Added the embedded pxelinux payload patch from hpa.

src/Makefile

@@ -101,6 +101,10 @@ CFLAGS		+= $(EXTRA_CFLAGS)
 ASFLAGS		+= $(EXTRA_ASFLAGS)
 LDFLAGS		+= $(EXTRA_LDFLAGS)
 
+# Embedded image, if present
+#
+EMBEDDED_IMAGE	?= /dev/null
+
 ifneq ($(NO_WERROR),1)
 CFLAGS		+= -Werror
 endif

src/Makefile.housekeeping

@@ -214,6 +214,14 @@ drivers :
 roms :
 	@$(ECHO) $(ROMS)
 
+# Embedded binary
+$(BIN)/embedimg.bin: $(EMBEDDED_IMAGE)
+	$(QM)$(ECHO) "  [COPY] $@"
+	$(Q)$(CP) -f $(EMBEDDED_IMAGE) $@
+
+$(BIN)/embed.o: $(BIN)/embedimg.bin
+CFLAGS_embed = -DEMBEDIMG=\"$(BIN)/embedimg.bin\"
+
 # Generate the NIC file from the parsed source files.  The NIC file is
 # only for rom-o-matic.
 #

src/image/embed.S

@@ -0,0 +1,7 @@
+	.section ".data", "aw"
+	.balign 4
+	.globl _embedded_image_start
+_embedded_image_start:
+	.incbin EMBEDIMG
+	.globl _embedded_image_end
+_embedded_image_end:

src/image/embedded.c

@@ -0,0 +1,49 @@
+/** @file
+ *
+ * Take a possible embedded image and put it in a struct image
+ * data structure.
+ */
+
+#include <stdio.h>
+#include <gpxe/image.h>
+#include <gpxe/malloc.h>
+#include <gpxe/uaccess.h>
+#include <gpxe/umalloc.h>
+#include <gpxe/embedded.h>
+
+extern char _embedded_image_start[], _embedded_image_end[];
+
+struct image *embedded_image(void)
+{
+	static int reclaimed = 0;
+	struct image *image;
+	size_t eisize = _embedded_image_end - _embedded_image_start;
+
+	if ( !eisize )
+		return NULL;	/* No embedded image */
+
+	if ( reclaimed )
+		return NULL;	/* Already reclaimed */
+
+	printf("Embedded image: %d bytes at %p\n",
+	       eisize, _embedded_image_start);
+
+	image = alloc_image();
+	if (!image)
+		return NULL;
+
+	image->len     = eisize;
+	image->data    = umalloc(eisize);
+	if (image->data == UNULL) {
+		image_put(image);
+		return image = NULL;
+	}
+	copy_to_user(image->data, 0, _embedded_image_start, eisize);
+
+	/* Reclaim embedded image memory */
+	reclaimed = 1;
+	mpopulate(_embedded_image_start, eisize);
+
+	return image;
+}
+

src/include/gpxe/embedded.h

@@ -0,0 +1,9 @@
+#ifndef _GPXE_EMBEDDED_H
+#define _GPXE_EMBEDDED_H
+
+#include <gpxe/image.h>
+
+struct image *embedded_image(void);
+
+#endif
+

src/usr/autoboot.c

@@ -22,6 +22,7 @@
 #include <gpxe/netdevice.h>
 #include <gpxe/dhcp.h>
 #include <gpxe/image.h>
+#include <gpxe/embedded.h>
 #include <usr/ifmgmt.h>
 #include <usr/route.h>
 #include <usr/dhcpmgmt.h>
@@ -45,6 +46,30 @@ static struct net_device * find_boot_netdev ( void ) {
 	return NULL;
 }
 
+/**
+ * Boot embedded image
+ *
+ * @ret rc		Return status code
+ */
+static int boot_embedded_image ( void ) {
+	struct image *image;
+	int rc;
+
+	image = embedded_image();
+	if ( !image )
+		return ENOENT;
+
+	if ( ( rc = imgload ( image ) ) != 0 ) {
+		printf ( "Could not load embedded image: %s\n",
+			 strerror ( rc ) );
+	} else if ( ( rc = imgexec ( image ) ) != 0 ) {
+		printf ( "Could not boot embedded image: %s\n",
+			 strerror ( rc ) );
+	}
+	image_put ( image );
+	return rc;
+}
+
 /**
  * Boot using filename
  *
@@ -115,6 +140,11 @@ static int netboot ( struct net_device *netdev ) {
 		return rc;
 	route();
 
+	/* Try to boot an embedded image if we have one */
+	rc = boot_embedded_image ();
+	if ( rc != ENOENT )
+		return rc;
+
 	/* Try to download and boot whatever we are given as a filename */
 	dhcp_snprintf ( buf, sizeof ( buf ),
 			find_global_dhcp_option ( DHCP_BOOTFILE_NAME ) );