lib/syslib/sys_safecopy.c

   1
   2 #include "syslib.h"
   3
   4 #include <minix/safecopies.h>
   5
   6 PUBLIC int sys_safecopyfrom(endpoint_t src_e,
   7         cp_grant_id_t gr_id, vir_bytes offset,
   8         vir_bytes address, size_t bytes,
   9         int my_seg)
  10 {
  11 /* Transfer a block of data for which the other process has previously
  12  * given permission.
  13  */
  14
  15   message copy_mess;
  16
  17   copy_mess.SCP_FROM_TO = src_e;
  18   copy_mess.SCP_INFO = SCP_MAKEINFO(my_seg);
  19   copy_mess.SCP_GID = gr_id;
  20   copy_mess.SCP_OFFSET = (long) offset;
  21   copy_mess.SCP_ADDRESS = (char *) address;
  22   copy_mess.SCP_BYTES = (long) bytes;
  23
  24   return(_taskcall(SYSTASK, SYS_SAFECOPYFROM, &copy_mess));
  25
  26 }
  27
  28 PUBLIC int sys_safecopyto(endpoint_t dst_e,
  29         cp_grant_id_t gr_id, vir_bytes offset,
  30         vir_bytes address, size_t bytes,
  31         int my_seg)
  32 {
  33 /* Transfer a block of data for which the other process has previously
  34  * given permission.
  35  */
  36
  37   message copy_mess;
  38
  39   copy_mess.SCP_FROM_TO = dst_e;
  40   copy_mess.SCP_INFO = SCP_MAKEINFO(my_seg);
  41   copy_mess.SCP_GID = gr_id;
  42   copy_mess.SCP_OFFSET = (long) offset;
  43   copy_mess.SCP_ADDRESS = (char *) address;
  44   copy_mess.SCP_BYTES = (long) bytes;
  45
  46   return(_taskcall(SYSTASK, SYS_SAFECOPYTO, &copy_mess));
  47
  48 }