ARC: DWARF2 .debug_frame based stack unwinder
-Originally written by Rajeshwar Ranga
-Derived off of generic unwinder in 2.6.19 and adapted to ARC
Signed-off-by: Vineet Gupta <vgupta@synopsys.com>
Cc: Rajeshwar Ranga <rajeshwar.ranga@gmail.com>
diff --git a/arch/arc/Kconfig b/arch/arc/Kconfig
index 52f5c07..0979d8e 100644
--- a/arch/arc/Kconfig
+++ b/arch/arc/Kconfig
@@ -25,6 +25,7 @@
select HAVE_ARCH_TRACEHOOK
select HAVE_GENERIC_HARDIRQS
select HAVE_MEMBLOCK
+ select HAVE_MOD_ARCH_SPECIFIC if ARC_DW2_UNWIND
select HAVE_OPROFILE
select IRQ_DOMAIN
select MODULES_USE_ELF_RELA
@@ -344,6 +345,20 @@
bool "ARC debugging"
default y
+config ARC_DW2_UNWIND
+ bool "Enable DWARF specific kernel stack unwind"
+ depends on ARC_DBG
+ default y
+ select KALLSYMS
+ help
+ Compiles the kernel with DWARF unwind information and can be used
+ to get stack backtraces.
+
+ If you say Y here the resulting kernel image will be slightly larger
+ but not slower, and it will give very useful debugging information.
+ If you don't debug the kernel, you can say N, but we may not be able
+ to solve problems without frame unwind information
+
config ARC_DBG_TLB_PARANOIA
bool "Paranoia Checks in Low Level TLB Handlers"
depends on ARC_DBG && !SMP