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// SPDX-License-Identifier: GPL-2.0-or-later
/*
* OpenRISC traps.c
*
* Linux architectural port borrowing liberally from similar works of
* others. All original copyrights apply as per the original source
* declaration.
*
* Modifications for the OpenRISC architecture:
* Copyright (C) 2003 Matjaz Breskvar <phoenix@bsemi.com>
* Copyright (C) 2010-2011 Jonas Bonn <jonas@southpole.se>
*
* Here we handle the break vectors not used by the system call
* mechanism, as well as some general stack/register dumping
* things.
*/
#include <linux/init.h>
#include <linux/sched.h>
#include <linux/sched/debug.h>
#include <linux/sched/task_stack.h>
#include <linux/kernel.h>
#include <linux/extable.h>
#include <linux/kmod.h>
#include <linux/string.h>
#include <linux/errno.h>
#include <linux/ptrace.h>
#include <linux/timer.h>
#include <linux/mm.h>
#include <linux/kallsyms.h>
#include <linux/uaccess.h>
#include <asm/io.h>
#include <asm/pgtable.h>
#include <asm/unwinder.h>
#include <asm/sections.h>
int kstack_depth_to_print = 0x180;
int lwa_flag;
unsigned long __user *lwa_addr;
void print_trace(void *data, unsigned long addr, int reliable)
{
const char *loglvl = data;
printk("%s[<%p>] %s%pS\n", loglvl, (void *) addr, reliable ? "" : "? ",
(void *) addr);
}
/* displays a short stack trace */
void show_stack(struct task_struct *task, unsigned long *esp, const char *loglvl)
{
if (esp == NULL)
esp = (unsigned long *)&esp;
printk("%sCall trace:\n", loglvl);
unwind_stack((void *)loglvl, esp, print_trace);
}
void show_registers(struct pt_regs *regs)
{
int i;
int in_kernel = 1;
unsigned long esp;
esp = (unsigned long)(regs->sp);
if (user_mode(regs))
in_kernel = 0;
printk("CPU #: %d\n"
" PC: %08lx SR: %08lx SP: %08lx\n",
smp_processor_id(), regs->pc, regs->sr, regs->sp);
printk("GPR00: %08lx GPR01: %08lx GPR02: %08lx GPR03: %08lx\n",
0L, regs->gpr[1], regs->gpr[2], regs->gpr[3]);
printk("GPR04: %08lx GPR05: %08lx GPR06: %08lx GPR07: %08lx\n",
regs->gpr[4], regs->gpr[5], regs->gpr[6], regs->gpr[7]);
printk("GPR08: %08lx GPR09: %08lx GPR10: %08lx GPR11: %08lx\n",
regs->gpr[8], regs->gpr[9], regs->gpr[10], regs->gpr[11]);
printk("GPR12: %08lx GPR13: %08lx GPR14: %08lx GPR15: %08lx\n",
regs->gpr[12], regs->gpr[13], regs->gpr[14], regs->gpr[15]);
printk("GPR16: %08lx GPR17: %08lx GPR18: %08lx GPR19: %08lx\n",
regs->gpr[16], regs->gpr[17], regs->gpr[18], regs->gpr[19]);
printk("GPR20: %08lx GPR21: %08lx GPR22: %08lx GPR23: %08lx\n",
regs->gpr[20], regs->gpr[21], regs->gpr[22], regs->gpr[23]);
printk("GPR24: %08lx GPR25: %08lx GPR26: %08lx GPR27: %08lx\n",
regs->gpr[24], regs->gpr[25], regs->gpr[26], regs->gpr[27]);
printk("GPR28: %08lx GPR29: %08lx GPR30: %08lx GPR31: %08lx\n",
regs->gpr[28], regs->gpr[29], regs->gpr[30], regs->gpr[31]);
printk(" RES: %08lx oGPR11: %08lx\n",
regs->gpr[11], regs->orig_gpr11);
printk("Process %s (pid: %d, stackpage=%08lx)\n",
current->comm, current->pid, (unsigned long)current);
/*
* When in-kernel, we also print out the stack and code at the
* time of the fault..
*/
if (in_kernel) {
printk("\nStack: ");
show_stack(NULL, (unsigned long *)esp, KERN_EMERG);
printk("\nCode: ");
if (regs->pc < PAGE_OFFSET)
goto bad;
for (i = -24; i < 24; i++) {
unsigned char c;
if (__get_user(c, &((unsigned char *)regs->pc)[i])) {
bad:
printk(" Bad PC value.");
break;
}
if (i == 0)
printk("(%02x) ", c);
else
printk("%02x ", c);
}
}
printk("\n");
}
void nommu_dump_state(struct pt_regs *regs,
unsigned long ea, unsigned long vector)
{
int i;
unsigned long addr, stack = regs->sp;
printk("\n\r[nommu_dump_state] :: ea %lx, vector %lx\n\r", ea, vector);
printk("CPU #: %d\n"
" PC: %08lx SR: %08lx SP: %08lx\n",
0, regs->pc, regs->sr, regs->sp);
printk("GPR00: %08lx GPR01: %08lx GPR02: %08lx GPR03: %08lx\n",
0L, regs->gpr[1], regs->gpr[2], regs->gpr[3]);
printk("GPR04: %08lx GPR05: %08lx GPR06: %08lx GPR07: %08lx\n",
regs->gpr[4], regs->gpr[5], regs->gpr[6], regs->gpr[7]);
printk("GPR08: %08lx GPR09: %08lx GPR10: %08lx GPR11: %08lx\n",
regs->gpr[8], regs->gpr[9], regs->gpr[10], regs->gpr[11]);
printk("GPR12: %08lx GPR13: %08lx GPR14: %08lx GPR15: %08lx\n",
regs->gpr[12], regs->gpr[13], regs->gpr[14], regs->gpr[15]);
printk("GPR16: %08lx GPR17: %08lx GPR18: %08lx GPR19: %08lx\n",
regs->gpr[16], regs->gpr[17], regs->gpr[18], regs->gpr[19]);
printk("GPR20: %08lx GPR21: %08lx GPR22: %08lx GPR23: %08lx\n",
regs->gpr[20], regs->gpr[21], regs->gpr[22], regs->gpr[23]);
printk("GPR24: %08lx GPR25: %08lx GPR26: %08lx GPR27: %08lx\n",
regs->gpr[24], regs->gpr[25], regs->gpr[26], regs->gpr[27]);
printk("GPR28: %08lx GPR29: %08lx GPR30: %08lx GPR31: %08lx\n",
regs->gpr[28], regs->gpr[29], regs->gpr[30], regs->gpr[31]);
printk(" RES: %08lx oGPR11: %08lx\n",
regs->gpr[11], regs->orig_gpr11);
printk("Process %s (pid: %d, stackpage=%08lx)\n",
((struct task_struct *)(__pa(current)))->comm,
((struct task_struct *)(__pa(current)))->pid,
(unsigned long)current);
printk("\nStack: ");
printk("Stack dump [0x%08lx]:\n", (unsigned long)stack);
for (i = 0; i < kstack_depth_to_print; i++) {
if (((long)stack & (THREAD_SIZE - 1)) == 0)
break;
stack++;
printk("%lx :: sp + %02d: 0x%08lx\n", stack, i * 4,
*((unsigned long *)(__pa(stack))));
}
printk("\n");
printk("Call Trace: ");
i = 1;
while (((long)stack & (THREAD_SIZE - 1)) != 0) {
addr = *((unsigned long *)__pa(stack));
stack++;
if (kernel_text_address(addr)) {
if (i && ((i % 6) == 0))
printk("\n ");
printk(" [<%08lx>]", addr
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