Cleaned up all compile errors.

tasks/fs0/include/lib/idpool.h

@@ -2,6 +2,9 @@
 #define __MM0_IDPOOL_H__
 
 #include <lib/bit.h>
+#include <l4/macros.h>
+#include INC_GLUE(memory.h)
+#include <string.h>
 
 struct id_pool {
 	int nwords;
@@ -9,7 +12,7 @@ struct id_pool {
 };
 
 /* Copy one id pool to another by calculating its size */
-static inline void id_pool_copy(struct idpool *to, struct idpool *from, int totalbits)
+static inline void id_pool_copy(struct id_pool *to, struct id_pool *from, int totalbits)
 {
 	int nwords = BITWISE_GETWORD(totalbits);
 

tasks/fs0/include/syscalls.h

@@ -22,4 +22,8 @@ int pager_sys_write(l4id_t sender, unsigned long vnum, unsigned long f_offset,
 int pager_sys_close(l4id_t sender, l4id_t closer, int fd);
 int pager_update_stats(l4id_t sender, unsigned long vnum,
 		       unsigned long newsize);
+
+int pager_notify_fork(l4id_t sender, l4id_t parid,
+		      l4id_t chid, unsigned long utcb_address);
+
 #endif /* __FS0_SYSCALLS_H__ */

tasks/fs0/src/lib/idpool.c

@@ -10,12 +10,6 @@
 #include INC_GLUE(memory.h)
 #include <stdio.h>
 
-static inline void id_pool_copy(struct idpool *to, struct idpool *from, int totalbits)
-{
-	int nwords = BITWISE_GETWORD(totalbits);
-
-	memcpy(to, from, nwords * SZ_WORD + sizeof(struct id_pool));
-}
 struct id_pool *id_pool_new_init(int totalbits)
 {
 	int nwords = BITWISE_GETWORD(totalbits);

tasks/fs0/src/task.c

@@ -72,6 +72,22 @@ int receive_pager_taskdata_orig(l4id_t *tdata)
 	return 0;
 }
 
+/* Allocate a task struct and initialise it */
+struct tcb *create_tcb(void)
+{
+	struct tcb *t;
+
+	if (!(t = kmalloc(sizeof(*t))))
+		return PTR_ERR(-ENOMEM);
+
+	t->fdpool = id_pool_new_init(TASK_FILES_MAX);
+	INIT_LIST_HEAD(&t->list);
+	list_add_tail(&t->list, &tcb_head.list);
+	tcb_head.total++;
+
+	return t;
+}
+
 /*
  * Receives ipc from pager about a new fork event and
  * the information on the resulting child task.
@@ -80,7 +96,6 @@ int pager_notify_fork(l4id_t sender, l4id_t parid,
 		      l4id_t chid, unsigned long utcb_address)
 {
 	struct tcb *child, *parent;
-	int err;
 
 	// printf("%s/%s\n", __TASKNAME__, __FUNCTION__);
 	BUG_ON(!(parent = find_task(parid)));
@@ -136,22 +151,6 @@ struct task_data_head *receive_pager_taskdata(void)
 	return (struct task_data_head *)utcb_page;
 }
 
-/* Allocate a task struct and initialise it */
-struct tcb *create_tcb(void)
-{
-	struct tcb *t;
-
-	if (!(t = kmalloc(sizeof(*t))))
-		return PTR_ERR(-ENOMEM);
-
-	t->fdpool = id_pool_new_init(TASK_FILES_MAX);
-	INIT_LIST_HEAD(&t->list);
-	list_add_tail(&t->list, &tcb_head.list);
-	tcb_head.total++;
-
-	return t;
-}
-
 /* Attaches to task's utcb. FIXME: Add SHM_RDONLY and test it. */
 int task_utcb_attach(struct tcb *t)
 {

tasks/mm0/include/mmap.h

@@ -20,6 +20,9 @@
 #define MAP_SHARED	0x01
 #define MAP_PRIVATE	0x02
 
+struct vm_area *vma_new(unsigned long pfn_start, unsigned long npages,
+			unsigned int flags, unsigned long file_offset);
+
 int do_munmap(void *vaddr, unsigned long size, struct tcb *task);
 
 int do_mmap(struct vm_file *mapfile, unsigned long f_offset, struct tcb *t,

tasks/mm0/include/syscalls.h

@@ -10,6 +10,7 @@
 #define __MM0_SYSARGS_H__
 
 #include <sys/types.h>
+#include <l4lib/types.h>
 
 /* For reading argument data from a system call */
 struct sys_mmap_args {
@@ -43,7 +44,7 @@ struct sys_shmget_args {
 
 int sys_shmget(key_t key, int size, int shmflg);
 
-int sys_fork(void);
+int sys_fork(l4id_t parent);
 
 #endif /* __MM0_SYSARGS_H__ */
 

tasks/mm0/include/task.h

@@ -10,7 +10,7 @@
 #include <l4/types.h>
 #include INC_GLUE(memlayout.h)
 #include <l4/lib/list.h>
-#include <l4lib/types.h>
+#include <l4lib/arch/types.h>
 #include <l4lib/utcb.h>
 #include <lib/addr.h>
 #include <l4/api/kip.h>

tasks/mm0/main.c

@@ -120,7 +120,7 @@ void handle_requests(void)
 			 args->flags, args->fd, __pfn(args->offset));
 		break;
 	}
-	case L4_IPC_TAG_MMAP: {
+	case L4_IPC_TAG_FORK: {
 		sys_fork(sender);
 		break;
 	}

tasks/mm0/src/clone.c

@@ -6,7 +6,12 @@
 #include <syscalls.h>
 #include <vm_area.h>
 #include <task.h>
-
+#include <mmap.h>
+#include <l4lib/arch/syslib.h>
+#include <l4lib/ipcdefs.h>
+#include <l4/api/thread.h>
+#include <utcb.h>
+#include <shm.h>
 
 /*
  * Copy all vmas from the given task and populate each with
@@ -16,10 +21,10 @@
  */
 int copy_vmas(struct tcb *to, struct tcb *from)
 {
-	struct vm_area *vma, new_vma;
+	struct vm_area *vma, *new_vma;
 	struct vm_obj_link *vmo_link, *new_link;
 
-	list_for_each_entry(vma, from->vm_area_list, list) {
+	list_for_each_entry(vma, &from->vm_area_list, list) {
 
 		/* Create a new vma */
 		new_vma = vma_new(vma->pfn_start, vma->pfn_end - vma->pfn_start,
@@ -44,7 +49,7 @@ int copy_vmas(struct tcb *to, struct tcb *from)
 						  &vma->vm_obj_list)));
 
 		/* All link copying is finished, now add the new vma to task */
-		list_add_tail(&vma_new->list, &to->vm_area_list);
+		list_add_tail(&new_vma->list, &to->vm_area_list);
 	}
 
 	return 0;
@@ -78,16 +83,16 @@ int copy_tcb(struct tcb *to, struct tcb *from)
 	/* Copy all file descriptors */
 	memcpy(to->fd, from->fd,
 	       TASK_FILES_MAX * sizeof(struct file_descriptor));
+
+	return 0;
 }
 
 /*
  * Sends vfs task information about forked child, and its utcb
  */
-void vfs_notify_fork(struct tcb *child, struct tcb *parent)
+int vfs_notify_fork(struct tcb *child, struct tcb *parent)
 {
 	int err;
-	struct task_data_head *tdata_head;
-	struct tcb *vfs;
 
 	printf("%s/%s\n", __TASKNAME__, __FUNCTION__);
 
@@ -96,7 +101,7 @@ void vfs_notify_fork(struct tcb *child, struct tcb *parent)
 	/* Write parent and child information */
 	write_mr(L4SYS_ARG0, parent->tid);
 	write_mr(L4SYS_ARG1, child->tid);
-	write_mr(L4SYS_ARG2, child->utcb);
+	write_mr(L4SYS_ARG2, (unsigned int)child->utcb);
 
 	if ((err = l4_sendrecv(VFS_TID, VFS_TID,
 			       L4_IPC_TAG_NOTIFY_FORK)) < 0) {
@@ -118,6 +123,7 @@ void vfs_notify_fork(struct tcb *child, struct tcb *parent)
 int do_fork(struct tcb *parent)
 {
 	struct tcb *child;
+	struct vm_file *utcb_shm;
 	struct task_ids ids = {
 		.tid = TASK_ID_INVALID,
 		.spid = parent->spid,
@@ -130,7 +136,7 @@ int do_fork(struct tcb *parent)
 	 * Create a new L4 thread with parent's page tables
 	 * kernel stack and kernel-side tcb copied
 	 */
-	child = task_create(&ids, THREAD_CREATE_COPYSPACE);
+	child = task_create(&ids, THREAD_CREATE_COPYSPC);
 
 	/* Copy parent tcb to child */
 	copy_tcb(child, parent);
@@ -142,9 +148,9 @@ int do_fork(struct tcb *parent)
 	 * Create the utcb shared memory segment
 	 * available for child to shmat()
 	 */
-	if (IS_ERR(shm = shm_new((key_t)child->utcb,
-				 __pfn(DEFAULT_UTCB_SIZE)))) {
-		l4_ipc_return((int)shm);
+	if (IS_ERR(utcb_shm = shm_new((key_t)child->utcb,
+				      __pfn(DEFAULT_UTCB_SIZE)))) {
+		l4_ipc_return((int)utcb_shm);
 		return 0;
 	}
 	/* FIXME: We should munmap() parent's utcb page from child */
@@ -153,7 +159,7 @@ int do_fork(struct tcb *parent)
 	vfs_notify_fork(child, parent);
 
 	/* Start forked child. */
-	l4_thread_control(THREAD_RUN, ids);
+	l4_thread_control(THREAD_RUN, &ids);
 
 	/* Return back to parent */
 	l4_ipc_return(child->tid);
@@ -161,3 +167,11 @@ int do_fork(struct tcb *parent)
 	return 0;
 }
 
+int sys_fork(l4id_t sender)
+{
+	struct tcb *parent;
+
+	BUG_ON(!(parent = find_task(sender)));
+
+	return do_fork(parent);
+}

tasks/mm0/src/fault.c

@@ -543,7 +543,7 @@ int vm_freeze_shadows(struct tcb *task)
 
 					/* Map the page as read-only */
 					l4_map((void *)page_to_phys(p),
-					       (void *)virtual,
+					       (void *)virtual, 1,
 					       MAP_USR_RO_FLAGS, task->tid);
 				}
 				break;