1 files changed, 101 insertions, 0 deletions
diff --git a/contrib/syslinux-4.02/gpxe/src/image/embedded.c b/contrib/syslinux-4.02/gpxe/src/image/embedded.c
new file mode 100644
index 0000000..58a14ea
--- /dev/null
+++ b/contrib/syslinux-4.02/gpxe/src/image/embedded.c
@@ -0,0 +1,101 @@
+/** @file
+ *
+ * Embedded image support
+ *
+ * Embedded images are images built into the gPXE binary and do not require
+ * fetching over the network.
+ */
+
+FILE_LICENCE ( GPL2_OR_LATER );
+
+#include <string.h>
+#include <gpxe/image.h>
+#include <gpxe/uaccess.h>
+#include <gpxe/init.h>
+
+/**
+ * Free embedded image
+ *
+ * @v refcnt		Reference counter
+ */
+static void __attribute__ (( unused ))
+embedded_image_free ( struct refcnt *refcnt __unused ) {
+	/* Do nothing */
+}
+
+/* Raw image data for all embedded images */
+#undef EMBED
+#define EMBED( _index, _path, _name )					\
+	extern char embedded_image_ ## _index ## _data[];		\
+	extern char embedded_image_ ## _index ## _len[];		\
+	__asm__ ( ".section \".rodata\", \"a\", @progbits\n\t"		\
+		  "\nembedded_image_" #_index "_data:\n\t"		\
+		  ".incbin \"" _path "\"\n\t"				\
+		  "\nembedded_image_" #_index "_end:\n\t"		\
+		  ".equ embedded_image_" #_index "_len, "		\
+			"( embedded_image_" #_index "_end - "		\
+			"  embedded_image_" #_index "_data )\n\t"	\
+		  ".previous\n\t" );
+EMBED_ALL
+
+/* Image structures for all embedded images */
+#undef EMBED
+#define EMBED( _index, _path, _name ) {					\
+	.refcnt = { .free = embedded_image_free, },			\
+	.name = _name,							\
+	.data = ( userptr_t ) ( embedded_image_ ## _index ## _data ),	\
+	.len = ( size_t ) embedded_image_ ## _index ## _len,		\
+},
+static struct image embedded_images[] = {
+	EMBED_ALL
+};
+
+/**
+ * Register all embedded images
+ */
+static void embedded_init ( void ) {
+	int i;
+	struct image *image;
+	void *data;
+	int rc;
+
+	/* Skip if we have no embedded images */
+	if ( ! sizeof ( embedded_images ) )
+		return;
+
+	/* Fix up data pointers and register images */
+	for ( i = 0 ; i < ( int ) ( sizeof ( embedded_images ) /
+				    sizeof ( embedded_images[0] ) ) ; i++ ) {
+		image = &embedded_images[i];
+
+		/* virt_to_user() cannot be used in a static
+		 * initialiser, so we cast the pointer to a userptr_t
+		 * in the initialiser and fix it up here.  (This will
+		 * actually be a no-op on most platforms.)
+		 */
+		data = ( ( void * ) image->data );
+		image->data = virt_to_user ( data );
+
+		DBG ( "Embedded image \"%s\": %zd bytes at %p\n",
+		      image->name, image->len, data );
+
+		if ( ( rc = register_image ( image ) ) != 0 ) {
+			DBG ( "Could not register embedded image \"%s\": "
+			      "%s\n", image->name, strerror ( rc ) );
+			return;
+		}
+	}
+
+	/* Load the first image */
+	image = &embedded_images[0];
+	if ( ( rc = image_autoload ( image ) ) != 0 ) {
+		DBG ( "Could not load embedded image \"%s\": %s\n",
+		      image->name, strerror ( rc ) );
+		return;
+	}
+}
+
+/** Embedded image initialisation function */
+struct init_fn embedded_init_fn __init_fn ( INIT_NORMAL ) = {
+	.initialise = embedded_init,
+};