155 lines
5.4 KiB
C
155 lines
5.4 KiB
C
#ifndef _LINUX_SOM_H
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#define _LINUX_SOM_H
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/* File format definition for SOM executables / shared libraries */
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/* we need struct timespec */
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#include <linux/time.h>
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#define SOM_PAGESIZE 4096
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/* this is the SOM header */
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struct som_hdr {
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short system_id; /* magic number - system */
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short a_magic; /* magic number - file type */
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unsigned int version_id; /* versiod ID: YYMMDDHH */
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struct timespec file_time; /* system clock */
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unsigned int entry_space; /* space for entry point */
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unsigned int entry_subspace; /* subspace for entry point */
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unsigned int entry_offset; /* offset of entry point */
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unsigned int aux_header_location; /* auxiliary header location */
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unsigned int aux_header_size; /* auxiliary header size */
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unsigned int som_length; /* length of entire SOM */
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unsigned int presumed_dp; /* compiler's DP value */
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unsigned int space_location; /* space dictionary location */
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unsigned int space_total; /* number of space entries */
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unsigned int subspace_location; /* subspace entries location */
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unsigned int subspace_total; /* number of subspace entries */
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unsigned int loader_fixup_location; /* MPE/iX loader fixup */
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unsigned int loader_fixup_total; /* number of fixup records */
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unsigned int space_strings_location; /* (sub)space names */
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unsigned int space_strings_size; /* size of strings area */
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unsigned int init_array_location; /* reserved */
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unsigned int init_array_total; /* reserved */
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unsigned int compiler_location; /* module dictionary */
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unsigned int compiler_total; /* number of modules */
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unsigned int symbol_location; /* symbol dictionary */
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unsigned int symbol_total; /* number of symbols */
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unsigned int fixup_request_location; /* fixup requests */
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unsigned int fixup_request_total; /* number of fixup requests */
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unsigned int symbol_strings_location;/* module & symbol names area */
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unsigned int symbol_strings_size; /* size of strings area */
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unsigned int unloadable_sp_location; /* unloadable spaces location */
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unsigned int unloadable_sp_size; /* size of data */
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unsigned int checksum;
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};
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/* values for system_id */
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#define SOM_SID_PARISC_1_0 0x020b
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#define SOM_SID_PARISC_1_1 0x0210
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#define SOM_SID_PARISC_2_0 0x0214
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/* values for a_magic */
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#define SOM_LIB_EXEC 0x0104
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#define SOM_RELOCATABLE 0x0106
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#define SOM_EXEC_NONSHARE 0x0107
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#define SOM_EXEC_SHARE 0x0108
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#define SOM_EXEC_DEMAND 0x010B
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#define SOM_LIB_DYN 0x010D
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#define SOM_LIB_SHARE 0x010E
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#define SOM_LIB_RELOC 0x0619
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/* values for version_id. Decimal not hex, yes. Grr. */
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#define SOM_ID_OLD 85082112
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#define SOM_ID_NEW 87102412
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struct aux_id {
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unsigned int mandatory :1; /* the linker must understand this */
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unsigned int copy :1; /* Must be copied by the linker */
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unsigned int append :1; /* Must be merged by the linker */
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unsigned int ignore :1; /* Discard section if unknown */
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unsigned int reserved :12;
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unsigned int type :16; /* Header type */
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unsigned int length; /* length of _following_ data */
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};
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/* The Exec Auxiliary Header. Called The HP-UX Header within HP apparently. */
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struct som_exec_auxhdr {
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struct aux_id som_auxhdr;
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int exec_tsize; /* Text size in bytes */
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int exec_tmem; /* Address to load text at */
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int exec_tfile; /* Location of text in file */
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int exec_dsize; /* Data size in bytes */
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int exec_dmem; /* Address to load data at */
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int exec_dfile; /* Location of data in file */
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int exec_bsize; /* Uninitialised data (bss) */
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int exec_entry; /* Address to start executing */
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int exec_flags; /* loader flags */
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int exec_bfill; /* initialisation value for bss */
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};
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/* Oh, the things people do to avoid casts. Shame it'll break with gcc's
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* new aliasing rules really.
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*/
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union name_pt {
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char * n_name;
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unsigned int n_strx;
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};
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/* The Space Dictionary */
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struct space_dictionary_record {
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union name_pt name; /* index to subspace name */
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unsigned int is_loadable :1; /* loadable */
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unsigned int is_defined :1; /* defined within file */
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unsigned int is_private :1; /* not sharable */
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unsigned int has_intermediate_code :1; /* contains intermediate code */
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unsigned int is_tspecific :1; /* thread specific */
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unsigned int reserved :11; /* for future expansion */
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unsigned int sort_key :8; /* for linker */
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unsigned int reserved2 :8; /* for future expansion */
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int space_number; /* index */
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int subspace_index; /* index into subspace dict */
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unsigned int subspace_quantity; /* number of subspaces */
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int loader_fix_index; /* for loader */
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unsigned int loader_fix_quantity; /* for loader */
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int init_pointer_index; /* data pointer array index */
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unsigned int init_pointer_quantity; /* number of data pointers */
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};
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/* The Subspace Dictionary */
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struct subspace_dictionary_record {
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int space_index;
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unsigned int access_control_bits :7;
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unsigned int memory_resident :1;
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unsigned int dup_common :1;
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unsigned int is_common :1;
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unsigned int quadrant :2;
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unsigned int initially_frozen :1;
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unsigned int is_first :1;
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unsigned int code_only :1;
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unsigned int sort_key :8;
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unsigned int replicate_init :1;
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unsigned int continuation :1;
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unsigned int is_tspecific :1;
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unsigned int is_comdat :1;
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unsigned int reserved :4;
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int file_loc_init_value;
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unsigned int initialization_length;
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unsigned int subspace_start;
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unsigned int subspace_length;
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unsigned int reserved2 :5;
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unsigned int alignment :27;
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union name_pt name;
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int fixup_request_index;
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unsigned int fixup_request_quantity;
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};
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#endif /* _LINUX_SOM_H */
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