Place command-line inline, to save on memory allocation hassles.

src/arch/i386/image/multiboot.c

 		module->mod_start = user_to_phys ( module_image->data, 0 );
 		module->mod_end = user_to_phys ( module_image->data,
 						 module_image->len );
-		if ( image->cmdline )
-			module->string = virt_to_phys ( image->cmdline );
+		module->string = virt_to_phys ( image->cmdline );
 
 		/* We promise to page-align modules, so at least check */
 		assert ( ( module->mod_start & 0xfff ) == 0 );
 	mbinfo.mmap_addr = virt_to_phys ( &mbmemmap[0].base_addr );
 	mbinfo.flags |= ( MBI_FLAG_MEM | MBI_FLAG_MMAP );
 
-	/* Set command line, if present */
-	if ( image->cmdline ) {
-		mbinfo.cmdline = virt_to_phys ( image->cmdline );
-		mbinfo.flags |= MBI_FLAG_CMDLINE;
-	}
+	/* Set command line */
+	mbinfo.cmdline = virt_to_phys ( image->cmdline );
+	mbinfo.flags |= MBI_FLAG_CMDLINE;
 
 	/* Construct module list */
 	num_modules = multiboot_build_module_list ( image, NULL );

src/include/gpxe/image.h

 
 struct image_type;
 
+/** Maximum length of a command line */
+#define CMDLINE_MAX 128
+
 /** An executable or loadable image */
 struct image {
 	/** Name */
 	struct list_head list;
 
 	/** Command line to pass to image */
-	const char *cmdline;
+	char cmdline[CMDLINE_MAX];
 
 	/** Raw file image */
 	userptr_t data;
 	/** Length of raw file image */
 	size_t len;
+	/**
+	 * Free raw file image
+	 *
+	 * @v data		Raw file image
+	 *
+	 * Call this method before freeing up the @c struct @c image.
+	 */
+	void ( * free ) ( userptr_t data );
 
 	/** Entry point */
 	physaddr_t entry;