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Squashed 'tmk_core/' changes from 7967731..b9e0ea0

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b9e0ea0 Merge commit '7fa9d8bdea3773d1195b04d98fcf27cf48ddd81d' as 'tool/mbed/mbed-sdk'
7fa9d8b Squashed 'tool/mbed/mbed-sdk/' content from commit 7c21ce5

git-subtree-dir: tmk_core
git-subtree-split: b9e0ea08cb940de20b3610ecdda18e9d8cd7c552
This commit is contained in:
Jun Wako 2015-04-24 16:26:14 +09:00
parent a20ef7052c
commit 1fe4406f37
4198 changed files with 2016457 additions and 0 deletions
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tool/mbed/mbed-sdk/workspace_tools/patch.py Normal file
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"""
mbed SDK
Copyright (c) 2011-2013 ARM Limited
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
http://www.nxp.com/documents/user_manual/UM10360.pdf
32.3.1.1 Criterion for Valid User Code
The reserved Cortex-M3 exception vector location 7 (offset 0x1C in the vector table)
should contain the 2's complement of the check-sum of table entries 0 through 6. This
causes the checksum of the first 8 table entries to be 0. The boot loader code checksums
the first 8 locations in sector 0 of the flash. If the result is 0, then execution control is
transferred to the user code.
"""
from struct import unpack, pack
def patch(bin_path):
with open(bin_path, 'r+b') as bin:
# Read entries 0 through 6 (Little Endian 32bits words)
vector = [unpack('<I', bin.read(4))[0] for _ in range(7)]
# location 7 (offset 0x1C in the vector table) should contain the 2's
# complement of the check-sum of table entries 0 through 6
bin.seek(0x1C)
bin.write(pack('<I', (~sum(vector) + 1) & 0xFFFFFFFF))
def is_patched(bin_path):
with open(bin_path, 'rb') as bin:
# The checksum of the first 8 table entries should be 0
return (sum([unpack('<I', bin.read(4))[0] for _ in range(8)]) & 0xFFFFFFFF) == 0
if __name__ == '__main__':
bin_path = "C:/Users/emimon01/releases/emilmont/build/test/LPC1768/ARM/MBED_A1/basic.bin"
patch(bin_path)
assert is_patched(bin_path), "The file is not patched"