include/coff-mips.h

   1 /* Rudimentary ECOFF support on MIPS machines.
   2    This lacks symbol information, normally provided on MIPS Unix systems
   3    in the files <sym.h> and <symconst.h>.  */
   4
   5 /********************** FILE HEADER **********************/
   6
   7 struct external_filehdr {
   8         char f_magic[2];        /* magic number                 */
   9         char f_nscns[2];        /* number of sections           */
  10         char f_timdat[4];       /* time & date stamp            */
  11         char f_symptr[4];       /* file pointer to symtab       */
  12         char f_nsyms[4];        /* number of symtab entries     */
  13         char f_opthdr[2];       /* sizeof(optional hdr)         */
  14         char f_flags[2];        /* flags                        */
  15 };
  16
  17
  18 /* Mips magics */
  19 #define MIPS_MAGIC_1 0x0180
  20 #define MIPS_MAGIC_2 0x0162
  21 #define MIPS_MAGIC_3 0x0160
  22
  23 #define ECOFFBADMAG(x) (((x).f_magic!=MIPS_MAGIC_1) && \
  24                         ((x).f_magic!=MIPS_MAGIC_2) &&\
  25                         ((x).f_magic!=MIPS_MAGIC_3))
  26
  27
  28 #define FILHDR  struct external_filehdr
  29 #define FILHSZ  20
  30
  31 /********************** AOUT "OPTIONAL HEADER" **********************/
  32
  33
  34 typedef struct external_aouthdr
  35 {
  36   char  magic[2];               /* type of file                         */
  37   char  vstamp[2];              /* version stamp                        */
  38   char  tsize[4];               /* text size in bytes, padded to FW bdry*/
  39   char  dsize[4];               /* initialized data "  "                */
  40   char  bsize[4];               /* uninitialized data "   "             */
  41   char  entry[4];               /* entry pt.                            */
  42   char  text_start[4];          /* base of text used for this file */
  43   char  data_start[4];          /* base of data used for this file */
  44 } AOUTHDR;
  45
  46 /* compute size of a header */
  47
  48 #define AOUTSZ (sizeof(AOUTHDR))
  49
  50
  51 /********************** SECTION HEADER **********************/
  52
  53 struct external_scnhdr {
  54         char            s_name[8];      /* section name                 */
  55         char            s_paddr[4];     /* physical address, aliased s_nlib */
  56         char            s_vaddr[4];     /* virtual address              */
  57         char            s_size[4];      /* section size                 */
  58         char            s_scnptr[4];    /* file ptr to raw data for section */
  59         char            s_relptr[4];    /* file ptr to relocation       */
  60         char            s_lnnoptr[4];   /* file ptr to line numbers     */
  61         char            s_nreloc[2];    /* number of relocation entries */
  62         char            s_nlnno[2];     /* number of line number entries*/
  63         char            s_flags[4];     /* flags                        */
  64       };
  65
  66 #define SCNHDR  struct external_scnhdr
  67 #define SCNHSZ  sizeof(SCNHDR)
  68
  69 /*
  70  * names of "special" sections
  71  */
  72 #define _TEXT   ".text"
  73 #define _DATA   ".data"
  74 #define _BSS    ".bss"
  75
  76 #define DEFAULT_DATA_SECTION_ALIGNMENT 4
  77 #define DEFAULT_BSS_SECTION_ALIGNMENT 4
  78 #define DEFAULT_TEXT_SECTION_ALIGNMENT 16
  79 /* For new sections we havn't heard of before */
  80 #define DEFAULT_SECTION_ALIGNMENT 4
  81
  82 /********************** RELOCATION DIRECTIVES **********************/
  83
  84 struct external_reloc {
  85   char r_vaddr[4];
  86   char r_symndx[4];
  87   char r_type[2];
  88   char pad[2];
  89 };
  90
  91
  92 /* Relevent values for r_type and ecoff.  Would someone please document them */
  93
  94 #define RELOC struct external_reloc
  95 #define RELSZ 12