Subversion Repositories openrisc_2011-10-31

/* _getenv.c -- Implementation of the low-level _getenv() routine

 *

 * Copyright (c) 2004 National Semiconductor Corporation

 *

 * The authors hereby grant permission to use, copy, modify, distribute,

 * and license this software and its documentation for any purpose, provided

 * that existing copyright notices are retained in all copies and that this

 * notice is included verbatim in any distributions. No written agreement,

 * license, or royalty fee is required for any of the authorized uses.

 * Modifications to this software may be copyrighted by their authors

 * and need not follow the licensing terms described here, provided that

 * the new terms are clearly indicated on the first page of each file where

 * they apply.

 */

#include <sys/syscall.h>

#include <stdlib.h>

register char *R2 __asm__("r2");

register char *R3 __asm__("r3");

char * _getenv (const char *name)

{

  char *x;

  char *y;

  x  = R2;

  y  = (char *) calloc (256, 1);

  R3 = y;

  R2 = x;

  HOST_SERVICE (SVC_GETENV);

}