include/coff/rs6k64.h

   1 /* IBM RS/6000 "XCOFF64" file definitions for BFD.
   2    Copyright (C) 2000-2021 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 3 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., 51 Franklin Street - Fifth Floor, Boston,
  17    MA 02110-1301, USA.  */
  18
  19 /********************** FILE HEADER **********************/
  20
  21 struct external_filehdr
  22 {
  23   char f_magic[2];      /* magic number                 */
  24   char f_nscns[2];      /* number of sections           */
  25   char f_timdat[4];     /* time & date stamp            */
  26   char f_symptr[8];     /* file pointer to symtab       */
  27   char f_opthdr[2];     /* sizeof(optional hdr)         */
  28   char f_flags[2];      /* flags                        */
  29   char f_nsyms[4];      /* number of symtab entries     */
  30 };
  31
  32 /* IBM RS/6000.  */
  33 #define U803XTOCMAGIC 0757      /* Aix 4.3 64-bit XCOFF */
  34 #define U64_TOCMAGIC  0767      /* AIX 5+ 64-bit XCOFF */
  35 #define BADMAG(x) ((x).f_magic != U803XTOCMAGIC && (x).f_magic != U64_TOCMAGIC)
  36
  37 #define FILHDR  struct external_filehdr
  38 #define FILHSZ  24
  39
  40 /********************** AOUT "OPTIONAL HEADER" **********************/
  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_textpsize[1];         /* text page size */
  61   unsigned char o_datapsize[1];         /* data page size */
  62   unsigned char o_stackpsize[1];        /* stack page size */
  63   unsigned char o_flags[1];             /* Flags and TLS alignment */
  64   unsigned char tsize[8];               /* text size bytes, padded to FW bdry */
  65   unsigned char dsize[8];               /* initialized data "  "        */
  66   unsigned char bsize[8];               /* uninitialized data "   "     */
  67   unsigned char entry[8];               /* entry pt.                    */
  68   unsigned char o_maxstack[8];          /* max stack size (??)          */
  69   unsigned char o_maxdata[8];           /* max data size (??)           */
  70   unsigned char o_sntdata[2];           /* section number of .tdata section */
  71   unsigned char o_sntbss[2];            /* section number of .tbss section */
  72   unsigned char o_x64flags[2];          /* XCOFF64 flags */
  73   unsigned char o_resv3[10];            /* reserved                     */
  74 }
  75 AOUTHDR;
  76
  77 #define AOUTSZ 120
  78 #define SMALL_AOUTSZ (0)
  79 #define AOUTHDRSZ 72
  80
  81 /********************** SECTION HEADER **********************/
  82
  83 struct external_scnhdr
  84 {
  85   char  s_name[8];      /* section name                 */
  86   char  s_paddr[8];     /* physical address, aliased s_nlib */
  87   char  s_vaddr[8];     /* virtual address              */
  88   char  s_size[8];      /* section size                 */
  89   char  s_scnptr[8];    /* file ptr to raw data for section */
  90   char  s_relptr[8];    /* file ptr to relocation       */
  91   char  s_lnnoptr[8];   /* file ptr to line numbers     */
  92   char  s_nreloc[4];    /* number of relocation entries */
  93   char  s_nlnno[4];     /* number of line number entries*/
  94   char  s_flags[4];     /* flags                        */
  95   char  s_pad[4];       /* padding */
  96 };
  97
  98 #define SCNHDR  struct external_scnhdr
  99
 100 #define SCNHSZ  72
 101
 102 /********************** LINE NUMBERS **********************/
 103
 104 /* 1 line number entry for every "breakpointable" source line in a section.
 105    Line numbers are grouped on a per function basis; first entry in a function
 106    grouping will have l_lnno = 0 and in place of physical address will be the
 107    symbol table index of the function name.  */
 108
 109 struct external_lineno
 110 {
 111   union
 112   {
 113     char l_symndx[4];   /* function name symbol index, iff l_lnno == 0*/
 114     char l_paddr[8];    /* (physical) address of line number    */
 115   } l_addr;
 116
 117   char l_lnno[4];       /* line number          */
 118 };
 119
 120 #define LINENO  struct external_lineno
 121
 122 #define LINESZ  12
 123
 124 /********************** SYMBOLS **********************/
 125
 126 #define E_SYMNMLEN      8       /* # characters in a symbol name        */
 127 #define E_FILNMLEN      14      /* # characters in a file name          */
 128 #define E_DIMNUM        4       /* # array dimensions in auxiliary entry */
 129
 130 struct external_syment
 131 {
 132   char e_value[8];
 133   char e_offset[4];
 134   char e_scnum[2];
 135   char e_type[2];
 136   char e_sclass[1];
 137   char e_numaux[1];
 138 };
 139
 140 #define N_BTMASK        (017)
 141 #define N_TMASK         (060)
 142 #define N_BTSHFT        (4)
 143 #define N_TSHIFT        (2)
 144
 145 union external_auxent
 146 {
 147     struct {
 148         union {
 149             struct {
 150                 char x_lnno[4];         /* declaration line number */
 151                 char x_size[2];         /* str/union/array size */
 152             } x_lnsz;
 153             struct {
 154                 char x_lnnoptr[8];/* ptr to fcn line */
 155                 char x_fsize[4];         /* size of function */
 156                 char x_endndx[4];        /* entry ndx past block end */
 157             } x_fcn;
 158         } x_fcnary;
 159     } x_sym;
 160
 161     struct {
 162         union {
 163             char x_fname[E_FILNMLEN];
 164             struct {
 165                 char x_zeroes[4];
 166                 char x_offset[4];
 167                 char x_pad[6];
 168             } x_n;
 169         } x_n;
 170         unsigned char x_ftype[1];
 171         unsigned char x_resv[2];
 172     } x_file;
 173
 174     struct {
 175         char x_exptr[8];
 176         char x_fsize[4];
 177         char x_endndx[4];
 178         char x_pad[1];
 179     } x_except;
 180
 181     struct {
 182             unsigned char x_scnlen_lo[4];
 183             unsigned char x_parmhash[4];
 184             unsigned char x_snhash[2];
 185             unsigned char x_smtyp[1];
 186             unsigned char x_smclas[1];
 187             unsigned char x_scnlen_hi[4];
 188             unsigned char x_pad[1];
 189     } x_csect;
 190
 191     struct {
 192         char x_pad[17];
 193         char x_auxtype[1];
 194     } x_auxtype;
 195 };
 196
 197 #define SYMENT  struct external_syment
 198 #define SYMESZ  18
 199 #define AUXENT  union external_auxent
 200 #define AUXESZ  18
 201 #define DBXMASK 0x80            /* for dbx storage mask */
 202 #define SYMNAME_IN_DEBUG(symptr) ((symptr)->n_sclass & DBXMASK)
 203
 204 /* Values for auxtype field in XCOFF64, taken from AIX 4.3 sym.h.  */
 205 #define _AUX_EXCEPT     255
 206 #define _AUX_FCN        254
 207 #define _AUX_SYM        253
 208 #define _AUX_FILE       252
 209 #define _AUX_CSECT      251
 210
 211 /********************** RELOCATION DIRECTIVES **********************/
 212
 213 struct external_reloc
 214 {
 215   char r_vaddr[8];
 216   char r_symndx[4];
 217   char r_size[1];
 218   char r_type[1];
 219 };
 220
 221 #define RELOC struct external_reloc
 222 #define RELSZ 14
 223
 224 #define DEFAULT_DATA_SECTION_ALIGNMENT 4
 225 #define DEFAULT_BSS_SECTION_ALIGNMENT 4
 226 #define DEFAULT_TEXT_SECTION_ALIGNMENT 4
 227 /* For new sections we havn't heard of before */
 228 #define DEFAULT_SECTION_ALIGNMENT 4
 229
 230 /* The ldhdr structure.  This appears at the start of the .loader
 231    section.  */
 232
 233 struct external_ldhdr
 234 {
 235   bfd_byte l_version[4];
 236   bfd_byte l_nsyms[4];
 237   bfd_byte l_nreloc[4];
 238   bfd_byte l_istlen[4];
 239   bfd_byte l_nimpid[4];
 240   bfd_byte l_stlen[4];
 241   bfd_byte l_impoff[8];
 242   bfd_byte l_stoff[8];
 243   bfd_byte l_symoff[8];
 244   bfd_byte l_rldoff[8];
 245 };
 246 #define LDHDRSZ (56)
 247
 248 struct external_ldsym
 249 {
 250   bfd_byte l_value[8];
 251   bfd_byte l_offset[4];
 252   bfd_byte l_scnum[2];
 253   bfd_byte l_smtype[1];
 254   bfd_byte l_smclas[1];
 255   bfd_byte l_ifile[4];
 256   bfd_byte l_parm[4];
 257 };
 258
 259 #define LDSYMSZ (24)
 260
 261 struct external_ldrel
 262 {
 263   bfd_byte l_vaddr[8];
 264   bfd_byte l_rtype[2];
 265   bfd_byte l_rsecnm[2];
 266   bfd_byte l_symndx[4];
 267 };
 268
 269 #define LDRELSZ (16)
 270
 271 struct external_exceptab
 272 {
 273   union {
 274     bfd_byte e_symndx[4];
 275     bfd_byte e_paddr[8];
 276   } e_addr;
 277   bfd_byte e_lang[1];
 278   bfd_byte e_reason[1];
 279 };
 280
 281 #define EXCEPTSZ (10)