149 lines
4.6 KiB
Python
Executable File
149 lines
4.6 KiB
Python
Executable File
#!/usr/bin/env python3
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############################################################################
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# tools/mkallsyms.py
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#
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# Licensed to the Apache Software Foundation (ASF) under one or more
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# contributor license agreements. See the NOTICE file distributed with
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# this work for additional information regarding copyright ownership. The
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# ASF licenses this file to you under the Apache License, Version 2.0 (the
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# "License"); you may not use this file except in compliance with the
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# License. You may obtain a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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# License for the specific language governing permissions and limitations
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# under the License.
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#
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############################################################################
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import errno
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import os
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import re
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import sys
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try:
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import cxxfilt
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from elftools import __version__
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from elftools.elf.elffile import ELFFile
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from elftools.elf.sections import SymbolTableSection
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except ModuleNotFoundError:
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print("Please execute the following command to install dependencies:")
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print("pip install pyelftools cxxfilt")
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class SymbolTables(object):
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def __init__(self, elffile, output):
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try:
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file = open(elffile, "rb")
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self.elffile = ELFFile(file)
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except FileNotFoundError:
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self.elffile = None
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self.output = output
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self.symbol_list = []
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def symbol_filter(self, symbol):
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if symbol["st_info"]["type"] != "STT_FUNC":
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return None
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if symbol["st_info"]["bind"] == "STB_WEAK":
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return None
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if symbol["st_shndx"] == "SHN_UNDEF":
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return None
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return symbol
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def print_symbol_tables(self, isnoconst=False):
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noconst = "const"
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if not isnoconst:
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noconst = ""
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self.emitline("#include <nuttx/compiler.h>")
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self.emitline("#include <nuttx/symtab.h>\n")
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self.emitline("%s int g_nallsyms = %d + 2;" % (noconst, len(self.symbol_list)))
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self.emitline(
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"%s struct symtab_s g_allsyms[%d + 2] =\n{"
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% (noconst, len(self.symbol_list))
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)
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self.emitline(' { "Unknown", (FAR %s void *)0x00000000 },' % (noconst))
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for symbol in self.symbol_list:
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self.emitline(
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' { "%s", (FAR %s void *)%s },' % (symbol[1], noconst, hex(symbol[0]))
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)
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self.emitline(' { "Unknown", (FAR %s void *)0xffffffff }\n};' % (noconst))
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def get_symtable(self):
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symbol_tables = [
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(idx, s)
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for idx, s in enumerate(self.elffile.iter_sections())
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if isinstance(s, SymbolTableSection)
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]
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if not symbol_tables and self.elffile.num_sections() == 0:
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self.emitline("")
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return
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for section_index, section in symbol_tables:
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if not isinstance(section, SymbolTableSection):
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continue
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if section["sh_entsize"] == 0 or section.name != ".symtab":
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continue
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return section
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def parse_symbol(self):
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if self.elffile is None:
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return
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symtable = self.get_symtable()
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for nsym, symbol in enumerate(symtable.iter_symbols()):
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if self.symbol_filter(symbol) is not None:
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symbol_name = cxxfilt.demangle(symbol.name)
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func_name = re.sub(r"\(.*$", "", symbol_name)
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self.symbol_list.append((symbol["st_value"] & ~0x01, func_name))
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self.symbol_list = sorted(self.symbol_list, key=lambda item: item[0])
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def emitline(self, s=""):
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self.output.write(str(s) + "\n")
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def usage():
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print("Usage: mkallsyms.py [noconst] <ELFBIN> [output file]")
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os._exit(errno.ENOENT)
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def parse_args(argv):
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index = 1
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argc = len(argv)
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outfile = None
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elffile = None
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if argc > index and argv[index] == "--version":
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print("mkallsyms.py: based on pyelftools %s" % __version__)
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os.exit(0)
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if argc > index and argv[index] == "noconst":
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noconst = True
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index += 1
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else:
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noconst = False
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if argc > index:
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elffile = argv[index]
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index += 1
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if argc > index:
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outfile = open(argv[index], "w")
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else:
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outfile = sys.stdout
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return noconst, elffile, outfile
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if __name__ == "__main__":
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noconst, elffile, outfile = parse_args(sys.argv)
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readelf = SymbolTables(elffile, outfile)
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readelf.parse_symbol()
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readelf.print_symbol_tables(noconst)
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