33 files changed, 59 insertions, 557 deletions

diff --git a/arch/um/os-Linux/Makefile b/arch/um/os-Linux/Makefile
index b33f4dfe7ae..dd764101e48 100644
--- a/arch/um/os-Linux/Makefile
+++ b/arch/um/os-Linux/Makefile
@@ -4,14 +4,14 @@
 #
 
 obj-y = aio.o execvp.o file.o helper.o irq.o main.o mem.o process.o \
-        registers.o sigio.o signal.o start_up.o time.o tty.o uaccess.o \
-        umid.o tls.o user_syms.o util.o drivers/ sys-$(SUBARCH)/ skas/
+        registers.o sigio.o signal.o start_up.o time.o tty.o \
+        umid.o user_syms.o util.o drivers/ skas/
 
 obj-$(CONFIG_ARCH_REUSE_HOST_VSYSCALL_AREA) += elf_aux.o
 
 USER_OBJS := $(user-objs-y) aio.o elf_aux.o execvp.o file.o helper.o irq.o \
         main.o mem.o process.o registers.o sigio.o signal.o start_up.o time.o \
-        tty.o tls.o uaccess.o umid.o util.o
+        tty.o umid.o util.o
 
 CFLAGS_user_syms.o += -DSUBARCH_$(SUBARCH)
 
diff --git a/arch/um/os-Linux/aio.c b/arch/um/os-Linux/aio.c
index 57e3d46c989..c5d039e1ff3 100644
--- a/arch/um/os-Linux/aio.c
+++ b/arch/um/os-Linux/aio.c
@@ -11,10 +11,8 @@
 #include <asm/unistd.h>
 #include "aio.h"
 #include "init.h"
-#include "kern_constants.h"
 #include "kern_util.h"
 #include "os.h"
-#include "user.h"
 
 struct aio_thread_req {
         enum aio_type type;
diff --git a/arch/um/os-Linux/drivers/ethertap_user.c b/arch/um/os-Linux/drivers/ethertap_user.c
index cc72cb2c1af..db3d6481375 100644
--- a/arch/um/os-Linux/drivers/ethertap_user.c
+++ b/arch/um/os-Linux/drivers/ethertap_user.c
@@ -13,11 +13,9 @@
 #include <sys/socket.h>
 #include <sys/wait.h>
 #include "etap.h"
-#include "kern_constants.h"
 #include "os.h"
 #include "net_user.h"
 #include "um_malloc.h"
-#include "user.h"
 
 #define MAX_PACKET ETH_MAX_PACKET
 
diff --git a/arch/um/os-Linux/drivers/tuntap_user.c b/arch/um/os-Linux/drivers/tuntap_user.c
index 2448be03fd7..a2aacffdd90 100644
--- a/arch/um/os-Linux/drivers/tuntap_user.c
+++ b/arch/um/os-Linux/drivers/tuntap_user.c
@@ -13,11 +13,9 @@
 #include <sys/socket.h>
 #include <sys/wait.h>
 #include <sys/uio.h>
-#include "kern_constants.h"
 #include "kern_util.h"
 #include "os.h"
 #include "tuntap.h"
-#include "user.h"
 
 static int tuntap_user_init(void *data, void *dev)
 {
diff --git a/arch/um/os-Linux/elf_aux.c b/arch/um/os-Linux/elf_aux.c
index 95332379938..d895271ad6f 100644
--- a/arch/um/os-Linux/elf_aux.c
+++ b/arch/um/os-Linux/elf_aux.c
@@ -12,7 +12,6 @@
 #include "init.h"
 #include "elf_user.h"
 #include "mem_user.h"
-#include <kern_constants.h>
 
 typedef Elf32_auxv_t elf_auxv_t;
 
diff --git a/arch/um/os-Linux/file.c b/arch/um/os-Linux/file.c
index 140e587bc0a..b049a63bb74 100644
--- a/arch/um/os-Linux/file.c
+++ b/arch/um/os-Linux/file.c
@@ -13,9 +13,7 @@
 #include <sys/socket.h>
 #include <sys/stat.h>
 #include <sys/un.h>
-#include "kern_constants.h"
 #include "os.h"
-#include "user.h"
 
 static void copy_stat(struct uml_stat *dst, const struct stat64 *src)
 {
diff --git a/arch/um/os-Linux/helper.c b/arch/um/os-Linux/helper.c
index feff22d6467..cf26c4a9a43 100644
--- a/arch/um/os-Linux/helper.c
+++ b/arch/um/os-Linux/helper.c
@@ -10,11 +10,9 @@
 #include <linux/limits.h>
 #include <sys/socket.h>
 #include <sys/wait.h>
-#include "kern_constants.h"
 #include "kern_util.h"
 #include "os.h"
 #include "um_malloc.h"
-#include "user.h"
 
 struct helper_data {
         void (*pre_exec)(void*);
diff --git a/arch/um/os-Linux/internal.h b/arch/um/os-Linux/internal.h
new file mode 100644
index 00000000000..2c3c3ecd8c0
--- /dev/null
+++ b/arch/um/os-Linux/internal.h
@@ -0,0 +1 @@
+void alarm_handler(int, mcontext_t *);
diff --git a/arch/um/os-Linux/irq.c b/arch/um/os-Linux/irq.c
index 0348b975e81..9a49908b576 100644
--- a/arch/um/os-Linux/irq.c
+++ b/arch/um/os-Linux/irq.c
@@ -9,11 +9,8 @@
 #include <signal.h>
 #include <string.h>
 #include "irq_user.h"
-#include "kern_constants.h"
 #include "os.h"
-#include "process.h"
 #include "um_malloc.h"
-#include "user.h"
 
 /*
  * Locked by irq_lock in arch/um/kernel/irq.c.  Changed by os_create_pollfd
diff --git a/arch/um/os-Linux/main.c b/arch/um/os-Linux/main.c
index 8471b817d94..7a86dd516eb 100644
--- a/arch/um/os-Linux/main.c
+++ b/arch/um/os-Linux/main.c
@@ -12,7 +12,6 @@
 #include <sys/resource.h>
 #include "as-layout.h"
 #include "init.h"
-#include "kern_constants.h"
 #include "kern_util.h"
 #include "os.h"
 #include "um_malloc.h"
diff --git a/arch/um/os-Linux/mem.c b/arch/um/os-Linux/mem.c
index 62878cf1d33..8e421e1d6d3 100644
--- a/arch/um/os-Linux/mem.c
+++ b/arch/um/os-Linux/mem.c
@@ -14,9 +14,7 @@
 #include <sys/mman.h>
 #include <sys/param.h>
 #include "init.h"
-#include "kern_constants.h"
 #include "os.h"
-#include "user.h"
 
 /* Modified by which_tmpdir, which is called during early boot */
 static char *default_tmpdir = "/tmp";
diff --git a/arch/um/os-Linux/process.c b/arch/um/os-Linux/process.c
index 0c45dc8efb0..307f173e7f8 100644
--- a/arch/um/os-Linux/process.c
+++ b/arch/um/os-Linux/process.c
@@ -13,12 +13,9 @@
 #include <sys/wait.h>
 #include <asm/unistd.h>
 #include "init.h"
-#include "kern_constants.h"
 #include "longjmp.h"
 #include "os.h"
-#include "process.h"
 #include "skas_ptrace.h"
-#include "user.h"
 
 #define ARBITRARY_ADDR -1
 #define FAILURE_PID    -1
@@ -237,21 +234,13 @@ out:
 
 void init_new_thread_signals(void)
 {
-        set_handler(SIGSEGV, (__sighandler_t) sig_handler, SA_ONSTACK,
-                    SIGUSR1, SIGIO, SIGWINCH, SIGVTALRM, -1);
-        set_handler(SIGTRAP, (__sighandler_t) sig_handler, SA_ONSTACK,
-                    SIGUSR1, SIGIO, SIGWINCH, SIGVTALRM, -1);
-        set_handler(SIGFPE, (__sighandler_t) sig_handler, SA_ONSTACK,
-                    SIGUSR1, SIGIO, SIGWINCH, SIGVTALRM, -1);
-        set_handler(SIGILL, (__sighandler_t) sig_handler, SA_ONSTACK,
-                    SIGUSR1, SIGIO, SIGWINCH, SIGVTALRM, -1);
-        set_handler(SIGBUS, (__sighandler_t) sig_handler, SA_ONSTACK,
-                    SIGUSR1, SIGIO, SIGWINCH, SIGVTALRM, -1);
+        set_handler(SIGSEGV);
+        set_handler(SIGTRAP);
+        set_handler(SIGFPE);
+        set_handler(SIGILL);
+        set_handler(SIGBUS);
         signal(SIGHUP, SIG_IGN);
-
-        set_handler(SIGIO, (__sighandler_t) sig_handler,
-                    SA_ONSTACK | SA_RESTART, SIGUSR1, SIGIO, SIGWINCH, SIGALRM,
-                    SIGVTALRM, -1);
+        set_handler(SIGIO);
         signal(SIGWINCH, SIG_IGN);
         signal(SIGTERM, SIG_DFL);
 }
diff --git a/arch/um/os-Linux/sigio.c b/arch/um/os-Linux/sigio.c
index 63d299df152..3c161218c67 100644
--- a/arch/um/os-Linux/sigio.c
+++ b/arch/um/os-Linux/sigio.c
@@ -11,14 +11,11 @@
 #include <sched.h>
 #include <signal.h>
 #include <string.h>
-#include "kern_constants.h"
 #include "kern_util.h"
 #include "init.h"
 #include "os.h"
-#include "process.h"
 #include "sigio.h"
 #include "um_malloc.h"
-#include "user.h"
 
 /*
  * Protected by sigio_lock(), also used by sigio_cleanup, which is an
diff --git a/arch/um/os-Linux/signal.c b/arch/um/os-Linux/signal.c
index 6ae180703a6..2d22f1fcd8e 100644
--- a/arch/um/os-Linux/signal.c
+++ b/arch/um/os-Linux/signal.c
@@ -12,13 +12,7 @@
 #include "as-layout.h"
 #include "kern_util.h"
 #include "os.h"
-#include "process.h"
-#include "sysdep/barrier.h"
-#include "sysdep/sigcontext.h"
-#include "user.h"
-
-/* Copied from linux/compiler-gcc.h since we can't include it directly */
-#define barrier() __asm__ __volatile__("": : :"memory")
+#include "sysdep/mcontext.h"
 
 void (*sig_info[NSIG])(int, struct uml_pt_regs *) = {
         [SIGTRAP]       = relay_signal,
@@ -30,7 +24,7 @@ void (*sig_info[NSIG])(int, struct uml_pt_regs *) = {
         [SIGIO]         = sigio_handler,
         [SIGVTALRM]     = timer_handler };
 
-static void sig_handler_common(int sig, struct sigcontext *sc)
+static void sig_handler_common(int sig, mcontext_t *mc)
 {
         struct uml_pt_regs r;
         int save_errno = errno;
@@ -38,8 +32,8 @@ static void sig_handler_common(int sig, struct sigcontext *sc)
         r.is_user = 0;
         if (sig == SIGSEGV) {
                 /* For segfaults, we want the data from the sigcontext. */
-                copy_sc(&r, sc);
-                GET_FAULTINFO_FROM_SC(r.faultinfo, sc);
+                get_regs_from_mc(&r, mc);
+                GET_FAULTINFO_FROM_MC(r.faultinfo, mc);
         }
 
         /* enable signals if sig isn't IRQ signal */
@@ -66,7 +60,7 @@ static void sig_handler_common(int sig, struct sigcontext *sc)
 static int signals_enabled;
 static unsigned int signals_pending;
 
-void sig_handler(int sig, struct sigcontext *sc)
+void sig_handler(int sig, mcontext_t *mc)
 {
         int enabled;
 
@@ -78,23 +72,23 @@ void sig_handler(int sig, struct sigcontext *sc)
 
         block_signals();
 
-        sig_handler_common(sig, sc);
+        sig_handler_common(sig, mc);
 
         set_signals(enabled);
 }
 
-static void real_alarm_handler(struct sigcontext *sc)
+static void real_alarm_handler(mcontext_t *mc)
 {
         struct uml_pt_regs regs;
 
-        if (sc != NULL)
-                copy_sc(&regs, sc);
+        if (mc != NULL)
+                get_regs_from_mc(&regs, mc);
         regs.is_user = 0;
         unblock_signals();
         timer_handler(SIGVTALRM, &regs);
 }
 
-void alarm_handler(int sig, struct sigcontext *sc)
+void alarm_handler(int sig, mcontext_t *mc)
 {
         int enabled;
 
@@ -106,14 +100,13 @@ void alarm_handler(int sig, struct sigcontext *sc)
 
         block_signals();
 
-        real_alarm_handler(sc);
+        real_alarm_handler(mc);
         set_signals(enabled);
 }
 
 void timer_init(void)
 {
-        set_handler(SIGVTALRM, (__sighandler_t) alarm_handler,
-                    SA_ONSTACK | SA_RESTART, SIGUSR1, SIGIO, SIGWINCH, -1);
+        set_handler(SIGVTALRM);
 }
 
 void set_sigstack(void *sig_stack, int size)
@@ -126,10 +119,23 @@ void set_sigstack(void *sig_stack, int size)
                 panic("enabling signal stack failed, errno = %d\n", errno);
 }
 
-static void (*handlers[_NSIG])(int sig, struct sigcontext *sc);
+static void (*handlers[_NSIG])(int sig, mcontext_t *mc) = {
+        [SIGSEGV] = sig_handler,
+        [SIGBUS] = sig_handler,
+        [SIGILL] = sig_handler,
+        [SIGFPE] = sig_handler,
+        [SIGTRAP] = sig_handler,
+
+        [SIGIO] = sig_handler,
+        [SIGWINCH] = sig_handler,
+        [SIGVTALRM] = alarm_handler
+};
+
 
-void handle_signal(int sig, struct sigcontext *sc)
+static void hard_handler(int sig, siginfo_t *info, void *p)
 {
+        struct ucontext *uc = p;
+        mcontext_t *mc = &uc->uc_mcontext;
         unsigned long pending = 1UL << sig;
 
         do {
@@ -155,7 +161,7 @@ void handle_signal(int sig, struct sigcontext *sc)
                 while ((sig = ffs(pending)) != 0){
                         sig--;
                         pending &= ~(1 << sig);
-                        (*handlers[sig])(sig, sc);
+                        (*handlers[sig])(sig, mc);
                 }
 
                 /*
@@ -169,28 +175,26 @@ void handle_signal(int sig, struct sigcontext *sc)
         } while (pending);
 }
 
-extern void hard_handler(int sig);
-
-void set_handler(int sig, void (*handler)(int), int flags, ...)
+void set_handler(int sig)
 {
         struct sigaction action;
-        va_list ap;
+        int flags = SA_SIGINFO | SA_ONSTACK;
         sigset_t sig_mask;
-        int mask;
 
-        handlers[sig] = (void (*)(int, struct sigcontext *)) handler;
-        action.sa_handler = hard_handler;
+        action.sa_sigaction = hard_handler;
 
+        /* block irq ones */
         sigemptyset(&action.sa_mask);
-
-        va_start(ap, flags);
-        while ((mask = va_arg(ap, int)) != -1)
-                sigaddset(&action.sa_mask, mask);
-        va_end(ap);
+        sigaddset(&action.sa_mask, SIGVTALRM);
+        sigaddset(&action.sa_mask, SIGIO);
+        sigaddset(&action.sa_mask, SIGWINCH);
 
         if (sig == SIGSEGV)
                 flags |= SA_NODEFER;
 
+        if (sigismember(&action.sa_mask, sig))
+                flags |= SA_RESTART; /* if it's an irq signal */
+
         action.sa_flags = flags;
         action.sa_restorer = NULL;
         if (sigaction(sig, &action, NULL) < 0)
diff --git a/arch/um/os-Linux/skas/mem.c b/arch/um/os-Linux/skas/mem.c
index e771398be5f..c0afff7af4b 100644
--- a/arch/um/os-Linux/skas/mem.c
+++ b/arch/um/os-Linux/skas/mem.c
@@ -9,7 +9,6 @@
 #include <string.h>
 #include <sys/mman.h>
 #include "init.h"
-#include "kern_constants.h"
 #include "as-layout.h"
 #include "mm_id.h"
 #include "os.h"
@@ -17,7 +16,6 @@
 #include "ptrace_user.h"
 #include "registers.h"
 #include "skas.h"
-#include "user.h"
 #include "sysdep/ptrace.h"
 #include "sysdep/stub.h"
 
diff --git a/arch/um/os-Linux/skas/process.c b/arch/um/os-Linux/skas/process.c
index dee0e8cf8ad..cd65727854e 100644
--- a/arch/um/os-Linux/skas/process.c
+++ b/arch/um/os-Linux/skas/process.c
@@ -9,31 +9,23 @@
 #include <errno.h>
 #include <string.h>
 #include <sys/mman.h>
-#include <sys/ptrace.h>
 #include <sys/wait.h>
 #include <asm/unistd.h>
 #include "as-layout.h"
-#include "chan_user.h"
-#include "kern_constants.h"
+#include "init.h"
 #include "kern_util.h"
 #include "mem.h"
 #include "os.h"
-#include "process.h"
 #include "proc_mm.h"
 #include "ptrace_user.h"
 #include "registers.h"
 #include "skas.h"
 #include "skas_ptrace.h"
-#include "user.h"
 #include "sysdep/stub.h"
 
 int is_skas_winch(int pid, int fd, void *data)
 {
-        if (pid != getpgrp())
-                return 0;
-
-        register_winch_irq(-1, fd, -1, data, 0);
-        return 1;
+        return pid == getpgrp();
 }
 
 static int ptrace_dump_regs(int pid)
@@ -169,7 +161,7 @@ static void handle_trap(int pid, struct uml_pt_regs *regs,
 
         if (!local_using_sysemu)
         {
-                err = ptrace(PTRACE_POKEUSR, pid, PT_SYSCALL_NR_OFFSET,
+                err = ptrace(PTRACE_POKEUSER, pid, PT_SYSCALL_NR_OFFSET,
                              __NR_getpid);
                 if (err < 0) {
                         printk(UM_KERN_ERR "handle_trap - nullifying syscall "
@@ -257,8 +249,8 @@ static int userspace_tramp(void *stack)
 
                 set_sigstack((void *) STUB_DATA, UM_KERN_PAGE_SIZE);
                 sigemptyset(&sa.sa_mask);
-                sa.sa_flags = SA_ONSTACK | SA_NODEFER;
-                sa.sa_handler = (void *) v;
+                sa.sa_flags = SA_ONSTACK | SA_NODEFER | SA_SIGINFO;
+                sa.sa_sigaction = (void *) v;
                 sa.sa_restorer = NULL;
                 if (sigaction(SIGSEGV, &sa, NULL) < 0) {
                         printk(UM_KERN_ERR "userspace_tramp - setting SIGSEGV "
@@ -661,8 +653,7 @@ int start_idle_thread(void *stack, jmp_buf *switch_buf)
 {
         int n;
 
-        set_handler(SIGWINCH, (__sighandler_t) sig_handler,
-                    SA_ONSTACK | SA_RESTART, SIGUSR1, SIGIO, SIGVTALRM, -1);
+        set_handler(SIGWINCH);
 
         /*
          * Can't use UML_SETJMP or UML_LONGJMP here because they save
diff --git a/arch/um/os-Linux/start_up.c b/arch/um/os-Linux/start_up.c
index 02ee9adff54..425162e22af 100644
--- a/arch/um/os-Linux/start_up.c
+++ b/arch/um/os-Linux/start_up.c
@@ -13,12 +13,10 @@
 #include <signal.h>
 #include <string.h>
 #include <sys/mman.h>
-#include <sys/ptrace.h>
 #include <sys/stat.h>
 #include <sys/wait.h>
 #include <asm/unistd.h>
 #include "init.h"
-#include "kern_constants.h"
 #include "os.h"
 #include "mem_user.h"
 #include "ptrace_user.h"
@@ -225,7 +223,7 @@ static void __init check_sysemu(void)
                 goto fail;
         }
 
-        n = ptrace(PTRACE_POKEUSR, pid, PT_SYSCALL_RET_OFFSET, os_getpid());
+        n = ptrace(PTRACE_POKEUSER, pid, PT_SYSCALL_RET_OFFSET, os_getpid());
         if (n < 0) {
                 non_fatal("check_sysemu : failed to modify system call "
                           "return");
@@ -261,7 +259,7 @@ static void __init check_sysemu(void)
                                           "doesn't singlestep");
                                 goto fail;
                         }
-                        n = ptrace(PTRACE_POKEUSR, pid, PT_SYSCALL_RET_OFFSET,
+                        n = ptrace(PTRACE_POKEUSER, pid, PT_SYSCALL_RET_OFFSET,
                                    os_getpid());
                         if (n < 0)
                                 fatal_perror("check_sysemu : failed to modify "
@@ -317,10 +315,10 @@ static void __init check_ptrace(void)
                         fatal("check_ptrace : expected (SIGTRAP|0x80), "
                                "got status = %d", status);
 
-                syscall = ptrace(PTRACE_PEEKUSR, pid, PT_SYSCALL_NR_OFFSET,
+                syscall = ptrace(PTRACE_PEEKUSER, pid, PT_SYSCALL_NR_OFFSET,
                                  0);
                 if (syscall == __NR_getpid) {
-                        n = ptrace(PTRACE_POKEUSR, pid, PT_SYSCALL_NR_OFFSET,
+                        n = ptrace(PTRACE_POKEUSER, pid, PT_SYSCALL_NR_OFFSET,
                                    __NR_getppid);
                         if (n < 0)
                                 fatal_perror("check_ptrace : failed to modify "
diff --git a/arch/um/os-Linux/sys-i386/Makefile b/arch/um/os-Linux/sys-i386/Makefile
deleted file mode 100644
index b4bc6ac4f30..00000000000
--- a/arch/um/os-Linux/sys-i386/Makefile
+++ /dev/null
@@ -1,10 +0,0 @@
-#
-# Copyright (C) 2000 - 2007 Jeff Dike (jdike@{addtoit,linux.intel}.com)
-# Licensed under the GPL
-#
-
-obj-y = registers.o signal.o task_size.o tls.o
-
-USER_OBJS := $(obj-y)
-
-include arch/um/scripts/Makefile.rules
diff --git a/arch/um/os-Linux/sys-i386/registers.c b/arch/um/os-Linux/sys-i386/registers.c
deleted file mode 100644
index 229f7a53d8d..00000000000
--- a/arch/um/os-Linux/sys-i386/registers.c
+++ /dev/null
@@ -1,91 +0,0 @@
-/*
- * Copyright (C) 2004 PathScale, Inc
- * Copyright (C) 2004 - 2007 Jeff Dike (jdike@{addtoit,linux.intel}.com)
- * Licensed under the GPL
- */
-
-#include <errno.h>
-#include <sys/ptrace.h>
-#include <sys/user.h>
-#include "kern_constants.h"
-#include "longjmp.h"
-#include "user.h"
-#include "sysdep/ptrace_user.h"
-
-int save_fp_registers(int pid, unsigned long *fp_regs)
-{
-        if (ptrace(PTRACE_GETFPREGS, pid, 0, fp_regs) < 0)
-                return -errno;
-        return 0;
-}
-
-int restore_fp_registers(int pid, unsigned long *fp_regs)
-{
-        if (ptrace(PTRACE_SETFPREGS, pid, 0, fp_regs) < 0)
-                return -errno;
-        return 0;
-}
-
-int save_fpx_registers(int pid, unsigned long *fp_regs)
-{
-        if (ptrace(PTRACE_GETFPXREGS, pid, 0, fp_regs) < 0)
-                return -errno;
-        return 0;
-}
-
-int restore_fpx_registers(int pid, unsigned long *fp_regs)
-{
-        if (ptrace(PTRACE_SETFPXREGS, pid, 0, fp_regs) < 0)
-                return -errno;
-        return 0;
-}
-
-unsigned long get_thread_reg(int reg, jmp_buf *buf)
-{
-        switch (reg) {
-        case EIP:
-                return buf[0]->__eip;
-        case UESP:
-                return buf[0]->__esp;
-        case EBP:
-                return buf[0]->__ebp;
-        default:
-                printk(UM_KERN_ERR "get_thread_regs - unknown register %d\n",
-                       reg);
-                return 0;
-        }
-}
-
-int have_fpx_regs = 1;
-
-int get_fp_registers(int pid, unsigned long *regs)
-{
-        if (have_fpx_regs)
-                return save_fpx_registers(pid, regs);
-        else
-                return save_fp_registers(pid, regs);
-}
-
-int put_fp_registers(int pid, unsigned long *regs)
-{
-        if (have_fpx_regs)
-                return restore_fpx_registers(pid, regs);
-        else
-                return restore_fp_registers(pid, regs);
-}
-
-void arch_init_registers(int pid)
-{
-        struct user_fpxregs_struct fpx_regs;
-        int err;
-
-        err = ptrace(PTRACE_GETFPXREGS, pid, 0, &fpx_regs);
-        if (!err)
-                return;
-
-        if (errno != EIO)
-                panic("check_ptrace : PTRACE_GETFPXREGS failed, errno = %d",
-                      errno);
-
-        have_fpx_regs = 0;
-}
diff --git a/arch/um/os-Linux/sys-i386/signal.c b/arch/um/os-Linux/sys-i386/signal.c
deleted file mode 100644
index f311609f93d..00000000000
--- a/arch/um/os-Linux/sys-i386/signal.c
+++ /dev/null
@@ -1,13 +0,0 @@
-/*
- * Copyright (C) 2006 Jeff Dike (jdike@{addtoit,linux.intel}.com)
- * Licensed under the GPL
- */
-
-#include <signal.h>
-
-extern void handle_signal(int sig, struct sigcontext *sc);
-
-void hard_handler(int sig)
-{
-        handle_signal(sig, (struct sigcontext *) (&sig + 1));
-}
diff --git a/arch/um/os-Linux/sys-i386/task_size.c b/arch/um/os-Linux/sys-i386/task_size.c
deleted file mode 100644
index be04c1e183b..00000000000
--- a/arch/um/os-Linux/sys-i386/task_size.c
+++ /dev/null
@@ -1,139 +0,0 @@
-#include <stdio.h>
-#include <stdlib.h>
-#include <signal.h>
-#include <sys/mman.h>
-#include "longjmp.h"
-#include "kern_constants.h"
-
-static jmp_buf buf;
-
-static void segfault(int sig)
-{
-        longjmp(buf, 1);
-}
-
-static int page_ok(unsigned long page)
-{
-        unsigned long *address = (unsigned long *) (page << UM_KERN_PAGE_SHIFT);
-        unsigned long n = ~0UL;
-        void *mapped = NULL;
-        int ok = 0;
-
-        /*
-         * First see if the page is readable.  If it is, it may still
-         * be a VDSO, so we go on to see if it's writable.  If not
-         * then try mapping memory there.  If that fails, then we're
-         * still in the kernel area.  As a sanity check, we'll fail if
-         * the mmap succeeds, but gives us an address different from
-         * what we wanted.
-         */
-        if (setjmp(buf) == 0)
-                n = *address;
-        else {
-                mapped = mmap(address, UM_KERN_PAGE_SIZE,
-                              PROT_READ | PROT_WRITE,
-                              MAP_FIXED | MAP_PRIVATE | MAP_ANONYMOUS, -1, 0);
-                if (mapped == MAP_FAILED)
-                        return 0;
-                if (mapped != address)
-                        goto out;
-        }
-
-        /*
-         * Now, is it writeable?  If so, then we're in user address
-         * space.  If not, then try mprotecting it and try the write
-         * again.
-         */
-        if (setjmp(buf) == 0) {
-                *address = n;
-                ok = 1;
-                goto out;
-        } else if (mprotect(address, UM_KERN_PAGE_SIZE,
-                            PROT_READ | PROT_WRITE) != 0)
-                goto out;
-
-        if (setjmp(buf) == 0) {
-                *address = n;
-                ok = 1;
-        }
-
- out:
-        if (mapped != NULL)
-                munmap(mapped, UM_KERN_PAGE_SIZE);
-        return ok;
-}
-
-unsigned long os_get_top_address(void)
-{
-        struct sigaction sa, old;
-        unsigned long bottom = 0;
-        /*
-         * A 32-bit UML on a 64-bit host gets confused about the VDSO at
-         * 0xffffe000.  It is mapped, is readable, can be reprotected writeable
-         * and written.  However, exec discovers later that it can't be
-         * unmapped.  So, just set the highest address to be checked to just
-         * below it.  This might waste some address space on 4G/4G 32-bit
-         * hosts, but shouldn't hurt otherwise.
-         */
-        unsigned long top = 0xffffd000 >> UM_KERN_PAGE_SHIFT;
-        unsigned long test, original;
-
-        printf("Locating the bottom of the address space ... ");
-        fflush(stdout);
-
-        /*
-         * We're going to be longjmping out of the signal handler, so
-         * SA_DEFER needs to be set.
-         */
-        sa.sa_handler = segfault;
-        sigemptyset(&sa.sa_mask);
-        sa.sa_flags = SA_NODEFER;
-        if (sigaction(SIGSEGV, &sa, &old)) {
-                perror("os_get_top_address");
-                exit(1);
-        }
-
-        /* Manually scan the address space, bottom-up, until we find
-         * the first valid page (or run out of them).
-         */
-        for (bottom = 0; bottom < top; bottom++) {
-                if (page_ok(bottom))
-                        break;
-        }
-
-        /* If we've got this far, we ran out of pages. */
-        if (bottom == top) {
-                fprintf(stderr, "Unable to determine bottom of address "
-                        "space.\n");
-                exit(1);
-        }
-
-        printf("0x%x\n", bottom << UM_KERN_PAGE_SHIFT);
-        printf("Locating the top of the address space ... ");
-        fflush(stdout);
-
-        original = bottom;
-
-        /* This could happen with a 4G/4G split */
-        if (page_ok(top))
-                goto out;
-
-        do {
-                test = bottom + (top - bottom) / 2;
-                if (page_ok(test))
-                        bottom = test;
-                else
-                        top = test;
-        } while (top - bottom > 1);
-
-out:
-        /* Restore the old SIGSEGV handling */
-        if (sigaction(SIGSEGV, &old, NULL)) {
-                perror("os_get_top_address");
-                exit(1);
-        }
-        top <<= UM_KERN_PAGE_SHIFT;
-        printf("0x%x\n", top);
-
-        return top;
-}
diff --git a/arch/um/os-Linux/sys-i386/tls.c b/arch/um/os-Linux/sys-i386/tls.c
deleted file mode 100644
index 32ed41ec1a3..00000000000
--- a/arch/um/os-Linux/sys-i386/tls.c
+++ /dev/null
@@ -1,36 +0,0 @@
-#include <errno.h>
-#include <linux/unistd.h>
-
-#include <sys/syscall.h>
-#include <unistd.h>
-
-#include "sysdep/tls.h"
-#include "user.h"
-
-/* Checks whether host supports TLS, and sets *tls_min according to the value
- * valid on the host.
- * i386 host have it == 6; x86_64 host have it == 12, for i386 emulation. */
-void check_host_supports_tls(int *supports_tls, int *tls_min) {
-        /* Values for x86 and x86_64.*/
-        int val[] = {GDT_ENTRY_TLS_MIN_I386, GDT_ENTRY_TLS_MIN_X86_64};
-        int i;
-
-        for (i = 0; i < ARRAY_SIZE(val); i++) {
-                user_desc_t info;
-                info.entry_number = val[i];
-
-                if (syscall(__NR_get_thread_area, &info) == 0) {
-                        *tls_min = val[i];
-                        *supports_tls = 1;
-                        return;
-                } else {
-                        if (errno == EINVAL)
-                                continue;
-                        else if (errno == ENOSYS)
-                                *supports_tls = 0;
-                                return;
-                }
-        }
-
-        *supports_tls = 0;
-}
diff --git a/arch/um/os-Linux/sys-x86_64/Makefile b/arch/um/os-Linux/sys-x86_64/Makefile
deleted file mode 100644
index a44a47f8f57..00000000000
--- a/arch/um/os-Linux/sys-x86_64/Makefile
+++ /dev/null
@@ -1,10 +0,0 @@
-#
-# Copyright (C) 2000 - 2007 Jeff Dike (jdike@{addtoit,linux.intel}.com)
-# Licensed under the GPL
-#
-
-obj-y = registers.o prctl.o signal.o task_size.o
-
-USER_OBJS := $(obj-y)
-
-include arch/um/scripts/Makefile.rules
diff --git a/arch/um/os-Linux/sys-x86_64/prctl.c b/arch/um/os-Linux/sys-x86_64/prctl.c
deleted file mode 100644
index 9d34eddb517..00000000000
--- a/arch/um/os-Linux/sys-x86_64/prctl.c
+++ /dev/null
@@ -1,12 +0,0 @@
-/*
- * Copyright (C) 2007 Jeff Dike (jdike@{addtoit.com,linux.intel.com})
- * Licensed under the GPL
- */
-
-#include <sys/ptrace.h>
-#include <linux/ptrace.h>
-
-int os_arch_prctl(int pid, int code, unsigned long *addr)
-{
-        return ptrace(PTRACE_ARCH_PRCTL, pid, (unsigned long) addr, code);
-}
diff --git a/arch/um/os-Linux/sys-x86_64/registers.c b/arch/um/os-Linux/sys-x86_64/registers.c
deleted file mode 100644
index 594d97ad02b..00000000000
--- a/arch/um/os-Linux/sys-x86_64/registers.c
+++ /dev/null
@@ -1,52 +0,0 @@
-/*
- * Copyright (C) 2006 - 2007 Jeff Dike (jdike@{addtoit,linux.intel}.com)
- * Licensed under the GPL
- */
-
-#include <errno.h>
-#include <sys/ptrace.h>
-#define __FRAME_OFFSETS
-#include <asm/ptrace.h>
-#include "kern_constants.h"
-#include "longjmp.h"
-#include "user.h"
-
-int save_fp_registers(int pid, unsigned long *fp_regs)
-{
-        if (ptrace(PTRACE_GETFPREGS, pid, 0, fp_regs) < 0)
-                return -errno;
-        return 0;
-}
-
-int restore_fp_registers(int pid, unsigned long *fp_regs)
-{
-        if (ptrace(PTRACE_SETFPREGS, pid, 0, fp_regs) < 0)
-                return -errno;
-        return 0;
-}
-
-unsigned long get_thread_reg(int reg, jmp_buf *buf)
-{
-        switch (reg) {
-        case RIP:
-                return buf[0]->__rip;
-        case RSP:
-                return buf[0]->__rsp;
-        case RBP:
-                return buf[0]->__rbp;
-        default:
-                printk(UM_KERN_ERR "get_thread_regs - unknown register %d\n",
-                       reg);
-                return 0;
-        }
-}
-
-int get_fp_registers(int pid, unsigned long *regs)
-{
-        return save_fp_registers(pid, regs);
-}
-
-int put_fp_registers(int pid, unsigned long *regs)
-{
-        return restore_fp_registers(pid, regs);
-}
diff --git a/arch/um/os-Linux/sys-x86_64/signal.c b/arch/um/os-Linux/sys-x86_64/signal.c
deleted file mode 100644
index 82a388822cd..00000000000
--- a/arch/um/os-Linux/sys-x86_64/signal.c
+++ /dev/null
@@ -1,16 +0,0 @@
-/*
- * Copyright (C) 2006 Jeff Dike (jdike@{addtoit,linux.intel}.com)
- * Licensed under the GPL
- */
-
-#include <signal.h>
-
-extern void handle_signal(int sig, struct sigcontext *sc);
-
-void hard_handler(int sig)
-{
-        struct ucontext *uc;
-        asm("movq %%rdx, %0" : "=r" (uc));
-
-        handle_signal(sig, (struct sigcontext *) &uc->uc_mcontext);
-}
diff --git a/arch/um/os-Linux/sys-x86_64/task_size.c b/arch/um/os-Linux/sys-x86_64/task_size.c
deleted file mode 100644
index 26a0dd1f349..00000000000
--- a/arch/um/os-Linux/sys-x86_64/task_size.c
+++ /dev/null
@@ -1,5 +0,0 @@
-unsigned long os_get_top_address(unsigned long shift)
-{
-        /* The old value of CONFIG_TOP_ADDR */
-        return 0x7fc0000000;
-}
diff --git a/arch/um/os-Linux/time.c b/arch/um/os-Linux/time.c
index 6e3359d6a83..910499d76a6 100644
--- a/arch/um/os-Linux/time.c
+++ b/arch/um/os-Linux/time.c
@@ -8,11 +8,9 @@
 #include <signal.h>
 #include <time.h>
 #include <sys/time.h>
-#include "kern_constants.h"
 #include "kern_util.h"
 #include "os.h"
-#include "process.h"
-#include "user.h"
+#include "internal.h"
 
 int set_interval(void)
 {
diff --git a/arch/um/os-Linux/tls.c b/arch/um/os-Linux/tls.c
deleted file mode 100644
index 73277801ef1..00000000000
--- a/arch/um/os-Linux/tls.c
+++ /dev/null
@@ -1,35 +0,0 @@
-#include <errno.h>
-#include <sys/ptrace.h>
-#include "sysdep/tls.h"
-
-/* TLS support - we basically rely on the host's one.*/
-
-#ifndef PTRACE_GET_THREAD_AREA
-#define PTRACE_GET_THREAD_AREA 25
-#endif
-
-#ifndef PTRACE_SET_THREAD_AREA
-#define PTRACE_SET_THREAD_AREA 26
-#endif
-
-int os_set_thread_area(user_desc_t *info, int pid)
-{
-        int ret;
-
-        ret = ptrace(PTRACE_SET_THREAD_AREA, pid, info->entry_number,
-                     (unsigned long) info);
-        if (ret < 0)
-                ret = -errno;
-        return ret;
-}
-
-int os_get_thread_area(user_desc_t *info, int pid)
-{
-        int ret;
-
-        ret = ptrace(PTRACE_GET_THREAD_AREA, pid, info->entry_number,
-                     (unsigned long) info);
-        if (ret < 0)
-                ret = -errno;
-        return ret;
-}
diff --git a/arch/um/os-Linux/tty.c b/arch/um/os-Linux/tty.c
index b09ff66a77e..dd12b99dcb5 100644
--- a/arch/um/os-Linux/tty.c
+++ b/arch/um/os-Linux/tty.c
@@ -7,10 +7,8 @@
 #include <unistd.h>
 #include <errno.h>
 #include <fcntl.h>
-#include "kern_constants.h"
 #include "kern_util.h"
 #include "os.h"
-#include "user.h"
 
 struct grantpt_info {
         int fd;
diff --git a/arch/um/os-Linux/uaccess.c b/arch/um/os-Linux/uaccess.c
deleted file mode 100644
index 087ed74ffca..00000000000
--- a/arch/um/os-Linux/uaccess.c
+++ /dev/null
@@ -1,32 +0,0 @@
-/*
- * Copyright (C) 2001 Chris Emerson (cemerson@chiark.greenend.org.uk)
- * Copyright (C) 2001 - 2007 Jeff Dike (jdike@{addtoit,linux.intel}.com)
- * Licensed under the GPL
- */
-
-#include <stddef.h>
-#include "longjmp.h"
-
-unsigned long __do_user_copy(void *to, const void *from, int n,
-                             void **fault_addr, jmp_buf **fault_catcher,
-                             void (*op)(void *to, const void *from,
-                                        int n), int *faulted_out)
-{
-        unsigned long *faddrp = (unsigned long *) fault_addr, ret;
-
-        jmp_buf jbuf;
-        *fault_catcher = &jbuf;
-        if (UML_SETJMP(&jbuf) == 0) {
-                (*op)(to, from, n);
-                ret = 0;
-                *faulted_out = 0;
-        }
-        else {
-                ret = *faddrp;
-                *faulted_out = 1;
-        }
-        *fault_addr = NULL;
-        *fault_catcher = NULL;
-        return ret;
-}
-
diff --git a/arch/um/os-Linux/umid.c b/arch/um/os-Linux/umid.c
index a27defb8188..4832eb519f8 100644
--- a/arch/um/os-Linux/umid.c
+++ b/arch/um/os-Linux/umid.c
@@ -13,9 +13,7 @@
 #include <unistd.h>
 #include <sys/stat.h>
 #include "init.h"
-#include "kern_constants.h"
 #include "os.h"
-#include "user.h"
 
 #define UML_DIR "~/.uml/"
 
diff --git a/arch/um/os-Linux/util.c b/arch/um/os-Linux/util.c
index 5803b188767..9e3b43bb84c 100644
--- a/arch/um/os-Linux/util.c
+++ b/arch/um/os-Linux/util.c
@@ -13,9 +13,7 @@
 #include <wait.h>
 #include <sys/mman.h>
 #include <sys/utsname.h>
-#include "kern_constants.h"
 #include "os.h"
-#include "user.h"
 
 void stack_protections(unsigned long address)
 {