84 lines
2.0 KiB
Python
84 lines
2.0 KiB
Python
# genLinkerScript.py
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# Generates a linker script based on a given symbol map and base address offset
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import sys
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symbolExceptions = [ "_init",
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"_fini",
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"__nnDetailNintendoSdkRuntimeObjectFileRefer",
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"__nnDetailNintendoSdkRuntimeObjectFile",
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"__nnDetailNintendoSdkNsoFileRefer"
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]
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symbolPrefixes = [
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"Curl", # some curl stuff
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"curl", # moar curl
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# "_ZG", # guards
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# "_ZN", # regular variables
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# "_ZT", # typeinfo / vtables
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# "_ZZ",
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"_Z", # literally everything
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"pfnc_",
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"mem",
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"str"
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"alloc",
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"malloc",
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"free",
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"calloc",
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"realloc",
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"aligned_alloc",
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"malloc_usable_size"
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]
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if len(sys.argv) < 3:
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print("Syntax: genLinkerScript.py <map> <sizeFromMain>\n")
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sys.exit()
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# open our map file
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with open(sys.argv[1], "r") as f:
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lines = f.readlines()
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# open our new generated linker
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with open("syms.ld", "w") as linker:
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# we need to skip a few lines first
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curLine = 0
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for line in lines:
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# each line is structured as such:
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# 00000000:0000007100000160 _fini
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firstSplit = line.split(" ")
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if len(firstSplit) <= 1:
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continue
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addressSplit = firstSplit[1].split(":")
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if len(addressSplit) <= 1:
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continue
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address = addressSplit[1]
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symbolName = firstSplit[8]
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symbolName = symbolName.strip("\n\r")
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# the last few numbers are important, the higher ones are not
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address = address[9:]
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address = "0x" + address
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# we check to see if this symbol has a prefix that we need to keep
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if (any([symbolName.startswith(symbolPrefix)
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for symbolPrefix in symbolPrefixes])
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or symbolName in symbolExceptions):
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# skip the first 5 useless lines
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if curLine < 5:
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curLine += 1
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continue
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# sdk functions have a _0 at the end because they are duplicated
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# due to the originals being imported, so IDA adds a _0 at the
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# end... we need to strip this
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if symbolName.endswith("_0"):
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symbolName = symbolName[:-2]
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linker.write(
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"{} = {} - {};\n".format(symbolName, address, sys.argv[2]))
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print("Linker script generated.")
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