PTRACE_SYSEMU_SINGLESTEP
case PTRACE_SYSEMU_SINGLESTEP:
op = PTRACE_SYSEMU_SINGLESTEP;
if (ptrace(PTRACE_SYSEMU_SINGLESTEP, pid, 0, 0) < 0)
#ifndef PTRACE_SYSEMU_SINGLESTEP
case PTRACE_SYSEMU_SINGLESTEP:
#define is_sysemu_singlestep(request) ((request) == PTRACE_SYSEMU_SINGLESTEP)
if (request == PTRACE_SYSEMU || request == PTRACE_SYSEMU_SINGLESTEP)