lib/libsys/sys_vircopy.c

   1 #include "syslib.h"
   2
   3 PUBLIC int sys_vircopy(src_proc, src_seg, src_vir,
   4         dst_proc, dst_seg, dst_vir, bytes)
   5 endpoint_t src_proc;            /* source process */
   6 int src_seg;                    /* source memory segment */
   7 vir_bytes src_vir;              /* source virtual address */
   8 endpoint_t dst_proc;            /* destination process */
   9 int dst_seg;                    /* destination memory segment */
  10 vir_bytes dst_vir;              /* destination virtual address */
  11 phys_bytes bytes;               /* how many bytes */
  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). Virtual addresses
  15  * are offsets within LOCAL_SEG (text, stack, data), REMOTE_SEG, or BIOS_SEG.
  16  */
  17
  18   message copy_mess;
  19
  20   if (bytes == 0L) return(OK);
  21   copy_mess.CP_SRC_ENDPT = src_proc;
  22   copy_mess.CP_SRC_SPACE = src_seg;
  23   copy_mess.CP_SRC_ADDR = (long) src_vir;
  24   copy_mess.CP_DST_ENDPT = dst_proc;
  25   copy_mess.CP_DST_SPACE = dst_seg;
  26   copy_mess.CP_DST_ADDR = (long) dst_vir;
  27   copy_mess.CP_NR_BYTES = (long) bytes;
  28   return(_kernel_call(SYS_VIRCOPY, &copy_mess));
  29 }