mirror of https://gitee.com/openkylin/linux.git
i386: split out dumpstack code from traps_32.c
The dumpstack code is logically quite independent from the hardware traps. Split it out into its own file. Signed-off-by: Alexander van Heukelum <heukelum@fastmail.fm> Signed-off-by: Ingo Molnar <mingo@elte.hu>
This commit is contained in:
Alexander van Heukelum
Ingo Molnar
parent
af5c2bd16a
commit
2bc5f927d4
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@ -28,7 +28,7 @@ obj-y += time_$(BITS).o ioport.o ldt.o
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obj-y += setup.o i8259.o irqinit_$(BITS).o setup_percpu.o
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obj-$(CONFIG_X86_VISWS) += visws_quirks.o
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obj-$(CONFIG_X86_32) += probe_roms_32.o
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obj-$(CONFIG_X86_32) += sys_i386_32.o i386_ksyms_32.o
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obj-$(CONFIG_X86_32) += sys_i386_32.o i386_ksyms_32.o dumpstack_32.o
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obj-$(CONFIG_X86_64) += sys_x86_64.o x8664_ksyms_64.o
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obj-$(CONFIG_X86_64) += syscall_64.o vsyscall_64.o
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obj-y += bootflag.o e820.o
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@ -0,0 +1,422 @@
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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 <asm/stacktrace.h>
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int panic_on_unrecovered_nmi;
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int kstack_depth_to_print = 24;
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static unsigned int code_bytes = 64;
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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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#ifdef CONFIG_KALLSYMS
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unsigned long offset = 0;
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unsigned long symsize;
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const char *symname;
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char *modname;
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char *delim = ":";
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char namebuf[KSYM_NAME_LEN];
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char reliab[4] = "";
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symname = kallsyms_lookup(address, &symsize, &offset,
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&modname, namebuf);
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if (!symname) {
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printk(" [<%08lx>]\n", address);
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return;
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}
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if (!reliable)
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strcpy(reliab, "? ");
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if (!modname)
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modname = delim = "";
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printk(" [<%08lx>] %s%s%s%s%s+0x%lx/0x%lx\n",
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address, reliab, delim, modname, delim, symname, offset, symsize);
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#else
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printk(" [<%08lx>]\n", address);
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#endif
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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)
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{
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void *t = tinfo;
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return p > t && p <= t + THREAD_SIZE - size;
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}
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/* The form of the top of the frame on the stack */
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struct stack_frame {
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struct stack_frame *next_frame;
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unsigned long return_address;
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};
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static inline 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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{
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struct stack_frame *frame = (struct stack_frame *)bp;
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while (valid_stack_ptr(tinfo, stack, sizeof(*stack))) {
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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 + 4) {
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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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void dump_trace(struct task_struct *task, struct pt_regs *regs,
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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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{
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if (!task)
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task = current;
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if (!stack) {
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unsigned long dummy;
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stack = &dummy;
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if (task != current)
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stack = (unsigned long *)task->thread.sp;
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}
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#ifdef CONFIG_FRAME_POINTER
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if (!bp) {
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if (task == current) {
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/* Grab bp right from our regs */
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asm("movl %%ebp, %0" : "=r" (bp) :);
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} else {
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/* bp is the last reg pushed by switch_to */
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bp = *(unsigned long *) task->thread.sp;
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}
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}
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#endif
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for (;;) {
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struct thread_info *context;
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context = (struct thread_info *)
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((unsigned long)stack & (~(THREAD_SIZE - 1)));
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bp = print_context_stack(context, stack, bp, ops, data);
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/*
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* Should be after the line below, but somewhere
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* in early boot context comes out corrupted and we
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* can't reference it:
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*/
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if (ops->stack(data, "IRQ") < 0)
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break;
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stack = (unsigned long *)context->previous_esp;
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if (!stack)
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break;
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touch_nmi_watchdog();
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}
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}
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EXPORT_SYMBOL(dump_trace);
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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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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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printk("%s [<%08lx>] ", (char *)data, addr);
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if (!reliable)
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printk("? ");
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print_symbol("%s\n", addr);
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touch_nmi_watchdog();
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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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static 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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dump_trace(task, regs, stack, bp, &print_trace_ops, log_lvl);
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printk("%s =======================\n", 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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static void
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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)
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{
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unsigned long *stack;
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int i;
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if (sp == NULL) {
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if (task)
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sp = (unsigned long *)task->thread.sp;
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else
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sp = (unsigned long *)&sp;
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}
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stack = sp;
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for (i = 0; i < kstack_depth_to_print; i++) {
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if (kstack_end(stack))
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break;
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if (i && ((i % 8) == 0))
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printk("\n%s ", log_lvl);
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printk("%08lx ", *stack++);
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}
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printk("\n%sCall Trace:\n", log_lvl);
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show_trace_log_lvl(task, regs, sp, bp, log_lvl);
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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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printk(" ");
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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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asm("movl %%ebp, %0" : "=r" (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(current, NULL, &stack, bp);
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}
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EXPORT_SYMBOL(dump_stack);
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void show_registers(struct pt_regs *regs)
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{
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int i;
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print_modules();
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__show_regs(regs, 0);
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printk(KERN_EMERG "Process %.*s (pid: %d, ti=%p task=%p task.ti=%p)",
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TASK_COMM_LEN, current->comm, task_pid_nr(current),
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current_thread_info(), current, task_thread_info(current));
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/*
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* When in-kernel, we also print out the stack and code at the
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* time of the fault..
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*/
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if (!user_mode_vm(regs)) {
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unsigned int code_prologue = code_bytes * 43 / 64;
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unsigned int code_len = code_bytes;
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unsigned char c;
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u8 *ip;
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printk("\n" KERN_EMERG "Stack: ");
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show_stack_log_lvl(NULL, regs, ®s->sp, 0, KERN_EMERG);
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printk(KERN_EMERG "Code: ");
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ip = (u8 *)regs->ip - code_prologue;
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if (ip < (u8 *)PAGE_OFFSET || probe_kernel_address(ip, c)) {
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/* try starting at EIP */
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ip = (u8 *)regs->ip;
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code_len = code_len - code_prologue + 1;
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}
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for (i = 0; i < code_len; i++, ip++) {
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if (ip < (u8 *)PAGE_OFFSET ||
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probe_kernel_address(ip, c)) {
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printk(" Bad EIP value.");
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break;
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}
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if (ip == (u8 *)regs->ip)
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printk("<%02x> ", c);
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else
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printk("%02x ", c);
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}
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}
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printk("\n");
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}
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int is_valid_bugaddr(unsigned long ip)
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{
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unsigned short ud2;
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if (ip < PAGE_OFFSET)
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return 0;
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if (probe_kernel_address((unsigned short *)ip, ud2))
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return 0;
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return ud2 == 0x0b0f;
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}
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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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unsigned long flags;
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oops_enter();
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if (die_owner != raw_smp_processor_id()) {
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console_verbose();
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raw_local_irq_save(flags);
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__raw_spin_lock(&die_lock);
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die_owner = smp_processor_id();
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die_nest_count = 0;
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bust_spinlocks(1);
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} else {
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raw_local_irq_save(flags);
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}
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die_nest_count++;
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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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bust_spinlocks(0);
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die_owner = -1;
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add_taint(TAINT_DIE);
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__raw_spin_unlock(&die_lock);
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raw_local_irq_restore(flags);
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if (!regs)
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return;
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if (kexec_should_crash(current))
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crash_kexec(regs);
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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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oops_exit();
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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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unsigned short ss;
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unsigned long sp;
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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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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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/* Executive summary in case the oops scrolled away */
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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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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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if (die_nest_count < 3) {
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report_bug(regs->ip, regs);
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if (__die(str, regs, err))
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regs = NULL;
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} else {
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printk(KERN_EMERG "Recursive die() failure, output suppressed\n");
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}
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oops_end(flags, regs, SIGSEGV);
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}
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static int __init kstack_setup(char *s)
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{
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kstack_depth_to_print = simple_strtoul(s, NULL, 0);
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return 1;
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}
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__setup("kstack=", kstack_setup);
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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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return 1;
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}
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__setup("code_bytes=", code_bytes_setup);
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@ -80,11 +80,7 @@ char ignore_fpu_irq;
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gate_desc idt_table[256]
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__attribute__((__section__(".data.idt"))) = { { { { 0, 0 } } }, };
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int panic_on_unrecovered_nmi;
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int kstack_depth_to_print = 24;
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static unsigned int code_bytes = 64;
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static int ignore_nmis;
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static int die_counter;
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static inline void conditional_sti(struct pt_regs *regs)
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{
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@ -92,388 +88,6 @@ static inline void conditional_sti(struct pt_regs *regs)
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local_irq_enable();
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}
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void printk_address(unsigned long address, int reliable)
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{
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#ifdef CONFIG_KALLSYMS
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unsigned long offset = 0;
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unsigned long symsize;
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const char *symname;
|
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char *modname;
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char *delim = ":";
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char namebuf[KSYM_NAME_LEN];
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char reliab[4] = "";
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symname = kallsyms_lookup(address, &symsize, &offset,
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&modname, namebuf);
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if (!symname) {
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printk(" [<%08lx>]\n", address);
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return;
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}
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if (!reliable)
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strcpy(reliab, "? ");
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if (!modname)
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modname = delim = "";
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printk(" [<%08lx>] %s%s%s%s%s+0x%lx/0x%lx\n",
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address, reliab, delim, modname, delim, symname, offset, symsize);
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#else
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printk(" [<%08lx>]\n", address);
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#endif
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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)
|
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{
|
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void *t = tinfo;
|
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return p > t && p <= t + THREAD_SIZE - size;
|
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}
|
||||
|
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/* The form of the top of the frame on the stack */
|
||||
struct stack_frame {
|
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struct stack_frame *next_frame;
|
||||
unsigned long return_address;
|
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};
|
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|
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static inline 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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{
|
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struct stack_frame *frame = (struct stack_frame *)bp;
|
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|
||||
while (valid_stack_ptr(tinfo, stack, sizeof(*stack))) {
|
||||
unsigned long addr;
|
||||
|
||||
addr = *stack;
|
||||
if (__kernel_text_address(addr)) {
|
||||
if ((unsigned long) stack == bp + 4) {
|
||||
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,
|
||||
unsigned long *stack, unsigned long bp,
|
||||
const struct stacktrace_ops *ops, void *data)
|
||||
{
|
||||
if (!task)
|
||||
task = current;
|
||||
|
||||
if (!stack) {
|
||||
unsigned long dummy;
|
||||
stack = &dummy;
|
||||
if (task != current)
|
||||
stack = (unsigned long *)task->thread.sp;
|
||||
}
|
||||
|
||||
#ifdef CONFIG_FRAME_POINTER
|
||||
if (!bp) {
|
||||
if (task == current) {
|
||||
/* Grab bp right from our regs */
|
||||
asm("movl %%ebp, %0" : "=r" (bp) :);
|
||||
} else {
|
||||
/* bp is the last reg pushed by switch_to */
|
||||
bp = *(unsigned long *) task->thread.sp;
|
||||
}
|
||||
}
|
||||
#endif
|
||||
|
||||
for (;;) {
|
||||
struct thread_info *context;
|
||||
|
||||
context = (struct thread_info *)
|
||||
((unsigned long)stack & (~(THREAD_SIZE - 1)));
|
||||
bp = print_context_stack(context, stack, bp, ops, data);
|
||||
/*
|
||||
* Should be after the line below, but somewhere
|
||||
* in early boot context comes out corrupted and we
|
||||
* can't reference it:
|
||||
*/
|
||||
if (ops->stack(data, "IRQ") < 0)
|
||||
break;
|
||||
stack = (unsigned long *)context->previous_esp;
|
||||
if (!stack)
|
||||
break;
|
||||
touch_nmi_watchdog();
|
||||
}
|
||||
}
|
||||
EXPORT_SYMBOL(dump_trace);
|
||||
|
||||
static 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)
|
||||
{
|
||||
return 0;
|
||||
}
|
||||
|
||||
/*
|
||||
* Print one address/symbol entries per line.
|
||||
*/
|
||||
static void print_trace_address(void *data, unsigned long addr, int reliable)
|
||||
{
|
||||
printk("%s [<%08lx>] ", (char *)data, addr);
|
||||
if (!reliable)
|
||||
printk("? ");
|
||||
print_symbol("%s\n", addr);
|
||||
touch_nmi_watchdog();
|
||||
}
|
||||
|
||||
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)
|
||||
{
|
||||
dump_trace(task, regs, stack, bp, &print_trace_ops, log_lvl);
|
||||
printk("%s =======================\n", 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,
|
||||
unsigned long *sp, unsigned long bp, char *log_lvl)
|
||||
{
|
||||
unsigned long *stack;
|
||||
int i;
|
||||
|
||||
if (sp == NULL) {
|
||||
if (task)
|
||||
sp = (unsigned long *)task->thread.sp;
|
||||
else
|
||||
sp = (unsigned long *)&sp;
|
||||
}
|
||||
|
||||
stack = sp;
|
||||
for (i = 0; i < kstack_depth_to_print; i++) {
|
||||
if (kstack_end(stack))
|
||||
break;
|
||||
if (i && ((i % 8) == 0))
|
||||
printk("\n%s ", log_lvl);
|
||||
printk("%08lx ", *stack++);
|
||||
}
|
||||
printk("\n%sCall Trace:\n", log_lvl);
|
||||
|
||||
show_trace_log_lvl(task, regs, sp, bp, log_lvl);
|
||||
}
|
||||
|
||||
void show_stack(struct task_struct *task, unsigned long *sp)
|
||||
{
|
||||
printk(" ");
|
||||
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)
|
||||
asm("movl %%ebp, %0" : "=r" (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(current, NULL, &stack, bp);
|
||||
}
|
||||
|
||||
EXPORT_SYMBOL(dump_stack);
|
||||
|
||||
void show_registers(struct pt_regs *regs)
|
||||
{
|
||||
int i;
|
||||
|
||||
print_modules();
|
||||
__show_regs(regs, 0);
|
||||
|
||||
printk(KERN_EMERG "Process %.*s (pid: %d, ti=%p task=%p task.ti=%p)",
|
||||
TASK_COMM_LEN, current->comm, task_pid_nr(current),
|
||||
current_thread_info(), current, task_thread_info(current));
|
||||
/*
|
||||
* When in-kernel, we also print out the stack and code at the
|
||||
* time of the fault..
|
||||
*/
|
||||
if (!user_mode_vm(regs)) {
|
||||
unsigned int code_prologue = code_bytes * 43 / 64;
|
||||
unsigned int code_len = code_bytes;
|
||||
unsigned char c;
|
||||
u8 *ip;
|
||||
|
||||
printk("\n" KERN_EMERG "Stack: ");
|
||||
show_stack_log_lvl(NULL, regs, ®s->sp, 0, KERN_EMERG);
|
||||
|
||||
printk(KERN_EMERG "Code: ");
|
||||
|
||||
ip = (u8 *)regs->ip - code_prologue;
|
||||
if (ip < (u8 *)PAGE_OFFSET || probe_kernel_address(ip, c)) {
|
||||
/* try starting at EIP */
|
||||
ip = (u8 *)regs->ip;
|
||||
code_len = code_len - code_prologue + 1;
|
||||
}
|
||||
for (i = 0; i < code_len; i++, ip++) {
|
||||
if (ip < (u8 *)PAGE_OFFSET ||
|
||||
probe_kernel_address(ip, c)) {
|
||||
printk(" Bad EIP value.");
|
||||
break;
|
||||
}
|
||||
if (ip == (u8 *)regs->ip)
|
||||
printk("<%02x> ", c);
|
||||
else
|
||||
printk("%02x ", c);
|
||||
}
|
||||
}
|
||||
printk("\n");
|
||||
}
|
||||
|
||||
int is_valid_bugaddr(unsigned long ip)
|
||||
{
|
||||
unsigned short ud2;
|
||||
|
||||
if (ip < PAGE_OFFSET)
|
||||
return 0;
|
||||
if (probe_kernel_address((unsigned short *)ip, ud2))
|
||||
return 0;
|
||||
|
||||
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)
|
||||
{
|
||||
unsigned long flags;
|
||||
|
||||
oops_enter();
|
||||
|
||||
if (die_owner != raw_smp_processor_id()) {
|
||||
console_verbose();
|
||||
raw_local_irq_save(flags);
|
||||
__raw_spin_lock(&die_lock);
|
||||
die_owner = smp_processor_id();
|
||||
die_nest_count = 0;
|
||||
bust_spinlocks(1);
|
||||
} else {
|
||||
raw_local_irq_save(flags);
|
||||
}
|
||||
die_nest_count++;
|
||||
return flags;
|
||||
}
|
||||
|
||||
void __kprobes oops_end(unsigned long flags, struct pt_regs *regs, int signr)
|
||||
{
|
||||
bust_spinlocks(0);
|
||||
die_owner = -1;
|
||||
add_taint(TAINT_DIE);
|
||||
__raw_spin_unlock(&die_lock);
|
||||
raw_local_irq_restore(flags);
|
||||
|
||||
if (!regs)
|
||||
return;
|
||||
|
||||
if (kexec_should_crash(current))
|
||||
crash_kexec(regs);
|
||||
|
||||
if (in_interrupt())
|
||||
panic("Fatal exception in interrupt");
|
||||
|
||||
if (panic_on_oops)
|
||||
panic("Fatal exception");
|
||||
|
||||
oops_exit();
|
||||
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");
|
||||
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();
|
||||
|
||||
if (die_nest_count < 3) {
|
||||
report_bug(regs->ip, regs);
|
||||
|
||||
if (__die(str, regs, err))
|
||||
regs = NULL;
|
||||
} else {
|
||||
printk(KERN_EMERG "Recursive die() failure, output suppressed\n");
|
||||
}
|
||||
|
||||
oops_end(flags, regs, SIGSEGV);
|
||||
}
|
||||
|
||||
static inline void
|
||||
die_if_kernel(const char *str, struct pt_regs *regs, long err)
|
||||
{
|
||||
|
|
@ -1256,21 +870,3 @@ void __init trap_init(void)
|
|||
|
||||
trap_init_hook();
|
||||
}
|
||||
|
||||
static int __init kstack_setup(char *s)
|
||||
{
|
||||
kstack_depth_to_print = simple_strtoul(s, NULL, 0);
|
||||
|
||||
return 1;
|
||||
}
|
||||
__setup("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);
|
||||
|
|
|
|||
Loading…
Reference in New Issue