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