Output application format files.

Added support for an RTEMS RAP format application file. The format is:

 <header>
 <LZ77>
  <Application Script>
  <[1..n] ELF Object files>
 </LZ77>

Where the header is a text string of fields delimited by ',' and terminated
with a line feed (\n). It is variable length:

  RTEMS-APP,0000000,01.00.00,LZ77,00000000\n\0

  where:
   RTEMS-APP     : file tag for quick acceptance and rejection
   Length        : the length of the application in bytes including the
                 : header
   Version       : Version of the application format.
   Compress      : The compression format.
   Checksum      : CCITT CRC32 checksum.

Following the header is a nul ('\0') character then an LZ77 container
with the application loader script followed by the ELF object files.

Note, the script format will be documented else where.

Note, the final version may add a 32bit length field before each part
in the compressed container to delimit the size of the file to be
read. This is currently not in this version.

2 files changed, 41 insertions, 7 deletions

diff --git a/linkers/rld-outputter.h b/linkers/rld-outputter.h
index a5e03c8..fa3ebb4 100644
--- a/linkers/rld-outputter.h
+++ b/linkers/rld-outputter.h
@@ -32,6 +32,16 @@ namespace rld
   namespace outputter
   {
     /**
+     * The types of output.
+     */
+    enum type
+    {
+      ot_script,
+      ot_archive,
+      ot_application
+    };
+
+    /**
      * Output the object file list as a string.
      *
      * @param dependents The list of dependent object files
@@ -42,7 +52,8 @@ namespace rld
     std::string script_text (rld::files::object_list& dependents,
                              rld::files::cache&       cache);
     /**
-     * Output the object file list as a script.
+     * Output the object files as an archive format file with the metadata as
+     * the first ELF file.
      *
      * @param name The name of the archive.
      * @param dependents The list of dependent object files
@@ -64,6 +75,19 @@ namespace rld
     void script (const std::string&       name,
                  rld::files::object_list& dependents,
                  rld::files::cache&       cache);
+
+    /**
+     * Output the object files as a compressed list of files.
+     *
+     * @param name The name of the script.
+     * @param dependents The list of dependent object files
+     * @param cache The file cache for the link. Includes the object list
+     *              the user requested.
+     */
+    void application (const std::string&  name,
+                      files::object_list& dependents,
+                      files::cache&       cache);
+
   }
 }
 
diff --git a/linkers/rtems-ld.cpp b/linkers/rtems-ld.cpp
index 54e9987..66ac235 100644
--- a/linkers/rtems-ld.cpp
+++ b/linkers/rtems-ld.cpp
@@ -170,7 +170,7 @@ main (int argc, char* argv[])
     std::string          output = "a.out";
     std::string          base_name;
     std::string          cc_name;
-    bool                 script = false;
+    rld::outputter::type output_type = rld::outputter::ot_application;
     bool                 standard_libs = true;
     bool                 exec_prefix_set = false;
     bool                 map = false;
@@ -211,7 +211,7 @@ main (int argc, char* argv[])
           break;
 
         case 'S':
-          script = true;
+          output_type = rld::outputter::ot_script;
           break;
 
         case 'l':
@@ -385,10 +385,20 @@ main (int argc, char* argv[])
       /**
        * Output the file.
        */
-      if (script)
-        rld::outputter::script (output, dependents, cache);
-      else
-        rld::outputter::archive (output, dependents, cache);
+      switch (output_type)
+      {
+        case rld::outputter::ot_script:
+          rld::outputter::script (output, dependents, cache);
+          break;
+        case rld::outputter::ot_archive:
+          rld::outputter::archive (output, dependents, cache);
+          break;
+        case rld::outputter::ot_application:
+          rld::outputter::application (output, dependents, cache);
+          break;
+        default:
+          throw rld::error ("invalid output type", "output");
+      }
 
       /**
        * Check for warnings.