include/coff/powerpc.h

   1 /*** coff information for the powerpc.  */
   2
   3
   4 /********************** FILE HEADER **********************/
   5
   6 struct external_filehdr {
   7         char f_magic[2];        /* magic number                 */
   8         char f_nscns[2];        /* number of sections           */
   9         char f_timdat[4];       /* time & date stamp            */
  10         char f_symptr[4];       /* file pointer to symtab       */
  11         char f_nsyms[4];        /* number of symtab entries     */
  12         char f_opthdr[2];       /* sizeof(optional hdr)         */
  13         char f_flags[2];        /* flags                        */
  14 };
  15
  16 /* Bits for f_flags:
  17  *      F_RELFLG        relocation info stripped from file
  18  *      F_EXEC          file is executable (no unresolved external references)
  19  *      F_LNNO          line numbers stripped from file
  20  *      F_LSYMS         local symbols stripped from file
  21  *      F_AR32WR        file has byte ordering of an AR32WR machine (e.g. vax)
  22  */
  23
  24 #define F_RELFLG        (0x0001)
  25 #define F_EXEC          (0x0002)
  26 #define F_LNNO          (0x0004)
  27 #define F_LSYMS         (0x0008)
  28
  29 /* made this one up by looking at the .o on the ppc nt box */
  30 #define PPCMAGIC        0760
  31
  32 /* extra NT defines */
  33 #define DOSMAGIC       0x5a4d
  34 #define NT_SIGNATURE   0x00004550
  35
  36 #define PPCBADMAG(x) ((x).f_magic != PPCMAGIC)
  37
  38 #define FILHDR  struct external_filehdr
  39 #define FILHSZ  sizeof(FILHDR)
  40
  41
  42 /********************** AOUT "OPTIONAL HEADER" **********************/
  43
  44
  45 typedef struct
  46 {
  47   char  magic[2];               /* type of file                         */
  48   char  vstamp[2];              /* version stamp                        */
  49   char  tsize[4];               /* text size in bytes, padded to FW bdry*/
  50   char  dsize[4];               /* initialized data "  "                */
  51   char  bsize[4];               /* uninitialized data "   "             */
  52   char  entry[4];               /* entry pt.                            */
  53   char  text_start[4];          /* base of text used for this file */
  54   char  data_start[4];          /* base of data used for this file */
  55
  56
  57 }
  58 AOUTHDR;
  59
  60
  61 /* Blindly imported from coff-i386.h (krk) */
  62
  63 #define AOUTSZ (sizeof(AOUTHDR))
  64
  65 #define OMAGIC          0404    /* object files, eg as output */
  66 #define ZMAGIC          0413    /* demand load format, eg normal ld output */
  67 #define STMAGIC         0401    /* target shlib */
  68 #define SHMAGIC         0443    /* host   shlib */
  69
  70
  71 /* define some NT default values */
  72 /*  #define NT_IMAGE_BASE        0x400000 moved to internal.h */
  73 #define NT_SECTION_ALIGNMENT 0x1000
  74 #define NT_FILE_ALIGNMENT    0x200  /* 0x1000 */  /* 0x200 */
  75 #define NT_DEF_RESERVE       0x100000
  76 #define NT_DEF_COMMIT        0x1000
  77
  78 /********************** SECTION HEADER **********************/
  79
  80
  81 struct external_scnhdr {
  82         char            s_name[8];      /* section name                 */
  83         char            s_paddr[4];     /* physical address, aliased s_nlib */
  84         char            s_vaddr[4];     /* virtual address              */
  85         char            s_size[4];      /* section size                 */
  86         char            s_scnptr[4];    /* file ptr to raw data for section */
  87         char            s_relptr[4];    /* file ptr to relocation       */
  88         char            s_lnnoptr[4];   /* file ptr to line numbers     */
  89         char            s_nreloc[2];    /* number of relocation entries */
  90         char            s_nlnno[2];     /* number of line number entries*/
  91         char            s_flags[4];     /* flags                        */
  92 };
  93
  94 #define SCNHDR  struct external_scnhdr
  95 #define SCNHSZ  sizeof(SCNHDR)
  96
  97 /*
  98  * names of "special" sections
  99  */
 100 #define _TEXT   ".text"
 101 #define _DATA   ".data"
 102 #define _BSS    ".bss"
 103 #define _COMMENT ".comment"
 104 #define _LIB ".lib"
 105
 106 /********************** LINE NUMBERS **********************/
 107
 108 /* 1 line number entry for every "breakpointable" source line in a section.
 109  * Line numbers are grouped on a per function basis; first entry in a function
 110  * grouping will have l_lnno = 0 and in place of physical address will be the
 111  * symbol table index of the function name.
 112  */
 113 struct external_lineno {
 114         union {
 115                 char l_symndx[4];       /* function name symbol index, iff l_lnno == 0*/
 116                 char l_paddr[4];        /* (physical) address of line number    */
 117         } l_addr;
 118         char l_lnno[2]; /* line number          */
 119 };
 120
 121
 122 #define LINENO  struct external_lineno
 123 #define LINESZ  6
 124
 125
 126 /********************** SYMBOLS **********************/
 127
 128 #define E_SYMNMLEN      8       /* # characters in a symbol name        */
 129
 130
 131 /* Allow the file name length to be overridden */
 132 #ifndef E_FILNMLEN
 133 #define E_FILNMLEN      14      /* # characters in a file name          */
 134 #endif
 135
 136 #define E_DIMNUM        4       /* # array dimensions in auxiliary entry */
 137
 138 struct external_syment
 139 {
 140   union {
 141     char e_name[E_SYMNMLEN];
 142     struct {
 143       char e_zeroes[4];
 144       char e_offset[4];
 145     } e;
 146   } e;
 147   char e_value[4];
 148   char e_scnum[2];
 149   char e_type[2];
 150   char e_sclass[1];
 151   char e_numaux[1];
 152 };
 153
 154 #define N_BTMASK        (0xf)
 155 #define N_TMASK         (0x30)
 156 #define N_BTSHFT        (4)
 157 #define N_TSHIFT        (2)
 158
 159 union external_auxent {
 160         struct {
 161                 char x_tagndx[4];       /* str, un, or enum tag indx */
 162                 union {
 163                         struct {
 164                             char  x_lnno[2]; /* declaration line number */
 165                             char  x_size[2]; /* str/union/array size */
 166                         } x_lnsz;
 167                         char x_fsize[4];        /* size of function */
 168                 } x_misc;
 169                 union {
 170                         struct {                /* if ISFCN, tag, or .bb */
 171                             char x_lnnoptr[4];  /* ptr to fcn line # */
 172                             char x_endndx[4];   /* entry ndx past block end */
 173                         } x_fcn;
 174                         struct {                /* if ISARY, up to 4 dimen. */
 175                             char x_dimen[E_DIMNUM][2];
 176                         } x_ary;
 177                 } x_fcnary;
 178                 char x_tvndx[2];                /* tv index */
 179         } x_sym;
 180
 181         union {
 182                 char x_fname[E_FILNMLEN];
 183                 struct {
 184                         char x_zeroes[4];
 185                         char x_offset[4];
 186                 } x_n;
 187         } x_file;
 188
 189         struct {
 190                 char x_scnlen[4];       /* section length */
 191                 char x_nreloc[2];       /* # relocation entries */
 192                 char x_nlinno[2];       /* # line numbers */
 193         } x_scn;
 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 #       define _ETEXT   "etext"
 203
 204
 205 /********************** RELOCATION DIRECTIVES **********************/
 206
 207
 208
 209 struct external_reloc {
 210   char r_vaddr[4];
 211   char r_symndx[4];
 212   char r_type[2];
 213 };
 214
 215
 216 #define RELOC struct external_reloc
 217 #define RELSZ 10
 218
 219 #define DEFAULT_DATA_SECTION_ALIGNMENT 4
 220 #define DEFAULT_BSS_SECTION_ALIGNMENT 4
 221 #define DEFAULT_TEXT_SECTION_ALIGNMENT 4
 222 /* For new sections we havn't heard of before */
 223 #define DEFAULT_SECTION_ALIGNMENT 4