summaryrefslogtreecommitdiffstats
path: root/include/uapi/linux/som.h
blob: 166594e4e7be8e25150ebd6c23f94a264f9c0e38 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
#ifndef _LINUX_SOM_H
#define _LINUX_SOM_H

/* File format definition for SOM executables / shared libraries */

/* we need struct timespec */
#include <linux/time.h>

#define SOM_PAGESIZE 4096

/* this is the SOM header */
struct som_hdr {
	short		system_id;		/* magic number - system */
	short		a_magic;		/* magic number - file type */
	unsigned int	version_id;		/* versiod ID: YYMMDDHH */
	struct timespec	file_time;		/* system clock */
	unsigned int	entry_space;		/* space for entry point */
	unsigned int	entry_subspace;		/* subspace for entry point */
	unsigned int	entry_offset;		/* offset of entry point */
	unsigned int	aux_header_location;	/* auxiliary header location */
	unsigned int	aux_header_size;	/* auxiliary header size */
	unsigned int	som_length;		/* length of entire SOM */
	unsigned int	presumed_dp;		/* compiler's DP value */
	unsigned int	space_location;		/* space dictionary location */
	unsigned int	space_total;		/* number of space entries */
	unsigned int	subspace_location;	/* subspace entries location */
	unsigned int	subspace_total;		/* number of subspace entries */
	unsigned int	loader_fixup_location;	/* MPE/iX loader fixup */
	unsigned int	loader_fixup_total;	/* number of fixup records */
	unsigned int	space_strings_location;	/* (sub)space names */
	unsigned int	space_strings_size;	/* size of strings area */
	unsigned int	init_array_location;	/* reserved */
	unsigned int	init_array_total;	/* reserved */
	unsigned int	compiler_location;	/* module dictionary */
	unsigned int	compiler_total;		/* number of modules */
	unsigned int	symbol_location;	/* symbol dictionary */
	unsigned int	symbol_total;		/* number of symbols */
	unsigned int	fixup_request_location;	/* fixup requests */
	unsigned int	fixup_request_total;	/* number of fixup requests */
	unsigned int	symbol_strings_location;/* module & symbol names area */
	unsigned int	symbol_strings_size;	/* size of strings area */
	unsigned int	unloadable_sp_location;	/* unloadable spaces location */
	unsigned int	unloadable_sp_size;	/* size of data */
	unsigned int	checksum;
};

/* values for system_id */

#define SOM_SID_PARISC_1_0	0x020b
#define SOM_SID_PARISC_1_1	0x0210
#define SOM_SID_PARISC_2_0	0x0214

/* values for a_magic */

#define SOM_LIB_EXEC		0x0104
#define SOM_RELOCATABLE		0x0106
#define SOM_EXEC_NONSHARE	0x0107
#define SOM_EXEC_SHARE		0x0108
#define SOM_EXEC_DEMAND		0x010B
#define SOM_LIB_DYN		0x010D
#define SOM_LIB_SHARE		0x010E
#define SOM_LIB_RELOC		0x0619

/* values for version_id.  Decimal not hex, yes.  Grr. */

#define SOM_ID_OLD		85082112
#define SOM_ID_NEW		87102412

struct aux_id {
	unsigned int	mandatory :1;	/* the linker must understand this */
	unsigned int	copy	  :1;	/* Must be copied by the linker */
	unsigned int	append	  :1;	/* Must be merged by the linker */
	unsigned int	ignore	  :1;	/* Discard section if unknown */
	unsigned int	reserved  :12;
	unsigned int	type	  :16;	/* Header type */
	unsigned int	length;		/* length of _following_ data */
};

/* The Exec Auxiliary Header.  Called The HP-UX Header within HP apparently. */
struct som_exec_auxhdr {
	struct aux_id	som_auxhdr;
	int		exec_tsize;	/* Text size in bytes */
	int		exec_tmem;	/* Address to load text at */
	int		exec_tfile;	/* Location of text in file */
	int		exec_dsize;	/* Data size in bytes */
	int		exec_dmem;	/* Address to load data at */
	int		exec_dfile;	/* Location of data in file */
	int		exec_bsize;	/* Uninitialised data (bss) */
	int		exec_entry;	/* Address to start executing */
	int		exec_flags;	/* loader flags */
	int		exec_bfill;	/* initialisation value for bss */
};

/* Oh, the things people do to avoid casts.  Shame it'll break with gcc's
 * new aliasing rules really.
 */
union name_pt {
	char *		n_name;
	unsigned int	n_strx;
};

/* The Space Dictionary */
struct space_dictionary_record {
	union name_pt	name;			/* index to subspace name */
	unsigned int	is_loadable	:1;	/* loadable */
	unsigned int	is_defined	:1;	/* defined within file */
	unsigned int	is_private	:1;	/* not sharable */
	unsigned int	has_intermediate_code :1; /* contains intermediate code */
	unsigned int	is_tspecific	:1;	/* thread specific */
	unsigned int	reserved	:11;	/* for future expansion */
	unsigned int	sort_key	:8;	/* for linker */
	unsigned int	reserved2	:8;	/* for future expansion */

	int		space_number;		/* index */
	int		subspace_index;		/* index into subspace dict */
	unsigned int	subspace_quantity;	/* number of subspaces */
	int		loader_fix_index;	/* for loader */
	unsigned int	loader_fix_quantity;	/* for loader */
	int		init_pointer_index;	/* data pointer array index */
	unsigned int	init_pointer_quantity;	/* number of data pointers */
};

/* The Subspace Dictionary */
struct subspace_dictionary_record {
	int		space_index;
	unsigned int	access_control_bits :7;
	unsigned int	memory_resident	:1;
	unsigned int	dup_common	:1;
	unsigned int	is_common	:1;
	unsigned int	quadrant	:2;
	unsigned int	initially_frozen :1;
	unsigned int	is_first	:1;
	unsigned int	code_only	:1;
	unsigned int	sort_key	:8;
	unsigned int	replicate_init	:1;
	unsigned int	continuation	:1;
	unsigned int	is_tspecific	:1;
	unsigned int	is_comdat	:1;
	unsigned int	reserved	:4;

	int		file_loc_init_value;
	unsigned int	initialization_length;
	unsigned int	subspace_start;
	unsigned int	subspace_length;

	unsigned int	reserved2	:5;
	unsigned int	alignment	:27;

	union name_pt	name;
	int		fixup_request_index;
	unsigned int	fixup_request_quantity;
};

#endif /* _LINUX_SOM_H */