CX 180 arch/x86/um/signal.c GETREG(CX, cx); CX 259 arch/x86/um/signal.c PUTREG(CX, cx); CX 16 tools/perf/arch/x86/util/perf_regs.c SMPL_REG(CX, PERF_REG_X86_CX), CX 22 tools/perf/arch/x86/util/unwind-libdw.c dwarf_regs[1] = REG(CX); CX 34 tools/perf/arch/x86/util/unwind-libdw.c dwarf_regs[2] = REG(CX);