1 files changed, 152 insertions, 22 deletions

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);
 }