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[/] [open8_urisc/] [trunk/] [gnu/] [binutils/] [include/] [coff/] [mips.h] - Blame information for rev 24

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/* ECOFF support on MIPS machines.
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   coff/ecoff.h must be included before this file.
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   Copyright 1999, 2004, 2010 Free Software Foundation, Inc.
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   This program is free software; you can redistribute it and/or modify
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   it under the terms of the GNU General Public License as published by
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   the Free Software Foundation; either version 3 of the License, or
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   (at your option) any later version.
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   This program is distributed in the hope that it will be useful,
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   but WITHOUT ANY WARRANTY; without even the implied warranty of
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   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
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   GNU General Public License for more details.
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   You should have received a copy of the GNU General Public License
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   along with this program; if not, write to the Free Software
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   Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
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   MA 02110-1301, USA.  */
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#define DO_NOT_DEFINE_AOUTHDR
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#define L_LNNO_SIZE 4
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#include "coff/external.h"
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/* Magic numbers are defined in coff/ecoff.h.  */
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#define MIPS_ECOFF_BADMAG(x) (((x).f_magic!=MIPS_MAGIC_1) && \
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                              ((x).f_magic!=MIPS_MAGIC_LITTLE) &&\
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                              ((x).f_magic!=MIPS_MAGIC_BIG) && \
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                              ((x).f_magic!=MIPS_MAGIC_LITTLE2) && \
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                              ((x).f_magic!=MIPS_MAGIC_BIG2) && \
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                              ((x).f_magic!=MIPS_MAGIC_LITTLE3) && \
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                              ((x).f_magic!=MIPS_MAGIC_BIG3))
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/********************** AOUT "OPTIONAL HEADER" **********************/
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typedef struct external_aouthdr
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{
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  unsigned char magic[2];       /* type of file                         */
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  unsigned char vstamp[2];      /* version stamp                        */
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  unsigned char tsize[4];       /* text size in bytes, padded to FW bdry*/
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  unsigned char dsize[4];       /* initialized data "  "                */
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  unsigned char bsize[4];       /* uninitialized data "   "             */
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  unsigned char entry[4];       /* entry pt.                            */
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  unsigned char text_start[4];  /* base of text used for this file */
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  unsigned char data_start[4];  /* base of data used for this file */
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  unsigned char bss_start[4];   /* base of bss used for this file */
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  unsigned char gprmask[4];     /* ?? */
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  unsigned char cprmask[4][4];  /* ?? */
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  unsigned char gp_value[4];    /* value for gp register */
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} AOUTHDR;
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/* compute size of a header */
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#define AOUTSZ 56
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#define AOUTHDRSZ 56
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/********************** RELOCATION DIRECTIVES **********************/
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struct external_reloc
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  {
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    unsigned char r_vaddr[4];
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    unsigned char r_bits[4];
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  };
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#define RELOC struct external_reloc
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#define RELSZ 8
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/* MIPS ECOFF uses a packed 8 byte format for relocs.  These constants
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   are used to unpack the r_bits field.  */
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#define RELOC_BITS0_SYMNDX_SH_LEFT_BIG          16
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#define RELOC_BITS0_SYMNDX_SH_LEFT_LITTLE       0
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#define RELOC_BITS1_SYMNDX_SH_LEFT_BIG          8
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#define RELOC_BITS1_SYMNDX_SH_LEFT_LITTLE       8
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#define RELOC_BITS2_SYMNDX_SH_LEFT_BIG          0
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#define RELOC_BITS2_SYMNDX_SH_LEFT_LITTLE       16
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/* Originally, ECOFF used four bits for the reloc type and had three
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   reserved bits.  Irix 4 added another bit for the reloc type, which
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   was easy because it was big endian and one of the spare bits became
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   the new most significant bit.  To make this also work for little
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   endian ECOFF, we need to wrap one of the reserved bits around to
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   become the most significant bit of the reloc type.  */
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#define RELOC_BITS3_TYPE_BIG                    0x3E
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#define RELOC_BITS3_TYPE_SH_BIG                 1
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#define RELOC_BITS3_TYPE_LITTLE                 0x78
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#define RELOC_BITS3_TYPE_SH_LITTLE              3
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#define RELOC_BITS3_TYPEHI_LITTLE               0x04
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#define RELOC_BITS3_TYPEHI_SH_LITTLE            2
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#define RELOC_BITS3_EXTERN_BIG                  0x01
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#define RELOC_BITS3_EXTERN_LITTLE               0x80
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/* The r_type field in a reloc is one of the following values.  I
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   don't know if any other values can appear.  These seem to be all
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   that occur in the Ultrix 4.2 libraries.  */
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#define MIPS_R_IGNORE   0
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#define MIPS_R_REFHALF  1
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#define MIPS_R_REFWORD  2
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#define MIPS_R_JMPADDR  3
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#define MIPS_R_REFHI    4
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#define MIPS_R_REFLO    5
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#define MIPS_R_GPREL    6
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#define MIPS_R_LITERAL  7
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/* FIXME: This relocation is used (internally only) to represent branches
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   when assembling.  It should never appear in output files, and
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   be removed.  (It used to be used for embedded-PIC support.)  */
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#define MIPS_R_PCREL16  12
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/********************** STABS **********************/
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#define MIPS_IS_STAB ECOFF_IS_STAB
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#define MIPS_MARK_STAB ECOFF_MARK_STAB
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#define MIPS_UNMARK_STAB ECOFF_UNMARK_STAB
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/********************** SYMBOLIC INFORMATION **********************/
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/* Written by John Gilmore.  */
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/* ECOFF uses COFF-like section structures, but its own symbol format.
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   This file defines the symbol format in fields whose size and alignment
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   will not vary on different host systems.  */
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/* File header as a set of bytes */
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struct hdr_ext
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{
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        unsigned char   h_magic[2];
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        unsigned char   h_vstamp[2];
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        unsigned char   h_ilineMax[4];
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        unsigned char   h_cbLine[4];
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        unsigned char   h_cbLineOffset[4];
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        unsigned char   h_idnMax[4];
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        unsigned char   h_cbDnOffset[4];
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        unsigned char   h_ipdMax[4];
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        unsigned char   h_cbPdOffset[4];
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        unsigned char   h_isymMax[4];
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        unsigned char   h_cbSymOffset[4];
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        unsigned char   h_ioptMax[4];
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        unsigned char   h_cbOptOffset[4];
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        unsigned char   h_iauxMax[4];
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        unsigned char   h_cbAuxOffset[4];
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        unsigned char   h_issMax[4];
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        unsigned char   h_cbSsOffset[4];
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        unsigned char   h_issExtMax[4];
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        unsigned char   h_cbSsExtOffset[4];
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        unsigned char   h_ifdMax[4];
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        unsigned char   h_cbFdOffset[4];
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        unsigned char   h_crfd[4];
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        unsigned char   h_cbRfdOffset[4];
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        unsigned char   h_iextMax[4];
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        unsigned char   h_cbExtOffset[4];
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};
158
 
159
/* File descriptor external record */
160
 
161
struct fdr_ext
162
{
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        unsigned char   f_adr[4];
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        unsigned char   f_rss[4];
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        unsigned char   f_issBase[4];
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        unsigned char   f_cbSs[4];
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        unsigned char   f_isymBase[4];
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        unsigned char   f_csym[4];
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        unsigned char   f_ilineBase[4];
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        unsigned char   f_cline[4];
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        unsigned char   f_ioptBase[4];
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        unsigned char   f_copt[4];
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        unsigned char   f_ipdFirst[2];
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        unsigned char   f_cpd[2];
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        unsigned char   f_iauxBase[4];
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        unsigned char   f_caux[4];
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        unsigned char   f_rfdBase[4];
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        unsigned char   f_crfd[4];
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        unsigned char   f_bits1[1];
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        unsigned char   f_bits2[3];
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        unsigned char   f_cbLineOffset[4];
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        unsigned char   f_cbLine[4];
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};
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#define FDR_BITS1_LANG_BIG              0xF8
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#define FDR_BITS1_LANG_SH_BIG           3
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#define FDR_BITS1_LANG_LITTLE           0x1F
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#define FDR_BITS1_LANG_SH_LITTLE        0
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#define FDR_BITS1_FMERGE_BIG            0x04
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#define FDR_BITS1_FMERGE_LITTLE         0x20
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#define FDR_BITS1_FREADIN_BIG           0x02
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#define FDR_BITS1_FREADIN_LITTLE        0x40
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#define FDR_BITS1_FBIGENDIAN_BIG        0x01
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#define FDR_BITS1_FBIGENDIAN_LITTLE     0x80
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#define FDR_BITS2_GLEVEL_BIG            0xC0
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#define FDR_BITS2_GLEVEL_SH_BIG         6
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#define FDR_BITS2_GLEVEL_LITTLE         0x03
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#define FDR_BITS2_GLEVEL_SH_LITTLE      0
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/* We ignore the `reserved' field in bits2. */
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/* Procedure descriptor external record */
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struct pdr_ext
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{
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        unsigned char   p_adr[4];
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        unsigned char   p_isym[4];
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        unsigned char   p_iline[4];
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        unsigned char   p_regmask[4];
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        unsigned char   p_regoffset[4];
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        unsigned char   p_iopt[4];
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        unsigned char   p_fregmask[4];
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        unsigned char   p_fregoffset[4];
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        unsigned char   p_frameoffset[4];
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        unsigned char   p_framereg[2];
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        unsigned char   p_pcreg[2];
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        unsigned char   p_lnLow[4];
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        unsigned char   p_lnHigh[4];
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        unsigned char   p_cbLineOffset[4];
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};
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/* Runtime procedure table */
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228
struct rpdr_ext
229
{
230
        unsigned char   p_adr[4];
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        unsigned char   p_regmask[4];
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        unsigned char   p_regoffset[4];
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        unsigned char   p_fregmask[4];
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        unsigned char   p_fregoffset[4];
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        unsigned char   p_frameoffset[4];
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        unsigned char   p_framereg[2];
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        unsigned char   p_pcreg[2];
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        unsigned char   p_irpss[4];
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        unsigned char   p_reserved[4];
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        unsigned char   p_exception_info[4];
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};
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243
/* Line numbers */
244
 
245
struct line_ext
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{
247
        unsigned char   l_line[4];
248
};
249
 
250
/* Symbol external record */
251
 
252
struct sym_ext
253
{
254
        unsigned char   s_iss[4];
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        unsigned char   s_value[4];
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        unsigned char   s_bits1[1];
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        unsigned char   s_bits2[1];
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        unsigned char   s_bits3[1];
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        unsigned char   s_bits4[1];
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};
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#define SYM_BITS1_ST_BIG                0xFC
263
#define SYM_BITS1_ST_SH_BIG             2
264
#define SYM_BITS1_ST_LITTLE             0x3F
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#define SYM_BITS1_ST_SH_LITTLE          0
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#define SYM_BITS1_SC_BIG                0x03
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#define SYM_BITS1_SC_SH_LEFT_BIG        3
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#define SYM_BITS1_SC_LITTLE             0xC0
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#define SYM_BITS1_SC_SH_LITTLE          6
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#define SYM_BITS2_SC_BIG                0xE0
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#define SYM_BITS2_SC_SH_BIG             5
274
#define SYM_BITS2_SC_LITTLE             0x07
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#define SYM_BITS2_SC_SH_LEFT_LITTLE     2
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277
#define SYM_BITS2_RESERVED_BIG          0x10
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#define SYM_BITS2_RESERVED_LITTLE       0x08
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#define SYM_BITS2_INDEX_BIG             0x0F
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#define SYM_BITS2_INDEX_SH_LEFT_BIG     16
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#define SYM_BITS2_INDEX_LITTLE          0xF0
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#define SYM_BITS2_INDEX_SH_LITTLE       4
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#define SYM_BITS3_INDEX_SH_LEFT_BIG     8
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#define SYM_BITS3_INDEX_SH_LEFT_LITTLE  4
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#define SYM_BITS4_INDEX_SH_LEFT_BIG     0
289
#define SYM_BITS4_INDEX_SH_LEFT_LITTLE  12
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291
/* External symbol external record */
292
 
293
struct ext_ext
294
{
295
        unsigned char   es_bits1[1];
296
        unsigned char   es_bits2[1];
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        unsigned char   es_ifd[2];
298
        struct  sym_ext es_asym;
299
};
300
 
301
#define EXT_BITS1_JMPTBL_BIG            0x80
302
#define EXT_BITS1_JMPTBL_LITTLE         0x01
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304
#define EXT_BITS1_COBOL_MAIN_BIG        0x40
305
#define EXT_BITS1_COBOL_MAIN_LITTLE     0x02
306
 
307
#define EXT_BITS1_WEAKEXT_BIG           0x20
308
#define EXT_BITS1_WEAKEXT_LITTLE        0x04
309
 
310
/* Dense numbers external record */
311
 
312
struct dnr_ext
313
{
314
        unsigned char   d_rfd[4];
315
        unsigned char   d_index[4];
316
};
317
 
318
/* Relative file descriptor */
319
 
320
struct rfd_ext
321
{
322
  unsigned char rfd[4];
323
};
324
 
325
/* Optimizer symbol external record */
326
 
327
struct opt_ext
328
{
329
  unsigned char o_bits1[1];
330
  unsigned char o_bits2[1];
331
  unsigned char o_bits3[1];
332
  unsigned char o_bits4[1];
333
  struct rndx_ext o_rndx;
334
  unsigned char o_offset[4];
335
};
336
 
337
#define OPT_BITS2_VALUE_SH_LEFT_BIG     16
338
#define OPT_BITS2_VALUE_SH_LEFT_LITTLE  0
339
 
340
#define OPT_BITS3_VALUE_SH_LEFT_BIG     8
341
#define OPT_BITS3_VALUE_SH_LEFT_LITTLE  8
342
 
343
#define OPT_BITS4_VALUE_SH_LEFT_BIG     0
344
#define OPT_BITS4_VALUE_SH_LEFT_LITTLE  16

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