Open64: osprey/cygnus/include/coff/mips.h Source File

00001 /*
00002  * Copyright 2003, 2004, 2005, 2006 PathScale, Inc.  All Rights Reserved.
00003  */
00004 
00005 /* ECOFF support on MIPS machines.
00006    coff/ecoff.h must be included before this file.
00007    
00008    Copyright 1999, 2004 Free Software Foundation, Inc.
00009 
00010    This program is free software; you can redistribute it and/or modify
00011    it under the terms of the GNU General Public License as published by
00012    the Free Software Foundation; either version 2 of the License, or
00013    (at your option) any later version.
00014    
00015    This program is distributed in the hope that it will be useful,
00016    but WITHOUT ANY WARRANTY; without even the implied warranty of
00017    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
00018    GNU General Public License for more details.
00019    
00020    You should have received a copy of the GNU General Public License
00021    along with this program; if not, write to the Free Software
00022    Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.  */
00023 
00024 #define DO_NOT_DEFINE_AOUTHDR
00025 #define L_LNNO_SIZE 4
00026 #include "coff/external.h"
00027 
00028 /* Magic numbers are defined in coff/ecoff.h.  */
00029 #define MIPS_ECOFF_BADMAG(x) (((x).f_magic!=MIPS_MAGIC_1) && \
00030             ((x).f_magic!=MIPS_MAGIC_LITTLE) &&\
00031             ((x).f_magic!=MIPS_MAGIC_BIG) && \
00032             ((x).f_magic!=MIPS_MAGIC_LITTLE2) && \
00033             ((x).f_magic!=MIPS_MAGIC_BIG2) && \
00034             ((x).f_magic!=MIPS_MAGIC_LITTLE3) && \
00035             ((x).f_magic!=MIPS_MAGIC_BIG3))
00036 
00037 
00038 /********************** AOUT "OPTIONAL HEADER" **********************/
00039 
00040 typedef struct external_aouthdr
00041 {
00042   unsigned char magic[2]; /* type of file       */
00043   unsigned char vstamp[2];  /* version stamp      */
00044   unsigned char tsize[4]; /* text size in bytes, padded to FW bdry*/
00045   unsigned char dsize[4]; /* initialized data "  "    */
00046   unsigned char bsize[4]; /* uninitialized data "   "   */
00047   unsigned char entry[4]; /* entry pt.        */
00048   unsigned char text_start[4];  /* base of text used for this file */
00049   unsigned char data_start[4];  /* base of data used for this file */
00050   unsigned char bss_start[4]; /* base of bss used for this file */
00051   unsigned char gprmask[4]; /* ?? */
00052   unsigned char cprmask[4][4];  /* ?? */
00053   unsigned char gp_value[4];  /* value for gp register */
00054 } AOUTHDR;
00055 
00056 /* compute size of a header */
00057 
00058 #define AOUTSZ 56
00059 #define AOUTHDRSZ 56
00060 
00061 /********************** RELOCATION DIRECTIVES **********************/
00062 
00063 struct external_reloc
00064   {
00065     unsigned char r_vaddr[4];
00066     unsigned char r_bits[4];
00067   };
00068 
00069 #define RELOC struct external_reloc
00070 #define RELSZ 8
00071 
00072 /* MIPS ECOFF uses a packed 8 byte format for relocs.  These constants
00073    are used to unpack the r_bits field.  */
00074 
00075 #define RELOC_BITS0_SYMNDX_SH_LEFT_BIG    16
00076 #define RELOC_BITS0_SYMNDX_SH_LEFT_LITTLE 0
00077 
00078 #define RELOC_BITS1_SYMNDX_SH_LEFT_BIG    8
00079 #define RELOC_BITS1_SYMNDX_SH_LEFT_LITTLE 8
00080 
00081 #define RELOC_BITS2_SYMNDX_SH_LEFT_BIG    0
00082 #define RELOC_BITS2_SYMNDX_SH_LEFT_LITTLE 16
00083 
00084 /* Originally, ECOFF used four bits for the reloc type and had three
00085    reserved bits.  Irix 4 added another bit for the reloc type, which
00086    was easy because it was big endian and one of the spare bits became
00087    the new most significant bit.  To make this also work for little
00088    endian ECOFF, we need to wrap one of the reserved bits around to
00089    become the most significant bit of the reloc type.  */
00090 #define RELOC_BITS3_TYPE_BIG      0x3E
00091 #define RELOC_BITS3_TYPE_SH_BIG     1
00092 #define RELOC_BITS3_TYPE_LITTLE     0x78
00093 #define RELOC_BITS3_TYPE_SH_LITTLE    3
00094 #define RELOC_BITS3_TYPEHI_LITTLE   0x04
00095 #define RELOC_BITS3_TYPEHI_SH_LITTLE    2
00096 
00097 #define RELOC_BITS3_EXTERN_BIG      0x01
00098 #define RELOC_BITS3_EXTERN_LITTLE   0x80
00099 
00100 /* The r_type field in a reloc is one of the following values.  I
00101    don't know if any other values can appear.  These seem to be all
00102    that occur in the Ultrix 4.2 libraries.  */
00103 #define MIPS_R_IGNORE 0
00104 #define MIPS_R_REFHALF  1
00105 #define MIPS_R_REFWORD  2
00106 #define MIPS_R_JMPADDR  3
00107 #define MIPS_R_REFHI  4
00108 #define MIPS_R_REFLO  5
00109 #define MIPS_R_GPREL  6
00110 #define MIPS_R_LITERAL  7
00111 
00112 /* FIXME: This relocation is used (internally only) to represent branches
00113    when assembling.  It should never appear in output files, and  
00114    be removed.  (It used to be used for embedded-PIC support.)  */
00115 #define MIPS_R_PCREL16  12
00116 
00117 /********************** STABS **********************/
00118 
00119 #define MIPS_IS_STAB ECOFF_IS_STAB
00120 #define MIPS_MARK_STAB ECOFF_MARK_STAB
00121 #define MIPS_UNMARK_STAB ECOFF_UNMARK_STAB
00122 
00123 /********************** SYMBOLIC INFORMATION **********************/
00124 
00125 /* Written by John Gilmore.  */
00126 
00127 /* ECOFF uses COFF-like section structures, but its own symbol format.
00128    This file defines the symbol format in fields whose size and alignment
00129    will not vary on different host systems.  */
00130 
00131 /* File header as a set of bytes */
00132 
00133 struct hdr_ext
00134 {
00135   unsigned char   h_magic[2];
00136   unsigned char h_vstamp[2];
00137   unsigned char h_ilineMax[4];
00138   unsigned char h_cbLine[4];
00139   unsigned char h_cbLineOffset[4];
00140   unsigned char h_idnMax[4];
00141   unsigned char h_cbDnOffset[4];
00142   unsigned char h_ipdMax[4];
00143   unsigned char h_cbPdOffset[4];
00144   unsigned char h_isymMax[4];
00145   unsigned char h_cbSymOffset[4];
00146   unsigned char h_ioptMax[4];
00147   unsigned char h_cbOptOffset[4];
00148   unsigned char h_iauxMax[4];
00149   unsigned char h_cbAuxOffset[4];
00150   unsigned char h_issMax[4];
00151   unsigned char h_cbSsOffset[4];
00152   unsigned char h_issExtMax[4];
00153   unsigned char h_cbSsExtOffset[4];
00154   unsigned char h_ifdMax[4];
00155   unsigned char h_cbFdOffset[4];
00156   unsigned char h_crfd[4];
00157   unsigned char h_cbRfdOffset[4];
00158   unsigned char h_iextMax[4];
00159   unsigned char h_cbExtOffset[4];
00160 };
00161 
00162 /* File descriptor external record */
00163 
00164 struct fdr_ext
00165 {
00166   unsigned char f_adr[4];
00167   unsigned char f_rss[4];
00168   unsigned char f_issBase[4];
00169   unsigned char f_cbSs[4];
00170   unsigned char f_isymBase[4];
00171   unsigned char f_csym[4];
00172   unsigned char f_ilineBase[4];
00173   unsigned char f_cline[4];
00174   unsigned char f_ioptBase[4];
00175   unsigned char f_copt[4];
00176   unsigned char f_ipdFirst[2];
00177   unsigned char f_cpd[2];
00178   unsigned char f_iauxBase[4];
00179   unsigned char f_caux[4];
00180   unsigned char f_rfdBase[4];
00181   unsigned char f_crfd[4];
00182   unsigned char f_bits1[1];
00183   unsigned char f_bits2[3];
00184   unsigned char f_cbLineOffset[4];
00185   unsigned char f_cbLine[4];
00186 };
00187 
00188 #define FDR_BITS1_LANG_BIG    0xF8
00189 #define FDR_BITS1_LANG_SH_BIG   3
00190 #define FDR_BITS1_LANG_LITTLE   0x1F
00191 #define FDR_BITS1_LANG_SH_LITTLE  0
00192 
00193 #define FDR_BITS1_FMERGE_BIG    0x04
00194 #define FDR_BITS1_FMERGE_LITTLE   0x20
00195 
00196 #define FDR_BITS1_FREADIN_BIG   0x02
00197 #define FDR_BITS1_FREADIN_LITTLE  0x40
00198 
00199 #define FDR_BITS1_FBIGENDIAN_BIG  0x01
00200 #define FDR_BITS1_FBIGENDIAN_LITTLE 0x80
00201 
00202 #define FDR_BITS2_GLEVEL_BIG    0xC0
00203 #define FDR_BITS2_GLEVEL_SH_BIG   6
00204 #define FDR_BITS2_GLEVEL_LITTLE   0x03
00205 #define FDR_BITS2_GLEVEL_SH_LITTLE  0
00206 
00207 /* We ignore the `reserved' field in bits2. */
00208 
00209 /* Procedure descriptor external record */
00210 
00211 struct pdr_ext
00212 {
00213   unsigned char p_adr[4];
00214   unsigned char p_isym[4];
00215   unsigned char p_iline[4];
00216   unsigned char p_regmask[4];
00217   unsigned char p_regoffset[4];
00218   unsigned char p_iopt[4];
00219   unsigned char p_fregmask[4];
00220   unsigned char p_fregoffset[4];
00221   unsigned char p_frameoffset[4];
00222   unsigned char p_framereg[2];
00223   unsigned char p_pcreg[2];
00224   unsigned char p_lnLow[4];
00225   unsigned char p_lnHigh[4];
00226   unsigned char p_cbLineOffset[4];
00227 };
00228 
00229 /* Runtime procedure table */
00230 
00231 struct rpdr_ext
00232 {
00233   unsigned char p_adr[4];
00234   unsigned char p_regmask[4];
00235   unsigned char p_regoffset[4];
00236   unsigned char p_fregmask[4];
00237   unsigned char p_fregoffset[4];
00238   unsigned char p_frameoffset[4];
00239   unsigned char p_framereg[2];
00240   unsigned char p_pcreg[2];
00241   unsigned char p_irpss[4];
00242   unsigned char p_reserved[4];
00243   unsigned char p_exception_info[4];
00244 };
00245 
00246 /* Line numbers */
00247 
00248 struct line_ext
00249 {
00250   unsigned char l_line[4];
00251 };
00252 
00253 /* Symbol external record */
00254 
00255 struct sym_ext
00256 {
00257   unsigned char s_iss[4];
00258   unsigned char s_value[4];
00259   unsigned char s_bits1[1];
00260   unsigned char s_bits2[1];
00261   unsigned char s_bits3[1];
00262   unsigned char s_bits4[1];
00263 };
00264 
00265 #define SYM_BITS1_ST_BIG    0xFC
00266 #define SYM_BITS1_ST_SH_BIG   2
00267 #define SYM_BITS1_ST_LITTLE   0x3F
00268 #define SYM_BITS1_ST_SH_LITTLE    0
00269 
00270 #define SYM_BITS1_SC_BIG    0x03
00271 #define SYM_BITS1_SC_SH_LEFT_BIG  3
00272 #define SYM_BITS1_SC_LITTLE   0xC0
00273 #define SYM_BITS1_SC_SH_LITTLE    6
00274 
00275 #define SYM_BITS2_SC_BIG    0xE0
00276 #define SYM_BITS2_SC_SH_BIG   5
00277 #define SYM_BITS2_SC_LITTLE   0x07
00278 #define SYM_BITS2_SC_SH_LEFT_LITTLE 2
00279 
00280 #define SYM_BITS2_RESERVED_BIG    0x10
00281 #define SYM_BITS2_RESERVED_LITTLE 0x08
00282 
00283 #define SYM_BITS2_INDEX_BIG   0x0F
00284 #define SYM_BITS2_INDEX_SH_LEFT_BIG 16
00285 #define SYM_BITS2_INDEX_LITTLE    0xF0
00286 #define SYM_BITS2_INDEX_SH_LITTLE 4
00287 
00288 #define SYM_BITS3_INDEX_SH_LEFT_BIG 8
00289 #define SYM_BITS3_INDEX_SH_LEFT_LITTLE  4
00290 
00291 #define SYM_BITS4_INDEX_SH_LEFT_BIG 0
00292 #define SYM_BITS4_INDEX_SH_LEFT_LITTLE  12
00293 
00294 /* External symbol external record */
00295 
00296 struct ext_ext
00297 {
00298   unsigned char es_bits1[1];
00299   unsigned char es_bits2[1];
00300   unsigned char es_ifd[2];
00301   struct  sym_ext es_asym;
00302 };
00303 
00304 #define EXT_BITS1_JMPTBL_BIG    0x80
00305 #define EXT_BITS1_JMPTBL_LITTLE   0x01
00306 
00307 #define EXT_BITS1_COBOL_MAIN_BIG  0x40
00308 #define EXT_BITS1_COBOL_MAIN_LITTLE 0x02
00309 
00310 #define EXT_BITS1_WEAKEXT_BIG   0x20
00311 #define EXT_BITS1_WEAKEXT_LITTLE  0x04
00312 
00313 /* Dense numbers external record */
00314 
00315 struct dnr_ext
00316 {
00317   unsigned char d_rfd[4];
00318   unsigned char d_index[4];
00319 };
00320 
00321 /* Relative file descriptor */
00322 
00323 struct rfd_ext
00324 {
00325   unsigned char rfd[4];
00326 };
00327 
00328 /* Optimizer symbol external record */
00329 
00330 struct opt_ext
00331 {
00332   unsigned char o_bits1[1];
00333   unsigned char o_bits2[1];
00334   unsigned char o_bits3[1];
00335   unsigned char o_bits4[1];
00336   struct rndx_ext o_rndx;
00337   unsigned char o_offset[4];
00338 };
00339 
00340 #define OPT_BITS2_VALUE_SH_LEFT_BIG 16
00341 #define OPT_BITS2_VALUE_SH_LEFT_LITTLE  0
00342 
00343 #define OPT_BITS3_VALUE_SH_LEFT_BIG 8
00344 #define OPT_BITS3_VALUE_SH_LEFT_LITTLE  8
00345 
00346 #define OPT_BITS4_VALUE_SH_LEFT_BIG 0
00347 #define OPT_BITS4_VALUE_SH_LEFT_LITTLE  16