87 lines
2.4 KiB
C
87 lines
2.4 KiB
C
// =============================================
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// crt1.c
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// For ExitProcess
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// windows.h header file should be included before any other library include
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#include <windows.h>
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#include <stdio.h>
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#include <stdlib.h>
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#define _UNKNOWN_APP 0
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#define _CONSOLE_APP 1
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#define _GUI_APP 2
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#define _MCW_PC 0x00030000 // Precision Control
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#define _PC_24 0x00020000 // 24 bits
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#define _PC_53 0x00010000 // 53 bits
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#define _PC_64 0x00000000 // 64 bits
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#ifndef __TRY__
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#ifdef _WIN64
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#define __TRY__
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#else
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#define __TRY__ void __try__(void**), *_sehrec[6]; __try__(_sehrec);
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#endif
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#endif
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typedef struct
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{
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int newmode;
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} _startupinfo;
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// Prototype of __getmainargs:
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// in msvcrt v6.x : returns void (windows 98, 2000)
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// in msvcrt v7.x : returns int (windows xp and above)
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// Using the last for check the result. A negative value means no success.
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// These are the test results of call to __getmainargs with the heap fully:
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// win 98, 2000 :
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// program termination with error code 255 after call _amsg_exit(8)
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// prints: "runtime error R6008\r\n- not enough space for arguments\r\n"
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// win xp :
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// returns -1
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// win 7, 8 :
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// program termination with error code -1 after call ExitProcess(-1)
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//
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// Checking the return of this function also works on windows 98 and 2000
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// because internally it sets to eax the value of the third parameter.
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// In this case is &env and at that point it is not a negative value.
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int __cdecl __getmainargs(int *pargc, char ***pargv, char ***penv, int globb, _startupinfo*);
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void __cdecl __set_app_type(int apptype);
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unsigned int __cdecl _controlfp(unsigned int new_value, unsigned int mask);
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void _start(void);
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int main(int argc, char * argv[], char * env[]);
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void _start(void)
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{
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__TRY__
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int argc;
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char **argv;
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char **env;
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_startupinfo start_info;
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// Sets the current application type
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__set_app_type(_CONSOLE_APP);
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// Set default FP precision to 53 bits (8-byte double)
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// _MCW_PC (Precision control) is not supported on
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// the ARM and x64 architectures
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#if defined(_X86_) && !defined(__x86_64)
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_controlfp(_PC_53, _MCW_PC);
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#endif
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start_info.newmode = 0;
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if ( __getmainargs( &argc, &argv, &env, 0, &start_info ) < 0 )
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{
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ExitProcess(-1);
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}
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else
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{
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exit( main(argc, argv, env) );
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}
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}
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// =============================================
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