linux/include/linux/som.h
<<
>>
Prefs
   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 */
  12struct 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
  69struct 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. */
  80struct 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 */
  97union name_pt {
  98        char *          n_name;
  99        unsigned int    n_strx;
 100};
 101
 102/* The Space Dictionary */
 103struct 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 */
 124struct 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 */
 155
lxr.linux.no kindly hosted by Redpill Linpro AS, provider of Linux consulting and operations services since 1995.