Changeset 33c058d3 in mainline

Timestamp:

2008-05-29T00:20:06Z (17 years ago)

Author:

Martin Decky <martin@…>

Branches:

lfn, master, serial, ticket/834-toolchain-update, topic/msim-upgrade, topic/simplify-dev-export

Children:

e19d667

Parents:

ff48a15

Message:

add support for page size alignment

File:

• tools/mktmpfs.py (modified) (2 diffs)

tools/mktmpfs.py

@@ -35 +35 @@
 import struct
 
+def align_up(size, alignment):
+        return (((size) + ((alignment) - 1)) & ~((alignment) - 1))
+
 def usage(prname):
         "Print usage syntax"
-        print prname + " <PATH> <IMAGE>"
+        print prname + " <ALIGNMENT> <PATH> <IMAGE>"
 
 def main():
-        if (len(sys.argv) < 3):
+        if (len(sys.argv) < 4):
                 usage(sys.argv[0])
                 return
         
-        path = os.path.abspath(sys.argv[1]);
+        if (not sys.argv[1].isdigit()):
+                print "<ALIGNMENT> must be a number"
+                return
+        
+        align = int(sys.argv[1], 0)
+        path = os.path.abspath(sys.argv[2])
         if (not os.path.isdir(path)):
                 print "<PATH> must be a directory"
                 return
         
-        header_size = 18
+        header_size = align_up(18, align)
         payload_size = 0
-        outf = file(sys.argv[2], "w")
+        outf = file(sys.argv[3], "w")
         outf.write(struct.pack("<" + ("%d" % header_size) + "x"))
         
@@ -80 +88 @@
                         payload_size += 5 + len(canon)
         
+        aligned_size = align_up(payload_size, align)
+        
+        if (aligned_size - payload_size > 0):
+                outf.write(struct.pack("<" + ("%d" % (aligned_size - payload_size)) + "x"))
+        
         outf.seek(0)
-        outf.write(struct.pack("<4sBBLQ", "HORD", 1, 1, header_size, payload_size))
+        outf.write(struct.pack("<4sBBLQ", "HORD", 1, 1, header_size, aligned_size))
         outf.close()