1 /* SPDX-License-Identifier: GPL-2.0 */ <<
2 #ifndef _LINUX_PERSONALITY_H 1 #ifndef _LINUX_PERSONALITY_H
3 #define _LINUX_PERSONALITY_H 2 #define _LINUX_PERSONALITY_H
4 3
5 #include <uapi/linux/personality.h> !! 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_OSF4 = 0x000f, /* OSF/1 v4 */
>> 68 PER_HPUX = 0x0010,
>> 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 };
6 95
7 /* 96 /*
8 * Return the base personality without flags. 97 * Return the base personality without flags.
9 */ 98 */
10 #define personality(pers) (pers & PER_MA 99 #define personality(pers) (pers & PER_MASK)
11 100
12 /* 101 /*
>> 102 * Personality of the currently running process.
>> 103 */
>> 104 #define get_personality (current->personality)
>> 105
>> 106 /*
13 * Change personality of the currently running 107 * Change personality of the currently running process.
14 */ 108 */
15 #define set_personality(pers) (current->pers !! 109 #define set_personality(pers) \
>> 110 ((current->personality == pers) ? 0 : __set_personality(pers))
16 111
17 #endif /* _LINUX_PERSONALITY_H */ 112 #endif /* _LINUX_PERSONALITY_H */
18 113
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