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53 lines
2.2 KiB
Python
53 lines
2.2 KiB
Python
from typing import List
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ARM_FUNC_START = '\tarm_func_start '
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BRANCH_LINK_INSTRUCTION = '\tbl '
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BRANCH_LINK_EXCHANGE_INSTRUCTION = '\tblx '
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BRANCH_INSTRUCTION = '\tb '
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WORD_KEY = '.word '
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WORD_PLUS_OFFSET = ' + 0x'
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"""
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Searches through an ASM file's contents for all external symbols, then populates a .inc file with all the necessary .public definitions.
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"""
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def write_inc_file(lines: List[str], file_path: str):
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defined_functions = set()
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used_functions = set()
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for line in lines:
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if line.startswith(ARM_FUNC_START):
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defined_functions.add(line[len(ARM_FUNC_START) : -1])
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elif line.startswith(BRANCH_LINK_INSTRUCTION):
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used_functions.add(line[len(BRANCH_LINK_INSTRUCTION) : -1])
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elif line.startswith(BRANCH_INSTRUCTION):
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function = line[len(BRANCH_INSTRUCTION) : -1]
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if function[0] != '_':
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semicolon_index = function.index(' ; ')
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used_functions.add(function[:semicolon_index])
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elif line.startswith(BRANCH_LINK_EXCHANGE_INSTRUCTION):
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function = line[len(BRANCH_LINK_EXCHANGE_INSTRUCTION) : -1]
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if function not in {'fp', 'ip', 'lr', 'sb', 'sl'} and not (
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function.startswith('r') and function[1:].isdigit() # rN
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):
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used_functions.add(function)
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else:
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word_index = line.find(WORD_KEY)
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if word_index >= 0 and f'{WORD_KEY}0x' not in line:
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word_plus_offset_index = line.find(WORD_PLUS_OFFSET)
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if word_plus_offset_index >= 0:
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new_word = line[word_index + len(WORD_KEY) : word_plus_offset_index]
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else:
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new_word = line[word_index + len(WORD_KEY) : -1]
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if new_word[0] < '0' or new_word > '9':
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used_functions.add(new_word)
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for function in defined_functions:
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if function in used_functions:
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used_functions.remove(function)
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write_lines = ['#pragma once\n']
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for function in sorted(used_functions):
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write_lines.append(f'.public {function}\n')
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with open(file_path, 'w') as inc_file:
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inc_file.writelines(write_lines)
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