mirror of https://gitee.com/openkylin/linux.git
100 lines
2.7 KiB
C
100 lines
2.7 KiB
C
#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;
|
|
};
|
|
|
|
#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)
|
|
#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)
|
|
|
|
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)®s->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;
|
|
info->regs.xcs = __KERNEL_CS;
|
|
__get_user(info->regs.ebp, (long *)info->task->thread.esp);
|
|
info->regs.esp = info->task->thread.esp;
|
|
info->regs.xss = __KERNEL_DS;
|
|
info->regs.xds = __USER_DS;
|
|
info->regs.xes = __USER_DS;
|
|
}
|
|
|
|
extern asmlinkage int arch_unwind_init_running(struct unwind_frame_info *,
|
|
asmlinkage int (*callback)(struct unwind_frame_info *,
|
|
void *arg),
|
|
void *arg);
|
|
|
|
static inline int arch_unw_user_mode(const struct unwind_frame_info *info)
|
|
{
|
|
#if 0 /* This can only work when selector register and EFLAGS saves/restores
|
|
are properly annotated (and tracked in UNW_REGISTER_INFO). */
|
|
return user_mode_vm(&info->regs);
|
|
#else
|
|
return info->regs.eip < PAGE_OFFSET
|
|
|| (info->regs.eip >= __fix_to_virt(FIX_VDSO)
|
|
&& info->regs.eip < __fix_to_virt(FIX_VDSO) + PAGE_SIZE)
|
|
|| info->regs.esp < PAGE_OFFSET;
|
|
#endif
|
|
}
|
|
|
|
#else
|
|
|
|
#define UNW_PC(frame) ((void)(frame), 0)
|
|
#define UNW_SP(frame) ((void)(frame), 0)
|
|
|
|
static inline int arch_unw_user_mode(const void *info)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
#endif
|
|
|
|
#endif /* _ASM_I386_UNWIND_H */
|