCDISP8BY2 10              /* PC rel 8 bits *2 +ve */
 212 #define R_SH_PCDISP8    11              /* 8 bit branch */
 213 #define R_SH_PCDISP     12              /* 12 bit branch */
 214 #define R_SH_IMM32      14              /* 32 bit immediate */
 215 #define R_SH_IMM8       16              /* 8 bit immediate */
 216 #define R_SH_IMM8BY2    17              /* 8 bit immediate *2 */
 217 #define R_SH_IMM8BY4    18              /* 8 bit immediate *4 */
 218 #define R_SH_IMM4       19              /* 4 bit immediate */
 219 #define R_SH_IMM4BY2    20              /* 4 bit immediate *2 */
 220 #define R_SH_IMM4BY4    21              /* 4 bit immediate *4 */
 221 #define R_SH_PCRELIMM8BY2   22          /* PC rel 8 bits *2 unsigned */
 222 #define R_SH_PCRELIMM8BY4   23          /* PC rel 8 bits *4 unsigned */
 223 #define R_SH_IMM16      24              /* 16 bit immediate */
 224
 225 /* The switch table reloc types are used for relaxing.  They are
 226    generated for expressions such as
 227      .word L1 - L2
 228    The r_offset field holds the difference between the reloc address
 229    and L2.  */
 230 #define R_SH_SWITCH8    33              /* 8 bit switch table entry */
 231 #define R_SH_SWITCH16   25              /* 16 bit switch table entry */
 232 #define R_SH_SWITCH32   26              /* 32 bit switch table entry */
 233
 234 /* The USES reloc type is used for relaxing.  The compiler will
 235    generate .uses pseudo-ops when it finds a function call which it
 236    can relax.  The r_offset field of the USES reloc holds the PC
 237    relative offset to the instruction which loads the register used in
 238    the function call.  */
 239 #define R_SH_USES       27              /* .uses pseudo-op */
 240
 241 /* The COUNT reloc type is used for relaxing.  The assembler will
 242    generate COUNT relocs for addresses referred to by the register
 243    loads associated with USES relocs.  The r_offset field of the COUNT
 244    reloc holds the number of times the address is referenced in the
 245    object file.  */
 246 #define R_SH_COUNT      28              /* Count of constant pool uses */
 247
 248 /* The ALIGN reloc type is used for relaxing.  The r_offset field is
 249    the power of two to which subsequent portions of the object file
 250    must be aligned.  */
 251 #define R_SH_ALIGN      29              /* .align pseudo-op */
 252
 253 /* The CODE and DATA reloc types are used for aligning load and store
 254    instructions.  The assembler will generate a CODE reloc before a
 255    block of instructions.  It will generate a DATA reloc before data.
 256    A section should be processed assuming it contains data, unless a
 257    CODE reloc is seen.  The only relevant pieces of information in the
 258    CODE and DATA relocs are the section and the address.  The symbol
 259    and offset are meaningless.  */
 260 #define R_SH_CODE       30              /* start of code */
 261 #define R_SH_DATA       31              /* start of data */
 262
 263 /* The LABEL reloc type is used for aligning load and store
 264    instructions.  The assembler will generate a LABEL reloc for each
 265    label within a block of instructions.  This permits the linker to
 266    avoid swapping instructions which are the targets of branches.  */
 267 #define R_SH_LABEL      32              /* label */
 268
 269 /* NB: R_SH_SWITCH8 is 33 */