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[/] [or1k/] [trunk/] [insight/] [include/] [coff/] [or16.h] - Blame information for rev 1771

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1 578 markom
/* COFF specification for OpenRISC 1000.
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   Copyright (C) 1993-2000 Free Software Foundation, Inc.
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   Contributed by David Wood @ New York University.
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   Modified by Johan Rydberg, <johan.rydberg@netinsight.se>
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This file is part of BFD, the Binary File Descriptor library.
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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 2 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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.  */
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#ifndef OR16
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# define OR16
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#endif
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/* File Header and related definitions:  */
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struct external_filehdr {
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        char f_magic[2];        /* magic number          */
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        char f_nscns[2];        /* number of sections      */
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        char f_timdat[4];       /* time & date stamp        */
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        char f_symptr[4];       /* file pointer to symtab       */
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        char f_nsyms[4];        /* number of symtab entries     */
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        char f_opthdr[2];       /* sizeof(optional hdr)  */
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        char f_flags[2];        /* flags                        */
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};
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#define FILHDR  struct external_filehdr
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#define FILHSZ  20
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/* Magic numbers for OpenRISC 16. As it is know we use the
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   numbers for Am29000.
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   (AT&T will assign the "real" magic number) */
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#define SIPFBOMAGIC     0572    /* Am29000 (Byte 0 is MSB) */
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#define SIPRBOMAGIC     0573    /* Am29000 (Byte 0 is LSB) */
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#define OR16_MAGIC_BIG          SIPFBOMAGIC     
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#define OR16_MAGIC_LITTLE       SIPRBOMAGIC     
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#define OR16BADMAG(x)     (((x).f_magic!=OR16_MAGIC_BIG) && \
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                                              ((x).f_magic!=OR16_MAGIC_LITTLE))
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#define OMAGIC OR16_MAGIC_BIG
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/* Optional (a.out) header:  */
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typedef struct external_aouthdr {
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  char  magic[2];         /* type of file                     */
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  char  vstamp[2];            /* version stamp                    */
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  char  tsize[4];               /* text size in bytes, padded to FW bdry*/
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  char  dsize[4];               /* initialized data "  "            */
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  char  bsize[4];               /* uninitialized data "   "         */
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  char  entry[4];               /* entry pt.                        */
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  char  text_start[4];    /* base of text used for this file  */
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  char  data_start[4];    /* base of data used for this file  */
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} AOUTHDR;
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#define AOUTSZ      28
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#define AOUTHDRSZ   28
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/* aouthdr magic numbers */
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#define NMAGIC    0410    /* separate i/d executable */
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#define SHMAGIC   0406          /* NYU/Ultra3 shared data executable 
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                             (writable text) */
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#define _ETEXT          "_etext"
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/* Section header and related definitions:  */
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struct external_scnhdr {
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        char        s_name[8];      /* section name                   */
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        char        s_paddr[4];     /* physical address, aliased s_nlib */
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        char        s_vaddr[4];     /* virtual address                */
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        char        s_size[4];      /* section size                   */
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        char        s_scnptr[4];    /* file ptr to raw data for section */
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        char        s_relptr[4];    /* file ptr to relocation         */
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        char        s_lnnoptr[4];   /* file ptr to line numbers       */
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        char        s_nreloc[2];    /* number of relocation entries   */
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        char        s_nlnno[2];     /* number of line number entries  */
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        char        s_flags[4];     /* flags                          */
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};
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#define SCNHDR  struct external_scnhdr
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#define SCNHSZ  40
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/* Names of "special" sections:  */
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#define _TEXT   ".text"
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#define _DATA   ".data"
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#define _BSS    ".bss"
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#define _LIT    ".lit"
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/* Section types - with additional section type for global
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   registers which will be relocatable for the OpenRISC 1000.
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   In instances where it is necessary for a linker to produce an
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   output file which contains text or data not based at virtual
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   address 0, e.g. for a ROM, then the linker should accept
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   address base information as command input and use PAD sections
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   to skip over unused addresses.  */
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#define STYP_BSSREG 0x1200      /* Global register area (like STYP_INFO) */
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#define STYP_ENVIR  0x2200      /* Environment (like STYP_INFO) */
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#define STYP_ABS    0x4000      /* Absolute (allocated, not reloc, loaded) */
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/* Relocation information declaration and related definitions:  */
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struct external_reloc {
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  char r_vaddr[4];    /* (virtual) address of reference */
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  char r_symndx[4];   /* index into symbol table */
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  char r_type[2];     /* relocation type */
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};
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#define RELOC           struct external_reloc
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#define RELSZ           10                    /* sizeof (RELOC) */ 
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/* OR16 relocation types.  Not all of these are actually used.  */
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#define R_OR16_NONE       0
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#define R_OR16_ABS        1 /* reference is absolute */
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#define R_OR16_INSN_REL   2 /* insn relative (jmp/call) */
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#define R_OR16_INSN_ABS   3 /* insn absolute (jmp/call) */
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#define R_OR16_INSN_LO    4 /* insn low half (16-bit) */
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#define R_OR16_INSN_HI    5 /* insn hi half (16-bit) */
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#define R_OR16_INSN_IHI   10 /* insn hi half (part 2) */
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#define R_OR16_8          6 /* relocatable byte value */
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#define R_OR16_16         7 /* relocatable halfword value */
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#define R_OR16_32         8 /* relocatable word value */
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#define R_OR16_JMP        9 /* XXX special */
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#define R_OR16_INSN_REL_12  11  /* 12-bit insn relative */
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#define R_OR16_INSN_REL_26  12  /* 26-bit insn relative */
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/*
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NOTE:
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All the "I" forms refer to 29000 instruction formats.  The linker is
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expected to know how the numeric information is split and/or aligned
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within the instruction word(s).  R_BYTE works for instructions, too.
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If the parameter to a CONSTH instruction is a relocatable type, two
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relocation records are written.  The first has an r_type of R_IHIHALF
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(33 octal) and a normal r_vaddr and r_symndx.  The second relocation
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record has an r_type of R_IHCONST (34 octal), a normal r_vaddr (which
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is redundant), and an r_symndx containing the 32-bit constant offset
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to the relocation instead of the actual symbol table index.  This
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second record is always written, even if the constant offset is zero.
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The constant fields of the instruction are set to zero.
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*/
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/* Line number entry declaration and related definitions:  */
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struct external_lineno {
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   union {
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     char l_symndx[4];  /* function name symbol index, iff l_lnno == 0*/
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     char l_paddr[4];   /* (physical) address of line number    */
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   } l_addr;
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   char l_lnno[2];      /* line number    */
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};
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#define LINENO          struct external_lineno
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#define LINESZ          6                 /* sizeof (LINENO) */
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/* Symbol entry declaration and related definitions:  */
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#define E_SYMNMLEN      8         /* Number of characters in a symbol name */
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struct external_syment
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{
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  union {
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    char e_name[E_SYMNMLEN];
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    struct {
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      char e_zeroes[4];
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      char e_offset[4];
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    } e;
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  } e;
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  char e_value[4];
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  char e_scnum[2];
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  char e_type[2];
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  char e_sclass[1];
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  char e_numaux[1];
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};
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#define SYMENT  struct external_syment
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#define SYMESZ  18
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/* Storage class definitions - new classes for global registers:  */
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#define C_GLBLREG       19              /* global register */
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#define C_EXTREG        20              /* external global register */
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#define C_DEFREG        21              /* ext. def. of global register */
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/* Derived symbol mask/shifts:  */
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#define N_BTMASK        (0xf)
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#define N_BTSHFT        (4)
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#define N_TMASK         (0x30)
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#define N_TSHIFT        (2)
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/* Auxiliary symbol table entry declaration and related
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   definitions.  */
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#define E_FILNMLEN  14  /* # characters in a file name    */
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#define E_DIMNUM    4   /* # array dimensions in auxiliary entry */
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union external_auxent {
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  struct {
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    char x_tagndx[4];       /* str, un, or enum tag indx */
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    union {
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      struct {
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                    char  x_lnno[2];    /* declaration line number */
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        char  x_size[2];    /* str/union/array size */
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                        } x_lnsz;
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                        char x_fsize[4];      /* size of function */
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    } x_misc;
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    union {
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      struct {                    /* if ISFCN, tag, or .bb */
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                    char x_lnnoptr[4];  /* ptr to fcn line # */
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        char x_endndx[4];   /* entry ndx past block end */
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      } x_fcn;
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      struct {                    /* if ISARY, up to 4 dimen. */
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                    char x_dimen[E_DIMNUM][2];
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      } x_ary;
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    } x_fcnary;
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    char x_tvndx[2];        /* tv index */
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  } x_sym;
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  union {
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    char x_fname[E_FILNMLEN];
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    struct {
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      char x_zeroes[4];
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      char x_offset[4];
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    } x_n;
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  } x_file;
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  struct {
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    char x_scnlen[4];       /* section length */
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    char x_nreloc[2];       /* # relocation entries */
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    char x_nlinno[2];       /* # line numbers */
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  } x_scn;
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  struct {
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    char x_tvfill[4];       /* tv fill value */
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    char x_tvlen[2];        /* length of .tv */
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    char x_tvran[2][2];     /* tv range */
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  } x_tv;                   /* info about .tv section
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                               (in auxent of symbol .tv)) */
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};
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#define AUXENT          union external_auxent
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#define AUXESZ          18      

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