29 lines
741 B
Python
29 lines
741 B
Python
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"""Prints the pcs that access each stack location in a function. Useful for finding
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infrequently used stack space.
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Pipe in disassembly like so:
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arm-none-eabi-objdump --disassemble=mp_execute_bytecode build-metro_m0_express/firmware.elf | python ../../tools/stack-loc-to-pc.py
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"""
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import sys
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import re
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offset = re.compile(r"sp, #(\d+)")
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offsets = {}
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for line in sys.stdin:
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if "sp" in line:
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m = offset.search(line)
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o = int(m.groups()[0])
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pc = line.split(":")[0]
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if o not in offsets:
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offsets[o] = []
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offsets[o].append(pc.strip())
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print("Offset", "Size", "PCs", sep="\t")
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last_o = 0
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for o in sorted(offsets):
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print(o, o - last_o, offsets[o], sep="\t")
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last_o = o
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