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_COMPAT_LAYOUT =    0x0200000,
  34         READ_IMPLIES_EXEC =     0x0400000,
  35         ADDR_LIMIT_32BIT =      0x0800000,
  36         SHORT_INODE =           0x1000000,
  37         WHOLE_SECONDS =         0x2000000,
  38         STICKY_TIMEOUTS =       0x4000000,
  39         ADDR_LIMIT_3GB =        0x8000000,
  40 };
  41
  42 /*
  43  * Security-relevant compatibility flags that must be
  44  * cleared upon setuid or setgid exec:
  45  */
  46 #define PER_CLEAR_ON_SETID (READ_IMPLIES_EXEC)
  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  */
  54 enum {
  55         PER_LINUX =             0x0000,
  56         PER_LINUX_32BIT =       0x0000 | ADDR_LIMIT_32BIT,
  57         PER_SVR4 =              0x0001 | STICKY_TIMEOUTS | MMAP_PAGE_ZERO,
  58         PER_SVR3 =              0x0002 | STICKY_TIMEOUTS | SHORT_INODE,
  59         PER_SCOSVR3 =           0x0003 | STICKY_TIMEOUTS |
  60                                          WHOLE_SECONDS | SHORT_INODE,
  61         PER_OSR5 =              0x0003 | STICKY_TIMEOUTS | WHOLE_SECONDS,
  62         PER_WYSEV386 =          0x0004 | STICKY_TIMEOUTS | SHORT_INODE,
  63         PER_ISCR4 =             0x0005 | STICKY_TIMEOUTS,
  64         PER_BSD =               0x0006,
  65         PER_SUNOS =             0x0006 | STICKY_TIMEOUTS,
  66         PER_XENIX =             0x0007 | STICKY_TIMEOUTS | SHORT_INODE,
  67         PER_LINUX32 =           0x0008,
  68         PER_LINUX32_3GB =       0x0008 | ADDR_LIMIT_3GB,
  69         PER_IRIX32 =            0x0009 | STICKY_TIMEOUTS,/* IRIX5 32-bit */
  70         PER_IRIXN32 =           0x000a | STICKY_TIMEOUTS,/* IRIX6 new 32-bit */
  71         PER_IRIX64 =            0x000b | STICKY_TIMEOUTS,/* IRIX6 64-bit */
  72         PER_RISCOS =            0x000c,
  73         PER_SOLARIS =           0x000d | STICKY_TIMEOUTS,
  74         PER_UW7 =               0x000e | STICKY_TIMEOUTS | MMAP_PAGE_ZERO,
  75         PER_OSF4 =              0x000f,                  /* OSF/1 v4 */
  76         PER_HPUX =              0x0010,
  77         PER_MASK =              0x00ff,
  78 };
  79
  80
  81 /*
  82  * Description of an execution domain.
  83  *
  84  * The first two members are refernced from assembly source
  85  * and should stay where they are unless explicitly needed.
  86  */
  87 typedef void (*handler_t)(int, struct pt_regs *);
  88
  89 struct exec_domain {
  90         const char              *name;          /* name of the execdomain */
  91         handler_t               handler;        /* handler for syscalls */
  92         unsigned char           pers_low;       /* lowest personality */
  93         unsigned char           pers_high;      /* highest personality */
  94         unsigned long           *signal_map;    /* signal mapping */
  95         unsigned long           *signal_invmap; /* reverse signal mapping */
  96         struct map_segment      *err_map;       /* error mapping */
  97         struct map_segment      *socktype_map;  /* socket type mapping */
  98         struct map_segment      *sockopt_map;   /* socket option mapping */
  99         struct map_segment      *af_map;        /* address family mapping */
 100         struct module           *module;        /* module context of the ed. */
 101         struct exec_domain      *next;          /* linked list (internal) */
 102 };
 103
 104 /*
 105  * Return the base personality without flags.
 106  */
 107 #define personality(pers)       (pers & PER_MASK)
 108
 109 /*
 110  * Personality of the currently running process.
 111  */
 112 #define get_personality         (current->personality)
 113
 114 /*
 115  * Change personality of the currently running process.
 116  */
 117 #define set_personality(pers) \
 118         ((current->personality == pers) ? 0 : __set_personality(pers))
 119
 120 #endif /* _LINUX_PERSONALITY_H */