[Xen-changelog] [xen-unstable] pygrub: Support GPT (GUID Partition Table) as used by EFI.

[Xen patchbot-unstable <patchbot-unstable@xxxxxxxxxxxxxxxxxxx>]

# HG changeset patch
# User kfraser@xxxxxxxxxxxxxxxxxxxxx
# Date 1176301634 -3600
# Node ID ed78f08aad6195810f2c8296dea43eb5e3ce87ab
# Parent  83e4261378e787c45133eb98459958c617e34ee7
pygrub: Support GPT (GUID Partition Table) as used by EFI.
Signed-off-by: Shinya Kuwamura <kuwa@xxxxxxxxxxxxxx>
Signed-off-by: Tomohiro Takahashi <takatom@xxxxxxxxxxxxxx>
---
 tools/pygrub/src/pygrub |    7 +++++++
 1 files changed, 7 insertions(+)

diff -r 83e4261378e7 -r ed78f08aad61 tools/pygrub/src/pygrub
--- a/tools/pygrub/src/pygrub   Wed Apr 11 15:17:17 2007 +0100
+++ b/tools/pygrub/src/pygrub   Wed Apr 11 15:27:14 2007 +0100
@@ -58,6 +58,13 @@ def get_active_partition(file):
         # active partition has 0x80 as the first byte
         if struct.unpack("<c", buf[poff:poff+1]) == ('\x80',):
             return buf[poff:poff+16]
+
+        # type=0xee: GUID partition table
+        # XXX assume the first partition is active
+        if struct.unpack("<c", buf[poff+4:poff+5]) == ('\xee',):
+            os.lseek(fd, 0x400, 0)
+            buf = os.read(fd, 512)
+            return buf[24:40] # XXX buf[32:40]
 
     # if there's not a partition marked as active, fall back to
     # the first partition

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