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 * Flags for bug emulation. 17 * 18 * These occupy the top three bytes. 19 */ 20 enum { 21 ADDR_NO_RANDOMIZE = 0x0040000, /* disable randomization of VA space */ 22 FDPIC_FUNCPTRS = 0x0080000, /* userspace function ptrs point to descriptors 23 * (signal handling) 24 */ 25 MMAP_PAGE_ZERO = 0x0100000, 26 ADDR_COMPAT_LAYOUT = 0x0200000, 27 READ_IMPLIES_EXEC = 0x0400000, 28 ADDR_LIMIT_32BIT = 0x0800000, 29 SHORT_INODE = 0x1000000, 30 WHOLE_SECONDS = 0x2000000, 31 STICKY_TIMEOUTS = 0x4000000, 32 ADDR_LIMIT_3GB = 0x8000000, 33 }; 34 35 /* 36 * Security-relevant compatibility flags that must be 37 * cleared upon setuid or setgid exec: 38 */ 39 #define PER_CLEAR_ON_SETID (READ_IMPLIES_EXEC|ADDR_NO_RANDOMIZE) 40 41 /* 42 * Personality types. 43 * 44 * These go in the low byte. Avoid using the top bit, it will 45 * conflict with error returns. 46 */ 47 enum { 48 PER_LINUX = 0x0000, 49 PER_LINUX_32BIT = 0x0000 | ADDR_LIMIT_32BIT, 50 PER_LINUX_FDPIC = 0x0000 | FDPIC_FUNCPTRS, 51 PER_SVR4 = 0x0001 | STICKY_TIMEOUTS | MMAP_PAGE_ZERO, 52 PER_SVR3 = 0x0002 | STICKY_TIMEOUTS | SHORT_INODE, 53 PER_SCOSVR3 = 0x0003 | STICKY_TIMEOUTS | 54 WHOLE_SECONDS | SHORT_INODE, 55 PER_OSR5 = 0x0003 | STICKY_TIMEOUTS | WHOLE_SECONDS, 56 PER_WYSEV386 = 0x0004 | STICKY_TIMEOUTS | SHORT_INODE, 57 PER_ISCR4 = 0x0005 | STICKY_TIMEOUTS, 58 PER_BSD = 0x0006, 59 PER_SUNOS = 0x0006 | STICKY_TIMEOUTS, 60 PER_XENIX = 0x0007 | STICKY_TIMEOUTS | SHORT_INODE, 61 PER_LINUX32 = 0x0008, 62 PER_LINUX32_3GB = 0x0008 | ADDR_LIMIT_3GB, 63 PER_IRIX32 = 0x0009 | STICKY_TIMEOUTS,/* IRIX5 32-bit */ 64 PER_IRIXN32 = 0x000a | STICKY_TIMEOUTS,/* IRIX6 new 32-bit */ 65 PER_IRIX64 = 0x000b | STICKY_TIMEOUTS,/* IRIX6 64-bit */ 66 PER_RISCOS = 0x000c, 67 PER_SOLARIS = 0x000d | STICKY_TIMEOUTS, 68 PER_UW7 = 0x000e | STICKY_TIMEOUTS | MMAP_PAGE_ZERO, 69 PER_OSF4 = 0x000f, /* OSF/1 v4 */ 70 PER_HPUX = 0x0010, 71 PER_MASK = 0x00ff, 72 }; 73 74 75 /* 76 * Description of an execution domain. 77 * 78 * The first two members are refernced from assembly source 79 * and should stay where they are unless explicitly needed. 80 */ 81 typedef void (*handler_t)(int, struct pt_regs *); 82 83 struct exec_domain { 84 const char *name; /* name of the execdomain */ 85 handler_t handler; /* handler for syscalls */ 86 unsigned char pers_low; /* lowest personality */ 87 unsigned char pers_high; /* highest personality */ 88 unsigned long *signal_map; /* signal mapping */ 89 unsigned long *signal_invmap; /* reverse signal mapping */ 90 struct map_segment *err_map; /* error mapping */ 91 struct map_segment *socktype_map; /* socket type mapping */ 92 struct map_segment *sockopt_map; /* socket option mapping */ 93 struct map_segment *af_map; /* address family mapping */ 94 struct module *module; /* module context of the ed. */ 95 struct exec_domain *next; /* linked list (internal) */ 96 }; 97 98 /* 99 * Return the base personality without flags. 100 */ 101 #define personality(pers) (pers & PER_MASK) 102 103 /* 104 * Personality of the currently running process. 105 */ 106 #define get_personality (current->personality) 107 108 /* 109 * Change personality of the currently running process. 110 */ 111 #define set_personality(pers) \ 112 ((current->personality == pers) ? 0 : __set_personality(pers)) 113 114 #endif /* _LINUX_PERSONALITY_H */ 115