---

yaml --- r: 173400 b: refs/heads/master c: ac4fac8 h: refs/heads/master v: v3
git-mirror · Oct 13, 2009 · b1ff8f8 · b1ff8f8
1 parent bbfdaf6
commit b1ff8f8
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Showing 5 changed files with 69 additions and 43 deletions.
diff --git a/[refs] b/[refs]
@@ -1,2 +1,2 @@
 ---
-refs/heads/master: 5852b203ef1b85a8eacc1cc686ed9bac11ee31cc
+refs/heads/master: ac4fac8cb24ab209ae373a3e3e9995dff7d0c394
diff --git a/trunk/arch/sh/include/asm/dwarf.h b/trunk/arch/sh/include/asm/dwarf.h
@@ -194,6 +194,11 @@
 #define DWARF_ARCH_RA_REG	17
 
 #ifndef __ASSEMBLY__
+
+#include <linux/compiler.h>
+#include <linux/bug.h>
+#include <linux/list.h>
+
 /*
  * Read either the frame pointer (r14) or the stack pointer (r15).
  * NOTE: this MUST be inlined.

diff --git a/trunk/arch/sh/include/asm/ftrace.h b/trunk/arch/sh/include/asm/ftrace.h
@@ -32,52 +32,18 @@ static inline unsigned long ftrace_call_adjust(unsigned long addr)
 	return addr;
 }
 
-
-#ifdef CONFIG_DWARF_UNWINDER
-#include <asm/dwarf.h>
+/* arch/sh/kernel/return_address.c */
+extern void *return_address(unsigned int);
 
 #define HAVE_ARCH_CALLER_ADDR
 
-static inline unsigned long dwarf_return_address(int depth)
-{
-	struct dwarf_frame *frame;
-	unsigned long ra;
-	int i;
-
-	for (i = 0, frame = NULL, ra = 0; i <= depth; i++) {
-		struct dwarf_frame *tmp;
-
-		tmp = dwarf_unwind_stack(ra, frame);
-
-		if (frame)
-			dwarf_free_frame(frame);
-
-		frame = tmp;
-
-		if (!frame || !frame->return_addr)
-			break;
-
-		ra = frame->return_addr;
-	}
-
-	/* Failed to unwind the stack to the specified depth. */
-	WARN_ON(i != depth + 1);
-
-	if (frame)
-		dwarf_free_frame(frame);
-
-	return ra;
-}
-
 #define CALLER_ADDR0 ((unsigned long)__builtin_return_address(0))
-#define CALLER_ADDR1 dwarf_return_address(1)
-#define CALLER_ADDR2 dwarf_return_address(2)
-#define CALLER_ADDR3 dwarf_return_address(3)
-#define CALLER_ADDR4 dwarf_return_address(4)
-#define CALLER_ADDR5 dwarf_return_address(5)
-#define CALLER_ADDR6 dwarf_return_address(6)
-
-#endif /* CONFIG_DWARF_UNWINDER */
+#define CALLER_ADDR1 ((unsigned long)return_address(1))
+#define CALLER_ADDR2 ((unsigned long)return_address(2))
+#define CALLER_ADDR3 ((unsigned long)return_address(3))
+#define CALLER_ADDR4 ((unsigned long)return_address(4))
+#define CALLER_ADDR5 ((unsigned long)return_address(5))
+#define CALLER_ADDR6 ((unsigned long)return_address(6))
 
 #endif /* __ASSEMBLY__ */
 #endif /* CONFIG_FUNCTION_TRACER */

diff --git a/trunk/arch/sh/kernel/Makefile b/trunk/arch/sh/kernel/Makefile
@@ -11,6 +11,7 @@ endif
 
 obj-y	:= debugtraps.o dumpstack.o idle.o io.o io_generic.o irq.o	\
 	   machvec.o nmi_debug.o process_$(BITS).o ptrace_$(BITS).o	\
+	   return_address.o						\
 	   setup.o signal_$(BITS).o sys_sh.o sys_sh$(BITS).o		\
 	   syscalls_$(BITS).o time.o topology.o traps.o			\
 	   traps_$(BITS).o unwinder.o

diff --git a/trunk/arch/sh/kernel/return_address.c b/trunk/arch/sh/kernel/return_address.c
@@ -0,0 +1,54 @@
+/*
+ * arch/sh/kernel/return_address.c
+ *
+ * Copyright (C) 2009  Matt Fleming
+ * Copyright (C) 2009  Paul Mundt
+ *
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License.  See the file "COPYING" in the main directory of this archive
+ * for more details.
+ */
+#include <linux/kernel.h>
+#include <asm/dwarf.h>
+
+#ifdef CONFIG_DWARF_UNWINDER
+
+void *return_address(unsigned int depth)
+{
+	struct dwarf_frame *frame;
+	unsigned long ra;
+	int i;
+
+	for (i = 0, frame = NULL, ra = 0; i <= depth; i++) {
+		struct dwarf_frame *tmp;
+
+		tmp = dwarf_unwind_stack(ra, frame);
+
+		if (frame)
+			dwarf_free_frame(frame);
+
+		frame = tmp;
+
+		if (!frame || !frame->return_addr)
+			break;
+
+		ra = frame->return_addr;
+	}
+
+	/* Failed to unwind the stack to the specified depth. */
+	WARN_ON(i != depth + 1);
+
+	if (frame)
+		dwarf_free_frame(frame);
+
+	return (void *)ra;
+}
+
+#else
+
+void *return_address(unsigned int depth)
+{
+	return NULL;
+}
+
+#endif