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[/] [or1k/] [branches/] [oc/] [gdb-5.0/] [include/] [coff/] [arm.h] - Blame information for rev 1765

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1 106 markom
/* ARM COFF support for BFD.
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   Copyright (C) 1998, 1999 Free Software Foundation, Inc.
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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 Foundation,
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   Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.  */
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#define COFFARM 1
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/********************** FILE HEADER **********************/
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struct external_filehdr
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{
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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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/* Bits for f_flags:
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 *      F_RELFLG        relocation info stripped from file
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 *      F_EXEC          file is executable (no unresolved external references)
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 *      F_LNNO          line numbers stripped from file
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 *      F_LSYMS         local symbols stripped from file
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 *      F_INTERWORK     file supports switching between ARM and Thumb instruction sets
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 *      F_INTERWORK_SET the F_INTERWORK bit is valid
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 *      F_APCS_FLOAT    code passes float arguments in float registers
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 *      F_PIC           code is reentrant/position-independent
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 *      F_AR32WR        file has byte ordering of an AR32WR machine (e.g. vax)
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 *      F_APCS_26       file uses 26 bit ARM Procedure Calling Standard
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 *      F_APCS_SET      the F_APCS_26, F_APCS_FLOAT and F_PIC bits have been initialised
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 *      F_SOFT_FLOAT    code does not use floating point instructions
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 */
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#define F_RELFLG        (0x0001)
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#define F_EXEC          (0x0002)
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#define F_LNNO          (0x0004)
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#define F_LSYMS         (0x0008)
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#define F_INTERWORK     (0x0010)
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#define F_INTERWORK_SET (0x0020)
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#define F_APCS_FLOAT    (0x0040)
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#undef  F_AR16WR
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#define F_PIC           (0x0080)
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#define F_AR32WR        (0x0100)
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#define F_APCS_26       (0x0400)
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#define F_APCS_SET      (0x0800)
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#define F_SOFT_FLOAT    (0x2000)
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/* Bits stored in flags field of the internal_f structure */
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#define F_INTERWORK     (0x0010)
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#define F_APCS_FLOAT    (0x0040)
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#define F_PIC           (0x0080)
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#define F_APCS26        (0x1000)
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#define F_ARM_ARCHITECTURE_MASK (0x4000+0x0800+0x0400)
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#define F_ARM_2         (0x0400)
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#define F_ARM_2a        (0x0800)
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#define F_ARM_3         (0x0c00)
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#define F_ARM_3M        (0x4000)
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#define F_ARM_4         (0x4400)
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#define F_ARM_4T        (0x4800)
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#define F_ARM_5         (0x4c00)
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/*
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 * ARMMAGIC ought to encoded the procesor type,
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 * but it is too late to change it now, instead
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 * the flags field of the internal_f structure
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 * is used as shown above.
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 *
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 * XXX - NC 5/6/97
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 */
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#define ARMMAGIC        0xa00  /* I just made this up */
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#define ARMBADMAG(x) (((x).f_magic != ARMMAGIC))
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#define ARMPEMAGIC      0x1c0
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#define THUMBPEMAGIC    0x1c2
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#undef  ARMBADMAG
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#define ARMBADMAG(x) (((x).f_magic != ARMMAGIC) && ((x).f_magic != ARMPEMAGIC) && ((x).f_magic != THUMBPEMAGIC))
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#define FILHDR  struct external_filehdr
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#define FILHSZ  20
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/********************** AOUT "OPTIONAL HEADER" **********************/
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typedef struct
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{
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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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}
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AOUTHDR;
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#define AOUTSZ 28
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#define AOUTHDRSZ 28
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#define OMAGIC          0404    /* object files, eg as output */
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#define ZMAGIC          0413    /* demand load format, eg normal ld output */
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#define STMAGIC         0401    /* target shlib */
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#define SHMAGIC         0443    /* host   shlib */
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/* define some NT default values */
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/*  #define NT_IMAGE_BASE        0x400000 moved to internal.h */
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#define NT_SECTION_ALIGNMENT 0x1000
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#define NT_FILE_ALIGNMENT    0x200  
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#define NT_DEF_RESERVE       0x100000
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#define NT_DEF_COMMIT        0x1000
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/********************** SECTION HEADER **********************/
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struct external_scnhdr
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{
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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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/*
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 * names of "special" sections
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 */
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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 _COMMENT ".comment"
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#define _LIB ".lib"
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/* We use the .rdata section to hold read only data.  */
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#define _LIT    ".rdata"
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/********************** LINE NUMBERS **********************/
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/* 1 line number entry for every "breakpointable" source line in a section.
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 * Line numbers are grouped on a per function basis; first entry in a function
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 * grouping will have l_lnno = 0 and in place of physical address will be the
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 * symbol table index of the function name.
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 */
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struct external_lineno
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{
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        union
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        {
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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
184
#define LINESZ  6
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/********************** SYMBOLS **********************/
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#define E_SYMNMLEN      8       /* # characters in a symbol name        */
190
#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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struct external_syment
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{
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  union
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  {
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    char e_name[E_SYMNMLEN];
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    struct
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    {
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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 N_BTMASK        (0xf)
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#define N_TMASK         (0x30)
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#define N_BTSHFT        (4)
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#define N_TSHIFT        (2)
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union external_auxent
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{
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        struct
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        {
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                char x_tagndx[4];       /* str, un, or enum tag indx */
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                union
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                {
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                        struct
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                        {
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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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                {
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                        struct                  /* if ISFCN, tag, or .bb */
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                        {
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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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                        {
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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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        {
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                char x_fname[E_FILNMLEN];
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                struct
249
                {
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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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        {
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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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                char x_checksum[4];     /* section COMDAT checksum */
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                char x_associated[2];   /* COMDAT associated section index */
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                char x_comdat[1];       /* COMDAT selection number */
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        } x_scn;
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        struct
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        {
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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 (in auxent of symbol .tv)) */
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};
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#define SYMENT  struct external_syment
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#define SYMESZ  18      
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#define AUXENT  union external_auxent
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#define AUXESZ  18
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278
#define _ETEXT  "etext"
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/********************** RELOCATION DIRECTIVES **********************/
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#ifdef ARM_WINCE
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struct external_reloc
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{
284
  char r_vaddr[4];
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  char r_symndx[4];
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  char r_type[2];
287
};
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#define RELOC struct external_reloc
290
#define RELSZ 10
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#else
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struct external_reloc
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{
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  char r_vaddr[4];
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  char r_symndx[4];
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  char r_type[2];
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  char r_offset[4];
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};
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#define RELOC struct external_reloc
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#define RELSZ 14
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#endif

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