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- /*
- * Manuel Novoa III Feb 2001
- *
- * __uClibc_main is the routine to be called by all the arch-specific
- * versions of crt0.S in uClibc.
- *
- * It is meant to handle any special initialization needed by the library
- * such as setting the global variable(s) __environ (environ) and
- * initializing the stdio package. Using weak symbols, the latter is
- * avoided in the static library case.
- */
- #include <stdlib.h>
- #include <unistd.h>
- #include <errno.h>
- /*
- * Prototypes.
- */
- extern int main(int argc, char **argv, char **envp);
- extern void __uClibc_empty_func(void);
- void __uClibc_main(int argc, char **argv, char **envp)
- __attribute__ ((__noreturn__));
- #ifdef HAVE_ELF
- weak_alias(__environ, environ);
- weak_symbol(__init_stdio);
- weak_symbol(__stdio_close_all);
- #endif
- extern void __init_stdio(void);
- extern void __stdio_close_all(void);
- typedef void (*vfuncp) (void);
- vfuncp __uClibc_cleanup = __stdio_close_all;
- /*
- * Now for our main routine.
- */
- void __uClibc_main(int argc, char **argv, char **envp)
- {
- /*
- * Initialize the global variable __environ.
- */
- __environ = envp;
- /*
- * Initialize stdio here. In the static library case, this will
- * be bypassed if not needed because of the weak alias above.
- */
- if (__init_stdio)
- __init_stdio();
- /*
- * Note: It is possible that any initialization done above could
- * have resulted in errno being set nonzero, so set it to 0 before
- * we call main.
- */
- __set_errno(0);
- /*
- * Finally, invoke application's main and then exit.
- */
- exit(main(argc, argv, envp));
- }
- /*
- * Declare the __environ global variable and create a weak alias environ.
- * Note: Apparently we must initialize __environ for the weak environ
- * symbol to be included.
- */
- char **__environ = 0;
- #ifndef HAVE_ELF
- /*
- * Define an empty function and use it as a weak alias for the stdio
- * initialization routine. That way we don't pull in all the stdio
- * code unless we need to. Similarly, do the same for __stdio_close_all
- * so as not to include atexit unnecessarily.
- *
- * NOTE!!! This is only true for the _static_ case!!!
- */
- void __uClibc_empty_func(void)
- {
- }
- weak_alias(__environ, environ);
- /*weak_alias(__uClibc_empty_func, __init_stdio);*/
- /*weak_alias(__uClibc_empty_func, __stdio_close_all);*/
- #endif
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