Linux-2.6.12-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!

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 */