LXR linux-old/include/linux/personality.h

   1#ifndef _LINUX_PERSONALITY_H
   2#define _LINUX_PERSONALITY_H
   3
   4/*
   5 * Handling of different ABIs (personalities).
   6 */
   7
   8struct exec_domain;
   9struct pt_regs;
  10
  11extern int              register_exec_domain(struct exec_domain *);
  12extern int              unregister_exec_domain(struct exec_domain *);
  13extern int              __set_personality(unsigned long);
  14
  15
  16/*
  17 * Sysctl variables related to binary emulation.
  18 */
  19extern unsigned long abi_defhandler_coff;
  20extern unsigned long abi_defhandler_elf;
  21extern unsigned long abi_defhandler_lcall7;
  22extern unsigned long abi_defhandler_libcso;
  23extern int abi_fake_utsname;
  24
  25
  26/*
  27 * Flags for bug emulation.
  28 *
  29 * These occupy the top three bytes.
  30 */
  31enum {
  32        MMAP_PAGE_ZERO =        0x0100000,
  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 * Personality types.
  42 *
  43 * These go in the low byte.  Avoid using the top bit, it will
  44 * conflict with error returns.
  45 */
  46enum {
  47        PER_LINUX =             0x0000,
  48        PER_LINUX_32BIT =       0x0000 | ADDR_LIMIT_32BIT,
  49        PER_SVR4 =              0x0001 | STICKY_TIMEOUTS | MMAP_PAGE_ZERO,
  50        PER_SVR3 =              0x0002 | STICKY_TIMEOUTS | SHORT_INODE,
  51        PER_SCOSVR3 =           0x0003 | STICKY_TIMEOUTS |
  52                                         WHOLE_SECONDS | SHORT_INODE,
  53        PER_OSR5 =              0x0003 | STICKY_TIMEOUTS | WHOLE_SECONDS,
  54        PER_WYSEV386 =          0x0004 | STICKY_TIMEOUTS | SHORT_INODE,
  55        PER_ISCR4 =             0x0005 | STICKY_TIMEOUTS,
  56        PER_BSD =               0x0006,
  57        PER_SUNOS =             0x0006 | STICKY_TIMEOUTS,
  58        PER_XENIX =             0x0007 | STICKY_TIMEOUTS | SHORT_INODE,
  59        PER_LINUX32 =           0x0008,
  60        PER_LINUX32_3GB =       0x0008 | ADDR_LIMIT_3GB,
  61        PER_IRIX32 =            0x0009 | STICKY_TIMEOUTS,/* IRIX5 32-bit */
  62        PER_IRIXN32 =           0x000a | STICKY_TIMEOUTS,/* IRIX6 new 32-bit */
  63        PER_IRIX64 =            0x000b | STICKY_TIMEOUTS,/* IRIX6 64-bit */
  64        PER_RISCOS =            0x000c,
  65        PER_SOLARIS =           0x000d | STICKY_TIMEOUTS,
  66        PER_UW7 =               0x000e | STICKY_TIMEOUTS | MMAP_PAGE_ZERO,
  67        PER_HPUX =              0x000f,
  68        PER_OSF4 =              0x0010,                  /* OSF/1 v4 */
  69        PER_MASK =              0x00ff,
  70};
  71
  72
  73/*
  74 * Description of an execution domain.
  75 * 
  76 * The first two members are refernced from assembly source
  77 * and should stay where they are unless explicitly needed.
  78 */
  79typedef void (*handler_t)(int, struct pt_regs *);
  80
  81struct exec_domain {
  82        const char              *name;          /* name of the execdomain */
  83        handler_t               handler;        /* handler for syscalls */
  84        unsigned char           pers_low;       /* lowest personality */
  85        unsigned char           pers_high;      /* highest personality */
  86        unsigned long           *signal_map;    /* signal mapping */
  87        unsigned long           *signal_invmap; /* reverse signal mapping */
  88        struct map_segment      *err_map;       /* error mapping */
  89        struct map_segment      *socktype_map;  /* socket type mapping */
  90        struct map_segment      *sockopt_map;   /* socket option mapping */
  91        struct map_segment      *af_map;        /* address family mapping */
  92        struct module           *module;        /* module context of the ed. */
  93        struct exec_domain      *next;          /* linked list (internal) */
  94};
  95
  96/*
  97 * Return the base personality without flags.
  98 */
  99#define personality(pers)       (pers & PER_MASK)
 100
 101/*
 102 * Personality of the currently running process.
 103 */
 104#define get_personality         (current->personality)
 105
 106/*
 107 * Change personality of the currently running process.
 108 */
 109#define set_personality(pers) \
 110        ((current->personality == pers) ? 0 : __set_personality(pers))
 111
 112/*
 113 * Load an execution domain.
 114 */
 115#define get_exec_domain(ep)                             \
 116do {                                                    \
 117        if (ep != NULL && ep->module != NULL)           \
 118                __MOD_INC_USE_COUNT(ep->module);        \
 119} while (0)
 120
 121/*
 122 * Unload an execution domain.
 123 */
 124#define put_exec_domain(ep)                             \
 125do {                                                    \
 126        if (ep != NULL && ep->module != NULL)           \
 127                __MOD_DEC_USE_COUNT(ep->module);        \
 128} while (0)
 129
 130#endif /* _LINUX_PERSONALITY_H */
 131