Merge branch 'merge'

24 files changed, 264 insertions, 425 deletions

diff --git a/arch/um/kernel/Makefile b/arch/um/kernel/Makefile
index fe08971b64cf..a2d93065b2d0 100644
--- a/arch/um/kernel/Makefile
+++ b/arch/um/kernel/Makefile
@@ -6,16 +6,14 @@
 extra-y := vmlinux.lds
 clean-files :=
 
-obj-y = config.o exec_kern.o exitcode.o \
-        init_task.o irq.o ksyms.o mem.o physmem.o \
-        process_kern.o ptrace.o reboot.o resource.o sigio_kern.o \
-        signal_kern.o smp.o syscall_kern.o sysrq.o \
-        time_kern.o tlb.o trap_kern.o uaccess.o um_arch.o umid.o
+obj-y = config.o exec.o exitcode.o init_task.o irq.o ksyms.o mem.o \
+        physmem.o process_kern.o ptrace.o reboot.o resource.o sigio.o \
+        signal.o smp.o syscall.o sysrq.o time.o tlb.o trap.o uaccess.o \
+        um_arch.o umid.o
 
 obj-$(CONFIG_BLK_DEV_INITRD) += initrd.o
 obj-$(CONFIG_GPROF)     += gprof_syms.o
 obj-$(CONFIG_GCOV)      += gmon_syms.o
-obj-$(CONFIG_SYSCALL_DEBUG) += syscall.o
 
 obj-$(CONFIG_MODE_TT) += tt/
 obj-$(CONFIG_MODE_SKAS) += skas/
diff --git a/arch/um/kernel/dyn.lds.S b/arch/um/kernel/dyn.lds.S
index 2517ecb8bf27..68ed24df5c8f 100644
--- a/arch/um/kernel/dyn.lds.S
+++ b/arch/um/kernel/dyn.lds.S
@@ -26,6 +26,7 @@ SECTIONS
 
   /* Read-only sections, merged into text segment: */
   .hash           : { *(.hash) }
+  .gnu.hash       : { *(.gnu.hash) }
   .dynsym         : { *(.dynsym) }
   .dynstr         : { *(.dynstr) }
   .gnu.version    : { *(.gnu.version) }
diff --git a/arch/um/kernel/exec_kern.c b/arch/um/kernel/exec.c
index c0cb627bf594..fc38a6d5906d 100644
--- a/arch/um/kernel/exec_kern.c
+++ b/arch/um/kernel/exec.c
@@ -1,4 +1,4 @@
-/* 
+/*
  * Copyright (C) 2000, 2001 Jeff Dike (jdike@karaya.com)
  * Licensed under the GPL
  */
@@ -31,18 +31,27 @@ void start_thread(struct pt_regs *regs, unsigned long eip, unsigned long esp)
         CHOOSE_MODE_PROC(start_thread_tt, start_thread_skas, regs, eip, esp);
 }
 
+#ifdef CONFIG_TTY_LOG
+extern void log_exec(char **argv, void *tty);
+#endif
+
 static long execve1(char *file, char __user * __user *argv,
                     char __user *__user *env)
 {
         long error;
 
 #ifdef CONFIG_TTY_LOG
-        log_exec(argv, current->tty);
+        task_lock(current);
+        log_exec(argv, current->signal->tty);
+        task_unlock(current);
 #endif
         error = do_execve(file, argv, env, &current->thread.regs);
         if (error == 0){
                 task_lock(current);
                 current->ptrace &= ~PT_DTRACE;
+#ifdef SUBARCH_EXECVE1
+                SUBARCH_EXECVE1(&current->thread.regs.regs);
+#endif
                 task_unlock(current);
                 set_cmdline(current_cmd());
         }
diff --git a/arch/um/kernel/irq.c b/arch/um/kernel/irq.c
index bfd0bdc8cd40..589c69a75043 100644
--- a/arch/um/kernel/irq.c
+++ b/arch/um/kernel/irq.c
@@ -110,18 +110,7 @@ void sigio_handler(int sig, union uml_pt_regs *regs)
         free_irqs();
 }
 
-static void maybe_sigio_broken(int fd, int type)
-{
-        if (os_isatty(fd)) {
-                if ((type == IRQ_WRITE) && !pty_output_sigio) {
-                        write_sigio_workaround();
-                        add_sigio_fd(fd, 0);
-                } else if ((type == IRQ_READ) && !pty_close_sigio) {
-                        write_sigio_workaround();
-                        add_sigio_fd(fd, 1);
-                }
-        }
-}
+static DEFINE_SPINLOCK(irq_lock);
 
 int activate_fd(int irq, int fd, int type, void *dev_id)
 {
@@ -166,7 +155,7 @@ int activate_fd(int irq, int fd, int type, void *dev_id)
          * this is called only from process context, and can be locked with
          * a semaphore.
          */
-        flags = irq_lock();
+        spin_lock_irqsave(&irq_lock, flags);
         for (irq_fd = active_fds; irq_fd != NULL; irq_fd = irq_fd->next) {
                 if ((irq_fd->fd == fd) && (irq_fd->type == type)) {
                         printk("Registering fd %d twice\n", fd);
@@ -199,7 +188,7 @@ int activate_fd(int irq, int fd, int type, void *dev_id)
                  * so we will not be able to put new pollfd struct to pollfds
                  * then we free the buffer tmp_fds and try again.
                  */
-                irq_unlock(flags);
+                spin_unlock_irqrestore(&irq_lock, flags);
                 kfree(tmp_pfd);
                 tmp_pfd = NULL;
 
@@ -207,24 +196,24 @@ int activate_fd(int irq, int fd, int type, void *dev_id)
                 if (tmp_pfd == NULL)
                         goto out_kfree;
 
-                flags = irq_lock();
+                spin_lock_irqsave(&irq_lock, flags);
         }
         /*-------------*/
 
         *last_irq_ptr = new_fd;
         last_irq_ptr = &new_fd->next;
 
-        irq_unlock(flags);
+        spin_unlock_irqrestore(&irq_lock, flags);
 
         /* This calls activate_fd, so it has to be outside the critical
          * section.
          */
-        maybe_sigio_broken(fd, type);
+        maybe_sigio_broken(fd, (type == IRQ_READ));
 
         return(0);
 
  out_unlock:
-        irq_unlock(flags);
+        spin_unlock_irqrestore(&irq_lock, flags);
  out_kfree:
         kfree(new_fd);
  out:
@@ -235,9 +224,9 @@ static void free_irq_by_cb(int (*test)(struct irq_fd *, void *), void *arg)
 {
         unsigned long flags;
 
-        flags = irq_lock();
+        spin_lock_irqsave(&irq_lock, flags);
         os_free_irq_by_cb(test, arg, active_fds, &last_irq_ptr);
-        irq_unlock(flags);
+        spin_unlock_irqrestore(&irq_lock, flags);
 }
 
 struct irq_and_dev {
@@ -304,19 +293,19 @@ void reactivate_fd(int fd, int irqnum)
         unsigned long flags;
         int i;
 
-        flags = irq_lock();
+        spin_lock_irqsave(&irq_lock, flags);
         irq = find_irq_by_fd(fd, irqnum, &i);
         if (irq == NULL) {
-                irq_unlock(flags);
+                spin_unlock_irqrestore(&irq_lock, flags);
                 return;
         }
         os_set_pollfd(i, irq->fd);
-        irq_unlock(flags);
+        spin_unlock_irqrestore(&irq_lock, flags);
 
         /* This calls activate_fd, so it has to be outside the critical
          * section.
          */
-        maybe_sigio_broken(fd, irq->type);
+        maybe_sigio_broken(fd, (irq->type == IRQ_READ));
 }
 
 void deactivate_fd(int fd, int irqnum)
@@ -325,13 +314,13 @@ void deactivate_fd(int fd, int irqnum)
         unsigned long flags;
         int i;
 
-        flags = irq_lock();
+        spin_lock_irqsave(&irq_lock, flags);
         irq = find_irq_by_fd(fd, irqnum, &i);
         if (irq == NULL)
                 goto out;
         os_set_pollfd(i, -1);
  out:
-        irq_unlock(flags);
+        spin_unlock_irqrestore(&irq_lock, flags);
 }
 
 int deactivate_all_fds(void)
@@ -350,13 +339,14 @@ int deactivate_all_fds(void)
         return 0;
 }
 
+#ifdef CONFIG_MODE_TT
 void forward_interrupts(int pid)
 {
         struct irq_fd *irq;
         unsigned long flags;
         int err;
 
-        flags = irq_lock();
+        spin_lock_irqsave(&irq_lock, flags);
         for (irq = active_fds; irq != NULL; irq = irq->next) {
                 err = os_set_owner(irq->fd, pid);
                 if (err < 0) {
@@ -369,8 +359,9 @@ void forward_interrupts(int pid)
 
                 irq->pid = pid;
         }
-        irq_unlock(flags);
+        spin_unlock_irqrestore(&irq_lock, flags);
 }
+#endif
 
 /*
  * do_IRQ handles all normal device IRQ's (the special
@@ -403,21 +394,6 @@ int um_request_irq(unsigned int irq, int fd, int type,
 EXPORT_SYMBOL(um_request_irq);
 EXPORT_SYMBOL(reactivate_fd);
 
-static DEFINE_SPINLOCK(irq_spinlock);
-
-unsigned long irq_lock(void)
-{
-        unsigned long flags;
-
-        spin_lock_irqsave(&irq_spinlock, flags);
-        return flags;
-}
-
-void irq_unlock(unsigned long flags)
-{
-        spin_unlock_irqrestore(&irq_spinlock, flags);
-}
-
 /* hw_interrupt_type must define (startup || enable) &&
  * (shutdown || disable) && end */
 static void dummy(unsigned int irq)
diff --git a/arch/um/kernel/ksyms.c b/arch/um/kernel/ksyms.c
index 432cf0b97a13..c97045d6d89f 100644
--- a/arch/um/kernel/ksyms.c
+++ b/arch/um/kernel/ksyms.c
@@ -88,12 +88,6 @@ EXPORT_SYMBOL(dump_thread);
 EXPORT_SYMBOL(do_gettimeofday);
 EXPORT_SYMBOL(do_settimeofday);
 
-/* This is here because UML expands lseek to sys_lseek, not to a system
- * call instruction.
- */
-EXPORT_SYMBOL(sys_lseek);
-EXPORT_SYMBOL(sys_wait4);
-
 #ifdef CONFIG_SMP
 
 /* required for SMP */
diff --git a/arch/um/kernel/mem.c b/arch/um/kernel/mem.c
index 44e41a35f000..61280167c560 100644
--- a/arch/um/kernel/mem.c
+++ b/arch/um/kernel/mem.c
@@ -24,8 +24,6 @@
 #include "init.h"
 #include "kern_constants.h"
 
-extern char __binary_start;
-
 /* Changed during early boot */
 unsigned long *empty_zero_page = NULL;
 unsigned long *empty_bad_page = NULL;
@@ -65,8 +63,6 @@ static void setup_highmem(unsigned long highmem_start,
 
 void mem_init(void)
 {
-        unsigned long start;
-
         max_low_pfn = (high_physmem - uml_physmem) >> PAGE_SHIFT;
 
         /* clear the zero-page */
@@ -81,13 +77,6 @@ void mem_init(void)
         free_bootmem(__pa(brk_end), uml_reserved - brk_end);
         uml_reserved = brk_end;
 
-        /* Fill in any hole at the start of the binary */
-        start = (unsigned long) &__binary_start & PAGE_MASK;
-        if(uml_physmem != start){
-                map_memory(uml_physmem, __pa(uml_physmem), start - uml_physmem,
-                           1, 1, 0);
-        }
-
         /* this will put all low memory onto the freelists */
         totalram_pages = free_all_bootmem();
         totalhigh_pages = highmem >> PAGE_SHIFT;
diff --git a/arch/um/kernel/physmem.c b/arch/um/kernel/physmem.c
index 166cb09cae4c..abafa64b8727 100644
--- a/arch/um/kernel/physmem.c
+++ b/arch/um/kernel/physmem.c
@@ -317,7 +317,7 @@ void map_memory(unsigned long virt, unsigned long phys, unsigned long len,
         }
 }
 
-extern int __syscall_stub_start, __binary_start;
+extern int __syscall_stub_start;
 
 void setup_physmem(unsigned long start, unsigned long reserve_end,
                    unsigned long len, unsigned long long highmem)
diff --git a/arch/um/kernel/sigio_kern.c b/arch/um/kernel/sigio.c
index 51b677083948..0ad755ceb212 100644
--- a/arch/um/kernel/sigio_kern.c
+++ b/arch/um/kernel/sigio.c
@@ -31,7 +31,7 @@ int write_sigio_irq(int fd)
         int err;
 
         err = um_request_irq(SIGIO_WRITE_IRQ, fd, IRQ_READ, sigio_interrupt,
-                             IRQF_DISABLED | IRQF_SAMPLE_RANDOM, "write sigio",
+                             IRQF_DISABLED|IRQF_SAMPLE_RANDOM, "write sigio",
                              NULL);
         if(err){
                 printk("write_sigio_irq : um_request_irq failed, err = %d\n",
@@ -53,17 +53,3 @@ void sigio_unlock(void)
 {
         spin_unlock(&sigio_spinlock);
 }
-
-extern void sigio_cleanup(void);
-__uml_exitcall(sigio_cleanup);
-
-/*
- * 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/kernel/signal_kern.c b/arch/um/kernel/signal.c
index da17b7541e08..4aa9808ba264 100644
--- a/arch/um/kernel/signal_kern.c
+++ b/arch/um/kernel/signal.c
@@ -1,4 +1,4 @@
-/* 
+/*
  * Copyright (C) 2000, 2001, 2002 Jeff Dike (jdike@karaya.com)
  * Licensed under the GPL
  */
@@ -36,7 +36,7 @@ EXPORT_SYMBOL(unblock_signals);
 
 /*
  * OK, we're invoking a handler
- */     
+ */
 static int handle_signal(struct pt_regs *regs, unsigned long signr,
                          struct k_sigaction *ka, siginfo_t *info,
                          sigset_t *oldset)
@@ -88,7 +88,7 @@ static int handle_signal(struct pt_regs *regs, unsigned long signr,
                 force_sigsegv(signr, current);
         } else {
                 spin_lock_irq(&current->sighand->siglock);
-                sigorsets(&current->blocked, &current->blocked, 
+                sigorsets(&current->blocked, &current->blocked,
                           &ka->sa.sa_mask);
                  if(!(ka->sa.sa_flags & SA_NODEFER))
                         sigaddset(&current->blocked, signr);
@@ -136,7 +136,7 @@ static int kern_do_signal(struct pt_regs *regs)
                         PT_REGS_RESTART_SYSCALL(regs);
                         break;
                 case -ERESTART_RESTARTBLOCK:
-                        PT_REGS_SYSCALL_RET(regs) = __NR_restart_syscall;
+                        PT_REGS_ORIG_SYSCALL(regs) = __NR_restart_syscall;
                         PT_REGS_RESTART_SYSCALL(regs);
                         break;
                 }
@@ -146,7 +146,7 @@ static int kern_do_signal(struct pt_regs *regs)
          * you set a breakpoint on a system call instruction and singlestep
          * from it, the tracing thread used to PTRACE_SINGLESTEP the process
          * rather than PTRACE_SYSCALL it, allowing the system call to execute
-         * on the host.  The tracing thread will check this flag and 
+         * on the host.  The tracing thread will check this flag and
          * PTRACE_SYSCALL if necessary.
          */
         if(current->ptrace & PT_DTRACE)
diff --git a/arch/um/kernel/skas/mem.c b/arch/um/kernel/skas/mem.c
index 88ab96c609ce..27bbf54b1e52 100644
--- a/arch/um/kernel/skas/mem.c
+++ b/arch/um/kernel/skas/mem.c
@@ -9,31 +9,19 @@
 #include "mem_user.h"
 #include "skas.h"
 
-unsigned long set_task_sizes_skas(int arg, unsigned long *host_size_out, 
-                                  unsigned long *task_size_out)
+unsigned long set_task_sizes_skas(unsigned long *task_size_out)
 {
         /* Round up to the nearest 4M */
-        unsigned long top = ROUND_4M((unsigned long) &arg);
+        unsigned long host_task_size = ROUND_4M((unsigned long)
+                                                &host_task_size);
 
 #ifdef CONFIG_HOST_TASK_SIZE
-        *host_size_out = CONFIG_HOST_TASK_SIZE;
+        *host_size_out = ROUND_4M(CONFIG_HOST_TASK_SIZE);
         *task_size_out = CONFIG_HOST_TASK_SIZE;
 #else
-        *host_size_out = top;
         if (!skas_needs_stub)
-                *task_size_out = top;
+                *task_size_out = host_task_size;
         else *task_size_out = CONFIG_STUB_START & PGDIR_MASK;
 #endif
-        return(((unsigned long) set_task_sizes_skas) & ~0xffffff);
+        return host_task_size;
 }
-
-/*
- * 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/kernel/skas/process_kern.c b/arch/um/kernel/skas/process_kern.c
index 2135eaf98a93..55caeec8b257 100644
--- a/arch/um/kernel/skas/process_kern.c
+++ b/arch/um/kernel/skas/process_kern.c
@@ -177,7 +177,7 @@ int start_uml_skas(void)
         if(proc_mm)
                 userspace_pid[0] = start_userspace(0);
 
-        init_new_thread_signals(1);
+        init_new_thread_signals();
 
         init_task.thread.request.u.thread.proc = start_kernel_proc;
         init_task.thread.request.u.thread.arg = NULL;
diff --git a/arch/um/kernel/skas/syscall.c b/arch/um/kernel/skas/syscall.c
index 51fb94076fcf..0ae4eea21be4 100644
--- a/arch/um/kernel/skas/syscall.c
+++ b/arch/um/kernel/skas/syscall.c
@@ -18,11 +18,7 @@ void handle_syscall(union uml_pt_regs *r)
         struct pt_regs *regs = container_of(r, struct pt_regs, regs);
         long result;
         int syscall;
-#ifdef UML_CONFIG_SYSCALL_DEBUG
-        int index;
 
-        index = record_syscall_start(UPT_SYSCALL_NR(r));
-#endif
         syscall_trace(r, 0);
 
         current->thread.nsyscalls++;
@@ -44,7 +40,4 @@ void handle_syscall(union uml_pt_regs *r)
         REGS_SET_SYSCALL_RETURN(r->skas.regs, result);
 
         syscall_trace(r, 1);
-#ifdef UML_CONFIG_SYSCALL_DEBUG
-        record_syscall_end(index, result);
-#endif
 }
diff --git a/arch/um/kernel/syscall.c b/arch/um/kernel/syscall.c
index 1731d90e6850..48cf88dd02d4 100644
--- a/arch/um/kernel/syscall.c
+++ b/arch/um/kernel/syscall.c
@@ -1,36 +1,166 @@
 /*
- * Copyright (C) 2002 Jeff Dike (jdike@karaya.com)
+ * Copyright (C) 2000 - 2003 Jeff Dike (jdike@addtoit.com)
  * Licensed under the GPL
  */
 
+#include "linux/sched.h"
+#include "linux/file.h"
+#include "linux/smp_lock.h"
+#include "linux/mm.h"
+#include "linux/utsname.h"
+#include "linux/msg.h"
+#include "linux/shm.h"
+#include "linux/sys.h"
+#include "linux/syscalls.h"
+#include "linux/unistd.h"
+#include "linux/slab.h"
+#include "linux/utime.h"
+#include "asm/mman.h"
+#include "asm/uaccess.h"
 #include "kern_util.h"
-#include "syscall.h"
-#include "os.h"
+#include "user_util.h"
+#include "sysdep/syscalls.h"
+#include "mode_kern.h"
+#include "choose-mode.h"
 
-struct {
-        int syscall;
-        int pid;
-        long result;
-        unsigned long long start;
-        unsigned long long end;
-} syscall_record[1024];
+/*  Unlocked, I don't care if this is a bit off */
+int nsyscalls = 0;
 
-int record_syscall_start(int syscall)
+long sys_fork(void)
 {
-        int max, index;
+        long ret;
 
-        max = sizeof(syscall_record)/sizeof(syscall_record[0]);
-        index = next_syscall_index(max);
+        current->thread.forking = 1;
+        ret = do_fork(SIGCHLD, UPT_SP(&current->thread.regs.regs),
+                      &current->thread.regs, 0, NULL, NULL);
+        current->thread.forking = 0;
+        return(ret);
+}
+
+long sys_vfork(void)
+{
+        long ret;
+
+        current->thread.forking = 1;
+        ret = do_fork(CLONE_VFORK | CLONE_VM | SIGCHLD,
+                      UPT_SP(&current->thread.regs.regs),
+                      &current->thread.regs, 0, NULL, NULL);
+        current->thread.forking = 0;
+        return(ret);
+}
+
+/* common code for old and new mmaps */
+long sys_mmap2(unsigned long addr, unsigned long len,
+               unsigned long prot, unsigned long flags,
+               unsigned long fd, unsigned long pgoff)
+{
+        long error = -EBADF;
+        struct file * file = NULL;
+
+        flags &= ~(MAP_EXECUTABLE | MAP_DENYWRITE);
+        if (!(flags & MAP_ANONYMOUS)) {
+                file = fget(fd);
+                if (!file)
+                        goto out;
+        }
+
+        down_write(&current->mm->mmap_sem);
+        error = do_mmap_pgoff(file, addr, len, prot, flags, pgoff);
+        up_write(&current->mm->mmap_sem);
+
+        if (file)
+                fput(file);
+ out:
+        return error;
+}
+
+long old_mmap(unsigned long addr, unsigned long len,
+              unsigned long prot, unsigned long flags,
+              unsigned long fd, unsigned long offset)
+{
+        long err = -EINVAL;
+        if (offset & ~PAGE_MASK)
+                goto out;
+
+        err = sys_mmap2(addr, len, prot, flags, fd, offset >> PAGE_SHIFT);
+ out:
+        return err;
+}
+/*
+ * sys_pipe() is the normal C calling standard for creating
+ * a pipe. It's not the way unix traditionally does this, though.
+ */
+long sys_pipe(unsigned long __user * fildes)
+{
+        int fd[2];
+        long error;
+
+        error = do_pipe(fd);
+        if (!error) {
+                if (copy_to_user(fildes, fd, sizeof(fd)))
+                        error = -EFAULT;
+        }
+        return error;
+}
 
-        syscall_record[index].syscall = syscall;
-        syscall_record[index].pid = current_pid();
-        syscall_record[index].result = 0xdeadbeef;
-        syscall_record[index].start = os_nsecs();
-        return(index);
+
+long sys_uname(struct old_utsname __user * name)
+{
+        long err;
+        if (!name)
+                return -EFAULT;
+        down_read(&uts_sem);
+        err = copy_to_user(name, &system_utsname, sizeof (*name));
+        up_read(&uts_sem);
+        return err?-EFAULT:0;
 }
 
-void record_syscall_end(int index, long result)
+long sys_olduname(struct oldold_utsname __user * name)
 {
-        syscall_record[index].result = result;
-        syscall_record[index].end = os_nsecs();
+        long error;
+
+        if (!name)
+                return -EFAULT;
+        if (!access_ok(VERIFY_WRITE,name,sizeof(struct oldold_utsname)))
+                return -EFAULT;
+
+        down_read(&uts_sem);
+
+        error = __copy_to_user(&name->sysname,&system_utsname.sysname,
+                               __OLD_UTS_LEN);
+        error |= __put_user(0,name->sysname+__OLD_UTS_LEN);
+        error |= __copy_to_user(&name->nodename,&system_utsname.nodename,
+                                __OLD_UTS_LEN);
+        error |= __put_user(0,name->nodename+__OLD_UTS_LEN);
+        error |= __copy_to_user(&name->release,&system_utsname.release,
+                                __OLD_UTS_LEN);
+        error |= __put_user(0,name->release+__OLD_UTS_LEN);
+        error |= __copy_to_user(&name->version,&system_utsname.version,
+                                __OLD_UTS_LEN);
+        error |= __put_user(0,name->version+__OLD_UTS_LEN);
+        error |= __copy_to_user(&name->machine,&system_utsname.machine,
+                                __OLD_UTS_LEN);
+        error |= __put_user(0,name->machine+__OLD_UTS_LEN);
+
+        up_read(&uts_sem);
+
+        error = error ? -EFAULT : 0;
+
+        return error;
+}
+
+DEFINE_SPINLOCK(syscall_lock);
+
+static int syscall_index = 0;
+
+int next_syscall_index(int limit)
+{
+        int ret;
+
+        spin_lock(&syscall_lock);
+        ret = syscall_index;
+        if(++syscall_index == limit)
+                syscall_index = 0;
+        spin_unlock(&syscall_lock);
+        return(ret);
 }
diff --git a/arch/um/kernel/syscall_kern.c b/arch/um/kernel/syscall_kern.c
deleted file mode 100644
index 37d3978337d8..000000000000
--- a/arch/um/kernel/syscall_kern.c
+++ /dev/null
@@ -1,166 +0,0 @@
-/* 
- * Copyright (C) 2000 - 2003 Jeff Dike (jdike@addtoit.com)
- * Licensed under the GPL
- */
-
-#include "linux/sched.h"
-#include "linux/file.h"
-#include "linux/smp_lock.h"
-#include "linux/mm.h"
-#include "linux/utsname.h"
-#include "linux/msg.h"
-#include "linux/shm.h"
-#include "linux/sys.h"
-#include "linux/syscalls.h"
-#include "linux/unistd.h"
-#include "linux/slab.h"
-#include "linux/utime.h"
-#include "asm/mman.h"
-#include "asm/uaccess.h"
-#include "kern_util.h"
-#include "user_util.h"
-#include "sysdep/syscalls.h"
-#include "mode_kern.h"
-#include "choose-mode.h"
-
-/*  Unlocked, I don't care if this is a bit off */
-int nsyscalls = 0;
-
-long sys_fork(void)
-{
-        long ret;
-
-        current->thread.forking = 1;
-        ret = do_fork(SIGCHLD, UPT_SP(&current->thread.regs.regs),
-                      &current->thread.regs, 0, NULL, NULL);
-        current->thread.forking = 0;
-        return(ret);
-}
-
-long sys_vfork(void)
-{
-        long ret;
-
-        current->thread.forking = 1;
-        ret = do_fork(CLONE_VFORK | CLONE_VM | SIGCHLD,
-                      UPT_SP(&current->thread.regs.regs),
-                      &current->thread.regs, 0, NULL, NULL);
-        current->thread.forking = 0;
-        return(ret);
-}
-
-/* common code for old and new mmaps */
-long sys_mmap2(unsigned long addr, unsigned long len,
-               unsigned long prot, unsigned long flags,
-               unsigned long fd, unsigned long pgoff)
-{
-        long error = -EBADF;
-        struct file * file = NULL;
-
-        flags &= ~(MAP_EXECUTABLE | MAP_DENYWRITE);
-        if (!(flags & MAP_ANONYMOUS)) {
-                file = fget(fd);
-                if (!file)
-                        goto out;
-        }
-
-        down_write(&current->mm->mmap_sem);
-        error = do_mmap_pgoff(file, addr, len, prot, flags, pgoff);
-        up_write(&current->mm->mmap_sem);
-
-        if (file)
-                fput(file);
- out:
-        return error;
-}
-
-long old_mmap(unsigned long addr, unsigned long len,
-              unsigned long prot, unsigned long flags,
-              unsigned long fd, unsigned long offset)
-{
-        long err = -EINVAL;
-        if (offset & ~PAGE_MASK)
-                goto out;
-
-        err = sys_mmap2(addr, len, prot, flags, fd, offset >> PAGE_SHIFT);
- out:
-        return err;
-}
-/*
- * sys_pipe() is the normal C calling standard for creating
- * a pipe. It's not the way unix traditionally does this, though.
- */
-long sys_pipe(unsigned long __user * fildes)
-{
-        int fd[2];
-        long error;
-
-        error = do_pipe(fd);
-        if (!error) {
-                if (copy_to_user(fildes, fd, sizeof(fd)))
-                        error = -EFAULT;
-        }
-        return error;
-}
-
-
-long sys_uname(struct old_utsname __user * name)
-{
-        long err;
-        if (!name)
-                return -EFAULT;
-        down_read(&uts_sem);
-        err=copy_to_user(name, &system_utsname, sizeof (*name));
-        up_read(&uts_sem);
-        return err?-EFAULT:0;
-}
-
-long sys_olduname(struct oldold_utsname __user * name)
-{
-        long error;
-
-        if (!name)
-                return -EFAULT;
-        if (!access_ok(VERIFY_WRITE,name,sizeof(struct oldold_utsname)))
-                return -EFAULT;
-  
-        down_read(&uts_sem);
-        
-        error = __copy_to_user(&name->sysname,&system_utsname.sysname,
-                               __OLD_UTS_LEN);
-        error |= __put_user(0,name->sysname+__OLD_UTS_LEN);
-        error |= __copy_to_user(&name->nodename,&system_utsname.nodename,
-                                __OLD_UTS_LEN);
-        error |= __put_user(0,name->nodename+__OLD_UTS_LEN);
-        error |= __copy_to_user(&name->release,&system_utsname.release,
-                                __OLD_UTS_LEN);
-        error |= __put_user(0,name->release+__OLD_UTS_LEN);
-        error |= __copy_to_user(&name->version,&system_utsname.version,
-                                __OLD_UTS_LEN);
-        error |= __put_user(0,name->version+__OLD_UTS_LEN);
-        error |= __copy_to_user(&name->machine,&system_utsname.machine,
-                                __OLD_UTS_LEN);
-        error |= __put_user(0,name->machine+__OLD_UTS_LEN);
-        
-        up_read(&uts_sem);
-        
-        error = error ? -EFAULT : 0;
-
-        return error;
-}
-
-DEFINE_SPINLOCK(syscall_lock);
-
-static int syscall_index = 0;
-
-int next_syscall_index(int limit)
-{
-        int ret;
-
-        spin_lock(&syscall_lock);
-        ret = syscall_index;
-        if(++syscall_index == limit)
-                syscall_index = 0;
-        spin_unlock(&syscall_lock);
-        return(ret);
-}
diff --git a/arch/um/kernel/time_kern.c b/arch/um/kernel/time.c
index d7e044b5e5ee..552ca1cb9847 100644
--- a/arch/um/kernel/time_kern.c
+++ b/arch/um/kernel/time.c
@@ -38,7 +38,6 @@ unsigned long long sched_clock(void)
 /* Changed at early boot */
 int timer_irq_inited = 0;
 
-static int first_tick;
 static unsigned long long prev_nsecs;
 #ifdef CONFIG_UML_REAL_TIME_CLOCK
 static long long delta;                 /* Deviation per interval */
@@ -48,15 +47,8 @@ void timer_irq(union uml_pt_regs *regs)
 {
         unsigned long long ticks = 0;
 
-        if(!timer_irq_inited){
-                /* This is to ensure that ticks don't pile up when
-                 * the timer handler is suspended */
-                first_tick = 0;
-                return;
-        }
-
-        if(first_tick){
 #ifdef CONFIG_UML_REAL_TIME_CLOCK
+        if(prev_nsecs){
                 /* We've had 1 tick */
                 unsigned long long nsecs = os_nsecs();
 
@@ -69,44 +61,17 @@ void timer_irq(union uml_pt_regs *regs)
 
                 ticks += (delta * HZ) / BILLION;
                 delta -= (ticks * BILLION) / HZ;
+        }
+        else prev_nsecs = os_nsecs();
 #else
-                ticks = 1;
+        ticks = 1;
 #endif
-        }
-        else {
-                prev_nsecs = os_nsecs();
-                first_tick = 1;
-        }
-
         while(ticks > 0){
                 do_IRQ(TIMER_IRQ, regs);
                 ticks--;
         }
 }
 
-
-void time_init_kern(void)
-{
-        long long nsecs;
-
-        nsecs = os_nsecs();
-        set_normalized_timespec(&wall_to_monotonic, -nsecs / BILLION,
-                                -nsecs % BILLION);
-}
-
-void do_boot_timer_handler(struct sigcontext * sc)
-{
-        unsigned long flags;
-        struct pt_regs regs;
-
-        CHOOSE_MODE((void) (UPT_SC(&regs.regs) = sc),
-                    (void) (regs.regs.skas.is_user = 0));
-
-        write_seqlock_irqsave(&xtime_lock, flags);
-        do_timer(&regs);
-        write_sequnlock_irqrestore(&xtime_lock, flags);
-}
-
 static DEFINE_SPINLOCK(timer_spinlock);
 
 static unsigned long long local_offset = 0;
@@ -142,6 +107,32 @@ irqreturn_t um_timer(int irq, void *dev, struct pt_regs *regs)
         return IRQ_HANDLED;
 }
 
+static void register_timer(void)
+{
+        int err;
+
+        err = request_irq(TIMER_IRQ, um_timer, IRQF_DISABLED, "timer", NULL);
+        if(err != 0)
+                printk(KERN_ERR "timer_init : request_irq failed - "
+                       "errno = %d\n", -err);
+
+        timer_irq_inited = 1;
+
+        user_time_init();
+}
+
+extern void (*late_time_init)(void);
+
+void time_init(void)
+{
+        long long nsecs;
+
+        nsecs = os_nsecs();
+        set_normalized_timespec(&wall_to_monotonic, -nsecs / BILLION,
+                                -nsecs % BILLION);
+        late_time_init = register_timer;
+}
+
 void do_gettimeofday(struct timeval *tv)
 {
         unsigned long long nsecs = get_time();
@@ -189,18 +180,3 @@ void timer_handler(int sig, union uml_pt_regs *regs)
         if(current_thread->cpu == 0)
                 timer_irq(regs);
 }
-
-int __init timer_init(void)
-{
-        int err;
-
-        user_time_init();
-        err = request_irq(TIMER_IRQ, um_timer, IRQF_DISABLED, "timer", NULL);
-        if(err != 0)
-                printk(KERN_ERR "timer_init : request_irq failed - "
-                       "errno = %d\n", -err);
-        timer_irq_inited = 1;
-        return(0);
-}
-
-arch_initcall(timer_init);
diff --git a/arch/um/kernel/trap_kern.c b/arch/um/kernel/trap.c
index 02f6d4d8dc3a..ac70fa5a2e2a 100644
--- a/arch/um/kernel/trap_kern.c
+++ b/arch/um/kernel/trap.c
@@ -35,7 +35,7 @@
 #include "os.h"
 
 /* Note this is constrained to return 0, -EFAULT, -EACCESS, -ENOMEM by segv(). */
-int handle_page_fault(unsigned long address, unsigned long ip, 
+int handle_page_fault(unsigned long address, unsigned long ip,
                       int is_write, int is_user, int *code_out)
 {
         struct mm_struct *mm = current->mm;
@@ -55,20 +55,20 @@ int handle_page_fault(unsigned long address, unsigned long ip,
 
         down_read(&mm->mmap_sem);
         vma = find_vma(mm, address);
-        if(!vma) 
+        if(!vma)
                 goto out;
-        else if(vma->vm_start <= address) 
+        else if(vma->vm_start <= address)
                 goto good_area;
-        else if(!(vma->vm_flags & VM_GROWSDOWN)) 
+        else if(!(vma->vm_flags & VM_GROWSDOWN))
                 goto out;
         else if(is_user && !ARCH_IS_STACKGROW(address))
                 goto out;
-        else if(expand_stack(vma, address)) 
+        else if(expand_stack(vma, address))
                 goto out;
 
 good_area:
         *code_out = SEGV_ACCERR;
-        if(is_write && !(vma->vm_flags & VM_WRITE)) 
+        if(is_write && !(vma->vm_flags & VM_WRITE))
                 goto out;
 
         /* Don't require VM_READ|VM_EXEC for write faults! */
@@ -184,14 +184,14 @@ unsigned long segv(struct faultinfo fi, unsigned long ip, int is_user, void *sc)
         else if(catcher != NULL){
                 current->thread.fault_addr = (void *) address;
                 do_longjmp(catcher, 1);
-        } 
+        }
         else if(current->thread.fault_addr != NULL)
                 panic("fault_addr set but no fault catcher");
         else if(!is_user && arch_fixup(ip, sc))
                 return(0);
 
-        if(!is_user) 
-                panic("Kernel mode fault at addr 0x%lx, ip 0x%lx", 
+        if(!is_user)
+                panic("Kernel mode fault at addr 0x%lx, ip 0x%lx",
                       address, ip);
 
         if (err == -EACCES) {
diff --git a/arch/um/kernel/tt/exec_kern.c b/arch/um/kernel/tt/exec_kern.c
index 5c1e4cc1c049..ad66df17d9d7 100644
--- a/arch/um/kernel/tt/exec_kern.c
+++ b/arch/um/kernel/tt/exec_kern.c
@@ -21,7 +21,7 @@
 static int exec_tramp(void *sig_stack)
 {
         init_new_thread_stack(sig_stack, NULL);
-        init_new_thread_signals(1);
+        init_new_thread_signals();
         os_stop_process(os_getpid());
         return(0);
 }
diff --git a/arch/um/kernel/tt/mem.c b/arch/um/kernel/tt/mem.c
index bcb8796c3cb1..84a23b14f770 100644
--- a/arch/um/kernel/tt/mem.c
+++ b/arch/um/kernel/tt/mem.c
@@ -24,22 +24,13 @@ void before_mem_tt(unsigned long brk_start)
 #define SIZE ((CONFIG_NEST_LEVEL + CONFIG_KERNEL_HALF_GIGS) * 0x20000000)
 #define START (CONFIG_TOP_ADDR - SIZE)
 
-unsigned long set_task_sizes_tt(int arg, unsigned long *host_size_out, 
-                                unsigned long *task_size_out)
+unsigned long set_task_sizes_tt(unsigned long *task_size_out)
 {
+        unsigned long host_task_size;
+
         /* Round up to the nearest 4M */
-        *host_size_out = ROUND_4M((unsigned long) &arg);
+        host_task_size = ROUND_4M((unsigned long) &host_task_size);
         *task_size_out = START;
-        return(START);
-}
 
-/*
- * 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:
- */
+        return host_task_size;
+}
diff --git a/arch/um/kernel/tt/process_kern.c b/arch/um/kernel/tt/process_kern.c
index 8368c2dbe635..1e86f0bfef72 100644
--- a/arch/um/kernel/tt/process_kern.c
+++ b/arch/um/kernel/tt/process_kern.c
@@ -142,7 +142,7 @@ static void new_thread_handler(int sig)
                 schedule_tail(current->thread.prev_sched);
         current->thread.prev_sched = NULL;
 
-        init_new_thread_signals(1);
+        init_new_thread_signals();
         enable_timer();
         free_page(current->thread.temp_stack);
         set_cmdline("(kernel thread)");
diff --git a/arch/um/kernel/tt/syscall_kern.c b/arch/um/kernel/tt/syscall_kern.c
index 3fda9a03c59a..293caa6d0c2d 100644
--- a/arch/um/kernel/tt/syscall_kern.c
+++ b/arch/um/kernel/tt/syscall_kern.c
@@ -21,18 +21,11 @@ void syscall_handler_tt(int sig, struct pt_regs *regs)
         void *sc;
         long result;
         int syscall;
-#ifdef CONFIG_SYSCALL_DEBUG
-        int index;
-#endif
+
         sc = UPT_SC(&regs->regs);
         SC_START_SYSCALL(sc);
 
         syscall = UPT_SYSCALL_NR(&regs->regs);
-
-#ifdef CONFIG_SYSCALL_DEBUG
-        index = record_syscall_start(syscall);
-#endif
-
         syscall_trace(&regs->regs, 0);
 
         current->thread.nsyscalls++;
@@ -50,7 +43,4 @@ void syscall_handler_tt(int sig, struct pt_regs *regs)
         SC_SET_SYSCALL_RETURN(sc, result);
 
         syscall_trace(&regs->regs, 1);
-#ifdef CONFIG_SYSCALL_DEBUG
-        record_syscall_end(index, result);
-#endif
 }
diff --git a/arch/um/kernel/tt/tracer.c b/arch/um/kernel/tt/tracer.c
index 71daae24e48a..9882342206ec 100644
--- a/arch/um/kernel/tt/tracer.c
+++ b/arch/um/kernel/tt/tracer.c
@@ -188,10 +188,7 @@ int tracer(int (*init_proc)(void *), void *sp)
         int status, pid = 0, sig = 0, cont_type, tracing = 0, op = 0;
         int proc_id = 0, n, err, old_tracing = 0, strace = 0;
         int local_using_sysemu = 0;
-#ifdef UML_CONFIG_SYSCALL_DEBUG
-        unsigned long eip = 0;
-        int last_index;
-#endif
+
         signal(SIGPIPE, SIG_IGN);
         setup_tracer_winch();
         tracing_pid = os_getpid();
@@ -282,23 +279,6 @@ int tracer(int (*init_proc)(void *), void *sp)
                 else if(WIFSTOPPED(status)){
                         proc_id = pid_to_processor_id(pid);
                         sig = WSTOPSIG(status);
-#ifdef UML_CONFIG_SYSCALL_DEBUG
-                        if(signal_index[proc_id] == 1024){
-                                signal_index[proc_id] = 0;
-                                last_index = 1023;
-                        }
-                        else last_index = signal_index[proc_id] - 1;
-                        if(((sig == SIGPROF) || (sig == SIGVTALRM) ||
-                            (sig == SIGALRM)) &&
-                           (signal_record[proc_id][last_index].signal == sig)&&
-                           (signal_record[proc_id][last_index].pid == pid))
-                                signal_index[proc_id] = last_index;
-                        signal_record[proc_id][signal_index[proc_id]].pid = pid;
-                        gettimeofday(&signal_record[proc_id][signal_index[proc_id]].time, NULL);
-                        eip = ptrace(PTRACE_PEEKUSR, pid, PT_IP_OFFSET, 0);
-                        signal_record[proc_id][signal_index[proc_id]].addr = eip;
-                        signal_record[proc_id][signal_index[proc_id]++].signal = sig;
-#endif
                         if(proc_id == -1){
                                 sleeping_process_signal(pid, sig);
                                 continue;
diff --git a/arch/um/kernel/um_arch.c b/arch/um/kernel/um_arch.c
index 37cfe7701f06..7896cf98232d 100644
--- a/arch/um/kernel/um_arch.c
+++ b/arch/um/kernel/um_arch.c
@@ -330,6 +330,8 @@ EXPORT_SYMBOL(end_iomem);
 
 #define MIN_VMALLOC (32 * 1024 * 1024)
 
+extern char __binary_start;
+
 int linux_main(int argc, char **argv)
 {
         unsigned long avail, diff;
@@ -374,8 +376,9 @@ int linux_main(int argc, char **argv)
 
         printf("UML running in %s mode\n", mode);
 
-        uml_start = CHOOSE_MODE_PROC(set_task_sizes_tt, set_task_sizes_skas, 0,
-                                     &host_task_size, &task_size);
+        uml_start = (unsigned long) &__binary_start;
+        host_task_size = CHOOSE_MODE_PROC(set_task_sizes_tt,
+                                          set_task_sizes_skas, &task_size);
 
         /*
          * Setting up handlers to 'sig_info' struct
@@ -395,7 +398,7 @@ int linux_main(int argc, char **argv)
                 physmem_size += UML_ROUND_UP(brk_start) - UML_ROUND_UP(&_end);
         }
 
-        uml_physmem = uml_start;
+        uml_physmem = uml_start & PAGE_MASK;
 
         /* Reserve up to 4M after the current brk */
         uml_reserved = ROUND_4M(brk_start) + (1 << 22);
diff --git a/arch/um/kernel/uml.lds.S b/arch/um/kernel/uml.lds.S
index af11915ce0a8..8eca47a6ff08 100644
--- a/arch/um/kernel/uml.lds.S
+++ b/arch/um/kernel/uml.lds.S
@@ -7,13 +7,16 @@ jiffies = jiffies_64;
 
 SECTIONS
 {
-  /*This must contain the right address - not quite the default ELF one.*/
+  /* This must contain the right address - not quite the default ELF one.*/
   PROVIDE (__executable_start = START);
-  . = START + SIZEOF_HEADERS;
+  /* Static binaries stick stuff here, like the sigreturn trampoline,
+   * invisibly to objdump.  So, just make __binary_start equal to the very
+   * beginning of the executable, and if there are unmapped pages after this,
+   * they are forever unusable.
+   */
+  __binary_start = START;
 
-  /* Used in arch/um/kernel/mem.c. Any memory between START and __binary_start
-   * is remapped.*/
-  __binary_start = .;
+  . = START + SIZEOF_HEADERS;
 
 #ifdef MODE_TT
   .remap_data : { UNMAP_PATH (.data .bss) }
diff --git a/arch/um/kernel/vmlinux.lds.S b/arch/um/kernel/vmlinux.lds.S
index 72acdce205e0..f8aeb448aab6 100644
--- a/arch/um/kernel/vmlinux.lds.S
+++ b/arch/um/kernel/vmlinux.lds.S
@@ -1,5 +1,3 @@
-/* in case the preprocessor is a 32bit one */
-#undef i386
 #ifdef CONFIG_LD_SCRIPT_STATIC
 #include "uml.lds.S"
 #else