new file mode 100644
--- /dev/null
+++ b/packages/redboot/current/src/alias.c
@@ -0,0 +1,173 @@
+//==========================================================================
+//
+//      alias.c
+//
+//      RedBoot - alias support
+//
+//==========================================================================
+//####ECOSGPLCOPYRIGHTBEGIN####
+// -------------------------------------------
+// This file is part of eCos, the Embedded Configurable Operating System.
+// Copyright (C) 1998, 1999, 2000, 2001, 2002 Red Hat, Inc.
+//
+// eCos is free software; you can redistribute it and/or modify it under
+// the terms of the GNU General Public License as published by the Free
+// Software Foundation; either version 2 or (at your option) any later version.
+//
+// eCos is distributed in the hope that it will be useful, but WITHOUT ANY
+// WARRANTY; without even the implied warranty of MERCHANTABILITY or
+// FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+// for more details.
+//
+// You should have received a copy of the GNU General Public License along
+// with eCos; if not, write to the Free Software Foundation, Inc.,
+// 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
+//
+// As a special exception, if other files instantiate templates or use macros
+// or inline functions from this file, or you compile this file and link it
+// with other works to produce a work based on this file, this file does not
+// by itself cause the resulting work to be covered by the GNU General Public
+// License. However the source code for this file must still be made available
+// in accordance with section (3) of the GNU General Public License.
+//
+// This exception does not invalidate any other reasons why a work based on
+// this file might be covered by the GNU General Public License.
+//
+// Alternative licenses for eCos may be arranged by contacting Red Hat, Inc.
+// at http://sources.redhat.com/ecos/ecos-license
+// -------------------------------------------
+//####ECOSGPLCOPYRIGHTEND####
+//==========================================================================
+//#####DESCRIPTIONBEGIN####
+//
+// Author(s):    gthomas
+// Contributors: gthomas, jskov
+// Date:         2002-05-15
+// Purpose:      
+// Description:  
+//              
+// This code is part of RedBoot (tm).
+//
+//####DESCRIPTIONEND####
+//
+//==========================================================================
+
+#include <redboot.h>
+
+#ifdef CYGNUM_REDBOOT_FLASH_STRING_SIZE
+# define MAX_STRING_LENGTH CYGNUM_REDBOOT_FLASH_STRING_SIZE
+#else
+# define MAX_STRING_LENGTH 32
+#endif
+
+// Lookup an alias. First try plain string aliases. If that fails try
+// other types so allowing access to all configured values. This allows
+// for alias (macro) expansion of normal 'fconfig' data, such as the
+// board IP address.
+static char *
+lookup_alias(char *alias, char *alias_buf)
+{
+    if (0 == strcasecmp("FREEMEMLO", alias)) {
+        diag_sprintf(alias_buf,"%p", ((CYG_ADDRWORD)user_ram_start + 0x03ff) & ~0x03ff);
+        return alias_buf;
+    } else if (0 == strcasecmp("FREEMEMHI", alias)) {
+        diag_sprintf(alias_buf,"%p", ((CYG_ADDRWORD)user_ram_end - 0x03ff) & ~0x03ff);
+        return alias_buf;
+    }
+
+#ifdef CYGSEM_REDBOOT_FLASH_ALIASES
+    return flash_lookup_alias(alias, alias_buf);
+#else
+    return NULL;
+#endif
+}
+
+// Expand aliases, this is recursive. ie if one alias contains other
+// aliases, these will also be expanded from the insertion point
+// onwards.
+//
+// If 'iter' is zero, then quoted strings are not expanded
+//
+static bool
+_expand_aliases(char *line, int len, int iter)
+{
+    char *lp = line;
+    char *ms, *me, *ep;
+    char *alias;
+    char c;
+    int offset, line_len, alias_len;
+    char alias_buf[MAX_STRING_LENGTH];
+    bool macro_found = false;
+
+    if ((line_len = strlen(line)) != 0) {
+        while (*lp) {
+            c = *lp++;
+            if ((c == '%') && (*lp == '{')) {
+                // Found a macro/alias to expand
+                ms = lp+1;
+                lp += 2;
+                while (*lp && (*lp != '}')) lp++;
+                if (!*lp) {
+                    diag_printf("Invalid macro/alias '%s'\n", ms);
+                    line[0] = '\0';  // Destroy line
+                    return false;
+                }
+                me = lp;
+                *me = '\0';
+                lp++;
+                if ((alias = lookup_alias(ms,alias_buf)) != (char *)NULL) {
+                    alias_len = strlen(alias);
+                    // See if there is room in the line to expand this macro/alias
+                    if ((line_len+alias_len) < len) {
+                        // Make a hole by moving data within the line
+                        offset = alias_len-strlen(ms)-2;  // Number of bytes being inserted
+			ep = &lp[strlen(lp)-1];
+			if (offset > 1) {
+                            ep[offset] = '\0';
+                            while (ep != (lp-1)) {
+                                ep[offset-1] = *ep;
+                                ep--;
+                            }           
+			} else {
+                            if (offset <=0) {
+                                while ((lp-1) != ep) {
+                                    lp[offset-1] = *lp;
+                                    lp++;
+                                }
+                                lp[offset-1]='\0';
+                            }
+			}
+                        // Insert the macro/alias data
+                        lp = ms-2;
+                        while (*alias) {
+                            if ((alias[0] == '%') && (alias[1] == '{')) macro_found = true;
+                            *lp++ = *alias++;
+                        }
+                        line_len = strlen(line);
+			lp = lp - alias_len;
+                    } else {
+                        diag_printf("No room to expand '%s'\n", ms);
+                        line[0] = '\0';  // Destroy line
+                        return false;
+                    }
+                } else {
+                    diag_printf("Alias '%s' not defined\n", ms);
+                    *me = '|';
+                }
+            } else if ((c == '"') && (iter == 0)) {
+                // Skip quoted strings
+                while (*lp && (*lp != '"')) lp++;
+            }            
+        }
+    }
+    return macro_found;
+}
+
+void
+expand_aliases(char *line, int len)
+{
+    int iter = 0;
+
+    while (_expand_aliases(line, len, iter++)) {
+    }
+}