1#ifndef _LINUX_PERSONALITY_H 2#define _LINUX_PERSONALITY_H 3 4#ifdef __KERNEL__ 5 6/* 7 * Handling of different ABIs (personalities). 8 */ 9 10struct exec_domain; 11struct pt_regs; 12 13extern int register_exec_domain(struct exec_domain *); 14extern int unregister_exec_domain(struct exec_domain *); 15extern 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 */ 24enum { 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 */ 54enum { 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 */ 89typedef void (*handler_t)(int, struct pt_regs *); 90 91struct 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