sh: Add a simple code dumper for SUPERH32 show_regs().

This implements a simple show_code() that is in turn plugged in to
show_regs() to provide minimal code dumping at the end of the trace.

Built on top of a simple instruction disassembler derived from the
binutils opcode table.
Signed-off-by: Paul Mundt <lethal@linux-sh.org>

arch/sh/include/asm/processor_32.h

@@ -175,6 +175,7 @@ static __inline__ void enable_fpu(void)
 
 void show_trace(struct task_struct *tsk, unsigned long *sp,
 		struct pt_regs *regs);
+void show_code(struct pt_regs *regs);
 extern unsigned long get_wchan(struct task_struct *p);
 
 #define KSTK_EIP(tsk)  (task_pt_regs(tsk)->pc)

arch/sh/kernel/Makefile_32

@@ -9,9 +9,10 @@ ifdef CONFIG_FUNCTION_TRACER
 CFLAGS_REMOVE_ftrace.o = -pg
 endif
 
-obj-y	:= debugtraps.o io.o io_generic.o irq.o machvec.o process_32.o \
-	   ptrace_32.o setup.o signal_32.o sys_sh.o sys_sh32.o \
-	   syscalls_32.o time_32.o topology.o traps.o traps_32.o
+obj-y	:= debugtraps.o disassemble.o io.o io_generic.o irq.o		\
+	   machvec.o process_32.o ptrace_32.o setup.o signal_32.o	\
+	   sys_sh.o sys_sh32.o syscalls_32.o time_32.o topology.o	\
+	   traps.o traps_32.o
 
 obj-y				+= cpu/ timers/
 obj-$(CONFIG_VSYSCALL)		+= vsyscall/

arch/sh/kernel/process_32.c

@@ -148,6 +148,7 @@ void show_regs(struct pt_regs * regs)
 	       regs->mach, regs->macl, regs->gbr, regs->pr);
 
 	show_trace(NULL, (unsigned long *)regs->regs[15], regs);
+	show_code(regs);
 }
 
 /*