Unix version of EFI emulator

git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@2182 6f19259b-4bc3-4df7-8a09-765794883524

EdkUnixPkg/Sec/UnixThunk.c

@@ -0,0 +1,189 @@
+/*++
+
+Copyright (c) 2004 - 2006, Intel Corporation                                                         
+All rights reserved. This program and the accompanying materials                          
+are licensed and made available under the terms and conditions of the BSD License         
+which accompanies this distribution.  The full text of the license may be found at        
+http://opensource.org/licenses/bsd-license.php                                            
+                                                                                          
+THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,                     
+WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.             
+
+Module Name:
+
+  UnixThunk.c
+
+Abstract:
+
+  Since the SEC is the only program in our emulation we 
+  must use a Tiano mechanism to export APIs to other modules.
+  This is the role of the EFI_UNIX_THUNK_PROTOCOL.
+
+  The mUnixThunkTable exists so that a change to EFI_UNIX_THUNK_PROTOCOL
+  will cause an error in initializing the array if all the member functions
+  are not added. It looks like adding a element to end and not initializing
+  it may cause the table to be initaliized with the members at the end being
+  set to zero. This is bad as jumping to zero will crash.
+  
+
+  gUnix is a a public exported global that contains the initialized
+  data.
+
+--*/
+
+#include "SecMain.h"
+#include "Library/UnixLib.h"
+#include <sys/time.h>
+#include <time.h>
+#include <signal.h>
+#include <string.h>
+#include <stdlib.h>
+
+static int settimer_initialized;
+static struct timeval settimer_timeval;
+static void (*settimer_callback)(UINT64 delta);
+
+static void
+settimer_handler (int sig)
+{
+  struct timeval timeval;
+  UINT64 delta;
+
+  gettimeofday (&timeval, NULL);
+  delta = ((UINT64)timeval.tv_sec * 1000) + (timeval.tv_usec / 1000)
+    - ((UINT64)settimer_timeval.tv_sec * 1000) 
+    - (settimer_timeval.tv_usec / 1000);
+  settimer_timeval = timeval;
+  if (settimer_callback)
+    (*settimer_callback)(delta);
+}
+
+static
+VOID
+SetTimer (UINT64 PeriodMs, VOID (*CallBack)(UINT64 DeltaMs))
+{
+  struct itimerval timerval;
+
+  if (!settimer_initialized) {
+    struct sigaction act;
+
+    settimer_initialized = 1;
+    act.sa_handler = settimer_handler;
+    act.sa_flags = 0;
+    sigemptyset (&act.sa_mask);
+    if (sigaction (SIGALRM, &act, NULL) != 0) {
+      printf ("SetTimer: sigaction error %s\n", strerror (errno));
+    }
+    if (gettimeofday (&settimer_timeval, NULL) != 0) {
+      printf ("SetTimer: gettimeofday error %s\n", strerror (errno));
+    }
+  }
+  timerval.it_value.tv_sec = PeriodMs / 1000;
+  timerval.it_value.tv_usec = (PeriodMs % 1000) * 1000;
+  timerval.it_value.tv_sec = PeriodMs / 1000;
+  timerval.it_interval = timerval.it_value;
+  
+  if (setitimer (ITIMER_REAL, &timerval, NULL) != 0) {
+    printf ("SetTimer: setitimer error %s\n", strerror (errno));
+  }
+  settimer_callback = CallBack;
+}
+
+void
+GetLocalTime (EFI_TIME *Time)
+{
+  struct tm *tm;
+  time_t t;
+
+  t = time (NULL);
+  tm = localtime (&t);
+
+  Time->Year = 1900 + tm->tm_year;
+  Time->Month = tm->tm_mon;
+  Time->Day = tm->tm_mday;
+  Time->Hour = tm->tm_hour;
+  Time->Minute = tm->tm_min;
+  Time->Second = tm->tm_sec;
+  Time->Nanosecond = 0;
+  Time->TimeZone = timezone;
+  Time->Daylight = (daylight ? EFI_TIME_ADJUST_DAYLIGHT : 0)
+    | (tm->tm_isdst > 0 ? EFI_TIME_IN_DAYLIGHT : 0);
+}
+
+void
+msSleep (unsigned long Milliseconds)
+{
+  usleep (Milliseconds * 1000);
+}
+
+static void
+TzSet (void)
+{
+  static int done = 0;
+  if (!done) {
+    tzset ();
+    done = 1;
+  }
+}
+
+long
+GetTimeZone(void)
+{
+  TzSet ();
+  return timezone;
+}
+
+int
+GetDayLight(void)
+{
+  TzSet ();
+  return daylight;
+}
+
+int
+GetErrno(void)
+{
+  return errno;
+}
+
+extern EFI_STATUS
+UgaCreate(struct _EFI_UNIX_UGA_IO_PROTOCOL *UgaIo, CONST CHAR16 *Title);
+
+EFI_UNIX_THUNK_PROTOCOL mUnixThunkTable = {
+  EFI_UNIX_THUNK_PROTOCOL_SIGNATURE,
+  msSleep, /* Sleep */
+  exit, /* Exit */
+  SetTimer,
+  GetLocalTime,
+  gmtime,
+  GetTimeZone,
+  GetDayLight,
+  (UnixPoll)poll,
+  (UnixRead)read,
+  (UnixWrite)write,
+  getenv,
+  (UnixOpen)open,
+  lseek,
+  ftruncate,
+  close,
+  mkdir,
+  rmdir,
+  unlink,
+  GetErrno,
+  opendir,
+  rewinddir,
+  readdir,
+  closedir,
+  stat,
+  statfs,
+  rename,
+  mktime,
+  fsync,
+  chmod,
+  utime,
+
+  UgaCreate,
+};
+
+
+EFI_UNIX_THUNK_PROTOCOL *gUnix = &mUnixThunkTable;