shim/shim-bnc804631-fix-broken-bootpath.patch

From 6b70850baa958b196ec332cf0224ffa9d5a81f5f Mon Sep 17 00:00:00 2001
From: Gary Ching-Pang Lin <glin@suse.com>
Date: Thu, 21 Feb 2013 17:49:29 +0800
Subject: [PATCH] Fix the broken bootpath

- The file path from DevicePathToStr may use slash as the file
  seperator. Change all slashes to backslashes to avoid the strange
  bootpath.
- Remove the redundant backslashes.
- ImagePath no longer requires the leading backslash.
- Fix a memory leak

Based on the patch from Michal Marek <mmarek@suse.com>
---
 shim.c |   22 +++++++++++++++++-----
 1 file changed, 17 insertions(+), 5 deletions(-)

diff --git a/shim.c b/shim.c
index 37a5898..690d064 100644
--- a/shim.c
+++ b/shim.c
@@ -919,15 +919,25 @@ static EFI_STATUS generate_path(EFI_LOADED_IMAGE *li, CHAR16 *ImagePath,
 
 	pathlen = StrLen(bootpath);
 
+	/*
+	 * DevicePathToStr() concatenates two nodes with '/'.
+	 * Convert '/' to '\\'.
+	 */
+	for (i = 0; i < pathlen; i++) {
+		if (bootpath[i] == '/')
+			bootpath[i] = '\\';
+	}
 	for (i=pathlen; i>0; i--) {
-		if (bootpath[i] == '\\')
+		if (bootpath[i] == '\\' && bootpath[i-1] != '\\')
 			break;
 	}
+	if (bootpath[i] == '\\')
+		bootpath[i+1] = '\0';
+	else
+		bootpath[0] = '\0';
 
-	bootpath[i+1] = '\0';
-
-	if (i == 0 || bootpath[i-i] == '\\')
-		bootpath[i] = '\0';
+	while (*ImagePath == '\\')
+		ImagePath++;
 
 	*PathName = AllocatePool(StrSize(bootpath) + StrSize(ImagePath));
 
@@ -944,6 +954,8 @@ static EFI_STATUS generate_path(EFI_LOADED_IMAGE *li, CHAR16 *ImagePath,
 	*grubpath = FileDevicePath(device, *PathName);
 
 error:
+	FreePool(bootpath);
+
 	return efi_status;
 }
 
-- 
1.7.10.4