include/coff/rs6k64.h

   1 /* IBM RS/6000 "XCOFF64" file definitions for BFD.
   2
   3    Copyright 2000 Free Software Foundation, Inc.
   4
   5    This program is free software; you can redistribute it and/or modify
   6    it under the terms of the GNU General Public License as published by
   7    the Free Software Foundation; either version 2 of the License, or
   8    (at your option) any later version.
   9
  10    This program is distributed in the hope that it will be useful,
  11    but WITHOUT ANY WARRANTY; without even the implied warranty of
  12    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13    GNU General Public License for more details.
  14
  15    You should have received a copy of the GNU General Public License
  16    along with this program; if not, write to the Free Software
  17    Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.  */
  18
  19 #define DO_NOT_DEFINE_AOUTHDR
  20 #define DO_NOT_DEFINE_SCNHDR
  21 #define DO_NOT_DEFINE_LINENO
  22 #define DO_NOT_DEFINE_AUXENT
  23 #include "coff/external.h"
  24
  25         /* IBM RS/6000 */
  26 #define U803XTOCMAGIC 0757      /* readonly text segments and TOC, XCOFF64 */
  27
  28 #define BADMAG(x) ((x).f_magic != U803XTOCMAGIC)
  29
  30 /********************** AOUT "OPTIONAL HEADER" **********************/
  31
  32 typedef struct
  33 {
  34   unsigned char magic[2];       /* type of file                 */
  35   unsigned char vstamp[2];      /* version stamp                */
  36   unsigned char o_debugger[4];  /* reserved                     */
  37   unsigned char text_start[8];  /* base of text used for this file */
  38   unsigned char data_start[8];  /* base of data used for this file */
  39   unsigned char o_toc[8];       /* address of TOC */
  40   unsigned char o_snentry[2];   /* section number of entry point */
  41   unsigned char o_sntext[2];    /* section number of .text section */
  42   unsigned char o_sndata[2];    /* section number of .data section */
  43   unsigned char o_sntoc[2];     /* section number of TOC */
  44   unsigned char o_snloader[2];  /* section number of .loader section */
  45   unsigned char o_snbss[2];     /* section number of .bss section */
  46   unsigned char o_algntext[2];  /* .text alignment */
  47   unsigned char o_algndata[2];  /* .data alignment */
  48   unsigned char o_modtype[2];   /* module type (??) */
  49   unsigned char o_cputype[2];   /* cpu type */
  50   unsigned char o_resv2[4];     /* reserved                     */
  51   unsigned char tsize[8];       /* text size bytes, padded to FW bdry */
  52   unsigned char dsize[8];       /* initialized data "  "        */
  53   unsigned char bsize[8];       /* uninitialized data "   "     */
  54   unsigned char entry[8];       /* entry pt.                    */
  55   unsigned char o_maxstack[8];  /* max stack size (??)          */
  56   unsigned char o_maxdata[8];   /* max data size (??)           */
  57   unsigned char o_resv3[16];    /* reserved                     */
  58 }
  59 AOUTHDR;
  60
  61 #define AOUTSZ 120
  62 #define SMALL_AOUTSZ (0)
  63 #define AOUTHDRSZ 72
  64
  65 #define RS6K_AOUTHDR_OMAGIC     0x0107  /* old: text & data writeable */
  66 #define RS6K_AOUTHDR_NMAGIC     0x0108  /* new: text r/o, data r/w */
  67 #define RS6K_AOUTHDR_ZMAGIC     0x010B  /* paged: text r/o, both page-aligned */
  68
  69
  70 /********************** SECTION HEADER **********************/
  71 struct external_scnhdr
  72 {
  73         char    s_name[8];      /* section name                 */
  74         char    s_paddr[8];     /* physical address, aliased s_nlib */
  75         char    s_vaddr[8];     /* virtual address              */
  76         char    s_size[8];      /* section size                 */
  77         char    s_scnptr[8];    /* file ptr to raw data for section */
  78         char    s_relptr[8];    /* file ptr to relocation       */
  79         char    s_lnnoptr[8];   /* file ptr to line numbers     */
  80         char    s_nreloc[4];    /* number of relocation entries */
  81         char    s_nlnno[4];     /* number of line number entries*/
  82         char    s_flags[4];     /* flags                        */
  83         char    s_pad[4];       /* padding */
  84 };
  85
  86 /*
  87  * names of "special" sections
  88  */
  89 #define _TEXT   ".text"
  90 #define _DATA   ".data"
  91 #define _BSS    ".bss"
  92 #define _PAD    ".pad"
  93 #define _LOADER ".loader"
  94
  95 #define SCNHDR  struct external_scnhdr
  96
  97 #define SCNHSZ  72
  98
  99 /* XCOFF uses a special .loader section with type STYP_LOADER.  */
 100 #define STYP_LOADER 0x1000
 101
 102 /* XCOFF uses a special .debug section with type STYP_DEBUG.  */
 103 #define STYP_DEBUG 0x2000
 104
 105 /* XCOFF handles line number or relocation overflow by creating
 106    another section header with STYP_OVRFLO set.  */
 107 #define STYP_OVRFLO 0x8000
 108
 109 /********************** LINE NUMBERS **********************/
 110
 111 /* 1 line number entry for every "breakpointable" source line in a section.
 112    Line numbers are grouped on a per function basis; first entry in a function
 113    grouping will have l_lnno = 0 and in place of physical address will be the
 114    symbol table index of the function name.  */
 115 struct external_lineno
 116 {
 117   union
 118   {
 119     char l_symndx[8];/* function name symbol index, iff l_lnno == 0*/
 120     char l_paddr[8];    /* (physical) address of line number    */
 121   } l_addr;
 122
 123   char l_lnno[4];               /* line number          */
 124 };
 125
 126 #define LINENO  struct external_lineno
 127 #define LINESZ  12
 128
 129
 130 union external_auxent
 131 {
 132   struct
 133   {
 134     union
 135     {
 136       struct
 137       {
 138         char x_lnno[4];         /* declaration line number */
 139         char x_size[2];         /* str/union/array size */
 140       } x_lnsz;
 141
 142       struct
 143       {
 144         char x_lnnoptr[8];/* ptr to fcn line */
 145         char x_fsize[4];         /* size of function */
 146         char x_endndx[4];        /* entry ndx past block end */
 147       } x_fcn;
 148
 149     } x_fcnary;
 150
 151   } x_sym;
 152
 153   union
 154   {
 155     char x_fname[E_FILNMLEN];
 156
 157     struct
 158     {
 159       char x_zeroes[4];
 160       char x_offset[4];
 161       char          x_pad[6];
 162       unsigned char x_ftype[1];
 163       unsigned char x_resv[2];
 164     } x_n;
 165
 166   } x_file;
 167
 168   struct
 169   {
 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   {
 178     unsigned char x_scnlen_lo[4];
 179     unsigned char x_parmhash[4];
 180     unsigned char x_snhash[2];
 181     unsigned char x_smtyp[1];
 182     unsigned char x_smclas[1];
 183     unsigned char x_scnlen_hi[4];
 184     unsigned char x_pad[1];
 185   } x_csect;
 186
 187   struct
 188   {
 189     char x_pad[17];
 190     char x_auxtype[1];
 191   } x_auxtype;
 192 };
 193
 194 #define AUXENT  union external_auxent
 195 #define AUXESZ  18
 196
 197 #define DBXMASK 0x80            /* for dbx storage mask */
 198 #define SYMNAME_IN_DEBUG(symptr) ((symptr)->n_sclass & DBXMASK)
 199
 200 /* Values for auxtype field in XCOFF64, taken from AIX 4.3 sym.h */
 201 #define _AUX_EXCEPT     255
 202 #define _AUX_FCN        254
 203 #define _AUX_SYM        253
 204 #define _AUX_FILE       252
 205 #define _AUX_CSECT      251
 206
 207 /********************** RELOCATION DIRECTIVES **********************/
 208
 209 struct external_reloc
 210 {
 211   char r_vaddr[8];
 212   char r_symndx[4];
 213   char r_size[1];
 214   char r_type[1];
 215 };
 216
 217 #define RELOC struct external_reloc
 218 #define RELSZ 14
 219
 220 #define DEFAULT_DATA_SECTION_ALIGNMENT 4
 221 #define DEFAULT_BSS_SECTION_ALIGNMENT 4
 222 #define DEFAULT_TEXT_SECTION_ALIGNMENT 4
 223 /* For new sections we havn't heard of before */
 224 #define DEFAULT_SECTION_ALIGNMENT 4