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-rw-r--r--arch/sh/Kconfig.debug20
-rw-r--r--arch/sh/Makefile4
-rw-r--r--arch/sh/boot/compressed/Makefile2
-rw-r--r--arch/sh/kernel/irq.c17
-rw-r--r--arch/sh/kernel/sh_ksyms_32.c4
-rw-r--r--arch/sh/lib/Makefile3
-rw-r--r--arch/sh/lib/mcount.S83
7 files changed, 60 insertions, 73 deletions
diff --git a/arch/sh/Kconfig.debug b/arch/sh/Kconfig.debug
index 52a132c24aa..b440fd93671 100644
--- a/arch/sh/Kconfig.debug
+++ b/arch/sh/Kconfig.debug
@@ -61,12 +61,14 @@ config EARLY_PRINTK
select both the EARLY_SCIF_CONSOLE and SH_STANDARD_BIOS, using
the kernel command line option to toggle back and forth.
-config DEBUG_STACKOVERFLOW
+config STACK_DEBUG
bool "Check for stack overflows"
depends on DEBUG_KERNEL && SUPERH32
help
This option will cause messages to be printed if free stack space
- drops below a certain limit.
+ drops below a certain limit. Saying Y here will add overhead to
+ every function call and will therefore incur a major
+ performance hit. Most users should say N.
config DEBUG_STACK_USAGE
bool "Stack utilization instrumentation"
@@ -123,15 +125,9 @@ config SH64_SR_WATCH
bool "Debug: set SR.WATCH to enable hardware watchpoints and trace"
depends on SUPERH64
-config STACK_DEBUG
- bool "Enable diagnostic checks of the kernel stack"
- depends on FUNCTION_TRACER
- select DEBUG_STACKOVERFLOW
- default n
- help
- This option allows checks to be performed on the kernel stack
- at runtime. Saying Y here will add overhead to every function
- call and will therefore incur a major performance hit. Most
- users should say N.
+config MCOUNT
+ def_bool y
+ depends on SUPERH32
+ depends on STACK_DEBUG || FUNCTION_TRACER
endmenu
diff --git a/arch/sh/Makefile b/arch/sh/Makefile
index 75d049b03f7..52c34bf5696 100644
--- a/arch/sh/Makefile
+++ b/arch/sh/Makefile
@@ -186,6 +186,10 @@ KBUILD_CFLAGS += -pipe $(cflags-y)
KBUILD_CPPFLAGS += $(cflags-y)
KBUILD_AFLAGS += $(cflags-y)
+ifeq ($(CONFIG_MCOUNT),y)
+ KBUILD_CFLAGS += -pg
+endif
+
libs-$(CONFIG_SUPERH32) := arch/sh/lib/ $(libs-y)
libs-$(CONFIG_SUPERH64) := arch/sh/lib64/ $(libs-y)
diff --git a/arch/sh/boot/compressed/Makefile b/arch/sh/boot/compressed/Makefile
index 3324019e207..59e2937caa2 100644
--- a/arch/sh/boot/compressed/Makefile
+++ b/arch/sh/boot/compressed/Makefile
@@ -24,7 +24,7 @@ IMAGE_OFFSET := $(shell /bin/bash -c 'printf "0x%08x" \
LIBGCC := $(shell $(CC) $(KBUILD_CFLAGS) -print-libgcc-file-name)
-ifeq ($(CONFIG_FUNCTION_TRACER),y)
+ifeq ($(CONFIG_MCOUNT),y)
ORIG_CFLAGS := $(KBUILD_CFLAGS)
KBUILD_CFLAGS = $(subst -pg, , $(ORIG_CFLAGS))
endif
diff --git a/arch/sh/kernel/irq.c b/arch/sh/kernel/irq.c
index 3d09062f468..278c68c6048 100644
--- a/arch/sh/kernel/irq.c
+++ b/arch/sh/kernel/irq.c
@@ -114,23 +114,6 @@ asmlinkage int do_IRQ(unsigned int irq, struct pt_regs *regs)
#endif
irq_enter();
-
-#ifdef CONFIG_DEBUG_STACKOVERFLOW
- /* Debugging check for stack overflow: is there less than 1KB free? */
- {
- long sp;
-
- __asm__ __volatile__ ("and r15, %0" :
- "=r" (sp) : "0" (THREAD_SIZE - 1));
-
- if (unlikely(sp < (sizeof(struct thread_info) + STACK_WARN))) {
- printk("do_IRQ: stack overflow: %ld\n",
- sp - sizeof(struct thread_info));
- dump_stack();
- }
- }
-#endif
-
irq = irq_demux(intc_evt2irq(irq));
#ifdef CONFIG_IRQSTACKS
diff --git a/arch/sh/kernel/sh_ksyms_32.c b/arch/sh/kernel/sh_ksyms_32.c
index fcc5de31f83..cec610888e2 100644
--- a/arch/sh/kernel/sh_ksyms_32.c
+++ b/arch/sh/kernel/sh_ksyms_32.c
@@ -106,8 +106,8 @@ EXPORT_SYMBOL(flush_dcache_page);
EXPORT_SYMBOL(clear_user_page);
#endif
-#ifdef CONFIG_FUNCTION_TRACER
-EXPORT_SYMBOL(mcount);
+#ifdef CONFIG_MCOUNT
+DECLARE_EXPORT(mcount);
#endif
EXPORT_SYMBOL(csum_partial);
EXPORT_SYMBOL(csum_partial_copy_generic);
diff --git a/arch/sh/lib/Makefile b/arch/sh/lib/Makefile
index 19328d90a2d..c2b28d8b2dd 100644
--- a/arch/sh/lib/Makefile
+++ b/arch/sh/lib/Makefile
@@ -24,8 +24,7 @@ memcpy-y := memcpy.o
memcpy-$(CONFIG_CPU_SH4) := memcpy-sh4.o
lib-$(CONFIG_MMU) += copy_page.o clear_page.o
-lib-$(CONFIG_FUNCTION_TRACER) += mcount.o
-lib-$(CONFIG_FUNCTION_GRAPH_TRACER) += mcount.o
+lib-$(CONFIG_MCOUNT) += mcount.o
lib-y += $(memcpy-y) $(udivsi3-y)
EXTRA_CFLAGS += -Werror
diff --git a/arch/sh/lib/mcount.S b/arch/sh/lib/mcount.S
index bd3ec648bec..84a57761f17 100644
--- a/arch/sh/lib/mcount.S
+++ b/arch/sh/lib/mcount.S
@@ -1,7 +1,7 @@
/*
* arch/sh/lib/mcount.S
*
- * Copyright (C) 2008 Paul Mundt
+ * Copyright (C) 2008, 2009 Paul Mundt
* Copyright (C) 2008, 2009 Matt Fleming
*
* This file is subject to the terms and conditions of the GNU General Public
@@ -86,13 +86,18 @@
.type mcount,@function
_mcount:
mcount:
+ STACK_CHECK()
+
+#ifndef CONFIG_FUNCTION_TRACER
+ rts
+ nop
+#else
#ifndef CONFIG_DYNAMIC_FTRACE
mov.l .Lfunction_trace_stop, r0
mov.l @r0, r0
tst r0, r0
bf ftrace_stub
#endif
- STACK_CHECK()
MCOUNT_ENTER()
@@ -174,8 +179,6 @@ ftrace_caller:
tst r0, r0
bf ftrace_stub
- STACK_CHECK()
-
MCOUNT_ENTER()
.globl ftrace_call
@@ -192,6 +195,10 @@ ftrace_call:
#endif /* CONFIG_FUNCTION_GRAPH_TRACER */
#endif /* CONFIG_DYNAMIC_FTRACE */
+ .align 2
+.Lfunction_trace_stop:
+ .long function_trace_stop
+
/*
* NOTE: From here on the locations of the .Lftrace_stub label and
* ftrace_stub itself are fixed. Adding additional data here will skew
@@ -199,7 +206,6 @@ ftrace_call:
* Place new labels either after the ftrace_stub body, or before
* ftrace_caller. You have been warned.
*/
- .align 2
.Lftrace_stub:
.long ftrace_stub
@@ -208,40 +214,6 @@ ftrace_stub:
rts
nop
-#ifdef CONFIG_STACK_DEBUG
- .globl stack_panic
-stack_panic:
- mov.l .Ldump_stack, r0
- jsr @r0
- nop
-
- mov.l .Lpanic, r0
- jsr @r0
- mov.l .Lpanic_s, r4
-
- rts
- nop
-
- .align 2
-.Lfunction_trace_stop:
- .long function_trace_stop
-.L_ebss:
- .long _ebss
-.L_init_thread_union:
- .long init_thread_union
-.Lpanic:
- .long panic
-.Lpanic_s:
- .long .Lpanic_str
-.Ldump_stack:
- .long dump_stack
-
- .section .rodata
- .align 2
-.Lpanic_str:
- .string "Stack error"
-#endif /* CONFIG_STACK_DEBUG */
-
#ifdef CONFIG_FUNCTION_GRAPH_TRACER
.globl ftrace_graph_caller
ftrace_graph_caller:
@@ -303,3 +275,36 @@ return_to_handler:
.Lftrace_return_to_handler:
.long ftrace_return_to_handler
#endif /* CONFIG_FUNCTION_GRAPH_TRACER */
+#endif /* CONFIG_FUNCTION_TRACER */
+
+#ifdef CONFIG_STACK_DEBUG
+ .globl stack_panic
+stack_panic:
+ mov.l .Ldump_stack, r0
+ jsr @r0
+ nop
+
+ mov.l .Lpanic, r0
+ jsr @r0
+ mov.l .Lpanic_s, r4
+
+ rts
+ nop
+
+ .align 2
+.L_ebss:
+ .long _ebss
+.L_init_thread_union:
+ .long init_thread_union
+.Lpanic:
+ .long panic
+.Lpanic_s:
+ .long .Lpanic_str
+.Ldump_stack:
+ .long dump_stack
+
+ .section .rodata
+ .align 2
+.Lpanic_str:
+ .string "Stack error"
+#endif /* CONFIG_STACK_DEBUG */
generated by cgit v1.2.3-70-g09d2 (git 2.46.0) at 2024-12-15 16:54:47 +0000