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| /* |
| * 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); |
| } |
| |
| |
| |