1 files changed, 114 insertions, 0 deletions
diff --git a/arch/x86/include/asm/stacktrace.h b/arch/x86/include/asm/stacktrace.h
new file mode 100644
index 000000000..3881b5333
--- /dev/null
+++ b/arch/x86/include/asm/stacktrace.h
@@ -0,0 +1,114 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
+ *  Copyright (C) 1991, 1992  Linus Torvalds
+ *  Copyright (C) 2000, 2001, 2002 Andi Kleen, SuSE Labs
+ */
+
+#ifndef _ASM_X86_STACKTRACE_H
+#define _ASM_X86_STACKTRACE_H
+
+#include <linux/uaccess.h>
+#include <linux/ptrace.h>
+
+#include <asm/cpu_entry_area.h>
+#include <asm/switch_to.h>
+
+enum stack_type {
+	STACK_TYPE_UNKNOWN,
+	STACK_TYPE_TASK,
+	STACK_TYPE_IRQ,
+	STACK_TYPE_SOFTIRQ,
+	STACK_TYPE_ENTRY,
+	STACK_TYPE_EXCEPTION,
+	STACK_TYPE_EXCEPTION_LAST = STACK_TYPE_EXCEPTION + N_EXCEPTION_STACKS-1,
+};
+
+struct stack_info {
+	enum stack_type type;
+	unsigned long *begin, *end, *next_sp;
+};
+
+bool in_task_stack(unsigned long *stack, struct task_struct *task,
+		   struct stack_info *info);
+
+bool in_entry_stack(unsigned long *stack, struct stack_info *info);
+
+int get_stack_info(unsigned long *stack, struct task_struct *task,
+		   struct stack_info *info, unsigned long *visit_mask);
+bool get_stack_info_noinstr(unsigned long *stack, struct task_struct *task,
+			    struct stack_info *info);
+
+static __always_inline
+bool get_stack_guard_info(unsigned long *stack, struct stack_info *info)
+{
+	/* make sure it's not in the stack proper */
+	if (get_stack_info_noinstr(stack, current, info))
+		return false;
+	/* but if it is in the page below it, we hit a guard */
+	return get_stack_info_noinstr((void *)stack + PAGE_SIZE, current, info);
+}
+
+const char *stack_type_name(enum stack_type type);
+
+static inline bool on_stack(struct stack_info *info, void *addr, size_t len)
+{
+	void *begin = info->begin;
+	void *end   = info->end;
+
+	return (info->type != STACK_TYPE_UNKNOWN &&
+		addr >= begin && addr < end &&
+		addr + len > begin && addr + len <= end);
+}
+
+#ifdef CONFIG_X86_32
+#define STACKSLOTS_PER_LINE 8
+#else
+#define STACKSLOTS_PER_LINE 4
+#endif
+
+#ifdef CONFIG_FRAME_POINTER
+static inline unsigned long *
+get_frame_pointer(struct task_struct *task, struct pt_regs *regs)
+{
+	if (regs)
+		return (unsigned long *)regs->bp;
+
+	if (task == current)
+		return __builtin_frame_address(0);
+
+	return &((struct inactive_task_frame *)task->thread.sp)->bp;
+}
+#else
+static inline unsigned long *
+get_frame_pointer(struct task_struct *task, struct pt_regs *regs)
+{
+	return NULL;
+}
+#endif /* CONFIG_FRAME_POINTER */
+
+static inline unsigned long *
+get_stack_pointer(struct task_struct *task, struct pt_regs *regs)
+{
+	if (regs)
+		return (unsigned long *)regs->sp;
+
+	if (task == current)
+		return __builtin_frame_address(0);
+
+	return (unsigned long *)task->thread.sp;
+}
+
+/* The form of the top of the frame on the stack */
+struct stack_frame {
+	struct stack_frame *next_frame;
+	unsigned long return_address;
+};
+
+struct stack_frame_ia32 {
+    u32 next_frame;
+    u32 return_address;
+};
+
+void show_opcodes(struct pt_regs *regs, const char *loglvl);
+void show_ip(struct pt_regs *regs, const char *loglvl);
+#endif /* _ASM_X86_STACKTRACE_H */