include/linux/som.h

   1 #ifndef _LINUX_SOM_H
   2 #define _LINUX_SOM_H
   3
   4 /* File format definition for SOM executables / shared libraries */
   5
   6 /* we need struct timespec */
   7 #include <linux/time.h>
   8
   9 #define SOM_PAGESIZE 4096
  10
  11 /* this is the SOM header */
  12 struct som_hdr {
  13         short           system_id;              /* magic number - system */
  14         short           a_magic;                /* magic number - file type */
  15         unsigned int    version_id;             /* versiod ID: YYMMDDHH */
  16         struct timespec file_time;              /* system clock */
  17         unsigned int    entry_space;            /* space for entry point */
  18         unsigned int    entry_subspace;         /* subspace for entry point */
  19         unsigned int    entry_offset;           /* offset of entry point */
  20         unsigned int    aux_header_location;    /* auxiliary header location */
  21         unsigned int    aux_header_size;        /* auxiliary header size */
  22         unsigned int    som_length;             /* length of entire SOM */
  23         unsigned int    presumed_dp;            /* compiler's DP value */
  24         unsigned int    space_location;         /* space dictionary location */
  25         unsigned int    space_total;            /* number of space entries */
  26         unsigned int    subspace_location;      /* subspace entries location */
  27         unsigned int    subspace_total;         /* number of subspace entries */
  28         unsigned int    loader_fixup_location;  /* MPE/iX loader fixup */
  29         unsigned int    loader_fixup_total;     /* number of fixup records */
  30         unsigned int    space_strings_location; /* (sub)space names */
  31         unsigned int    space_strings_size;     /* size of strings area */
  32         unsigned int    init_array_location;    /* reserved */
  33         unsigned int    init_array_total;       /* reserved */
  34         unsigned int    compiler_location;      /* module dictionary */
  35         unsigned int    compiler_total;         /* number of modules */
  36         unsigned int    symbol_location;        /* symbol dictionary */
  37         unsigned int    symbol_total;           /* number of symbols */
  38         unsigned int    fixup_request_location; /* fixup requests */
  39         unsigned int    fixup_request_total;    /* number of fixup requests */
  40         unsigned int    symbol_strings_location;/* module & symbol names area */
  41         unsigned int    symbol_strings_size;    /* size of strings area */
  42         unsigned int    unloadable_sp_location; /* unloadable spaces location */
  43         unsigned int    unloadable_sp_size;     /* size of data */
  44         unsigned int    checksum;
  45 };
  46
  47 /* values for system_id */
  48
  49 #define SOM_SID_PARISC_1_0      0x020b
  50 #define SOM_SID_PARISC_1_1      0x0210
  51 #define SOM_SID_PARISC_2_0      0x0214
  52
  53 /* values for a_magic */
  54
  55 #define SOM_LIB_EXEC            0x0104
  56 #define SOM_RELOCATABLE         0x0106
  57 #define SOM_EXEC_NONSHARE       0x0107
  58 #define SOM_EXEC_SHARE          0x0108
  59 #define SOM_EXEC_DEMAND         0x010B
  60 #define SOM_LIB_DYN             0x010D
  61 #define SOM_LIB_SHARE           0x010E
  62 #define SOM_LIB_RELOC           0x0619
  63
  64 /* values for version_id.  Decimal not hex, yes.  Grr. */
  65
  66 #define SOM_ID_OLD              85082112
  67 #define SOM_ID_NEW              87102412
  68
  69 struct aux_id {
  70         unsigned int    mandatory :1;   /* the linker must understand this */
  71         unsigned int    copy      :1;   /* Must be copied by the linker */
  72         unsigned int    append    :1;   /* Must be merged by the linker */
  73         unsigned int    ignore    :1;   /* Discard section if unknown */
  74         unsigned int    reserved  :12;
  75         unsigned int    type      :16;  /* Header type */
  76         unsigned int    length;         /* length of _following_ data */
  77 };
  78
  79 /* The Exec Auxiliary Header.  Called The HP-UX Header within HP apparently. */
  80 struct som_exec_auxhdr {
  81         struct aux_id   som_auxhdr;
  82         int             exec_tsize;     /* Text size in bytes */
  83         int             exec_tmem;      /* Address to load text at */
  84         int             exec_tfile;     /* Location of text in file */
  85         int             exec_dsize;     /* Data size in bytes */
  86         int             exec_dmem;      /* Address to load data at */
  87         int             exec_dfile;     /* Location of data in file */
  88         int             exec_bsize;     /* Uninitialised data (bss) */
  89         int             exec_entry;     /* Address to start executing */
  90         int             exec_flags;     /* loader flags */
  91         int             exec_bfill;     /* initialisation value for bss */
  92 };
  93
  94 /* Oh, the things people do to avoid casts.  Shame it'll break with gcc's
  95  * new aliasing rules really.
  96  */
  97 union name_pt {
  98         char *          n_name;
  99         unsigned int    n_strx;
 100 };
 101
 102 /* The Space Dictionary */
 103 struct space_dictionary_record {
 104         union name_pt   name;                   /* index to subspace name */
 105         unsigned int    is_loadable     :1;     /* loadable */
 106         unsigned int    is_defined      :1;     /* defined within file */
 107         unsigned int    is_private      :1;     /* not sharable */
 108         unsigned int    has_intermediate_code :1; /* contains intermediate code */
 109         unsigned int    is_tspecific    :1;     /* thread specific */
 110         unsigned int    reserved        :11;    /* for future expansion */
 111         unsigned int    sort_key        :8;     /* for linker */
 112         unsigned int    reserved2       :8;     /* for future expansion */
 113
 114         int             space_number;           /* index */
 115         int             subspace_index;         /* index into subspace dict */
 116         unsigned int    subspace_quantity;      /* number of subspaces */
 117         int             loader_fix_index;       /* for loader */
 118         unsigned int    loader_fix_quantity;    /* for loader */
 119         int             init_pointer_index;     /* data pointer array index */
 120         unsigned int    init_pointer_quantity;  /* number of data pointers */
 121 };
 122
 123 /* The Subspace Dictionary */
 124 struct subspace_dictionary_record {
 125         int             space_index;
 126         unsigned int    access_control_bits :7;
 127         unsigned int    memory_resident :1;
 128         unsigned int    dup_common      :1;
 129         unsigned int    is_common       :1;
 130         unsigned int    quadrant        :2;
 131         unsigned int    initially_frozen :1;
 132         unsigned int    is_first        :1;
 133         unsigned int    code_only       :1;
 134         unsigned int    sort_key        :8;
 135         unsigned int    replicate_init  :1;
 136         unsigned int    continuation    :1;
 137         unsigned int    is_tspecific    :1;
 138         unsigned int    is_comdat       :1;
 139         unsigned int    reserved        :4;
 140
 141         int             file_loc_init_value;
 142         unsigned int    initialization_length;
 143         unsigned int    subspace_start;
 144         unsigned int    subspace_length;
 145
 146         unsigned int    reserved2       :5;
 147         unsigned int    alignment       :27;
 148
 149         union name_pt   name;
 150         int             fixup_request_index;
 151         unsigned int    fixup_request_quantity;
 152 };
 153
 154 #endif /* _LINUX_SOM_H */