File: /usr/src/linux/include/linux/personality.h
1 #ifndef _LINUX_PERSONALITY_H
2 #define _LINUX_PERSONALITY_H
3
4 /*
5 * Handling of different ABIs (personalities).
6 */
7
8 struct exec_domain;
9 struct pt_regs;
10
11 extern int register_exec_domain(struct exec_domain *);
12 extern int unregister_exec_domain(struct exec_domain *);
13 extern int __set_personality(unsigned long);
14
15
16 /*
17 * Sysctl variables related to binary emulation.
18 */
19 extern unsigned long abi_defhandler_coff;
20 extern unsigned long abi_defhandler_elf;
21 extern unsigned long abi_defhandler_lcall7;
22 extern unsigned long abi_defhandler_libcso;
23 extern int abi_fake_utsname;
24
25
26 /*
27 * Flags for bug emulation.
28 *
29 * These occupy the top three bytes.
30 */
31 enum {
32 MMAP_PAGE_ZERO = 0x0100000,
33 ADDR_LIMIT_32BIT = 0x0800000,
34 SHORT_INODE = 0x1000000,
35 WHOLE_SECONDS = 0x2000000,
36 STICKY_TIMEOUTS = 0x4000000,
37 };
38
39 /*
40 * Personality types.
41 *
42 * These go in the low byte. Avoid using the top bit, it will
43 * conflict with error returns.
44 */
45 enum {
46 PER_LINUX = 0x0000,
47 PER_LINUX_32BIT = 0x0000 | ADDR_LIMIT_32BIT,
48 PER_SVR4 = 0x0001 | STICKY_TIMEOUTS | MMAP_PAGE_ZERO,
49 PER_SVR3 = 0x0002 | STICKY_TIMEOUTS | SHORT_INODE,
50 PER_SCOSVR3 = 0x0003 | STICKY_TIMEOUTS |
51 WHOLE_SECONDS | SHORT_INODE,
52 PER_OSR5 = 0x0003 | STICKY_TIMEOUTS | WHOLE_SECONDS,
53 PER_WYSEV386 = 0x0004 | STICKY_TIMEOUTS | SHORT_INODE,
54 PER_ISCR4 = 0x0005 | STICKY_TIMEOUTS,
55 PER_BSD = 0x0006,
56 PER_SUNOS = 0x0006 | STICKY_TIMEOUTS,
57 PER_XENIX = 0x0007 | STICKY_TIMEOUTS | SHORT_INODE,
58 PER_LINUX32 = 0x0008,
59 PER_IRIX32 = 0x0009 | STICKY_TIMEOUTS,/* IRIX5 32-bit */
60 PER_IRIXN32 = 0x000a | STICKY_TIMEOUTS,/* IRIX6 new 32-bit */
61 PER_IRIX64 = 0x000b | STICKY_TIMEOUTS,/* IRIX6 64-bit */
62 PER_RISCOS = 0x000c,
63 PER_SOLARIS = 0x000d | STICKY_TIMEOUTS,
64 PER_UW7 = 0x000e | STICKY_TIMEOUTS | MMAP_PAGE_ZERO,
65 PER_MASK = 0x00ff,
66 };
67
68
69 /*
70 * Description of an execution domain.
71 *
72 * The first two members are refernced from assembly source
73 * and should stay where they are unless explicitly needed.
74 */
75 typedef void (*handler_t)(int, struct pt_regs *);
76
77 struct exec_domain {
78 const char *name; /* name of the execdomain */
79 handler_t handler; /* handler for syscalls */
80 unsigned char pers_low; /* lowest personality */
81 unsigned char pers_high; /* highest personality */
82 unsigned long *signal_map; /* signal mapping */
83 unsigned long *signal_invmap; /* reverse signal mapping */
84 struct map_segment *err_map; /* error mapping */
85 struct map_segment *socktype_map; /* socket type mapping */
86 struct map_segment *sockopt_map; /* socket option mapping */
87 struct map_segment *af_map; /* address family mapping */
88 struct module *module; /* module context of the ed. */
89 struct exec_domain *next; /* linked list (internal) */
90 };
91
92 /*
93 * Return the base personality without flags.
94 */
95 #define personality(pers) (pers & PER_MASK)
96
97 /*
98 * Personality of the currently running process.
99 */
100 #define get_personality (current->personality)
101
102 /*
103 * Change personality of the currently running process.
104 */
105 #define set_personality(pers) \
106 ((current->personality == pers) ? 0 : __set_personality(pers))
107
108 /*
109 * Load an execution domain.
110 */
111 #define get_exec_domain(ep) \
112 do { \
113 if (ep != NULL && ep->module != NULL) \
114 __MOD_INC_USE_COUNT(ep->module); \
115 } while (0)
116
117 /*
118 * Unload an execution domain.
119 */
120 #define put_exec_domain(ep) \
121 do { \
122 if (ep != NULL && ep->module != NULL) \
123 __MOD_DEC_USE_COUNT(ep->module); \
124 } while (0)
125
126 #endif /* _LINUX_PERSONALITY_H */
127