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!

62 files changed, 3890 insertions, 0 deletions

diff --git a/arch/um/include/2_5compat.h b/arch/um/include/2_5compat.h
new file mode 100644
index 000000000000..abdb015a4d71
--- /dev/null
+++ b/arch/um/include/2_5compat.h
@@ -0,0 +1,24 @@
+/* 
+ * Copyright (C) 2001 Jeff Dike (jdike@karaya.com)
+ * Licensed under the GPL
+ */
+
+#ifndef __2_5_COMPAT_H__
+#define __2_5_COMPAT_H__
+
+#define INIT_HARDSECT(arr, maj, sizes)
+
+#define SET_PRI(task) do ; while(0)
+
+#endif
+
+/*
+ * Overrides for Emacs so that we follow Linus's tabbing style.
+ * Emacs will notice this stuff at the end of the file and automatically
+ * adjust the settings for this buffer only.  This must remain at the end
+ * of the file.
+ * ---------------------------------------------------------------------------
+ * Local variables:
+ * c-file-style: "linux"
+ * End:
+ */
diff --git a/arch/um/include/chan_kern.h b/arch/um/include/chan_kern.h
new file mode 100644
index 000000000000..da9a6717e7a4
--- /dev/null
+++ b/arch/um/include/chan_kern.h
@@ -0,0 +1,60 @@
+/* 
+ * Copyright (C) 2000, 2001 Jeff Dike (jdike@karaya.com)
+ * Licensed under the GPL
+ */
+
+#ifndef __CHAN_KERN_H__
+#define __CHAN_KERN_H__
+
+#include "linux/tty.h"
+#include "linux/list.h"
+#include "linux/console.h"
+#include "chan_user.h"
+#include "line.h"
+
+struct chan {
+        struct list_head list;
+        char *dev;
+        unsigned int primary:1;
+        unsigned int input:1;
+        unsigned int output:1;
+        unsigned int opened:1;
+        int fd;
+        enum chan_init_pri pri;
+        struct chan_ops *ops;
+        void *data;
+};
+
+extern void chan_interrupt(struct list_head *chans, struct work_struct *task,
+                           struct tty_struct *tty, int irq);
+extern int parse_chan_pair(char *str, struct list_head *chans, int pri, 
+                           int device, struct chan_opts *opts);
+extern int open_chan(struct list_head *chans);
+extern int write_chan(struct list_head *chans, const char *buf, int len,
+                             int write_irq);
+extern int console_write_chan(struct list_head *chans, const char *buf, 
+                              int len);
+extern int console_open_chan(struct line *line, struct console *co,
+                             struct chan_opts *opts);
+extern void close_chan(struct list_head *chans);
+extern void chan_enable_winch(struct list_head *chans, struct tty_struct *tty);
+extern void enable_chan(struct list_head *chans, struct tty_struct *tty);
+extern int chan_window_size(struct list_head *chans, 
+                             unsigned short *rows_out, 
+                             unsigned short *cols_out);
+extern int chan_out_fd(struct list_head *chans);
+extern int chan_config_string(struct list_head *chans, char *str, int size,
+                              char **error_out);
+
+#endif
+
+/*
+ * Overrides for Emacs so that we follow Linus's tabbing style.
+ * Emacs will notice this stuff at the end of the file and automatically
+ * adjust the settings for this buffer only.  This must remain at the end
+ * of the file.
+ * ---------------------------------------------------------------------------
+ * Local variables:
+ * c-file-style: "linux"
+ * End:
+ */
diff --git a/arch/um/include/chan_user.h b/arch/um/include/chan_user.h
new file mode 100644
index 000000000000..f77d9aa4c164
--- /dev/null
+++ b/arch/um/include/chan_user.h
@@ -0,0 +1,67 @@
+/* 
+ * Copyright (C) 2000, 2001 Jeff Dike (jdike@karaya.com)
+ * Licensed under the GPL
+ */
+
+#ifndef __CHAN_USER_H__
+#define __CHAN_USER_H__
+
+#include "init.h"
+
+struct chan_opts {
+        void (*announce)(char *dev_name, int dev);
+        char *xterm_title;
+        int raw;
+        unsigned long tramp_stack;
+        int in_kernel;
+};
+
+enum chan_init_pri { INIT_STATIC, INIT_ALL, INIT_ONE };
+
+struct chan_ops {
+        char *type;
+        void *(*init)(char *, int, struct chan_opts *);
+        int (*open)(int, int, int, void *, char **);
+        void (*close)(int, void *);
+        int (*read)(int, char *, void *);
+        int (*write)(int, const char *, int, void *);
+        int (*console_write)(int, const char *, int, void *);
+        int (*window_size)(int, void *, unsigned short *, unsigned short *);
+        void (*free)(void *);
+        int winch;
+};
+
+extern struct chan_ops fd_ops, null_ops, port_ops, pts_ops, pty_ops, tty_ops,
+        xterm_ops;
+
+extern void generic_close(int fd, void *unused);
+extern int generic_read(int fd, char *c_out, void *unused);
+extern int generic_write(int fd, const char *buf, int n, void *unused);
+extern int generic_console_write(int fd, const char *buf, int n, void *state);
+extern int generic_window_size(int fd, void *unused, unsigned short *rows_out,
+                               unsigned short *cols_out);
+extern void generic_free(void *data);
+
+struct tty_struct;
+extern void register_winch(int fd,  struct tty_struct *tty);
+extern void register_winch_irq(int fd, int tty_fd, int pid, struct tty_struct *tty);
+
+#define __channel_help(fn, prefix) \
+__uml_help(fn, prefix "[0-9]*=<channel description>\n" \
+"    Attach a console or serial line to a host channel.  See\n" \
+"    http://user-mode-linux.sourceforge.net/input.html for a complete\n" \
+"    description of this switch.\n\n" \
+);
+
+#endif
+
+/*
+ * Overrides for Emacs so that we follow Linus's tabbing style.
+ * Emacs will notice this stuff at the end of the file and automatically
+ * adjust the settings for this buffer only.  This must remain at the end
+ * of the file.
+ * ---------------------------------------------------------------------------
+ * Local variables:
+ * c-file-style: "linux"
+ * End:
+ */
diff --git a/arch/um/include/choose-mode.h b/arch/um/include/choose-mode.h
new file mode 100644
index 000000000000..8e6b62f5e9ac
--- /dev/null
+++ b/arch/um/include/choose-mode.h
@@ -0,0 +1,42 @@
+/* 
+ * Copyright (C) 2002 Jeff Dike (jdike@karaya.com)
+ * Licensed under the GPL
+ */
+
+#ifndef __CHOOSE_MODE_H__
+#define __CHOOSE_MODE_H__
+
+#include "uml-config.h"
+
+#if defined(UML_CONFIG_MODE_TT) && defined(UML_CONFIG_MODE_SKAS)
+#define CHOOSE_MODE(tt, skas) (mode_tt ? (tt) : (skas))
+
+#elif defined(UML_CONFIG_MODE_SKAS)
+#define CHOOSE_MODE(tt, skas) (skas)
+
+#elif defined(UML_CONFIG_MODE_TT)
+#define CHOOSE_MODE(tt, skas) (tt)
+#endif
+
+#define CHOOSE_MODE_PROC(tt, skas, args...) \
+        CHOOSE_MODE(tt(args), skas(args))
+
+extern int mode_tt;
+static inline void *__choose_mode(void *tt, void *skas) {
+        return mode_tt ? tt : skas;
+}
+
+#define __CHOOSE_MODE(tt, skas) (*( (typeof(tt) *) __choose_mode(&(tt), &(skas))))
+
+#endif
+
+/*
+ * Overrides for Emacs so that we follow Linus's tabbing style.
+ * Emacs will notice this stuff at the end of the file and automatically
+ * adjust the settings for this buffer only.  This must remain at the end
+ * of the file.
+ * ---------------------------------------------------------------------------
+ * Local variables:
+ * c-file-style: "linux"
+ * End:
+ */
diff --git a/arch/um/include/elf_user.h b/arch/um/include/elf_user.h
new file mode 100644
index 000000000000..53516b637272
--- /dev/null
+++ b/arch/um/include/elf_user.h
@@ -0,0 +1,19 @@
+/*
+ * Copyright (C) 2004 Fujitsu Siemens Computers GmbH
+ * Author: Bodo Stroesser <bstroesser@fujitsu-siemens.com>
+ * Licensed under the GPL
+ */
+
+#ifndef __ELF_USER_H__
+#define __ELF_USER_H__
+
+/* For compilation on a host that doesn't support AT_SYSINFO (Linux 2.4)  */
+
+#ifndef AT_SYSINFO
+#define AT_SYSINFO 32
+#endif
+#ifndef AT_SYSINFO_EHDR
+#define AT_SYSINFO_EHDR 33
+#endif
+
+#endif
diff --git a/arch/um/include/frame_kern.h b/arch/um/include/frame_kern.h
new file mode 100644
index 000000000000..ce9514f57211
--- /dev/null
+++ b/arch/um/include/frame_kern.h
@@ -0,0 +1,32 @@
+/* 
+ * Copyright (C) 2002 Jeff Dike (jdike@karaya.com)
+ * Licensed under the GPL
+ */
+
+#ifndef __FRAME_KERN_H_
+#define __FRAME_KERN_H_
+
+#define _S(nr) (1<<((nr)-1))
+#define _BLOCKABLE (~(_S(SIGKILL) | _S(SIGSTOP)))
+
+extern int setup_signal_stack_sc(unsigned long stack_top, int sig, 
+                                 struct k_sigaction *ka,
+                                 struct pt_regs *regs, 
+                                 sigset_t *mask);
+extern int setup_signal_stack_si(unsigned long stack_top, int sig, 
+                                 struct k_sigaction *ka,
+                                 struct pt_regs *regs, siginfo_t *info, 
+                                 sigset_t *mask);
+
+#endif
+
+/*
+ * Overrides for Emacs so that we follow Linus's tabbing style.
+ * Emacs will notice this stuff at the end of the file and automatically
+ * adjust the settings for this buffer only.  This must remain at the end
+ * of the file.
+ * ---------------------------------------------------------------------------
+ * Local variables:
+ * c-file-style: "linux"
+ * End:
+ */
diff --git a/arch/um/include/helper.h b/arch/um/include/helper.h
new file mode 100644
index 000000000000..162ac31192fd
--- /dev/null
+++ b/arch/um/include/helper.h
@@ -0,0 +1,27 @@
+/* 
+ * Copyright (C) 2002 Jeff Dike (jdike@karaya.com)
+ * Licensed under the GPL
+ */
+
+#ifndef __HELPER_H__
+#define __HELPER_H__
+
+extern int run_helper(void (*pre_exec)(void *), void *pre_data, char **argv,
+                      unsigned long *stack_out);
+extern int run_helper_thread(int (*proc)(void *), void *arg, 
+                             unsigned int flags, unsigned long *stack_out,
+                             int stack_order);
+extern int helper_wait(int pid);
+
+#endif
+
+/*
+ * Overrides for Emacs so that we follow Linus's tabbing style.
+ * Emacs will notice this stuff at the end of the file and automatically
+ * adjust the settings for this buffer only.  This must remain at the end
+ * of the file.
+ * ---------------------------------------------------------------------------
+ * Local variables:
+ * c-file-style: "linux"
+ * End:
+ */
diff --git a/arch/um/include/init.h b/arch/um/include/init.h
new file mode 100644
index 000000000000..55c2693f8778
--- /dev/null
+++ b/arch/um/include/init.h
@@ -0,0 +1,132 @@
+#ifndef _LINUX_UML_INIT_H
+#define _LINUX_UML_INIT_H
+
+/* These macros are used to mark some functions or
+ * initialized data (doesn't apply to uninitialized data)
+ * as `initialization' functions. The kernel can take this
+ * as hint that the function is used only during the initialization
+ * phase and free up used memory resources after
+ *
+ * Usage:
+ * For functions:
+ *
+ * You should add __init immediately before the function name, like:
+ *
+ * static void __init initme(int x, int y)
+ * {
+ *    extern int z; z = x * y;
+ * }
+ *
+ * If the function has a prototype somewhere, you can also add
+ * __init between closing brace of the prototype and semicolon:
+ *
+ * extern int initialize_foobar_device(int, int, int) __init;
+ *
+ * For initialized data:
+ * You should insert __initdata between the variable name and equal
+ * sign followed by value, e.g.:
+ *
+ * static int init_variable __initdata = 0;
+ * static char linux_logo[] __initdata = { 0x32, 0x36, ... };
+ *
+ * Don't forget to initialize data not at file scope, i.e. within a function,
+ * as gcc otherwise puts the data into the bss section and not into the init
+ * section.
+ *
+ * Also note, that this data cannot be "const".
+ */
+
+#ifndef _LINUX_INIT_H
+typedef int (*initcall_t)(void);
+typedef void (*exitcall_t)(void);
+
+/* These are for everybody (although not all archs will actually
+   discard it in modules) */
+#define __init          __attribute__ ((__section__ (".init.text")))
+#define __initdata      __attribute__ ((__section__ (".init.data")))
+#define __exitdata      __attribute__ ((__section__(".exit.data")))
+#define __exit_call     __attribute_used__ __attribute__ ((__section__ (".exitcall.exit")))
+
+#ifdef MODULE
+#define __exit          __attribute__ ((__section__(".exit.text")))
+#else
+#define __exit          __attribute_used__ __attribute__ ((__section__(".exit.text")))
+#endif
+
+#endif
+
+#ifndef MODULE
+struct uml_param {
+        const char *str;
+        int (*setup_func)(char *, int *);
+};
+
+extern initcall_t __uml_initcall_start, __uml_initcall_end;
+extern initcall_t __uml_postsetup_start, __uml_postsetup_end;
+extern const char *__uml_help_start, *__uml_help_end;
+#endif
+
+#define __uml_initcall(fn)                                              \
+        static initcall_t __uml_initcall_##fn __uml_init_call = fn
+
+#define __uml_exitcall(fn)                                              \
+        static exitcall_t __uml_exitcall_##fn __uml_exit_call = fn
+
+extern struct uml_param __uml_setup_start, __uml_setup_end;
+
+#define __uml_postsetup(fn)                                             \
+        static initcall_t __uml_postsetup_##fn __uml_postsetup_call = fn
+
+#define __non_empty_string(dummyname,string)                            \
+        struct __uml_non_empty_string_struct_##dummyname                \
+        {                                                               \
+                char _string[sizeof(string)-2];                         \
+        }
+
+#ifndef MODULE
+#define __uml_setup(str, fn, help...)                                   \
+        __non_empty_string(fn ##_setup, str);                           \
+        __uml_help(fn, help);                                           \
+        static char __uml_setup_str_##fn[] __initdata = str;            \
+        static struct uml_param __uml_setup_##fn __uml_init_setup = { __uml_setup_str_##fn, fn }
+#else
+#define __uml_setup(str, fn, help...)                                   \
+
+#endif
+
+#define __uml_help(fn, help...)                                         \
+        __non_empty_string(fn ##__help, help);                          \
+        static char __uml_help_str_##fn[] __initdata = help;            \
+        static const char *__uml_help_##fn __uml_setup_help = __uml_help_str_##fn
+
+/*
+ * Mark functions and data as being only used at initialization
+ * or exit time.
+ */
+#define __uml_init_setup        __attribute_used__ __attribute__ ((__section__ (".uml.setup.init")))
+#define __uml_setup_help        __attribute_used__ __attribute__ ((__section__ (".uml.help.init")))
+#define __uml_init_call         __attribute_used__ __attribute__ ((__section__ (".uml.initcall.init")))
+#define __uml_postsetup_call    __attribute_used__ __attribute__ ((__section__ (".uml.postsetup.init")))
+#define __uml_exit_call         __attribute_used__ __attribute__ ((__section__ (".uml.exitcall.exit")))
+
+#ifndef __KERNEL__
+
+#define __initcall(fn) static initcall_t __initcall_##fn __init_call = fn
+#define __exitcall(fn) static exitcall_t __exitcall_##fn __exit_call = fn
+
+#define __init_call __attribute__ ((unused,__section__ (".initcall.init")))
+
+#endif
+
+#endif /* _LINUX_UML_INIT_H */
+
+/*
+ * Overrides for Emacs so that we follow Linus's tabbing style.
+ * Emacs will notice this stuff at the end of the file and automatically
+ * adjust the settings for this buffer only.  This must remain at the end
+ * of the file.
+ * ---------------------------------------------------------------------------
+ * Local variables:
+ * c-file-style: "linux"
+ * End:
+ */
diff --git a/arch/um/include/initrd.h b/arch/um/include/initrd.h
new file mode 100644
index 000000000000..439b9a814985
--- /dev/null
+++ b/arch/um/include/initrd.h
@@ -0,0 +1,22 @@
+/*
+ * Copyright (C) 2000 Jeff Dike (jdike@karaya.com)
+ * Licensed under the GPL
+ */
+
+#ifndef __INITRD_USER_H__
+#define __INITRD_USER_H__
+
+extern int load_initrd(char *filename, void *buf, int size);
+
+#endif
+
+/*
+ * Overrides for Emacs so that we follow Linus's tabbing style.
+ * Emacs will notice this stuff at the end of the file and automatically
+ * adjust the settings for this buffer only.  This must remain at the end
+ * of the file.
+ * ---------------------------------------------------------------------------
+ * Local variables:
+ * c-file-style: "linux"
+ * End:
+ */
diff --git a/arch/um/include/irq_kern.h b/arch/um/include/irq_kern.h
new file mode 100644
index 000000000000..3af52a634c4c
--- /dev/null
+++ b/arch/um/include/irq_kern.h
@@ -0,0 +1,28 @@
+/*
+ * Copyright (C) 2001, 2002 Jeff Dike (jdike@karaya.com)
+ * Licensed under the GPL
+ */
+
+#ifndef __IRQ_KERN_H__
+#define __IRQ_KERN_H__
+
+#include "linux/interrupt.h"
+
+extern int um_request_irq(unsigned int irq, int fd, int type,
+                          irqreturn_t (*handler)(int, void *,
+                                                 struct pt_regs *),
+                          unsigned long irqflags,  const char * devname,
+                          void *dev_id);
+
+#endif
+
+/*
+ * Overrides for Emacs so that we follow Linus's tabbing style.
+ * Emacs will notice this stuff at the end of the file and automatically
+ * adjust the settings for this buffer only.  This must remain at the end
+ * of the file.
+ * ---------------------------------------------------------------------------
+ * Local variables:
+ * c-file-style: "linux"
+ * End:
+ */
diff --git a/arch/um/include/irq_user.h b/arch/um/include/irq_user.h
new file mode 100644
index 000000000000..f724b717213f
--- /dev/null
+++ b/arch/um/include/irq_user.h
@@ -0,0 +1,36 @@
+/* 
+ * Copyright (C) 2001, 2002 Jeff Dike (jdike@karaya.com)
+ * Licensed under the GPL
+ */
+
+#ifndef __IRQ_USER_H__
+#define __IRQ_USER_H__
+
+enum { IRQ_READ, IRQ_WRITE };
+
+extern void sigio_handler(int sig, union uml_pt_regs *regs);
+extern int activate_fd(int irq, int fd, int type, void *dev_id);
+extern void free_irq_by_irq_and_dev(unsigned int irq, void *dev_id);
+extern void free_irq_by_fd(int fd);
+extern void reactivate_fd(int fd, int irqnum);
+extern void deactivate_fd(int fd, int irqnum);
+extern int deactivate_all_fds(void);
+extern void forward_interrupts(int pid);
+extern void init_irq_signals(int on_sigstack);
+extern void forward_ipi(int fd, int pid);
+extern void free_irq_later(int irq, void *dev_id);
+extern int activate_ipi(int fd, int pid);
+extern unsigned long irq_lock(void);
+extern void irq_unlock(unsigned long flags);
+#endif
+
+/*
+ * Overrides for Emacs so that we follow Linus's tabbing style.
+ * Emacs will notice this stuff at the end of the file and automatically
+ * adjust the settings for this buffer only.  This must remain at the end
+ * of the file.
+ * ---------------------------------------------------------------------------
+ * Local variables:
+ * c-file-style: "linux"
+ * End:
+ */
diff --git a/arch/um/include/kern.h b/arch/um/include/kern.h
new file mode 100644
index 000000000000..1e3170768b5c
--- /dev/null
+++ b/arch/um/include/kern.h
@@ -0,0 +1,49 @@
+/* 
+ * Copyright (C) 2000 Jeff Dike (jdike@karaya.com)
+ * Licensed under the GPL
+ */
+
+#ifndef __KERN_H__
+#define __KERN_H__
+
+/* These are all user-mode things which are convenient to call directly
+ * from kernel code and for which writing a wrapper is too much of a pain.
+ * The regular include files can't be included because this file is included
+ * only into kernel code, and user-space includes conflict with kernel
+ * includes.
+ */
+
+extern int errno;
+
+extern int clone(int (*proc)(void *), void *sp, int flags, void *data);
+extern int sleep(int);
+extern int printf(char *fmt, ...);
+extern char *strerror(int errnum);
+extern char *ptsname(int __fd);
+extern int munmap(void *, int);
+extern void *sbrk(int increment);
+extern void *malloc(int size);
+extern void perror(char *err);
+extern int kill(int pid, int sig);
+extern int getuid(void);
+extern int getgid(void);
+extern int pause(void);
+extern int write(int, const void *, int);
+extern int exit(int);
+extern int close(int);
+extern int read(unsigned int, char *, int);
+extern int pipe(int *);
+extern int sched_yield(void);
+extern int ptrace(int op, int pid, long addr, long data);
+#endif
+
+/*
+ * Overrides for Emacs so that we follow Linus's tabbing style.
+ * Emacs will notice this stuff at the end of the file and automatically
+ * adjust the settings for this buffer only.  This must remain at the end
+ * of the file.
+ * ---------------------------------------------------------------------------
+ * Local variables:
+ * c-file-style: "linux"
+ * End:
+ */
diff --git a/arch/um/include/kern_util.h b/arch/um/include/kern_util.h
new file mode 100644
index 000000000000..15389c886b41
--- /dev/null
+++ b/arch/um/include/kern_util.h
@@ -0,0 +1,125 @@
+/* 
+ * Copyright (C) 2000, 2001, 2002 Jeff Dike (jdike@karaya.com)
+ * Licensed under the GPL
+ */
+
+#ifndef __KERN_UTIL_H__
+#define __KERN_UTIL_H__
+
+#include "linux/threads.h"
+#include "sysdep/ptrace.h"
+
+extern int ncpus;
+extern char *linux_prog;
+extern char *gdb_init;
+extern int kmalloc_ok;
+extern int timer_irq_inited;
+extern int jail;
+extern int nsyscalls;
+
+extern struct task_struct *idle_threads[NR_CPUS];
+
+#define UML_ROUND_DOWN(addr) ((void *)(((unsigned long) addr) & PAGE_MASK))
+#define UML_ROUND_UP(addr) \
+        UML_ROUND_DOWN(((unsigned long) addr) + PAGE_SIZE - 1)
+
+extern int kernel_fork(unsigned long flags, int (*fn)(void *), void * arg);
+extern unsigned long stack_sp(unsigned long page);
+extern int kernel_thread_proc(void *data);
+extern void syscall_segv(int sig);
+extern int current_pid(void);
+extern unsigned long alloc_stack(int order, int atomic);
+extern int do_signal(void);
+extern int is_stack_fault(unsigned long sp);
+extern unsigned long segv(unsigned long address, unsigned long ip, 
+                          int is_write, int is_user, void *sc);
+extern int handle_page_fault(unsigned long address, unsigned long ip,
+                             int is_write, int is_user, int *code_out);
+extern void syscall_ready(void);
+extern void set_tracing(void *t, int tracing);
+extern int is_tracing(void *task);
+extern int segv_syscall(void);
+extern void kern_finish_exec(void *task, int new_pid, unsigned long stack);
+extern int page_size(void);
+extern unsigned long page_mask(void);
+extern int need_finish_fork(void);
+extern void free_stack(unsigned long stack, int order);
+extern void add_input_request(int op, void (*proc)(int), void *arg);
+extern char *current_cmd(void);
+extern void timer_handler(int sig, union uml_pt_regs *regs);
+extern int set_signals(int enable);
+extern void force_sigbus(void);
+extern int pid_to_processor_id(int pid);
+extern void block_signals(void);
+extern void unblock_signals(void);
+extern void deliver_signals(void *t);
+extern int next_syscall_index(int max);
+extern int next_trap_index(int max);
+extern void default_idle(void);
+extern void finish_fork(void);
+extern void paging_init(void);
+extern void init_flush_vm(void);
+extern void *syscall_sp(void *t);
+extern void syscall_trace(union uml_pt_regs *regs, int entryexit);
+extern int hz(void);
+extern void uml_idle_timer(void);
+extern unsigned int do_IRQ(int irq, union uml_pt_regs *regs);
+extern int external_pid(void *t);
+extern void boot_timer_handler(int sig);
+extern void interrupt_end(void);
+extern void initial_thread_cb(void (*proc)(void *), void *arg);
+extern int debugger_signal(int status, int pid);
+extern void debugger_parent_signal(int status, int pid);
+extern void child_signal(int pid, int status);
+extern int init_ptrace_proxy(int idle_pid, int startup, int stop);
+extern int init_parent_proxy(int pid);
+extern int singlestepping(void *t);
+extern void check_stack_overflow(void *ptr);
+extern void relay_signal(int sig, union uml_pt_regs *regs);
+extern void not_implemented(void);
+extern int user_context(unsigned long sp);
+extern void timer_irq(union uml_pt_regs *regs);
+extern void unprotect_stack(unsigned long stack);
+extern void do_uml_exitcalls(void);
+extern int attach_debugger(int idle_pid, int pid, int stop);
+extern void bad_segv(unsigned long address, unsigned long ip, int is_write);
+extern int config_gdb(char *str);
+extern int remove_gdb(void);
+extern char *uml_strdup(char *string);
+extern void unprotect_kernel_mem(void);
+extern void protect_kernel_mem(void);
+extern void uml_cleanup(void);
+extern void set_current(void *t);
+extern void lock_signalled_task(void *t);
+extern void IPI_handler(int cpu);
+extern int jail_setup(char *line, int *add);
+extern void *get_init_task(void);
+extern int clear_user_proc(void *buf, int size);
+extern int copy_to_user_proc(void *to, void *from, int size);
+extern int copy_from_user_proc(void *to, void *from, int size);
+extern int strlen_user_proc(char *str);
+extern void bus_handler(int sig, union uml_pt_regs *regs);
+extern void winch(int sig, union uml_pt_regs *regs);
+extern long execute_syscall(void *r);
+extern int smp_sigio_handler(void);
+extern void *get_current(void);
+extern struct task_struct *get_task(int pid, int require);
+extern void machine_halt(void);
+extern int is_syscall(unsigned long addr);
+extern void arch_switch(void);
+extern void free_irq(unsigned int, void *);
+extern int um_in_interrupt(void);
+extern int cpu(void);
+
+#endif
+
+/*
+ * Overrides for Emacs so that we follow Linus's tabbing style.
+ * Emacs will notice this stuff at the end of the file and automatically
+ * adjust the settings for this buffer only.  This must remain at the end
+ * of the file.
+ * ---------------------------------------------------------------------------
+ * Local variables:
+ * c-file-style: "linux"
+ * End:
+ */
diff --git a/arch/um/include/line.h b/arch/um/include/line.h
new file mode 100644
index 000000000000..6d81ecc17be5
--- /dev/null
+++ b/arch/um/include/line.h
@@ -0,0 +1,108 @@
+/* 
+ * Copyright (C) 2001, 2002 Jeff Dike (jdike@karaya.com)
+ * Licensed under the GPL
+ */
+
+#ifndef __LINE_H__
+#define __LINE_H__
+
+#include "linux/list.h"
+#include "linux/workqueue.h"
+#include "linux/tty.h"
+#include "linux/interrupt.h"
+#include "asm/semaphore.h"
+#include "chan_user.h"
+#include "mconsole_kern.h"
+
+struct line_driver {
+        char *name;
+        char *device_name;
+        char *devfs_name;
+        short major;
+        short minor_start;
+        short type;
+        short subtype;
+        int read_irq;
+        char *read_irq_name;
+        int write_irq;
+        char *write_irq_name;
+        char *symlink_from;
+        char *symlink_to;
+        struct mc_device mc;
+};
+
+struct line {
+        char *init_str;
+        int init_pri;
+        struct list_head chan_list;
+        int valid;
+        int count;
+        struct semaphore sem;
+        char *buffer;
+        char *head;
+        char *tail;
+        int sigio;
+        struct work_struct task;
+        struct line_driver *driver;
+        int have_irq;
+};
+
+#define LINE_INIT(str, d) \
+        { init_str :    str, \
+          init_pri :    INIT_STATIC, \
+          chan_list :   { }, \
+          valid :       1, \
+          sem :         { }, \
+          buffer :      NULL, \
+          head :        NULL, \
+          tail :        NULL, \
+          sigio :       0, \
+          driver :      d, \
+          have_irq :    0 }
+
+struct lines {
+        int num;
+};
+
+#define LINES_INIT(n) {  num :          n }
+
+extern void line_close(struct tty_struct *tty, struct file * filp);
+extern int line_open(struct line *lines, struct tty_struct *tty, 
+                     struct chan_opts *opts);
+extern int line_setup(struct line *lines, int num, char *init, 
+                      int all_allowed);
+extern int line_write(struct tty_struct *tty, const unsigned char *buf, int len);
+extern void line_put_char(struct tty_struct *tty, unsigned char ch);
+extern void line_set_termios(struct tty_struct *tty, struct termios * old);
+extern int line_chars_in_buffer(struct tty_struct *tty);
+extern int line_write_room(struct tty_struct *tty);
+extern int line_ioctl(struct tty_struct *tty, struct file * file,
+                      unsigned int cmd, unsigned long arg);
+extern char *add_xterm_umid(char *base);
+extern int line_setup_irq(int fd, int input, int output, struct tty_struct *tty);
+extern void line_close_chan(struct line *line);
+extern void line_disable(struct tty_struct *tty, int current_irq);
+extern struct tty_driver * line_register_devfs(struct lines *set, 
+                                struct line_driver *line_driver, 
+                                struct tty_operations *driver,
+                                struct line *lines,
+                                int nlines);
+extern void lines_init(struct line *lines, int nlines);
+extern void close_lines(struct line *lines, int nlines);
+extern int line_config(struct line *lines, int num, char *str);
+extern int line_remove(struct line *lines, int num, char *str);
+extern int line_get_config(char *dev, struct line *lines, int num, char *str, 
+                           int size, char **error_out);
+
+#endif
+
+/*
+ * Overrides for Emacs so that we follow Linus's tabbing style.
+ * Emacs will notice this stuff at the end of the file and automatically
+ * adjust the settings for this buffer only.  This must remain at the end
+ * of the file.
+ * ---------------------------------------------------------------------------
+ * Local variables:
+ * c-file-style: "linux"
+ * End:
+ */
diff --git a/arch/um/include/mconsole.h b/arch/um/include/mconsole.h
new file mode 100644
index 000000000000..9fbe3083fdd8
--- /dev/null
+++ b/arch/um/include/mconsole.h
@@ -0,0 +1,103 @@
+/*
+ * Copyright (C) 2001 Lennert Buytenhek (buytenh@gnu.org)
+ * Copyright (C) 2001, 2002 Jeff Dike (jdike@karaya.com)
+ * Licensed under the GPL
+ */
+
+#ifndef __MCONSOLE_H__
+#define __MCONSOLE_H__
+
+#ifndef __KERNEL__
+#include <stdint.h>
+#define u32 uint32_t
+#endif
+
+#define MCONSOLE_MAGIC (0xcafebabe)
+#define MCONSOLE_MAX_DATA (512)
+#define MCONSOLE_VERSION 2
+
+struct mconsole_request {
+        u32 magic;
+        u32 version;
+        u32 len;
+        char data[MCONSOLE_MAX_DATA];
+};
+
+struct mconsole_reply {
+        u32 err;
+        u32 more;
+        u32 len;
+        char data[MCONSOLE_MAX_DATA];
+};
+
+struct mconsole_notify {
+        u32 magic;
+        u32 version;    
+        enum { MCONSOLE_SOCKET, MCONSOLE_PANIC, MCONSOLE_HANG,
+               MCONSOLE_USER_NOTIFY } type;
+        u32 len;
+        char data[MCONSOLE_MAX_DATA];
+};
+
+struct mc_request;
+
+enum mc_context { MCONSOLE_INTR, MCONSOLE_PROC };
+
+struct mconsole_command
+{
+        char *command;
+        void (*handler)(struct mc_request *req);
+        enum mc_context context;
+};
+
+struct mc_request
+{
+        int len;
+        int as_interrupt;
+
+        int originating_fd;
+        int originlen;
+        unsigned char origin[128];                      /* sockaddr_un */
+
+        struct mconsole_request request;
+        struct mconsole_command *cmd;
+};
+
+extern char mconsole_socket_name[];
+
+extern int mconsole_unlink_socket(void);
+extern int mconsole_reply(struct mc_request *req, char *reply, int err,
+                          int more);
+
+extern void mconsole_version(struct mc_request *req);
+extern void mconsole_help(struct mc_request *req);
+extern void mconsole_halt(struct mc_request *req);
+extern void mconsole_reboot(struct mc_request *req);
+extern void mconsole_config(struct mc_request *req);
+extern void mconsole_remove(struct mc_request *req);
+extern void mconsole_sysrq(struct mc_request *req);
+extern void mconsole_cad(struct mc_request *req);
+extern void mconsole_stop(struct mc_request *req);
+extern void mconsole_go(struct mc_request *req);
+extern void mconsole_log(struct mc_request *req);
+extern void mconsole_proc(struct mc_request *req);
+
+extern int mconsole_get_request(int fd, struct mc_request *req);
+extern int mconsole_notify(char *sock_name, int type, const void *data, 
+                           int len);
+extern char *mconsole_notify_socket(void);
+extern void lock_notify(void);
+extern void unlock_notify(void);
+
+#endif
+
+/*
+ * Overrides for Emacs so that we follow Linus's tabbing style.
+ * Emacs will notice this stuff at the end of the file and automatically
+ * adjust the settings for this buffer only.  This must remain at the end
+ * of the file.
+ * ---------------------------------------------------------------------------
+ * Local variables:
+ * c-file-style: "linux"
+ * End:
+ */
diff --git a/arch/um/include/mconsole_kern.h b/arch/um/include/mconsole_kern.h
new file mode 100644
index 000000000000..61c274fcee5d
--- /dev/null
+++ b/arch/um/include/mconsole_kern.h
@@ -0,0 +1,62 @@
+/*
+ * Copyright (C) 2001, 2002 Jeff Dike (jdike@karaya.com)
+ * Licensed under the GPL
+ */
+
+#ifndef __MCONSOLE_KERN_H__
+#define __MCONSOLE_KERN_H__
+
+#include "linux/config.h"
+#include "linux/list.h"
+#include "mconsole.h"
+
+struct mconsole_entry {
+        struct list_head list;
+        struct mc_request request;
+};
+
+struct mc_device {
+        struct list_head list;
+        char *name;
+        int (*config)(char *);
+        int (*get_config)(char *, char *, int, char **);
+        int (*remove)(char *);
+};
+
+#define CONFIG_CHUNK(str, size, current, chunk, end) \
+do { \
+        current += strlen(chunk); \
+        if(current >= size) \
+                str = NULL; \
+        if(str != NULL){ \
+                strcpy(str, chunk); \
+                str += strlen(chunk); \
+        } \
+        if(end) \
+                current++; \
+} while(0)
+
+#ifdef CONFIG_MCONSOLE
+
+extern void mconsole_register_dev(struct mc_device *new);
+
+#else
+
+static inline void mconsole_register_dev(struct mc_device *new)
+{
+}
+
+#endif
+
+#endif
+
+/*
+ * Overrides for Emacs so that we follow Linus's tabbing style.
+ * Emacs will notice this stuff at the end of the file and automatically
+ * adjust the settings for this buffer only.  This must remain at the end
+ * of the file.
+ * ---------------------------------------------------------------------------
+ * Local variables:
+ * c-file-style: "linux"
+ * End:
+ */
diff --git a/arch/um/include/mem.h b/arch/um/include/mem.h
new file mode 100644
index 000000000000..10c46c38949a
--- /dev/null
+++ b/arch/um/include/mem.h
@@ -0,0 +1,28 @@
+/* 
+ * Copyright (C) 2002, 2003 Jeff Dike (jdike@addtoit.com)
+ * Licensed under the GPL
+ */
+
+#ifndef __MEM_H__
+#define __MEM_H__
+
+#include "linux/types.h"
+
+extern int phys_mapping(unsigned long phys, __u64 *offset_out);
+extern int physmem_subst_mapping(void *virt, int fd, __u64 offset, int w);
+extern int is_remapped(void *virt);
+extern int physmem_remove_mapping(void *virt);
+extern void physmem_forget_descriptor(int fd);
+
+#endif
+
+/*
+ * Overrides for Emacs so that we follow Linus's tabbing style.
+ * Emacs will notice this stuff at the end of the file and automatically
+ * adjust the settings for this buffer only.  This must remain at the end
+ * of the file.
+ * ---------------------------------------------------------------------------
+ * Local variables:
+ * c-file-style: "linux"
+ * End:
+ */
diff --git a/arch/um/include/mem_kern.h b/arch/um/include/mem_kern.h
new file mode 100644
index 000000000000..cb7e196d366b
--- /dev/null
+++ b/arch/um/include/mem_kern.h
@@ -0,0 +1,30 @@
+/*
+ * Copyright (C) 2003 Jeff Dike (jdike@addtoit.com)
+ * Licensed under the GPL
+ */
+
+#ifndef __MEM_KERN_H__
+#define __MEM_KERN_H__
+
+#include "linux/list.h"
+#include "linux/types.h"
+
+struct remapper {
+        struct list_head list;
+        int (*proc)(int, unsigned long, int, __u64);
+};
+
+extern void register_remapper(struct remapper *info);
+
+#endif
+
+/*
+ * Overrides for Emacs so that we follow Linus's tabbing style.
+ * Emacs will notice this stuff at the end of the file and automatically
+ * adjust the settings for this buffer only.  This must remain at the end
+ * of the file.
+ * ---------------------------------------------------------------------------
+ * Local variables:
+ * c-file-style: "linux"
+ * End:
+ */
diff --git a/arch/um/include/mem_user.h b/arch/um/include/mem_user.h
new file mode 100644
index 000000000000..d6404bb64662
--- /dev/null
+++ b/arch/um/include/mem_user.h
@@ -0,0 +1,83 @@
+/*
+ * arch/um/include/mem_user.h
+ *
+ * BRIEF MODULE DESCRIPTION
+ * user side memory interface for support IO memory inside user mode linux
+ *
+ * Copyright (C) 2001 RidgeRun, Inc.
+ * Author: RidgeRun, Inc.
+ *         Greg Lonnon glonnon@ridgerun.com or info@ridgerun.com
+ *
+ *  This program is free software; you can redistribute  it and/or modify it
+ *  under  the terms of  the GNU General  Public License as published by the
+ *  Free Software Foundation;  either version 2 of the  License, or (at your
+ *  option) any later version.
+ *
+ *  THIS  SOFTWARE  IS PROVIDED   ``AS  IS'' AND   ANY  EXPRESS OR IMPLIED
+ *  WARRANTIES,   INCLUDING, BUT NOT  LIMITED  TO, THE IMPLIED WARRANTIES OF
+ *  MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.  IN
+ *  NO  EVENT  SHALL   THE AUTHOR  BE    LIABLE FOR ANY   DIRECT, INDIRECT,
+ *  INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+ *  NOT LIMITED   TO, PROCUREMENT OF  SUBSTITUTE GOODS  OR SERVICES; LOSS OF
+ *  USE, DATA,  OR PROFITS; OR  BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
+ *  ANY THEORY OF LIABILITY, WHETHER IN  CONTRACT, STRICT LIABILITY, OR TORT
+ *  (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
+ *  THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ *  You should have received a copy of the  GNU General Public License along
+ *  with this program; if not, write  to the Free Software Foundation, Inc.,
+ *  675 Mass Ave, Cambridge, MA 02139, USA.
+ */
+
+#ifndef _MEM_USER_H
+#define _MEM_USER_H
+
+struct iomem_region {
+        struct iomem_region *next;
+        char *driver;
+        int fd;
+        int size;
+        unsigned long phys;
+        unsigned long virt;
+};
+
+extern struct iomem_region *iomem_regions;
+extern int iomem_size;
+
+#define ROUND_4M(n) ((((unsigned long) (n)) + (1 << 22)) & ~((1 << 22) - 1))
+
+extern unsigned long host_task_size;
+extern unsigned long task_size;
+
+extern void check_devanon(void);
+extern int init_mem_user(void);
+extern int create_mem_file(unsigned long len);
+extern void setup_memory(void *entry);
+extern unsigned long find_iomem(char *driver, unsigned long *len_out);
+extern int init_maps(unsigned long physmem, unsigned long iomem,
+                     unsigned long highmem);
+extern unsigned long get_vm(unsigned long len);
+extern void setup_physmem(unsigned long start, unsigned long usable,
+                          unsigned long len, unsigned long highmem);
+extern void add_iomem(char *name, int fd, unsigned long size);
+extern unsigned long phys_offset(unsigned long phys);
+extern void unmap_physmem(void);
+extern void map_memory(unsigned long virt, unsigned long phys,
+                       unsigned long len, int r, int w, int x);
+extern int protect_memory(unsigned long addr, unsigned long len, 
+                          int r, int w, int x, int must_succeed);
+extern unsigned long get_kmem_end(void);
+extern void check_tmpexec(void);
+
+#endif
+
+/*
+ * Overrides for Emacs so that we follow Linus's tabbing style.
+ * Emacs will notice this stuff at the end of the file and automatically
+ * adjust the settings for this buffer only.  This must remain at the end
+ * of the file.
+ * ---------------------------------------------------------------------------
+ * Local variables:
+ * c-file-style: "linux"
+ * End:
+ */
diff --git a/arch/um/include/mode.h b/arch/um/include/mode.h
new file mode 100644
index 000000000000..786cf563eb05
--- /dev/null
+++ b/arch/um/include/mode.h
@@ -0,0 +1,30 @@
+/* 
+ * Copyright (C) 2002 Jeff Dike (jdike@karaya.com)
+ * Licensed under the GPL
+ */
+
+#ifndef __MODE_H__
+#define __MODE_H__
+
+#include "uml-config.h"
+
+#ifdef UML_CONFIG_MODE_TT
+#include "mode-tt.h"
+#endif
+
+#ifdef UML_CONFIG_MODE_SKAS
+#include "mode-skas.h"
+#endif
+
+#endif
+
+/*
+ * Overrides for Emacs so that we follow Linus's tabbing style.
+ * Emacs will notice this stuff at the end of the file and automatically
+ * adjust the settings for this buffer only.  This must remain at the end
+ * of the file.
+ * ---------------------------------------------------------------------------
+ * Local variables:
+ * c-file-style: "linux"
+ * End:
+ */
diff --git a/arch/um/include/mode_kern.h b/arch/um/include/mode_kern.h
new file mode 100644
index 000000000000..2d88afd0cf16
--- /dev/null
+++ b/arch/um/include/mode_kern.h
@@ -0,0 +1,30 @@
+/* 
+ * Copyright (C) 2002 Jeff Dike (jdike@karaya.com)
+ * Licensed under the GPL
+ */
+
+#ifndef __MODE_KERN_H__
+#define __MODE_KERN_H__
+
+#include "linux/config.h"
+
+#ifdef CONFIG_MODE_TT
+#include "mode_kern-tt.h"
+#endif
+
+#ifdef CONFIG_MODE_SKAS
+#include "mode_kern-skas.h"
+#endif
+
+#endif
+
+/*
+ * Overrides for Emacs so that we follow Linus's tabbing style.
+ * Emacs will notice this stuff at the end of the file and automatically
+ * adjust the settings for this buffer only.  This must remain at the end
+ * of the file.
+ * ---------------------------------------------------------------------------
+ * Local variables:
+ * c-file-style: "linux"
+ * End:
+ */
diff --git a/arch/um/include/net_kern.h b/arch/um/include/net_kern.h
new file mode 100644
index 000000000000..1c07949a13d6
--- /dev/null
+++ b/arch/um/include/net_kern.h
@@ -0,0 +1,82 @@
+/* 
+ * Copyright (C) 2002 Jeff Dike (jdike@karaya.com)
+ * Licensed under the GPL
+ */
+
+#ifndef __UM_NET_KERN_H
+#define __UM_NET_KERN_H
+
+#include "linux/netdevice.h"
+#include "linux/skbuff.h"
+#include "linux/socket.h"
+#include "linux/list.h"
+
+struct uml_net {
+        struct list_head list;
+        struct net_device *dev;
+        struct platform_device pdev;
+        int index;
+        unsigned char mac[ETH_ALEN];
+        int have_mac;
+};
+
+struct uml_net_private {
+        struct list_head list;
+        spinlock_t lock;
+        struct net_device *dev;
+        struct timer_list tl;
+        struct net_device_stats stats;
+        int fd;
+        unsigned char mac[ETH_ALEN];
+        int have_mac;
+        unsigned short (*protocol)(struct sk_buff *);
+        int (*open)(void *);
+        void (*close)(int, void *);
+        void (*remove)(void *);
+        int (*read)(int, struct sk_buff **skb, struct uml_net_private *);
+        int (*write)(int, struct sk_buff **skb, struct uml_net_private *);
+        
+        void (*add_address)(unsigned char *, unsigned char *, void *);
+        void (*delete_address)(unsigned char *, unsigned char *, void *);
+        int (*set_mtu)(int mtu, void *);
+        int user[1];
+};
+
+struct net_kern_info {
+        void (*init)(struct net_device *, void *);
+        unsigned short (*protocol)(struct sk_buff *);
+        int (*read)(int, struct sk_buff **skb, struct uml_net_private *);
+        int (*write)(int, struct sk_buff **skb, struct uml_net_private *);
+};
+
+struct transport {
+        struct list_head list;
+        char *name;
+        int (*setup)(char *, char **, void *);
+        struct net_user_info *user;
+        struct net_kern_info *kern;
+        int private_size;
+        int setup_size;
+};
+
+extern struct net_device *ether_init(int);
+extern unsigned short ether_protocol(struct sk_buff *);
+extern int setup_etheraddr(char *str, unsigned char *addr);
+extern struct sk_buff *ether_adjust_skb(struct sk_buff *skb, int extra);
+extern int tap_setup_common(char *str, char *type, char **dev_name, 
+                            char **mac_out, char **gate_addr);
+extern void register_transport(struct transport *new);
+extern unsigned short eth_protocol(struct sk_buff *skb);
+
+#endif
+
+/*
+ * Overrides for Emacs so that we follow Linus's tabbing style.
+ * Emacs will notice this stuff at the end of the file and automatically
+ * adjust the settings for this buffer only.  This must remain at the end
+ * of the file.
+ * ---------------------------------------------------------------------------
+ * Local variables:
+ * c-file-style: "linux"
+ * End:
+ */
diff --git a/arch/um/include/net_user.h b/arch/um/include/net_user.h
new file mode 100644
index 000000000000..36807b796e9f
--- /dev/null
+++ b/arch/um/include/net_user.h
@@ -0,0 +1,66 @@
+/* 
+ * Copyright (C) 2002 Jeff Dike (jdike@karaya.com)
+ * Licensed under the GPL
+ */
+
+#ifndef __UM_NET_USER_H__
+#define __UM_NET_USER_H__
+
+#define ETH_ADDR_LEN (6)
+#define ETH_HEADER_ETHERTAP (16)
+#define ETH_HEADER_OTHER (14)
+#define ETH_MAX_PACKET (1500)
+
+#define UML_NET_VERSION (4)
+
+struct net_user_info {
+        void (*init)(void *, void *);
+        int (*open)(void *);
+        void (*close)(int, void *);
+        void (*remove)(void *);
+        int (*set_mtu)(int mtu, void *);
+        void (*add_address)(unsigned char *, unsigned char *, void *);
+        void (*delete_address)(unsigned char *, unsigned char *, void *);
+        int max_packet;
+};
+
+extern void ether_user_init(void *data, void *dev);
+extern void dev_ip_addr(void *d, char *buf, char *bin_buf);
+extern void set_ether_mac(void *d, unsigned char *addr);
+extern void iter_addresses(void *d, void (*cb)(unsigned char *, 
+                                               unsigned char *, void *), 
+                           void *arg);
+
+extern void *get_output_buffer(int *len_out);
+extern void free_output_buffer(void *buffer);
+
+extern int tap_open_common(void *dev, char *gate_addr);
+extern void tap_check_ips(char *gate_addr, char *eth_addr);
+
+extern void read_output(int fd, char *output_out, int len);
+
+extern int net_read(int fd, void *buf, int len);
+extern int net_recvfrom(int fd, void *buf, int len);
+extern int net_write(int fd, void *buf, int len);
+extern int net_send(int fd, void *buf, int len);
+extern int net_sendto(int fd, void *buf, int len, void *to, int sock_len);
+
+extern void open_addr(unsigned char *addr, unsigned char *netmask, void *arg);
+extern void close_addr(unsigned char *addr, unsigned char *netmask, void *arg);
+
+extern char *split_if_spec(char *str, ...);
+
+extern int dev_netmask(void *d, void *m);
+
+#endif
+
+/*
+ * Overrides for Emacs so that we follow Linus's tabbing style.
+ * Emacs will notice this stuff at the end of the file and automatically
+ * adjust the settings for this buffer only.  This must remain at the end
+ * of the file.
+ * ---------------------------------------------------------------------------
+ * Local variables:
+ * c-file-style: "linux"
+ * End:
+ */
diff --git a/arch/um/include/os.h b/arch/um/include/os.h
new file mode 100644
index 000000000000..07340c8cf203
--- /dev/null
+++ b/arch/um/include/os.h
@@ -0,0 +1,183 @@
+/* 
+ * Copyright (C) 2002 Jeff Dike (jdike@karaya.com)
+ * Licensed under the GPL
+ */
+
+#ifndef __OS_H__
+#define __OS_H__
+
+#include "asm/types.h"
+#include "../os/include/file.h"
+
+#define OS_TYPE_FILE 1 
+#define OS_TYPE_DIR 2 
+#define OS_TYPE_SYMLINK 3 
+#define OS_TYPE_CHARDEV 4
+#define OS_TYPE_BLOCKDEV 5
+#define OS_TYPE_FIFO 6
+#define OS_TYPE_SOCK 7
+
+/* os_access() flags */
+#define OS_ACC_F_OK    0       /* Test for existence.  */
+#define OS_ACC_X_OK    1       /* Test for execute permission.  */
+#define OS_ACC_W_OK    2       /* Test for write permission.  */
+#define OS_ACC_R_OK    4       /* Test for read permission.  */
+#define OS_ACC_RW_OK   (OS_ACC_W_OK | OS_ACC_R_OK) /* Test for RW permission */
+
+/*
+ * types taken from stat_file() in hostfs_user.c
+ * (if they are wrong here, they are wrong there...).
+ */
+struct uml_stat {
+        int                ust_dev;        /* device */
+        unsigned long long ust_ino;        /* inode */
+        int                ust_mode;       /* protection */
+        int                ust_nlink;      /* number of hard links */
+        int                ust_uid;        /* user ID of owner */
+        int                ust_gid;        /* group ID of owner */
+        unsigned long long ust_size;       /* total size, in bytes */
+        int                ust_blksize;    /* blocksize for filesystem I/O */
+        unsigned long long ust_blocks;     /* number of blocks allocated */
+        unsigned long      ust_atime;      /* time of last access */
+        unsigned long      ust_mtime;      /* time of last modification */
+        unsigned long      ust_ctime;      /* time of last change */
+};
+
+struct openflags {
+        unsigned int r : 1;
+        unsigned int w : 1;
+        unsigned int s : 1;     /* O_SYNC */
+        unsigned int c : 1;     /* O_CREAT */
+        unsigned int t : 1;     /* O_TRUNC */
+        unsigned int a : 1;     /* O_APPEND */
+        unsigned int e : 1;     /* O_EXCL */
+        unsigned int cl : 1;    /* FD_CLOEXEC */
+};
+
+#define OPENFLAGS() ((struct openflags) { .r = 0, .w = 0, .s = 0, .c = 0, \
+                                          .t = 0, .a = 0, .e = 0, .cl = 0 })
+
+static inline struct openflags of_read(struct openflags flags)
+{
+        flags.r = 1; 
+        return(flags);
+}
+
+static inline struct openflags of_write(struct openflags flags)
+{
+        flags.w = 1; 
+        return(flags); 
+}
+
+static inline struct openflags of_rdwr(struct openflags flags)
+{
+        return(of_read(of_write(flags)));
+}
+
+static inline struct openflags of_set_rw(struct openflags flags, int r, int w)
+{
+        flags.r = r;
+        flags.w = w;
+        return(flags);
+}
+
+static inline struct openflags of_sync(struct openflags flags)
+{ 
+        flags.s = 1; 
+        return(flags); 
+}
+
+static inline struct openflags of_create(struct openflags flags)
+{ 
+        flags.c = 1; 
+        return(flags); 
+}
+ 
+static inline struct openflags of_trunc(struct openflags flags)
+{ 
+        flags.t = 1; 
+        return(flags); 
+}
+ 
+static inline struct openflags of_append(struct openflags flags)
+{ 
+        flags.a = 1; 
+        return(flags); 
+}
+ 
+static inline struct openflags of_excl(struct openflags flags)
+{ 
+        flags.e = 1; 
+        return(flags); 
+}
+
+static inline struct openflags of_cloexec(struct openflags flags)
+{ 
+        flags.cl = 1; 
+        return(flags); 
+}
+  
+extern int os_stat_file(const char *file_name, struct uml_stat *buf);
+extern int os_stat_fd(const int fd, struct uml_stat *buf);
+extern int os_access(const char *file, int mode);
+extern void os_print_error(int error, const char* str);
+extern int os_get_exec_close(int fd, int *close_on_exec);
+extern int os_set_exec_close(int fd, int close_on_exec);
+extern int os_ioctl_generic(int fd, unsigned int cmd, unsigned long arg);
+extern int os_window_size(int fd, int *rows, int *cols);
+extern int os_new_tty_pgrp(int fd, int pid);
+extern int os_get_ifname(int fd, char *namebuf);
+extern int os_set_slip(int fd);
+extern int os_set_owner(int fd, int pid);
+extern int os_sigio_async(int master, int slave);
+extern int os_mode_fd(int fd, int mode);
+
+extern int os_seek_file(int fd, __u64 offset);
+extern int os_open_file(char *file, struct openflags flags, int mode);
+extern int os_read_file(int fd, void *buf, int len);
+extern int os_write_file(int fd, const void *buf, int count);
+extern int os_file_size(char *file, long long *size_out);
+extern int os_file_modtime(char *file, unsigned long *modtime);
+extern int os_pipe(int *fd, int stream, int close_on_exec);
+extern int os_set_fd_async(int fd, int owner);
+extern int os_clear_fd_async(int fd);
+extern int os_set_fd_block(int fd, int blocking);
+extern int os_accept_connection(int fd);
+extern int os_create_unix_socket(char *file, int len, int close_on_exec);
+extern int os_shutdown_socket(int fd, int r, int w);
+extern void os_close_file(int fd);
+extern int os_rcv_fd(int fd, int *helper_pid_out);
+extern int create_unix_socket(char *file, int len, int close_on_exec);
+extern int os_connect_socket(char *name);
+extern int os_file_type(char *file);
+extern int os_file_mode(char *file, struct openflags *mode_out);
+extern int os_lock_file(int fd, int excl);
+
+extern unsigned long os_process_pc(int pid);
+extern int os_process_parent(int pid);
+extern void os_stop_process(int pid);
+extern void os_kill_process(int pid, int reap_child);
+extern void os_kill_ptraced_process(int pid, int reap_child);
+extern void os_usr1_process(int pid);
+extern int os_getpid(void);
+
+extern int os_map_memory(void *virt, int fd, unsigned long long off,
+                         unsigned long len, int r, int w, int x);
+extern int os_protect_memory(void *addr, unsigned long len, 
+                             int r, int w, int x);
+extern int os_unmap_memory(void *addr, int len);
+extern void os_flush_stdout(void);
+extern unsigned long long os_usecs(void);
+
+#endif
+
+/*
+ * Overrides for Emacs so that we follow Linus's tabbing style.
+ * Emacs will notice this stuff at the end of the file and automatically
+ * adjust the settings for this buffer only.  This must remain at the end
+ * of the file.
+ * ---------------------------------------------------------------------------
+ * Local variables:
+ * c-file-style: "linux"
+ * End:
+ */
diff --git a/arch/um/include/process.h b/arch/um/include/process.h
new file mode 100644
index 000000000000..5af9157ff54f
--- /dev/null
+++ b/arch/um/include/process.h
@@ -0,0 +1,25 @@
+/* 
+ * Copyright (C) 2000, 2001, 2002 Jeff Dike (jdike@karaya.com)
+ * Licensed under the GPL
+ */
+
+#ifndef __PROCESS_H__
+#define __PROCESS_H__
+
+#include <signal.h>
+
+extern void sig_handler(int sig, struct sigcontext sc);
+extern void alarm_handler(int sig, struct sigcontext sc);
+
+#endif
+
+/*
+ * Overrides for Emacs so that we follow Linus's tabbing style.
+ * Emacs will notice this stuff at the end of the file and automatically
+ * adjust the settings for this buffer only.  This must remain at the end
+ * of the file.
+ * ---------------------------------------------------------------------------
+ * Local variables:
+ * c-file-style: "linux"
+ * End:
+ */
diff --git a/arch/um/include/ptrace_user.h b/arch/um/include/ptrace_user.h
new file mode 100644
index 000000000000..f3450e6bc18d
--- /dev/null
+++ b/arch/um/include/ptrace_user.h
@@ -0,0 +1,60 @@
+/* 
+ * Copyright (C) 2000, 2001, 2002 Jeff Dike (jdike@karaya.com)
+ * Licensed under the GPL
+ */
+
+#ifndef __PTRACE_USER_H__
+#define __PTRACE_USER_H__
+
+#include "sysdep/ptrace_user.h"
+
+extern int ptrace_getregs(long pid, unsigned long *regs_out);
+extern int ptrace_setregs(long pid, unsigned long *regs_in);
+extern int ptrace_getfpregs(long pid, unsigned long *regs_out);
+extern int ptrace_setfpregs(long pid, unsigned long *regs);
+extern void arch_enter_kernel(void *task, int pid);
+extern void arch_leave_kernel(void *task, int pid);
+extern void ptrace_pokeuser(unsigned long addr, unsigned long data);
+
+
+/* syscall emulation path in ptrace */
+
+#ifndef PTRACE_SYSEMU
+#define PTRACE_SYSEMU 31
+#endif
+#ifndef PTRACE_SYSEMU_SINGLESTEP
+#define PTRACE_SYSEMU_SINGLESTEP 32
+#endif
+
+/* On architectures, that started to support PTRACE_O_TRACESYSGOOD
+ * in linux 2.4, there are two different definitions of
+ * PTRACE_SETOPTIONS: linux 2.4 uses 21 while linux 2.6 uses 0x4200.
+ * For binary compatibility, 2.6 also supports the old "21", named
+ * PTRACE_OLDSETOPTION. On these architectures, UML always must use
+ * "21", to ensure the kernel runs on 2.4 and 2.6 host without
+ * recompilation. So, we use PTRACE_OLDSETOPTIONS in UML.
+ * We also want to be able to build the kernel on 2.4, which doesn't
+ * have PTRACE_OLDSETOPTIONS. So, if it is missing, we declare
+ * PTRACE_OLDSETOPTIONS to to be the same as PTRACE_SETOPTIONS.
+ *
+ * On architectures, that start to support PTRACE_O_TRACESYSGOOD on
+ * linux 2.6, PTRACE_OLDSETOPTIONS never is defined, and also isn't
+ * supported by the host kernel. In that case, our trick lets us use
+ * the new 0x4200 with the name PTRACE_OLDSETOPTIONS.
+ */
+#ifndef PTRACE_OLDSETOPTIONS
+#define PTRACE_OLDSETOPTIONS PTRACE_SETOPTIONS
+#endif
+
+void set_using_sysemu(int value);
+int get_using_sysemu(void);
+extern int sysemu_supported;
+
+#define SELECT_PTRACE_OPERATION(sysemu_mode, singlestep_mode) \
+        (((int[3][3] ) { \
+                { PTRACE_SYSCALL, PTRACE_SYSCALL, PTRACE_SINGLESTEP }, \
+                { PTRACE_SYSEMU, PTRACE_SYSEMU, PTRACE_SINGLESTEP }, \
+                { PTRACE_SYSEMU, PTRACE_SYSEMU_SINGLESTEP, PTRACE_SYSEMU_SINGLESTEP }}) \
+                [sysemu_mode][singlestep_mode])
+
+#endif
diff --git a/arch/um/include/registers.h b/arch/um/include/registers.h
new file mode 100644
index 000000000000..8744abb5224f
--- /dev/null
+++ b/arch/um/include/registers.h
@@ -0,0 +1,29 @@
+/*
+ * Copyright (C) 2004 PathScale, Inc
+ * Licensed under the GPL
+ */
+
+#ifndef __REGISTERS_H
+#define __REGISTERS_H
+
+#include "sysdep/ptrace.h"
+
+extern void init_thread_registers(union uml_pt_regs *to);
+extern int save_fp_registers(int pid, unsigned long *fp_regs);
+extern int restore_fp_registers(int pid, unsigned long *fp_regs);
+extern void save_registers(int pid, union uml_pt_regs *regs);
+extern void restore_registers(int pid, union uml_pt_regs *regs);
+extern void init_registers(int pid);
+
+#endif
+
+/*
+ * Overrides for Emacs so that we follow Linus's tabbing style.
+ * Emacs will notice this stuff at the end of the file and automatically
+ * adjust the settings for this buffer only.  This must remain at the end
+ * of the file.
+ * ---------------------------------------------------------------------------
+ * Local variables:
+ * c-file-style: "linux"
+ * End:
+ */
diff --git a/arch/um/include/sigcontext.h b/arch/um/include/sigcontext.h
new file mode 100644
index 000000000000..59816ca7a8df
--- /dev/null
+++ b/arch/um/include/sigcontext.h
@@ -0,0 +1,25 @@
+/* 
+ * Copyright (C) 2001, 2002 Jeff Dike (jdike@karaya.com)
+ * Licensed under the GPL
+ */
+
+#ifndef __UML_SIGCONTEXT_H__
+#define __UML_SIGCONTEXT_H__
+
+#include "sysdep/sigcontext.h"
+
+extern int sc_size(void *data);
+extern void sc_to_sc(void *to_ptr, void *from_ptr);
+
+#endif
+
+/*
+ * Overrides for Emacs so that we follow Linus's tabbing style.
+ * Emacs will notice this stuff at the end of the file and automatically
+ * adjust the settings for this buffer only.  This must remain at the end
+ * of the file.
+ * ---------------------------------------------------------------------------
+ * Local variables:
+ * c-file-style: "linux"
+ * End:
+ */
diff --git a/arch/um/include/sigio.h b/arch/um/include/sigio.h
new file mode 100644
index 000000000000..37d76e29a147
--- /dev/null
+++ b/arch/um/include/sigio.h
@@ -0,0 +1,28 @@
+/* 
+ * Copyright (C) 2002 Jeff Dike (jdike@karaya.com)
+ * Licensed under the GPL
+ */
+
+#ifndef __SIGIO_H__
+#define __SIGIO_H__
+
+extern int write_sigio_irq(int fd);
+extern int register_sigio_fd(int fd);
+extern int read_sigio_fd(int fd);
+extern int add_sigio_fd(int fd, int read);
+extern int ignore_sigio_fd(int fd);
+extern void sigio_lock(void);
+extern void sigio_unlock(void);
+
+#endif
+
+/*
+ * Overrides for Emacs so that we follow Linus's tabbing style.
+ * Emacs will notice this stuff at the end of the file and automatically
+ * adjust the settings for this buffer only.  This must remain at the end
+ * of the file.
+ * ---------------------------------------------------------------------------
+ * Local variables:
+ * c-file-style: "linux"
+ * End:
+ */
diff --git a/arch/um/include/signal_kern.h b/arch/um/include/signal_kern.h
new file mode 100644
index 000000000000..aeb5d5ab1dfd
--- /dev/null
+++ b/arch/um/include/signal_kern.h
@@ -0,0 +1,22 @@
+/* 
+ * Copyright (C) 2001, 2002 Jeff Dike (jdike@karaya.com)
+ * Licensed under the GPL
+ */
+
+#ifndef __SIGNAL_KERN_H__
+#define __SIGNAL_KERN_H__
+
+extern int have_signals(void *t);
+
+#endif
+
+/*
+ * Overrides for Emacs so that we follow Linus's tabbing style.
+ * Emacs will notice this stuff at the end of the file and automatically
+ * adjust the settings for this buffer only.  This must remain at the end
+ * of the file.
+ * ---------------------------------------------------------------------------
+ * Local variables:
+ * c-file-style: "linux"
+ * End:
+ */
diff --git a/arch/um/include/signal_user.h b/arch/um/include/signal_user.h
new file mode 100644
index 000000000000..b075e543d864
--- /dev/null
+++ b/arch/um/include/signal_user.h
@@ -0,0 +1,28 @@
+/* 
+ * Copyright (C) 2001 Jeff Dike (jdike@karaya.com)
+ * Licensed under the GPL
+ */
+
+#ifndef __SIGNAL_USER_H__
+#define __SIGNAL_USER_H__
+
+extern int signal_stack_size;
+
+extern int change_sig(int signal, int on);
+extern void set_sigstack(void *stack, int size);
+extern void set_handler(int sig, void (*handler)(int), int flags, ...);
+extern int set_signals(int enable);
+extern int get_signals(void);
+
+#endif
+
+/*
+ * Overrides for Emacs so that we follow Linus's tabbing style.
+ * Emacs will notice this stuff at the end of the file and automatically
+ * adjust the settings for this buffer only.  This must remain at the end
+ * of the file.
+ * ---------------------------------------------------------------------------
+ * Local variables:
+ * c-file-style: "linux"
+ * End:
+ */
diff --git a/arch/um/include/skas_ptrace.h b/arch/um/include/skas_ptrace.h
new file mode 100644
index 000000000000..cfb5fb4f5b91
--- /dev/null
+++ b/arch/um/include/skas_ptrace.h
@@ -0,0 +1,36 @@
+/* 
+ * Copyright (C) 2000, 2001, 2002 Jeff Dike (jdike@karaya.com)
+ * Licensed under the GPL
+ */
+
+#ifndef __SKAS_PTRACE_H
+#define __SKAS_PTRACE_H
+
+struct ptrace_faultinfo {
+        int is_write;
+        unsigned long addr;
+};
+
+struct ptrace_ldt {
+        int func;
+        void *ptr;
+        unsigned long bytecount;
+};
+
+#define PTRACE_FAULTINFO 52
+#define PTRACE_SIGPENDING 53
+#define PTRACE_LDT 54
+#define PTRACE_SWITCH_MM 55
+
+#endif
+
+/*
+ * Overrides for Emacs so that we follow Linus's tabbing style.
+ * Emacs will notice this stuff at the end of the file and automatically
+ * adjust the settings for this buffer only.  This must remain at the end
+ * of the file.
+ * ---------------------------------------------------------------------------
+ * Local variables:
+ * c-file-style: "linux"
+ * End:
+ */
diff --git a/arch/um/include/syscall_user.h b/arch/um/include/syscall_user.h
new file mode 100644
index 000000000000..811d0ec2445e
--- /dev/null
+++ b/arch/um/include/syscall_user.h
@@ -0,0 +1,23 @@
+/* 
+ * Copyright (C) 2002 Jeff Dike (jdike@karaya.com)
+ * Licensed under the GPL
+ */
+
+#ifndef __SYSCALL_USER_H
+#define __SYSCALL_USER_H
+
+extern int record_syscall_start(int syscall);
+extern void record_syscall_end(int index, long result);
+
+#endif
+
+/*
+ * Overrides for Emacs so that we follow Linus's tabbing style.
+ * Emacs will notice this stuff at the end of the file and automatically
+ * adjust the settings for this buffer only.  This must remain at the end
+ * of the file.
+ * ---------------------------------------------------------------------------
+ * Local variables:
+ * c-file-style: "linux"
+ * End:
+ */
diff --git a/arch/um/include/sysdep-i386/checksum.h b/arch/um/include/sysdep-i386/checksum.h
new file mode 100644
index 000000000000..3a2a45811aa3
--- /dev/null
+++ b/arch/um/include/sysdep-i386/checksum.h
@@ -0,0 +1,219 @@
+/* 
+ * Licensed under the GPL
+ */
+
+#ifndef __UM_SYSDEP_CHECKSUM_H
+#define __UM_SYSDEP_CHECKSUM_H
+
+#include "linux/in6.h"
+#include "linux/string.h"
+
+/*
+ * computes the checksum of a memory block at buff, length len,
+ * and adds in "sum" (32-bit)
+ *
+ * returns a 32-bit number suitable for feeding into itself
+ * or csum_tcpudp_magic
+ *
+ * this function must be called with even lengths, except
+ * for the last fragment, which may be odd
+ *
+ * it's best to have buff aligned on a 32-bit boundary
+ */
+unsigned int csum_partial(const unsigned char * buff, int len, 
+                          unsigned int sum);
+
+/*
+ * the same as csum_partial, but copies from src while it
+ * checksums, and handles user-space pointer exceptions correctly, when needed.
+ *
+ * here even more important to align src and dst on a 32-bit (or even
+ * better 64-bit) boundary
+ */
+
+unsigned int csum_partial_copy_to(const unsigned char *src, unsigned char *dst,
+                                  int len, int sum, int *err_ptr);
+unsigned int csum_partial_copy_from(const unsigned char *src, unsigned char *dst,
+                                    int len, int sum, int *err_ptr);
+
+/*
+ *      Note: when you get a NULL pointer exception here this means someone
+ *      passed in an incorrect kernel address to one of these functions.
+ *
+ *      If you use these functions directly please don't forget the
+ *      access_ok().
+ */
+
+static __inline__
+unsigned int csum_partial_copy_nocheck(const unsigned char *src, unsigned char *dst,
+                                       int len, int sum)
+{
+        memcpy(dst, src, len);
+        return(csum_partial(dst, len, sum));
+}
+
+static __inline__
+unsigned int csum_partial_copy_from_user(const unsigned char *src, unsigned char *dst,
+                                         int len, int sum, int *err_ptr)
+{
+        return csum_partial_copy_from(src, dst, len, sum, err_ptr);
+}
+
+/*
+ * These are the old (and unsafe) way of doing checksums, a warning message 
+ * will be printed if they are used and an exception occurs.
+ *
+ * these functions should go away after some time.
+ */
+
+#define csum_partial_copy_fromuser csum_partial_copy_from_user
+unsigned int csum_partial_copy(const unsigned char *src, unsigned char *dst, int len, int sum);
+
+/*
+ *      This is a version of ip_compute_csum() optimized for IP headers,
+ *      which always checksum on 4 octet boundaries.
+ *
+ *      By Jorge Cwik <jorge@laser.satlink.net>, adapted for linux by
+ *      Arnt Gulbrandsen.
+ */
+static inline unsigned short ip_fast_csum(unsigned char * iph,
+                                          unsigned int ihl)
+{
+        unsigned int sum;
+
+        __asm__ __volatile__(
+            "movl (%1), %0      ;\n"
+            "subl $4, %2        ;\n"
+            "jbe 2f             ;\n"
+            "addl 4(%1), %0     ;\n"
+            "adcl 8(%1), %0     ;\n"
+            "adcl 12(%1), %0    ;\n"
+"1:         adcl 16(%1), %0     ;\n"
+            "lea 4(%1), %1      ;\n"
+            "decl %2            ;\n"
+            "jne 1b             ;\n"
+            "adcl $0, %0        ;\n"
+            "movl %0, %2        ;\n"
+            "shrl $16, %0       ;\n"
+            "addw %w2, %w0      ;\n"
+            "adcl $0, %0        ;\n"
+            "notl %0            ;\n"
+"2:                             ;\n"
+        /* Since the input registers which are loaded with iph and ipl
+           are modified, we must also specify them as outputs, or gcc
+           will assume they contain their original values. */
+        : "=r" (sum), "=r" (iph), "=r" (ihl)
+        : "1" (iph), "2" (ihl)
+        : "memory");
+        return(sum);
+}
+
+/*
+ *      Fold a partial checksum
+ */
+
+static inline unsigned int csum_fold(unsigned int sum)
+{
+        __asm__(
+                "addl %1, %0            ;\n"
+                "adcl $0xffff, %0       ;\n"
+                : "=r" (sum)
+                : "r" (sum << 16), "0" (sum & 0xffff0000)
+        );
+        return (~sum) >> 16;
+}
+
+static inline unsigned long csum_tcpudp_nofold(unsigned long saddr,
+                                                   unsigned long daddr,
+                                                   unsigned short len,
+                                                   unsigned short proto,
+                                                   unsigned int sum)
+{
+    __asm__(
+        "addl %1, %0    ;\n"
+        "adcl %2, %0    ;\n"
+        "adcl %3, %0    ;\n"
+        "adcl $0, %0    ;\n"
+        : "=r" (sum)
+        : "g" (daddr), "g"(saddr), "g"((ntohs(len)<<16)+proto*256), "0"(sum));
+    return sum;
+}
+
+/*
+ * computes the checksum of the TCP/UDP pseudo-header
+ * returns a 16-bit checksum, already complemented
+ */
+static inline unsigned short int csum_tcpudp_magic(unsigned long saddr,
+                                                   unsigned long daddr,
+                                                   unsigned short len,
+                                                   unsigned short proto,
+                                                   unsigned int sum)
+{
+        return csum_fold(csum_tcpudp_nofold(saddr,daddr,len,proto,sum));
+}
+
+/*
+ * this routine is used for miscellaneous IP-like checksums, mainly
+ * in icmp.c
+ */
+
+static inline unsigned short ip_compute_csum(unsigned char * buff, int len)
+{
+    return csum_fold (csum_partial(buff, len, 0));
+}
+
+#define _HAVE_ARCH_IPV6_CSUM
+static __inline__ unsigned short int csum_ipv6_magic(struct in6_addr *saddr,
+                                                     struct in6_addr *daddr,
+                                                     __u32 len,
+                                                     unsigned short proto,
+                                                     unsigned int sum)
+{
+        __asm__(
+                "addl 0(%1), %0         ;\n"
+                "adcl 4(%1), %0         ;\n"
+                "adcl 8(%1), %0         ;\n"
+                "adcl 12(%1), %0        ;\n"
+                "adcl 0(%2), %0         ;\n"
+                "adcl 4(%2), %0         ;\n"
+                "adcl 8(%2), %0         ;\n"
+                "adcl 12(%2), %0        ;\n"
+                "adcl %3, %0            ;\n"
+                "adcl %4, %0            ;\n"
+                "adcl $0, %0            ;\n"
+                : "=&r" (sum)
+                : "r" (saddr), "r" (daddr),
+                  "r"(htonl(len)), "r"(htonl(proto)), "0"(sum));
+
+        return csum_fold(sum);
+}
+
+/*
+ *      Copy and checksum to user
+ */
+#define HAVE_CSUM_COPY_USER
+static __inline__ unsigned int csum_and_copy_to_user(const unsigned char *src,
+                                                     unsigned char *dst,
+                                                     int len, int sum, int *err_ptr)
+{
+        if (access_ok(VERIFY_WRITE, dst, len))
+                return(csum_partial_copy_to(src, dst, len, sum, err_ptr));
+
+        if (len)
+                *err_ptr = -EFAULT;
+
+        return -1; /* invalid checksum */
+}
+
+#endif
+
+/*
+ * Overrides for Emacs so that we follow Linus's tabbing style.
+ * Emacs will notice this stuff at the end of the file and automatically
+ * adjust the settings for this buffer only.  This must remain at the end
+ * of the file.
+ * ---------------------------------------------------------------------------
+ * Local variables:
+ * c-file-style: "linux"
+ * End:
+ */
diff --git a/arch/um/include/sysdep-i386/ptrace.h b/arch/um/include/sysdep-i386/ptrace.h
new file mode 100644
index 000000000000..661d495e2044
--- /dev/null
+++ b/arch/um/include/sysdep-i386/ptrace.h
@@ -0,0 +1,241 @@
+/* 
+ * Copyright (C) 2000, 2001, 2002 Jeff Dike (jdike@karaya.com)
+ * Licensed under the GPL
+ */
+
+#ifndef __SYSDEP_I386_PTRACE_H
+#define __SYSDEP_I386_PTRACE_H
+
+#include "uml-config.h"
+#include "user_constants.h"
+
+#define MAX_REG_NR (UM_FRAME_SIZE / sizeof(unsigned long))
+#define MAX_REG_OFFSET (UM_FRAME_SIZE)
+
+extern void update_debugregs(int seq);
+
+/* syscall emulation path in ptrace */
+
+#ifndef PTRACE_SYSEMU
+#define PTRACE_SYSEMU 31
+#endif
+
+void set_using_sysemu(int value);
+int get_using_sysemu(void);
+extern int sysemu_supported;
+
+#ifdef UML_CONFIG_MODE_TT
+#include "sysdep/sc.h"
+#endif
+
+#ifdef UML_CONFIG_MODE_SKAS
+
+#include "skas_ptregs.h"
+
+#define REGS_IP(r) ((r)[HOST_IP])
+#define REGS_SP(r) ((r)[HOST_SP])
+#define REGS_EFLAGS(r) ((r)[HOST_EFLAGS])
+#define REGS_EAX(r) ((r)[HOST_EAX])
+#define REGS_EBX(r) ((r)[HOST_EBX])
+#define REGS_ECX(r) ((r)[HOST_ECX])
+#define REGS_EDX(r) ((r)[HOST_EDX])
+#define REGS_ESI(r) ((r)[HOST_ESI])
+#define REGS_EDI(r) ((r)[HOST_EDI])
+#define REGS_EBP(r) ((r)[HOST_EBP])
+#define REGS_CS(r) ((r)[HOST_CS])
+#define REGS_SS(r) ((r)[HOST_SS])
+#define REGS_DS(r) ((r)[HOST_DS])
+#define REGS_ES(r) ((r)[HOST_ES])
+#define REGS_FS(r) ((r)[HOST_FS])
+#define REGS_GS(r) ((r)[HOST_GS])
+
+#define REGS_SET_SYSCALL_RETURN(r, res) REGS_EAX(r) = (res)
+
+#define REGS_RESTART_SYSCALL(r) IP_RESTART_SYSCALL(REGS_IP(r))
+
+#define REGS_SEGV_IS_FIXABLE(r) SEGV_IS_FIXABLE((r)->trap_type)
+
+#define REGS_FAULT_ADDR(r) ((r)->fault_addr)
+
+#define REGS_FAULT_WRITE(r) FAULT_WRITE((r)->fault_type)
+
+#endif
+#ifndef PTRACE_SYSEMU_SINGLESTEP
+#define PTRACE_SYSEMU_SINGLESTEP 32
+#endif
+
+#include "choose-mode.h"
+
+union uml_pt_regs {
+#ifdef UML_CONFIG_MODE_TT
+        struct tt_regs {
+                long syscall;
+                void *sc;
+        } tt;
+#endif
+#ifdef UML_CONFIG_MODE_SKAS
+        struct skas_regs {
+                unsigned long regs[HOST_FRAME_SIZE];
+                unsigned long fp[HOST_FP_SIZE];
+                unsigned long xfp[HOST_XFP_SIZE];
+                unsigned long fault_addr;
+                unsigned long fault_type;
+                unsigned long trap_type;
+                long syscall;
+                int is_user;
+        } skas;
+#endif
+};
+
+#define EMPTY_UML_PT_REGS { }
+
+extern int mode_tt;
+
+#define UPT_SC(r) ((r)->tt.sc)
+#define UPT_IP(r) \
+        __CHOOSE_MODE(SC_IP(UPT_SC(r)), REGS_IP((r)->skas.regs))
+#define UPT_SP(r) \
+        __CHOOSE_MODE(SC_SP(UPT_SC(r)), REGS_SP((r)->skas.regs))
+#define UPT_EFLAGS(r) \
+        __CHOOSE_MODE(SC_EFLAGS(UPT_SC(r)), REGS_EFLAGS((r)->skas.regs))
+#define UPT_EAX(r) \
+        __CHOOSE_MODE(SC_EAX(UPT_SC(r)), REGS_EAX((r)->skas.regs))
+#define UPT_EBX(r) \
+        __CHOOSE_MODE(SC_EBX(UPT_SC(r)), REGS_EBX((r)->skas.regs))
+#define UPT_ECX(r) \
+        __CHOOSE_MODE(SC_ECX(UPT_SC(r)), REGS_ECX((r)->skas.regs))
+#define UPT_EDX(r) \
+        __CHOOSE_MODE(SC_EDX(UPT_SC(r)), REGS_EDX((r)->skas.regs))
+#define UPT_ESI(r) \
+        __CHOOSE_MODE(SC_ESI(UPT_SC(r)), REGS_ESI((r)->skas.regs))
+#define UPT_EDI(r) \
+        __CHOOSE_MODE(SC_EDI(UPT_SC(r)), REGS_EDI((r)->skas.regs))
+#define UPT_EBP(r) \
+        __CHOOSE_MODE(SC_EBP(UPT_SC(r)), REGS_EBP((r)->skas.regs))
+#define UPT_ORIG_EAX(r) \
+        __CHOOSE_MODE((r)->tt.syscall, (r)->skas.syscall)
+#define UPT_CS(r) \
+        __CHOOSE_MODE(SC_CS(UPT_SC(r)), REGS_CS((r)->skas.regs))
+#define UPT_SS(r) \
+        __CHOOSE_MODE(SC_SS(UPT_SC(r)), REGS_SS((r)->skas.regs))
+#define UPT_DS(r) \
+        __CHOOSE_MODE(SC_DS(UPT_SC(r)), REGS_DS((r)->skas.regs))
+#define UPT_ES(r) \
+        __CHOOSE_MODE(SC_ES(UPT_SC(r)), REGS_ES((r)->skas.regs))
+#define UPT_FS(r) \
+        __CHOOSE_MODE(SC_FS(UPT_SC(r)), REGS_FS((r)->skas.regs))
+#define UPT_GS(r) \
+        __CHOOSE_MODE(SC_GS(UPT_SC(r)), REGS_GS((r)->skas.regs))
+
+#define UPT_SYSCALL_ARG1(r) UPT_EBX(r)
+#define UPT_SYSCALL_ARG2(r) UPT_ECX(r)
+#define UPT_SYSCALL_ARG3(r) UPT_EDX(r)
+#define UPT_SYSCALL_ARG4(r) UPT_ESI(r)
+#define UPT_SYSCALL_ARG5(r) UPT_EDI(r)
+#define UPT_SYSCALL_ARG6(r) UPT_EBP(r)
+
+extern int user_context(unsigned long sp);
+
+#define UPT_IS_USER(r) \
+        CHOOSE_MODE(user_context(UPT_SP(r)), (r)->skas.is_user)
+
+struct syscall_args {
+        unsigned long args[6];
+};
+
+#define SYSCALL_ARGS(r) ((struct syscall_args) \
+                        { .args = { UPT_SYSCALL_ARG1(r), \
+                                    UPT_SYSCALL_ARG2(r), \
+                                    UPT_SYSCALL_ARG3(r), \
+                                    UPT_SYSCALL_ARG4(r), \
+                                    UPT_SYSCALL_ARG5(r), \
+                                    UPT_SYSCALL_ARG6(r) } } )
+
+#define UPT_REG(regs, reg) \
+        ({      unsigned long val; \
+                switch(reg){ \
+                case EIP: val = UPT_IP(regs); break; \
+                case UESP: val = UPT_SP(regs); break; \
+                case EAX: val = UPT_EAX(regs); break; \
+                case EBX: val = UPT_EBX(regs); break; \
+                case ECX: val = UPT_ECX(regs); break; \
+                case EDX: val = UPT_EDX(regs); break; \
+                case ESI: val = UPT_ESI(regs); break; \
+                case EDI: val = UPT_EDI(regs); break; \
+                case EBP: val = UPT_EBP(regs); break; \
+                case ORIG_EAX: val = UPT_ORIG_EAX(regs); break; \
+                case CS: val = UPT_CS(regs); break; \
+                case SS: val = UPT_SS(regs); break; \
+                case DS: val = UPT_DS(regs); break; \
+                case ES: val = UPT_ES(regs); break; \
+                case FS: val = UPT_FS(regs); break; \
+                case GS: val = UPT_GS(regs); break; \
+                case EFL: val = UPT_EFLAGS(regs); break; \
+                default :  \
+                        panic("Bad register in UPT_REG : %d\n", reg);  \
+                        val = -1; \
+                } \
+                val; \
+        })
+        
+
+#define UPT_SET(regs, reg, val) \
+        do { \
+                switch(reg){ \
+                case EIP: UPT_IP(regs) = val; break; \
+                case UESP: UPT_SP(regs) = val; break; \
+                case EAX: UPT_EAX(regs) = val; break; \
+                case EBX: UPT_EBX(regs) = val; break; \
+                case ECX: UPT_ECX(regs) = val; break; \
+                case EDX: UPT_EDX(regs) = val; break; \
+                case ESI: UPT_ESI(regs) = val; break; \
+                case EDI: UPT_EDI(regs) = val; break; \
+                case EBP: UPT_EBP(regs) = val; break; \
+                case ORIG_EAX: UPT_ORIG_EAX(regs) = val; break; \
+                case CS: UPT_CS(regs) = val; break; \
+                case SS: UPT_SS(regs) = val; break; \
+                case DS: UPT_DS(regs) = val; break; \
+                case ES: UPT_ES(regs) = val; break; \
+                case FS: UPT_FS(regs) = val; break; \
+                case GS: UPT_GS(regs) = val; break; \
+                case EFL: UPT_EFLAGS(regs) = val; break; \
+                default :  \
+                        panic("Bad register in UPT_SET : %d\n", reg);  \
+                        break; \
+                } \
+        } while (0)
+
+#define UPT_SET_SYSCALL_RETURN(r, res) \
+        CHOOSE_MODE(SC_SET_SYSCALL_RETURN(UPT_SC(r), (res)), \
+                    REGS_SET_SYSCALL_RETURN((r)->skas.regs, (res)))
+
+#define UPT_RESTART_SYSCALL(r) \
+        CHOOSE_MODE(SC_RESTART_SYSCALL(UPT_SC(r)), \
+                    REGS_RESTART_SYSCALL((r)->skas.regs))
+
+#define UPT_ORIG_SYSCALL(r) UPT_EAX(r)
+#define UPT_SYSCALL_NR(r) UPT_ORIG_EAX(r)
+#define UPT_SYSCALL_RET(r) UPT_EAX(r)
+
+#define UPT_SEGV_IS_FIXABLE(r) \
+        CHOOSE_MODE(SC_SEGV_IS_FIXABLE(UPT_SC(r)), \
+                    REGS_SEGV_IS_FIXABLE(&r->skas))
+
+#define UPT_FAULT_ADDR(r) \
+        __CHOOSE_MODE(SC_FAULT_ADDR(UPT_SC(r)), REGS_FAULT_ADDR(&r->skas))
+
+#define UPT_FAULT_WRITE(r) \
+        CHOOSE_MODE(SC_FAULT_WRITE(UPT_SC(r)), REGS_FAULT_WRITE(&r->skas))
+
+#endif
+
+/*
+ * Overrides for Emacs so that we follow Linus's tabbing style.
+ * Emacs will notice this stuff at the end of the file and automatically
+ * adjust the settings for this buffer only.  This must remain at the end
+ * of the file.
+ * ---------------------------------------------------------------------------
+ * Local variables:
+ * c-file-style: "linux"
+ * End:
+ */
diff --git a/arch/um/include/sysdep-i386/ptrace_user.h b/arch/um/include/sysdep-i386/ptrace_user.h
new file mode 100644
index 000000000000..eca8066e7a43
--- /dev/null
+++ b/arch/um/include/sysdep-i386/ptrace_user.h
@@ -0,0 +1,62 @@
+/* 
+ * Copyright (C) 2002 Jeff Dike (jdike@karaya.com)
+ * Licensed under the GPL
+ */
+
+#ifndef __SYSDEP_I386_PTRACE_USER_H__
+#define __SYSDEP_I386_PTRACE_USER_H__
+
+#include <sys/ptrace.h>
+#include <linux/ptrace.h>
+#include <asm/ptrace.h>
+
+#define PT_OFFSET(r) ((r) * sizeof(long))
+
+#define PT_SYSCALL_NR(regs) ((regs)[ORIG_EAX])
+#define PT_SYSCALL_NR_OFFSET PT_OFFSET(ORIG_EAX)
+
+#define PT_SYSCALL_ARG1_OFFSET PT_OFFSET(EBX)
+#define PT_SYSCALL_ARG2_OFFSET PT_OFFSET(ECX)
+#define PT_SYSCALL_ARG3_OFFSET PT_OFFSET(EDX)
+#define PT_SYSCALL_ARG4_OFFSET PT_OFFSET(ESI)
+#define PT_SYSCALL_ARG5_OFFSET PT_OFFSET(EDI)
+
+#define PT_SYSCALL_RET_OFFSET PT_OFFSET(EAX)
+
+#define PT_IP_OFFSET PT_OFFSET(EIP)
+#define PT_IP(regs) ((regs)[EIP])
+#define PT_SP(regs) ((regs)[UESP])
+
+#ifndef FRAME_SIZE
+#define FRAME_SIZE (17)
+#endif
+#define FRAME_SIZE_OFFSET (FRAME_SIZE * sizeof(unsigned long))
+
+#define FP_FRAME_SIZE (27)
+#define FPX_FRAME_SIZE (128)
+
+#ifdef PTRACE_GETREGS
+#define UM_HAVE_GETREGS
+#endif
+
+#ifdef PTRACE_SETREGS
+#define UM_HAVE_SETREGS
+#endif
+
+#ifdef PTRACE_GETFPREGS
+#define UM_HAVE_GETFPREGS
+#endif
+
+#ifdef PTRACE_SETFPREGS
+#define UM_HAVE_SETFPREGS
+#endif
+
+#ifdef PTRACE_GETFPXREGS
+#define UM_HAVE_GETFPXREGS
+#endif
+
+#ifdef PTRACE_SETFPXREGS
+#define UM_HAVE_SETFPXREGS
+#endif
+
+#endif
diff --git a/arch/um/include/sysdep-i386/sigcontext.h b/arch/um/include/sysdep-i386/sigcontext.h
new file mode 100644
index 000000000000..dfee589de360
--- /dev/null
+++ b/arch/um/include/sysdep-i386/sigcontext.h
@@ -0,0 +1,49 @@
+/* 
+ * Copyright (C) 2000, 2001, 2002 Jeff Dike (jdike@karaya.com)
+ * Licensed under the GPL
+ */
+
+#ifndef __SYS_SIGCONTEXT_I386_H
+#define __SYS_SIGCONTEXT_I386_H
+
+#include <sysdep/sc.h>
+
+#define IP_RESTART_SYSCALL(ip) ((ip) -= 2)
+
+#define SC_RESTART_SYSCALL(sc) IP_RESTART_SYSCALL(SC_IP(sc))
+#define SC_SET_SYSCALL_RETURN(sc, result) SC_EAX(sc) = (result)
+
+#define SC_FAULT_ADDR(sc) SC_CR2(sc)
+#define SC_FAULT_TYPE(sc) SC_ERR(sc)
+
+#define FAULT_WRITE(err) (err & 2)
+#define TO_SC_ERR(is_write) ((is_write) ? 2 : 0)
+
+#define SC_FAULT_WRITE(sc) (FAULT_WRITE(SC_ERR(sc)))
+
+#define SC_TRAP_TYPE(sc) SC_TRAPNO(sc)
+
+/* ptrace expects that, at the start of a system call, %eax contains
+ * -ENOSYS, so this makes it so.
+ */
+#define SC_START_SYSCALL(sc) do SC_EAX(sc) = -ENOSYS; while(0)
+
+/* This is Page Fault */
+#define SEGV_IS_FIXABLE(trap) (trap == 14)
+
+#define SC_SEGV_IS_FIXABLE(sc) (SEGV_IS_FIXABLE(SC_TRAPNO(sc)))
+
+extern unsigned long *sc_sigmask(void *sc_ptr);
+extern int sc_get_fpregs(unsigned long buf, void *sc_ptr);
+
+#endif
+/*
+ * Overrides for Emacs so that we follow Linus's tabbing style.
+ * Emacs will notice this stuff at the end of the file and automatically
+ * adjust the settings for this buffer only.  This must remain at the end
+ * of the file.
+ * ---------------------------------------------------------------------------
+ * Local variables:
+ * c-file-style: "linux"
+ * End:
+ */
diff --git a/arch/um/include/sysdep-i386/signal.h b/arch/um/include/sysdep-i386/signal.h
new file mode 100644
index 000000000000..b1e1f7a77499
--- /dev/null
+++ b/arch/um/include/sysdep-i386/signal.h
@@ -0,0 +1,25 @@
+/*
+ * Copyright (C) 2004 PathScale, Inc
+ * Licensed under the GPL
+ */
+
+#ifndef __I386_SIGNAL_H_
+#define __I386_SIGNAL_H_
+
+#include <signal.h>
+
+#define ARCH_GET_SIGCONTEXT(sc, sig) \
+        do sc = (struct sigcontext *) (&sig + 1); while(0)
+
+#endif
+
+/*
+ * Overrides for Emacs so that we follow Linus's tabbing style.
+ * Emacs will notice this stuff at the end of the file and automatically
+ * adjust the settings for this buffer only.  This must remain at the end
+ * of the file.
+ * ---------------------------------------------------------------------------
+ * Local variables:
+ * c-file-style: "linux"
+ * End:
+ */
diff --git a/arch/um/include/sysdep-i386/syscalls.h b/arch/um/include/sysdep-i386/syscalls.h
new file mode 100644
index 000000000000..5db81ec9087d
--- /dev/null
+++ b/arch/um/include/sysdep-i386/syscalls.h
@@ -0,0 +1,123 @@
+/* 
+ * Copyright (C) 2000 Jeff Dike (jdike@karaya.com)
+ * Licensed under the GPL
+ */
+
+#include "asm/unistd.h"
+#include "sysdep/ptrace.h"
+
+typedef long syscall_handler_t(struct pt_regs);
+
+/* Not declared on x86, incompatible declarations on x86_64, so these have
+ * to go here rather than in sys_call_table.c
+ */
+extern syscall_handler_t sys_ptrace;
+extern syscall_handler_t sys_rt_sigaction;
+
+extern syscall_handler_t old_mmap_i386;
+
+#define EXECUTE_SYSCALL(syscall, regs) \
+        ((long (*)(struct syscall_args)) (*sys_call_table[syscall]))(SYSCALL_ARGS(&regs->regs))
+
+extern long sys_mmap2(unsigned long addr, unsigned long len,
+                      unsigned long prot, unsigned long flags,
+                      unsigned long fd, unsigned long pgoff);
+
+/* On i386 they choose a meaningless naming.*/
+#define __NR_kexec_load __NR_sys_kexec_load
+
+#define ARCH_SYSCALLS \
+        [ __NR_waitpid ] = (syscall_handler_t *) sys_waitpid, \
+        [ __NR_break ] = (syscall_handler_t *) sys_ni_syscall, \
+        [ __NR_oldstat ] = (syscall_handler_t *) sys_stat, \
+        [ __NR_umount ] = (syscall_handler_t *) sys_oldumount, \
+        [ __NR_stime ] = um_stime, \
+        [ __NR_oldfstat ] = (syscall_handler_t *) sys_fstat, \
+        [ __NR_stty ] = (syscall_handler_t *) sys_ni_syscall, \
+        [ __NR_gtty ] = (syscall_handler_t *) sys_ni_syscall, \
+        [ __NR_nice ] = (syscall_handler_t *) sys_nice, \
+        [ __NR_ftime ] = (syscall_handler_t *) sys_ni_syscall, \
+        [ __NR_prof ] = (syscall_handler_t *) sys_ni_syscall, \
+        [ __NR_signal ] = (syscall_handler_t *) sys_signal, \
+        [ __NR_lock ] = (syscall_handler_t *) sys_ni_syscall, \
+        [ __NR_mpx ] = (syscall_handler_t *) sys_ni_syscall, \
+        [ __NR_ulimit ] = (syscall_handler_t *) sys_ni_syscall, \
+        [ __NR_oldolduname ] = (syscall_handler_t *) sys_olduname, \
+        [ __NR_sigaction ] = (syscall_handler_t *) sys_sigaction, \
+        [ __NR_sgetmask ] = (syscall_handler_t *) sys_sgetmask, \
+        [ __NR_ssetmask ] = (syscall_handler_t *) sys_ssetmask, \
+        [ __NR_sigsuspend ] = (syscall_handler_t *) sys_sigsuspend, \
+        [ __NR_sigpending ] = (syscall_handler_t *) sys_sigpending, \
+        [ __NR_oldlstat ] = (syscall_handler_t *) sys_lstat, \
+        [ __NR_readdir ] = old_readdir, \
+        [ __NR_profil ] = (syscall_handler_t *) sys_ni_syscall, \
+        [ __NR_socketcall ] = (syscall_handler_t *) sys_socketcall, \
+        [ __NR_olduname ] = (syscall_handler_t *) sys_uname, \
+        [ __NR_iopl ] = (syscall_handler_t *) sys_ni_syscall, \
+        [ __NR_idle ] = (syscall_handler_t *) sys_ni_syscall, \
+        [ __NR_ipc ] = (syscall_handler_t *) sys_ipc, \
+        [ __NR_sigreturn ] = (syscall_handler_t *) sys_sigreturn, \
+        [ __NR_sigprocmask ] = (syscall_handler_t *) sys_sigprocmask, \
+        [ __NR_bdflush ] = (syscall_handler_t *) sys_bdflush, \
+        [ __NR__llseek ] = (syscall_handler_t *) sys_llseek, \
+        [ __NR__newselect ] = (syscall_handler_t *) sys_select, \
+        [ __NR_vm86 ] = (syscall_handler_t *) sys_ni_syscall, \
+        [ __NR_mmap ] = (syscall_handler_t *) old_mmap_i386, \
+        [ __NR_ugetrlimit ] = (syscall_handler_t *) sys_getrlimit, \
+        [ __NR_mmap2 ] = (syscall_handler_t *) sys_mmap2, \
+        [ __NR_truncate64 ] = (syscall_handler_t *) sys_truncate64, \
+        [ __NR_ftruncate64 ] = (syscall_handler_t *) sys_ftruncate64, \
+        [ __NR_stat64 ] = (syscall_handler_t *) sys_stat64, \
+        [ __NR_lstat64 ] = (syscall_handler_t *) sys_lstat64, \
+        [ __NR_fstat64 ] = (syscall_handler_t *) sys_fstat64, \
+        [ __NR_fcntl64 ] = (syscall_handler_t *) sys_fcntl64, \
+        [ __NR_sendfile64 ] = (syscall_handler_t *) sys_sendfile64, \
+        [ __NR_statfs64 ] = (syscall_handler_t *) sys_statfs64, \
+        [ __NR_fstatfs64 ] = (syscall_handler_t *) sys_fstatfs64, \
+        [ __NR_fadvise64_64 ] = (syscall_handler_t *) sys_fadvise64_64, \
+        [ __NR_select ] = (syscall_handler_t *) old_select, \
+        [ __NR_vm86old ] = (syscall_handler_t *) sys_ni_syscall, \
+        [ __NR_modify_ldt ] = (syscall_handler_t *) sys_modify_ldt, \
+        [ __NR_lchown32 ] = (syscall_handler_t *) sys_lchown, \
+        [ __NR_getuid32 ] = (syscall_handler_t *) sys_getuid, \
+        [ __NR_getgid32 ] = (syscall_handler_t *) sys_getgid, \
+        [ __NR_geteuid32 ] = (syscall_handler_t *) sys_geteuid, \
+        [ __NR_getegid32 ] = (syscall_handler_t *) sys_getegid, \
+        [ __NR_setreuid32 ] = (syscall_handler_t *) sys_setreuid, \
+        [ __NR_setregid32 ] = (syscall_handler_t *) sys_setregid, \
+        [ __NR_getgroups32 ] = (syscall_handler_t *) sys_getgroups, \
+        [ __NR_setgroups32 ] = (syscall_handler_t *) sys_setgroups, \
+        [ __NR_fchown32 ] = (syscall_handler_t *) sys_fchown, \
+        [ __NR_setresuid32 ] = (syscall_handler_t *) sys_setresuid, \
+        [ __NR_getresuid32 ] = (syscall_handler_t *) sys_getresuid, \
+        [ __NR_setresgid32 ] = (syscall_handler_t *) sys_setresgid, \
+        [ __NR_getresgid32 ] = (syscall_handler_t *) sys_getresgid, \
+        [ __NR_chown32 ] = (syscall_handler_t *) sys_chown, \
+        [ __NR_setuid32 ] = (syscall_handler_t *) sys_setuid, \
+        [ __NR_setgid32 ] = (syscall_handler_t *) sys_setgid, \
+        [ __NR_setfsuid32 ] = (syscall_handler_t *) sys_setfsuid, \
+        [ __NR_setfsgid32 ] = (syscall_handler_t *) sys_setfsgid, \
+        [ __NR_pivot_root ] = (syscall_handler_t *) sys_pivot_root, \
+        [ __NR_mincore ] = (syscall_handler_t *) sys_mincore, \
+        [ __NR_madvise ] = (syscall_handler_t *) sys_madvise, \
+        [ 222 ] = (syscall_handler_t *) sys_ni_syscall, \
+        [ 223 ] = (syscall_handler_t *) sys_ni_syscall, \
+        [ __NR_set_thread_area ] = (syscall_handler_t *) sys_ni_syscall, \
+        [ __NR_get_thread_area ] = (syscall_handler_t *) sys_ni_syscall, \
+        [ 251 ] = (syscall_handler_t *) sys_ni_syscall, \
+        [ 285 ] = (syscall_handler_t *) sys_ni_syscall,
+
+/* 222 doesn't yet have a name in include/asm-i386/unistd.h */
+
+#define LAST_ARCH_SYSCALL 285
+
+/*
+ * Overrides for Emacs so that we follow Linus's tabbing style.
+ * Emacs will notice this stuff at the end of the file and automatically
+ * adjust the settings for this buffer only.  This must remain at the end
+ * of the file.
+ * ---------------------------------------------------------------------------
+ * Local variables:
+ * c-file-style: "linux"
+ * End:
+ */
diff --git a/arch/um/include/sysdep-ia64/ptrace.h b/arch/um/include/sysdep-ia64/ptrace.h
new file mode 100644
index 000000000000..42dd8fb6f2f9
--- /dev/null
+++ b/arch/um/include/sysdep-ia64/ptrace.h
@@ -0,0 +1,26 @@
+/* 
+ * Copyright (C) 2000 Jeff Dike (jdike@karaya.com)
+ * Licensed under the GPL
+ */
+
+#ifndef __SYSDEP_IA64_PTRACE_H
+#define __SYSDEP_IA64_PTRACE_H
+
+struct sys_pt_regs {
+  int foo;
+};
+
+#define EMPTY_REGS { 0 }
+
+#endif
+
+/*
+ * Overrides for Emacs so that we follow Linus's tabbing style.
+ * Emacs will notice this stuff at the end of the file and automatically
+ * adjust the settings for this buffer only.  This must remain at the end
+ * of the file.
+ * ---------------------------------------------------------------------------
+ * Local variables:
+ * c-file-style: "linux"
+ * End:
+ */
diff --git a/arch/um/include/sysdep-ia64/sigcontext.h b/arch/um/include/sysdep-ia64/sigcontext.h
new file mode 100644
index 000000000000..f15fb25260ba
--- /dev/null
+++ b/arch/um/include/sysdep-ia64/sigcontext.h
@@ -0,0 +1,20 @@
+/* 
+ * Copyright (C) 2000 Jeff Dike (jdike@karaya.com)
+ * Licensed under the GPL
+ */
+
+#ifndef __SYSDEP_IA64_SIGCONTEXT_H
+#define __SYSDEP_IA64_SIGCONTEXT_H
+
+#endif
+
+/*
+ * Overrides for Emacs so that we follow Linus's tabbing style.
+ * Emacs will notice this stuff at the end of the file and automatically
+ * adjust the settings for this buffer only.  This must remain at the end
+ * of the file.
+ * ---------------------------------------------------------------------------
+ * Local variables:
+ * c-file-style: "linux"
+ * End:
+ */
diff --git a/arch/um/include/sysdep-ia64/syscalls.h b/arch/um/include/sysdep-ia64/syscalls.h
new file mode 100644
index 000000000000..4a1f46ef1ebc
--- /dev/null
+++ b/arch/um/include/sysdep-ia64/syscalls.h
@@ -0,0 +1,20 @@
+/* 
+ * Copyright (C) 2000 Jeff Dike (jdike@karaya.com)
+ * Licensed under the GPL
+ */
+
+#ifndef __SYSDEP_IA64_SYSCALLS_H
+#define __SYSDEP_IA64_SYSCALLS_H
+
+#endif
+
+/*
+ * Overrides for Emacs so that we follow Linus's tabbing style.
+ * Emacs will notice this stuff at the end of the file and automatically
+ * adjust the settings for this buffer only.  This must remain at the end
+ * of the file.
+ * ---------------------------------------------------------------------------
+ * Local variables:
+ * c-file-style: "linux"
+ * End:
+ */
diff --git a/arch/um/include/sysdep-ppc/ptrace.h b/arch/um/include/sysdep-ppc/ptrace.h
new file mode 100644
index 000000000000..8a27353733a9
--- /dev/null
+++ b/arch/um/include/sysdep-ppc/ptrace.h
@@ -0,0 +1,104 @@
+/* 
+ * Licensed under the GPL
+ */
+
+#ifndef __SYS_PTRACE_PPC_H
+#define __SYS_PTRACE_PPC_H
+
+#include "linux/config.h"
+#include "linux/types.h"
+
+/* the following taken from <asm-ppc/ptrace.h> */
+
+#ifdef CONFIG_PPC64
+#define PPC_REG unsigned long /*long*/
+#else
+#define PPC_REG unsigned long
+#endif
+struct sys_pt_regs_s {
+        PPC_REG gpr[32];
+        PPC_REG nip;
+        PPC_REG msr;
+        PPC_REG orig_gpr3;      /* Used for restarting system calls */
+        PPC_REG ctr;
+        PPC_REG link;
+        PPC_REG xer;
+        PPC_REG ccr;
+        PPC_REG mq;             /* 601 only (not used at present) */
+                                /* Used on APUS to hold IPL value. */
+        PPC_REG trap;           /* Reason for being here */
+        PPC_REG dar;            /* Fault registers */
+        PPC_REG dsisr;
+        PPC_REG result;         /* Result of a system call */
+};
+
+#define NUM_REGS (sizeof(struct sys_pt_regs_s) / sizeof(PPC_REG))
+
+struct sys_pt_regs {
+    PPC_REG regs[sizeof(struct sys_pt_regs_s) / sizeof(PPC_REG)];
+};
+
+#define UM_MAX_REG (PT_FPR0)
+#define UM_MAX_REG_OFFSET (UM_MAX_REG * sizeof(PPC_REG))
+
+#define EMPTY_REGS { { [ 0 ... NUM_REGS - 1] = 0 } }
+
+#define UM_REG(r, n) ((r)->regs[n])
+
+#define UM_SYSCALL_RET(r) UM_REG(r, PT_R3)
+#define UM_SP(r) UM_REG(r, PT_R1)
+#define UM_IP(r) UM_REG(r, PT_NIP)
+#define UM_ELF_ZERO(r) UM_REG(r, PT_FPSCR)
+#define UM_SYSCALL_NR(r) UM_REG(r, PT_R0)
+#define UM_SYSCALL_ARG1(r) UM_REG(r, PT_ORIG_R3)
+#define UM_SYSCALL_ARG2(r) UM_REG(r, PT_R4)
+#define UM_SYSCALL_ARG3(r) UM_REG(r, PT_R5)
+#define UM_SYSCALL_ARG4(r) UM_REG(r, PT_R6)
+#define UM_SYSCALL_ARG5(r) UM_REG(r, PT_R7)
+#define UM_SYSCALL_ARG6(r) UM_REG(r, PT_R8)
+
+#define UM_SYSCALL_NR_OFFSET (PT_R0 * sizeof(PPC_REG))
+#define UM_SYSCALL_RET_OFFSET (PT_R3 * sizeof(PPC_REG))
+#define UM_SYSCALL_ARG1_OFFSET (PT_R3 * sizeof(PPC_REG))
+#define UM_SYSCALL_ARG2_OFFSET (PT_R4 * sizeof(PPC_REG))
+#define UM_SYSCALL_ARG3_OFFSET (PT_R5 * sizeof(PPC_REG))
+#define UM_SYSCALL_ARG4_OFFSET (PT_R6 * sizeof(PPC_REG))
+#define UM_SYSCALL_ARG5_OFFSET (PT_R7 * sizeof(PPC_REG))
+#define UM_SYSCALL_ARG6_OFFSET (PT_R8 * sizeof(PPC_REG))
+#define UM_SP_OFFSET (PT_R1 * sizeof(PPC_REG))
+#define UM_IP_OFFSET (PT_NIP * sizeof(PPC_REG))
+#define UM_ELF_ZERO_OFFSET (PT_R3 * sizeof(PPC_REG))
+
+#define UM_SET_SYSCALL_RETURN(_regs, result)            \
+do {                                                    \
+        if (result < 0) {                               \
+                (_regs)->regs[PT_CCR] |= 0x10000000;    \
+                UM_SYSCALL_RET((_regs)) = -result;      \
+        } else {                                        \
+                UM_SYSCALL_RET((_regs)) = result;       \
+        }                                               \
+} while(0)
+
+extern void shove_aux_table(unsigned long sp);
+#define UM_FIX_EXEC_STACK(sp) shove_aux_table(sp);
+
+/* These aren't actually defined.  The undefs are just to make sure
+ * everyone's clear on the concept.
+ */
+#undef UML_HAVE_GETREGS
+#undef UML_HAVE_GETFPREGS
+#undef UML_HAVE_SETREGS
+#undef UML_HAVE_SETFPREGS
+
+#endif
+
+/*
+ * Overrides for Emacs so that we follow Linus's tabbing style.
+ * Emacs will notice this stuff at the end of the file and automatically
+ * adjust the settings for this buffer only.  This must remain at the end
+ * of the file.
+ * ---------------------------------------------------------------------------
+ * Local variables:
+ * c-file-style: "linux"
+ * End:
+ */
diff --git a/arch/um/include/sysdep-ppc/sigcontext.h b/arch/um/include/sysdep-ppc/sigcontext.h
new file mode 100644
index 000000000000..f20d965de9c7
--- /dev/null
+++ b/arch/um/include/sysdep-ppc/sigcontext.h
@@ -0,0 +1,62 @@
+/* 
+ * Copyright (C) 2000 Jeff Dike (jdike@karaya.com)
+ * Licensed under the GPL
+ */
+
+#ifndef __SYS_SIGCONTEXT_PPC_H
+#define __SYS_SIGCONTEXT_PPC_H
+
+#define DSISR_WRITE 0x02000000
+
+#define SC_FAULT_ADDR(sc) ({ \
+                struct sigcontext *_sc = (sc); \
+                long retval = -1; \
+                switch (_sc->regs->trap) { \
+                case 0x300: \
+                        /* data exception */ \
+                        retval = _sc->regs->dar; \
+                        break; \
+                case 0x400: \
+                        /* instruction exception */ \
+                        retval = _sc->regs->nip; \
+                        break; \
+                default: \
+                        panic("SC_FAULT_ADDR: unhandled trap type\n"); \
+                } \
+                retval; \
+        })
+
+#define SC_FAULT_WRITE(sc) ({ \
+                struct sigcontext *_sc = (sc); \
+                long retval = -1; \
+                switch (_sc->regs->trap) { \
+                case 0x300: \
+                        /* data exception */ \
+                        retval = !!(_sc->regs->dsisr & DSISR_WRITE); \
+                        break; \
+                case 0x400: \
+                        /* instruction exception: not a write */ \
+                        retval = 0; \
+                        break; \
+                default: \
+                        panic("SC_FAULT_ADDR: unhandled trap type\n"); \
+                } \
+                retval; \
+        })
+
+#define SC_IP(sc) ((sc)->regs->nip)
+#define SC_SP(sc) ((sc)->regs->gpr[1])
+#define SEGV_IS_FIXABLE(sc) (1)
+
+#endif
+
+/*
+ * Overrides for Emacs so that we follow Linus's tabbing style.
+ * Emacs will notice this stuff at the end of the file and automatically
+ * adjust the settings for this buffer only.  This must remain at the end
+ * of the file.
+ * ---------------------------------------------------------------------------
+ * Local variables:
+ * c-file-style: "linux"
+ * End:
+ */
diff --git a/arch/um/include/sysdep-ppc/syscalls.h b/arch/um/include/sysdep-ppc/syscalls.h
new file mode 100644
index 000000000000..679df351e19b
--- /dev/null
+++ b/arch/um/include/sysdep-ppc/syscalls.h
@@ -0,0 +1,53 @@
+/* 
+ * Copyright (C) 2000 Jeff Dike (jdike@karaya.com)
+ * Licensed under the GPL
+ */
+
+typedef long syscall_handler_t(unsigned long arg1, unsigned long arg2,
+                               unsigned long arg3, unsigned long arg4,
+                               unsigned long arg5, unsigned long arg6);
+
+#define EXECUTE_SYSCALL(syscall, regs) \
+        (*sys_call_table[syscall])(UM_SYSCALL_ARG1(&regs), \
+                                   UM_SYSCALL_ARG2(&regs), \
+                                   UM_SYSCALL_ARG3(&regs), \
+                                   UM_SYSCALL_ARG4(&regs), \
+                                   UM_SYSCALL_ARG5(&regs), \
+                                   UM_SYSCALL_ARG6(&regs))
+
+extern syscall_handler_t sys_mincore;
+extern syscall_handler_t sys_madvise;
+
+/* old_mmap needs the correct prototype since syscall_kern.c includes
+ * this file.
+ */
+int old_mmap(unsigned long addr, unsigned long len,
+             unsigned long prot, unsigned long flags,
+             unsigned long fd, unsigned long offset);
+
+#define ARCH_SYSCALLS \
+        [ __NR_modify_ldt ] = sys_ni_syscall, \
+        [ __NR_pciconfig_read ] = sys_ni_syscall, \
+        [ __NR_pciconfig_write ] = sys_ni_syscall, \
+        [ __NR_pciconfig_iobase ] = sys_ni_syscall, \
+        [ __NR_pivot_root ] = sys_ni_syscall, \
+        [ __NR_multiplexer ] = sys_ni_syscall, \
+        [ __NR_mmap ] = old_mmap, \
+        [ __NR_madvise ] = sys_madvise, \
+        [ __NR_mincore ] = sys_mincore, \
+        [ __NR_iopl ] = (syscall_handler_t *) sys_ni_syscall, \
+        [ __NR_utimes ] = (syscall_handler_t *) sys_utimes, \
+        [ __NR_fadvise64 ] = (syscall_handler_t *) sys_fadvise64,
+
+#define LAST_ARCH_SYSCALL __NR_fadvise64
+
+/*
+ * Overrides for Emacs so that we follow Linus's tabbing style.
+ * Emacs will notice this stuff at the end of the file and automatically
+ * adjust the settings for this buffer only.  This must remain at the end
+ * of the file.
+ * ---------------------------------------------------------------------------
+ * Local variables:
+ * c-file-style: "linux"
+ * End:
+ */
diff --git a/arch/um/include/sysdep-x86_64/checksum.h b/arch/um/include/sysdep-x86_64/checksum.h
new file mode 100644
index 000000000000..572c6c19be33
--- /dev/null
+++ b/arch/um/include/sysdep-x86_64/checksum.h
@@ -0,0 +1,151 @@
+/*
+ * Licensed under the GPL
+ */
+
+#ifndef __UM_SYSDEP_CHECKSUM_H
+#define __UM_SYSDEP_CHECKSUM_H
+
+#include "linux/string.h"
+#include "linux/in6.h"
+#include "asm/uaccess.h"
+
+extern unsigned int csum_partial_copy_from(const unsigned char *src, unsigned char *dst, int len,
+                                           int sum, int *err_ptr);
+extern unsigned csum_partial(const unsigned char *buff, unsigned len,
+                             unsigned sum);
+
+/*
+ *      Note: when you get a NULL pointer exception here this means someone
+ *      passed in an incorrect kernel address to one of these functions.
+ *
+ *      If you use these functions directly please don't forget the
+ *      access_ok().
+ */
+
+static __inline__
+unsigned int csum_partial_copy_nocheck(const unsigned char *src, unsigned char *dst,
+                                       int len, int sum)
+{
+        memcpy(dst, src, len);
+        return(csum_partial(dst, len, sum));
+}
+
+static __inline__
+unsigned int csum_partial_copy_from_user(const unsigned char *src, unsigned char *dst,
+                                         int len, int sum, int *err_ptr)
+{
+        return csum_partial_copy_from(src, dst, len, sum, err_ptr);
+}
+
+/**
+ * csum_fold - Fold and invert a 32bit checksum.
+ * sum: 32bit unfolded sum
+ *
+ * Fold a 32bit running checksum to 16bit and invert it. This is usually
+ * the last step before putting a checksum into a packet.
+ * Make sure not to mix with 64bit checksums.
+ */
+static inline unsigned int csum_fold(unsigned int sum)
+{
+        __asm__(
+                "  addl %1,%0\n"
+                "  adcl $0xffff,%0"
+                : "=r" (sum)
+                : "r" (sum << 16), "0" (sum & 0xffff0000)
+        );
+        return (~sum) >> 16;
+}
+
+/**
+ * csum_tcpup_nofold - Compute an IPv4 pseudo header checksum.
+ * @saddr: source address
+ * @daddr: destination address
+ * @len: length of packet
+ * @proto: ip protocol of packet
+ * @sum: initial sum to be added in (32bit unfolded)
+ *
+ * Returns the pseudo header checksum the input data. Result is
+ * 32bit unfolded.
+ */
+static inline unsigned long
+csum_tcpudp_nofold(unsigned saddr, unsigned daddr, unsigned short len,
+                   unsigned short proto, unsigned int sum)
+{
+        asm("  addl %1, %0\n"
+            "  adcl %2, %0\n"
+            "  adcl %3, %0\n"
+            "  adcl $0, %0\n"
+                : "=r" (sum)
+            : "g" (daddr), "g" (saddr), "g" ((ntohs(len)<<16)+proto*256), "0" (sum));
+    return sum;
+}
+
+/*
+ * computes the checksum of the TCP/UDP pseudo-header
+ * returns a 16-bit checksum, already complemented
+ */
+static inline unsigned short int csum_tcpudp_magic(unsigned long saddr,
+                                                   unsigned long daddr,
+                                                   unsigned short len,
+                                                   unsigned short proto,
+                                                   unsigned int sum)
+{
+        return csum_fold(csum_tcpudp_nofold(saddr,daddr,len,proto,sum));
+}
+
+/**
+ * ip_fast_csum - Compute the IPv4 header checksum efficiently.
+ * iph: ipv4 header
+ * ihl: length of header / 4
+ */
+static inline unsigned short ip_fast_csum(unsigned char *iph, unsigned int ihl)
+{
+        unsigned int sum;
+
+        asm(    "  movl (%1), %0\n"
+                "  subl $4, %2\n"
+                "  jbe 2f\n"
+                "  addl 4(%1), %0\n"
+                "  adcl 8(%1), %0\n"
+                "  adcl 12(%1), %0\n"
+                "1: adcl 16(%1), %0\n"
+                "  lea 4(%1), %1\n"
+                "  decl %2\n"
+                "  jne  1b\n"
+                "  adcl $0, %0\n"
+                "  movl %0, %2\n"
+                "  shrl $16, %0\n"
+                "  addw %w2, %w0\n"
+                "  adcl $0, %0\n"
+                "  notl %0\n"
+                "2:"
+        /* Since the input registers which are loaded with iph and ipl
+           are modified, we must also specify them as outputs, or gcc
+           will assume they contain their original values. */
+        : "=r" (sum), "=r" (iph), "=r" (ihl)
+        : "1" (iph), "2" (ihl)
+        : "memory");
+        return(sum);
+}
+
+static inline unsigned add32_with_carry(unsigned a, unsigned b)
+{
+        asm("addl %2,%0\n\t"
+            "adcl $0,%0"
+            : "=r" (a)
+            : "0" (a), "r" (b));
+        return a;
+}
+
+#endif
+
+/*
+ * Overrides for Emacs so that we follow Linus's tabbing style.
+ * Emacs will notice this stuff at the end of the file and automatically
+ * adjust the settings for this buffer only.  This must remain at the end
+ * of the file.
+ * ---------------------------------------------------------------------------
+ * Local variables:
+ * c-file-style: "linux"
+ * End:
+ */
diff --git a/arch/um/include/sysdep-x86_64/ptrace.h b/arch/um/include/sysdep-x86_64/ptrace.h
new file mode 100644
index 000000000000..915c82daffbd
--- /dev/null
+++ b/arch/um/include/sysdep-x86_64/ptrace.h
@@ -0,0 +1,264 @@
+/*
+ * Copyright 2003 PathScale, Inc.
+ *
+ * Licensed under the GPL
+ */
+
+#ifndef __SYSDEP_X86_64_PTRACE_H
+#define __SYSDEP_X86_64_PTRACE_H
+
+#include "uml-config.h"
+#include "user_constants.h"
+
+#define MAX_REG_OFFSET (UM_FRAME_SIZE)
+#define MAX_REG_NR ((MAX_REG_OFFSET) / sizeof(unsigned long))
+
+#ifdef UML_CONFIG_MODE_TT
+#include "sysdep/sc.h"
+#endif
+
+#ifdef UML_CONFIG_MODE_SKAS
+#include "skas_ptregs.h"
+
+#define REGS_IP(r) ((r)[HOST_IP])
+#define REGS_SP(r) ((r)[HOST_SP])
+
+#define REGS_RBX(r) ((r)[HOST_RBX])
+#define REGS_RCX(r) ((r)[HOST_RCX])
+#define REGS_RDX(r) ((r)[HOST_RDX])
+#define REGS_RSI(r) ((r)[HOST_RSI])
+#define REGS_RDI(r) ((r)[HOST_RDI])
+#define REGS_RBP(r) ((r)[HOST_RBP])
+#define REGS_RAX(r) ((r)[HOST_RAX])
+#define REGS_R8(r) ((r)[HOST_R8])
+#define REGS_R9(r) ((r)[HOST_R9])
+#define REGS_R10(r) ((r)[HOST_R10])
+#define REGS_R11(r) ((r)[HOST_R11])
+#define REGS_R12(r) ((r)[HOST_R12])
+#define REGS_R13(r) ((r)[HOST_R13])
+#define REGS_R14(r) ((r)[HOST_R14])
+#define REGS_R15(r) ((r)[HOST_R15])
+#define REGS_CS(r) ((r)[HOST_CS])
+#define REGS_EFLAGS(r) ((r)[HOST_EFLAGS])
+#define REGS_SS(r) ((r)[HOST_SS])
+
+#define HOST_FS_BASE 21
+#define HOST_GS_BASE 22
+#define HOST_DS 23
+#define HOST_ES 24
+#define HOST_FS 25
+#define HOST_GS 26
+
+#define REGS_FS_BASE(r) ((r)[HOST_FS_BASE])
+#define REGS_GS_BASE(r) ((r)[HOST_GS_BASE])
+#define REGS_DS(r) ((r)[HOST_DS])
+#define REGS_ES(r) ((r)[HOST_ES])
+#define REGS_FS(r) ((r)[HOST_FS])
+#define REGS_GS(r) ((r)[HOST_GS])
+
+#define REGS_ORIG_RAX(r) ((r)[HOST_ORIG_RAX])
+
+#define REGS_SET_SYSCALL_RETURN(r, res) REGS_RAX(r) = (res)
+
+#define REGS_RESTART_SYSCALL(r) IP_RESTART_SYSCALL(REGS_IP(r))
+
+#define REGS_SEGV_IS_FIXABLE(r) SEGV_IS_FIXABLE((r)->trap_type)
+
+#define REGS_FAULT_ADDR(r) ((r)->fault_addr)
+
+#define REGS_FAULT_WRITE(r) FAULT_WRITE((r)->fault_type)
+
+#define REGS_TRAP(r) ((r)->trap_type)
+
+#define REGS_ERR(r) ((r)->fault_type)
+
+#endif
+
+#include "choose-mode.h"
+
+/* XXX */
+union uml_pt_regs {
+#ifdef UML_CONFIG_MODE_TT
+        struct tt_regs {
+                long syscall;
+                unsigned long orig_rax;
+                void *sc;
+        } tt;
+#endif
+#ifdef UML_CONFIG_MODE_SKAS
+        struct skas_regs {
+                /* XXX */
+                unsigned long regs[27];
+                unsigned long fp[65];
+                unsigned long fault_addr;
+                unsigned long fault_type;
+                unsigned long trap_type;
+                long syscall;
+                int is_user;
+        } skas;
+#endif
+};
+
+#define EMPTY_UML_PT_REGS { }
+
+/* XXX */
+extern int mode_tt;
+
+#define UPT_RBX(r) __CHOOSE_MODE(SC_RBX(UPT_SC(r)), REGS_RBX((r)->skas.regs))
+#define UPT_RCX(r) __CHOOSE_MODE(SC_RCX(UPT_SC(r)), REGS_RCX((r)->skas.regs))
+#define UPT_RDX(r) __CHOOSE_MODE(SC_RDX(UPT_SC(r)), REGS_RDX((r)->skas.regs))
+#define UPT_RSI(r) __CHOOSE_MODE(SC_RSI(UPT_SC(r)), REGS_RSI((r)->skas.regs))
+#define UPT_RDI(r) __CHOOSE_MODE(SC_RDI(UPT_SC(r)), REGS_RDI((r)->skas.regs))
+#define UPT_RBP(r) __CHOOSE_MODE(SC_RBP(UPT_SC(r)), REGS_RBP((r)->skas.regs))
+#define UPT_RAX(r) __CHOOSE_MODE(SC_RAX(UPT_SC(r)), REGS_RAX((r)->skas.regs))
+#define UPT_R8(r) __CHOOSE_MODE(SC_R8(UPT_SC(r)), REGS_R8((r)->skas.regs))
+#define UPT_R9(r) __CHOOSE_MODE(SC_R9(UPT_SC(r)), REGS_R9((r)->skas.regs))
+#define UPT_R10(r) __CHOOSE_MODE(SC_R10(UPT_SC(r)), REGS_R10((r)->skas.regs))
+#define UPT_R11(r) __CHOOSE_MODE(SC_R11(UPT_SC(r)), REGS_R11((r)->skas.regs))
+#define UPT_R12(r) __CHOOSE_MODE(SC_R12(UPT_SC(r)), REGS_R12((r)->skas.regs))
+#define UPT_R13(r) __CHOOSE_MODE(SC_R13(UPT_SC(r)), REGS_R13((r)->skas.regs))
+#define UPT_R14(r) __CHOOSE_MODE(SC_R14(UPT_SC(r)), REGS_R14((r)->skas.regs))
+#define UPT_R15(r) __CHOOSE_MODE(SC_R15(UPT_SC(r)), REGS_R15((r)->skas.regs))
+#define UPT_CS(r) __CHOOSE_MODE(SC_CS(UPT_SC(r)), REGS_CS((r)->skas.regs))
+#define UPT_FS(r) __CHOOSE_MODE(SC_FS(UPT_SC(r)), REGS_FS((r)->skas.regs))
+#define UPT_GS(r) __CHOOSE_MODE(SC_GS(UPT_SC(r)), REGS_GS((r)->skas.regs))
+#define UPT_DS(r) __CHOOSE_MODE(SC_DS(UPT_SC(r)), REGS_DS((r)->skas.regs))
+#define UPT_ES(r) __CHOOSE_MODE(SC_ES(UPT_SC(r)), REGS_ES((r)->skas.regs))
+#define UPT_CS(r) __CHOOSE_MODE(SC_CS(UPT_SC(r)), REGS_CS((r)->skas.regs))
+#define UPT_ORIG_RAX(r) \
+        __CHOOSE_MODE((r)->tt.orig_rax, REGS_ORIG_RAX((r)->skas.regs))
+
+#define UPT_IP(r) __CHOOSE_MODE(SC_IP(UPT_SC(r)), REGS_IP((r)->skas.regs))
+#define UPT_SP(r) __CHOOSE_MODE(SC_SP(UPT_SC(r)), REGS_SP((r)->skas.regs))
+
+#define UPT_EFLAGS(r) \
+        __CHOOSE_MODE(SC_EFLAGS(UPT_SC(r)), REGS_EFLAGS((r)->skas.regs))
+#define UPT_SC(r) ((r)->tt.sc)
+#define UPT_SYSCALL_NR(r) __CHOOSE_MODE((r)->tt.syscall, (r)->skas.syscall)
+
+extern int user_context(unsigned long sp);
+
+#define UPT_IS_USER(r) \
+        CHOOSE_MODE(user_context(UPT_SP(r)), (r)->skas.is_user)
+
+#define UPT_SYSCALL_ARG1(r) UPT_RDI(r)
+#define UPT_SYSCALL_ARG2(r) UPT_RSI(r)
+#define UPT_SYSCALL_ARG3(r) UPT_RDX(r)
+#define UPT_SYSCALL_ARG4(r) UPT_R10(r)
+#define UPT_SYSCALL_ARG5(r) UPT_R8(r)
+#define UPT_SYSCALL_ARG6(r) UPT_R9(r)
+
+struct syscall_args {
+        unsigned long args[6];
+};
+
+#define SYSCALL_ARGS(r) ((struct syscall_args) \
+                        { .args = { UPT_SYSCALL_ARG1(r), \
+                                    UPT_SYSCALL_ARG2(r), \
+                                    UPT_SYSCALL_ARG3(r), \
+                                    UPT_SYSCALL_ARG4(r), \
+                                    UPT_SYSCALL_ARG5(r), \
+                                    UPT_SYSCALL_ARG6(r) } } )
+
+#define UPT_REG(regs, reg) \
+        ({      unsigned long val; \
+                switch(reg){ \
+                case R8: val = UPT_R8(regs); break; \
+                case R9: val = UPT_R9(regs); break; \
+                case R10: val = UPT_R10(regs); break; \
+                case R11: val = UPT_R11(regs); break; \
+                case R12: val = UPT_R12(regs); break; \
+                case R13: val = UPT_R13(regs); break; \
+                case R14: val = UPT_R14(regs); break; \
+                case R15: val = UPT_R15(regs); break; \
+                case RIP: val = UPT_IP(regs); break; \
+                case RSP: val = UPT_SP(regs); break; \
+                case RAX: val = UPT_RAX(regs); break; \
+                case RBX: val = UPT_RBX(regs); break; \
+                case RCX: val = UPT_RCX(regs); break; \
+                case RDX: val = UPT_RDX(regs); break; \
+                case RSI: val = UPT_RSI(regs); break; \
+                case RDI: val = UPT_RDI(regs); break; \
+                case RBP: val = UPT_RBP(regs); break; \
+                case ORIG_RAX: val = UPT_ORIG_RAX(regs); break; \
+                case CS: val = UPT_CS(regs); break; \
+                case DS: val = UPT_DS(regs); break; \
+                case ES: val = UPT_ES(regs); break; \
+                case FS: val = UPT_FS(regs); break; \
+                case GS: val = UPT_GS(regs); break; \
+                case EFLAGS: val = UPT_EFLAGS(regs); break; \
+                default :  \
+                        panic("Bad register in UPT_REG : %d\n", reg);  \
+                        val = -1; \
+                } \
+                val; \
+        })
+
+
+#define UPT_SET(regs, reg, val) \
+        ({      unsigned long val; \
+                switch(reg){ \
+                case R8: UPT_R8(regs) = val; break; \
+                case R9: UPT_R9(regs) = val; break; \
+                case R10: UPT_R10(regs) = val; break; \
+                case R11: UPT_R11(regs) = val; break; \
+                case R12: UPT_R12(regs) = val; break; \
+                case R13: UPT_R13(regs) = val; break; \
+                case R14: UPT_R14(regs) = val; break; \
+                case R15: UPT_R15(regs) = val; break; \
+                case RIP: UPT_IP(regs) = val; break; \
+                case RSP: UPT_SP(regs) = val; break; \
+                case RAX: UPT_RAX(regs) = val; break; \
+                case RBX: UPT_RBX(regs) = val; break; \
+                case RCX: UPT_RCX(regs) = val; break; \
+                case RDX: UPT_RDX(regs) = val; break; \
+                case RSI: UPT_RSI(regs) = val; break; \
+                case RDI: UPT_RDI(regs) = val; break; \
+                case RBP: UPT_RBP(regs) = val; break; \
+                case ORIG_RAX: UPT_ORIG_RAX(regs) = val; break; \
+                case CS: UPT_CS(regs) = val; break; \
+                case DS: UPT_DS(regs) = val; break; \
+                case ES: UPT_ES(regs) = val; break; \
+                case FS: UPT_FS(regs) = val; break; \
+                case GS: UPT_GS(regs) = val; break; \
+                case EFLAGS: UPT_EFLAGS(regs) = val; break; \
+                default :  \
+                        panic("Bad register in UPT_SET : %d\n", reg);  \
+                        break; \
+                } \
+                val; \
+        })
+
+#define UPT_SET_SYSCALL_RETURN(r, res) \
+        CHOOSE_MODE(SC_SET_SYSCALL_RETURN(UPT_SC(r), (res)), \
+                    REGS_SET_SYSCALL_RETURN((r)->skas.regs, (res)))
+
+#define UPT_RESTART_SYSCALL(r) \
+        CHOOSE_MODE(SC_RESTART_SYSCALL(UPT_SC(r)), \
+                    REGS_RESTART_SYSCALL((r)->skas.regs))
+
+#define UPT_SEGV_IS_FIXABLE(r) \
+        CHOOSE_MODE(SC_SEGV_IS_FIXABLE(UPT_SC(r)), \
+                    REGS_SEGV_IS_FIXABLE(&r->skas))
+
+#define UPT_FAULT_ADDR(r) \
+        __CHOOSE_MODE(SC_FAULT_ADDR(UPT_SC(r)), REGS_FAULT_ADDR(&r->skas))
+
+#define UPT_FAULT_WRITE(r) \
+        CHOOSE_MODE(SC_FAULT_WRITE(UPT_SC(r)), REGS_FAULT_WRITE(&r->skas))
+
+#define UPT_TRAP(r) __CHOOSE_MODE(SC_TRAP_TYPE(UPT_SC(r)), REGS_TRAP(&r->skas))
+#define UPT_ERR(r) __CHOOSE_MODE(SC_FAULT_TYPE(UPT_SC(r)), REGS_ERR(&r->skas))
+
+#endif
+
+/*
+ * Overrides for Emacs so that we follow Linus's tabbing style.
+ * Emacs will notice this stuff at the end of the file and automatically
+ * adjust the settings for this buffer only.  This must remain at the end
+ * of the file.
+ * ---------------------------------------------------------------------------
+ * Local variables:
+ * c-file-style: "linux"
+ * End:
+ */
diff --git a/arch/um/include/sysdep-x86_64/ptrace_user.h b/arch/um/include/sysdep-x86_64/ptrace_user.h
new file mode 100644
index 000000000000..31729973fb14
--- /dev/null
+++ b/arch/um/include/sysdep-x86_64/ptrace_user.h
@@ -0,0 +1,69 @@
+/*
+ * Copyright 2003 PathScale, Inc.
+ *
+ * Licensed under the GPL
+ */
+
+#ifndef __SYSDEP_X86_64_PTRACE_USER_H__
+#define __SYSDEP_X86_64_PTRACE_USER_H__
+
+#define __FRAME_OFFSETS
+#include <sys/ptrace.h>
+#include <linux/ptrace.h>
+#include <asm/ptrace.h>
+#undef __FRAME_OFFSETS
+
+#define PT_INDEX(off) ((off) / sizeof(unsigned long))
+
+#define PT_SYSCALL_NR(regs) ((regs)[PT_INDEX(ORIG_RAX)])
+#define PT_SYSCALL_NR_OFFSET (ORIG_RAX)
+
+#define PT_SYSCALL_ARG1(regs) (((unsigned long *) (regs))[PT_INDEX(RDI)])
+#define PT_SYSCALL_ARG1_OFFSET (RDI)
+
+#define PT_SYSCALL_ARG2(regs) (((unsigned long *) (regs))[PT_INDEX(RSI)])
+#define PT_SYSCALL_ARG2_OFFSET (RSI)
+
+#define PT_SYSCALL_ARG3(regs) (((unsigned long *) (regs))[PT_INDEX(RDX)])
+#define PT_SYSCALL_ARG3_OFFSET (RDX)
+
+#define PT_SYSCALL_ARG4(regs) (((unsigned long *) (regs))[PT_INDEX(RCX)])
+#define PT_SYSCALL_ARG4_OFFSET (RCX)
+
+#define PT_SYSCALL_ARG5(regs) (((unsigned long *) (regs))[PT_INDEX(R8)])
+#define PT_SYSCALL_ARG5_OFFSET (R8)
+
+#define PT_SYSCALL_ARG6(regs) (((unsigned long *) (regs))[PT_INDEX(R9)])
+#define PT_SYSCALL_ARG6_OFFSET (R9)
+
+#define PT_SYSCALL_RET_OFFSET (RAX)
+
+#define PT_IP_OFFSET (RIP)
+#define PT_IP(regs) ((regs)[PT_INDEX(RIP)])
+
+#define PT_SP_OFFSET (RSP)
+#define PT_SP(regs) ((regs)[PT_INDEX(RSP)])
+
+#define PT_ORIG_RAX_OFFSET (ORIG_RAX)
+#define PT_ORIG_RAX(regs) ((regs)[PT_INDEX(ORIG_RAX)])
+
+/* x86_64 FC3 doesn't define this in /usr/include/linux/ptrace.h even though
+ * it's defined in the kernel's include/linux/ptrace.h. Additionally, use the
+ * 2.4 name and value for 2.4 host compatibility.
+ */
+#ifndef PTRACE_OLDSETOPTIONS
+#define PTRACE_OLDSETOPTIONS 21
+#endif
+
+#endif
+
+/*
+ * Overrides for Emacs so that we follow Linus's tabbing style.
+ * Emacs will notice this stuff at the end of the file and automatically
+ * adjust the settings for this buffer only.  This must remain at the end
+ * of the file.
+ * ---------------------------------------------------------------------------
+ * Local variables:
+ * c-file-style: "linux"
+ * End:
+ */
diff --git a/arch/um/include/sysdep-x86_64/sigcontext.h b/arch/um/include/sysdep-x86_64/sigcontext.h
new file mode 100644
index 000000000000..1e38a54ff4cf
--- /dev/null
+++ b/arch/um/include/sysdep-x86_64/sigcontext.h
@@ -0,0 +1,49 @@
+/*
+ * Copyright 2003 PathScale, Inc.
+ *
+ * Licensed under the GPL
+ */
+
+#ifndef __SYSDEP_X86_64_SIGCONTEXT_H
+#define __SYSDEP_X86_64_SIGCONTEXT_H
+
+#include <sysdep/sc.h>
+
+#define IP_RESTART_SYSCALL(ip) ((ip) -= 2)
+
+#define SC_RESTART_SYSCALL(sc) IP_RESTART_SYSCALL(SC_IP(sc))
+#define SC_SET_SYSCALL_RETURN(sc, result) SC_RAX(sc) = (result)
+
+#define SC_FAULT_ADDR(sc) SC_CR2(sc)
+#define SC_FAULT_TYPE(sc) SC_ERR(sc)
+
+#define FAULT_WRITE(err) ((err) & 2)
+
+#define SC_FAULT_WRITE(sc) FAULT_WRITE(SC_FAULT_TYPE(sc))
+
+#define SC_TRAP_TYPE(sc) SC_TRAPNO(sc)
+
+/* ptrace expects that, at the start of a system call, %eax contains
+ * -ENOSYS, so this makes it so.
+ */
+
+#define SC_START_SYSCALL(sc) do SC_RAX(sc) = -ENOSYS; while(0)
+
+#define SEGV_IS_FIXABLE(trap) ((trap) == 14)
+#define SC_SEGV_IS_FIXABLE(sc) SEGV_IS_FIXABLE(SC_TRAP_TYPE(sc))
+
+extern unsigned long *sc_sigmask(void *sc_ptr);
+
+#endif
+
+/*
+ * Overrides for Emacs so that we follow Linus's tabbing style.
+ * Emacs will notice this stuff at the end of the file and automatically
+ * adjust the settings for this buffer only.  This must remain at the end
+ * of the file.
+ * ---------------------------------------------------------------------------
+ * Local variables:
+ * c-file-style: "linux"
+ * End:
+ */
+
diff --git a/arch/um/include/sysdep-x86_64/signal.h b/arch/um/include/sysdep-x86_64/signal.h
new file mode 100644
index 000000000000..e5e52756fab4
--- /dev/null
+++ b/arch/um/include/sysdep-x86_64/signal.h
@@ -0,0 +1,27 @@
+/*
+ * Copyright (C) 2004 PathScale, Inc
+ * Licensed under the GPL
+ */
+
+#ifndef __X86_64_SIGNAL_H_
+#define __X86_64_SIGNAL_H_
+
+#define ARCH_GET_SIGCONTEXT(sc, sig_addr) \
+        do { \
+                struct ucontext *__uc; \
+                asm("movq %%rdx, %0" : "=r" (__uc)); \
+                sc = (struct sigcontext *) &__uc->uc_mcontext; \
+        } while(0)
+
+#endif
+
+/*
+ * Overrides for Emacs so that we follow Linus's tabbing style.
+ * Emacs will notice this stuff at the end of the file and automatically
+ * adjust the settings for this buffer only.  This must remain at the end
+ * of the file.
+ * ---------------------------------------------------------------------------
+ * Local variables:
+ * c-file-style: "linux"
+ * End:
+ */
diff --git a/arch/um/include/sysdep-x86_64/syscalls.h b/arch/um/include/sysdep-x86_64/syscalls.h
new file mode 100644
index 000000000000..b187a4157ff3
--- /dev/null
+++ b/arch/um/include/sysdep-x86_64/syscalls.h
@@ -0,0 +1,91 @@
+/*
+ * Copyright 2003 PathScale, Inc.
+ *
+ * Licensed under the GPL
+ */
+
+#ifndef __SYSDEP_X86_64_SYSCALLS_H__
+#define __SYSDEP_X86_64_SYSCALLS_H__
+
+#include <linux/msg.h>
+#include <linux/shm.h>
+
+typedef long syscall_handler_t(void);
+
+extern syscall_handler_t *ia32_sys_call_table[];
+
+#define EXECUTE_SYSCALL(syscall, regs) \
+        (((long (*)(long, long, long, long, long, long)) \
+          (*sys_call_table[syscall]))(UPT_SYSCALL_ARG1(&regs->regs), \
+                                      UPT_SYSCALL_ARG2(&regs->regs), \
+                                      UPT_SYSCALL_ARG3(&regs->regs), \
+                                      UPT_SYSCALL_ARG4(&regs->regs), \
+                                      UPT_SYSCALL_ARG5(&regs->regs), \
+                                      UPT_SYSCALL_ARG6(&regs->regs)))
+
+extern long old_mmap(unsigned long addr, unsigned long len,
+                     unsigned long prot, unsigned long flags,
+                     unsigned long fd, unsigned long pgoff);
+extern syscall_handler_t wrap_sys_shmat;
+extern syscall_handler_t sys_modify_ldt;
+extern syscall_handler_t sys_arch_prctl;
+
+#define ARCH_SYSCALLS \
+        [ __NR_mmap ] = (syscall_handler_t *) old_mmap, \
+        [ __NR_select ] = (syscall_handler_t *) sys_select, \
+        [ __NR_mincore ] = (syscall_handler_t *) sys_mincore, \
+        [ __NR_madvise ] = (syscall_handler_t *) sys_madvise, \
+        [ __NR_shmget ] = (syscall_handler_t *) sys_shmget, \
+        [ __NR_shmat ] = (syscall_handler_t *) wrap_sys_shmat, \
+        [ __NR_shmctl ] = (syscall_handler_t *) sys_shmctl, \
+        [ __NR_semop ] = (syscall_handler_t *) sys_semop, \
+        [ __NR_semget ] = (syscall_handler_t *) sys_semget, \
+        [ __NR_semctl ] = (syscall_handler_t *) sys_semctl, \
+        [ __NR_shmdt ] = (syscall_handler_t *) sys_shmdt, \
+        [ __NR_msgget ] = (syscall_handler_t *) sys_msgget, \
+        [ __NR_msgsnd ] = (syscall_handler_t *) sys_msgsnd, \
+        [ __NR_msgrcv ] = (syscall_handler_t *) sys_msgrcv, \
+        [ __NR_msgctl ] = (syscall_handler_t *) sys_msgctl, \
+        [ __NR_pivot_root ] = (syscall_handler_t *) sys_pivot_root, \
+        [ __NR_tuxcall ] = (syscall_handler_t *) sys_ni_syscall, \
+        [ __NR_security ] = (syscall_handler_t *) sys_ni_syscall, \
+        [ __NR_epoll_ctl_old ] = (syscall_handler_t *) sys_ni_syscall, \
+        [ __NR_epoll_wait_old ] = (syscall_handler_t *) sys_ni_syscall, \
+        [ __NR_modify_ldt ] = (syscall_handler_t *) sys_modify_ldt, \
+        [ __NR_arch_prctl ] = (syscall_handler_t *) sys_arch_prctl, \
+        [ __NR_socket ] = (syscall_handler_t *) sys_socket, \
+        [ __NR_connect ] = (syscall_handler_t *) sys_connect, \
+        [ __NR_accept ] = (syscall_handler_t *) sys_accept, \
+        [ __NR_recvfrom ] = (syscall_handler_t *) sys_recvfrom, \
+        [ __NR_recvmsg ] = (syscall_handler_t *) sys_recvmsg, \
+        [ __NR_sendmsg ] = (syscall_handler_t *) sys_sendmsg, \
+        [ __NR_bind ] = (syscall_handler_t *) sys_bind, \
+        [ __NR_listen ] = (syscall_handler_t *) sys_listen, \
+        [ __NR_getsockname ] = (syscall_handler_t *) sys_getsockname, \
+        [ __NR_getpeername ] = (syscall_handler_t *) sys_getpeername, \
+        [ __NR_socketpair ] = (syscall_handler_t *) sys_socketpair, \
+        [ __NR_sendto ] = (syscall_handler_t *) sys_sendto, \
+        [ __NR_shutdown ] = (syscall_handler_t *) sys_shutdown, \
+        [ __NR_setsockopt ] = (syscall_handler_t *) sys_setsockopt, \
+        [ __NR_getsockopt ] = (syscall_handler_t *) sys_getsockopt, \
+        [ __NR_iopl ] = (syscall_handler_t *) sys_ni_syscall, \
+        [ __NR_set_thread_area ] = (syscall_handler_t *) sys_ni_syscall, \
+        [ __NR_get_thread_area ] = (syscall_handler_t *) sys_ni_syscall, \
+        [ __NR_semtimedop ] = (syscall_handler_t *) sys_semtimedop, \
+        [ 251 ] = (syscall_handler_t *) sys_ni_syscall,
+
+#define LAST_ARCH_SYSCALL 251
+#define NR_syscalls 1024
+
+#endif
+
+/*
+ * Overrides for Emacs so that we follow Linus's tabbing style.
+ * Emacs will notice this stuff at the end of the file and automatically
+ * adjust the settings for this buffer only.  This must remain at the end
+ * of the file.
+ * ---------------------------------------------------------------------------
+ * Local variables:
+ * c-file-style: "linux"
+ * End:
+ */
diff --git a/arch/um/include/sysrq.h b/arch/um/include/sysrq.h
new file mode 100644
index 000000000000..2ce9423460b3
--- /dev/null
+++ b/arch/um/include/sysrq.h
@@ -0,0 +1,6 @@
+#ifndef __UM_SYSRQ_H
+#define __UM_SYSRQ_H
+
+extern void show_trace(unsigned long *stack);
+
+#endif
diff --git a/arch/um/include/tempfile.h b/arch/um/include/tempfile.h
new file mode 100644
index 000000000000..e36d9e0f5105
--- /dev/null
+++ b/arch/um/include/tempfile.h
@@ -0,0 +1,21 @@
+/* 
+ * Copyright (C) 2000, 2001, 2002 Jeff Dike (jdike@karaya.com)
+ * Licensed under the GPL
+ */
+
+#ifndef __TEMPFILE_H__
+#define __TEMPFILE_H__
+
+extern int make_tempfile(const char *template, char **tempname, int do_unlink);
+
+#endif
+/*
+ * Overrides for Emacs so that we follow Linus's tabbing style.
+ * Emacs will notice this stuff at the end of the file and automatically
+ * adjust the settings for this buffer only.  This must remain at the end
+ * of the file.
+ * ---------------------------------------------------------------------------
+ * Local variables:
+ * c-file-style: "linux"
+ * End:
+ */
diff --git a/arch/um/include/time_user.h b/arch/um/include/time_user.h
new file mode 100644
index 000000000000..6793a2fcd0ae
--- /dev/null
+++ b/arch/um/include/time_user.h
@@ -0,0 +1,18 @@
+/* 
+ * Copyright (C) 2002 Jeff Dike (jdike@karaya.com)
+ * Licensed under the GPL
+ */
+
+#ifndef __TIME_USER_H__
+#define __TIME_USER_H__
+
+extern void timer(void);
+extern void switch_timers(int to_real);
+extern void set_interval(int timer_type);
+extern void idle_sleep(int secs);
+extern void enable_timer(void);
+extern void disable_timer(void);
+extern unsigned long time_lock(void);
+extern void time_unlock(unsigned long);
+
+#endif
diff --git a/arch/um/include/tlb.h b/arch/um/include/tlb.h
new file mode 100644
index 000000000000..da1097285b8c
--- /dev/null
+++ b/arch/um/include/tlb.h
@@ -0,0 +1,67 @@
+/* 
+ * Copyright (C) 2002 Jeff Dike (jdike@karaya.com)
+ * Licensed under the GPL
+ */
+
+#ifndef __TLB_H__
+#define __TLB_H__
+
+#include "um_mmu.h"
+
+struct host_vm_op {
+        enum { MMAP, MUNMAP, MPROTECT } type;
+        union {
+                struct {
+                        unsigned long addr;
+                        unsigned long len;
+                        unsigned int r:1;
+                        unsigned int w:1;
+                        unsigned int x:1;
+                        int fd;
+                        __u64 offset;
+                } mmap;
+                struct {
+                        unsigned long addr;
+                        unsigned long len;
+                } munmap;
+                struct {
+                        unsigned long addr;
+                        unsigned long len;
+                        unsigned int r:1;
+                        unsigned int w:1;
+                        unsigned int x:1;
+                } mprotect;
+        } u;
+};
+
+extern void mprotect_kernel_vm(int w);
+extern void force_flush_all(void);
+extern void fix_range_common(struct mm_struct *mm, unsigned long start_addr,
+                             unsigned long end_addr, int force, int data,
+                             void (*do_ops)(int, struct host_vm_op *, int));
+extern int flush_tlb_kernel_range_common(unsigned long start,
+                                         unsigned long end);
+
+extern int add_mmap(unsigned long virt, unsigned long phys, unsigned long len,
+                    int r, int w, int x, struct host_vm_op *ops, int index,
+                    int last_filled, int data,
+                    void (*do_ops)(int, struct host_vm_op *, int));
+extern int add_munmap(unsigned long addr, unsigned long len,
+                      struct host_vm_op *ops, int index, int last_filled,
+                      int data, void (*do_ops)(int, struct host_vm_op *, int));
+extern int add_mprotect(unsigned long addr, unsigned long len, int r, int w,
+                        int x, struct host_vm_op *ops, int index,
+                        int last_filled, int data,
+                        void (*do_ops)(int, struct host_vm_op *, int));
+#endif
+
+/*
+ * Overrides for Emacs so that we follow Linus's tabbing style.
+ * Emacs will notice this stuff at the end of the file and automatically
+ * adjust the settings for this buffer only.  This must remain at the end
+ * of the file.
+ * ---------------------------------------------------------------------------
+ * Local variables:
+ * c-file-style: "linux"
+ * End:
+ */
diff --git a/arch/um/include/ubd_user.h b/arch/um/include/ubd_user.h
new file mode 100644
index 000000000000..bb66517f0739
--- /dev/null
+++ b/arch/um/include/ubd_user.h
@@ -0,0 +1,26 @@
+/* 
+ * Copyright (C) 2000 Jeff Dike (jdike@karaya.com)
+ * Copyright (C) 2001 RidgeRun, Inc (glonnon@ridgerun.com)
+ * Licensed under the GPL
+ */
+
+#ifndef __UM_UBD_USER_H
+#define __UM_UBD_USER_H
+
+extern void ignore_sigwinch_sig(void);
+extern int start_io_thread(unsigned long sp, int *fds_out);
+extern int io_thread(void *arg);
+extern int kernel_fd;
+
+#endif
+
+/*
+ * Overrides for Emacs so that we follow Linus's tabbing style.
+ * Emacs will notice this stuff at the end of the file and automatically
+ * adjust the settings for this buffer only.  This must remain at the end
+ * of the file.
+ * ---------------------------------------------------------------------------
+ * Local variables:
+ * c-file-style: "linux"
+ * End:
+ */
diff --git a/arch/um/include/um_mmu.h b/arch/um/include/um_mmu.h
new file mode 100644
index 000000000000..0fa643238300
--- /dev/null
+++ b/arch/um/include/um_mmu.h
@@ -0,0 +1,40 @@
+/* 
+ * Copyright (C) 2002 Jeff Dike (jdike@karaya.com)
+ * Licensed under the GPL
+ */
+
+#ifndef __ARCH_UM_MMU_H
+#define __ARCH_UM_MMU_H
+
+#include "uml-config.h"
+#include "choose-mode.h"
+
+#ifdef UML_CONFIG_MODE_TT
+#include "mmu-tt.h"
+#endif
+
+#ifdef UML_CONFIG_MODE_SKAS
+#include "mmu-skas.h"
+#endif
+
+typedef union mm_context {
+#ifdef UML_CONFIG_MODE_TT
+        struct mmu_context_tt tt;
+#endif
+#ifdef UML_CONFIG_MODE_SKAS
+        struct mmu_context_skas skas;
+#endif
+} mm_context_t;
+
+#endif
+
+/*
+ * Overrides for Emacs so that we follow Linus's tabbing style.
+ * Emacs will notice this stuff at the end of the file and automatically
+ * adjust the settings for this buffer only.  This must remain at the end
+ * of the file.
+ * ---------------------------------------------------------------------------
+ * Local variables:
+ * c-file-style: "linux"
+ * End:
+ */
diff --git a/arch/um/include/um_uaccess.h b/arch/um/include/um_uaccess.h
new file mode 100644
index 000000000000..6e348cb6de24
--- /dev/null
+++ b/arch/um/include/um_uaccess.h
@@ -0,0 +1,125 @@
+/* 
+ * Copyright (C) 2002 Jeff Dike (jdike@karaya.com)
+ * Licensed under the GPL
+ */
+
+#ifndef __ARCH_UM_UACCESS_H
+#define __ARCH_UM_UACCESS_H
+
+#include "linux/config.h"
+#include "choose-mode.h"
+
+#ifdef CONFIG_MODE_TT
+#include "uaccess-tt.h"
+#endif
+
+#ifdef CONFIG_MODE_SKAS
+#include "uaccess-skas.h"
+#endif
+
+#define access_ok(type, addr, size) \
+        CHOOSE_MODE_PROC(access_ok_tt, access_ok_skas, type, addr, size)
+
+/* this function will go away soon - use access_ok() instead */
+static inline int __deprecated verify_area(int type, const void __user *addr, unsigned long size)
+{
+        return (CHOOSE_MODE_PROC(verify_area_tt, verify_area_skas, type, addr,
+                                size));
+}
+
+static inline int copy_from_user(void *to, const void __user *from, int n)
+{
+        return(CHOOSE_MODE_PROC(copy_from_user_tt, copy_from_user_skas, to,
+                                from, n));
+}
+
+static inline int copy_to_user(void __user *to, const void *from, int n)
+{
+        return(CHOOSE_MODE_PROC(copy_to_user_tt, copy_to_user_skas, to, 
+                                from, n));
+}
+
+/*
+ * strncpy_from_user: - Copy a NUL terminated string from userspace.
+ * @dst:   Destination address, in kernel space.  This buffer must be at
+ *         least @count bytes long.
+ * @src:   Source address, in user space.
+ * @count: Maximum number of bytes to copy, including the trailing NUL.
+ *
+ * Copies a NUL-terminated string from userspace to kernel space.
+ *
+ * On success, returns the length of the string (not including the trailing
+ * NUL).
+ *
+ * If access to userspace fails, returns -EFAULT (some data may have been
+ * copied).
+ *
+ * If @count is smaller than the length of the string, copies @count bytes
+ * and returns @count.
+ */
+
+static inline int strncpy_from_user(char *dst, const char __user *src, int count)
+{
+        return(CHOOSE_MODE_PROC(strncpy_from_user_tt, strncpy_from_user_skas,
+                                dst, src, count));
+}
+
+/*
+ * __clear_user: - Zero a block of memory in user space, with less checking.
+ * @to:   Destination address, in user space.
+ * @n:    Number of bytes to zero.
+ *
+ * Zero a block of memory in user space.  Caller must check
+ * the specified block with access_ok() before calling this function.
+ *
+ * Returns number of bytes that could not be cleared.
+ * On success, this will be zero.
+ */
+static inline int __clear_user(void *mem, int len)
+{
+        return(CHOOSE_MODE_PROC(__clear_user_tt, __clear_user_skas, mem, len));
+}
+
+/*
+ * clear_user: - Zero a block of memory in user space.
+ * @to:   Destination address, in user space.
+ * @n:    Number of bytes to zero.
+ *
+ * Zero a block of memory in user space.
+ *
+ * Returns number of bytes that could not be cleared.
+ * On success, this will be zero.
+ */
+static inline int clear_user(void __user *mem, int len)
+{
+        return(CHOOSE_MODE_PROC(clear_user_tt, clear_user_skas, mem, len));
+}
+
+/*
+ * strlen_user: - Get the size of a string in user space.
+ * @str: The string to measure.
+ * @n:   The maximum valid length
+ *
+ * Get the size of a NUL-terminated string in user space.
+ *
+ * Returns the size of the string INCLUDING the terminating NUL.
+ * On exception, returns 0.
+ * If the string is too long, returns a value greater than @n.
+ */
+static inline int strnlen_user(const void __user *str, long len)
+{
+        return(CHOOSE_MODE_PROC(strnlen_user_tt, strnlen_user_skas, str, len));
+}
+
+#endif
+
+/*
+ * Overrides for Emacs so that we follow Linus's tabbing style.
+ * Emacs will notice this stuff at the end of the file and automatically
+ * adjust the settings for this buffer only.  This must remain at the end
+ * of the file.
+ * ---------------------------------------------------------------------------
+ * Local variables:
+ * c-file-style: "linux"
+ * End:
+ */
diff --git a/arch/um/include/umid.h b/arch/um/include/umid.h
new file mode 100644
index 000000000000..11373c851f15
--- /dev/null
+++ b/arch/um/include/umid.h
@@ -0,0 +1,22 @@
+/*
+ * Copyright (C) 2001 Jeff Dike (jdike@karaya.com)
+ * Licensed under the GPL
+ */
+
+#ifndef __UMID_H__
+#define __UMID_H__
+
+extern int umid_file_name(char *name, char *buf, int len);
+
+#endif
+
+/*
+ * Overrides for Emacs so that we follow Linus's tabbing style.
+ * Emacs will notice this stuff at the end of the file and automatically
+ * adjust the settings for this buffer only.  This must remain at the end
+ * of the file.
+ * ---------------------------------------------------------------------------
+ * Local variables:
+ * c-file-style: "linux"
+ * End:
+ */
diff --git a/arch/um/include/uml_uaccess.h b/arch/um/include/uml_uaccess.h
new file mode 100644
index 000000000000..f77eb6428453
--- /dev/null
+++ b/arch/um/include/uml_uaccess.h
@@ -0,0 +1,28 @@
+/*
+ * Copyright (C) 2001 Jeff Dike (jdike@karaya.com)
+ * Licensed under the GPL
+ */
+
+#ifndef __UML_UACCESS_H__
+#define __UML_UACCESS_H__
+
+extern int __do_copy_to_user(void *to, const void *from, int n,
+                             void **fault_addr, void **fault_catcher);
+extern unsigned long __do_user_copy(void *to, const void *from, int n,
+                                    void **fault_addr, void **fault_catcher,
+                                    void (*op)(void *to, const void *from,
+                                               int n), int *faulted_out);
+void __do_copy(void *to, const void *from, int n);
+
+#endif
+
+/*
+ * Overrides for Emacs so that we follow Linus's tabbing style.
+ * Emacs will notice this stuff at the end of the file and automatically
+ * adjust the settings for this buffer only.  This must remain at the end
+ * of the file.
+ * ---------------------------------------------------------------------------
+ * Local variables:
+ * c-file-style: "linux"
+ * End:
+ */
diff --git a/arch/um/include/user.h b/arch/um/include/user.h
new file mode 100644
index 000000000000..57ee9e261228
--- /dev/null
+++ b/arch/um/include/user.h
@@ -0,0 +1,32 @@
+/* 
+ * Copyright (C) 2000 Jeff Dike (jdike@karaya.com)
+ * Licensed under the GPL
+ */
+
+#ifndef __USER_H__
+#define __USER_H__
+
+extern void panic(const char *fmt, ...);
+extern int printk(const char *fmt, ...);
+extern void schedule(void);
+extern void *um_kmalloc(int size);
+extern void *um_kmalloc_atomic(int size);
+extern void kfree(void *ptr);
+extern int in_aton(char *str);
+extern int open_gdb_chan(void);
+extern int strlcpy(char *, const char *, int);
+extern void *um_vmalloc(int size);
+extern void vfree(void *ptr);
+
+#endif
+
+/*
+ * Overrides for Emacs so that we follow Linus's tabbing style.
+ * Emacs will notice this stuff at the end of the file and automatically
+ * adjust the settings for this buffer only.  This must remain at the end
+ * of the file.
+ * ---------------------------------------------------------------------------
+ * Local variables:
+ * c-file-style: "linux"
+ * End:
+ */
diff --git a/arch/um/include/user_util.h b/arch/um/include/user_util.h
new file mode 100644
index 000000000000..103cd320386c
--- /dev/null
+++ b/arch/um/include/user_util.h
@@ -0,0 +1,106 @@
+/* 
+ * Copyright (C) 2000, 2001, 2002 Jeff Dike (jdike@karaya.com)
+ * Licensed under the GPL
+ */
+
+#ifndef __USER_UTIL_H__
+#define __USER_UTIL_H__
+
+#include "sysdep/ptrace.h"
+
+#define CATCH_EINTR(expr) while ((errno = 0, ((expr) < 0)) && (errno == EINTR))
+
+extern int mode_tt;
+
+extern int grantpt(int __fd);
+extern int unlockpt(int __fd);
+extern char *ptsname(int __fd);
+
+struct cpu_task {
+        int pid;
+        void *task;
+};
+
+extern struct cpu_task cpu_tasks[];
+
+struct signal_info {
+        void (*handler)(int, union uml_pt_regs *);
+        int is_irq;
+};
+
+extern struct signal_info sig_info[];
+
+extern unsigned long low_physmem;
+extern unsigned long high_physmem;
+extern unsigned long uml_physmem;
+extern unsigned long uml_reserved;
+extern unsigned long end_vm;
+extern unsigned long start_vm;
+extern unsigned long highmem;
+
+extern char host_info[];
+
+extern char saved_command_line[];
+extern char command_line[];
+
+extern char *tempdir;
+
+extern unsigned long _stext, _etext, _sdata, _edata, __bss_start, _end;
+extern unsigned long _unprotected_end;
+extern unsigned long brk_start;
+
+extern int pty_output_sigio;
+extern int pty_close_sigio;
+
+extern void stop(void);
+extern void stack_protections(unsigned long address);
+extern void task_protections(unsigned long address);
+extern int wait_for_stop(int pid, int sig, int cont_type, void *relay);
+extern void *add_signal_handler(int sig, void (*handler)(int));
+extern int start_fork_tramp(void *arg, unsigned long temp_stack, 
+                            int clone_flags, int (*tramp)(void *));
+extern int linux_main(int argc, char **argv);
+extern void set_cmdline(char *cmd);
+extern void input_cb(void (*proc)(void *), void *arg, int arg_len);
+extern int get_pty(void);
+extern void *um_kmalloc(int size);
+extern int switcheroo(int fd, int prot, void *from, void *to, int size);
+extern void setup_machinename(char *machine_out);
+extern void setup_hostinfo(void);
+extern void add_arg(char *arg);
+extern void init_new_thread_stack(void *sig_stack, void (*usr1_handler)(int));
+extern void init_new_thread_signals(int altstack);
+extern void do_exec(int old_pid, int new_pid);
+extern void tracer_panic(char *msg, ...);
+extern char *get_umid(int only_if_set);
+extern void do_longjmp(void *p, int val);
+extern int detach(int pid, int sig);
+extern int attach(int pid);
+extern void kill_child_dead(int pid);
+extern int cont(int pid);
+extern void check_ptrace(void);
+extern void check_sigio(void);
+extern int run_kernel_thread(int (*fn)(void *), void *arg, void **jmp_ptr);
+extern void write_sigio_workaround(void);
+extern void arch_check_bugs(void);
+extern int cpu_feature(char *what, char *buf, int len);
+extern int arch_handle_signal(int sig, union uml_pt_regs *regs);
+extern int arch_fixup(unsigned long address, void *sc_ptr);
+extern void forward_pending_sigio(int target);
+extern int can_do_skas(void);
+extern void arch_init_thread(void);
+extern int setjmp_wrapper(void (*proc)(void *, void *), ...);
+extern int raw(int fd);
+
+#endif
+
+/*
+ * Overrides for Emacs so that we follow Linus's tabbing style.
+ * Emacs will notice this stuff at the end of the file and automatically
+ * adjust the settings for this buffer only.  This must remain at the end
+ * of the file.
+ * ---------------------------------------------------------------------------
+ * Local variables:
+ * c-file-style: "linux"
+ * End:
+ */