Initial Spring 2016 commit.

2015-12-23 00:50:04 +00:00
commit cafa9f5690
732 changed files with 92195 additions and 0 deletions
--- a/kern/include/addrspace.h
+++ b/kern/include/addrspace.h
@@ -0,0 +1,132 @@
+/*
+ * Copyright (c) 2000, 2001, 2002, 2003, 2004, 2005, 2008, 2009
+ *	The President and Fellows of Harvard College.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. Neither the name of the University nor the names of its contributors
+ *    may be used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE UNIVERSITY AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE UNIVERSITY OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+#ifndef _ADDRSPACE_H_
+#define _ADDRSPACE_H_
+
+/*
+ * Address space structure and operations.
+ */
+
+
+#include <vm.h>
+#include "opt-dumbvm.h"
+
+struct vnode;
+
+
+/*
+ * Address space - data structure associated with the virtual memory
+ * space of a process.
+ *
+ * You write this.
+ */
+
+struct addrspace {
+#if OPT_DUMBVM
+        vaddr_t as_vbase1;
+        paddr_t as_pbase1;
+        size_t as_npages1;
+        vaddr_t as_vbase2;
+        paddr_t as_pbase2;
+        size_t as_npages2;
+        paddr_t as_stackpbase;
+#else
+        /* Put stuff here for your VM system */
+#endif
+};
+
+/*
+ * Functions in addrspace.c:
+ *
+ *    as_create - create a new empty address space. You need to make
+ *                sure this gets called in all the right places. You
+ *                may find you want to change the argument list. May
+ *                return NULL on out-of-memory error.
+ *
+ *    as_copy   - create a new address space that is an exact copy of
+ *                an old one. Probably calls as_create to get a new
+ *                empty address space and fill it in, but that's up to
+ *                you.
+ *
+ *    as_activate - make curproc's address space the one currently
+ *                "seen" by the processor.
+ *
+ *    as_deactivate - unload curproc's address space so it isn't
+ *                currently "seen" by the processor. This is used to
+ *                avoid potentially "seeing" it while it's being
+ *                destroyed.
+ *
+ *    as_destroy - dispose of an address space. You may need to change
+ *                the way this works if implementing user-level threads.
+ *
+ *    as_define_region - set up a region of memory within the address
+ *                space.
+ *
+ *    as_prepare_load - this is called before actually loading from an
+ *                executable into the address space.
+ *
+ *    as_complete_load - this is called when loading from an executable
+ *                is complete.
+ *
+ *    as_define_stack - set up the stack region in the address space.
+ *                (Normally called *after* as_complete_load().) Hands
+ *                back the initial stack pointer for the new process.
+ *
+ * Note that when using dumbvm, addrspace.c is not used and these
+ * functions are found in dumbvm.c.
+ */
+
+struct addrspace *as_create(void);
+int               as_copy(struct addrspace *src, struct addrspace **ret);
+void              as_activate(void);
+void              as_deactivate(void);
+void              as_destroy(struct addrspace *);
+
+int               as_define_region(struct addrspace *as,
+                                   vaddr_t vaddr, size_t sz,
+                                   int readable,
+                                   int writeable,
+                                   int executable);
+int               as_prepare_load(struct addrspace *as);
+int               as_complete_load(struct addrspace *as);
+int               as_define_stack(struct addrspace *as, vaddr_t *initstackptr);
+
+
+/*
+ * Functions in loadelf.c
+ *    load_elf - load an ELF user program executable into the current
+ *               address space. Returns the entry point (initial PC)
+ *               in the space pointed to by ENTRYPOINT.
+ */
+
+int load_elf(struct vnode *v, vaddr_t *entrypoint);
+
+
+#endif /* _ADDRSPACE_H_ */