minix/lib/libsys/sys_safecopy.c

#include "syslib.h"

#include <minix/safecopies.h>

int sys_safecopyfrom(endpoint_t src_e,
	cp_grant_id_t gr_id, vir_bytes offset,
	vir_bytes address, size_t bytes)
{
/* Transfer a block of data for which the other process has previously
 * given permission. 
 */

  message copy_mess;

  copy_mess.SCP_FROM_TO = src_e;
  copy_mess.SCP_GID = gr_id;
  copy_mess.SCP_OFFSET = (long) offset;
  copy_mess.SCP_ADDRESS = (char *) address;
  copy_mess.SCP_BYTES = (long) bytes;

  /* for older kernels that still need the 'seg' field
   * provide the right value.
   */
  copy_mess.SCP_SEG_OBSOLETE = D;

  return(_kernel_call(SYS_SAFECOPYFROM, &copy_mess));

}

int sys_safecopyto(endpoint_t dst_e,
	cp_grant_id_t gr_id, vir_bytes offset,
	vir_bytes address, size_t bytes)
{
/* Transfer a block of data for which the other process has previously
 * given permission. 
 */

  message copy_mess;

  copy_mess.SCP_FROM_TO = dst_e;
  copy_mess.SCP_GID = gr_id;
  copy_mess.SCP_OFFSET = (long) offset;
  copy_mess.SCP_ADDRESS = (char *) address;
  copy_mess.SCP_BYTES = (long) bytes;

  /* for older kernels that still need the 'seg' field
   * provide the right value.
   */
  copy_mess.SCP_SEG_OBSOLETE = D;

  return(_kernel_call(SYS_SAFECOPYTO, &copy_mess));

}