minix/lib/syslib/sys_safecopy.c
Ben Gras 9df1183b94 . removed const from putenv() for g++
. added safecopies.c:
  these are library functions to maintain grant tables in own address space
. sys_safecopy.c:
  interfaces to kernel calls to perform safe copy functions in from or to
  foreign process
. changes in i/o fields (type merged with request) reflected in
  library functions (sys_out.c, sys_vinb.c, sys_vinl.c, sys_vinw.c,
  sys_voutb.c, sys_voutl.c, sys_voutw.c)
. type merged with request in sys_sdevio, also now accepts offset which
  is used when a grant is specified (the _DIO_SAFE subtype)
. system printf() function changed to send DIAGNOSTICS_S messages, which
  specify a grant id instead of a direct address for the buffer to be
  printed; tty and log can then safecopy the buffer
2006-06-20 08:45:04 +00:00

48 lines
1.1 KiB
C

#include "syslib.h"
#include <minix/safecopies.h>
PUBLIC int sys_safecopyfrom(endpoint_t src_e,
cp_grant_id_t gr_id, vir_bytes offset,
vir_bytes address, size_t bytes,
int my_seg)
{
/* 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_INFO = SCP_MAKEINFO(my_seg);
copy_mess.SCP_GID = gr_id;
copy_mess.SCP_OFFSET = (long) offset;
copy_mess.SCP_ADDRESS = (char *) address;
copy_mess.SCP_BYTES = (long) bytes;
return(_taskcall(SYSTASK, SYS_SAFECOPYFROM, &copy_mess));
}
PUBLIC int sys_safecopyto(endpoint_t dst_e,
cp_grant_id_t gr_id, vir_bytes offset,
vir_bytes address, size_t bytes,
int my_seg)
{
/* 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_INFO = SCP_MAKEINFO(my_seg);
copy_mess.SCP_GID = gr_id;
copy_mess.SCP_OFFSET = (long) offset;
copy_mess.SCP_ADDRESS = (char *) address;
copy_mess.SCP_BYTES = (long) bytes;
return(_taskcall(SYSTASK, SYS_SAFECOPYTO, &copy_mess));
}