Address OxFFFFFFFF Return to caller Trap to the kernel 5 Put code for read in register User space Increment SP 11 Call read 3 Push fd 2 Push &buffer Push nbytes Kernel space (Operating system) 10 Dispatch Sys call handler 9 Library procedure read User program calling read

CompTIA Linux+ Guide to Linux Certification (MindTap Course List)
4th Edition
ISBN:9781305107168
Author:Jason Eckert
Publisher:Jason Eckert
Chapter1: Introduction To Linux
Section: Chapter Questions
Problem 6RQ
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operatıng systems
The figure on the right shows the operation of the read system call in general (count-read(fd,buffer,nbytes)).
What does it
mean if the operating system sends a value of 200 to the library procedure at arrow 9?

Address
OxFFFFFFFF
Return to caller
Trap to the kernel
5 Put code for read in register
User space
Increment SP
11
Call read
3
Push fd
2
Push &buffer
Push nbytes
Kernel space
(Operating system)
10
Dispatch
Sys call
handler
9
Library
procedure
read
User program
calling read
Transcribed Image Text:Address OxFFFFFFFF Return to caller Trap to the kernel 5 Put code for read in register User space Increment SP 11 Call read 3 Push fd 2 Push &buffer Push nbytes Kernel space (Operating system) 10 Dispatch Sys call handler 9 Library procedure read User program calling read
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