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author | Linus Torvalds <torvalds@ppc970.osdl.org> | 2005-04-16 15:20:36 -0700 |
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committer | Linus Torvalds <torvalds@ppc970.osdl.org> | 2005-04-16 15:20:36 -0700 |
commit | 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 (patch) | |
tree | 0bba044c4ce775e45a88a51686b5d9f90697ea9d /include/linux/personality.h | |
download | linux-stable-1da177e4c3f41524e886b7f1b8a0c1fc7321cac2.tar.gz linux-stable-1da177e4c3f41524e886b7f1b8a0c1fc7321cac2.tar.bz2 linux-stable-1da177e4c3f41524e886b7f1b8a0c1fc7321cac2.zip |
Linux-2.6.12-rc2v2.6.12-rc2
Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.
Let it rip!
Diffstat (limited to 'include/linux/personality.h')
-rw-r--r-- | include/linux/personality.h | 114 |
1 files changed, 114 insertions, 0 deletions
diff --git a/include/linux/personality.h b/include/linux/personality.h new file mode 100644 index 000000000000..80d780e5a8f5 --- /dev/null +++ b/include/linux/personality.h @@ -0,0 +1,114 @@ +#ifndef _LINUX_PERSONALITY_H +#define _LINUX_PERSONALITY_H + +/* + * Handling of different ABIs (personalities). + */ + +struct exec_domain; +struct pt_regs; + +extern int register_exec_domain(struct exec_domain *); +extern int unregister_exec_domain(struct exec_domain *); +extern int __set_personality(unsigned long); + +/* + * Flags for bug emulation. + * + * These occupy the top three bytes. + */ +enum { + ADDR_NO_RANDOMIZE = 0x0040000, /* disable randomization of VA space */ + FDPIC_FUNCPTRS = 0x0080000, /* userspace function ptrs point to descriptors + * (signal handling) + */ + MMAP_PAGE_ZERO = 0x0100000, + ADDR_COMPAT_LAYOUT = 0x0200000, + READ_IMPLIES_EXEC = 0x0400000, + ADDR_LIMIT_32BIT = 0x0800000, + SHORT_INODE = 0x1000000, + WHOLE_SECONDS = 0x2000000, + STICKY_TIMEOUTS = 0x4000000, + ADDR_LIMIT_3GB = 0x8000000, +}; + +/* + * Security-relevant compatibility flags that must be + * cleared upon setuid or setgid exec: + */ +#define PER_CLEAR_ON_SETID (READ_IMPLIES_EXEC|ADDR_NO_RANDOMIZE) + +/* + * Personality types. + * + * These go in the low byte. Avoid using the top bit, it will + * conflict with error returns. + */ +enum { + PER_LINUX = 0x0000, + PER_LINUX_32BIT = 0x0000 | ADDR_LIMIT_32BIT, + PER_LINUX_FDPIC = 0x0000 | FDPIC_FUNCPTRS, + PER_SVR4 = 0x0001 | STICKY_TIMEOUTS | MMAP_PAGE_ZERO, + PER_SVR3 = 0x0002 | STICKY_TIMEOUTS | SHORT_INODE, + PER_SCOSVR3 = 0x0003 | STICKY_TIMEOUTS | + WHOLE_SECONDS | SHORT_INODE, + PER_OSR5 = 0x0003 | STICKY_TIMEOUTS | WHOLE_SECONDS, + PER_WYSEV386 = 0x0004 | STICKY_TIMEOUTS | SHORT_INODE, + PER_ISCR4 = 0x0005 | STICKY_TIMEOUTS, + PER_BSD = 0x0006, + PER_SUNOS = 0x0006 | STICKY_TIMEOUTS, + PER_XENIX = 0x0007 | STICKY_TIMEOUTS | SHORT_INODE, + PER_LINUX32 = 0x0008, + PER_LINUX32_3GB = 0x0008 | ADDR_LIMIT_3GB, + PER_IRIX32 = 0x0009 | STICKY_TIMEOUTS,/* IRIX5 32-bit */ + PER_IRIXN32 = 0x000a | STICKY_TIMEOUTS,/* IRIX6 new 32-bit */ + PER_IRIX64 = 0x000b | STICKY_TIMEOUTS,/* IRIX6 64-bit */ + PER_RISCOS = 0x000c, + PER_SOLARIS = 0x000d | STICKY_TIMEOUTS, + PER_UW7 = 0x000e | STICKY_TIMEOUTS | MMAP_PAGE_ZERO, + PER_OSF4 = 0x000f, /* OSF/1 v4 */ + PER_HPUX = 0x0010, + PER_MASK = 0x00ff, +}; + + +/* + * Description of an execution domain. + * + * The first two members are refernced from assembly source + * and should stay where they are unless explicitly needed. + */ +typedef void (*handler_t)(int, struct pt_regs *); + +struct exec_domain { + const char *name; /* name of the execdomain */ + handler_t handler; /* handler for syscalls */ + unsigned char pers_low; /* lowest personality */ + unsigned char pers_high; /* highest personality */ + unsigned long *signal_map; /* signal mapping */ + unsigned long *signal_invmap; /* reverse signal mapping */ + struct map_segment *err_map; /* error mapping */ + struct map_segment *socktype_map; /* socket type mapping */ + struct map_segment *sockopt_map; /* socket option mapping */ + struct map_segment *af_map; /* address family mapping */ + struct module *module; /* module context of the ed. */ + struct exec_domain *next; /* linked list (internal) */ +}; + +/* + * Return the base personality without flags. + */ +#define personality(pers) (pers & PER_MASK) + +/* + * Personality of the currently running process. + */ +#define get_personality (current->personality) + +/* + * Change personality of the currently running process. + */ +#define set_personality(pers) \ + ((current->personality == pers) ? 0 : __set_personality(pers)) + +#endif /* _LINUX_PERSONALITY_H */ |