1 #ifndef _LINUX_PERSONALITY_H
2 #define _LINUX_PERSONALITY_H
3 
4 /*
5  * Handling of different ABIs (personalities).
6  */
7 
8 struct exec_domain;
9 struct pt_regs;
10 
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);
14 
15 
16 /*
17  * Sysctl variables related to binary emulation.
18  */
19 extern unsigned long abi_defhandler_coff;
20 extern unsigned long abi_defhandler_elf;
21 extern unsigned long abi_defhandler_lcall7;
22 extern unsigned long abi_defhandler_libcso;
23 extern int abi_fake_utsname;
24 
25 
26 /*
27  * Flags for bug emulation.
28  *
29  * These occupy the top three bytes.
30  */
31 enum {
32 	MMAP_PAGE_ZERO =	0x0100000,
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  * Personality types.
42  *
43  * These go in the low byte.  Avoid using the top bit, it will
44  * conflict with error returns.
45  */
46 enum {
47 	PER_LINUX =		0x0000,
48 	PER_LINUX_32BIT =	0x0000 | ADDR_LIMIT_32BIT,
49 	PER_SVR4 =		0x0001 | STICKY_TIMEOUTS | MMAP_PAGE_ZERO,
50 	PER_SVR3 =		0x0002 | STICKY_TIMEOUTS | SHORT_INODE,
51 	PER_SCOSVR3 =		0x0003 | STICKY_TIMEOUTS |
52 					 WHOLE_SECONDS | SHORT_INODE,
53 	PER_OSR5 =		0x0003 | STICKY_TIMEOUTS | WHOLE_SECONDS,
54 	PER_WYSEV386 =		0x0004 | STICKY_TIMEOUTS | SHORT_INODE,
55 	PER_ISCR4 =		0x0005 | STICKY_TIMEOUTS,
56 	PER_BSD =		0x0006,
57 	PER_SUNOS =		0x0006 | STICKY_TIMEOUTS,
58 	PER_XENIX =		0x0007 | STICKY_TIMEOUTS | SHORT_INODE,
59 	PER_LINUX32 =		0x0008,
60 	PER_LINUX32_3GB =	0x0008 | ADDR_LIMIT_3GB,
61 	PER_IRIX32 =		0x0009 | STICKY_TIMEOUTS,/* IRIX5 32-bit */
62 	PER_IRIXN32 =		0x000a | STICKY_TIMEOUTS,/* IRIX6 new 32-bit */
63 	PER_IRIX64 =		0x000b | STICKY_TIMEOUTS,/* IRIX6 64-bit */
64 	PER_RISCOS =		0x000c,
65 	PER_SOLARIS =		0x000d | STICKY_TIMEOUTS,
66 	PER_UW7 =		0x000e | STICKY_TIMEOUTS | MMAP_PAGE_ZERO,
67 	PER_HPUX =		0x000f,
68 	PER_OSF4 =		0x0010,			 /* OSF/1 v4 */
69 	PER_MASK =		0x00ff,
70 };
71 
72 
73 /*
74  * Description of an execution domain.
75  *
76  * The first two members are refernced from assembly source
77  * and should stay where they are unless explicitly needed.
78  */
79 typedef void (*handler_t)(int, struct pt_regs *);
80 
81 struct exec_domain {
82 	const char		*name;		/* name of the execdomain */
83 	handler_t		handler;	/* handler for syscalls */
84 	unsigned char		pers_low;	/* lowest personality */
85 	unsigned char		pers_high;	/* highest personality */
86 	unsigned long		*signal_map;	/* signal mapping */
87 	unsigned long		*signal_invmap;	/* reverse signal mapping */
88 	struct map_segment	*err_map;	/* error mapping */
89 	struct map_segment	*socktype_map;	/* socket type mapping */
90 	struct map_segment	*sockopt_map;	/* socket option mapping */
91 	struct map_segment	*af_map;	/* address family mapping */
92 	struct module		*module;	/* module context of the ed. */
93 	struct exec_domain	*next;		/* linked list (internal) */
94 };
95 
96 /*
97  * Return the base personality without flags.
98  */
99 #define personality(pers)	(pers & PER_MASK)
100 
101 /*
102  * Personality of the currently running process.
103  */
104 #define get_personality		(current->personality)
105 
106 /*
107  * Change personality of the currently running process.
108  */
109 #define set_personality(pers) \
110 	((current->personality == pers) ? 0 : __set_personality(pers))
111 
112 /*
113  * Load an execution domain.
114  */
115 #define get_exec_domain(ep)				\
116 do {							\
117 	if (ep != NULL && ep->module != NULL)		\
118 		__MOD_INC_USE_COUNT(ep->module);	\
119 } while (0)
120 
121 /*
122  * Unload an execution domain.
123  */
124 #define put_exec_domain(ep)				\
125 do {							\
126 	if (ep != NULL && ep->module != NULL)		\
127 		__MOD_DEC_USE_COUNT(ep->module);	\
128 } while (0)
129 
130 #endif /* _LINUX_PERSONALITY_H */
131