[POWERPC] Make xmon disassembly optional
While adding spu disassembly support it struck me that we're actually
carrying quite a lot of code around, just to do disassembly in the case
of a crash.
While on large systems it's not an issue, on smaller ones it might be
nice to have xmon - but without the weight of the disassembly support.
For a Cell build this saves ~230KB (!), and for pSeries ~195KB.
We still support the 'di' and 'sdi' commands, however they just dump
the instruction in hex.
Move the definitions into a header to clean xmon.c just a tiny bit.
Signed-off-by: Michael Ellerman <michael@ellerman.id.au>
Signed-off-by: Arnd Bergmann <arnd.bergmann@de.ibm.com>
diff --git a/arch/powerpc/Kconfig.debug b/arch/powerpc/Kconfig.debug
index 5ad149b..ff16063 100644
--- a/arch/powerpc/Kconfig.debug
+++ b/arch/powerpc/Kconfig.debug
@@ -98,6 +98,15 @@
xmon is normally disabled unless booted with 'xmon=on'.
Use 'xmon=off' to disable xmon init during runtime.
+config XMON_DISASSEMBLY
+ bool "Include disassembly support in xmon"
+ depends on XMON
+ default y
+ help
+ Include support for disassembling in xmon. You probably want
+ to say Y here, unless you're building for a memory-constrained
+ system.
+
config IRQSTACKS
bool "Use separate kernel stacks when processing interrupts"
depends on PPC64
diff --git a/arch/powerpc/xmon/Makefile b/arch/powerpc/xmon/Makefile
index 4f27405..6930357 100644
--- a/arch/powerpc/xmon/Makefile
+++ b/arch/powerpc/xmon/Makefile
@@ -3,6 +3,10 @@
ifdef CONFIG_PPC64
EXTRA_CFLAGS += -mno-minimal-toc
endif
-obj-y += xmon.o ppc-dis.o ppc-opc.o setjmp.o start.o \
- nonstdio.o
+
+obj-y += xmon.o setjmp.o start.o nonstdio.o
+
+ifdef CONFIG_XMON_DISASSEMBLY
+obj-y += ppc-dis.o ppc-opc.o
obj-$(CONFIG_PPC_CELL) += spu-dis.o spu-opc.o
+endif
diff --git a/arch/powerpc/xmon/dis-asm.h b/arch/powerpc/xmon/dis-asm.h
new file mode 100644
index 0000000..be3533b
--- /dev/null
+++ b/arch/powerpc/xmon/dis-asm.h
@@ -0,0 +1,31 @@
+#ifndef _POWERPC_XMON_DIS_ASM_H
+#define _POWERPC_XMON_DIS_ASM_H
+/*
+ * Copyright (C) 2006 Michael Ellerman, IBM Corporation.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version
+ * 2 of the License, or (at your option) any later version.
+ */
+
+extern void print_address (unsigned long memaddr);
+
+#ifdef CONFIG_XMON_DISASSEMBLY
+extern int print_insn_powerpc(unsigned long insn, unsigned long memaddr);
+extern int print_insn_spu(unsigned long insn, unsigned long memaddr);
+#else
+static inline int print_insn_powerpc(unsigned long insn, unsigned long memaddr)
+{
+ printf("%.8x", insn);
+ return 0;
+}
+
+static inline int print_insn_spu(unsigned long insn, unsigned long memaddr)
+{
+ printf("%.8x", insn);
+ return 0;
+}
+#endif
+
+#endif /* _POWERPC_XMON_DIS_ASM_H */
diff --git a/arch/powerpc/xmon/ppc-dis.c b/arch/powerpc/xmon/ppc-dis.c
index 3b67bee..0865274 100644
--- a/arch/powerpc/xmon/ppc-dis.c
+++ b/arch/powerpc/xmon/ppc-dis.c
@@ -21,8 +21,7 @@
#include "nonstdio.h"
#include "ansidecl.h"
#include "ppc.h"
-
-extern void print_address (unsigned long memaddr);
+#include "dis-asm.h"
/* Print a PowerPC or POWER instruction. */
diff --git a/arch/powerpc/xmon/spu-dis.c b/arch/powerpc/xmon/spu-dis.c
index 75ac081..ee929c6 100644
--- a/arch/powerpc/xmon/spu-dis.c
+++ b/arch/powerpc/xmon/spu-dis.c
@@ -22,8 +22,7 @@
#include "nonstdio.h"
#include "ansidecl.h"
#include "spu.h"
-
-extern void print_address (unsigned long memaddr);
+#include "dis-asm.h"
/* This file provides a disassembler function which uses
the disassembler interface defined in dis-asm.h. */
diff --git a/arch/powerpc/xmon/xmon.c b/arch/powerpc/xmon/xmon.c
index 7a0eec2..c999638 100644
--- a/arch/powerpc/xmon/xmon.c
+++ b/arch/powerpc/xmon/xmon.c
@@ -47,6 +47,7 @@
#endif
#include "nonstdio.h"
+#include "dis-asm.h"
#define scanhex xmon_scanhex
#define skipbl xmon_skipbl
@@ -110,7 +111,6 @@
static void dump(void);
static void prdump(unsigned long, long);
static int ppc_inst_dump(unsigned long, long, int);
-void print_address(unsigned long);
static void backtrace(struct pt_regs *);
static void excprint(struct pt_regs *);
static void prregs(struct pt_regs *);
@@ -154,9 +154,6 @@
int xmon_no_auto_backtrace;
-extern int print_insn_powerpc(unsigned long insn, unsigned long memaddr);
-extern int print_insn_spu(unsigned long insn, unsigned long memaddr);
-
extern void xmon_enter(void);
extern void xmon_leave(void);