mirror of
https://github.com/zeldaret/mm.git
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140 lines
3.8 KiB
Python
Executable File
140 lines
3.8 KiB
Python
Executable File
#!/usr/bin/env python3
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import os.path
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import argparse
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parser = argparse.ArgumentParser(
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description="Display various information about a symbol or address."
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)
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parser.add_argument(
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"name",
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type=str,
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default="",
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help="symbol name or ROM/RAM address to lookup"
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)
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parser.add_argument(
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"-e",
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"--expected",
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dest="use_expected",
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action="store_true",
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help="use the map file in expected/build/ instead of build/"
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)
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args = parser.parse_args()
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mymap = "build/mm.map"
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if args.use_expected:
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mymap = f"expected/{mymap}"
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if not os.path.isfile(mymap):
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print(f"{mymap} must exist.")
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exit(1)
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def search_address(target_addr):
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is_ram = target_addr & 0x80000000
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ram_offset = None
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prev_ram = 0
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prev_rom = 0
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prev_sym = "<start of rom>"
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cur_file = "<no file>"
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prev_file = cur_file
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prev_line = ""
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with open(mymap) as f:
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for line in f:
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if "load address" in line:
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# Ignore .bss sections if we're looking for a ROM address
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if not is_ram and (".bss" in line or ".bss" in prev_line):
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ram_offset = None
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continue
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ram = int(line[16 : 16 + 18], 0)
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rom = int(line[59 : 59 + 18], 0)
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ram_offset = ram - rom
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continue
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prev_line = line
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if (
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ram_offset is None
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or "=" in line
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or "*fill*" in line
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or " 0x" not in line
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):
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continue
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ram = int(line[16 : 16 + 18], 0)
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rom = ram - ram_offset
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sym = line.split()[-1]
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if "0x" in sym and "/" not in sym:
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ram_offset = None
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continue
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if "/" in sym:
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cur_file = sym
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continue
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if rom == target_addr or (is_ram and ram == target_addr):
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return f"{sym} (RAM 0x{ram:X}, ROM 0x{rom:X}, {cur_file})"
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if rom > target_addr or (is_ram and ram > target_addr):
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offset = target_addr - prev_ram if is_ram else target_addr - prev_rom
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return f"at 0x{offset:X} bytes inside {prev_sym} (RAM 0x{prev_ram:X}, ROM 0x{prev_rom:X}, {prev_file})"
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prev_ram = ram
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prev_rom = rom
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prev_sym = sym
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prev_file = cur_file
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return "at end of rom?"
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def search_symbol(target_sym):
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ram_offset = None
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cur_file = "<no file>"
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prev_line = ""
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with open(mymap) as f:
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for line in f:
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if "load address" in line:
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ram = int(line[16 : 16 + 18], 0)
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rom = int(line[59 : 59 + 18], 0)
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ram_offset = ram - rom
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continue
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prev_line = line
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if (
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ram_offset is None
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or "=" in line
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or "*fill*" in line
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or " 0x" not in line
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):
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continue
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ram = int(line[16 : 16 + 18], 0)
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rom = ram - ram_offset
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sym = line.split()[-1]
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if "0x" in sym and "/" not in sym:
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ram_offset = None
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continue
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elif "/" in sym:
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cur_file = sym
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continue
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if sym == target_sym:
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return (rom, cur_file, ram)
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return None
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try:
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target_addr = int(args.name, 0)
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print(args.name, "is", search_address(target_addr))
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except ValueError:
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sym_info = search_symbol(args.name)
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if sym_info is not None:
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sym_rom = sym_info[0]
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sym_file = sym_info[1]
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sym_ram = sym_info[2]
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print(f"Symbol {args.name} (RAM: 0x{sym_ram:08X}, ROM: 0x{sym_rom:06X}, {sym_file})")
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else:
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print(f"Symbol {args.name} not found in map file {mymap}")
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