Merge branch 'x86-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git...
[linux-2.6.git] / include / linux / personality.h
1 #ifndef _LINUX_PERSONALITY_H
2 #define _LINUX_PERSONALITY_H
3
4 #ifdef __KERNEL__
5
6 /*
7  * Handling of different ABIs (personalities).
8  */
9
10 struct exec_domain;
11 struct pt_regs;
12
13 extern int              register_exec_domain(struct exec_domain *);
14 extern int              unregister_exec_domain(struct exec_domain *);
15 extern int              __set_personality(unsigned long);
16
17 #endif /* __KERNEL__ */
18
19 /*
20  * Flags for bug emulation.
21  *
22  * These occupy the top three bytes.
23  */
24 enum {
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  */
51 enum {
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
78 #ifdef __KERNEL__
79
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  */
86 typedef void (*handler_t)(int, struct pt_regs *);
87
88 struct 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 /*
110  * Change personality of the currently running process.
111  */
112 #define set_personality(pers) \
113         ((current->personality == (pers)) ? 0 : __set_personality(pers))
114
115 #endif /* __KERNEL__ */
116
117 #endif /* _LINUX_PERSONALITY_H */