JPH01106938U - - Google Patents
Info
- Publication number
- JPH01106938U JPH01106938U JP147088U JP147088U JPH01106938U JP H01106938 U JPH01106938 U JP H01106938U JP 147088 U JP147088 U JP 147088U JP 147088 U JP147088 U JP 147088U JP H01106938 U JPH01106938 U JP H01106938U
- Authority
- JP
- Japan
- Prior art keywords
- stackover
- stack
- stack pointer
- monitoring
- address
- Prior art date
- Legal status (The legal status 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 status listed.)
- Pending
Links
- 238000012544 monitoring process Methods 0.000 claims description 5
- 230000002265 prevention Effects 0.000 claims description 5
- 238000010586 diagram Methods 0.000 description 5
Landscapes
- Executing Machine-Instructions (AREA)
Description
第１図は、本考案のスタツクオーバ防止装置の
基本構成を例示するブロツク図、第２図は、本考
案の一実施例のスタツクオーバ防止装置の構成を
示すブロツク図、第３図は、同実施例のメモリ状
態を示す図、第４図は、同実施例のメモリ・状態
図及び実施例装置の構成を示すブロツク図である
。
Ｍ１……監視用アドレス記憶手段、Ｍ２……ス
タツクポインタ出力手段、Ｍ３……比較判定手段
、Ｍ４……回避手段、１１……コンパレータ、１
３……ＭＰＵ、１３ｂ……ＳＰ、１３ｃ……スタ
ツク監視用レジスタ、２１……Ｐ．Ｓ回路。
FIG. 1 is a block diagram illustrating the basic configuration of a stackover prevention device according to the present invention, FIG. 2 is a block diagram illustrating the configuration of a stackover prevention device according to an embodiment of the present invention, and FIG. 3 is a block diagram illustrating the configuration of a stackover prevention device according to an embodiment of the present invention. FIG. 4 is a block diagram showing the memory state diagram of the same embodiment and the configuration of the embodiment device. M1...Monitoring address storage means, M2...Stack pointer output means, M3...Comparison/judgment means, M4...Avoidance means, 11...Comparator, 1
3...MPU, 13b...SP, 13c...Stack monitoring register, 21...P. S circuit.
Claims (1)
スタツクオーバ防止装置であつて、 スタツク領域の限界値を示す所定のアドレスを
記憶する監視用アドレス記憶手段と、 スタツクの現在のアドレスを指定するスタツク
ポインタの値を出力するスタツクポインタ出力手
段と、 該スタツクポインタ出力手段が出力したスタツ
クポインタと上記監視用アドレス記憶手段が記憶
したアドレスとを比較判断してその結果を出力す
る比較判定手段と、 該比較結果に基づいてスタツクオーバの回避処
理を行う回避手段と、 を備えたスタツクオーバ防止装置。[Scope of Claim for Utility Model Registration] A stackover prevention device for monitoring a stack area used by a processor, comprising a monitoring address storage means for storing a predetermined address indicating a limit value of the stack area, and a current address of the stack. a stack pointer output means for outputting the value of a designated stack pointer; a stack pointer outputted by the stack pointer output means and an address stored in the monitoring address storage means; 1. A stackover prevention device, comprising: a comparison and determination means for performing stackover avoidance processing based on the comparison result; and an avoidance means for performing stackover avoidance processing based on the comparison result.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP147088U JPH01106938U (en) | 1988-01-09 | 1988-01-09 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP147088U JPH01106938U (en) | 1988-01-09 | 1988-01-09 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH01106938U true JPH01106938U (en) | 1989-07-19 |
Family
ID=31201384
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP147088U Pending JPH01106938U (en) | 1988-01-09 | 1988-01-09 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH01106938U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH05303491A (en) * | 1992-04-27 | 1993-11-16 | Nec Ic Microcomput Syst Ltd | Stack pointer monitoring device |
-
1988
- 1988-01-09 JP JP147088U patent/JPH01106938U/ja active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH05303491A (en) * | 1992-04-27 | 1993-11-16 | Nec Ic Microcomput Syst Ltd | Stack pointer monitoring device |
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