Line data Source code
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 | \
44 : ADDR_NO_RANDOMIZE | \
45 : ADDR_COMPAT_LAYOUT | \
46 : MMAP_PAGE_ZERO)
47 :
48 : /*
49 : * Personality types.
50 : *
51 : * These go in the low byte. Avoid using the top bit, it will
52 : * conflict with error returns.
53 : */
54 : enum {
55 : PER_LINUX = 0x0000,
56 : PER_LINUX_32BIT = 0x0000 | ADDR_LIMIT_32BIT,
57 : PER_LINUX_FDPIC = 0x0000 | FDPIC_FUNCPTRS,
58 : PER_SVR4 = 0x0001 | STICKY_TIMEOUTS | MMAP_PAGE_ZERO,
59 : PER_SVR3 = 0x0002 | STICKY_TIMEOUTS | SHORT_INODE,
60 : PER_SCOSVR3 = 0x0003 | STICKY_TIMEOUTS |
61 : WHOLE_SECONDS | SHORT_INODE,
62 : PER_OSR5 = 0x0003 | STICKY_TIMEOUTS | WHOLE_SECONDS,
63 : PER_WYSEV386 = 0x0004 | STICKY_TIMEOUTS | SHORT_INODE,
64 : PER_ISCR4 = 0x0005 | STICKY_TIMEOUTS,
65 : PER_BSD = 0x0006,
66 : PER_SUNOS = 0x0006 | STICKY_TIMEOUTS,
67 : PER_XENIX = 0x0007 | STICKY_TIMEOUTS | SHORT_INODE,
68 : PER_LINUX32 = 0x0008,
69 : PER_LINUX32_3GB = 0x0008 | ADDR_LIMIT_3GB,
70 : PER_IRIX32 = 0x0009 | STICKY_TIMEOUTS,/* IRIX5 32-bit */
71 : PER_IRIXN32 = 0x000a | STICKY_TIMEOUTS,/* IRIX6 new 32-bit */
72 : PER_IRIX64 = 0x000b | STICKY_TIMEOUTS,/* IRIX6 64-bit */
73 : PER_RISCOS = 0x000c,
74 : PER_SOLARIS = 0x000d | STICKY_TIMEOUTS,
75 : PER_UW7 = 0x000e | STICKY_TIMEOUTS | MMAP_PAGE_ZERO,
76 : PER_OSF4 = 0x000f, /* OSF/1 v4 */
77 : PER_HPUX = 0x0010,
78 : PER_MASK = 0x00ff,
79 : };
80 :
81 : #ifdef __KERNEL__
82 :
83 : /*
84 : * Description of an execution domain.
85 : *
86 : * The first two members are refernced from assembly source
87 : * and should stay where they are unless explicitly needed.
88 : */
89 : typedef void (*handler_t)(int, struct pt_regs *);
90 2 :
91 : struct exec_domain {
92 : const char *name; /* name of the execdomain */
93 : handler_t handler; /* handler for syscalls */
94 : unsigned char pers_low; /* lowest personality */
95 : unsigned char pers_high; /* highest personality */
96 : unsigned long *signal_map; /* signal mapping */
97 : unsigned long *signal_invmap; /* reverse signal mapping */
98 : struct map_segment *err_map; /* error mapping */
99 : struct map_segment *socktype_map; /* socket type mapping */
100 : struct map_segment *sockopt_map; /* socket option mapping */
101 : struct map_segment *af_map; /* address family mapping */
102 : struct module *module; /* module context of the ed. */
103 : struct exec_domain *next; /* linked list (internal) */
104 : };
105 :
106 : /*
107 : * Return the base personality without flags.
108 : */
109 : #define personality(pers) (pers & PER_MASK)
110 :
111 :
112 : /*
113 : * Change personality of the currently running process.
114 : */
115 : #define set_personality(pers) \
116 : ((current->personality == (pers)) ? 0 : __set_personality(pers))
117 :
118 : #endif /* __KERNEL__ */
119 :
120 : #endif /* _LINUX_PERSONALITY_H */
|