WebSVN – Kolibri OS – Diff – /programs/develop/libraries/newlib/crt/crt1.c


/*
 * crt1.c
 * This file has no copyright assigned and is placed in the Public Domain.
 * This file is a part of the mingw-runtime package.
 * No warranty is given; refer to the file DISCLAIMER within the package.
 *
 * Source code for the startup proceedures used by all programs. This code
 * is compiled to make crt1.o, which should be located in the library path.
 *
 */
 
/* Hide the declaration of _fmode with dllimport attribute in stdlib.h to
   avoid problems with older GCC. */
 
#include 
#include 
#include 
#include 
#include 
#include 
 
#include "cpu_features.h"
 
 
/* NOTE: The code for initializing the _argv, _argc, and environ variables
 *       has been moved to a separate .c file which is included in both
 *       crt1.c and dllcrt1.c. This means changes in the code don't have to
 *       be manually synchronized, but it does lead to this not-generally-
 *       a-good-idea use of include. */
 
 
extern char __cmdline[];
extern char __pgmname[];
 
extern int main (int, char **, char **);
 
int   _errno;
int   _fmode;
 
char  __appcwd[1024];
int   __appcwdlen;
 
int    _argc;
char **_argv;
 
static char *arg[2];
 
void   _exit(int __status) __attribute__((noreturn));
 
 
char * __libc_getenv(const char *name)
{
    return NULL;
}
 
void __main (){};
 
struct app_hdr
{
    char  banner[8];
    int   version;
    int   start;
    int   iend;
    int   memsize;
    int   stacktop;
    char  *cmdline;
    char  *path;
};
 
typedef void (*ctp)();
static void __do_global_ctors ()
{
  extern int __CTOR_LIST__;
  int *c = &__CTOR_LIST__;
  c++;
  while (*c)
    {
      ctp d = (ctp)*c;
      (d)();
      c++;
    }
}
 
void  __attribute__((noreturn))
__crt_startup (void)
{
    int nRet;
    struct   app_hdr *header;
 
 
    init_global_reent();
 
  /*
   * Initialize floating point unit.
   */
    __cpu_features_init ();   /* Do we have SSE, etc.*/
//  _fpreset ();              /* Supplied by the runtime library. */
 
    __do_global_ctors();
 
    __appcwdlen = strrchr(&__pgmname, '/') - &__pgmname + 1;
    __appcwdlen = __appcwdlen > 1023 ? 1023 : __appcwdlen;
    memcpy(__appcwd, &__pgmname, __appcwdlen);
    __appcwd[__appcwdlen] = 0;
 
    set_cwd(__appcwd);
 
    arg[0] = &__pgmname;
 
    if( __cmdline[0] != 0)
    {
        _argc = 2;
        arg[1] = &__cmdline;
    } else _argc = 1;
 
    _argv = arg;
 
  /*
   * Sets the default file mode.
   * If _CRT_fmode is set, also set mode for stdin, stdout
   * and stderr, as well
   * NOTE: DLLs don't do this because that would be rude!
   */
//  _mingw32_init_fmode ();
 
 
    nRet = main (_argc, _argv, NULL);
 
  /*
   * Perform exit processing for the C library. This means
   * flushing output and calling 'atexit' registered functions.
   */
    exit (nRet);
}

Rev 3593	Rev 3805
1	/*	1	/*
2	* crt1.c	2	* crt1.c
3	* This file has no copyright assigned and is placed in the Public Domain.	3	* This file has no copyright assigned and is placed in the Public Domain.
4	* This file is a part of the mingw-runtime package.	4	* This file is a part of the mingw-runtime package.
5	* No warranty is given; refer to the file DISCLAIMER within the package.	5	* No warranty is given; refer to the file DISCLAIMER within the package.
6	*	6	*
7	* Source code for the startup proceedures used by all programs. This code	7	* Source code for the startup proceedures used by all programs. This code
8	* is compiled to make crt1.o, which should be located in the library path.	8	* is compiled to make crt1.o, which should be located in the library path.
9	*	9	*
10	*/	10	*/
11		11
12	/* Hide the declaration of _fmode with dllimport attribute in stdlib.h to	12	/* Hide the declaration of _fmode with dllimport attribute in stdlib.h to
13	avoid problems with older GCC. */	13	avoid problems with older GCC. */
14		14
15	#include	15	#include
16	#include	16	#include
17	#include	17	#include
18	#include	18	#include
19	#include	19	#include
20	#include	20	#include
21		21
22	#include "cpu_features.h"	22	#include "cpu_features.h"
23		23
24		24
25	/* NOTE: The code for initializing the _argv, _argc, and environ variables	25	/* NOTE: The code for initializing the _argv, _argc, and environ variables
26	* has been moved to a separate .c file which is included in both	26	* has been moved to a separate .c file which is included in both
27	* crt1.c and dllcrt1.c. This means changes in the code don't have to	27	* crt1.c and dllcrt1.c. This means changes in the code don't have to
28	* be manually synchronized, but it does lead to this not-generally-	28	* be manually synchronized, but it does lead to this not-generally-
29	* a-good-idea use of include. */	29	* a-good-idea use of include. */
30		30
31		31
32	extern char __cmdline;	32	extern char __cmdline[];
33	extern char __pgmname;	33	extern char __pgmname[];
34		34
35	extern int main (int, char , char );	35	extern int main (int, char , char );
36		36
37	int _errno;	37	int _errno;
38	int _fmode;	38	int _fmode;
39		39
40	char __appcwd[1024];	40	char __appcwd[1024];
41	int __appcwdlen;	41	int __appcwdlen;
42		42
43	int _argc;	43	int _argc;
44	char **_argv;	44	char **_argv;
45		45
46	static char *arg[2];	46	static char *arg[2];
47		47
48	void _exit(int __status) __attribute__((noreturn));	48	void _exit(int __status) __attribute__((noreturn));
49		49
50		50
51	char * __libc_getenv(const char *name)	51	char * __libc_getenv(const char *name)
52	{	52	{
53	return NULL;	53	return NULL;
54	}	54	}
55		55
56	void __main (){};	56	void __main (){};
57		57
58	struct app_hdr	58	struct app_hdr
59	{	59	{
60	char banner[8];	60	char banner[8];
61	int version;	61	int version;
62	int start;	62	int start;
63	int iend;	63	int iend;
64	int memsize;	64	int memsize;
65	int stacktop;	65	int stacktop;
66	char *cmdline;	66	char *cmdline;
67	char *path;	67	char *path;
68	};	68	};
69		69
70	typedef void (*ctp)();	70	typedef void (*ctp)();
71	static void __do_global_ctors ()	71	static void __do_global_ctors ()
72	{	72	{
73	extern int __CTOR_LIST__;	73	extern int __CTOR_LIST__;
74	int *c = &__CTOR_LIST__;	74	int *c = &__CTOR_LIST__;
75	c++;	75	c++;
76	while (*c)	76	while (*c)
77	{	77	{
78	ctp d = (ctp)*c;	78	ctp d = (ctp)*c;
79	(d)();	79	(d)();
80	c++;	80	c++;
81	}	81	}
82	}	82	}
83		83
84	void __attribute__((noreturn))	84	void __attribute__((noreturn))
85	__crt_startup (void)	85	__crt_startup (void)
86	{	86	{
87	int nRet;	87	int nRet;
88	struct app_hdr *header;	88	struct app_hdr *header;
89		89
90		90
91	init_global_reent();	91	init_global_reent();
92		92
93	/*	93	/*
94	* Initialize floating point unit.	94	* Initialize floating point unit.
95	*/	95	*/
96	__cpu_features_init (); /* Do we have SSE, etc.*/	96	__cpu_features_init (); /* Do we have SSE, etc.*/
97	// _fpreset (); /* Supplied by the runtime library. */	97	// _fpreset (); /* Supplied by the runtime library. */
98		98
99	__do_global_ctors();	99	__do_global_ctors();
100		100
101	__appcwdlen = strrchr(&__pgmname, '/') - &__pgmname + 1;	101	__appcwdlen = strrchr(&__pgmname, '/') - &__pgmname + 1;
102	__appcwdlen = __appcwdlen > 1023 ? 1023 : __appcwdlen;	102	__appcwdlen = __appcwdlen > 1023 ? 1023 : __appcwdlen;
103	memcpy(__appcwd, &__pgmname, __appcwdlen);	103	memcpy(__appcwd, &__pgmname, __appcwdlen);
104	__appcwd[__appcwdlen] = 0;	104	__appcwd[__appcwdlen] = 0;
105		105
106	set_cwd(__appcwd);	106	set_cwd(__appcwd);
107		107
108	arg[0] = &__pgmname;	108	arg[0] = &__pgmname;
109		109
110	if( __cmdline != 0)	110	if( __cmdline[0] != 0)
111	{	111	{
112	_argc = 2;	112	_argc = 2;
113	arg[1] = &__cmdline;	113	arg[1] = &__cmdline;
114	} else _argc = 1;	114	} else _argc = 1;
115		115
116	_argv = arg;	116	_argv = arg;
117		117
118	/*	118	/*
119	* Sets the default file mode.	119	* Sets the default file mode.
120	* If _CRT_fmode is set, also set mode for stdin, stdout	120	* If _CRT_fmode is set, also set mode for stdin, stdout
121	* and stderr, as well	121	* and stderr, as well
122	* NOTE: DLLs don't do this because that would be rude!	122	* NOTE: DLLs don't do this because that would be rude!
123	*/	123	*/
124	// _mingw32_init_fmode ();	124	// _mingw32_init_fmode ();
125		125
126		126
127	nRet = main (_argc, _argv, NULL);	127	nRet = main (_argc, _argv, NULL);
128		128
129	/*	129	/*
130	* Perform exit processing for the C library. This means	130	* Perform exit processing for the C library. This means
131	* flushing output and calling 'atexit' registered functions.	131	* flushing output and calling 'atexit' registered functions.
132	*/	132	*/
133	exit (nRet);	133	exit (nRet);
134	}	134	}

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(root)/programs/develop/libraries/newlib/crt/crt1.c – Rev 3593 → 3805