Git-Mirrors/portapack-mayhem
1
0
Fork 0
mirror of https://github.com/eried/portapack-mayhem.git synced 2025-07-29 17:49:14 -04:00
Code Issues Projects Releases Packages Wiki Activity

Warning for shared external code during build (#1881)

Browse source
This commit is contained in:
Mark Thompson 2024-02-11 14:25:00 -06:00 • committed by GitHub
parent 6a8650d484
commit 0f6a9277a8
No known key found for this signature in database
GPG key ID: B5690EEEBB952194
6 changed files with 131 additions and 37 deletions
Download patch file Download diff file Expand all files Collapse all files

12
firmware/tools/make_spi_image.py
View file

@ -2,6 +2,7 @@
#
# Copyright (C) 2015 Jared Boone, ShareBrained Technology, Inc.
# Copyright (C) 2024 Mark Thompson
#
# This file is part of PortaPack.
#
@ -22,6 +23,9 @@
#
import sys
from external_app_info import maximum_application_size
from external_app_info import external_apps_address_start
from external_app_info import external_apps_address_end
usage_message = """
PortaPack SPI flash image generator
@ -81,10 +85,14 @@ pad_size = spi_size - 4 - len(spi_image)
for i in range(pad_size):
spi_image += spi_image_default_byte
# quick "add up the words" checksum:
# quick "add up the words" checksum, and check for possible references to code in external apps
checksum = 0
for i in range(0, len(spi_image), 4):
checksum += (spi_image[i] + (spi_image[i + 1] << 8) + (spi_image[i + 2] << 16) + (spi_image[i + 3] << 24))
snippet = spi_image[i:i+4]
val = int.from_bytes(snippet, byteorder='little')
checksum += val
if (val >= external_apps_address_start) and (val < external_apps_address_end) and ((val & 0xFFFF) < maximum_application_size) and ((val & 0x3)==0):
print ("WARNING: External code address", hex(val), "at offset", hex(i), "in", sys.argv[3])
final_checksum = 0
checksum = (final_checksum - checksum) & 0xFFFFFFFF