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268 palkovsky 1
#!/usr/bin/env python
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import sys
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import struct
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import re
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MAXSTRING=63
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symtabfmt = "<Q%ds" % (MAXSTRING+1)
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funcline = re.compile(r'([0-9a-f]+)\s+[lg]\s+.\s+\.text\s+([0-9a-f]+)\s+(.*)$')
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bssline = re.compile(r'([0-9a-f]+)\s+[lg]\s+[a-zA-Z]\s+\.bss\s+([0-9a-f]+)\s+(.*)$')
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dataline = re.compile(r'([0-9a-f]+)\s+[lg]\s+[a-zA-Z]\s+\.data\s+([0-9a-f]+)\s+(.*)$')
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fileexp = re.compile(r'([^\s]+):\s+file format')
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def read_obdump(inp):
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    funcs = {}
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    data = {}
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    bss ={}
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    fname = ''
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    for line in inp:
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        line = line.strip()
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        res = funcline.match(line)
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        if res:
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            funcs.setdefault(fname,[]).append((int(res.group(1),16),
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                                               res.group(3)))
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            continue
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        res = bssline.match(line)
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        if res:
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            start = int(res.group(1),16)
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            end = int(res.group(2),16)
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            if end:
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                bss.setdefault(fname,[]).append((start,res.group(3)))
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        res = dataline.match(line)
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        if res:
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            start = int(res.group(1),16)
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            end = int(res.group(2),16)
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            if end:
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                data.setdefault(fname,[]).append((start,res.group(3)))
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        res = fileexp.match(line)
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        if res:
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            fname = res.group(1)
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            continue
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    return {
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        'text' : funcs,
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        'bss' : bss,
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        'data' : data
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        }
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startfile = re.compile(r'\.(text|bss|data)\s+(0x[0-9a-f]+)\s+0x[0-9a-f]+\s+(.*)$')
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def generate(kmapf, obmapf, out):
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    obdump = read_obdump(obmapf)    
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    def sorter(x,y):
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        return cmp(x[0],y[0])
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    for line in kmapf:
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        line = line.strip()
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        res = startfile.match(line)
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        if res and obdump[res.group(1)].has_key(res.group(3)):
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            offset = int(res.group(2),16)
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            fname = res.group(3)
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            symbols = obdump[res.group(1)][fname]
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            symbols.sort(sorter)
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            for addr,symbol in symbols:                
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                value = fname + ':' + symbol
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                data = struct.pack(symtabfmt,addr+offset,value[:MAXSTRING])
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                out.write(data)
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    out.write(struct.pack(symtabfmt,0,''))
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def main():
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    if len(sys.argv) != 4:
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        print "Usage: %s <kernel.map> <nm dump> <output.bin>" % sys.argv[0]
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        sys.exit(1)
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    kmapf = open(sys.argv[1],'r')
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    obmapf = open(sys.argv[2],'r')
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    out = open(sys.argv[3],'w')
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    generate(kmapf,obmapf,out)
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    kmapf.close()
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    obmapf.close()
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    out.close()
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if __name__ == '__main__':
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    main()