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[mirror_edk2.git] / StdLib / LibC / Main / Main.c

/** @file\r
  Establish the program environment and the "main" entry point.\r
\r
  All of the global data in the gMD structure is initialized to 0, NULL, or\r
  SIG_DFL; as appropriate.\r
\r
  Copyright (c) 2010 - 2011, Intel Corporation. All rights reserved.<BR>\r
  This program and the accompanying materials are licensed and made available under\r
  the terms and conditions of the BSD License that accompanies this distribution.\r
  The full text of the license may be found at\r
  http://opensource.org/licenses/bsd-license.\r
\r
  THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,\r
  WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.\r
**/\r
#include  <Uefi.h>\r
#include  <Library/UefiLib.h>\r
#include  <Library/DebugLib.h>\r
\r
#include  <Library/ShellCEntryLib.h>\r
#include  <Library/MemoryAllocationLib.h>\r
#include  <Library/TimerLib.h>\r
\r
#include  <LibConfig.h>\r
\r
#include  <errno.h>\r
#include  <stdio.h>\r
#include  <stdlib.h>\r
#include  <string.h>\r
#include  <MainData.h>\r
#include  <sys/EfiSysCall.h>\r
\r
extern int main( int, char**);\r
extern int __sse2_available;\r
\r
struct  __MainData  *gMD;\r
\r
/* Worker function to keep GCC happy. */\r
void __main()\r
{\r
  ;\r
}\r
\r
/** Clean up data as required by the exit() function.\r
\r
**/\r
void\r
exitCleanup(INTN ExitVal)\r
{\r
  void (*CleanUp)(void);   // Pointer to Cleanup Function\r
  int i;\r
\r
  if(gMD != NULL) {\r
    gMD->ExitValue = (int)ExitVal;\r
    CleanUp = gMD->cleanup; // Preserve the pointer to the Cleanup Function\r
\r
    // Call all registered atexit functions in reverse order\r
    i = gMD->num_atexit;\r
    if( i > 0) {\r
      do {\r
        (gMD->atexit_handler[--i])();\r
      } while( i > 0);\r
  }\r
\r
    if (CleanUp != NULL) {\r
      CleanUp();\r
    }\r
  }\r
}\r
\r
/* Create mbcs versions of the Argv strings. */\r
static\r
char **\r
ArgvConvert(UINTN Argc, CHAR16 **Argv)\r
{\r
  size_t  AVsz;       /* Size of a single nArgv string */\r
  UINTN   count;\r
  char  **nArgv;\r
  char   *string;\r
  INTN    nArgvSize;  /* Cumulative size of narrow Argv[i] */\r
\r
DEBUG_CODE_BEGIN();\r
  Print(L"ArgvConvert called with %d arguments.\n", Argc);\r
  for(count = 0; count < ((Argc > 5)? 5: Argc); ++count) {\r
    Print(L"Argument[%d] = \"%s\".\n", count, Argv[count]);\r
  }\r
DEBUG_CODE_END();\r
\r
  nArgvSize = Argc;\r
  /* Determine space needed for narrow Argv strings. */\r
  for(count = 0; count < Argc; ++count) {\r
    AVsz = wcstombs(NULL, Argv[count], ARG_MAX);\r
    if(AVsz < 0) {\r
      Print(L"ABORTING: Argv[%d] contains an unconvertable character.\n", count);\r
      exit(EXIT_FAILURE);\r
      /* Not Reached */\r
    }\r
    nArgvSize += AVsz;\r
  }\r
\r
  /* Reserve space for the converted strings. */\r
  gMD->NCmdLine = (char *)AllocateZeroPool(nArgvSize+1);\r
  if(gMD->NCmdLine == NULL) {\r
    Print(L"ABORTING: Insufficient memory.\n");\r
    exit(EXIT_FAILURE);\r
    /* Not Reached */\r
  }\r
\r
  /* Convert Argument Strings. */\r
  nArgv   = gMD->NArgV;\r
  string  = gMD->NCmdLine;\r
  for(count = 0; count < Argc; ++count) {\r
    nArgv[count] = string;\r
    AVsz = wcstombs(string, Argv[count], nArgvSize);\r
    string[AVsz] = 0;   /* NULL terminate the argument */\r
    DEBUG((DEBUG_INFO, "Cvt[%d] %d \"%s\" --> \"%a\"\n", (INT32)count, (INT32)AVsz, Argv[count], nArgv[count]));\r
    string += AVsz + 1;\r
    nArgvSize -= AVsz + 1;\r
    if(nArgvSize < 0) {\r
      Print(L"ABORTING: Internal Argv[%d] conversion error.\n", count);\r
      exit(EXIT_FAILURE);\r
      /* Not Reached */\r
    }\r
  }\r
  return gMD->NArgV;\r
}\r
\r
INTN\r
EFIAPI\r
ShellAppMain (\r
  IN UINTN Argc,\r
  IN CHAR16 **Argv\r
  )\r
{\r
  struct __filedes   *mfd;\r
  char              **nArgv;\r
  INTN   ExitVal;\r
  int                 i;\r
\r
  ExitVal = (INTN)RETURN_SUCCESS;\r
  gMD = AllocateZeroPool(sizeof(struct __MainData));\r
  if( gMD == NULL ) {\r
    ExitVal = (INTN)RETURN_OUT_OF_RESOURCES;\r
  }\r
  else {\r
    /* Initialize data */\r
    __sse2_available      = 0;\r
    _fltused              = 1;\r
    errno                 = 0;\r
    EFIerrno              = 0;\r
\r
#ifdef NT32dvm\r
    gMD->ClocksPerSecond  = 1;  // For NT32 only\r
    gMD->AppStartTime     = 1;  // For NT32 only\r
#else\r
    gMD->ClocksPerSecond = (clock_t)GetPerformanceCounterProperties( NULL, NULL);\r
    gMD->AppStartTime = (clock_t)GetPerformanceCounter();\r
#endif  /* NT32 dvm */\r
\r
    // Initialize file descriptors\r
    mfd = gMD->fdarray;\r
    for(i = 0; i < (FOPEN_MAX); ++i) {\r
      mfd[i].MyFD = (UINT16)i;\r
    }\r
\r
    i = open("stdin:", O_RDONLY, 0444);\r
    if(i == 0) {\r
      i = open("stdout:", O_WRONLY, 0222);\r
      if(i == 1) {\r
        i = open("stderr:", O_WRONLY, 0222);\r
      }\r
    }\r
    if(i != 2) {\r
      Print(L"ERROR Initializing Standard IO: %a.\n    %r\n",\r
            strerror(errno), EFIerrno);\r
    }\r
\r
    /* Create mbcs versions of the Argv strings. */\r
    nArgv = ArgvConvert(Argc, Argv);\r
    if(nArgv == NULL) {\r
      ExitVal = (INTN)RETURN_INVALID_PARAMETER;\r
    }\r
    else {\r
      if( setjmp(gMD->MainExit) == 0) {\r
        ExitVal = (INTN)main( (int)Argc, gMD->NArgV);\r
        exitCleanup(ExitVal);\r
      }\r
      /* You reach here if:\r
          * normal return from main()\r
          * call to _Exit(), either directly or through exit().\r
      */\r
      ExitVal = (INTN)gMD->ExitValue;\r
    }\r
\r
    if( ExitVal == EXIT_FAILURE) {\r
      ExitVal = RETURN_ABORTED;\r
    }\r
\r
    /* Close any open files */\r
    for(i = OPEN_MAX - 1; i >= 0; --i) {\r
      (void)close(i);   // Close properly handles closing a closed file.\r
    }\r
\r
    /* Free the global MainData structure */\r
    if(gMD != NULL) {\r
      if(gMD->NCmdLine != NULL) {\r
        FreePool( gMD->NCmdLine );\r
      }\r
      FreePool( gMD );\r
  }\r
  }\r
  return ExitVal;\r
}\r