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 */