X-Git-Url: http://git.onelab.eu/?a=blobdiff_plain;f=arch%2Fsh64%2Fmm%2Ffault.c;h=e3e90bf3187c739c6c8cf41adfc3ad4a012d1e23;hb=97bf2856c6014879bd04983a3e9dfcdac1e7fe85;hp=d1190b4158d8acbfbf340d2b56c2cc79865f6ab5;hpb=c7b5ebbddf7bcd3651947760f423e3783bbe6573;p=linux-2.6.git

diff --git a/arch/sh64/mm/fault.c b/arch/sh64/mm/fault.c
index d1190b415..e3e90bf31 100644
--- a/arch/sh64/mm/fault.c
+++ b/arch/sh64/mm/fault.c
@@ -82,7 +82,7 @@ static inline void print_vma(struct vm_area_struct *vma)
 
 static inline void print_task(struct task_struct *tsk)
 {
-	printk("Task pid %d\n", tsk->pid);
+	printk("Task pid %d:#%u\n", tsk->pid, tsk->xid);
 }
 
 static pte_t *lookup_pte(struct mm_struct *mm, unsigned long address)
@@ -148,13 +148,13 @@ asmlinkage void do_page_fault(struct pt_regs *regs, unsigned long writeaccess,
 	mm = tsk->mm;
 
 	/* Not an IO address, so reenable interrupts */
-	sti();
+	local_irq_enable();
 
 	/*
 	 * If we're in an interrupt or have no user
 	 * context, we must not take the fault..
 	 */
-	if (in_interrupt() || !mm)
+	if (in_atomic() || !mm)
 		goto no_context;
 
 	/* TLB misses upon some cache flushes get done under cli() */
@@ -203,17 +203,17 @@ asmlinkage void do_page_fault(struct pt_regs *regs, unsigned long writeaccess,
  * we can handle it..
  */
 good_area:
-	if (writeaccess) {
-		if (!(vma->vm_flags & VM_WRITE))
-			goto bad_area;
-	} else {
-		if (!(vma->vm_flags & (VM_READ | VM_EXEC)))
-			goto bad_area;
-	}
-
 	if (textaccess) {
 		if (!(vma->vm_flags & VM_EXEC))
 			goto bad_area;
+	} else {
+		if (writeaccess) {
+			if (!(vma->vm_flags & VM_WRITE))
+				goto bad_area;
+		} else {
+			if (!(vma->vm_flags & VM_READ))
+				goto bad_area;
+		}
 	}
 
 	/*
@@ -223,13 +223,13 @@ good_area:
 	 */
 survive:
 	switch (handle_mm_fault(mm, vma, address, writeaccess)) {
-	case 1:
+	case VM_FAULT_MINOR:
 		tsk->min_flt++;
 		break;
-	case 2:
+	case VM_FAULT_MAJOR:
 		tsk->maj_flt++;
 		break;
-	case 0:
+	case VM_FAULT_SIGBUS:
 		goto do_sigbus;
 	default:
 		goto out_of_memory;
@@ -264,17 +264,28 @@ bad_area:
 	up_read(&mm->mmap_sem);
 
 	if (user_mode(regs)) {
-		printk("user mode bad_area address=%08lx pid=%d (%s) pc=%08lx opcode=%08lx\n",
-			address, current->pid, current->comm,
-			(unsigned long) regs->pc,
-			*(unsigned long *)(u32)(regs->pc & ~3));
-		show_regs(regs);
-		if (tsk->pid == 1) {
+		static int count=0;
+		siginfo_t info;
+		if (count < 4) {
+			/* This is really to help debug faults when starting
+			 * usermode, so only need a few */
+			count++;
+			printk("user mode bad_area address=%08lx pid=%d (%s) pc=%08lx\n",
+				address, current->pid, current->comm,
+				(unsigned long) regs->pc);
+#if 0
+			show_regs(regs);
+#endif
+		}
+		if (is_init(tsk)) {
 			panic("INIT had user mode bad_area\n");
 		}
 		tsk->thread.address = address;
 		tsk->thread.error_code = writeaccess;
-		force_sig(SIGSEGV, tsk);
+		info.si_signo = SIGSEGV;
+		info.si_errno = 0;
+		info.si_addr = (void *) address;
+		force_sig_info(SIGSEGV, &info, tsk);
 		return;
 	}
 
@@ -308,19 +319,20 @@ no_context:
  * us unable to handle the page fault gracefully.
  */
 out_of_memory:
-	if (current->pid == 1) {
+	if (is_init(current)) {
 		panic("INIT out of memory\n");
 		yield();
 		goto survive;
 	}
 	printk("fault:Out of memory\n");
 	up_read(&mm->mmap_sem);
-	if (current->pid == 1) {
+	if (is_init(current)) {
 		yield();
 		down_read(&mm->mmap_sem);
 		goto survive;
 	}
-	printk("VM: killing process %s\n", tsk->comm);
+	printk("VM: killing process %s(%d:#%u)\n",
+		tsk->comm, tsk->pid, tsk->xid);
 	if (user_mode(regs))
 		do_exit(SIGKILL);
 	goto no_context;