mirror of
https://github.com/KolibriOS/kolibrios.git
synced 2024-12-24 07:36:48 +03:00
127 lines
2.9 KiB
C
127 lines
2.9 KiB
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 <newlib.h>
|
|
#include <stdint.h>
|
|
#include <stdlib.h>
|
|
#include <string.h>
|
|
#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 (){};
|
|
|
|
|
|
void init_reent();
|
|
|
|
void __attribute__((noreturn))
|
|
__thread_startup (int (*entry)(void*), void *param,
|
|
void *stacklow, void *stackhigh)
|
|
{
|
|
int retval;
|
|
|
|
__asm__ __volatile__( // save stack limits
|
|
"movl %0, %%fs:4 \n\t" // use TLS
|
|
"movl %1, %%fs:8 \n\t"
|
|
::"r"(stacklow), "r"(stackhigh));
|
|
|
|
init_reent(); // initialize thread reentry structure
|
|
|
|
retval = entry(param); // call user thread function
|
|
|
|
_exit(retval);
|
|
};
|
|
|
|
void __attribute__((noreturn))
|
|
__crt_startup (void)
|
|
{
|
|
int nRet;
|
|
|
|
init_reent();
|
|
|
|
/*
|
|
* Initialize floating point unit.
|
|
*/
|
|
__cpu_features_init (); /* Do we have SSE, etc.*/
|
|
// _fpreset (); /* Supplied by the runtime library. */
|
|
|
|
__initPOSIXHandles();
|
|
|
|
__appcwdlen = strrchr(&__pgmname, '/') - &__pgmname + 1;
|
|
|
|
__appcwdlen = __appcwdlen > 1023 ? 1023 : __appcwdlen;
|
|
|
|
strncpy(__appcwd, &__pgmname, __appcwdlen);
|
|
__appcwd[__appcwdlen] = 0;
|
|
|
|
arg[0] = &__pgmname;
|
|
|
|
if( __cmdline != 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);
|
|
}
|
|
|
|
|
|
|