d39e17c7f8
Both warning and warning_symbol are nowhere used. Let's get rid of them. Signed-off-by: Richard Weinberger <richard@nod.at> Signed-off-by: Paul Mundt <lethal@linux-sh.org>
108 lines
2.2 KiB
C
108 lines
2.2 KiB
C
/*
|
|
* Copyright (C) 1991, 1992 Linus Torvalds
|
|
* Copyright (C) 2000, 2001, 2002 Andi Kleen, SuSE Labs
|
|
* Copyright (C) 2009 Matt Fleming
|
|
*/
|
|
#include <linux/kallsyms.h>
|
|
#include <linux/ftrace.h>
|
|
#include <linux/debug_locks.h>
|
|
#include <asm/unwinder.h>
|
|
#include <asm/stacktrace.h>
|
|
|
|
void printk_address(unsigned long address, int reliable)
|
|
{
|
|
printk(" [<%p>] %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;
|
|
unsigned long ret_addr;
|
|
int index = task->curr_ret_stack;
|
|
|
|
if (addr != (unsigned long)return_to_handler)
|
|
return;
|
|
|
|
if (!task->ret_stack || index < *graph)
|
|
return;
|
|
|
|
index -= *graph;
|
|
ret_addr = task->ret_stack[index].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);
|
|
}
|
|
}
|
|
}
|
|
|
|
static int print_trace_stack(void *data, char *name)
|
|
{
|
|
printk("%s <%s> ", (char *)data, name);
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* Print one address/symbol entries per line.
|
|
*/
|
|
static void print_trace_address(void *data, unsigned long addr, int reliable)
|
|
{
|
|
printk(data);
|
|
printk_address(addr, reliable);
|
|
}
|
|
|
|
static const struct stacktrace_ops print_trace_ops = {
|
|
.stack = print_trace_stack,
|
|
.address = print_trace_address,
|
|
};
|
|
|
|
void show_trace(struct task_struct *tsk, unsigned long *sp,
|
|
struct pt_regs *regs)
|
|
{
|
|
if (regs && user_mode(regs))
|
|
return;
|
|
|
|
printk("\nCall trace:\n");
|
|
|
|
unwind_stack(tsk, regs, sp, &print_trace_ops, "");
|
|
|
|
printk("\n");
|
|
|
|
if (!tsk)
|
|
tsk = current;
|
|
|
|
debug_show_held_locks(tsk);
|
|
}
|