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#include <sys/ptrace.h>
#include <stdarg.h>
#include <unistd.h>
#include "syscall.h"
long ptrace(int req, ...)
{
va_list ap;
pid_t pid;
void *addr, *data, *addr2;
long ret, result;
va_start(ap, req);
pid = va_arg(ap, pid_t);
addr = va_arg(ap, void *);
data = va_arg(ap, void *);
addr2 = va_arg(ap, void *);
va_end(ap);
if (req<4U) data = &result;
ret = syscall(SYS_ptrace, req, pid, addr, data, addr2);
if (ret<0 || req>=4U) return ret;
return result;
}
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