StdLib/LibC/Main/Main.c

   1 /** @file
   2   Establish the program environment and the "main" entry point.
   3
   4   All of the global data in the gMD structure is initialized to 0, NULL, or
   5   SIG_DFL; as appropriate.
   6
   7   Copyright (c) 2010, Intel Corporation. All rights reserved.<BR>
   8   This program and the accompanying materials are licensed and made available under
   9   the terms and conditions of the BSD License that accompanies this distribution.
  10   The full text of the license may be found at
  11   http://opensource.org/licenses/bsd-license.php.
  12
  13   THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
  14   WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
  15 **/
  16 #include  <Uefi.h>
  17 #include  <Library/UefiLib.h>
  18
  19 #include  <Library/ShellCEntryLib.h>
  20 #include  <Library/MemoryAllocationLib.h>
  21 #include  <Library/TimerLib.h>
  22
  23 #include  <LibConfig.h>
  24
  25 #include  <errno.h>
  26 #include  <stdio.h>
  27 #include  <string.h>
  28 #include  <MainData.h>
  29
  30 extern int main( int, wchar_t**);
  31 extern int __sse2_available;
  32
  33 struct  __MainData  *gMD;
  34
  35 /* Worker function to keep GCC happy. */
  36 void __main()
  37 {
  38   ;
  39 }
  40
  41 INTN
  42 EFIAPI
  43 ShellAppMain (
  44   IN UINTN Argc,
  45   IN CHAR16 **Argv
  46   )
  47 {
  48   INTN   ExitVal;
  49   INTN   i;
  50   struct __filedes *mfd;
  51   FILE  *fp;
  52
  53   ExitVal = (INTN)RETURN_SUCCESS;
  54   gMD = AllocateZeroPool(sizeof(struct __MainData));
  55   if( gMD == NULL ) {
  56     ExitVal = (INTN)RETURN_OUT_OF_RESOURCES;
  57   }
  58   else {
  59     /* Initialize data */
  60     __sse2_available      = 0;
  61     _fltused              = 1;
  62     errno                 = 0;
  63     EFIerrno              = 0;
  64
  65 #ifdef NT32dvm
  66     gMD->ClocksPerSecond  = 0;  // For NT32 only
  67     gMD->AppStartTime     = 0;  // For NT32 only
  68 #else
  69     gMD->ClocksPerSecond = (clock_t)GetPerformanceCounterProperties( NULL, NULL);
  70     gMD->AppStartTime = (clock_t)GetPerformanceCounter();
  71 #endif  /* NT32 dvm */
  72
  73     // Initialize file descriptors
  74     mfd = gMD->fdarray;
  75     for(i = 0; i < (FOPEN_MAX); ++i) {
  76       mfd[i].MyFD = (UINT16)i;
  77     }
  78
  79     // Open stdin, stdout, stderr
  80     fp = freopen("stdin:", "r", stdin);
  81     if(fp != NULL) {
  82       fp = freopen("stdout:", "w", stdout);
  83       if(fp != NULL) {
  84         fp = freopen("stderr:", "w", stderr);
  85       }
  86     }
  87     if(fp == NULL) {
  88       Print(L"ERROR Initializing Standard IO: %a.\n    %r\n",
  89             strerror(errno), EFIerrno);
  90     }
  91
  92     ExitVal = (INTN)main( (int)Argc, (wchar_t **)Argv);
  93
  94     if (gMD->cleanup != NULL) {
  95       gMD->cleanup();
  96     }
  97   }
  98   if(gMD != NULL) {
  99     FreePool( gMD );
 100   }
 101   return ExitVal;
 102 }