Changes in kernel/generic/src/mm/backend_elf.c [9d58539:59fb782] in mainline

File:

• kernel/generic/src/mm/backend_elf.c (modified) (7 diffs)

kernel/generic/src/mm/backend_elf.c

@@ -58 +58 @@
 static void elf_destroy(as_area_t *);
 
+static bool elf_is_resizable(as_area_t *);
+static bool elf_is_shareable(as_area_t *);
+
 static int elf_page_fault(as_area_t *, uintptr_t, pf_access_t);
 static void elf_frame_free(as_area_t *, uintptr_t, uintptr_t);
@@ -66 +69 @@
         .share = elf_share,
         .destroy = elf_destroy,
+
+        .is_resizable = elf_is_resizable,
+        .is_shareable = elf_is_shareable,
 
         .page_fault = elf_page_fault,
@@ -213 +219 @@
 }
 
+bool elf_is_resizable(as_area_t *area)
+{
+        return true;
+}
+
+bool elf_is_shareable(as_area_t *area)
+{
+        return true;
+}
+
+
 /** Service a page fault in the ELF backend address space area.
  *
@@ -218 +235 @@
  *
  * @param area          Pointer to the address space area.
- * @param addr          Faulting virtual address.
+ * @param upage         Faulting virtual page.
  * @param access        Access mode that caused the fault (i.e.
  *                      read/write/exec).
@@ -225 +242 @@
  *                      on success (i.e. serviced).
  */
-int elf_page_fault(as_area_t *area, uintptr_t addr, pf_access_t access)
+int elf_page_fault(as_area_t *area, uintptr_t upage, pf_access_t access)
 {
         elf_header_t *elf = area->backend_data.elf;
@@ -233 +250 @@
         uintptr_t frame;
         uintptr_t kpage;
-        uintptr_t upage;
         uintptr_t start_anon;
         size_t i;
@@ -240 +256 @@
         ASSERT(page_table_locked(AS));
         ASSERT(mutex_locked(&area->lock));
+        ASSERT(IS_ALIGNED(upage, PAGE_SIZE));
 
         if (!as_area_check_access(area, access))
                 return AS_PF_FAULT;
         
-        if (addr < ALIGN_DOWN(entry->p_vaddr, PAGE_SIZE))
+        if (upage < ALIGN_DOWN(entry->p_vaddr, PAGE_SIZE))
                 return AS_PF_FAULT;
         
-        if (addr >= entry->p_vaddr + entry->p_memsz)
+        if (upage >= entry->p_vaddr + entry->p_memsz)
                 return AS_PF_FAULT;
         
-        i = (addr - ALIGN_DOWN(entry->p_vaddr, PAGE_SIZE)) >> PAGE_WIDTH;
+        i = (upage - ALIGN_DOWN(entry->p_vaddr, PAGE_SIZE)) >> PAGE_WIDTH;
         base = (uintptr_t)
             (((void *) elf) + ALIGN_DOWN(entry->p_offset, PAGE_SIZE));
-
-        /* Virtual address of faulting page */
-        upage = ALIGN_DOWN(addr, PAGE_SIZE);
 
         /* Virtual address of the end of initialized part of segment */