minix/lib/libsys/sys_vircopy.c

   1 #include "syslib.h"
   2 #include <string.h>
   3
   4 int sys_vircopy(src_proc, src_vir,
   5         dst_proc, dst_vir, bytes, flags)
   6 endpoint_t src_proc;            /* source process */
   7 vir_bytes src_vir;              /* source virtual address */
   8 endpoint_t dst_proc;            /* destination process */
   9 vir_bytes dst_vir;              /* destination virtual address */
  10 phys_bytes bytes;               /* how many bytes */
  11 int flags;                      /* copy flags */
  12 {
  13 /* Transfer a block of data.  The source and destination can each either be a
  14  * process number or SELF (to indicate own process number).
  15  */
  16
  17   message copy_mess;
  18
  19   if (bytes == 0L) return(OK);
  20   memset(&copy_mess, 0, sizeof(copy_mess));
  21   copy_mess.m_lsys_krn_sys_copy.src_endpt = src_proc;
  22   copy_mess.m_lsys_krn_sys_copy.src_addr = src_vir;
  23   copy_mess.m_lsys_krn_sys_copy.dst_endpt = dst_proc;
  24   copy_mess.m_lsys_krn_sys_copy.dst_addr = dst_vir;
  25   copy_mess.m_lsys_krn_sys_copy.nr_bytes = bytes;
  26   copy_mess.m_lsys_krn_sys_copy.flags = flags;
  27
  28   return(_kernel_call(SYS_VIRCOPY, &copy_mess));
  29 }