20000317 sourceware import

libgloss/sparc/syscalls.c

@@ -0,0 +1,85 @@
+/* Copyright (c) 1995 Cygnus Support
+ *
+ * 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.
+ *
+ * fake unix routines for sparclite and remote debugger
+ * Many of these routines just substitute an appropriate error status,
+ * if you want some kind of file system access, you'll have to fill them in...
+ * sbrk on the other hand is functional (malloc uses it) but it doesn't do 
+ * any checking for lack of memory. 
+ * kill and _exit could get more real implementations, as well.
+ */
+
+#include <sys/stat.h>
+
+int
+fstat(int _fd, struct stat* _sbuf)
+{
+  /* this is used in a few places in stdio... */
+  /* just error, so they assume a pipe */
+  return -1;
+}
+
+int
+isatty(int _fd)
+{
+  return 1;
+}
+
+int
+close(int _fd)
+{
+  /* return value usually ignored anyhow */
+  return 0;
+}
+
+int 
+open(char *filename)
+{
+  /* always fail */
+  return -1;
+}
+
+int 
+getpid() {
+  return 1;
+}
+
+int 
+kill(int pid) {
+  /* if we knew how to nuke the board, we would... */
+  return 0;
+}
+
+void
+_exit(int status) {
+  /* likewise... */
+  return;
+}
+
+int
+lseek(int _fd, off_t offset, int whence)
+{
+  /* nothing is ever seekable */
+  return -1;
+}
+
+extern char end;
+char*
+sbrk(int incr)
+{
+  static char* base;
+  char *b;
+  if(!base) base = &end;
+  b = base;
+  base += incr;
+  return b;
+}