1 files changed, 127 insertions, 0 deletions
diff --git a/lib/execute.c b/lib/execute.c
new file mode 100644
index 00000000..89328c68
--- /dev/null
+++ b/lib/execute.c
@@ -0,0 +1,127 @@
+/*
+ * Copyright 2012 <James.Bottomley@HansenPartnership.com>
+ *
+ * see COPYING file
+ *
+ * --
+ *
+ * generate_path is a cut and paste from
+ *  
+ *   git://github.com/mjg59/shim.git
+ *
+ * Code Copyright 2012 Red Hat, Inc <mjg@redhat.com>
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ *
+ * 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.
+ *
+ * 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 HOLDER 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.
+ *
+ */
+
+#include <efi.h>
+#include <efilib.h>
+
+#include <guid.h>
+#include <execute.h>
+
+EFI_STATUS
+generate_path(CHAR16* name, EFI_LOADED_IMAGE *li, EFI_DEVICE_PATH **path, CHAR16 **PathName)
+{
+	unsigned int pathlen;
+	EFI_STATUS efi_status = EFI_SUCCESS;
+	CHAR16 *devpathstr = DevicePathToStr(li->FilePath),
+		*found = NULL;
+	unsigned int i;
+
+	for (i = 0; i < StrLen(devpathstr); i++) {
+		if (devpathstr[i] == '/')
+			devpathstr[i] = '\\';
+		if (devpathstr[i] == '\\')
+			found = &devpathstr[i];
+	}
+	if (!found) {
+		pathlen = 0;
+	} else {
+		while (*(found - 1) == '\\')
+			--found;
+		*found = '\0';
+		pathlen = StrLen(devpathstr);
+	}
+
+	if (name[0] != '\\')
+		pathlen++;
+
+	*PathName = AllocatePool((pathlen + 1 + StrLen(name))*sizeof(CHAR16));
+
+	if (!*PathName) {
+		Print(L"Failed to allocate path buffer\n");
+		efi_status = EFI_OUT_OF_RESOURCES;
+		goto error;
+	}
+
+	StrCpy(*PathName, devpathstr);
+
+	if (name[0] != '\\')
+		StrCat(*PathName, L"\\");
+	StrCat(*PathName, name);
+	
+	*path = FileDevicePath(li->DeviceHandle, *PathName);
+
+error:
+	FreePool(devpathstr);
+
+	return efi_status;
+}
+
+EFI_STATUS
+execute(EFI_HANDLE image, CHAR16 *name)
+{
+	EFI_STATUS status;
+	EFI_HANDLE h;
+	EFI_LOADED_IMAGE *li;
+	EFI_DEVICE_PATH *devpath;
+	CHAR16 *PathName;
+
+	status = uefi_call_wrapper(BS->HandleProtocol, 3, image,
+				   &IMAGE_PROTOCOL, (void **)&li);
+	if (status != EFI_SUCCESS)
+		return status;
+
+	
+	status = generate_path(name, li, &devpath, &PathName);
+	if (status != EFI_SUCCESS)
+		return status;
+
+	status = uefi_call_wrapper(BS->LoadImage, 6, FALSE, image,
+				   devpath, NULL, 0, &h);
+	if (status != EFI_SUCCESS)
+		goto out;
+	
+	status = uefi_call_wrapper(BS->StartImage, 3, h, NULL, NULL);
+	uefi_call_wrapper(BS->UnloadImage, 1, h);
+
+ out:
+	FreePool(PathName);
+	FreePool(devpath);
+	return status;
+}