Merge branch 'sh/multi-unwinders' into sh-latest

arch/sh/kernel/cpu/sh5/unwind.c

@@ -16,6 +16,8 @@
 #include <asm/ptrace.h>
 #include <asm/processor.h>
 #include <asm/io.h>
+#include <asm/unwinder.h>
+#include <asm/stacktrace.h>
 
 static u8 regcache[63];
 
@@ -199,8 +201,11 @@ static int lookup_prev_stack_frame(unsigned long fp, unsigned long pc,
 	return 0;
 }
 
-/* Don't put this on the stack since we'll want to call sh64_unwind
- * when we're close to underflowing the stack anyway. */
+/*
+ * Don't put this on the stack since we'll want to call in to
+ * sh64_unwinder_dump() when we're close to underflowing the stack
+ * anyway.
+ */
 static struct pt_regs here_regs;
 
 extern const char syscall_ret;
@@ -208,17 +213,19 @@ extern const char ret_from_syscall;
 extern const char ret_from_exception;
 extern const char ret_from_irq;
 
-static void sh64_unwind_inner(struct pt_regs *regs);
+static void sh64_unwind_inner(const struct stacktrace_ops *ops,
+			      void *data, struct pt_regs *regs);
 
-static void unwind_nested (unsigned long pc, unsigned long fp)
+static inline void unwind_nested(const struct stacktrace_ops *ops, void *data,
+				 unsigned long pc, unsigned long fp)
 {
 	if ((fp >= __MEMORY_START) &&
-	    ((fp & 7) == 0)) {
-		sh64_unwind_inner((struct pt_regs *) fp);
-	}
+	    ((fp & 7) == 0))
+		sh64_unwind_inner(ops, data, (struct pt_regs *)fp);
 }
 
-static void sh64_unwind_inner(struct pt_regs *regs)
+static void sh64_unwind_inner(const struct stacktrace_ops *ops,
+			      void *data, struct pt_regs *regs)
 {
 	unsigned long pc, fp;
 	int ofs = 0;
@@ -232,29 +239,29 @@ static void sh64_unwind_inner(struct pt_regs *regs)
 		int cond;
 		unsigned long next_fp, next_pc;
 
-		if (pc == ((unsigned long) &syscall_ret & ~1)) {
+		if (pc == ((unsigned long)&syscall_ret & ~1)) {
 			printk("SYSCALL\n");
-			unwind_nested(pc,fp);
+			unwind_nested(ops, data, pc, fp);
 			return;
 		}
 
-		if (pc == ((unsigned long) &ret_from_syscall & ~1)) {
+		if (pc == ((unsigned long)&ret_from_syscall & ~1)) {
 			printk("SYSCALL (PREEMPTED)\n");
-			unwind_nested(pc,fp);
+			unwind_nested(ops, data, pc, fp);
 			return;
 		}
 
 		/* In this case, the PC is discovered by lookup_prev_stack_frame but
 		   it has 4 taken off it to look like the 'caller' */
-		if (pc == ((unsigned long) &ret_from_exception & ~1)) {
+		if (pc == ((unsigned long)&ret_from_exception & ~1)) {
 			printk("EXCEPTION\n");
-			unwind_nested(pc,fp);
+			unwind_nested(ops, data, pc, fp);
 			return;
 		}
 
-		if (pc == ((unsigned long) &ret_from_irq & ~1)) {
+		if (pc == ((unsigned long)&ret_from_irq & ~1)) {
 			printk("IRQ\n");
-			unwind_nested(pc,fp);
+			unwind_nested(ops, data, pc, fp);
 			return;
 		}
 
@@ -263,8 +270,7 @@ static void sh64_unwind_inner(struct pt_regs *regs)
 
 		pc -= ofs;
 
-		printk("[<%08lx>] ", pc);
-		print_symbol("%s\n", pc);
+		ops->address(data, pc, 1);
 
 		if (first_pass) {
 			/* If the innermost frame is a leaf function, it's
@@ -287,10 +293,13 @@ static void sh64_unwind_inner(struct pt_regs *regs)
 	}
 
 	printk("\n");
-
 }
 
-void sh64_unwind(struct pt_regs *regs)
+static void sh64_unwinder_dump(struct task_struct *task,
+			       struct pt_regs *regs,
+			       unsigned long *sp,
+			       const struct stacktrace_ops *ops,
+			       void *data)
 {
 	if (!regs) {
 		/*
@@ -320,7 +329,17 @@ void sh64_unwind(struct pt_regs *regs)
 		);
 	}
 
-	printk("\nCall Trace:\n");
-	sh64_unwind_inner(regs);
+	sh64_unwind_inner(ops, data, regs);
 }
 
+static struct unwinder sh64_unwinder = {
+	.name	= "sh64-unwinder",
+	.dump	= sh64_unwinder_dump,
+	.rating	= 150,
+};
+
+static int __init sh64_unwinder_init(void)
+{
+	return unwinder_register(&sh64_unwinder);
+}
+early_initcall(sh64_unwinder_init);