minix/lib/libsys/sys_safecopy.c

   1
   2 #include "syslib.h"
   3
   4 #include <minix/safecopies.h>
   5
   6 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 {
  10 /* Transfer a block of data for which the other process has previously
  11  * given permission.
  12  */
  13
  14   message copy_mess;
  15
  16   copy_mess.m_lsys_kern_safecopy.from_to = src_e;
  17   copy_mess.m_lsys_kern_safecopy.gid = gr_id;
  18   copy_mess.m_lsys_kern_safecopy.offset = offset;
  19   copy_mess.m_lsys_kern_safecopy.address = (void *)address;
  20   copy_mess.m_lsys_kern_safecopy.bytes = bytes;
  21
  22   return(_kernel_call(SYS_SAFECOPYFROM, &copy_mess));
  23
  24 }
  25
  26 int sys_safecopyto(endpoint_t dst_e,
  27         cp_grant_id_t gr_id, vir_bytes offset,
  28         vir_bytes address, size_t bytes)
  29 {
  30 /* Transfer a block of data for which the other process has previously
  31  * given permission.
  32  */
  33
  34   message copy_mess;
  35
  36   copy_mess.m_lsys_kern_safecopy.from_to = dst_e;
  37   copy_mess.m_lsys_kern_safecopy.gid = gr_id;
  38   copy_mess.m_lsys_kern_safecopy.offset = offset;
  39   copy_mess.m_lsys_kern_safecopy.address = (void *)address;
  40   copy_mess.m_lsys_kern_safecopy.bytes = bytes;
  41
  42   return(_kernel_call(SYS_SAFECOPYTO, &copy_mess));
  43
  44 }