src/linux/ptrace.c

   1 #include <sys/ptrace.h>
   2 #include <stdarg.h>
   3 #include <unistd.h>
   4 #include "syscall.h"
   5
   6 long ptrace(int req, ...)
   7 {
   8         va_list ap;
   9         pid_t pid;
  10         void *addr, *data, *addr2;
  11         long ret, result;
  12
  13         va_start(ap, req);
  14         pid = va_arg(ap, pid_t);
  15         addr = va_arg(ap, void *);
  16         data = va_arg(ap, void *);
  17         addr2 = va_arg(ap, void *);
  18         va_end(ap);
  19
  20         if (req-1U < 3) data = &result;
  21         ret = syscall(SYS_ptrace, req, pid, addr, data, addr2);
  22
  23         if (ret < 0 || req-1U >= 3) return ret;
  24         return result;
  25 }