Changeset fd4d8c0 in mainline for generic/src/ipc/sysipc.c

Timestamp:

2006-05-25T21:21:58Z (19 years ago)

Author:

Jakub Jermar <jakub@…>

Branches:

lfn, master, serial, ticket/834-toolchain-update, topic/msim-upgrade, topic/simplify-dev-export

Children:

b31d188

Parents:

baafe71

Message:

Modify as_area_share() to accept destination area flags bitmask from the sender
(i.e. the sender can limit access mode to the shared area for the recipient).
Modify IPC_M_AS_AREA_SEND code to support this. Arguments for sender: arg1=as_area,
arg2=size, arg3=flags_mask.

The mechanism seems to work, but the page fault handlers need to be altered to
distinguish between faults under different access modes.

File:

• generic/src/ipc/sysipc.c (modified) (2 diffs)

generic/src/ipc/sysipc.c

@@ -139 +139 @@
                         interrupts_restore(ipl);
                         
-                        return as_area_share(as, IPC_GET_ARG2(*olddata),IPC_GET_ARG3(*olddata),
-                                IPC_GET_ARG1(answer->data));
+                        return as_area_share(as, IPC_GET_ARG1(*olddata), IPC_GET_ARG2(*olddata),
+                                IPC_GET_ARG1(answer->data), IPC_GET_ARG3(*olddata));
                 }
         }
@@ -166 +166 @@
                 break;
         case IPC_M_AS_AREA_SEND:
-                size = as_get_size(IPC_GET_ARG2(call->data));
+                size = as_get_size(IPC_GET_ARG1(call->data));
                 if (!size) {
                         return EPERM;
                 }
-                IPC_SET_ARG3(call->data, size);
+                IPC_SET_ARG2(call->data, size);
                 break;
         default: