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Linus Torvalds1da177e2005-04-16 15:20:36 -07001#ifndef _LINUX_PERSONALITY_H
2#define _LINUX_PERSONALITY_H
3
Ralf Baechle34e856e2006-10-19 23:28:17 -07004#ifdef __KERNEL__
5
Linus Torvalds1da177e2005-04-16 15:20:36 -07006/*
7 * Handling of different ABIs (personalities).
8 */
9
10struct exec_domain;
11struct pt_regs;
12
13extern int register_exec_domain(struct exec_domain *);
14extern int unregister_exec_domain(struct exec_domain *);
15extern int __set_personality(unsigned long);
16
Ralf Baechle34e856e2006-10-19 23:28:17 -070017#endif /* __KERNEL__ */
18
Linus Torvalds1da177e2005-04-16 15:20:36 -070019/*
20 * Flags for bug emulation.
21 *
22 * These occupy the top three bytes.
23 */
24enum {
25 ADDR_NO_RANDOMIZE = 0x0040000, /* disable randomization of VA space */
26 FDPIC_FUNCPTRS = 0x0080000, /* userspace function ptrs point to descriptors
27 * (signal handling)
28 */
29 MMAP_PAGE_ZERO = 0x0100000,
30 ADDR_COMPAT_LAYOUT = 0x0200000,
31 READ_IMPLIES_EXEC = 0x0400000,
32 ADDR_LIMIT_32BIT = 0x0800000,
33 SHORT_INODE = 0x1000000,
34 WHOLE_SECONDS = 0x2000000,
35 STICKY_TIMEOUTS = 0x4000000,
36 ADDR_LIMIT_3GB = 0x8000000,
37};
38
39/*
40 * Security-relevant compatibility flags that must be
41 * cleared upon setuid or setgid exec:
42 */
43#define PER_CLEAR_ON_SETID (READ_IMPLIES_EXEC|ADDR_NO_RANDOMIZE)
44
45/*
46 * Personality types.
47 *
48 * These go in the low byte. Avoid using the top bit, it will
49 * conflict with error returns.
50 */
51enum {
52 PER_LINUX = 0x0000,
53 PER_LINUX_32BIT = 0x0000 | ADDR_LIMIT_32BIT,
54 PER_LINUX_FDPIC = 0x0000 | FDPIC_FUNCPTRS,
55 PER_SVR4 = 0x0001 | STICKY_TIMEOUTS | MMAP_PAGE_ZERO,
56 PER_SVR3 = 0x0002 | STICKY_TIMEOUTS | SHORT_INODE,
57 PER_SCOSVR3 = 0x0003 | STICKY_TIMEOUTS |
58 WHOLE_SECONDS | SHORT_INODE,
59 PER_OSR5 = 0x0003 | STICKY_TIMEOUTS | WHOLE_SECONDS,
60 PER_WYSEV386 = 0x0004 | STICKY_TIMEOUTS | SHORT_INODE,
61 PER_ISCR4 = 0x0005 | STICKY_TIMEOUTS,
62 PER_BSD = 0x0006,
63 PER_SUNOS = 0x0006 | STICKY_TIMEOUTS,
64 PER_XENIX = 0x0007 | STICKY_TIMEOUTS | SHORT_INODE,
65 PER_LINUX32 = 0x0008,
66 PER_LINUX32_3GB = 0x0008 | ADDR_LIMIT_3GB,
67 PER_IRIX32 = 0x0009 | STICKY_TIMEOUTS,/* IRIX5 32-bit */
68 PER_IRIXN32 = 0x000a | STICKY_TIMEOUTS,/* IRIX6 new 32-bit */
69 PER_IRIX64 = 0x000b | STICKY_TIMEOUTS,/* IRIX6 64-bit */
70 PER_RISCOS = 0x000c,
71 PER_SOLARIS = 0x000d | STICKY_TIMEOUTS,
72 PER_UW7 = 0x000e | STICKY_TIMEOUTS | MMAP_PAGE_ZERO,
73 PER_OSF4 = 0x000f, /* OSF/1 v4 */
74 PER_HPUX = 0x0010,
75 PER_MASK = 0x00ff,
76};
77
Ralf Baechle34e856e2006-10-19 23:28:17 -070078#ifdef __KERNEL__
Linus Torvalds1da177e2005-04-16 15:20:36 -070079
80/*
81 * Description of an execution domain.
82 *
83 * The first two members are refernced from assembly source
84 * and should stay where they are unless explicitly needed.
85 */
86typedef void (*handler_t)(int, struct pt_regs *);
87
88struct exec_domain {
89 const char *name; /* name of the execdomain */
90 handler_t handler; /* handler for syscalls */
91 unsigned char pers_low; /* lowest personality */
92 unsigned char pers_high; /* highest personality */
93 unsigned long *signal_map; /* signal mapping */
94 unsigned long *signal_invmap; /* reverse signal mapping */
95 struct map_segment *err_map; /* error mapping */
96 struct map_segment *socktype_map; /* socket type mapping */
97 struct map_segment *sockopt_map; /* socket option mapping */
98 struct map_segment *af_map; /* address family mapping */
99 struct module *module; /* module context of the ed. */
100 struct exec_domain *next; /* linked list (internal) */
101};
102
103/*
104 * Return the base personality without flags.
105 */
106#define personality(pers) (pers & PER_MASK)
107
108/*
109 * Personality of the currently running process.
110 */
111#define get_personality (current->personality)
112
113/*
114 * Change personality of the currently running process.
115 */
116#define set_personality(pers) \
Russell Kingd8b295f2006-11-10 12:27:53 -0800117 ((current->personality == (pers)) ? 0 : __set_personality(pers))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700118
Ralf Baechle34e856e2006-10-19 23:28:17 -0700119#endif /* __KERNEL__ */
120
Linus Torvalds1da177e2005-04-16 15:20:36 -0700121#endif /* _LINUX_PERSONALITY_H */