mirror of
https://github.com/torvalds/linux.git
synced 2025-11-04 10:40:15 +02:00
c0735ae9a0
The SH implementation never called stacktrace_ops.stack(). Presumably this was copied from the x86 implementation. Hence remove the method, and all implementations (most of them are dummies). Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be> Signed-off-by: Rich Felker <dalias@libc.org>
156 lines
3.4 KiB
C
156 lines
3.4 KiB
C
// SPDX-License-Identifier: GPL-2.0
|
|
/*
|
|
* Copyright (C) 1991, 1992 Linus Torvalds
|
|
* Copyright (C) 2000, 2001, 2002 Andi Kleen, SuSE Labs
|
|
* Copyright (C) 2009 Matt Fleming
|
|
* Copyright (C) 2002 - 2012 Paul Mundt
|
|
*/
|
|
#include <linux/kallsyms.h>
|
|
#include <linux/ftrace.h>
|
|
#include <linux/debug_locks.h>
|
|
#include <linux/sched/debug.h>
|
|
#include <linux/sched/task_stack.h>
|
|
#include <linux/kdebug.h>
|
|
#include <linux/export.h>
|
|
#include <linux/uaccess.h>
|
|
#include <asm/unwinder.h>
|
|
#include <asm/stacktrace.h>
|
|
|
|
void dump_mem(const char *str, const char *loglvl, unsigned long bottom,
|
|
unsigned long top)
|
|
{
|
|
unsigned long p;
|
|
int i;
|
|
|
|
printk("%s%s(0x%08lx to 0x%08lx)\n", loglvl, str, bottom, top);
|
|
|
|
for (p = bottom & ~31; p < top; ) {
|
|
printk("%s%04lx: ", loglvl, p & 0xffff);
|
|
|
|
for (i = 0; i < 8; i++, p += 4) {
|
|
unsigned int val;
|
|
|
|
if (p < bottom || p >= top)
|
|
pr_cont(" ");
|
|
else {
|
|
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)
|
|
{
|
|
if (regs && user_mode(regs))
|
|
return;
|
|
|
|
printk("%s\nCall trace:\n", loglvl);
|
|
|
|
unwind_stack(tsk, regs, sp, &print_trace_ops, (void *)loglvl);
|
|
|
|
pr_cont("\n");
|
|
|
|
if (!tsk)
|
|
tsk = current;
|
|
|
|
debug_show_held_locks(tsk);
|
|
}
|
|
|
|
void show_stack(struct task_struct *tsk, unsigned long *sp, const char *loglvl)
|
|
{
|
|
unsigned long stack;
|
|
|
|
if (!tsk)
|
|
tsk = current;
|
|
if (tsk == current)
|
|
sp = (unsigned long *)current_stack_pointer;
|
|
else
|
|
sp = (unsigned long *)tsk->thread.sp;
|
|
|
|
stack = (unsigned long)sp;
|
|
dump_mem("Stack: ", loglvl, stack, THREAD_SIZE +
|
|
(unsigned long)task_stack_page(tsk));
|
|
show_trace(tsk, sp, NULL, loglvl);
|
|
}
|