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_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 struct external_scnhdr
  78 {
  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 #define SCNHDR  struct external_scnhdr
  93
  94 #define SCNHSZ  72
  95
  96 /********************** LINE NUMBERS **********************/
  97
  98 /* 1 line number entry for every "breakpointable" source line in a section.
  99    Line numbers are grouped on a per function basis; first entry in a function
 100    grouping will have l_lnno = 0 and in place of physical address will be the
 101    symbol table index of the function name.  */
 102
 103 struct external_lineno
 104 {
 105   union
 106   {
 107     char l_symndx[4];   /* function name symbol index, iff l_lnno == 0*/
 108     char l_paddr[8];    /* (physical) address of line number    */
 109   } l_addr;
 110
 111   char l_lnno[4];       /* line number          */
 112 };
 113
 114 #define LINENO  struct external_lineno
 115
 116 #define LINESZ  12
 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 #define N_BTMASK        (017)
 135 #define N_TMASK         (060)
 136 #define N_BTSHFT        (4)
 137 #define N_TSHIFT        (2)
 138
 139 union external_auxent
 140 {
 141     struct {
 142         union {
 143             struct {
 144                 char x_lnno[4];         /* declaration line number */
 145                 char x_size[2];         /* str/union/array size */
 146             } x_lnsz;
 147             struct {
 148                 char x_lnnoptr[8];/* ptr to fcn line */
 149                 char x_fsize[4];         /* size of function */
 150                 char x_endndx[4];        /* entry ndx past block end */
 151             } x_fcn;
 152         } x_fcnary;
 153     } x_sym;
 154
 155     struct {
 156         union {
 157             char x_fname[E_FILNMLEN];
 158             struct {
 159                 char x_zeroes[4];
 160                 char x_offset[4];
 161                 char x_pad[6];
 162             } x_n;
 163         } x_n;
 164         unsigned char x_ftype[1];
 165         unsigned char x_resv[2];
 166     } x_file;
 167
 168     struct {
 169         char x_exptr[8];
 170         char x_fsize[4];
 171         char x_endndx[4];
 172         char x_pad[1];
 173     } x_except;
 174
 175     struct {
 176             unsigned char x_scnlen_lo[4];
 177             unsigned char x_parmhash[4];
 178             unsigned char x_snhash[2];
 179             unsigned char x_smtyp[1];
 180             unsigned char x_smclas[1];
 181             unsigned char x_scnlen_hi[4];
 182             unsigned char x_pad[1];
 183     } x_csect;
 184
 185     struct {
 186         char x_pad[17];
 187         char x_auxtype[1];
 188     } x_auxtype;
 189 };
 190
 191 #define SYMENT  struct external_syment
 192 #define SYMESZ  18
 193 #define AUXENT  union external_auxent
 194 #define AUXESZ  18
 195 #define DBXMASK 0x80            /* for dbx storage mask */
 196 #define SYMNAME_IN_DEBUG(symptr) ((symptr)->n_sclass & DBXMASK)
 197
 198 /* Values for auxtype field in XCOFF64, taken from AIX 4.3 sym.h.  */
 199 #define _AUX_EXCEPT     255
 200 #define _AUX_FCN        254
 201 #define _AUX_SYM        253
 202 #define _AUX_FILE       252
 203 #define _AUX_CSECT      251
 204
 205 /********************** RELOCATION DIRECTIVES **********************/
 206
 207 struct external_reloc
 208 {
 209   char r_vaddr[8];
 210   char r_symndx[4];
 211   char r_size[1];
 212   char r_type[1];
 213 };
 214
 215 #define RELOC struct external_reloc
 216 #define RELSZ 14
 217
 218 #define DEFAULT_DATA_SECTION_ALIGNMENT 4
 219 #define DEFAULT_BSS_SECTION_ALIGNMENT 4
 220 #define DEFAULT_TEXT_SECTION_ALIGNMENT 4
 221 /* For new sections we havn't heard of before */
 222 #define DEFAULT_SECTION_ALIGNMENT 4
 223
 224 /* The ldhdr structure.  This appears at the start of the .loader
 225    section.  */
 226
 227 struct external_ldhdr
 228 {
 229   bfd_byte l_version[4];
 230   bfd_byte l_nsyms[4];
 231   bfd_byte l_nreloc[4];
 232   bfd_byte l_istlen[4];
 233   bfd_byte l_nimpid[4];
 234   bfd_byte l_stlen[4];
 235   bfd_byte l_impoff[8];
 236   bfd_byte l_stoff[8];
 237   bfd_byte l_symoff[8];
 238   bfd_byte l_rldoff[8];
 239 };
 240 #define LDHDRSZ (56)
 241
 242 struct external_ldsym
 243 {
 244   bfd_byte l_value[8];
 245   bfd_byte l_offset[4];
 246   bfd_byte l_scnum[2];
 247   bfd_byte l_smtype[1];
 248   bfd_byte l_smclas[1];
 249   bfd_byte l_ifile[4];
 250   bfd_byte l_parm[4];
 251 };
 252
 253 #define LDSYMSZ (24)
 254
 255 struct external_ldrel
 256 {
 257   bfd_byte l_vaddr[8];
 258   bfd_byte l_rtype[2];
 259   bfd_byte l_rsecnm[2];
 260   bfd_byte l_symndx[4];
 261 };
 262
 263 #define LDRELSZ (16)
 264
 265 struct external_exceptab
 266 {
 267   union {
 268     bfd_byte e_symndx[4];
 269     bfd_byte e_paddr[8];
 270   } e_addr;
 271   bfd_byte e_lang[1];
 272   bfd_byte e_reason[1];
 273 };
 274
 275 #define EXCEPTSZ (10)