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a question about operating system

a question about operating system# Unix - 噫吁兮，危乎高哉

w*j2010-03-25 07:03

1 楼

Hi, everyone. I just started learning operating system and have a lot of
confusion.
a program written in c will invoke the system call in operating system.
but what about a operating system written in c? where does it find the
system call?

G*O2010-03-25 07:03

2 楼

你如果调用系统，就call了
不调用就不call了白
系统调用在库里面

【在 w*****j 的大作中提到】

: Hi, everyone. I just started learning operating system and have a lot of
: confusion.
: a program written in c will invoke the system call in operating system.
: but what about a operating system written in c? where does it find the
: system call?

L*n2010-03-25 07:03

3 楼

an operating system doesn't find system calls, it provides functions
that are invoked by system calls done through interrupts(old way)
or sysenter/syscall(recent approach)

【在 w*****j 的大作中提到】