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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 int); |
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 | |
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 */ |
121 |
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