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authorSrikant Patnaik2015-01-11 12:28:04 +0530
committerSrikant Patnaik2015-01-11 12:28:04 +0530
commit871480933a1c28f8a9fed4c4d34d06c439a7a422 (patch)
tree8718f573808810c2a1e8cb8fb6ac469093ca2784 /ANDROID_3.4.5/arch/x86/kernel/dumpstack_64.c
parent9d40ac5867b9aefe0722bc1f110b965ff294d30d (diff)
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Moved, renamed, and deleted files
The original directory structure was scattered and unorganized. Changes are basically to make it look like kernel structure.
Diffstat (limited to 'ANDROID_3.4.5/arch/x86/kernel/dumpstack_64.c')
-rw-r--r--ANDROID_3.4.5/arch/x86/kernel/dumpstack_64.c307
1 files changed, 0 insertions, 307 deletions
diff --git a/ANDROID_3.4.5/arch/x86/kernel/dumpstack_64.c b/ANDROID_3.4.5/arch/x86/kernel/dumpstack_64.c
deleted file mode 100644
index 17107bd6..00000000
--- a/ANDROID_3.4.5/arch/x86/kernel/dumpstack_64.c
+++ /dev/null
@@ -1,307 +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/hardirq.h>
-#include <linux/kdebug.h>
-#include <linux/module.h>
-#include <linux/ptrace.h>
-#include <linux/kexec.h>
-#include <linux/sysfs.h>
-#include <linux/bug.h>
-#include <linux/nmi.h>
-
-#include <asm/stacktrace.h>
-
-
-#define N_EXCEPTION_STACKS_END \
- (N_EXCEPTION_STACKS + DEBUG_STKSZ/EXCEPTION_STKSZ - 2)
-
-static char x86_stack_ids[][8] = {
- [ DEBUG_STACK-1 ] = "#DB",
- [ NMI_STACK-1 ] = "NMI",
- [ DOUBLEFAULT_STACK-1 ] = "#DF",
- [ STACKFAULT_STACK-1 ] = "#SS",
- [ MCE_STACK-1 ] = "#MC",
-#if DEBUG_STKSZ > EXCEPTION_STKSZ
- [ N_EXCEPTION_STACKS ...
- N_EXCEPTION_STACKS_END ] = "#DB[?]"
-#endif
-};
-
-static unsigned long *in_exception_stack(unsigned cpu, unsigned long stack,
- unsigned *usedp, char **idp)
-{
- unsigned k;
-
- /*
- * Iterate over all exception stacks, and figure out whether
- * 'stack' is in one of them:
- */
- for (k = 0; k < N_EXCEPTION_STACKS; k++) {
- unsigned long end = per_cpu(orig_ist, cpu).ist[k];
- /*
- * Is 'stack' above this exception frame's end?
- * If yes then skip to the next frame.
- */
- if (stack >= end)
- continue;
- /*
- * Is 'stack' above this exception frame's start address?
- * If yes then we found the right frame.
- */
- if (stack >= end - EXCEPTION_STKSZ) {
- /*
- * Make sure we only iterate through an exception
- * stack once. If it comes up for the second time
- * then there's something wrong going on - just
- * break out and return NULL:
- */
- if (*usedp & (1U << k))
- break;
- *usedp |= 1U << k;
- *idp = x86_stack_ids[k];
- return (unsigned long *)end;
- }
- /*
- * If this is a debug stack, and if it has a larger size than
- * the usual exception stacks, then 'stack' might still
- * be within the lower portion of the debug stack:
- */
-#if DEBUG_STKSZ > EXCEPTION_STKSZ
- if (k == DEBUG_STACK - 1 && stack >= end - DEBUG_STKSZ) {
- unsigned j = N_EXCEPTION_STACKS - 1;
-
- /*
- * Black magic. A large debug stack is composed of
- * multiple exception stack entries, which we
- * iterate through now. Dont look:
- */
- do {
- ++j;
- end -= EXCEPTION_STKSZ;
- x86_stack_ids[j][4] = '1' +
- (j - N_EXCEPTION_STACKS);
- } while (stack < end - EXCEPTION_STKSZ);
- if (*usedp & (1U << j))
- break;
- *usedp |= 1U << j;
- *idp = x86_stack_ids[j];
- return (unsigned long *)end;
- }
-#endif
- }
- return NULL;
-}
-
-static inline int
-in_irq_stack(unsigned long *stack, unsigned long *irq_stack,
- unsigned long *irq_stack_end)
-{
- return (stack >= irq_stack && stack < irq_stack_end);
-}
-
-/*
- * x86-64 can have up to three kernel stacks:
- * process stack
- * interrupt stack
- * severe exception (double fault, nmi, stack fault, debug, mce) hardware stack
- */
-
-void dump_trace(struct task_struct *task, struct pt_regs *regs,
- unsigned long *stack, unsigned long bp,
- const struct stacktrace_ops *ops, void *data)
-{
- const unsigned cpu = get_cpu();
- unsigned long *irq_stack_end =
- (unsigned long *)per_cpu(irq_stack_ptr, cpu);
- unsigned used = 0;
- struct thread_info *tinfo;
- int graph = 0;
- unsigned long dummy;
-
- if (!task)
- task = current;
-
- if (!stack) {
- if (regs)
- stack = (unsigned long *)regs->sp;
- else if (task != current)
- stack = (unsigned long *)task->thread.sp;
- else
- stack = &dummy;
- }
-
- if (!bp)
- bp = stack_frame(task, regs);
- /*
- * Print function call entries in all stacks, starting at the
- * current stack address. If the stacks consist of nested
- * exceptions
- */
- tinfo = task_thread_info(task);
- for (;;) {
- char *id;
- unsigned long *estack_end;
- estack_end = in_exception_stack(cpu, (unsigned long)stack,
- &used, &id);
-
- if (estack_end) {
- if (ops->stack(data, id) < 0)
- break;
-
- bp = ops->walk_stack(tinfo, stack, bp, ops,
- data, estack_end, &graph);
- ops->stack(data, "<EOE>");
- /*
- * We link to the next stack via the
- * second-to-last pointer (index -2 to end) in the
- * exception stack:
- */
- stack = (unsigned long *) estack_end[-2];
- continue;
- }
- if (irq_stack_end) {
- unsigned long *irq_stack;
- irq_stack = irq_stack_end -
- (IRQ_STACK_SIZE - 64) / sizeof(*irq_stack);
-
- if (in_irq_stack(stack, irq_stack, irq_stack_end)) {
- if (ops->stack(data, "IRQ") < 0)
- break;
- bp = ops->walk_stack(tinfo, stack, bp,
- ops, data, irq_stack_end, &graph);
- /*
- * We link to the next stack (which would be
- * the process stack normally) the last
- * pointer (index -1 to end) in the IRQ stack:
- */
- stack = (unsigned long *) (irq_stack_end[-1]);
- irq_stack_end = NULL;
- ops->stack(data, "EOI");
- continue;
- }
- }
- break;
- }
-
- /*
- * This handles the process stack:
- */
- bp = ops->walk_stack(tinfo, stack, bp, ops, data, NULL, &graph);
- put_cpu();
-}
-EXPORT_SYMBOL(dump_trace);
-
-void
-show_stack_log_lvl(struct task_struct *task, struct pt_regs *regs,
- unsigned long *sp, unsigned long bp, char *log_lvl)
-{
- unsigned long *irq_stack_end;
- unsigned long *irq_stack;
- unsigned long *stack;
- int cpu;
- int i;
-
- preempt_disable();
- cpu = smp_processor_id();
-
- irq_stack_end = (unsigned long *)(per_cpu(irq_stack_ptr, cpu));
- irq_stack = (unsigned long *)(per_cpu(irq_stack_ptr, cpu) - IRQ_STACK_SIZE);
-
- /*
- * Debugging aid: "show_stack(NULL, NULL);" prints the
- * back trace for this cpu:
- */
- 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 (stack >= irq_stack && stack <= irq_stack_end) {
- if (stack == irq_stack_end) {
- stack = (unsigned long *) (irq_stack_end[-1]);
- printk(KERN_CONT " <EOI> ");
- }
- } else {
- if (((long) stack & (THREAD_SIZE-1)) == 0)
- break;
- }
- if (i && ((i % STACKSLOTS_PER_LINE) == 0))
- printk(KERN_CONT "\n");
- printk(KERN_CONT " %016lx", *stack++);
- touch_nmi_watchdog();
- }
- preempt_enable();
-
- printk(KERN_CONT "\n");
- show_trace_log_lvl(task, regs, sp, bp, log_lvl);
-}
-
-void show_registers(struct pt_regs *regs)
-{
- int i;
- unsigned long sp;
- const int cpu = smp_processor_id();
- struct task_struct *cur = current;
-
- sp = regs->sp;
- printk("CPU %d ", cpu);
- print_modules();
- __show_regs(regs, 1);
- printk("Process %s (pid: %d, threadinfo %p, task %p)\n",
- cur->comm, cur->pid, task_thread_info(cur), cur);
-
- /*
- * When in-kernel, we also print out the stack and code at the
- * time of the fault..
- */
- if (!user_mode(regs)) {
- unsigned int code_prologue = code_bytes * 43 / 64;
- unsigned int code_len = code_bytes;
- unsigned char c;
- u8 *ip;
-
- printk(KERN_DEFAULT "Stack:\n");
- show_stack_log_lvl(NULL, regs, (unsigned long *)sp,
- 0, KERN_DEFAULT);
-
- printk(KERN_DEFAULT "Code: ");
-
- ip = (u8 *)regs->ip - code_prologue;
- if (ip < (u8 *)PAGE_OFFSET || probe_kernel_address(ip, c)) {
- /* try starting at IP */
- 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(KERN_CONT " Bad RIP value.");
- break;
- }
- if (ip == (u8 *)regs->ip)
- printk(KERN_CONT "<%02x> ", c);
- else
- printk(KERN_CONT "%02x ", c);
- }
- }
- printk(KERN_CONT "\n");
-}
-
-int is_valid_bugaddr(unsigned long ip)
-{
- unsigned short ud2;
-
- if (__copy_from_user(&ud2, (const void __user *) ip, sizeof(ud2)))
- return 0;
-
- return ud2 == 0x0b0f;
-}