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 UNAME26 = 0x0020000, 26 ADDR_NO_RANDOMIZE = 0x0040000, /* disable randomization of VA space */ 27 FDPIC_FUNCPTRS = 0x0080000, /* userspace function ptrs point to descriptors 28 * (signal handling) 29 */ 30 MMAP_PAGE_ZERO = 0x0100000, 31 ADDR_COMPAT_LAYOUT = 0x0200000, 32 READ_IMPLIES_EXEC = 0x0400000, 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 * Security-relevant compatibility flags that must be 42 * cleared upon setuid or setgid exec: 43 */ 44 #define PER_CLEAR_ON_SETID (READ_IMPLIES_EXEC | \ 45 ADDR_NO_RANDOMIZE | \ 46 ADDR_COMPAT_LAYOUT | \ 47 MMAP_PAGE_ZERO) 48 49 /* 50 * Personality types. 51 * 52 * These go in the low byte. Avoid using the top bit, it will 53 * conflict with error returns. 54 */ 55 enum { 56 PER_LINUX = 0x0000, 57 PER_LINUX_32BIT = 0x0000 | ADDR_LIMIT_32BIT, 58 PER_LINUX_FDPIC = 0x0000 | FDPIC_FUNCPTRS, 59 PER_SVR4 = 0x0001 | STICKY_TIMEOUTS | MMAP_PAGE_ZERO, 60 PER_SVR3 = 0x0002 | STICKY_TIMEOUTS | SHORT_INODE, 61 PER_SCOSVR3 = 0x0003 | STICKY_TIMEOUTS | 62 WHOLE_SECONDS | SHORT_INODE, 63 PER_OSR5 = 0x0003 | STICKY_TIMEOUTS | WHOLE_SECONDS, 64 PER_WYSEV386 = 0x0004 | STICKY_TIMEOUTS | SHORT_INODE, 65 PER_ISCR4 = 0x0005 | STICKY_TIMEOUTS, 66 PER_BSD = 0x0006, 67 PER_SUNOS = 0x0006 | STICKY_TIMEOUTS, 68 PER_XENIX = 0x0007 | STICKY_TIMEOUTS | SHORT_INODE, 69 PER_LINUX32 = 0x0008, 70 PER_LINUX32_3GB = 0x0008 | ADDR_LIMIT_3GB, 71 PER_IRIX32 = 0x0009 | STICKY_TIMEOUTS,/* IRIX5 32-bit */ 72 PER_IRIXN32 = 0x000a | STICKY_TIMEOUTS,/* IRIX6 new 32-bit */ 73 PER_IRIX64 = 0x000b | STICKY_TIMEOUTS,/* IRIX6 64-bit */ 74 PER_RISCOS = 0x000c, 75 PER_SOLARIS = 0x000d | STICKY_TIMEOUTS, 76 PER_UW7 = 0x000e | STICKY_TIMEOUTS | MMAP_PAGE_ZERO, 77 PER_OSF4 = 0x000f, /* OSF/1 v4 */ 78 PER_HPUX = 0x0010, 79 PER_MASK = 0x00ff, 80 }; 81 82 #ifdef __KERNEL__ 83 84 /* 85 * Description of an execution domain. 86 * 87 * The first two members are refernced from assembly source 88 * and should stay where they are unless explicitly needed. 89 */ 90 typedef void (*handler_t)(int, struct pt_regs *); 91 92 struct exec_domain { 93 const char *name; /* name of the execdomain */ 94 handler_t handler; /* handler for syscalls */ 95 unsigned char pers_low; /* lowest personality */ 96 unsigned char pers_high; /* highest personality */ 97 unsigned long *signal_map; /* signal mapping */ 98 unsigned long *signal_invmap; /* reverse signal mapping */ 99 struct map_segment *err_map; /* error mapping */ 100 struct map_segment *socktype_map; /* socket type mapping */ 101 struct map_segment *sockopt_map; /* socket option mapping */ 102 struct map_segment *af_map; /* address family mapping */ 103 struct module *module; /* module context of the ed. */ 104 struct exec_domain *next; /* linked list (internal) */ 105 }; 106 107 /* 108 * Return the base personality without flags. 109 */ 110 #define personality(pers) (pers & PER_MASK) 111 112 113 /* 114 * Change personality of the currently running process. 115 */ 116 #define set_personality(pers) \ 117 ((current->personality == (pers)) ? 0 : __set_personality(pers)) 118 119 #endif /* __KERNEL__ */ 120 121 #endif /* _LINUX_PERSONALITY_H */ 122