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generated by cgit v1.2.2 (git 2.25.0) at 2025-09-13 08:41:19 -0400
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#ifndef _ASM_I386_UNWIND_H
#define _ASM_I386_UNWIND_H

/*
 * Copyright (C) 2002-2006 Novell, Inc.
 *	Jan Beulich <jbeulich@novell.com>
 * This code is released under version 2 of the GNU GPL.
 */

#ifdef CONFIG_STACK_UNWIND

#include <linux/sched.h>
#include <asm/fixmap.h>
#include <asm/ptrace.h>
#include <asm/uaccess.h>

struct unwind_frame_info
{
	struct pt_regs regs;
	struct task_struct *task;
	unsigned call_frame:1;
};

#define UNW_PC(frame)        (frame)->regs.eip
#define UNW_SP(frame)        (frame)->regs.esp
#ifdef CONFIG_FRAME_POINTER
#define UNW_FP(frame)        (frame)->regs.ebp
#define FRAME_RETADDR_OFFSET 4
#define FRAME_LINK_OFFSET    0
#define STACK_BOTTOM(tsk)    STACK_LIMIT((tsk)->thread.esp0)
#define STACK_TOP(tsk)       ((tsk)->thread.esp0)
#else
#define UNW_FP(frame) ((void)(frame), 0)
#endif
#define STACK_LIMIT(ptr)     (((ptr) - 1) & ~(THREAD_SIZE - 1))

#define UNW_REGISTER_INFO \
	PTREGS_INFO(eax), \
	PTREGS_INFO(ecx), \
	PTREGS_INFO(edx), \
	PTREGS_INFO(ebx), \
	PTREGS_INFO(esp), \
	PTREGS_INFO(ebp), \
	PTREGS_INFO(esi), \
	PTREGS_INFO(edi), \
	PTREGS_INFO(eip)

#define UNW_DEFAULT_RA(raItem, dataAlign) \
	((raItem).where == Memory && \
	 !((raItem).value * (dataAlign) + 4))

static inline void arch_unw_init_frame_info(struct unwind_frame_info *info,
                                            /*const*/ struct pt_regs *regs)
{
	if (user_mode_vm(regs))
		info->regs = *regs;
	else {
		memcpy(&info->regs, regs, offsetof(struct pt_regs, esp));
		info->regs.esp = (unsigned long)&regs->esp;
		info->regs.xss = __KERNEL_DS;
	}
}

static inline void arch_unw_init_blocked(struct unwind_frame_info *info)
{
	memset(&info->regs, 0, sizeof(info->regs));
	info->regs.eip = info->task->thread.eip;