Add symbol table support

git-svn-id: svn://svn.code.sf.net/p/nuttx/code/trunk@1917 42af7a65-404d-4744-a932-0658087f49c3

2 files changed, 103 insertions, 2 deletions

diff --git a/nuttx/binfmt/Makefile b/nuttx/binfmt/Makefile
index 589964c86..30a2fb260 100644
--- a/nuttx/binfmt/Makefile
+++ b/nuttx/binfmt/Makefile
@@ -47,12 +47,16 @@ BINFMT_CSRCS	= binfmt_globals.c binfmt_register.c binfmt_unregister.c \
 		  binfmt_loadmodule.c binfmt_unloadmodule.c binfmt_execmodule.c \
 		  binfmt_dumpmodule.c
 
+SYMTAB_ASRCS	=
+SYMTAB_CSRCS	= symtab_findbyname.c symtab_findbyvalue.c \
+		  symtab_findorderedbyname.c  symtab_findorderedbyvalue.c
+
 SUBDIRS		= libnxflat
 
-ASRCS		= $(BINFMT_ASRCS) $(LIBNXFLAT_ASRCS)
+ASRCS		= $(BINFMT_ASRCS) $(SYMTAB_ASRCS) $(LIBNXFLAT_ASRCS)
 AOBJS		= $(ASRCS:.S=$(OBJEXT))
 
-CSRCS		= $(BINFMT_CSRCS) $(LIBNXFLAT_CSRCS)
+CSRCS		= $(BINFMT_CSRCS) $(SYMTAB_CSRCS) $(LIBNXFLAT_CSRCS)
 COBJS		= $(CSRCS:.c=$(OBJEXT))
 
 SRCS		= $(ASRCS) $(CSRCS)
diff --git a/nuttx/binfmt/symtab_findbyname.c b/nuttx/binfmt/symtab_findbyname.c
new file mode 100644
index 000000000..c56ac161e
--- /dev/null
+++ b/nuttx/binfmt/symtab_findbyname.c
@@ -0,0 +1,97 @@
+/****************************************************************************
+ * binfmt/symtab_findbyname.c
+ *
+ *   Copyright (C) 2009 Gregory Nutt. All rights reserved.
+ *   Author: Gregory Nutt <spudmonkey@racsa.co.cr>
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in
+ *    the documentation and/or other materials provided with the
+ *    distribution.
+ * 3. Neither the name NuttX nor the names of its contributors may be
+ *    used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
+ * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+ * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
+ * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
+ * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
+ * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
+ * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ *
+ ****************************************************************************/
+
+/****************************************************************************
+ * Included Files
+ ****************************************************************************/
+
+#include <nuttx/config.h>
+#include <sys/types.h>
+
+#include <debug.h>
+#include <assert.h>
+#include <errno.h>
+
+#include <nuttx/symtab.h>
+
+/****************************************************************************
+ * Pre-processor Definitions
+ ****************************************************************************/
+
+/****************************************************************************
+ * Private Function Prototypes
+ ****************************************************************************/
+
+/****************************************************************************
+ * Private Data
+ ****************************************************************************/
+
+/****************************************************************************
+ * Private Functions
+ ****************************************************************************/
+
+/***********************************************************************
+ * Public Functions
+ ***********************************************************************/
+
+/****************************************************************************
+ * Name: symtab_findbyname
+ *
+ * Description:
+ *   Find the symbol in the symbol table with the matching name.
+ *   This version assumes that table is not ordered with respect to symbol
+ *   name and, hence, access time will be linear with respect to nsyms.
+ *
+ * Returned Value:
+ *   A reference to the symbol table entry if an entry with the matching
+ *   name is found; NULL is returned if the entry is not found.
+ *
+ ****************************************************************************/
+
+FAR const struct symtab_s *
+symtab_findbyname(FAR const struct symtab_s *symtab,
+                  FAR const char *name, int nsyms)
+{
+  DEBUGASSERT(symtab != NULL && name != NULL);
+  for (; nsyms > 0; symtab++, nsyms--)
+    {
+      if (strcmp(name, symtab->sym_name) == 0)
+        {
+          return symtab;
+        }
+    }
+  return NULL;
+}
+