include/coff/rs6k64.h

   1 /* IBM RS/6000 "XCOFF64" file definitions for BFD.
   2    Copyright (C) 2000 Free Software Foundation, Inc.
   3
   4    This program is free software; you can redistribute it and/or modify
   5    it under the terms of the GNU General Public License as published by
   6    the Free Software Foundation; either version 2 of the License, or
   7    (at your option) any later version.
   8
   9    This program is distributed in the hope that it will be useful,
  10    but WITHOUT ANY WARRANTY; without even the implied warranty of
  11    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12    GNU General Public License for more details.
  13
  14    You should have received a copy of the GNU General Public License
  15    along with this program; if not, write to the Free Software
  16    Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
  17 */
  18
  19 /********************** FILE HEADER **********************/
  20
  21 struct external_filehdr {
  22         char f_magic[2];        /* magic number                 */
  23         char f_nscns[2];        /* number of sections           */
  24         char f_timdat[4];       /* time & date stamp            */
  25         char f_symptr[8];/* file pointer to symtab      */
  26         char f_opthdr[2];       /* sizeof(optional hdr)         */
  27         char f_flags[2];        /* flags                        */
  28         char f_nsyms[4];        /* number of symtab entries     */
  29 };
  30
  31         /* IBM RS/6000 */
  32 #define U803XTOCMAGIC 0757      /* readonly text segments and TOC, XCOFF64 */
  33
  34 #define BADMAG(x) ((x).f_magic != U803XTOCMAGIC)
  35
  36 #define FILHDR  struct external_filehdr
  37 #define FILHSZ  24
  38
  39 /********************** AOUT "OPTIONAL HEADER" **********************/
  40
  41
  42 typedef struct
  43 {
  44   unsigned char magic[2];               /* type of file                 */
  45   unsigned char vstamp[2];              /* version stamp                */
  46   unsigned char o_debugger[4];          /* reserved                     */
  47   unsigned char text_start[8];  /* base of text used for this file */
  48   unsigned char data_start[8];  /* base of data used for this file */
  49   unsigned char o_toc[8];       /* address of TOC */
  50   unsigned char o_snentry[2];           /* section number of entry point */
  51   unsigned char o_sntext[2];            /* section number of .text section */
  52   unsigned char o_sndata[2];            /* section number of .data section */
  53   unsigned char o_sntoc[2];             /* section number of TOC */
  54   unsigned char o_snloader[2];          /* section number of .loader section */
  55   unsigned char o_snbss[2];             /* section number of .bss section */
  56   unsigned char o_algntext[2];          /* .text alignment */
  57   unsigned char o_algndata[2];          /* .data alignment */
  58   unsigned char o_modtype[2];           /* module type (??) */
  59   unsigned char o_cputype[2];           /* cpu type */
  60   unsigned char o_resv2[4];             /* reserved                     */
  61   unsigned char tsize[8];               /* text size bytes, padded to FW bdry */
  62   unsigned char dsize[8];               /* initialized data "  "        */
  63   unsigned char bsize[8];               /* uninitialized data "   "     */
  64   unsigned char entry[8];               /* entry pt.                    */
  65   unsigned char o_maxstack[8];  /* max stack size (??)          */
  66   unsigned char o_maxdata[8];   /* max data size (??)           */
  67   unsigned char o_resv3[16];            /* reserved                     */
  68 }
  69 AOUTHDR;
  70
  71 #define AOUTSZ 120
  72 #define SMALL_AOUTSZ (0)
  73 #define AOUTHDRSZ 72
  74
  75 /********************** SECTION HEADER **********************/
  76
  77
  78 struct external_scnhdr {
  79         char    s_name[8];              /* section name                 */
  80         char    s_paddr[8];     /* physical address, aliased s_nlib */
  81         char    s_vaddr[8];     /* virtual address              */
  82         char    s_size[8];      /* section size                 */
  83         char    s_scnptr[8];    /* file ptr to raw data for section */
  84         char    s_relptr[8];    /* file ptr to relocation       */
  85         char    s_lnnoptr[8];   /* file ptr to line numbers     */
  86         char    s_nreloc[4];    /* number of relocation entries */
  87         char    s_nlnno[4];     /* number of line number entries*/
  88         char    s_flags[4];             /* flags                        */
  89         char    s_pad[4];               /* padding */
  90 };
  91
  92
  93 #define SCNHDR  struct external_scnhdr
  94
  95 #define SCNHSZ  72
  96
  97 /********************** LINE NUMBERS **********************/
  98
  99 /* 1 line number entry for every "breakpointable" source line in a section.
 100  * Line numbers are grouped on a per function basis; first entry in a function
 101  * grouping will have l_lnno = 0 and in place of physical address will be the
 102  * symbol table index of the function name.
 103  */
 104 struct external_lineno {
 105         union {
 106                 char l_symndx[4];/* function name symbol index, iff l_lnno == 0*/
 107                 char l_paddr[8];        /* (physical) address of line number    */
 108         } l_addr;
 109         char l_lnno[4];         /* line number          */
 110 };
 111
 112
 113 #define LINENO  struct external_lineno
 114
 115 #define LINESZ  12
 116
 117
 118 /********************** SYMBOLS **********************/
 119
 120 #define E_SYMNMLEN      8       /* # characters in a symbol name        */
 121 #define E_FILNMLEN      14      /* # characters in a file name          */
 122 #define E_DIMNUM        4       /* # array dimensions in auxiliary entry */
 123
 124 struct external_syment
 125 {
 126   char e_value[8];
 127   char e_offset[4];
 128   char e_scnum[2];
 129   char e_type[2];
 130   char e_sclass[1];
 131   char e_numaux[1];
 132 };
 133
 134
 135
 136 #define N_BTMASK        (017)
 137 #define N_TMASK         (060)
 138 #define N_BTSHFT        (4)
 139 #define N_TSHIFT        (2)
 140
 141
 142 union external_auxent {
 143
 144     struct {
 145         union {
 146             struct {
 147                 char x_lnno[4];         /* declaration line number */
 148                 char x_size[2];         /* str/union/array size */
 149             } x_lnsz;
 150             struct {
 151                 char x_lnnoptr[8];/* ptr to fcn line */
 152                 char x_fsize[4];         /* size of function */
 153                 char x_endndx[4];        /* entry ndx past block end */
 154             } x_fcn;
 155         } x_fcnary;
 156     } x_sym;
 157
 158     union {
 159         char x_fname[E_FILNMLEN];
 160         struct {
 161             char x_zeroes[4];
 162             char x_offset[4];
 163             char          x_pad[6];
 164             unsigned char x_ftype[1];
 165             unsigned char x_resv[2];
 166         } x_n;
 167     } x_file;
 168
 169     struct {
 170         char x_exptr[8];
 171         char x_fsize[4];
 172         char x_endndx[4];
 173         char x_pad[1];
 174     } x_except;
 175
 176     struct {
 177             unsigned char x_scnlen_lo[4];
 178             unsigned char x_parmhash[4];
 179             unsigned char x_snhash[2];
 180             unsigned char x_smtyp[1];
 181             unsigned char x_smclas[1];
 182             unsigned char x_scnlen_hi[4];
 183             unsigned char x_pad[1];
 184     } x_csect;
 185
 186     struct {
 187         char x_pad[17];
 188         char x_auxtype[1];
 189     } x_auxtype;
 190 };
 191
 192 #define SYMENT  struct external_syment
 193 #define SYMESZ  18
 194 #define AUXENT  union external_auxent
 195 #define AUXESZ  18
 196 #define DBXMASK 0x80            /* for dbx storage mask */
 197 #define SYMNAME_IN_DEBUG(symptr) ((symptr)->n_sclass & DBXMASK)
 198
 199 /* Values for auxtype field in XCOFF64, taken from AIX 4.3 sym.h */
 200 #define _AUX_EXCEPT     255
 201 #define _AUX_FCN        254
 202 #define _AUX_SYM        253
 203 #define _AUX_FILE       252
 204 #define _AUX_CSECT      251
 205
 206
 207
 208 /********************** RELOCATION DIRECTIVES **********************/
 209
 210
 211 struct external_reloc {
 212   char r_vaddr[8];
 213   char r_symndx[4];
 214   char r_size[1];
 215   char r_type[1];
 216 };
 217
 218
 219 #define RELOC struct external_reloc
 220 #define RELSZ 14
 221
 222 #define DEFAULT_DATA_SECTION_ALIGNMENT 4
 223 #define DEFAULT_BSS_SECTION_ALIGNMENT 4
 224 #define DEFAULT_TEXT_SECTION_ALIGNMENT 4
 225 /* For new sections we havn't heard of before */
 226 #define DEFAULT_SECTION_ALIGNMENT 4
 227
 228 /* The ldhdr structure.  This appears at the start of the .loader
 229    section.  */
 230
 231 struct external_ldhdr
 232 {
 233   bfd_byte l_version[4];
 234   bfd_byte l_nsyms[4];
 235   bfd_byte l_nreloc[4];
 236   bfd_byte l_istlen[4];
 237   bfd_byte l_nimpid[4];
 238   bfd_byte l_stlen[4];
 239   bfd_byte l_impoff[8];
 240   bfd_byte l_stoff[8];
 241   bfd_byte l_symoff[8];
 242   bfd_byte l_rldoff[8];
 243 };
 244 #define LDHDRSZ (56)
 245
 246 struct external_ldsym
 247 {
 248   bfd_byte l_value[8];
 249   bfd_byte l_offset[4];
 250   bfd_byte l_scnum[2];
 251   bfd_byte l_smtype[1];
 252   bfd_byte l_smclas[1];
 253   bfd_byte l_ifile[4];
 254   bfd_byte l_parm[4];
 255 };
 256
 257 #define LDSYMSZ (24)
 258
 259 struct external_ldrel
 260 {
 261   bfd_byte l_vaddr[8];
 262   bfd_byte l_rtype[2];
 263   bfd_byte l_rsecnm[2];
 264   bfd_byte l_symndx[4];
 265 };
 266
 267 #define LDRELSZ (16)