newlib/libgloss/cr16/_getenv.c

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/* _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);
}