bad_ra            916 src/mips/simulator-mips.cc   registers_[pc] = bad_ra;
bad_ra            917 src/mips/simulator-mips.cc   registers_[ra] = bad_ra;
bad_ra           1208 src/mips/simulator-mips.cc   return ((registers_[pc] == bad_ra) || (registers_[pc] == end_sim_pc));
bad_ra           2319 src/mips/simulator-mips.cc   int32_t next_pc = bad_ra;
bad_ra           2616 src/mips/simulator-mips.cc   if (next_pc != bad_ra) {