refactor(flasher_stub): Include stubs as json, do not embed in code

MANIFEST.in

@@ -1,5 +1,6 @@
 include README.md
 include LICENSE
+include esptool/targets/stub_flasher/*.json
 # sdist includes test/test*.py by default, but esptool.py tests
 # are so far only intended to run from the git repo itself
 prune test

esptool/loader.py

@@ -3,8 +3,10 @@
 #
 # SPDX-License-Identifier: GPL-2.0-or-later
 
+import base64
 import hashlib
 import itertools
+import json
 import os
 import re
 import string
@@ -72,6 +74,14 @@
 DEFAULT_SERIAL_WRITE_TIMEOUT = 10  # timeout for serial port write
 DEFAULT_CONNECT_ATTEMPTS = 7  # default number of times to try connection
 
+STUBS_DIR = os.path.join(os.path.dirname(__file__), "./targets/stub_flasher/")
+
+
+def get_stub_json_path(chip_name):
+    chip_name = re.sub(r"[-()]", "", chip_name.lower())
+    chip_name = chip_name.replace("esp", "")
+    return STUBS_DIR + "stub_flasher_" + chip_name + ".json"
+
 
 def timeout_per_mb(seconds_per_mb, size_bytes):
     """Scales timeouts which are size-specific"""
@@ -121,6 +131,23 @@ def esp32s3_or_newer_function_only(func):
     )
 
 
+class StubFlasher:
+    def __init__(self, json_path):
+        with open(json_path) as json_file:
+            stub = json.load(json_file)
+
+        self.text = base64.b64decode(stub["text"])
+        self.text_start = stub["text_start"]
+        self.entry = stub["entry"]
+
+        try:
+            self.data = base64.b64decode(stub["data"])
+            self.data_start = stub["data_start"]
+        except KeyError:
+            self.data = None
+            self.data_start = None
+
+
 class ESPLoader(object):
     """Base class providing access to ESP ROM & software stub bootloaders.
     Subclasses provide ESP8266 & ESP32 Family specific functionality.
@@ -698,12 +725,12 @@ def mem_begin(self, size, blocks, blocksize, offset):
         """Start downloading an application image to RAM"""
         # check we're not going to overwrite a running stub with this data
         if self.IS_STUB:
-            stub = self.STUB_CODE
+            stub = StubFlasher(get_stub_json_path(self.CHIP_NAME))
             load_start = offset
             load_end = offset + size
             for (start, end) in [
-                (stub["data_start"], stub["data_start"] + len(stub["data"])),
-                (stub["text_start"], stub["text_start"] + len(stub["text"])),
+                (stub.data_start, stub.data_start + len(stub.data)),
+                (stub.text_start, stub.text_start + len(stub.text)),
             ]:
                 if load_start < end and load_end > start:
                     raise FatalError(
@@ -861,26 +888,26 @@ def parse_flash_freq_arg(cls, arg):
 
     def run_stub(self, stub=None):
         if stub is None:
-            stub = self.STUB_CODE
+            stub = StubFlasher(get_stub_json_path(self.CHIP_NAME))
 
         if self.sync_stub_detected:
             print("Stub is already running. No upload is necessary.")
             return self.STUB_CLASS(self)
 
         # Upload
         print("Uploading stub...")
-        for field in ["text", "data"]:
-            if field in stub:
-                offs = stub[field + "_start"]
-                length = len(stub[field])
+        for field in [stub.text, stub.data]:
+            if field is not None:
+                offs = stub.text_start if field == stub.text else stub.data_start
+                length = len(field)
                 blocks = (length + self.ESP_RAM_BLOCK - 1) // self.ESP_RAM_BLOCK
                 self.mem_begin(length, blocks, self.ESP_RAM_BLOCK, offs)
                 for seq in range(blocks):
                     from_offs = seq * self.ESP_RAM_BLOCK
                     to_offs = from_offs + self.ESP_RAM_BLOCK
-                    self.mem_block(stub[field][from_offs:to_offs], seq)
+                    self.mem_block(field[from_offs:to_offs], seq)
         print("Running stub...")
-        self.mem_finish(stub["entry"])
+        self.mem_finish(stub.entry)
 
         p = self.read()
         if p != b"OHAI":

esptool/targets/esp32.py

@@ -6,7 +6,6 @@
 import struct
 
 from ..loader import ESPLoader
-from ..stub_flasher import ESP32StubCode
 from ..util import FatalError, NotSupportedError
 
 
@@ -17,8 +16,6 @@ class ESP32ROM(ESPLoader):
     IMAGE_CHIP_ID = 0
     IS_STUB = False
 
-    STUB_CODE = ESP32StubCode
-
     FPGA_SLOW_BOOT = True
 
     CHIP_DETECT_MAGIC_VALUE = [0x00F01D83]

esptool/targets/esp32c2.py

@@ -8,15 +8,12 @@
 
 from .esp32c3 import ESP32C3ROM
 from ..loader import ESPLoader
-from ..stub_flasher import ESP32C2StubCode
 
 
 class ESP32C2ROM(ESP32C3ROM):
     CHIP_NAME = "ESP32-C2"
     IMAGE_CHIP_ID = 12
 
-    STUB_CODE = ESP32C2StubCode
-
     IROM_MAP_START = 0x42000000
     IROM_MAP_END = 0x42400000
     DROM_MAP_START = 0x3C000000

esptool/targets/esp32c3.py

@@ -6,16 +6,13 @@
 import struct
 
 from .esp32 import ESP32ROM
-from ..stub_flasher import ESP32C3StubCode
 from ..util import FatalError, NotImplementedInROMError
 
 
 class ESP32C3ROM(ESP32ROM):
     CHIP_NAME = "ESP32-C3"
     IMAGE_CHIP_ID = 5
 
-    STUB_CODE = ESP32C3StubCode
-
     FPGA_SLOW_BOOT = False
 
     IROM_MAP_START = 0x42000000

esptool/targets/esp32c6beta.py

@@ -4,7 +4,6 @@
 # SPDX-License-Identifier: GPL-2.0-or-later
 
 from .esp32c3 import ESP32C3ROM
-from ..stub_flasher import ESP32C6BETAStubCode
 
 
 class ESP32C6BETAROM(ESP32C3ROM):
@@ -13,8 +12,6 @@ class ESP32C6BETAROM(ESP32C3ROM):
 
     CHIP_DETECT_MAGIC_VALUE = [0x0DA1806F]
 
-    STUB_CODE = ESP32C6BETAStubCode
-
     UART_DATE_REG_ADDR = 0x00000500
 
     def get_chip_description(self):

esptool/targets/esp32h2beta1.py

@@ -6,16 +6,13 @@
 import struct
 
 from .esp32 import ESP32ROM
-from ..stub_flasher import ESP32H2BETA1StubCode
 from ..util import FatalError, NotImplementedInROMError
 
 
 class ESP32H2BETA1ROM(ESP32ROM):
     CHIP_NAME = "ESP32-H2(beta1)"
     IMAGE_CHIP_ID = 10
 
-    STUB_CODE = ESP32H2BETA1StubCode
-
     IROM_MAP_START = 0x42000000
     IROM_MAP_END = 0x42800000
     DROM_MAP_START = 0x3C000000

esptool/targets/esp32h2beta2.py

@@ -4,15 +4,12 @@
 # SPDX-License-Identifier: GPL-2.0-or-later
 
 from .esp32h2beta1 import ESP32H2BETA1ROM
-from ..stub_flasher import ESP32H2BETA2StubCode
 
 
 class ESP32H2BETA2ROM(ESP32H2BETA1ROM):
     CHIP_NAME = "ESP32-H2(beta2)"
     IMAGE_CHIP_ID = 14
 
-    STUB_CODE = ESP32H2BETA2StubCode
-
     CHIP_DETECT_MAGIC_VALUE = [0x6881B06F]
 
     def get_chip_description(self):

esptool/targets/esp32s2.py

@@ -8,16 +8,13 @@
 import time
 
 from .esp32 import ESP32ROM
-from ..stub_flasher import ESP32S2StubCode
 from ..util import FatalError, NotImplementedInROMError
 
 
 class ESP32S2ROM(ESP32ROM):
     CHIP_NAME = "ESP32-S2"
     IMAGE_CHIP_ID = 2
 
-    STUB_CODE = ESP32S2StubCode
-
     FPGA_SLOW_BOOT = False
 
     IROM_MAP_START = 0x40080000

esptool/targets/esp32s3.py

@@ -8,7 +8,6 @@
 import time
 
 from .esp32 import ESP32ROM
-from ..stub_flasher import ESP32S3StubCode
 from ..util import FatalError, NotImplementedInROMError
 
 
@@ -19,8 +18,6 @@ class ESP32S3ROM(ESP32ROM):
 
     CHIP_DETECT_MAGIC_VALUE = [0x9]
 
-    STUB_CODE = ESP32S3StubCode
-
     FPGA_SLOW_BOOT = False
 
     IROM_MAP_START = 0x42000000

esptool/targets/esp32s3beta2.py

@@ -4,7 +4,6 @@
 # SPDX-License-Identifier: GPL-2.0-or-later
 
 from .esp32s3 import ESP32S3ROM
-from ..stub_flasher import ESP32S3BETA2StubCode
 
 
 class ESP32S3BETA2ROM(ESP32S3ROM):
@@ -13,8 +12,6 @@ class ESP32S3BETA2ROM(ESP32S3ROM):
 
     CHIP_DETECT_MAGIC_VALUE = [0xEB004136]
 
-    STUB_CODE = ESP32S3BETA2StubCode
-
     EFUSE_BASE = 0x6001A000  # BLOCK0 read base address
 
     def get_chip_description(self):

esptool/targets/esp8266.py

@@ -4,7 +4,6 @@
 # SPDX-License-Identifier: GPL-2.0-or-later
 
 from ..loader import ESPLoader
-from ..stub_flasher import ESP8266StubCode
 from ..util import FatalError, NotImplementedInROMError
 
 
@@ -14,8 +13,6 @@ class ESP8266ROM(ESPLoader):
     CHIP_NAME = "ESP8266"
     IS_STUB = False
 
-    STUB_CODE = ESP8266StubCode
-
     CHIP_DETECT_MAGIC_VALUE = [0xFFF0C101]
 
     # OTP ROM addresses

esptool/targets/stub_flasher/stub_flasher_32.json

@@ -0,0 +1,7 @@
+{
+    "entry": 1074521516,
+    "text": "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",
+    "text_start": 1074520064,
+    "data": "CMD8Pw==",
+    "data_start": 1073605544
+}

esptool/targets/stub_flasher/stub_flasher_32c2.json

@@ -0,0 +1,7 @@
+{
+    "entry": 1077413328,
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