48 lines
2.2 KiB
Python
48 lines
2.2 KiB
Python
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"""Generated bytes below are TEST DOUBLES, never real compiler/APK evidence."""
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import struct
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def elf(cpu='aarch64',needed=(),textrel=False):
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cls=1 if cpu=='arm' else 2
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machine={'arm':40,'aarch64':183,'x86_64':62}[cpu]
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strings=b'\0';offsets=[]
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for name in needed:offsets.append(len(strings));strings+=name.encode()+b'\0'
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data=bytearray(1024);data[:7]=b'\x7fELF'+bytes([cls,1,1])
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struct.pack_into('<HHI',data,16,3,machine,1)
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if cls==2:
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struct.pack_into('<Q',data,32,64);struct.pack_into('<HHH',data,52,64,56,2)
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struct.pack_into('<IIQQQQQQ',data,64,1,5,0,0,0,1024,1024,16384)
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struct.pack_into('<IIQQQQQQ',data,120,2,6,256,256,256,192,192,8)
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fmt='<qQ';step=16
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else:
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struct.pack_into('<I',data,28,52);struct.pack_into('<HHH',data,40,52,32,2)
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struct.pack_into('<IIIIIIII',data,52,1,0,0,0,1024,1024,5,16384)
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struct.pack_into('<IIIIIIII',data,84,2,256,256,256,192,192,6,4)
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fmt='<iI';step=8
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tags=[(1,n) for n in offsets]+[(5,512),(10,len(strings))]
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if textrel:tags.append((22,0))
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tags.append((0,0))
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for i,pair in enumerate(tags):struct.pack_into(fmt,data,256+i*step,*pair)
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data[512:512+len(strings)]=strings
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return bytes(data)
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def section_elf(cpu='aarch64',debug=b'FIRST DEBUG DATA',code=b'CODE BYTES'):
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"""TEST DOUBLE with a section table, not an executable Android program."""
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data=bytearray(elf(cpu)); cls=1 if cpu=='arm' else 2
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names=b'\0.text\0.shstrtab\0.debug_info\0'
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data[640:640+len(code)]=code
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data.extend(names);nameoff=1024
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debugoff=len(data);data.extend(debug)
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while len(data)%8:data.append(0)
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table=len(data);fmt='<IIIIIIIIII' if cls==1 else '<IIQQQQIIQQ'
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size=struct.calcsize(fmt)
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sections=[(0,0,0,0,0,0,0,0,0,0),
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(1,1,6,640,640,len(code),0,0,4,0),
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(7,3,0,0,nameoff,len(names),0,0,1,0),
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(17,1,0,0,debugoff,len(debug),0,0,1,0)]
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for row in sections:data.extend(struct.pack(fmt,*row))
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if cls==1:
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struct.pack_into('<I',data,32,table);struct.pack_into('<HHH',data,46,size,4,2)
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else:
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struct.pack_into('<Q',data,40,table);struct.pack_into('<HHH',data,58,size,4,2)
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return bytes(data)
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