csky: stacktrace supported. (0ea2dc7c) · Commits · 戴 / test

arch/csky/Kconfig

+3 −0

Original line number	Diff line number	Diff line
		@@ -94,6 +94,9 @@ config MMU
		config RWSEM_GENERIC_SPINLOCK
		def_bool y

		config STACKTRACE_SUPPORT
		def_bool y

		config TIME_LOW_RES
		def_bool y

+4 −0

Original line number	Diff line number	Diff line
		@@ -47,6 +47,10 @@ ifeq ($(CSKYABI),abiv2)
		KBUILD_CFLAGS += -mno-stack-size
		endif

		ifdef CONFIG_STACKTRACE
		KBUILD_CFLAGS += -mbacktrace
		endif

		abidirs := $(patsubst %,arch/csky/%/,$(CSKYABI))
		KBUILD_CFLAGS += $(patsubst %,-I$(srctree)/%inc,$(abidirs))

+4 −0

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		@@ -10,6 +10,7 @@
		#include <asm/types.h>
		#include <asm/page.h>
		#include <asm/processor.h>
		#include <abi/switch_context.h>

		struct thread_info {
		struct task_struct *task;
		@@ -36,6 +37,9 @@ struct thread_info {

		#define THREAD_SIZE_ORDER (THREAD_SHIFT - PAGE_SHIFT)

		#define thread_saved_fp(tsk) \
		((unsigned long)(((struct switch_stack *)(tsk->thread.ksp))->r8))

		static inline struct thread_info *current_thread_info(void)
		{
		unsigned long sp;

+1 −0

Original line number	Diff line number	Diff line
		@@ -6,3 +6,4 @@ obj-y += process.o cpu-probe.o ptrace.o dumpstack.o

		obj-$(CONFIG_MODULES) += module.o
		obj-$(CONFIG_SMP) += smp.o
		obj-$(CONFIG_STACKTRACE) += stacktrace.o

+17 −12

Original line number	Diff line number	Diff line
		@@ -93,26 +93,31 @@ int dump_task_regs(struct task_struct tsk, elf_gregset_t pr_regs)

		unsigned long get_wchan(struct task_struct *p)
		{
		unsigned long esp, pc;
		unsigned long stack_page;
		unsigned long lr;
		unsigned long fp, stack_start, *stack_end;
		int count = 0;

		if (!p \|\| p == current \|\| p->state == TASK_RUNNING)
		return 0;

		stack_page = (unsigned long)p;
		esp = p->thread.esp0;
		stack_start = (unsigned long *)end_of_stack(p);
		stack_end = (unsigned long *)(task_stack_page(p) + THREAD_SIZE);

		fp = (unsigned long *) thread_saved_fp(p);
		do {
		if (esp < stack_page+sizeof(struct task_struct) \|\|
		esp >= 8184+stack_page)
		if (fp < stack_start \|\| fp > stack_end)
		return 0;
		/FIXME: There's may be error here!/
		pc = ((unsigned long *)esp)[1];
		/* FIXME: This depends on the order of these functions. */
		if (!in_sched_functions(pc))
		return pc;
		esp = (unsigned long ) esp;
		#ifdef CONFIG_STACKTRACE
		lr = fp[1];
		fp = (unsigned long *)fp[0];
		#else
		lr = *fp++;
		#endif
		if (!in_sched_functions(lr) &&
		__kernel_text_address(lr))
		return lr;
		} while (count++ < 16);

		return 0;
		}
		EXPORT_SYMBOL(get_wchan);