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4945326499
This switches over to use the sh unwinder API which brings it all in line with the general sh routines (which we shuffle around at the same time), and lets us kill off more sh64-specific cruft. Signed-off-by: Paul Mundt <lethal@linux-sh.org>
167 lines
3.5 KiB
C
167 lines
3.5 KiB
C
/*
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* Copyright (C) 1991, 1992 Linus Torvalds
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* Copyright (C) 2000, 2001, 2002 Andi Kleen, SuSE Labs
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* Copyright (C) 2009 Matt Fleming
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* Copyright (C) 2002 - 2012 Paul Mundt
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*
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* This file is subject to the terms and conditions of the GNU General Public
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* License. See the file "COPYING" in the main directory of this archive
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* for more details.
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*/
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#include <linux/kallsyms.h>
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#include <linux/ftrace.h>
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#include <linux/debug_locks.h>
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#include <linux/kdebug.h>
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#include <linux/export.h>
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#include <linux/uaccess.h>
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#include <asm/unwinder.h>
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#include <asm/stacktrace.h>
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void dump_mem(const char *str, unsigned long bottom, unsigned long top)
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{
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unsigned long p;
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int i;
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printk("%s(0x%08lx to 0x%08lx)\n", str, bottom, top);
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for (p = bottom & ~31; p < top; ) {
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printk("%04lx: ", p & 0xffff);
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for (i = 0; i < 8; i++, p += 4) {
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unsigned int val;
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if (p < bottom || p >= top)
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printk(" ");
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else {
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if (__get_user(val, (unsigned int __user *)p)) {
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printk("\n");
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return;
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}
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printk("%08x ", val);
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}
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}
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printk("\n");
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}
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}
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void printk_address(unsigned long address, int reliable)
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{
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printk(" [<%p>] %s%pS\n", (void *) address,
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reliable ? "" : "? ", (void *) address);
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}
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#ifdef CONFIG_FUNCTION_GRAPH_TRACER
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static void
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print_ftrace_graph_addr(unsigned long addr, void *data,
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const struct stacktrace_ops *ops,
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struct thread_info *tinfo, int *graph)
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{
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struct task_struct *task = tinfo->task;
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unsigned long ret_addr;
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int index = task->curr_ret_stack;
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if (addr != (unsigned long)return_to_handler)
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return;
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if (!task->ret_stack || index < *graph)
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return;
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index -= *graph;
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ret_addr = task->ret_stack[index].ret;
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ops->address(data, ret_addr, 1);
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(*graph)++;
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}
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#else
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static inline void
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print_ftrace_graph_addr(unsigned long addr, void *data,
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const struct stacktrace_ops *ops,
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struct thread_info *tinfo, int *graph)
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{ }
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#endif
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void
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stack_reader_dump(struct task_struct *task, struct pt_regs *regs,
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unsigned long *sp, const struct stacktrace_ops *ops,
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void *data)
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{
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struct thread_info *context;
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int graph = 0;
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context = (struct thread_info *)
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((unsigned long)sp & (~(THREAD_SIZE - 1)));
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while (!kstack_end(sp)) {
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unsigned long addr = *sp++;
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if (__kernel_text_address(addr)) {
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ops->address(data, addr, 1);
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print_ftrace_graph_addr(addr, data, ops,
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context, &graph);
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}
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}
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}
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static int print_trace_stack(void *data, char *name)
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{
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printk("%s <%s> ", (char *)data, name);
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return 0;
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}
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/*
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* Print one address/symbol entries per line.
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*/
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static void print_trace_address(void *data, unsigned long addr, int reliable)
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{
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printk(data);
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printk_address(addr, reliable);
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}
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static const struct stacktrace_ops print_trace_ops = {
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.stack = print_trace_stack,
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.address = print_trace_address,
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};
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void show_trace(struct task_struct *tsk, unsigned long *sp,
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struct pt_regs *regs)
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{
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if (regs && user_mode(regs))
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return;
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printk("\nCall trace:\n");
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unwind_stack(tsk, regs, sp, &print_trace_ops, "");
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printk("\n");
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if (!tsk)
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tsk = current;
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debug_show_held_locks(tsk);
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}
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void show_stack(struct task_struct *tsk, unsigned long *sp)
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{
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unsigned long stack;
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if (!tsk)
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tsk = current;
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if (tsk == current)
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sp = (unsigned long *)current_stack_pointer;
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else
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sp = (unsigned long *)tsk->thread.sp;
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stack = (unsigned long)sp;
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dump_mem("Stack: ", stack, THREAD_SIZE +
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(unsigned long)task_stack_page(tsk));
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show_trace(tsk, sp, NULL);
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}
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void dump_stack(void)
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{
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show_stack(NULL, NULL);
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}
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EXPORT_SYMBOL(dump_stack);
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