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/* libc/sys/linux/crt0.c - Run-time initialization */

/* FIXME: This should be rewritten in assembler and

          placed in a subdirectory specific to a platform.

          There should also be calls to run constructors. */

/* Written 2000 by Werner Almesberger */

#include <stdlib.h>

#include <time.h>

#include <string.h>

extern char **environ;

extern int main(int argc,char **argv,char **envp);

extern char _end;

extern char __bss_start;

void _start(int args)

{

    /*

     * The argument block begins above the current stack frame, because we

     * have no return address. The calculation assumes that sizeof(int) ==

     * sizeof(void *). This is okay for i386 user space, but may be invalid in

     * other cases.

     */

    int *params = &args-1;

    int argc = *params;

    char **argv = (char **) (params+1);

    environ = argv+argc+1;

    /* Note: do not clear the .bss section.  When running with shared

     *       libraries, certain data items such __mb_cur_max or environ

     *       may get placed in the .bss, even though they are initialized

     *       to non-zero values.  Clearing the .bss will end up zeroing

     *       out their initial values.  The .bss is already initialized

     *       by this time by Linux.  */

    tzset(); /* initialize timezone info */

    exit(main(argc,argv,environ));

}