mirror of https://github.com/Shizmob/smol
80 lines
2.9 KiB
Python
Executable File
80 lines
2.9 KiB
Python
Executable File
#!/usr/bin/env python3
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import argparse
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import glob
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import itertools
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import os.path
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import shutil
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import subprocess
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import sys
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from smolshared import *
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from smolparse import *
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from smolemit import *
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def main():
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parser = argparse.ArgumentParser()
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parser.add_argument('-m', '--target', default='', \
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help='architecture to generate asm code for (default: auto)')
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parser.add_argument('-l', '--library', metavar='LIB', action='append', \
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help='libraries to link against')
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parser.add_argument('-L', '--libdir', metavar='DIR', action='append', \
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help="directories to search libraries in")
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parser.add_argument('--nasm', default=shutil.which('nasm'), \
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help="which nasm binary to use")
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parser.add_argument('--cc', default=shutil.which('cc'), \
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help="which cc binary to use")
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parser.add_argument('--scanelf', default=shutil.which('scanelf'), \
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help="which scanelf binary to use")
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parser.add_argument('--readelf', default=shutil.which('readelf'), \
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help="which readelf binary to use")
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parser.add_argument('-s', '--hash16', default=False, action='store_true', \
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help="Use 16-bit (BSD) hashes instead of 32-bit djb2 hashes. "\
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+"Conflicts with -DUSE_DNLOAD_LOADER")
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# parser.add_argument('-d', '--dnload', default=False, action='store_true', \
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# help="Use dnload's mechanism of importing functions. Slightly larger, but usually better compressable.")
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# parser.add_argument('--libsep', default=False, action='store_true', \
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# help="Separete import symbols per library, instead of looking at every library when resolving a symbol.")
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parser.add_argument('-n', '--nx', default=False, action='store_true', \
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help="Use NX (i.e. don't use RWE pages). Costs the size of one phdr, "\
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+"plus some extra bytes on i386.")
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parser.add_argument('input', nargs='+', help="input object file")
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parser.add_argument('output', type=argparse.FileType('w'), \
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help="output nasm file", default=sys.stdout)
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args = parser.parse_args()
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if args.libdir is None: args.libdir = []
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arch = args.target.tolower() if len(args.target)!=0 \
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else decide_arch(args.input)
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if arch not in archmagic:
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eprintf("Unknown architecture '" + str(arch) + "'")
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sys.exit(1)
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syms = get_needed_syms(args.readelf, args.input)
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paths = get_cc_paths(args.cc)
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spaths = args.libdir + paths['libraries']
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libraries=paths['libraries']
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libnames = args.library
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libs = list(find_libs(spaths, libnames))
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symbols = {}
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for symbol, reloc in syms:
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library = find_symbol(args.scanelf, libs, libnames, symbol)
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if not library:
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eprintf("could not find symbol: {}".format(symbol))
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sys.exit(1)
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symbols.setdefault(library, [])
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symbols[library].append((symbol, reloc))
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output(arch, symbols, args.nx, args.hash16, args.output)
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if __name__ == '__main__':
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main()
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