Release 4.14 arch/cris/kernel/traps.c
// SPDX-License-Identifier: GPL-2.0
/*
* linux/arch/cris/traps.c
*
* Here we handle the break vectors not used by the system call
* mechanism, as well as some general stack/register dumping
* things.
*
* Copyright (C) 2000-2007 Axis Communications AB
*
* Authors: Bjorn Wesen
* Hans-Peter Nilsson
*
*/
#include <linux/init.h>
#include <linux/module.h>
#include <linux/utsname.h>
#include <linux/sched/debug.h>
#ifdef CONFIG_KALLSYMS
#include <linux/kallsyms.h>
#endif
#include <asm/pgtable.h>
#include <linux/uaccess.h>
#include <arch/system.h>
extern void arch_enable_nmi(void);
extern void stop_watchdog(void);
extern void reset_watchdog(void);
extern void show_registers(struct pt_regs *regs);
#ifdef CONFIG_DEBUG_BUGVERBOSE
extern void handle_BUG(struct pt_regs *regs);
#else
#define handle_BUG(regs)
#endif
static int kstack_depth_to_print = 24;
void (*nmi_handler)(struct pt_regs *);
void show_trace(unsigned long *stack)
{
unsigned long addr, module_start, module_end;
extern char _stext[], _etext[];
int i;
pr_err("\nCall Trace: ");
i = 1;
module_start = VMALLOC_START;
module_end = VMALLOC_END;
while (((long)stack & (THREAD_SIZE - 1)) != 0) {
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. */
pr_err("Failing address 0x%lx\n", (unsigned long)stack);
break;
}
stack++;
/*
* If the address is either in the text segment of the
* kernel, or in the region which contains vmalloc'ed
* memory, it *may* be the address of a calling
* routine; if so, print it so that someone tracing
* down the cause of the crash will be able to figure
* out the call path that was taken.
*/
if (((addr >= (unsigned long)_stext) &&
(addr <= (unsigned long)_etext)) ||
((addr >= module_start) && (addr <= module_end))) {
#ifdef CONFIG_KALLSYMS
print_ip_sym(addr);
#else
if (i && ((i % 8) == 0))
pr_err("\n ");
pr_err("[<%08lx>] ", addr);
i++;
#endif
}
}
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Linus Torvalds | 154 | 88.51% | 3 | 50.00% |
| Jesper Nilsson | 18 | 10.34% | 2 | 33.33% |
| Masami Hiramatsu | 2 | 1.15% | 1 | 16.67% |
| Total | 174 | 100.00% | 6 | 100.00% |
/*
* These constants are for searching for possible module text
* segments. MODULE_RANGE is a guess of how much space is likely
* to be vmalloced.
*/
#define MODULE_RANGE (8*1024*1024)
/*
* The output (format, strings and order) is adjusted to be usable with
* ksymoops-2.4.1 with some necessary CRIS-specific patches. Please don't
* change it unless you're serious about adjusting ksymoops and syncing
* with the ksymoops maintainer.
*/
void
show_stack(struct task_struct *task, unsigned long *sp)
{
unsigned long *stack, addr;
int i;
/*
* debugging aid: "show_stack(NULL);" prints a
* back trace.
*/
if (sp == NULL) {
if (task)
sp = (unsigned long*)task->thread.ksp;
else
sp = (unsigned long*)rdsp();
}
stack = sp;
pr_err("\nStack from %08lx:\n ", (unsigned long)stack);
for (i = 0; i < kstack_depth_to_print; i++) {
if (((long)stack & (THREAD_SIZE-1)) == 0)
break;
if (i && ((i % 8) == 0))
pr_err("\n ");
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. */
pr_err("Failing address 0x%lx\n", (unsigned long)stack);
break;
}
stack++;
pr_err("%08lx ", addr);
}
show_trace(sp);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Linus Torvalds | 139 | 82.74% | 1 | 33.33% |
| Mikael Starvik | 25 | 14.88% | 1 | 33.33% |
| Jesper Nilsson | 4 | 2.38% | 1 | 33.33% |
| Total | 168 | 100.00% | 3 | 100.00% |
#if 0
/* displays a short stack trace */
int
show_stack(void)
{
unsigned long *sp = (unsigned long *)rdusp();
int i;
pr_err("Stack dump [0x%08lx]:\n", (unsigned long)sp);
for (i = 0; i < 16; i++)
pr_err("sp + %d: 0x%08lx\n", i*4, sp[i]);
return 0;
}
#endif
void set_nmi_handler(void (*handler)(struct pt_regs *))
{
nmi_handler = handler;
arch_enable_nmi();
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Mikael Starvik | 22 | 95.65% | 1 | 50.00% |
| Jesper Nilsson | 1 | 4.35% | 1 | 50.00% |
| Total | 23 | 100.00% | 2 | 100.00% |
#ifdef CONFIG_DEBUG_NMI_OOPS
void oops_nmi_handler(struct pt_regs *regs)
{
stop_watchdog();
oops_in_progress = 1;
pr_err("NMI!\n");
show_registers(regs);
oops_in_progress = 0;
oops_exit();
pr_err("\n"); /* Flush mtdoops. */
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Mikael Starvik | 21 | 52.50% | 1 | 33.33% |
| Jesper Nilsson | 19 | 47.50% | 2 | 66.67% |
| Total | 40 | 100.00% | 3 | 100.00% |
static int __init oops_nmi_register(void)
{
set_nmi_handler(oops_nmi_handler);
return 0;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Mikael Starvik | 17 | 100.00% | 1 | 100.00% |
| Total | 17 | 100.00% | 1 | 100.00% |
__initcall(oops_nmi_register);
#endif
/*
* This gets called from entry.S when the watchdog has bitten. Show something
* similar to an Oops dump, and if the kernel is configured to be a nice
* doggy, then halt instead of reboot.
*/
void watchdog_bite_hook(struct pt_regs *regs)
{
#ifdef CONFIG_ETRAX_WATCHDOG_NICE_DOGGY
local_irq_disable();
stop_watchdog();
show_registers(regs);
while (1)
; /* Do nothing. */
#else
show_registers(regs);
#endif
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Jesper Nilsson | 29 | 74.36% | 2 | 33.33% |
| Andrew Morton | 4 | 10.26% | 1 | 16.67% |
| Linus Torvalds | 3 | 7.69% | 2 | 33.33% |
| Arnaldo Carvalho de Melo | 3 | 7.69% | 1 | 16.67% |
| Total | 39 | 100.00% | 6 | 100.00% |
/* This is normally the Oops function. */
void die_if_kernel(const char *str, struct pt_regs *regs, long err)
{
if (user_mode(regs))
return;
#ifdef CONFIG_ETRAX_WATCHDOG_NICE_DOGGY
/*
* This printout might take too long and could trigger
* the watchdog normally. If NICE_DOGGY is set, simply
* stop the watchdog during the printout.
*/
stop_watchdog();
#endif
oops_enter();
handle_BUG(regs);
pr_err("Linux %s %s\n", utsname()->release, utsname()->version);
pr_err("%s: %04lx\n", str, err & 0xffff);
show_registers(regs);
oops_exit();
oops_in_progress = 0;
pr_err("\n"); /* Flush mtdoops. */
#ifdef CONFIG_ETRAX_WATCHDOG_NICE_DOGGY
reset_watchdog();
#endif
do_exit(SIGSEGV);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Jesper Nilsson | 89 | 89.00% | 2 | 66.67% |
| Mikael Starvik | 11 | 11.00% | 1 | 33.33% |
| Total | 100 | 100.00% | 3 | 100.00% |
void __init trap_init(void)
{
/* Nothing needs to be done */
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Jesper Nilsson | 8 | 88.89% | 1 | 50.00% |
| Mikael Starvik | 1 | 11.11% | 1 | 50.00% |
| Total | 9 | 100.00% | 2 | 100.00% |
Overall Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Linus Torvalds | 315 | 45.19% | 5 | 27.78% |
| Jesper Nilsson | 249 | 35.72% | 2 | 11.11% |
| Mikael Starvik | 112 | 16.07% | 2 | 11.11% |
| Andrew Morton | 7 | 1.00% | 2 | 11.11% |
| Arnaldo Carvalho de Melo | 3 | 0.43% | 1 | 5.56% |
| David Howells | 3 | 0.43% | 1 | 5.56% |
| Ingo Molnar | 3 | 0.43% | 1 | 5.56% |
| Masami Hiramatsu | 2 | 0.29% | 1 | 5.56% |
| Greg Kroah-Hartman | 1 | 0.14% | 1 | 5.56% |
| Stephen Rothwell | 1 | 0.14% | 1 | 5.56% |
| Lucas De Marchi | 1 | 0.14% | 1 | 5.56% |
| Total | 697 | 100.00% | 18 | 100.00% |
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