mirror of https://gitee.com/openkylin/linux.git
367 lines
9.6 KiB
C
367 lines
9.6 KiB
C
|
/*
|
||
|
|
* 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>
|
||
|
|
*
|
||
|
|
* This program is free software; you can redistribute it and/or
|
||
|
|
* modify it under the terms of the GNU General Public License
|
||
|
|
* as published by the Free Software Foundation; either version
|
||
|
|
* 2 of the License, or (at your option) any later version.
|
||
|
|
*
|
||
|
|
* 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/kernel.h>
|
||
|
|
#include <linux/module.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 <asm/uaccess.h>
|
||
|
|
|
||
|
|
#include <asm/system.h>
|
||
|
|
#include <asm/segment.h>
|
||
|
|
#include <asm/io.h>
|
||
|
|
#include <asm/pgtable.h>
|
||
|
|
|
||
|
|
extern char _etext, _stext;
|
||
|
|
|
||
|
|
int kstack_depth_to_print = 0x180;
|
||
|
|
|
||
|
|
static inline int valid_stack_ptr(struct thread_info *tinfo, void *p)
|
||
|
|
{
|
||
|
|
return p > (void *)tinfo && p < (void *)tinfo + THREAD_SIZE - 3;
|
||
|
|
}
|
||
|
|
|
||
|
|
void show_trace(struct task_struct *task, unsigned long *stack)
|
||
|
|
{
|
||
|
|
struct thread_info *context;
|
||
|
|
unsigned long addr;
|
||
|
|
|
||
|
|
context = (struct thread_info *)
|
||
|
|
((unsigned long)stack & (~(THREAD_SIZE - 1)));
|
||
|
|
|
||
|
|
while (valid_stack_ptr(context, stack)) {
|
||
|
|
addr = *stack++;
|
||
|
|
if (__kernel_text_address(addr)) {
|
||
|
|
printk(" [<%08lx>]", addr);
|
||
|
|
print_symbol(" %s", addr);
|
||
|
|
printk("\n");
|
||
|
|
}
|
||
|
|
}
|
||
|
|
printk(" =======================\n");
|
||
|
|
}
|
||
|
|
|
||
|
|
/* displays a short stack trace */
|
||
|
|
void show_stack(struct task_struct *task, unsigned long *esp)
|
||
|
|
{
|
||
|
|
unsigned long addr, *stack;
|
||
|
|
int i;
|
||
|
|
|
||
|
|
if (esp == NULL)
|
||
|
|
esp = (unsigned long *)&esp;
|
||
|
|
|
||
|
|
stack = esp;
|
||
|
|
|
||
|
|
printk("Stack dump [0x%08lx]:\n", (unsigned long)esp);
|
||
|
|
for (i = 0; i < kstack_depth_to_print; i++) {
|
||
|
|
if (kstack_end(stack))
|
||
|
|
break;
|
||
|
|
if (__get_user(addr, stack)) {
|
||
|
|
/* This message matches "failing address" marked
|
||
|
|
s390 in ksymoops, so lines containing it will
|
||
|
|
not be filtered out by ksymoops. */
|
||
|
|
printk("Failing address 0x%lx\n", (unsigned long)stack);
|
||
|
|
break;
|
||
|
|
}
|
||
|
|
stack++;
|
||
|
|
|
||
|
|
printk("sp + %02d: 0x%08lx\n", i * 4, addr);
|
||
|
|
}
|
||
|
|
printk("\n");
|
||
|
|
|
||
|
|
show_trace(task, esp);
|
||
|
|
|
||
|
|
return;
|
||
|
|
}
|
||
|
|
|
||
|
|
void show_trace_task(struct task_struct *tsk)
|
||
|
|
{
|
||
|
|
/*
|
||
|
|
* TODO: SysRq-T trace dump...
|
||
|
|
*/
|
||
|
|
}
|
||
|
|
|
||
|
|
/*
|
||
|
|
* The architecture-independent backtrace generator
|
||
|
|
*/
|
||
|
|
void dump_stack(void)
|
||
|
|
{
|
||
|
|
unsigned long stack;
|
||
|
|
|
||
|
|
show_stack(current, &stack);
|
||
|
|
}
|
||
|
|
|
||
|
|
void show_registers(struct pt_regs *regs)
|
||
|
|
{
|
||
|
|
int i;
|
||
|
|
int in_kernel = 1;
|
||
|
|
unsigned long esp;
|
||
|
|
|
||
|
|
esp = (unsigned long)(®s->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 syscallno: %08lx\n",
|
||
|
|
regs->gpr[11], regs->orig_gpr11, regs->syscallno);
|
||
|
|
|
||
|
|
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);
|
||
|
|
|
||
|
|
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 syscallno: %08lx\n",
|
||
|
|
regs->gpr[11], regs->orig_gpr11, regs->syscallno);
|
||
|
|
|
||
|
|
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);
|
||
|
|
i++;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
printk("\n");
|
||
|
|
|
||
|
|
printk("\nCode: ");
|
||
|
|
|
||
|
|
for (i = -24; i < 24; i++) {
|
||
|
|
unsigned char c;
|
||
|
|
c = ((unsigned char *)(__pa(regs->pc)))[i];
|
||
|
|
|
||
|
|
if (i == 0)
|
||
|
|
printk("(%02x) ", c);
|
||
|
|
else
|
||
|
|
printk("%02x ", c);
|
||
|
|
}
|
||
|
|
printk("\n");
|
||
|
|
}
|
||
|
|
|
||
|
|
/* This is normally the 'Oops' routine */
|
||
|
|
void die(const char *str, struct pt_regs *regs, long err)
|
||
|
|
{
|
||
|
|
|
||
|
|
console_verbose();
|
||
|
|
printk("\n%s#: %04lx\n", str, err & 0xffff);
|
||
|
|
show_registers(regs);
|
||
|
|
#ifdef CONFIG_JUMP_UPON_UNHANDLED_EXCEPTION
|
||
|
|
printk("\n\nUNHANDLED_EXCEPTION: entering infinite loop\n");
|
||
|
|
|
||
|
|
/* shut down interrupts */
|
||
|
|
local_irq_disable();
|
||
|
|
|
||
|
|
__asm__ __volatile__("l.nop 1");
|
||
|
|
do {} while (1);
|
||
|
|
#endif
|
||
|
|
do_exit(SIGSEGV);
|
||
|
|
}
|
||
|
|
|
||
|
|
/* This is normally the 'Oops' routine */
|
||
|
|
void die_if_kernel(const char *str, struct pt_regs *regs, long err)
|
||
|
|
{
|
||
|
|
if (user_mode(regs))
|
||
|
|
return;
|
||
|
|
|
||
|
|
die(str, regs, err);
|
||
|
|
}
|
||
|
|
|
||
|
|
void unhandled_exception(struct pt_regs *regs, int ea, int vector)
|
||
|
|
{
|
||
|
|
printk("Unable to handle exception at EA =0x%x, vector 0x%x",
|
||
|
|
ea, vector);
|
||
|
|
die("Oops", regs, 9);
|
||
|
|
}
|
||
|
|
|
||
|
|
void __init trap_init(void)
|
||
|
|
{
|
||
|
|
/* Nothing needs to be done */
|
||
|
|
}
|
||
|
|
|
||
|
|
asmlinkage void do_trap(struct pt_regs *regs, unsigned long address)
|
||
|
|
{
|
||
|
|
siginfo_t info;
|
||
|
|
memset(&info, 0, sizeof(info));
|
||
|
|
info.si_signo = SIGTRAP;
|
||
|
|
info.si_code = TRAP_TRACE;
|
||
|
|
info.si_addr = (void *)address;
|
||
|
|
force_sig_info(SIGTRAP, &info, current);
|
||
|
|
|
||
|
|
regs->pc += 4;
|
||
|
|
}
|
||
|
|
|
||
|
|
asmlinkage void do_unaligned_access(struct pt_regs *regs, unsigned long address)
|
||
|
|
{
|
||
|
|
siginfo_t info;
|
||
|
|
|
||
|
|
if (user_mode(regs)) {
|
||
|
|
/* Send a SIGSEGV */
|
||
|
|
info.si_signo = SIGSEGV;
|
||
|
|
info.si_errno = 0;
|
||
|
|
/* info.si_code has been set above */
|
||
|
|
info.si_addr = (void *)address;
|
||
|
|
force_sig_info(SIGSEGV, &info, current);
|
||
|
|
} else {
|
||
|
|
printk("KERNEL: Unaligned Access 0x%.8lx\n", address);
|
||
|
|
show_registers(regs);
|
||
|
|
die("Die:", regs, address);
|
||
|
|
}
|
||
|
|
|
||
|
|
}
|
||
|
|
|
||
|
|
asmlinkage void do_bus_fault(struct pt_regs *regs, unsigned long address)
|
||
|
|
{
|
||
|
|
siginfo_t info;
|
||
|
|
|
||
|
|
if (user_mode(regs)) {
|
||
|
|
/* Send a SIGBUS */
|
||
|
|
info.si_signo = SIGBUS;
|
||
|
|
info.si_errno = 0;
|
||
|
|
info.si_code = BUS_ADRERR;
|
||
|
|
info.si_addr = (void *)address;
|
||
|
|
force_sig_info(SIGBUS, &info, current);
|
||
|
|
} else { /* Kernel mode */
|
||
|
|
printk("KERNEL: Bus error (SIGBUS) 0x%.8lx\n", address);
|
||
|
|
show_registers(regs);
|
||
|
|
die("Die:", regs, address);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
asmlinkage void do_illegal_instruction(struct pt_regs *regs,
|
||
|
|
unsigned long address)
|
||
|
|
{
|
||
|
|
siginfo_t info;
|
||
|
|
|
||
|
|
if (user_mode(regs)) {
|
||
|
|
/* Send a SIGILL */
|
||
|
|
info.si_signo = SIGILL;
|
||
|
|
info.si_errno = 0;
|
||
|
|
info.si_code = ILL_ILLOPC;
|
||
|
|
info.si_addr = (void *)address;
|
||
|
|
force_sig_info(SIGBUS, &info, current);
|
||
|
|
} else { /* Kernel mode */
|
||
|
|
printk("KERNEL: Illegal instruction (SIGILL) 0x%.8lx\n",
|
||
|
|
address);
|
||
|
|
show_registers(regs);
|
||
|
|
die("Die:", regs, address);
|
||
|
|
}
|
||
|
|
}
|