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