WO2012165762A3 - Method of controlling virtual memory data access - Google Patents

Method of controlling virtual memory data access Download PDF

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Publication number
WO2012165762A3
WO2012165762A3 PCT/KR2012/003213 KR2012003213W WO2012165762A3 WO 2012165762 A3 WO2012165762 A3 WO 2012165762A3 KR 2012003213 W KR2012003213 W KR 2012003213W WO 2012165762 A3 WO2012165762 A3 WO 2012165762A3
Authority
WO
WIPO (PCT)
Prior art keywords
page table
virtual page
memory data
virtual
address information
Prior art date
Application number
PCT/KR2012/003213
Other languages
French (fr)
Korean (ko)
Other versions
WO2012165762A2 (en
Inventor
심형진
김찬호
이재혁
윤상진
Original Assignee
(주)잉카인터넷
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by (주)잉카인터넷 filed Critical (주)잉카인터넷
Publication of WO2012165762A2 publication Critical patent/WO2012165762A2/en
Publication of WO2012165762A3 publication Critical patent/WO2012165762A3/en

Links

Classifications

    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F12/00—Accessing, addressing or allocating within memory systems or architectures
    • G06F12/02—Addressing or allocation; Relocation
    • G06F12/08—Addressing or allocation; Relocation in hierarchically structured memory systems, e.g. virtual memory systems
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F12/00—Accessing, addressing or allocating within memory systems or architectures
    • G06F12/14—Protection against unauthorised use of memory or access to memory
    • G06F12/1416—Protection against unauthorised use of memory or access to memory by checking the object accessibility, e.g. type of access defined by the memory independently of subject rights
    • G06F12/145—Protection against unauthorised use of memory or access to memory by checking the object accessibility, e.g. type of access defined by the memory independently of subject rights the protection being virtual, e.g. for virtual blocks or segments before a translation mechanism

Landscapes

  • Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • General Engineering & Computer Science (AREA)
  • General Physics & Mathematics (AREA)
  • Computer Security & Cryptography (AREA)
  • Storage Device Security (AREA)
  • Memory System Of A Hierarchy Structure (AREA)

Abstract

The present invention relates to a method of controlling virtual memory data access, which prevents another process and thread except a game process from accessing virtual memory data of the game process and allows only a thread object in the game process to access the virtual memory data of the game process. The method of controlling virtual memory access according to the present invention includes: a first step of detecting, by a security process, whether a virtual page table of a protection target process is initialized; a second step of storing abnormal memory data in a first virtual page table that the security process accesses by using virtual page directory address information stored in a process object of the protection target process, storing normal data in an additional second virtual page table, and storing start address information on the second virtual page table, after the first step; and a third step of changing, by the security process, start address information on the first virtual page table stored in a CPU register into the start address information on the second virtual page table when a protection target thread in the protection target process becomes a thread-in, after the second step.
PCT/KR2012/003213 2011-05-31 2012-04-26 Method of controlling virtual memory data access WO2012165762A2 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
KR1020110051776A KR101252188B1 (en) 2011-05-31 2011-05-31 control method of accessing virtual memory data
KR10-2011-0051776 2011-05-31

Publications (2)

Publication Number Publication Date
WO2012165762A2 WO2012165762A2 (en) 2012-12-06
WO2012165762A3 true WO2012165762A3 (en) 2013-03-28

Family

ID=47260011

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/KR2012/003213 WO2012165762A2 (en) 2011-05-31 2012-04-26 Method of controlling virtual memory data access

Country Status (2)

Country Link
KR (1) KR101252188B1 (en)
WO (1) WO2012165762A2 (en)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100336717B1 (en) * 1999-12-21 2002-05-13 오길록 Address space management method of multi-threads for real-time systems
KR20090084881A (en) * 2006-12-21 2009-08-05 인터내셔널 비지네스 머신즈 코포레이션 A method and system to manage memory accesses from multithread programs on multiprocessor systems
KR100927975B1 (en) * 2007-08-29 2009-11-24 주식회사 안철수연구소 How data is protected in memory
JP2009282774A (en) * 2008-05-22 2009-12-03 Fujitsu Ltd Emulation program, emulation device, and emulation method

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100778901B1 (en) 2005-05-18 2007-11-22 김성엽 Sound capture protecting method for the window multimedia system
KR100645983B1 (en) 2005-08-31 2006-11-14 (주)와이즈로직 Module for detecting an illegal process and method thereof
KR100927974B1 (en) 2007-10-09 2009-11-24 주식회사 안철수연구소 Source code generation system of executable image and its method

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100336717B1 (en) * 1999-12-21 2002-05-13 오길록 Address space management method of multi-threads for real-time systems
KR20090084881A (en) * 2006-12-21 2009-08-05 인터내셔널 비지네스 머신즈 코포레이션 A method and system to manage memory accesses from multithread programs on multiprocessor systems
KR100927975B1 (en) * 2007-08-29 2009-11-24 주식회사 안철수연구소 How data is protected in memory
JP2009282774A (en) * 2008-05-22 2009-12-03 Fujitsu Ltd Emulation program, emulation device, and emulation method

Also Published As

Publication number Publication date
KR20120133220A (en) 2012-12-10
KR101252188B1 (en) 2013-04-05
WO2012165762A2 (en) 2012-12-06

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