mirror of
https://github.com/MCKero6423/uv-k5-v3-emulator.git
synced 2026-10-02 03:15:36 +00:00
mckero
1e9fdf685c
The page was told --frame-addr 0x200012BE --status-addr 0x2000163E and used them as a fallback. The firmware the user actually flashed keeps its buffers at 0x2000129E/0x2000161E, 32 bytes earlier, so every line landed 32 bytes off: that is the "other firmware looks shifted" report. The images here are minimal ELFs with no symbol table, so there is nothing to read -- but the firmware's own buffers hold the same bytes the controller holds, and tools/uvk5_buffers.py finds them by matching (1024/1024 bytes for that file). The two address flags are optional now, work/run-webui.ps1 passes no machine-specific values at all, and the page reports what it found in /api/status and /api/panel. tools/uvk5_testenv.qemu() also looks in the sibling qemu-7.2/build the rest of the repo assumes. Fixed /api/panel's emulator-off branch, which called jsonify with both a dict and kwargs and 500'd. Tests: test_uvk5_buffers (the search must count matches, not pairs -- its first version scored every offset full marks and always answered the first one).
88 lines
3.8 KiB
Python
88 lines
3.8 KiB
Python
#!/usr/bin/env python3
|
|
"""The buffer search must count *matches*, not just bytes compared.
|
|
|
|
Its first version summed one per zipped pair and forgot `if a == b`, so every
|
|
offset scored the full total and the search always answered "the first offset" --
|
|
which looked like a working discovery and pointed the fallback at whatever happened
|
|
to sit at the start of SRAM. These tests use synthetic memory, so they need no
|
|
emulator and fail on that code.
|
|
"""
|
|
import struct
|
|
import unittest
|
|
|
|
import uvk5_buffers
|
|
from uvk5_lcd import FRAME_BYTES, STATUS_BYTES
|
|
|
|
|
|
def panel_memory(seed=1):
|
|
"""A controller memory with a recognisable, non-repeating-ish pattern."""
|
|
frame = bytes(((i * 13) + seed) & 0xFF for i in range(FRAME_BYTES))
|
|
status = bytes(((i * 29) + seed) & 0xFF for i in range(STATUS_BYTES))
|
|
return status + frame # the panel's order: the status page comes first
|
|
|
|
|
|
class TestLocate(unittest.TestCase):
|
|
def test_it_finds_the_buffers_where_they_are(self):
|
|
gram = panel_memory()
|
|
pad = 0x1234
|
|
# In SRAM the frame comes first and the status line follows it.
|
|
sram = bytes(pad) + gram[STATUS_BYTES:] + gram[:STATUS_BYTES] + bytes(0x100)
|
|
|
|
frame, status, best, total = uvk5_buffers.locate(sram, gram)
|
|
|
|
self.assertEqual(frame, uvk5_buffers.SRAM_BASE + pad)
|
|
self.assertEqual(status, uvk5_buffers.SRAM_BASE + pad + FRAME_BYTES)
|
|
self.assertEqual(best, total, "a perfect match must score the whole window")
|
|
self.assertEqual(total, FRAME_BYTES + STATUS_BYTES)
|
|
|
|
def test_a_single_match_does_not_win_by_being_first(self):
|
|
"""The bug this guards: scoring pairs instead of matches picked offset 0."""
|
|
gram = panel_memory()
|
|
pad = 0x0800
|
|
sram = bytes(pad) + gram[STATUS_BYTES:] + gram[:STATUS_BYTES] + bytes(0x40)
|
|
_, _, best, total = uvk5_buffers.locate(sram, gram)
|
|
self.assertGreater(best, total * 0.9)
|
|
self.assertNotEqual(uvk5_buffers.score(sram, 0, gram), total,
|
|
"offset 0 is blank here and must not score full marks")
|
|
|
|
def test_a_partly_stale_buffer_still_wins(self):
|
|
"""The panel can be a frame ahead of the buffer it was copied from."""
|
|
gram = panel_memory()
|
|
pad = 0x0400
|
|
frame = bytearray(gram[STATUS_BYTES:])
|
|
for i in range(0, 60):
|
|
frame[i] ^= 0x5A
|
|
sram = bytes(pad) + bytes(frame) + gram[:STATUS_BYTES] + bytes(0x80)
|
|
found, _, best, total = uvk5_buffers.locate(sram, gram)
|
|
self.assertEqual(found, uvk5_buffers.SRAM_BASE + pad)
|
|
# What matters is that the right offset wins, not that it is perfect: the
|
|
# panel can be a frame ahead of the buffer it was copied from.
|
|
runner_up = max(uvk5_buffers.score(sram, off, gram)
|
|
for off in range(0, len(sram) - total + 1)
|
|
if off != pad)
|
|
self.assertGreater(best, runner_up)
|
|
|
|
|
|
class TestSymbols(unittest.TestCase):
|
|
def test_a_minimal_elf_has_no_symbols_to_offer(self):
|
|
"""tools/bin2elf.py writes program headers only, which is the usual case."""
|
|
elf = bytearray(0x34 + 32 + 0x40)
|
|
elf[0:4] = b"\x7fELF"
|
|
elf[4] = 1 # 32-bit
|
|
elf[5] = 1 # little endian
|
|
struct.pack_into("<I", elf, 0x1C, 0x34) # one program header
|
|
struct.pack_into("<H", elf, 0x2A, 32)
|
|
struct.pack_into("<H", elf, 0x2C, 1)
|
|
struct.pack_into("<I", elf, 0x20, 0) # no section headers
|
|
struct.pack_into("<H", elf, 0x30, 0)
|
|
import os
|
|
import tempfile
|
|
path = os.path.join(tempfile.mkdtemp(), "minimal.elf")
|
|
with open(path, "wb") as fh:
|
|
fh.write(bytes(elf))
|
|
self.assertEqual(uvk5_buffers.from_symbols(path), (None, None))
|
|
|
|
|
|
if __name__ == "__main__":
|
|
unittest.main()
|