blob: 8fc7dd1a57ff29cb96722a01290f07de6dd1d23a [file] [log] [blame]
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 *);
Oleg Nesterov485d5272010-06-04 14:14:58 -070015extern int __set_personality(unsigned int);
Linus Torvalds1da177e2005-04-16 15:20:36 -070016
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 {
Andi Kleenbe274252011-08-19 16:15:10 -070025 UNAME26 = 0x0020000,
Linus Torvalds1da177e2005-04-16 15:20:36 -070026 ADDR_NO_RANDOMIZE = 0x0040000, /* disable randomization of VA space */
27 FDPIC_FUNCPTRS = 0x0080000, /* userspace function ptrs point to descriptors
28 * (signal handling)
29 */
30 MMAP_PAGE_ZERO = 0x0100000,
31 ADDR_COMPAT_LAYOUT = 0x0200000,
32 READ_IMPLIES_EXEC = 0x0400000,
33 ADDR_LIMIT_32BIT = 0x0800000,
34 SHORT_INODE = 0x1000000,
35 WHOLE_SECONDS = 0x2000000,
36 STICKY_TIMEOUTS = 0x4000000,
37 ADDR_LIMIT_3GB = 0x8000000,
38};
39
40/*
41 * Security-relevant compatibility flags that must be
42 * cleared upon setuid or setgid exec:
43 */
Julien Tinnesf9fabcb2009-06-26 20:27:40 +020044#define PER_CLEAR_ON_SETID (READ_IMPLIES_EXEC | \
45 ADDR_NO_RANDOMIZE | \
46 ADDR_COMPAT_LAYOUT | \
47 MMAP_PAGE_ZERO)
Linus Torvalds1da177e2005-04-16 15:20:36 -070048
49/*
50 * Personality types.
51 *
52 * These go in the low byte. Avoid using the top bit, it will
53 * conflict with error returns.
54 */
55enum {
56 PER_LINUX = 0x0000,
57 PER_LINUX_32BIT = 0x0000 | ADDR_LIMIT_32BIT,
58 PER_LINUX_FDPIC = 0x0000 | FDPIC_FUNCPTRS,
59 PER_SVR4 = 0x0001 | STICKY_TIMEOUTS | MMAP_PAGE_ZERO,
60 PER_SVR3 = 0x0002 | STICKY_TIMEOUTS | SHORT_INODE,
61 PER_SCOSVR3 = 0x0003 | STICKY_TIMEOUTS |
62 WHOLE_SECONDS | SHORT_INODE,
63 PER_OSR5 = 0x0003 | STICKY_TIMEOUTS | WHOLE_SECONDS,
64 PER_WYSEV386 = 0x0004 | STICKY_TIMEOUTS | SHORT_INODE,
65 PER_ISCR4 = 0x0005 | STICKY_TIMEOUTS,
66 PER_BSD = 0x0006,
67 PER_SUNOS = 0x0006 | STICKY_TIMEOUTS,
68 PER_XENIX = 0x0007 | STICKY_TIMEOUTS | SHORT_INODE,
69 PER_LINUX32 = 0x0008,
70 PER_LINUX32_3GB = 0x0008 | ADDR_LIMIT_3GB,
71 PER_IRIX32 = 0x0009 | STICKY_TIMEOUTS,/* IRIX5 32-bit */
72 PER_IRIXN32 = 0x000a | STICKY_TIMEOUTS,/* IRIX6 new 32-bit */
73 PER_IRIX64 = 0x000b | STICKY_TIMEOUTS,/* IRIX6 64-bit */
74 PER_RISCOS = 0x000c,
75 PER_SOLARIS = 0x000d | STICKY_TIMEOUTS,
76 PER_UW7 = 0x000e | STICKY_TIMEOUTS | MMAP_PAGE_ZERO,
77 PER_OSF4 = 0x000f, /* OSF/1 v4 */
78 PER_HPUX = 0x0010,
79 PER_MASK = 0x00ff,
80};
81
Ralf Baechle34e856e2006-10-19 23:28:17 -070082#ifdef __KERNEL__
Linus Torvalds1da177e2005-04-16 15:20:36 -070083
84/*
85 * Description of an execution domain.
86 *
87 * The first two members are refernced from assembly source
88 * and should stay where they are unless explicitly needed.
89 */
90typedef void (*handler_t)(int, struct pt_regs *);
91
92struct exec_domain {
93 const char *name; /* name of the execdomain */
94 handler_t handler; /* handler for syscalls */
95 unsigned char pers_low; /* lowest personality */
96 unsigned char pers_high; /* highest personality */
97 unsigned long *signal_map; /* signal mapping */
98 unsigned long *signal_invmap; /* reverse signal mapping */
99 struct map_segment *err_map; /* error mapping */
100 struct map_segment *socktype_map; /* socket type mapping */
101 struct map_segment *sockopt_map; /* socket option mapping */
102 struct map_segment *af_map; /* address family mapping */
103 struct module *module; /* module context of the ed. */
104 struct exec_domain *next; /* linked list (internal) */
105};
106
107/*
108 * Return the base personality without flags.
109 */
110#define personality(pers) (pers & PER_MASK)
111
Linus Torvalds1da177e2005-04-16 15:20:36 -0700112
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 */