20000317 sourceware import

libgloss/mips/nullmon.c

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+/* nullmon.c - Stub or monitor services.
+ *
+ * Copyright (c) 1998 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.
+ */
+
+/* This is a ROMSTUB
+    Various libraries in libgloss may reference board specific services.
+   These are often performed by system calls and by rom specific
+   interfaces such as dvemon.c This file defines the null interface in
+   which the rom monitor either does not exist or is not used.
+   Linking with this file supports applications which only exercise
+   the processor, specifically, the GDB test suite.
+   By linking this object in rather than a monitor specific support
+   we can insure that the testsuite will run without references or
+   linkages to nonexistent monitor services.
+   Similarly, every service provided by this file muse be provided by all
+   monitor speciifc interfaces.
+   PLEASE DO NOT MAKE THIS FILE SPECIFIC TO ANY MONITOR
+ */   
+
+/* This form is giving linker relocation errors */
+#if ! defined(BOARD_MEM_SIZE)
+#define BOARD_MEM_SIZE 0x100000 /* About a megabyte */
+#endif
+extern unsigned char _ftext ; /* Defined in nullmon.ld */
+extern unsigned char _end ;   /* Defined in nullmon.ld */
+
+#if defined(FIXME_WARNINGS)
+#warning("FIXME: struct s_mem belongs in a header file")
+#endif
+struct s_mem
+{ unsigned int size;
+  unsigned int icsize;
+  unsigned int dcsize;
+};
+
+void
+get_mem_info (mem)
+     struct s_mem *mem;
+{ char * t1, * t2 ;
+  unsigned long long tmp ;
+  t1 = & _ftext ;
+  t2 = & _end ;
+  tmp = (unsigned long long) (t2 - t1) ;
+  tmp = (unsigned long long) BOARD_MEM_SIZE - tmp ;
+  mem->size = tmp ;
+}
+
+/*  SYSTEM INTERFACE
+  Since we are defining a NULL operating environment here, I am
+  entering the stub definitions for the GNUpro libraries, System Calls.
+  I would rather not to even pretend to support these functions but, they
+  get pulled in by other libraries.
+*/
+ 
+int read(int file, char * ptr , int len) {   return 0 ; }
+int close (int file) { return -1 ; }
+int write(int file , char * ptr, int len) { return 0 ; }
+/*eof*/