mirror of https://github.com/acidanthera/audk.git
105 lines
3.0 KiB
Python
105 lines
3.0 KiB
Python
## @file
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# Apply fixup to VTF binary image for FFS Raw section
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#
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# Copyright (c) 2014, Intel Corporation. All rights reserved.<BR>
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#
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# SPDX-License-Identifier: BSD-2-Clause-Patent
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#
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import sys
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filename = sys.argv[1]
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if filename.lower().find('ia32') >= 0:
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d = open(sys.argv[1], 'rb').read()
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c = ((len(d) + 4 + 7) & ~7) - 4
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if c > len(d):
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c -= len(d)
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f = open(sys.argv[1], 'wb')
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f.write('\x90' * c)
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f.write(d)
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f.close()
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else:
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from struct import pack
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PAGE_PRESENT = 0x01
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PAGE_READ_WRITE = 0x02
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PAGE_USER_SUPERVISOR = 0x04
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PAGE_WRITE_THROUGH = 0x08
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PAGE_CACHE_DISABLE = 0x010
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PAGE_ACCESSED = 0x020
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PAGE_DIRTY = 0x040
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PAGE_PAT = 0x080
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PAGE_GLOBAL = 0x0100
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PAGE_2M_MBO = 0x080
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PAGE_2M_PAT = 0x01000
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def NopAlign4k(s):
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c = ((len(s) + 0xfff) & ~0xfff) - len(s)
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return ('\x90' * c) + s
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def PageDirectoryEntries4GbOf2MbPages(baseAddress):
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s = ''
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for i in range(0x800):
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i = (
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baseAddress + long(i << 21) +
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PAGE_2M_MBO +
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PAGE_CACHE_DISABLE +
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PAGE_ACCESSED +
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PAGE_DIRTY +
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PAGE_READ_WRITE +
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PAGE_PRESENT
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)
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s += pack('Q', i)
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return s
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def PageDirectoryPointerTable4GbOf2MbPages(pdeBase):
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s = ''
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for i in range(0x200):
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i = (
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pdeBase +
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(min(i, 3) << 12) +
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PAGE_CACHE_DISABLE +
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PAGE_ACCESSED +
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PAGE_READ_WRITE +
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PAGE_PRESENT
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)
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s += pack('Q', i)
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return s
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def PageMapLevel4Table4GbOf2MbPages(pdptBase):
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s = ''
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for i in range(0x200):
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i = (
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pdptBase +
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(min(i, 0) << 12) +
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PAGE_CACHE_DISABLE +
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PAGE_ACCESSED +
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PAGE_READ_WRITE +
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PAGE_PRESENT
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)
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s += pack('Q', i)
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return s
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def First4GbPageEntries(topAddress):
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PDE = PageDirectoryEntries4GbOf2MbPages(0L)
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pml4tBase = topAddress - 0x1000
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pdptBase = pml4tBase - 0x1000
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pdeBase = pdptBase - len(PDE)
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PDPT = PageDirectoryPointerTable4GbOf2MbPages(pdeBase)
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PML4T = PageMapLevel4Table4GbOf2MbPages(pdptBase)
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return PDE + PDPT + PML4T
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def AlignAndAddPageTables():
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d = open(sys.argv[1], 'rb').read()
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code = NopAlign4k(d)
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topAddress = 0x100000000 - len(code)
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d = ('\x90' * 4) + First4GbPageEntries(topAddress) + code
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f = open(sys.argv[1], 'wb')
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f.write(d)
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f.close()
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AlignAndAddPageTables()
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