Removed unnecessary printks, fixed few minor issues.

src/api/ipc.c

@@ -46,8 +46,15 @@ int sys_ipc_control(struct syscall_args *regs)
 int ipc_send(l4id_t recv_tid)
 {
 	struct ktcb *receiver = find_task(recv_tid);
-	struct waitqueue_head *wqhs = &receiver->wqh_send;
-	struct waitqueue_head *wqhr = &receiver->wqh_recv;
+	struct waitqueue_head *wqhs, *wqhr;
+
+	if (!receiver) {
+		printk("%s: tid: %d, no such task.\n", __FUNCTION__,
+		       recv_tid);
+		return -EINVAL;
+	}
+	wqhs = &receiver->wqh_send;
+	wqhr = &receiver->wqh_recv;
 
 	spin_lock(&wqhs->slock);
 	spin_lock(&wqhr->slock);

src/api/thread.c

@@ -83,29 +83,19 @@ int thread_create(struct task_ids *ids)
 	copy_pgd_kern_all(new->pgd);
 
 	/* Get new space id */
-	if (ids->spid == TASK_ID_INVALID) {
+	if (ids->spid == TASK_ID_INVALID)
 		ids->spid = id_new(space_id_pool);
-		printk("Got new space id: %d\n", ids->spid);
-	} else {
-		printk("Try new space id: %d\n", ids->spid);
+	else
 		if ((ids->spid = id_get(space_id_pool, ids->spid)) < 0)
 			ids->spid = id_new(space_id_pool);
-		else
-			printk("Success.\n");
-	}
 
 spc_found:
 	/* Get a new thread id */
-	if (ids->tid == TASK_ID_INVALID) {
+	if (ids->tid == TASK_ID_INVALID)
 		ids->tid = id_new(thread_id_pool);
-		printk("Got new thread id: %d\n", ids->tid);
-	} else {
-		printk("Try new thread id: %d\n", ids->tid);
+	else
 		if ((ids->tid = id_get(thread_id_pool, ids->tid)) < 0)
 			ids->tid = id_new(thread_id_pool);
-		else
-			printk("Success.\n");
-	}
 
 	/* Set all ids */
 	set_task_ids(new, ids);

src/arch/arm/exception.c

@@ -91,22 +91,22 @@ int check_aborts(u32 faulted_pc, u32 fsr, u32 far)
 	int ret = 0;
 
 	if (is_prefetch_abort(fsr)) {
-		dprintk("Prefetch abort @ ", faulted_pc);
+	//	dprintk("Prefetch abort @ ", faulted_pc);
 		return 0;
 	}
 
 	switch (fsr & ARM_FSR_MASK) {
 	/* Aborts that are expected on page faults: */
 	case DABT_PERM_PAGE:
-		dprintk("Page permission fault @ ", far);
+//		dprintk("Page permission fault @ ", far);
 		ret = 0;
 		break;
 	case DABT_XLATE_PAGE:
-		dprintk("Page translation fault @ ", far);
+//		dprintk("Page translation fault @ ", far);
 		ret = 0;
 		break;
 	case DABT_XLATE_SECT:
-		dprintk("Section translation fault @ ", far);
+//		dprintk("Section translation fault @ ", far);
 		ret = 0;
 		break;
 
@@ -175,7 +175,7 @@ int check_aborts(u32 faulted_pc, u32 fsr, u32 far)
 void data_abort_handler(u32 faulted_pc, u32 fsr, u32 far)
 {
 	set_abort_type(fsr, ARM_DABT);
-	dprintk("Data abort @ PC: ", faulted_pc);
+	// dprintk("Data abort @ PC: ", faulted_pc);
 	if (check_aborts(faulted_pc, fsr, far) < 0) {
 		printascii("This abort can't be handled by any pager.\n");
 		goto error;

src/generic/space.c

@@ -25,6 +25,7 @@ int check_access(unsigned long vaddr, unsigned long size, unsigned int flags)
 	/* Do not allow ridiculously big sizes */
 	if (size >= USER_AREA_SIZE)
 		return -EINVAL;
+
 	/* Check if in user range, but this is more up to the pager to decide */
 	if (current->tid == PAGER_TID) {
 		if (!(vaddr >= INITTASK_AREA_START && vaddr < INITTASK_AREA_END))

tasks/fs0/include/task.h

@@ -6,8 +6,9 @@
 
 #include <lib/idpool.h>
 #include <l4/lib/list.h>
+#include <l4/api/kip.h>
 
-#define __TASKNAME__			"FS0"
+#define __TASKNAME__			__VFSNAME__
 
 #define TASK_OFILES_MAX			32
 
@@ -20,6 +21,6 @@ struct tcb {
 };
 
 struct tcb *find_task(int tid);
-void init_task_data(void);
+int init_task_data(void);
 
 #endif /* __FS0_TASK_H__ */

tasks/fs0/main.c

@@ -71,7 +71,7 @@ void handle_fs_requests(void)
 
 void main(void)
 {
-	printf("\n\n%s: Started with tid: %d\n", __TASKNAME__, self_tid());
+	printf("\n%s: Started with tid: %d\n", __TASKNAME__, self_tid());
 
 	initialise();
 

tasks/fs0/src/syscalls.c

@@ -8,11 +8,11 @@
 #include <l4lib/ipcdefs.h>
 #include <l4lib/arch/syscalls.h>
 #include <l4lib/arch/syslib.h>
-#include <vfs.h>
 #include <lib/malloc.h>
 #include <string.h>
 #include <stdio.h>
 #include <task.h>
+#include <vfs.h>
 
 /*
  * This notifies mm0 that this is the fd that refers to this vnode number
@@ -26,9 +26,9 @@ int send_pager_opendata(l4id_t sender, int fd, unsigned long vnum)
 {
 	int err;
 
-	write_mr(L4SYS_ARG0, sender);
-	write_mr(L4SYS_ARG1, fd);
-	write_mr(L4SYS_ARG2, vnum);
+	write_mr(sender, L4SYS_ARG0);
+	write_mr(fd, L4SYS_ARG1);
+	write_mr(vnum, L4SYS_ARG2);
 
 	if ((err = l4_send(PAGER_TID, L4_IPC_TAG_OPENDATA)) < 0) {
 		printf("%s: L4 IPC Error: %d.\n", __FUNCTION__, err);

tasks/fs0/src/task.c

@@ -56,10 +56,13 @@ int receive_pager_taskdata(l4id_t *tdata)
 		       __FUNCTION__);
 		BUG();
 	}
+	// printf("%s: %d Total tasks.\n", __FUNCTION__, tdata[0]);
 
 	/* Now read task ids. */
-	for (int i = 0; i < (int)tdata[0]; i++)
+	for (int i = 0; i < (int)tdata[0]; i++) {
 		tdata[1 + i] = (l4id_t)read_mr(L4SYS_ARG1 + i);
+		// printf("%s: Task id: %d\n", __FUNCTION__, tdata[1 + i]);
+	}
 
 	return 0;
 }
@@ -92,7 +95,7 @@ int init_task_structs(l4id_t *tdata)
 	return 0;
 }
 
-void init_task_data(void)
+int init_task_data(void)
 {
 	l4id_t tdata[MR_UNUSED_TOTAL];
 
@@ -102,6 +105,8 @@ void init_task_data(void)
 	BUG_ON(receive_pager_taskdata(tdata) < 0);
 
 	/* Initialise local task structs using this info */
-	init_task_structs(tdata);
+	BUG_ON(init_task_structs(tdata) < 0);
+
+	return 0;
 }
 

tasks/mm0/src/arch-arm/mm.c

@@ -51,9 +51,11 @@ void set_generic_fault_params(struct fault_data *fault)
 		else
 			BUG();
 	}
+	/*
 	printf("%s: Handling %s fault (%s abort) from %d. fault @ 0x%x\n",
 	       __TASKNAME__, (fault->reason & VM_READ) ? "read" : "write",
 	       is_prefetch_abort(fault->kdata->fsr) ? "prefetch" : "data",
 	       fault->task->tid, fault->address);
+	*/
 }
 

tasks/mm0/src/fault.c

@@ -118,8 +118,8 @@ int do_file_page(struct fault_data *fault)
 		BUG_ON(!list_empty(&page->list));
 		list_add(&page->list, &page->owner->page_cache_list);
 		spin_unlock(&page->lock);
-		printf("%s: Mapped new page @ 0x%x to task: %d\n", __TASKNAME__,
-		       fault->address, fault->task->tid);
+		//printf("%s: Mapped new page @ 0x%x to task: %d\n", __TASKNAME__,
+		//       fault->address, fault->task->tid);
 	/* Upgrade RO page to non-cow write */
 	} else if ((reason & VM_WRITE) && (pte_flags & VM_READ)
 		   && !(vma_flags & VMA_COW)) {

tasks/mm0/src/init.c

@@ -34,7 +34,7 @@ void init_mm(struct initdata *initdata)
 
 	/* Initialise the zero page */
 	init_devzero();
-	printf("%s: Initialised zero page.\n", __TASKNAME__);
+	printf("%s: Initialised devzero.\n", __TASKNAME__);
 
 	init_utcb();
 	printf("%s: Initialised own utcb.\n", __TASKNAME__);

tasks/mm0/src/task.c

@@ -207,13 +207,13 @@ void send_task_data(l4id_t requester)
 	}
 
 	/* First word is total number of tcbs */
-	write_mr(L4SYS_ARG0, tcb_head.total);
+	write_mr(tcb_head.total, L4SYS_ARG0);
 
 	/* Write each tcb's tid */
 	li = 0;
 	list_for_each_entry(t, &tcb_head.list, list) {
 		BUG_ON(li >= MR_USABLE_TOTAL);
-		write_mr(L4SYS_ARG1 + li, t->tid);
+		write_mr(t->tid, L4SYS_ARG1 + li);
 		li++;
 	}