| Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame^] | 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 */ |