x86: unify appropriate bits from dumpstack_32 and dumpstack_64
Impact: cleanup As promised, now that dumpstack_32 and dumpstack_64 have so many bits in common, we should merge the in-sync bits into a common file, to prevent them from diverging again. This patch removes bits which are common between dumpstack_32.c and dumpstack_64.c and places them in a common dumpstack.c which is built for both 32 and 64 bit arches. Signed-off-by: Neil Horman <nhorman@tuxdriver.com> Acked-by: Alexander van Heukelum <heukelum@fastmail.fm> Signed-off-by: Ingo Molnar <mingo@elte.hu> Makefile | 2 arch/x86/kernel/Makefile | 2 arch/x86/kernel/Makefile | 2 arch/x86/kernel/Makefile | 2 arch/x86/kernel/Makefile | 2 arch/x86/kernel/Makefile | 2 arch/x86/kernel/dumpstack.c | 319 +++++++++++++++++++++++++++++++++++++++++ arch/x86/kernel/dumpstack.h | 39 +++++ arch/x86/kernel/dumpstack_32.c | 294 ------------------------------------- arch/x86/kernel/dumpstack_64.c | 285 ------------------------------------ 5 files changed, 363 insertions(+), 576 deletions(-)
This commit is contained in:
Neil Horman
Ingo Molnar
Родитель
871d3779cb
Коммит
878719e831
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@ -24,7 +24,7 @@ CFLAGS_tsc.o := $(nostackp)
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obj-y := process_$(BITS).o signal_$(BITS).o entry_$(BITS).o
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obj-y := process_$(BITS).o signal_$(BITS).o entry_$(BITS).o
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obj-y += traps.o irq.o irq_$(BITS).o dumpstack_$(BITS).o
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obj-y += traps.o irq.o irq_$(BITS).o dumpstack_$(BITS).o
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obj-y += time_$(BITS).o ioport.o ldt.o
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obj-y += time_$(BITS).o ioport.o ldt.o dumpstack.o
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obj-y += setup.o i8259.o irqinit_$(BITS).o setup_percpu.o
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obj-y += setup.o i8259.o irqinit_$(BITS).o setup_percpu.o
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obj-$(CONFIG_X86_VISWS) += visws_quirks.o
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obj-$(CONFIG_X86_VISWS) += visws_quirks.o
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obj-$(CONFIG_X86_32) += probe_roms_32.o
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obj-$(CONFIG_X86_32) += probe_roms_32.o
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@ -0,0 +1,319 @@
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/*
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* Copyright (C) 1991, 1992 Linus Torvalds
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* Copyright (C) 2000, 2001, 2002 Andi Kleen, SuSE Labs
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*/
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#include <linux/kallsyms.h>
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#include <linux/kprobes.h>
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#include <linux/uaccess.h>
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#include <linux/utsname.h>
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#include <linux/hardirq.h>
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#include <linux/kdebug.h>
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#include <linux/module.h>
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#include <linux/ptrace.h>
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#include <linux/kexec.h>
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#include <linux/bug.h>
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#include <linux/nmi.h>
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#include <linux/sysfs.h>
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#include <asm/stacktrace.h>
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#include "dumpstack.h"
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int panic_on_unrecovered_nmi;
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unsigned int code_bytes = 64;
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int kstack_depth_to_print = 3 * STACKSLOTS_PER_LINE;
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static int die_counter;
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void printk_address(unsigned long address, int reliable)
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{
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printk(" [<%p>] %s%pS\n", (void *) address,
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reliable ? "" : "? ", (void *) address);
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}
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/*
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* x86-64 can have up to three kernel stacks:
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* process stack
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* interrupt stack
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* severe exception (double fault, nmi, stack fault, debug, mce) hardware stack
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*/
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static inline int valid_stack_ptr(struct thread_info *tinfo,
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void *p, unsigned int size, void *end)
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{
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void *t = tinfo;
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if (end) {
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if (p < end && p >= (end-THREAD_SIZE))
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return 1;
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else
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return 0;
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}
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return p > t && p < t + THREAD_SIZE - size;
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}
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unsigned long
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print_context_stack(struct thread_info *tinfo,
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unsigned long *stack, unsigned long bp,
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const struct stacktrace_ops *ops, void *data,
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unsigned long *end)
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{
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struct stack_frame *frame = (struct stack_frame *)bp;
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while (valid_stack_ptr(tinfo, stack, sizeof(*stack), end)) {
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unsigned long addr;
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addr = *stack;
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if (__kernel_text_address(addr)) {
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if ((unsigned long) stack == bp + sizeof(long)) {
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ops->address(data, addr, 1);
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frame = frame->next_frame;
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bp = (unsigned long) frame;
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} else {
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ops->address(data, addr, bp == 0);
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}
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}
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stack++;
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}
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return bp;
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}
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static void
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print_trace_warning_symbol(void *data, char *msg, unsigned long symbol)
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{
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printk(data);
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print_symbol(msg, symbol);
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printk("\n");
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}
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static void print_trace_warning(void *data, char *msg)
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{
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printk("%s%s\n", (char *)data, msg);
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}
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static int print_trace_stack(void *data, char *name)
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{
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printk("%s <%s> ", (char *)data, name);
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return 0;
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}
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/*
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* Print one address/symbol entries per line.
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*/
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static void print_trace_address(void *data, unsigned long addr, int reliable)
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{
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touch_nmi_watchdog();
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printk(data);
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printk_address(addr, reliable);
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}
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static const struct stacktrace_ops print_trace_ops = {
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.warning = print_trace_warning,
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.warning_symbol = print_trace_warning_symbol,
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.stack = print_trace_stack,
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.address = print_trace_address,
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};
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void
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show_trace_log_lvl(struct task_struct *task, struct pt_regs *regs,
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unsigned long *stack, unsigned long bp, char *log_lvl)
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{
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printk("%sCall Trace:\n", log_lvl);
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dump_trace(task, regs, stack, bp, &print_trace_ops, log_lvl);
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}
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void show_trace(struct task_struct *task, struct pt_regs *regs,
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unsigned long *stack, unsigned long bp)
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{
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show_trace_log_lvl(task, regs, stack, bp, "");
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}
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void show_stack(struct task_struct *task, unsigned long *sp)
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{
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show_stack_log_lvl(task, NULL, sp, 0, "");
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}
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/*
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* The architecture-independent dump_stack generator
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*/
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void dump_stack(void)
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{
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unsigned long bp = 0;
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unsigned long stack;
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#ifdef CONFIG_FRAME_POINTER
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if (!bp)
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get_bp(bp);
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#endif
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printk("Pid: %d, comm: %.20s %s %s %.*s\n",
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current->pid, current->comm, print_tainted(),
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init_utsname()->release,
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(int)strcspn(init_utsname()->version, " "),
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init_utsname()->version);
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show_trace(NULL, NULL, &stack, bp);
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}
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EXPORT_SYMBOL(dump_stack);
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static raw_spinlock_t die_lock = __RAW_SPIN_LOCK_UNLOCKED;
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static int die_owner = -1;
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static unsigned int die_nest_count;
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unsigned __kprobes long oops_begin(void)
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{
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int cpu;
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unsigned long flags;
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oops_enter();
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/* racy, but better than risking deadlock. */
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raw_local_irq_save(flags);
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cpu = smp_processor_id();
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if (!__raw_spin_trylock(&die_lock)) {
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if (cpu == die_owner)
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/* nested oops. should stop eventually */;
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else
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__raw_spin_lock(&die_lock);
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}
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die_nest_count++;
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die_owner = cpu;
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console_verbose();
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bust_spinlocks(1);
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return flags;
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}
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void __kprobes oops_end(unsigned long flags, struct pt_regs *regs, int signr)
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{
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if (regs && kexec_should_crash(current))
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crash_kexec(regs);
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bust_spinlocks(0);
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die_owner = -1;
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add_taint(TAINT_DIE);
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die_nest_count--;
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if (!die_nest_count)
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/* Nest count reaches zero, release the lock. */
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__raw_spin_unlock(&die_lock);
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raw_local_irq_restore(flags);
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oops_exit();
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if (!signr)
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return;
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if (in_interrupt())
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panic("Fatal exception in interrupt");
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if (panic_on_oops)
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panic("Fatal exception");
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do_exit(signr);
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}
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int __kprobes __die(const char *str, struct pt_regs *regs, long err)
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{
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#ifdef CONFIG_X86_32
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unsigned short ss;
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unsigned long sp;
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#endif
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printk(KERN_EMERG "%s: %04lx [#%d] ", str, err & 0xffff, ++die_counter);
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#ifdef CONFIG_PREEMPT
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printk("PREEMPT ");
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#endif
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#ifdef CONFIG_SMP
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printk("SMP ");
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#endif
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#ifdef CONFIG_DEBUG_PAGEALLOC
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printk("DEBUG_PAGEALLOC");
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#endif
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printk("\n");
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sysfs_printk_last_file();
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if (notify_die(DIE_OOPS, str, regs, err,
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current->thread.trap_no, SIGSEGV) == NOTIFY_STOP)
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return 1;
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show_registers(regs);
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#ifdef CONFIG_X86_32
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sp = (unsigned long) (®s->sp);
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savesegment(ss, ss);
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if (user_mode(regs)) {
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sp = regs->sp;
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ss = regs->ss & 0xffff;
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}
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printk(KERN_EMERG "EIP: [<%08lx>] ", regs->ip);
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print_symbol("%s", regs->ip);
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printk(" SS:ESP %04x:%08lx\n", ss, sp);
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#else
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/* Executive summary in case the oops scrolled away */
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printk(KERN_ALERT "RIP ");
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printk_address(regs->ip, 1);
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printk(" RSP <%016lx>\n", regs->sp);
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#endif
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return 0;
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}
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/*
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* This is gone through when something in the kernel has done something bad
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* and is about to be terminated:
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*/
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void die(const char *str, struct pt_regs *regs, long err)
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{
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unsigned long flags = oops_begin();
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int sig = SIGSEGV;
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if (!user_mode_vm(regs))
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report_bug(regs->ip, regs);
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if (__die(str, regs, err))
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sig = 0;
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oops_end(flags, regs, sig);
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}
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void notrace __kprobes
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die_nmi(char *str, struct pt_regs *regs, int do_panic)
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{
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unsigned long flags;
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if (notify_die(DIE_NMIWATCHDOG, str, regs, 0, 2, SIGINT) == NOTIFY_STOP)
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return;
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/*
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* We are in trouble anyway, lets at least try
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* to get a message out.
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*/
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flags = oops_begin();
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printk(KERN_EMERG "%s", str);
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printk(" on CPU%d, ip %08lx, registers:\n",
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smp_processor_id(), regs->ip);
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show_registers(regs);
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oops_end(flags, regs, 0);
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if (do_panic || panic_on_oops)
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panic("Non maskable interrupt");
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nmi_exit();
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local_irq_enable();
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do_exit(SIGBUS);
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}
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static int __init oops_setup(char *s)
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{
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if (!s)
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return -EINVAL;
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if (!strcmp(s, "panic"))
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panic_on_oops = 1;
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return 0;
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}
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early_param("oops", oops_setup);
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static int __init kstack_setup(char *s)
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{
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if (!s)
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return -EINVAL;
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kstack_depth_to_print = simple_strtoul(s, NULL, 0);
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return 0;
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}
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early_param("kstack", kstack_setup);
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|
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static int __init code_bytes_setup(char *s)
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{
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code_bytes = simple_strtoul(s, NULL, 0);
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|
if (code_bytes > 8192)
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code_bytes = 8192;
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|
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return 1;
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|
}
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__setup("code_bytes=", code_bytes_setup);
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|
|
@ -0,0 +1,39 @@
|
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|
/*
|
||||||
|
* Copyright (C) 1991, 1992 Linus Torvalds
|
||||||
|
* Copyright (C) 2000, 2001, 2002 Andi Kleen, SuSE Labs
|
||||||
|
*/
|
||||||
|
|
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#ifndef DUMPSTACK_H
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|
#define DUMPSTACK_H
|
||||||
|
|
||||||
|
#ifdef CONFIG_X86_32
|
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|
#define STACKSLOTS_PER_LINE 8
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|
#define get_bp(bp) asm("movl %%ebp, %0" : "=r" (bp) :)
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|
#else
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#define STACKSLOTS_PER_LINE 4
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|
#define get_bp(bp) asm("movq %%rbp, %0" : "=r" (bp) :)
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||||||
|
#endif
|
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|
|
||||||
|
extern unsigned long
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||||||
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print_context_stack(struct thread_info *tinfo,
|
||||||
|
unsigned long *stack, unsigned long bp,
|
||||||
|
const struct stacktrace_ops *ops, void *data,
|
||||||
|
unsigned long *end);
|
||||||
|
|
||||||
|
extern void
|
||||||
|
show_trace_log_lvl(struct task_struct *task, struct pt_regs *regs,
|
||||||
|
unsigned long *stack, unsigned long bp, char *log_lvl);
|
||||||
|
|
||||||
|
extern void
|
||||||
|
show_stack_log_lvl(struct task_struct *task, struct pt_regs *regs,
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||||||
|
unsigned long *sp, unsigned long bp, char *log_lvl);
|
||||||
|
|
||||||
|
extern unsigned int code_bytes;
|
||||||
|
extern int kstack_depth_to_print;
|
||||||
|
|
||||||
|
/* The form of the top of the frame on the stack */
|
||||||
|
struct stack_frame {
|
||||||
|
struct stack_frame *next_frame;
|
||||||
|
unsigned long return_address;
|
||||||
|
};
|
||||||
|
#endif
|
||||||
|
|
@ -17,64 +17,7 @@
|
||||||
|
|
||||||
#include <asm/stacktrace.h>
|
#include <asm/stacktrace.h>
|
||||||
|
|
||||||
#define STACKSLOTS_PER_LINE 8
|
#include "dumpstack.h"
|
||||||
#define get_bp(bp) asm("movl %%ebp, %0" : "=r" (bp) :)
|
|
||||||
|
|
||||||
int panic_on_unrecovered_nmi;
|
|
||||||
int kstack_depth_to_print = 3 * STACKSLOTS_PER_LINE;
|
|
||||||
static unsigned int code_bytes = 64;
|
|
||||||
static int die_counter;
|
|
||||||
|
|
||||||
void printk_address(unsigned long address, int reliable)
|
|
||||||
{
|
|
||||||
printk(" [<%p>] %s%pS\n", (void *) address,
|
|
||||||
reliable ? "" : "? ", (void *) address);
|
|
||||||
}
|
|
||||||
|
|
||||||
static inline int valid_stack_ptr(struct thread_info *tinfo,
|
|
||||||
void *p, unsigned int size, void *end)
|
|
||||||
{
|
|
||||||
void *t = tinfo;
|
|
||||||
if (end) {
|
|
||||||
if (p < end && p >= (end-THREAD_SIZE))
|
|
||||||
return 1;
|
|
||||||
else
|
|
||||||
return 0;
|
|
||||||
}
|
|
||||||
return p > t && p < t + THREAD_SIZE - size;
|
|
||||||
}
|
|
||||||
|
|
||||||
/* The form of the top of the frame on the stack */
|
|
||||||
struct stack_frame {
|
|
||||||
struct stack_frame *next_frame;
|
|
||||||
unsigned long return_address;
|
|
||||||
};
|
|
||||||
|
|
||||||
static inline unsigned long
|
|
||||||
print_context_stack(struct thread_info *tinfo,
|
|
||||||
unsigned long *stack, unsigned long bp,
|
|
||||||
const struct stacktrace_ops *ops, void *data,
|
|
||||||
unsigned long *end)
|
|
||||||
{
|
|
||||||
struct stack_frame *frame = (struct stack_frame *)bp;
|
|
||||||
|
|
||||||
while (valid_stack_ptr(tinfo, stack, sizeof(*stack), end)) {
|
|
||||||
unsigned long addr;
|
|
||||||
|
|
||||||
addr = *stack;
|
|
||||||
if (__kernel_text_address(addr)) {
|
|
||||||
if ((unsigned long) stack == bp + sizeof(long)) {
|
|
||||||
ops->address(data, addr, 1);
|
|
||||||
frame = frame->next_frame;
|
|
||||||
bp = (unsigned long) frame;
|
|
||||||
} else {
|
|
||||||
ops->address(data, addr, bp == 0);
|
|
||||||
}
|
|
||||||
}
|
|
||||||
stack++;
|
|
||||||
}
|
|
||||||
return bp;
|
|
||||||
}
|
|
||||||
|
|
||||||
void dump_trace(struct task_struct *task, struct pt_regs *regs,
|
void dump_trace(struct task_struct *task, struct pt_regs *regs,
|
||||||
unsigned long *stack, unsigned long bp,
|
unsigned long *stack, unsigned long bp,
|
||||||
|
|
@ -119,57 +62,7 @@ void dump_trace(struct task_struct *task, struct pt_regs *regs,
|
||||||
}
|
}
|
||||||
EXPORT_SYMBOL(dump_trace);
|
EXPORT_SYMBOL(dump_trace);
|
||||||
|
|
||||||
static void
|
void
|
||||||
print_trace_warning_symbol(void *data, char *msg, unsigned long symbol)
|
|
||||||
{
|
|
||||||
printk(data);
|
|
||||||
print_symbol(msg, symbol);
|
|
||||||
printk("\n");
|
|
||||||
}
|
|
||||||
|
|
||||||
static void print_trace_warning(void *data, char *msg)
|
|
||||||
{
|
|
||||||
printk("%s%s\n", (char *)data, msg);
|
|
||||||
}
|
|
||||||
|
|
||||||
static int print_trace_stack(void *data, char *name)
|
|
||||||
{
|
|
||||||
printk("%s <%s> ", (char *)data, name);
|
|
||||||
return 0;
|
|
||||||
}
|
|
||||||
|
|
||||||
/*
|
|
||||||
* Print one address/symbol entries per line.
|
|
||||||
*/
|
|
||||||
static void print_trace_address(void *data, unsigned long addr, int reliable)
|
|
||||||
{
|
|
||||||
touch_nmi_watchdog();
|
|
||||||
printk(data);
|
|
||||||
printk_address(addr, reliable);
|
|
||||||
}
|
|
||||||
|
|
||||||
static const struct stacktrace_ops print_trace_ops = {
|
|
||||||
.warning = print_trace_warning,
|
|
||||||
.warning_symbol = print_trace_warning_symbol,
|
|
||||||
.stack = print_trace_stack,
|
|
||||||
.address = print_trace_address,
|
|
||||||
};
|
|
||||||
|
|
||||||
static void
|
|
||||||
show_trace_log_lvl(struct task_struct *task, struct pt_regs *regs,
|
|
||||||
unsigned long *stack, unsigned long bp, char *log_lvl)
|
|
||||||
{
|
|
||||||
printk("%sCall Trace:\n", log_lvl);
|
|
||||||
dump_trace(task, regs, stack, bp, &print_trace_ops, log_lvl);
|
|
||||||
}
|
|
||||||
|
|
||||||
void show_trace(struct task_struct *task, struct pt_regs *regs,
|
|
||||||
unsigned long *stack, unsigned long bp)
|
|
||||||
{
|
|
||||||
show_trace_log_lvl(task, regs, stack, bp, "");
|
|
||||||
}
|
|
||||||
|
|
||||||
static void
|
|
||||||
show_stack_log_lvl(struct task_struct *task, struct pt_regs *regs,
|
show_stack_log_lvl(struct task_struct *task, struct pt_regs *regs,
|
||||||
unsigned long *sp, unsigned long bp, char *log_lvl)
|
unsigned long *sp, unsigned long bp, char *log_lvl)
|
||||||
{
|
{
|
||||||
|
|
@ -196,33 +89,6 @@ show_stack_log_lvl(struct task_struct *task, struct pt_regs *regs,
|
||||||
show_trace_log_lvl(task, regs, sp, bp, log_lvl);
|
show_trace_log_lvl(task, regs, sp, bp, log_lvl);
|
||||||
}
|
}
|
||||||
|
|
||||||
void show_stack(struct task_struct *task, unsigned long *sp)
|
|
||||||
{
|
|
||||||
show_stack_log_lvl(task, NULL, sp, 0, "");
|
|
||||||
}
|
|
||||||
|
|
||||||
/*
|
|
||||||
* The architecture-independent dump_stack generator
|
|
||||||
*/
|
|
||||||
void dump_stack(void)
|
|
||||||
{
|
|
||||||
unsigned long bp = 0;
|
|
||||||
unsigned long stack;
|
|
||||||
|
|
||||||
#ifdef CONFIG_FRAME_POINTER
|
|
||||||
if (!bp)
|
|
||||||
get_bp(bp);
|
|
||||||
#endif
|
|
||||||
|
|
||||||
printk("Pid: %d, comm: %.20s %s %s %.*s\n",
|
|
||||||
current->pid, current->comm, print_tainted(),
|
|
||||||
init_utsname()->release,
|
|
||||||
(int)strcspn(init_utsname()->version, " "),
|
|
||||||
init_utsname()->version);
|
|
||||||
show_trace(NULL, NULL, &stack, bp);
|
|
||||||
}
|
|
||||||
|
|
||||||
EXPORT_SYMBOL(dump_stack);
|
|
||||||
|
|
||||||
void show_registers(struct pt_regs *regs)
|
void show_registers(struct pt_regs *regs)
|
||||||
{
|
{
|
||||||
|
|
@ -283,159 +149,3 @@ int is_valid_bugaddr(unsigned long ip)
|
||||||
return ud2 == 0x0b0f;
|
return ud2 == 0x0b0f;
|
||||||
}
|
}
|
||||||
|
|
||||||
static raw_spinlock_t die_lock = __RAW_SPIN_LOCK_UNLOCKED;
|
|
||||||
static int die_owner = -1;
|
|
||||||
static unsigned int die_nest_count;
|
|
||||||
|
|
||||||
unsigned __kprobes long oops_begin(void)
|
|
||||||
{
|
|
||||||
int cpu;
|
|
||||||
unsigned long flags;
|
|
||||||
|
|
||||||
oops_enter();
|
|
||||||
|
|
||||||
/* racy, but better than risking deadlock. */
|
|
||||||
raw_local_irq_save(flags);
|
|
||||||
cpu = smp_processor_id();
|
|
||||||
if (!__raw_spin_trylock(&die_lock)) {
|
|
||||||
if (cpu == die_owner)
|
|
||||||
/* nested oops. should stop eventually */;
|
|
||||||
else
|
|
||||||
__raw_spin_lock(&die_lock);
|
|
||||||
}
|
|
||||||
die_nest_count++;
|
|
||||||
die_owner = cpu;
|
|
||||||
console_verbose();
|
|
||||||
bust_spinlocks(1);
|
|
||||||
return flags;
|
|
||||||
}
|
|
||||||
|
|
||||||
void __kprobes oops_end(unsigned long flags, struct pt_regs *regs, int signr)
|
|
||||||
{
|
|
||||||
if (regs && kexec_should_crash(current))
|
|
||||||
crash_kexec(regs);
|
|
||||||
|
|
||||||
bust_spinlocks(0);
|
|
||||||
die_owner = -1;
|
|
||||||
add_taint(TAINT_DIE);
|
|
||||||
die_nest_count--;
|
|
||||||
if (!die_nest_count)
|
|
||||||
/* Nest count reaches zero, release the lock. */
|
|
||||||
__raw_spin_unlock(&die_lock);
|
|
||||||
raw_local_irq_restore(flags);
|
|
||||||
oops_exit();
|
|
||||||
|
|
||||||
if (!signr)
|
|
||||||
return;
|
|
||||||
if (in_interrupt())
|
|
||||||
panic("Fatal exception in interrupt");
|
|
||||||
if (panic_on_oops)
|
|
||||||
panic("Fatal exception");
|
|
||||||
do_exit(signr);
|
|
||||||
}
|
|
||||||
|
|
||||||
int __kprobes __die(const char *str, struct pt_regs *regs, long err)
|
|
||||||
{
|
|
||||||
unsigned short ss;
|
|
||||||
unsigned long sp;
|
|
||||||
|
|
||||||
printk(KERN_EMERG "%s: %04lx [#%d] ", str, err & 0xffff, ++die_counter);
|
|
||||||
#ifdef CONFIG_PREEMPT
|
|
||||||
printk("PREEMPT ");
|
|
||||||
#endif
|
|
||||||
#ifdef CONFIG_SMP
|
|
||||||
printk("SMP ");
|
|
||||||
#endif
|
|
||||||
#ifdef CONFIG_DEBUG_PAGEALLOC
|
|
||||||
printk("DEBUG_PAGEALLOC");
|
|
||||||
#endif
|
|
||||||
printk("\n");
|
|
||||||
sysfs_printk_last_file();
|
|
||||||
if (notify_die(DIE_OOPS, str, regs, err,
|
|
||||||
current->thread.trap_no, SIGSEGV) == NOTIFY_STOP)
|
|
||||||
return 1;
|
|
||||||
|
|
||||||
show_registers(regs);
|
|
||||||
/* Executive summary in case the oops scrolled away */
|
|
||||||
sp = (unsigned long) (®s->sp);
|
|
||||||
savesegment(ss, ss);
|
|
||||||
if (user_mode(regs)) {
|
|
||||||
sp = regs->sp;
|
|
||||||
ss = regs->ss & 0xffff;
|
|
||||||
}
|
|
||||||
printk(KERN_EMERG "EIP: [<%08lx>] ", regs->ip);
|
|
||||||
print_symbol("%s", regs->ip);
|
|
||||||
printk(" SS:ESP %04x:%08lx\n", ss, sp);
|
|
||||||
return 0;
|
|
||||||
}
|
|
||||||
|
|
||||||
/*
|
|
||||||
* This is gone through when something in the kernel has done something bad
|
|
||||||
* and is about to be terminated:
|
|
||||||
*/
|
|
||||||
void die(const char *str, struct pt_regs *regs, long err)
|
|
||||||
{
|
|
||||||
unsigned long flags = oops_begin();
|
|
||||||
int sig = SIGSEGV;
|
|
||||||
|
|
||||||
if (!user_mode_vm(regs))
|
|
||||||
report_bug(regs->ip, regs);
|
|
||||||
|
|
||||||
if (__die(str, regs, err))
|
|
||||||
sig = 0;
|
|
||||||
oops_end(flags, regs, sig);
|
|
||||||
}
|
|
||||||
|
|
||||||
void notrace __kprobes
|
|
||||||
die_nmi(char *str, struct pt_regs *regs, int do_panic)
|
|
||||||
{
|
|
||||||
unsigned long flags;
|
|
||||||
|
|
||||||
if (notify_die(DIE_NMIWATCHDOG, str, regs, 0, 2, SIGINT) == NOTIFY_STOP)
|
|
||||||
return;
|
|
||||||
|
|
||||||
/*
|
|
||||||
* We are in trouble anyway, lets at least try
|
|
||||||
* to get a message out.
|
|
||||||
*/
|
|
||||||
flags = oops_begin();
|
|
||||||
printk(KERN_EMERG "%s", str);
|
|
||||||
printk(" on CPU%d, ip %08lx, registers:\n",
|
|
||||||
smp_processor_id(), regs->ip);
|
|
||||||
show_registers(regs);
|
|
||||||
oops_end(flags, regs, 0);
|
|
||||||
if (do_panic || panic_on_oops)
|
|
||||||
panic("Non maskable interrupt");
|
|
||||||
nmi_exit();
|
|
||||||
local_irq_enable();
|
|
||||||
do_exit(SIGBUS);
|
|
||||||
}
|
|
||||||
|
|
||||||
static int __init oops_setup(char *s)
|
|
||||||
{
|
|
||||||
if (!s)
|
|
||||||
return -EINVAL;
|
|
||||||
if (!strcmp(s, "panic"))
|
|
||||||
panic_on_oops = 1;
|
|
||||||
return 0;
|
|
||||||
}
|
|
||||||
early_param("oops", oops_setup);
|
|
||||||
|
|
||||||
static int __init kstack_setup(char *s)
|
|
||||||
{
|
|
||||||
if (!s)
|
|
||||||
return -EINVAL;
|
|
||||||
kstack_depth_to_print = simple_strtoul(s, NULL, 0);
|
|
||||||
return 0;
|
|
||||||
}
|
|
||||||
early_param("kstack", kstack_setup);
|
|
||||||
|
|
||||||
static int __init code_bytes_setup(char *s)
|
|
||||||
{
|
|
||||||
code_bytes = simple_strtoul(s, NULL, 0);
|
|
||||||
if (code_bytes > 8192)
|
|
||||||
code_bytes = 8192;
|
|
||||||
|
|
||||||
return 1;
|
|
||||||
}
|
|
||||||
__setup("code_bytes=", code_bytes_setup);
|
|
||||||
|
|
|
||||||
|
|
@ -17,19 +17,7 @@
|
||||||
|
|
||||||
#include <asm/stacktrace.h>
|
#include <asm/stacktrace.h>
|
||||||
|
|
||||||
#define STACKSLOTS_PER_LINE 4
|
#include "dumpstack.h"
|
||||||
#define get_bp(bp) asm("movq %%rbp, %0" : "=r" (bp) :)
|
|
||||||
|
|
||||||
int panic_on_unrecovered_nmi;
|
|
||||||
int kstack_depth_to_print = 3 * STACKSLOTS_PER_LINE;
|
|
||||||
static unsigned int code_bytes = 64;
|
|
||||||
static int die_counter;
|
|
||||||
|
|
||||||
void printk_address(unsigned long address, int reliable)
|
|
||||||
{
|
|
||||||
printk(" [<%p>] %s%pS\n", (void *) address,
|
|
||||||
reliable ? "" : "? ", (void *) address);
|
|
||||||
}
|
|
||||||
|
|
||||||
static unsigned long *in_exception_stack(unsigned cpu, unsigned long stack,
|
static unsigned long *in_exception_stack(unsigned cpu, unsigned long stack,
|
||||||
unsigned *usedp, char **idp)
|
unsigned *usedp, char **idp)
|
||||||
|
|
@ -113,51 +101,6 @@ static unsigned long *in_exception_stack(unsigned cpu, unsigned long stack,
|
||||||
* severe exception (double fault, nmi, stack fault, debug, mce) hardware stack
|
* severe exception (double fault, nmi, stack fault, debug, mce) hardware stack
|
||||||
*/
|
*/
|
||||||
|
|
||||||
static inline int valid_stack_ptr(struct thread_info *tinfo,
|
|
||||||
void *p, unsigned int size, void *end)
|
|
||||||
{
|
|
||||||
void *t = tinfo;
|
|
||||||
if (end) {
|
|
||||||
if (p < end && p >= (end-THREAD_SIZE))
|
|
||||||
return 1;
|
|
||||||
else
|
|
||||||
return 0;
|
|
||||||
}
|
|
||||||
return p > t && p < t + THREAD_SIZE - size;
|
|
||||||
}
|
|
||||||
|
|
||||||
/* The form of the top of the frame on the stack */
|
|
||||||
struct stack_frame {
|
|
||||||
struct stack_frame *next_frame;
|
|
||||||
unsigned long return_address;
|
|
||||||
};
|
|
||||||
|
|
||||||
static inline unsigned long
|
|
||||||
print_context_stack(struct thread_info *tinfo,
|
|
||||||
unsigned long *stack, unsigned long bp,
|
|
||||||
const struct stacktrace_ops *ops, void *data,
|
|
||||||
unsigned long *end)
|
|
||||||
{
|
|
||||||
struct stack_frame *frame = (struct stack_frame *)bp;
|
|
||||||
|
|
||||||
while (valid_stack_ptr(tinfo, stack, sizeof(*stack), end)) {
|
|
||||||
unsigned long addr;
|
|
||||||
|
|
||||||
addr = *stack;
|
|
||||||
if (__kernel_text_address(addr)) {
|
|
||||||
if ((unsigned long) stack == bp + sizeof(long)) {
|
|
||||||
ops->address(data, addr, 1);
|
|
||||||
frame = frame->next_frame;
|
|
||||||
bp = (unsigned long) frame;
|
|
||||||
} else {
|
|
||||||
ops->address(data, addr, bp == 0);
|
|
||||||
}
|
|
||||||
}
|
|
||||||
stack++;
|
|
||||||
}
|
|
||||||
return bp;
|
|
||||||
}
|
|
||||||
|
|
||||||
void dump_trace(struct task_struct *task, struct pt_regs *regs,
|
void dump_trace(struct task_struct *task, struct pt_regs *regs,
|
||||||
unsigned long *stack, unsigned long bp,
|
unsigned long *stack, unsigned long bp,
|
||||||
const struct stacktrace_ops *ops, void *data)
|
const struct stacktrace_ops *ops, void *data)
|
||||||
|
|
@ -248,57 +191,7 @@ void dump_trace(struct task_struct *task, struct pt_regs *regs,
|
||||||
}
|
}
|
||||||
EXPORT_SYMBOL(dump_trace);
|
EXPORT_SYMBOL(dump_trace);
|
||||||
|
|
||||||
static void
|
void
|
||||||
print_trace_warning_symbol(void *data, char *msg, unsigned long symbol)
|
|
||||||
{
|
|
||||||
printk(data);
|
|
||||||
print_symbol(msg, symbol);
|
|
||||||
printk("\n");
|
|
||||||
}
|
|
||||||
|
|
||||||
static void print_trace_warning(void *data, char *msg)
|
|
||||||
{
|
|
||||||
printk("%s%s\n", (char *)data, msg);
|
|
||||||
}
|
|
||||||
|
|
||||||
static int print_trace_stack(void *data, char *name)
|
|
||||||
{
|
|
||||||
printk("%s <%s> ", (char *)data, name);
|
|
||||||
return 0;
|
|
||||||
}
|
|
||||||
|
|
||||||
/*
|
|
||||||
* Print one address/symbol entries per line.
|
|
||||||
*/
|
|
||||||
static void print_trace_address(void *data, unsigned long addr, int reliable)
|
|
||||||
{
|
|
||||||
touch_nmi_watchdog();
|
|
||||||
printk(data);
|
|
||||||
printk_address(addr, reliable);
|
|
||||||
}
|
|
||||||
|
|
||||||
static const struct stacktrace_ops print_trace_ops = {
|
|
||||||
.warning = print_trace_warning,
|
|
||||||
.warning_symbol = print_trace_warning_symbol,
|
|
||||||
.stack = print_trace_stack,
|
|
||||||
.address = print_trace_address,
|
|
||||||
};
|
|
||||||
|
|
||||||
static void
|
|
||||||
show_trace_log_lvl(struct task_struct *task, struct pt_regs *regs,
|
|
||||||
unsigned long *stack, unsigned long bp, char *log_lvl)
|
|
||||||
{
|
|
||||||
printk("%sCall Trace:\n", log_lvl);
|
|
||||||
dump_trace(task, regs, stack, bp, &print_trace_ops, log_lvl);
|
|
||||||
}
|
|
||||||
|
|
||||||
void show_trace(struct task_struct *task, struct pt_regs *regs,
|
|
||||||
unsigned long *stack, unsigned long bp)
|
|
||||||
{
|
|
||||||
show_trace_log_lvl(task, regs, stack, bp, "");
|
|
||||||
}
|
|
||||||
|
|
||||||
static void
|
|
||||||
show_stack_log_lvl(struct task_struct *task, struct pt_regs *regs,
|
show_stack_log_lvl(struct task_struct *task, struct pt_regs *regs,
|
||||||
unsigned long *sp, unsigned long bp, char *log_lvl)
|
unsigned long *sp, unsigned long bp, char *log_lvl)
|
||||||
{
|
{
|
||||||
|
|
@ -342,33 +235,6 @@ show_stack_log_lvl(struct task_struct *task, struct pt_regs *regs,
|
||||||
show_trace_log_lvl(task, regs, sp, bp, log_lvl);
|
show_trace_log_lvl(task, regs, sp, bp, log_lvl);
|
||||||
}
|
}
|
||||||
|
|
||||||
void show_stack(struct task_struct *task, unsigned long *sp)
|
|
||||||
{
|
|
||||||
show_stack_log_lvl(task, NULL, sp, 0, "");
|
|
||||||
}
|
|
||||||
|
|
||||||
/*
|
|
||||||
* The architecture-independent dump_stack generator
|
|
||||||
*/
|
|
||||||
void dump_stack(void)
|
|
||||||
{
|
|
||||||
unsigned long bp = 0;
|
|
||||||
unsigned long stack;
|
|
||||||
|
|
||||||
#ifdef CONFIG_FRAME_POINTER
|
|
||||||
if (!bp)
|
|
||||||
get_bp(bp);
|
|
||||||
#endif
|
|
||||||
|
|
||||||
printk("Pid: %d, comm: %.20s %s %s %.*s\n",
|
|
||||||
current->pid, current->comm, print_tainted(),
|
|
||||||
init_utsname()->release,
|
|
||||||
(int)strcspn(init_utsname()->version, " "),
|
|
||||||
init_utsname()->version);
|
|
||||||
show_trace(NULL, NULL, &stack, bp);
|
|
||||||
}
|
|
||||||
EXPORT_SYMBOL(dump_stack);
|
|
||||||
|
|
||||||
void show_registers(struct pt_regs *regs)
|
void show_registers(struct pt_regs *regs)
|
||||||
{
|
{
|
||||||
int i;
|
int i;
|
||||||
|
|
@ -429,150 +295,3 @@ int is_valid_bugaddr(unsigned long ip)
|
||||||
return ud2 == 0x0b0f;
|
return ud2 == 0x0b0f;
|
||||||
}
|
}
|
||||||
|
|
||||||
static raw_spinlock_t die_lock = __RAW_SPIN_LOCK_UNLOCKED;
|
|
||||||
static int die_owner = -1;
|
|
||||||
static unsigned int die_nest_count;
|
|
||||||
|
|
||||||
unsigned __kprobes long oops_begin(void)
|
|
||||||
{
|
|
||||||
int cpu;
|
|
||||||
unsigned long flags;
|
|
||||||
|
|
||||||
oops_enter();
|
|
||||||
|
|
||||||
/* racy, but better than risking deadlock. */
|
|
||||||
raw_local_irq_save(flags);
|
|
||||||
cpu = smp_processor_id();
|
|
||||||
if (!__raw_spin_trylock(&die_lock)) {
|
|
||||||
if (cpu == die_owner)
|
|
||||||
/* nested oops. should stop eventually */;
|
|
||||||
else
|
|
||||||
__raw_spin_lock(&die_lock);
|
|
||||||
}
|
|
||||||
die_nest_count++;
|
|
||||||
die_owner = cpu;
|
|
||||||
console_verbose();
|
|
||||||
bust_spinlocks(1);
|
|
||||||
return flags;
|
|
||||||
}
|
|
||||||
|
|
||||||
void __kprobes oops_end(unsigned long flags, struct pt_regs *regs, int signr)
|
|
||||||
{
|
|
||||||
if (regs && kexec_should_crash(current))
|
|
||||||
crash_kexec(regs);
|
|
||||||
|
|
||||||
bust_spinlocks(0);
|
|
||||||
die_owner = -1;
|
|
||||||
add_taint(TAINT_DIE);
|
|
||||||
die_nest_count--;
|
|
||||||
if (!die_nest_count)
|
|
||||||
/* Nest count reaches zero, release the lock. */
|
|
||||||
__raw_spin_unlock(&die_lock);
|
|
||||||
raw_local_irq_restore(flags);
|
|
||||||
oops_exit();
|
|
||||||
|
|
||||||
if (!signr)
|
|
||||||
return;
|
|
||||||
if (in_interrupt())
|
|
||||||
panic("Fatal exception in interrupt");
|
|
||||||
if (panic_on_oops)
|
|
||||||
panic("Fatal exception");
|
|
||||||
do_exit(signr);
|
|
||||||
}
|
|
||||||
|
|
||||||
int __kprobes __die(const char *str, struct pt_regs *regs, long err)
|
|
||||||
{
|
|
||||||
printk(KERN_EMERG "%s: %04lx [#%d] ", str, err & 0xffff, ++die_counter);
|
|
||||||
#ifdef CONFIG_PREEMPT
|
|
||||||
printk("PREEMPT ");
|
|
||||||
#endif
|
|
||||||
#ifdef CONFIG_SMP
|
|
||||||
printk("SMP ");
|
|
||||||
#endif
|
|
||||||
#ifdef CONFIG_DEBUG_PAGEALLOC
|
|
||||||
printk("DEBUG_PAGEALLOC");
|
|
||||||
#endif
|
|
||||||
printk("\n");
|
|
||||||
sysfs_printk_last_file();
|
|
||||||
if (notify_die(DIE_OOPS, str, regs, err,
|
|
||||||
current->thread.trap_no, SIGSEGV) == NOTIFY_STOP)
|
|
||||||
return 1;
|
|
||||||
|
|
||||||
show_registers(regs);
|
|
||||||
/* Executive summary in case the oops scrolled away */
|
|
||||||
printk(KERN_ALERT "RIP ");
|
|
||||||
printk_address(regs->ip, 1);
|
|
||||||
printk(" RSP <%016lx>\n", regs->sp);
|
|
||||||
return 0;
|
|
||||||
}
|
|
||||||
|
|
||||||
/*
|
|
||||||
* This is gone through when something in the kernel has done something bad
|
|
||||||
* and is about to be terminated:
|
|
||||||
*/
|
|
||||||
void die(const char *str, struct pt_regs *regs, long err)
|
|
||||||
{
|
|
||||||
unsigned long flags = oops_begin();
|
|
||||||
int sig = SIGSEGV;
|
|
||||||
|
|
||||||
if (!user_mode_vm(regs))
|
|
||||||
report_bug(regs->ip, regs);
|
|
||||||
|
|
||||||
if (__die(str, regs, err))
|
|
||||||
sig = 0;
|
|
||||||
oops_end(flags, regs, sig);
|
|
||||||
}
|
|
||||||
|
|
||||||
void notrace __kprobes
|
|
||||||
die_nmi(char *str, struct pt_regs *regs, int do_panic)
|
|
||||||
{
|
|
||||||
unsigned long flags;
|
|
||||||
|
|
||||||
if (notify_die(DIE_NMIWATCHDOG, str, regs, 0, 2, SIGINT) == NOTIFY_STOP)
|
|
||||||
return;
|
|
||||||
|
|
||||||
/*
|
|
||||||
* We are in trouble anyway, lets at least try
|
|
||||||
* to get a message out.
|
|
||||||
*/
|
|
||||||
flags = oops_begin();
|
|
||||||
printk(KERN_EMERG "%s", str);
|
|
||||||
printk(" on CPU%d, ip %08lx, registers:\n",
|
|
||||||
smp_processor_id(), regs->ip);
|
|
||||||
show_registers(regs);
|
|
||||||
oops_end(flags, regs, 0);
|
|
||||||
if (do_panic || panic_on_oops)
|
|
||||||
panic("Non maskable interrupt");
|
|
||||||
nmi_exit();
|
|
||||||
local_irq_enable();
|
|
||||||
do_exit(SIGBUS);
|
|
||||||
}
|
|
||||||
|
|
||||||
static int __init oops_setup(char *s)
|
|
||||||
{
|
|
||||||
if (!s)
|
|
||||||
return -EINVAL;
|
|
||||||
if (!strcmp(s, "panic"))
|
|
||||||
panic_on_oops = 1;
|
|
||||||
return 0;
|
|
||||||
}
|
|
||||||
early_param("oops", oops_setup);
|
|
||||||
|
|
||||||
static int __init kstack_setup(char *s)
|
|
||||||
{
|
|
||||||
if (!s)
|
|
||||||
return -EINVAL;
|
|
||||||
kstack_depth_to_print = simple_strtoul(s, NULL, 0);
|
|
||||||
return 0;
|
|
||||||
}
|
|
||||||
early_param("kstack", kstack_setup);
|
|
||||||
|
|
||||||
static int __init code_bytes_setup(char *s)
|
|
||||||
{
|
|
||||||
code_bytes = simple_strtoul(s, NULL, 0);
|
|
||||||
if (code_bytes > 8192)
|
|
||||||
code_bytes = 8192;
|
|
||||||
|
|
||||||
return 1;
|
|
||||||
}
|
|
||||||
__setup("code_bytes=", code_bytes_setup);
|
|
||||||
|
|
|
||||||
Загрузка…
Ссылка в новой задаче