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Viewing changes to include/linux/personality.h

  • Committer: Package Import Robot
  • Author(s): Alessio Igor Bogani
  • Date: 2011-10-26 11:13:05 UTC
  • Revision ID: package-import@ubuntu.com-20111026111305-tz023xykf0i6eosh
Tags: upstream-3.2.0
Import upstream version 3.2.0

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include/linux/personality.h
 
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#ifndef _LINUX_PERSONALITY_H
 
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#define _LINUX_PERSONALITY_H
 
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#ifdef __KERNEL__
 
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/*
 
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 * Handling of different ABIs (personalities).
 
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 */
 
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struct exec_domain;
 
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struct pt_regs;
 
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extern int              register_exec_domain(struct exec_domain *);
 
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extern int              unregister_exec_domain(struct exec_domain *);
 
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extern int              __set_personality(unsigned int);
 
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#endif /* __KERNEL__ */
 
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/*
 
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 * Flags for bug emulation.
 
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 *
 
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 * These occupy the top three bytes.
 
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 */
 
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enum {
 
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        UNAME26 =               0x0020000,
 
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        ADDR_NO_RANDOMIZE =     0x0040000,      /* disable randomization of VA space */
 
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        FDPIC_FUNCPTRS =        0x0080000,      /* userspace function ptrs point to descriptors
 
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                                                 * (signal handling)
 
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                                                 */
 
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        MMAP_PAGE_ZERO =        0x0100000,
 
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        ADDR_COMPAT_LAYOUT =    0x0200000,
 
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        READ_IMPLIES_EXEC =     0x0400000,
 
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        ADDR_LIMIT_32BIT =      0x0800000,
 
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        SHORT_INODE =           0x1000000,
 
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        WHOLE_SECONDS =         0x2000000,
 
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        STICKY_TIMEOUTS =       0x4000000,
 
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        ADDR_LIMIT_3GB =        0x8000000,
 
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};
 
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/*
 
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 * Security-relevant compatibility flags that must be
 
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 * cleared upon setuid or setgid exec:
 
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 */
 
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#define PER_CLEAR_ON_SETID (READ_IMPLIES_EXEC  | \
 
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                            ADDR_NO_RANDOMIZE  | \
 
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                            ADDR_COMPAT_LAYOUT | \
 
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                            MMAP_PAGE_ZERO)
 
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/*
 
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 * Personality types.
 
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 *
 
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 * These go in the low byte.  Avoid using the top bit, it will
 
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 * conflict with error returns.
 
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 */
 
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enum {
 
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        PER_LINUX =             0x0000,
 
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        PER_LINUX_32BIT =       0x0000 | ADDR_LIMIT_32BIT,
 
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        PER_LINUX_FDPIC =       0x0000 | FDPIC_FUNCPTRS,
 
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        PER_SVR4 =              0x0001 | STICKY_TIMEOUTS | MMAP_PAGE_ZERO,
 
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        PER_SVR3 =              0x0002 | STICKY_TIMEOUTS | SHORT_INODE,
 
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        PER_SCOSVR3 =           0x0003 | STICKY_TIMEOUTS |
 
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                                         WHOLE_SECONDS | SHORT_INODE,
 
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        PER_OSR5 =              0x0003 | STICKY_TIMEOUTS | WHOLE_SECONDS,
 
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        PER_WYSEV386 =          0x0004 | STICKY_TIMEOUTS | SHORT_INODE,
 
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        PER_ISCR4 =             0x0005 | STICKY_TIMEOUTS,
 
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        PER_BSD =               0x0006,
 
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        PER_SUNOS =             0x0006 | STICKY_TIMEOUTS,
 
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        PER_XENIX =             0x0007 | STICKY_TIMEOUTS | SHORT_INODE,
 
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        PER_LINUX32 =           0x0008,
 
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        PER_LINUX32_3GB =       0x0008 | ADDR_LIMIT_3GB,
 
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        PER_IRIX32 =            0x0009 | STICKY_TIMEOUTS,/* IRIX5 32-bit */
 
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        PER_IRIXN32 =           0x000a | STICKY_TIMEOUTS,/* IRIX6 new 32-bit */
 
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        PER_IRIX64 =            0x000b | STICKY_TIMEOUTS,/* IRIX6 64-bit */
 
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        PER_RISCOS =            0x000c,
 
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        PER_SOLARIS =           0x000d | STICKY_TIMEOUTS,
 
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        PER_UW7 =               0x000e | STICKY_TIMEOUTS | MMAP_PAGE_ZERO,
 
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        PER_OSF4 =              0x000f,                  /* OSF/1 v4 */
 
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        PER_HPUX =              0x0010,
 
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        PER_MASK =              0x00ff,
 
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};
 
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#ifdef __KERNEL__
 
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/*
 
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 * Description of an execution domain.
 
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 * 
 
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 * The first two members are refernced from assembly source
 
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 * and should stay where they are unless explicitly needed.
 
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 */
 
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typedef void (*handler_t)(int, struct pt_regs *);
 
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struct exec_domain {
 
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        const char              *name;          /* name of the execdomain */
 
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        handler_t               handler;        /* handler for syscalls */
 
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        unsigned char           pers_low;       /* lowest personality */
 
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        unsigned char           pers_high;      /* highest personality */
 
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        unsigned long           *signal_map;    /* signal mapping */
 
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        unsigned long           *signal_invmap; /* reverse signal mapping */
 
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        struct map_segment      *err_map;       /* error mapping */
 
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        struct map_segment      *socktype_map;  /* socket type mapping */
 
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        struct map_segment      *sockopt_map;   /* socket option mapping */
 
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        struct map_segment      *af_map;        /* address family mapping */
 
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        struct module           *module;        /* module context of the ed. */
 
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        struct exec_domain      *next;          /* linked list (internal) */
 
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};
 
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/*
 
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 * Return the base personality without flags.
 
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 */
 
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#define personality(pers)       (pers & PER_MASK)
 
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/*
 
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 * Change personality of the currently running process.
 
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 */
 
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#define set_personality(pers) \
 
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        ((current->personality == (pers)) ? 0 : __set_personality(pers))
 
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#endif /* __KERNEL__ */
 
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#endif /* _LINUX_PERSONALITY_H */