arch/sh/kernel/dumpstack.c

Source file repositories/reference/linux-study-clean/arch/sh/kernel/dumpstack.c

File Facts

System
Linux kernel
Corpus path
arch/sh/kernel/dumpstack.c
Extension
.c
Size
3433 bytes
Lines
157
Domain
Architecture Layer
Bucket
arch/sh
Inferred role
Architecture Layer: implementation source
Status
source implementation candidate

Why This File Exists

CPU and platform-specific kernel glue: boot entry, traps, syscall entry, interrupts, page tables, context switch, and low-level barriers.

Dependency Surface

Detected Declarations

Annotated Snippet

if (__get_user(val, (unsigned int __user *)p)) {
					pr_cont("\n");
					return;
				}
				pr_cont("%08x ", val);
			}
		}
		pr_cont("\n");
	}
}

void printk_address(unsigned long address, int reliable)
{
	pr_cont(" [<%px>] %s%pS\n", (void *) address,
		reliable ? "" : "? ", (void *) address);
}

#ifdef CONFIG_FUNCTION_GRAPH_TRACER
static void
print_ftrace_graph_addr(unsigned long addr, void *data,
			const struct stacktrace_ops *ops,
			struct thread_info *tinfo, int *graph)
{
	struct task_struct *task = tinfo->task;
	struct ftrace_ret_stack *ret_stack;
	unsigned long ret_addr;

	if (addr != (unsigned long)return_to_handler)
		return;

	if (!task->ret_stack)
		return;

	ret_stack = ftrace_graph_get_ret_stack(task, *graph);
	if (!ret_stack)
		return;

	ret_addr = ret_stack->ret;

	ops->address(data, ret_addr, 1);

	(*graph)++;
}
#else
static inline void
print_ftrace_graph_addr(unsigned long addr, void *data,
			const struct stacktrace_ops *ops,
			struct thread_info *tinfo, int *graph)
{ }
#endif

void
stack_reader_dump(struct task_struct *task, struct pt_regs *regs,
		  unsigned long *sp, const struct stacktrace_ops *ops,
		  void *data)
{
	struct thread_info *context;
	int graph = 0;

	context = (struct thread_info *)
		((unsigned long)sp & (~(THREAD_SIZE - 1)));

	while (!kstack_end(sp)) {
		unsigned long addr = *sp++;

		if (__kernel_text_address(addr)) {
			ops->address(data, addr, 1);

			print_ftrace_graph_addr(addr, data, ops,
						context, &graph);
		}
	}
}

/*
 * Print one address/symbol entries per line.
 */
static void print_trace_address(void *data, unsigned long addr, int reliable)
{
	printk("%s", (char *)data);
	printk_address(addr, reliable);
}

static const struct stacktrace_ops print_trace_ops = {
	.address = print_trace_address,
};

void show_trace(struct task_struct *tsk, unsigned long *sp,
		struct pt_regs *regs, const char *loglvl)
{

Annotation

Implementation Notes