JPS6474643A - Execution right transfer control system - Google Patents

Execution right transfer control system

Info

Publication number
JPS6474643A
JPS6474643A JP23276387A JP23276387A JPS6474643A JP S6474643 A JPS6474643 A JP S6474643A JP 23276387 A JP23276387 A JP 23276387A JP 23276387 A JP23276387 A JP 23276387A JP S6474643 A JPS6474643 A JP S6474643A
Authority
JP
Japan
Prior art keywords
kernel
command
execution right
file
execution
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
Application number
JP23276387A
Other languages
Japanese (ja)
Inventor
Tamotsu Mizuguchi
Tokuhiro Aritaka
Haruo Moritomo
Naoto Ito
Hiromi Hasegawa
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Fujitsu Ltd
Original Assignee
Fujitsu Ltd
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 Fujitsu Ltd filed Critical Fujitsu Ltd
Priority to JP23276387A priority Critical patent/JPS6474643A/en
Publication of JPS6474643A publication Critical patent/JPS6474643A/en
Pending legal-status Critical Current

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  • Storage Device Security (AREA)

Abstract

PURPOSE:To transfer execution right from a higher privileged level to a lower privileged level by artificially performing command CALL execution procedures by a stack contents setting means and performing execution right transfer procedures by a command IRET. CONSTITUTION:Application 7 uses a command CALL to request the read of a file, which is stored on a floppy 20, to a fundamental software OS kernel 10. The kernel 10 analyzes it to judge that file management 6 should read this file. The kernel 10 sets three parameters to a parameter delivery buffer 5 and transfers the execution right to management 6. Management 6 receives parameters from the buffer 5 and reads out data corresponding to a designated side of the designated file from the floppy 20 to a buffer memory 30 and returns the control to the kernel 10. A command IRET start part 2 in the kernel 10 issues a command to restart execution of application 7. Thus, the execution right is transferred from a higher privileged level to a lower privileged level.
JP23276387A 1987-09-17 1987-09-17 Execution right transfer control system Pending JPS6474643A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP23276387A JPS6474643A (en) 1987-09-17 1987-09-17 Execution right transfer control system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP23276387A JPS6474643A (en) 1987-09-17 1987-09-17 Execution right transfer control system

Publications (1)

Publication Number Publication Date
JPS6474643A true JPS6474643A (en) 1989-03-20

Family

ID=16944362

Family Applications (1)

Application Number Title Priority Date Filing Date
JP23276387A Pending JPS6474643A (en) 1987-09-17 1987-09-17 Execution right transfer control system

Country Status (1)

Country Link
JP (1) JPS6474643A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0316860U (en) * 1989-06-26 1991-02-20
JPH04284555A (en) * 1991-03-14 1992-10-09 Fujitsu Ltd Processor and processing method for executing outside ring transition
US5808520A (en) * 1995-03-22 1998-09-15 Nec Corporation Attenuating circuit using quarter-wave lines

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0316860U (en) * 1989-06-26 1991-02-20
JPH04284555A (en) * 1991-03-14 1992-10-09 Fujitsu Ltd Processor and processing method for executing outside ring transition
US5808520A (en) * 1995-03-22 1998-09-15 Nec Corporation Attenuating circuit using quarter-wave lines

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