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Fix sym_info.py and first_diff.py scripts to properly handle .bss (#205)

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Roman971 2020-06-13 03:56:17 +02:00 committed by GitHub
parent 4e70a24274
commit df3bfbc168
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GPG Key ID: 4AEE18F83AFDEB23
2 changed files with 15 additions and 16 deletions
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23
first_diff.py
View File

@ -53,8 +53,7 @@ if mybin == basebin:
exit(0)
def search_address(target_addr):
is_ram = target_addr & 0x80000000
def search_rom_address(target_addr):
ram_offset = None
prev_ram = 0
prev_rom = 0
@ -65,13 +64,15 @@ def search_address(target_addr):
with open(mymap) as f:
for line in f:
if "load address" in line:
if "noload" in line or "noload" in prev_line:
# Ignore .bss sections since we're looking for a ROM address
if ".bss" in line or ".bss" in prev_line:
ram_offset = None
continue
ram = int(line[16 : 16 + 18], 0)
rom = int(line[59 : 59 + 18], 0)
ram_offset = ram - rom
continue
prev_line = line
if (
@ -93,7 +94,7 @@ def search_address(target_addr):
cur_file = sym
continue
if rom > target_addr or (is_ram and ram > target_addr):
if rom > target_addr:
return f"{prev_sym} (RAM 0x{prev_ram:X}, ROM 0x{prev_rom:X}, {prev_file})"
prev_ram = ram
@ -113,13 +114,11 @@ def parse_map(map_fname):
with open(map_fname) as f:
for line in f:
if "load address" in line:
if "noload" in line or "noload" in prev_line:
ram_offset = None
continue
ram = int(line[16 : 16 + 18], 0)
rom = int(line[59 : 59 + 18], 0)
ram_offset = ram - rom
continue
prev_line = line
if (
@ -189,7 +188,7 @@ for i in range(24, len(mybin), 4):
or mybin[i + 3] != basebin[i + 3]
):
if diffs == 0:
print(f"First difference at ROM addr 0x{i:X}, {search_address(i)}")
print(f"First difference at ROM addr 0x{i:X}, {search_rom_address(i)}")
print(
f"Bytes: {hexbytes(mybin[i : i + 4])} vs {hexbytes(basebin[i : i + 4])}"
)
@ -197,10 +196,10 @@ for i in range(24, len(mybin), 4):
if (
len(found_instr_diff) < diff_count
and mybin[i] >> 2 != basebin[i] >> 2
and not search_address(i) in map_search_diff
and not search_rom_address(i) in map_search_diff
):
found_instr_diff.append(i)
map_search_diff.append(search_address(i))
map_search_diff.append(search_rom_address(i))
if diffs == 0:
print("No differences but ROMs differ?")
@ -208,7 +207,7 @@ if diffs == 0:
if len(found_instr_diff) > 0:
for i in found_instr_diff:
print(f"Instruction difference at ROM addr 0x{i:X}, {search_address(i)}")
print(f"Instruction difference at ROM addr 0x{i:X}, {search_rom_address(i)}")
print(
f"Bytes: {hexbytes(mybin[i : i + 4])} vs {hexbytes(basebin[i : i + 4])}"
)
@ -229,7 +228,7 @@ if diffs > 100:
print(f"No ROM shift{' (!?)' if definite_shift else ''}")
if args.diff_args:
diff_sym = search_address(found_instr_diff[0]).split()[0]
diff_sym = search_rom_address(found_instr_diff[0]).split()[0]
if args.diff_args == "prompt":
diff_args = input("Call diff.py with which arguments? ") or "--"
else:

8
sym_info.py
View File

@ -42,13 +42,15 @@ def search_address(target_addr):
with open(mymap) as f:
for line in f:
if "load address" in line:
if "noload" in line or "noload" in prev_line:
# Ignore .bss sections if we're looking for a ROM address
if not is_ram and (".bss" in line or ".bss" in prev_line):
ram_offset = None
continue
ram = int(line[16 : 16 + 18], 0)
rom = int(line[59 : 59 + 18], 0)
ram_offset = ram - rom
continue
prev_line = line
if (
@ -91,13 +93,11 @@ def search_symbol(target_sym):
with open(mymap) as f:
for line in f:
if "load address" in line:
if "noload" in line or "noload" in prev_line:
ram_offset = None
continue
ram = int(line[16 : 16 + 18], 0)
rom = int(line[59 : 59 + 18], 0)
ram_offset = ram - rom
continue
prev_line = line
if (