[ARM] 5383/2: unwind: Add core support for ARM stack unwinding

This patch adds the main functionality for parsing the stack unwinding
information generated by the ARM EABI toolchains. The unwinding
information consists of an index with a pair of words per function and a
table with unwinding instructions. For more information, see "Exception
Handling ABI for the ARM Architecture" at:

http://infocenter.arm.com/help/topic/com.arm.doc.subset.swdev.abi/index.html

Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>

1 files changed, 3 insertions, 0 deletions

diff --git a/arch/arm/kernel/setup.c b/arch/arm/kernel/setup.c
index 645ec7436681..8d21427bb679 100644
--- a/arch/arm/kernel/setup.c
+++ b/arch/arm/kernel/setup.c
@@ -40,6 +40,7 @@
 #include <asm/mach/irq.h>
 #include <asm/mach/time.h>
 #include <asm/traps.h>
+#include <asm/unwind.h>
 
 #include "compat.h"
 #include "atags.h"
@@ -684,6 +685,8 @@ void __init setup_arch(char **cmdline_p)
         struct machine_desc *mdesc;
         char *from = default_command_line;
 
+        unwind_init();
+
         setup_processor();
         mdesc = setup_machine(machine_arch_type);
         machine_name = mdesc->name;