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[/] [openrisc/] [trunk/] [gnu-old/] [gdb-6.8/] [include/] [coff/] [rs6000.h] - Blame information for rev 826

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Line No. Rev Author Line
1 24 jeremybenn
/* IBM RS/6000 "XCOFF" file definitions for BFD.
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   Copyright (C) 1990, 1991, 2001 Free Software Foundation, Inc.
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   Written by Mimi Phuong-Thao Vo of IBM
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   and John Gilmore of Cygnus Support.  */
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/********************** FILE HEADER **********************/
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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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        /* IBM RS/6000 */
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#define U802WRMAGIC     0730    /* writeable text segments **chh**      */
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#define U802ROMAGIC     0735    /* readonly sharable text segments      */
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#define U802TOCMAGIC    0737    /* readonly text segments and TOC       */
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#define BADMAG(x)       \
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        ((x).f_magic != U802ROMAGIC && (x).f_magic != U802WRMAGIC && \
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         (x).f_magic != U802TOCMAGIC)
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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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  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 o_toc[4];       /* address of TOC */
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  unsigned char o_snentry[2];   /* section number of entry point */
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  unsigned char o_sntext[2];    /* section number of .text section */
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  unsigned char o_sndata[2];    /* section number of .data section */
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  unsigned char o_sntoc[2];     /* section number of TOC */
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  unsigned char o_snloader[2];  /* section number of .loader section */
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  unsigned char o_snbss[2];     /* section number of .bss section */
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  unsigned char o_algntext[2];  /* .text alignment */
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  unsigned char o_algndata[2];  /* .data alignment */
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  unsigned char o_modtype[2];   /* module type (??) */
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  unsigned char o_cputype[2];   /* cpu type */
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  unsigned char o_maxstack[4];  /* max stack size (??) */
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  unsigned char o_maxdata[4];   /* max data size (??) */
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  unsigned char o_resv2[12];    /* reserved */
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}
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AOUTHDR;
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#define AOUTSZ 72
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#define SMALL_AOUTSZ (28)
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#define AOUTHDRSZ 72
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/********************** SECTION HEADER **********************/
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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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/********************** 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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        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
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/********************** SYMBOLS **********************/
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#define E_SYMNMLEN      8       /* # characters in a symbol name        */
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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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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 N_BTMASK        (017)
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#define N_TMASK         (060)
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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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        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 (in auxent of symbol .tv)) */
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        struct {
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                unsigned char x_scnlen[4];
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                unsigned char x_parmhash[4];
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                unsigned char x_snhash[2];
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                unsigned char x_smtyp[1];
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                unsigned char x_smclas[1];
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                unsigned char x_stab[4];
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                unsigned char x_snstab[2];
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        } x_csect;
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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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#define DBXMASK 0x80            /* for dbx storage mask */
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#define SYMNAME_IN_DEBUG(symptr) ((symptr)->n_sclass & DBXMASK)
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/********************** RELOCATION DIRECTIVES **********************/
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struct external_reloc {
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  char r_vaddr[4];
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  char r_symndx[4];
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  char r_size[1];
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  char r_type[1];
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};
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#define RELOC struct external_reloc
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#define RELSZ 10
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#define DEFAULT_DATA_SECTION_ALIGNMENT 4
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#define DEFAULT_BSS_SECTION_ALIGNMENT 4
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#define DEFAULT_TEXT_SECTION_ALIGNMENT 4
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/* For new sections we havn't heard of before */
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#define DEFAULT_SECTION_ALIGNMENT 4
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/* The ldhdr structure.  This appears at the start of the .loader
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   section.  */
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struct external_ldhdr
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{
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  bfd_byte l_version[4];
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  bfd_byte l_nsyms[4];
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  bfd_byte l_nreloc[4];
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  bfd_byte l_istlen[4];
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  bfd_byte l_nimpid[4];
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  bfd_byte l_impoff[4];
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  bfd_byte l_stlen[4];
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  bfd_byte l_stoff[4];
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};
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#define LDHDRSZ (8 * 4)
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struct external_ldsym
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{
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  union
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    {
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      bfd_byte _l_name[SYMNMLEN];
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      struct
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        {
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          bfd_byte _l_zeroes[4];
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          bfd_byte _l_offset[4];
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        } _l_l;
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    } _l;
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  bfd_byte l_value[4];
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  bfd_byte l_scnum[2];
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  bfd_byte l_smtype[1];
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  bfd_byte l_smclas[1];
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  bfd_byte l_ifile[4];
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  bfd_byte l_parm[4];
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};
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#define LDSYMSZ (8 + 3 * 4 + 2 + 2)
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struct external_ldrel
256
{
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  bfd_byte l_vaddr[4];
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  bfd_byte l_symndx[4];
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  bfd_byte l_rtype[2];
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  bfd_byte l_rsecnm[2];
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};
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#define LDRELSZ (2 * 4 + 2 * 2)

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