// SPDX-License-Identifier: GPL-2.0-only
/*
 * Copyright (C) 2001 - 2007 Jeff Dike (jdike@{addtoit,linux.intel}.com)
 * Copyright (C) 2013 Richard Weinberger <richrd@nod.at>
 */

#include <linux/kallsyms.h>
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/sched.h>
#include <linux/sched/debug.h>
#include <linux/sched/task_stack.h>

#include <asm/stacktrace.h>
#include <os.h>

static void _print_addr(void *data, unsigned long address, int reliable)
{
        const char *loglvl = data;

        printk("%s [<%08lx>] %s%pS\n", loglvl, address, reliable ? "" : "? ",
                (void *)address);
}

static const struct stacktrace_ops stackops = {
        .address = _print_addr
};

void show_stack(struct task_struct *task, unsigned long *stack,
                       const char *loglvl)
{
        struct pt_regs *segv_regs = current->thread.segv_regs;
        int i;

        if (!stack)
                stack = get_stack_pointer(task, segv_regs);

        printk("%sStack:\n", loglvl);
        for (i = 0; i < 3 * STACKSLOTS_PER_LINE; i++) {
                if (kstack_end(stack))
                        break;
                if (i && ((i % STACKSLOTS_PER_LINE) == 0))
                        pr_cont("\n");
                pr_cont(" %08lx", READ_ONCE_NOCHECK(*stack));
                stack++;
        }

        printk("%sCall Trace:\n", loglvl);
        dump_trace(task ?: current, &stackops, (void *)loglvl);
}