Linux v2.6.15-rc6
[pohmelfs.git] / include / linux / personality.h
blob80d780e5a8f5ae501ee8e12b2d0977c257df385f
1 #ifndef _LINUX_PERSONALITY_H
2 #define _LINUX_PERSONALITY_H
4 /*
5 * Handling of different ABIs (personalities).
6 */
8 struct exec_domain;
9 struct pt_regs;
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);
16 * Flags for bug emulation.
18 * These occupy the top three bytes.
20 enum {
21 ADDR_NO_RANDOMIZE = 0x0040000, /* disable randomization of VA space */
22 FDPIC_FUNCPTRS = 0x0080000, /* userspace function ptrs point to descriptors
23 * (signal handling)
25 MMAP_PAGE_ZERO = 0x0100000,
26 ADDR_COMPAT_LAYOUT = 0x0200000,
27 READ_IMPLIES_EXEC = 0x0400000,
28 ADDR_LIMIT_32BIT = 0x0800000,
29 SHORT_INODE = 0x1000000,
30 WHOLE_SECONDS = 0x2000000,
31 STICKY_TIMEOUTS = 0x4000000,
32 ADDR_LIMIT_3GB = 0x8000000,
36 * Security-relevant compatibility flags that must be
37 * cleared upon setuid or setgid exec:
39 #define PER_CLEAR_ON_SETID (READ_IMPLIES_EXEC|ADDR_NO_RANDOMIZE)
42 * Personality types.
44 * These go in the low byte. Avoid using the top bit, it will
45 * conflict with error returns.
47 enum {
48 PER_LINUX = 0x0000,
49 PER_LINUX_32BIT = 0x0000 | ADDR_LIMIT_32BIT,
50 PER_LINUX_FDPIC = 0x0000 | FDPIC_FUNCPTRS,
51 PER_SVR4 = 0x0001 | STICKY_TIMEOUTS | MMAP_PAGE_ZERO,
52 PER_SVR3 = 0x0002 | STICKY_TIMEOUTS | SHORT_INODE,
53 PER_SCOSVR3 = 0x0003 | STICKY_TIMEOUTS |
54 WHOLE_SECONDS | SHORT_INODE,
55 PER_OSR5 = 0x0003 | STICKY_TIMEOUTS | WHOLE_SECONDS,
56 PER_WYSEV386 = 0x0004 | STICKY_TIMEOUTS | SHORT_INODE,
57 PER_ISCR4 = 0x0005 | STICKY_TIMEOUTS,
58 PER_BSD = 0x0006,
59 PER_SUNOS = 0x0006 | STICKY_TIMEOUTS,
60 PER_XENIX = 0x0007 | STICKY_TIMEOUTS | SHORT_INODE,
61 PER_LINUX32 = 0x0008,
62 PER_LINUX32_3GB = 0x0008 | ADDR_LIMIT_3GB,
63 PER_IRIX32 = 0x0009 | STICKY_TIMEOUTS,/* IRIX5 32-bit */
64 PER_IRIXN32 = 0x000a | STICKY_TIMEOUTS,/* IRIX6 new 32-bit */
65 PER_IRIX64 = 0x000b | STICKY_TIMEOUTS,/* IRIX6 64-bit */
66 PER_RISCOS = 0x000c,
67 PER_SOLARIS = 0x000d | STICKY_TIMEOUTS,
68 PER_UW7 = 0x000e | STICKY_TIMEOUTS | MMAP_PAGE_ZERO,
69 PER_OSF4 = 0x000f, /* OSF/1 v4 */
70 PER_HPUX = 0x0010,
71 PER_MASK = 0x00ff,
76 * Description of an execution domain.
78 * The first two members are refernced from assembly source
79 * and should stay where they are unless explicitly needed.
81 typedef void (*handler_t)(int, struct pt_regs *);
83 struct exec_domain {
84 const char *name; /* name of the execdomain */
85 handler_t handler; /* handler for syscalls */
86 unsigned char pers_low; /* lowest personality */
87 unsigned char pers_high; /* highest personality */
88 unsigned long *signal_map; /* signal mapping */
89 unsigned long *signal_invmap; /* reverse signal mapping */
90 struct map_segment *err_map; /* error mapping */
91 struct map_segment *socktype_map; /* socket type mapping */
92 struct map_segment *sockopt_map; /* socket option mapping */
93 struct map_segment *af_map; /* address family mapping */
94 struct module *module; /* module context of the ed. */
95 struct exec_domain *next; /* linked list (internal) */
99 * Return the base personality without flags.
101 #define personality(pers) (pers & PER_MASK)
104 * Personality of the currently running process.
106 #define get_personality (current->personality)
109 * Change personality of the currently running process.
111 #define set_personality(pers) \
112 ((current->personality == pers) ? 0 : __set_personality(pers))
114 #endif /* _LINUX_PERSONALITY_H */