Changeset 75b139f in mainline

Timestamp:

2016-08-28T13:42:19Z (8 years ago)

Author:

Jakub Jermar <jakub@…>

Branches:

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

Children:

519a97d

Parents:

f2c3fed

Message:

Add skeleton of the user backend

Location:

kernel

Files:

• Makefile (modified) (1 diff)
• generic/include/mm/as.h (modified) (3 diffs)
• generic/src/mm/as.c (modified) (1 diff)
• generic/src/mm/backend_user.c (added)

kernel/Makefile

@@ -237 +237 @@
         generic/src/mm/backend_elf.c \
         generic/src/mm/backend_phys.c \
+        generic/src/mm/backend_user.c \
         generic/src/mm/slab.c \
         generic/src/lib/func.c \

kernel/generic/include/mm/as.h

@@ -169 +169 @@
 /** Backend data stored in address space area. */
 typedef union mem_backend_data {
+        /* anon_backend members */
+        struct {
+        };
+
         /** elf_backend members */
         struct {
@@ -181 +185 @@
                 bool anonymous;
         };
+
+        /** user_backend members */
+        struct {
+                int pager;      /**< Phone to the pager. */
+        };
+
 } mem_backend_data_t;
 
@@ -296 +306 @@
 extern mem_backend_t elf_backend;
 extern mem_backend_t phys_backend;
+extern mem_backend_t user_backend;
 
 /* Address space area related syscalls. */

kernel/generic/src/mm/as.c

@@ -2186 +2186 @@
 {
         uintptr_t virt = base;
+        mem_backend_t *backend;
+        mem_backend_data_t backend_data;
+
+        if (pager == AS_AREA_UNPAGED)
+                backend = &anon_backend;
+        else {
+                backend = &user_backend;
+                backend_data.pager = pager;
+        }
         as_area_t *area = as_area_create(AS, flags, size,
-            AS_AREA_ATTR_NONE, &anon_backend, NULL, &virt, bound);
+            AS_AREA_ATTR_NONE, backend, &backend_data, &virt, bound);
         if (area == NULL)
                 return (sysarg_t) AS_MAP_FAILED;