include/linux/personality.h

   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 /*
  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 };
  38
  39 /*
  40  * Personality types.
  41  *
  42  * These go in the low byte.  Avoid using the top bit, it will
  43  * conflict with error returns.
  44  */
  45 enum {
  46         PER_LINUX =             0x0000,
  47         PER_LINUX_32BIT =       0x0000 | ADDR_LIMIT_32BIT,
  48         PER_SVR4 =              0x0001 | STICKY_TIMEOUTS | MMAP_PAGE_ZERO,
  49         PER_SVR3 =              0x0002 | STICKY_TIMEOUTS | SHORT_INODE,
  50         PER_SCOSVR3 =           0x0003 | STICKY_TIMEOUTS |
  51                                          WHOLE_SECONDS | SHORT_INODE,
  52         PER_OSR5 =              0x0003 | STICKY_TIMEOUTS | WHOLE_SECONDS,
  53         PER_WYSEV386 =          0x0004 | STICKY_TIMEOUTS | SHORT_INODE,
  54         PER_ISCR4 =             0x0005 | STICKY_TIMEOUTS,
  55         PER_BSD =               0x0006,
  56         PER_SUNOS =             0x0006 | STICKY_TIMEOUTS,
  57         PER_XENIX =             0x0007 | STICKY_TIMEOUTS | SHORT_INODE,
  58         PER_LINUX32 =           0x0008,
  59         PER_IRIX32 =            0x0009 | STICKY_TIMEOUTS,/* IRIX5 32-bit */
  60         PER_IRIXN32 =           0x000a | STICKY_TIMEOUTS,/* IRIX6 new 32-bit */
  61         PER_IRIX64 =            0x000b | STICKY_TIMEOUTS,/* IRIX6 64-bit */
  62         PER_RISCOS =            0x000c,
  63         PER_SOLARIS =           0x000d | STICKY_TIMEOUTS,
  64         PER_UW7 =               0x000e | STICKY_TIMEOUTS | MMAP_PAGE_ZERO,
  65         PER_HPUX =              0x000f,
  66         PER_OSF4 =              0x0010,                  /* OSF/1 v4 */
  67         PER_MASK =              0x00ff,
  68 };
  69
  70
  71 /*
  72  * Description of an execution domain.
  73  *
  74  * The first two members are refernced from assembly source
  75  * and should stay where they are unless explicitly needed.
  76  */
  77 typedef void (*handler_t)(int, struct pt_regs *);
  78
  79 struct exec_domain {
  80         const char              *name;          /* name of the execdomain */
  81         handler_t               handler;        /* handler for syscalls */
  82         unsigned char           pers_low;       /* lowest personality */
  83         unsigned char           pers_high;      /* highest personality */
  84         unsigned long           *signal_map;    /* signal mapping */
  85         unsigned long           *signal_invmap; /* reverse signal mapping */
  86         struct map_segment      *err_map;       /* error mapping */
  87         struct map_segment      *socktype_map;  /* socket type mapping */
  88         struct map_segment      *sockopt_map;   /* socket option mapping */
  89         struct map_segment      *af_map;        /* address family mapping */
  90         struct module           *module;        /* module context of the ed. */
  91         struct exec_domain      *next;          /* linked list (internal) */
  92 };
  93
  94 /*
  95  * Return the base personality without flags.
  96  */
  97 #define personality(pers)       (pers & PER_MASK)
  98
  99 /*
 100  * Personality of the currently running process.
 101  */
 102 #define get_personality         (current->personality)
 103
 104 /*
 105  * Change personality of the currently running process.
 106  */
 107 #define set_personality(pers) \
 108         ((current->personality == pers) ? 0 : __set_personality(pers))
 109
 110 /*
 111  * Load an execution domain.
 112  */
 113 #define get_exec_domain(ep)                             \
 114 do {                                                    \
 115         if (ep != NULL && ep->module != NULL)           \
 116                 __MOD_INC_USE_COUNT(ep->module);        \
 117 } while (0)
 118
 119 /*
 120  * Unload an execution domain.
 121  */
 122 #define put_exec_domain(ep)                             \
 123 do {                                                    \
 124         if (ep != NULL && ep->module != NULL)           \
 125                 __MOD_DEC_USE_COUNT(ep->module);        \
 126 } while (0)
 127
 128 #endif /* _LINUX_PERSONALITY_H */