Changeset e8039a86 in mainline for kernel/generic/src/ipc/ops/shareout.c

Timestamp:

2012-08-20T23:21:41Z (13 years ago)

Author:

Jakub Jermar <jakub@…>

Branches:

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

Children:

0343a1b

Parents:

642dc72

Message:

Separate system IPC logic into dedicated ops structure hooks.

File:

• kernel/generic/src/ipc/ops/shareout.c (modified) (1 diff)

kernel/generic/src/ipc/ops/shareout.c

@@ -34 +34 @@
 
 #include <ipc/sysipc_ops.h>
+#include <ipc/ipc.h>
+#include <mm/as.h>
+#include <synch/spinlock.h>
+#include <proc/task.h>
+#include <syscall/copy.h>
+#include <abi/errno.h>
+#include <arch.h>
+
+static int request_preprocess(call_t *call, phone_t *phone)
+{
+        size_t size = as_area_get_size(IPC_GET_ARG1(call->data));
+
+        if (!size)
+                return EPERM;
+        IPC_SET_ARG2(call->data, size);
+
+        return EOK;
+}
+
+static int answer_preprocess(call_t *answer, ipc_data_t *olddata)
+{
+        int rc = EOK;
+
+        if (!IPC_GET_RETVAL(answer->data)) {
+                /* Accepted, handle as_area receipt */
+
+                irq_spinlock_lock(&answer->sender->lock, true);
+                as_t *as = answer->sender->as;
+                irq_spinlock_unlock(&answer->sender->lock, true);
+
+                uintptr_t dst_base = (uintptr_t) -1;
+                rc = as_area_share(as, IPC_GET_ARG1(*olddata),
+                    IPC_GET_ARG2(*olddata), AS, IPC_GET_ARG3(*olddata),
+                    &dst_base, IPC_GET_ARG1(answer->data));
+                        
+                if (rc == EOK) {
+                        rc = copy_to_uspace((void *) IPC_GET_ARG2(answer->data),
+                            &dst_base, sizeof(dst_base));
+                }
+                        
+                IPC_SET_RETVAL(answer->data, rc);
+        }
+
+        return rc;
+}
 
 sysipc_ops_t ipc_m_share_out_ops = {
-        .request_preprocess = null_request_preprocess,
+        .request_preprocess = request_preprocess,
         .request_process = null_request_process,
-        .answer_preprocess = null_answer_preprocess,
+        .answer_preprocess = answer_preprocess,
         .answer_process = null_answer_process,
 };