REG_RBX             8 src/pkg/runtime/signal_netbsd_amd64.h #define SIG_RBX(info, ctxt) (SIG_REGS(ctxt).__gregs[REG_RBX])
REG_RBX             8 src/pkg/runtime/signal_solaris_amd64.h #define SIG_RBX(info, ctxt) (SIG_REGS(ctxt).gregs[REG_RBX])