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#!/usr/bin/env python3
import subprocess
import bisect
import sys
import dataclasses
@dataclasses.dataclass
class Symbol:
addr: int
size: int
ty: str
scope: str
name: str
readelf = subprocess.run(
["readelf", "-s", "build/kernel.bin"],
capture_output=True,
encoding="UTF-8"
)
symbols = []
text_start = None
text_end = None
for line in readelf.stdout.split("\n")[3:-1]:
parts = list(line.split());
sym = Symbol(
addr=int(parts[1], 16),
size=int(parts[2]),
ty=parts[3],
scope=parts[4],
name=parts[7] if len(parts) >= 8 else "",
)
symbols.append(sym)
if sym.name == "text_start":
text_start = sym.addr
if sym.name == "text_end":
text_end = sym.addr
symbols.sort(key=lambda s: s.addr)
def find_sym(addr):
try:
if addr.startswith("0x") or addr.startswith("0X"):
addr = int(arg[2:], 16)
else:
addr = int(arg, 10)
except:
print(f"Invalid address: {addr}")
return
print(f"Address 0x{addr:016X}:")
idx = bisect.bisect_right(symbols, addr, key=lambda s: s.addr)
for i in range(idx-1, 0, -1):
sym = symbols[i]
if sym.addr < text_start:
break
if sym.addr > text_end:
break
print(f"\t{sym.name:<20} [0x{sym.addr:016X} : 0x{sym.size:04X}] {sym.ty:<7} {sym.scope:<7}")
if sym.ty == "FUNC":
return
print("\t<end of text>")
for arg in sys.argv[1:]:
find_sym(arg.strip())
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