DWARF_MINIMAL_REGS   32 tools/perf/util/perf_regs.h #define DWARF_MINIMAL_REGS ((1ULL << PERF_REG_IP) | (1ULL << PERF_REG_SP))
DWARF_MINIMAL_REGS   40 tools/perf/util/perf_regs.h #define DWARF_MINIMAL_REGS PERF_REGS_MASK