37   // Returns address of n-th instruction preceding addr,

    38   // NULL if no preceding instruction can be found.

    39   // On ZERO, we assume a constant instruction length of 1 byte.

    40   // It might be beneficial to check "is_readable" as we do on ppc and s390.

    41   static address find_prev_instr(address addr, int n_instr) {

    42     return addr - 1*n_instr;

    43   }

    44 

    45   // special-case instruction decoding.

    46   // There may be cases where the binutils disassembler doesn't do

    47   // the perfect job. In those cases, decode_instruction0 may kick in

    48   // and do it right.

    49   // If nothing had to be done, just return "here", otherwise return "here + instr_len(here)"

    50   static address decode_instruction0(address here, outputStream* st, address virtual_begin = NULL) {

    51     return here;

    52   }

    53 

    54   // platform-specific instruction annotations (like value of loaded constants)

    55   static void annotate(address pc, outputStream* st) { };

    56