diff options
Diffstat (limited to 'ANDROID_3.4.5/arch/x86/kernel/dumpstack.c')
-rw-r--r-- | ANDROID_3.4.5/arch/x86/kernel/dumpstack.c | 329 |
1 files changed, 0 insertions, 329 deletions
diff --git a/ANDROID_3.4.5/arch/x86/kernel/dumpstack.c b/ANDROID_3.4.5/arch/x86/kernel/dumpstack.c deleted file mode 100644 index 1b81839b..00000000 --- a/ANDROID_3.4.5/arch/x86/kernel/dumpstack.c +++ /dev/null @@ -1,329 +0,0 @@ -/* - * Copyright (C) 1991, 1992 Linus Torvalds - * Copyright (C) 2000, 2001, 2002 Andi Kleen, SuSE Labs - */ -#include <linux/kallsyms.h> -#include <linux/kprobes.h> -#include <linux/uaccess.h> -#include <linux/utsname.h> -#include <linux/hardirq.h> -#include <linux/kdebug.h> -#include <linux/module.h> -#include <linux/ptrace.h> -#include <linux/ftrace.h> -#include <linux/kexec.h> -#include <linux/bug.h> -#include <linux/nmi.h> -#include <linux/sysfs.h> - -#include <asm/stacktrace.h> - - -int panic_on_unrecovered_nmi; -int panic_on_io_nmi; -unsigned int code_bytes = 64; -int kstack_depth_to_print = 3 * STACKSLOTS_PER_LINE; -static int die_counter; - -void printk_address(unsigned long address, int reliable) -{ - printk(" [<%p>] %s%pB\n", (void *) address, - reliable ? "" : "? ", (void *) address); -} - -#ifdef CONFIG_FUNCTION_GRAPH_TRACER -static void -print_ftrace_graph_addr(unsigned long addr, void *data, - const struct stacktrace_ops *ops, - struct thread_info *tinfo, int *graph) -{ - struct task_struct *task; - unsigned long ret_addr; - int index; - - if (addr != (unsigned long)return_to_handler) - return; - - task = tinfo->task; - index = task->curr_ret_stack; - - if (!task->ret_stack || index < *graph) - return; - - index -= *graph; - ret_addr = task->ret_stack[index].ret; - - ops->address(data, ret_addr, 1); - - (*graph)++; -} -#else -static inline void -print_ftrace_graph_addr(unsigned long addr, void *data, - const struct stacktrace_ops *ops, - struct thread_info *tinfo, int *graph) -{ } -#endif - -/* - * x86-64 can have up to three kernel stacks: - * process stack - * interrupt 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; -} - -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, int *graph) -{ - 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, 0); - } - print_ftrace_graph_addr(addr, data, ops, tinfo, graph); - } - stack++; - } - return bp; -} -EXPORT_SYMBOL_GPL(print_context_stack); - -unsigned long -print_context_stack_bp(struct thread_info *tinfo, - unsigned long *stack, unsigned long bp, - const struct stacktrace_ops *ops, void *data, - unsigned long *end, int *graph) -{ - struct stack_frame *frame = (struct stack_frame *)bp; - unsigned long *ret_addr = &frame->return_address; - - while (valid_stack_ptr(tinfo, ret_addr, sizeof(*ret_addr), end)) { - unsigned long addr = *ret_addr; - - if (!__kernel_text_address(addr)) - break; - - ops->address(data, addr, 1); - frame = frame->next_frame; - ret_addr = &frame->return_address; - print_ftrace_graph_addr(addr, data, ops, tinfo, graph); - } - - return (unsigned long)frame; -} -EXPORT_SYMBOL_GPL(print_context_stack_bp); - -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 = { - .stack = print_trace_stack, - .address = print_trace_address, - .walk_stack = print_context_stack, -}; - -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, ""); -} - -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; - unsigned long stack; - - bp = stack_frame(current, NULL); - 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); - -static arch_spinlock_t die_lock = __ARCH_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 (!arch_spin_trylock(&die_lock)) { - if (cpu == die_owner) - /* nested oops. should stop eventually */; - else - arch_spin_lock(&die_lock); - } - die_nest_count++; - die_owner = cpu; - console_verbose(); - bust_spinlocks(1); - return flags; -} -EXPORT_SYMBOL_GPL(oops_begin); - -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. */ - arch_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) -{ -#ifdef CONFIG_X86_32 - unsigned short ss; - unsigned long sp; -#endif - printk(KERN_DEFAULT - "%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_nr, SIGSEGV) == NOTIFY_STOP) - return 1; - - show_registers(regs); -#ifdef CONFIG_X86_32 - if (user_mode_vm(regs)) { - sp = regs->sp; - ss = regs->ss & 0xffff; - } else { - sp = kernel_stack_pointer(regs); - savesegment(ss, ss); - } - printk(KERN_EMERG "EIP: [<%08lx>] ", regs->ip); - print_symbol("%s", regs->ip); - printk(" SS:ESP %04x:%08lx\n", ss, sp); -#else - /* Executive summary in case the oops scrolled away */ - printk(KERN_ALERT "RIP "); - printk_address(regs->ip, 1); - printk(" RSP <%016lx>\n", regs->sp); -#endif - 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); -} - -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); |