HAndling Syscalls

Yves Rutschle y.rutschle@indigovision.com
Wed Jul 10 11:22:00 GMT 2002

On Wed, Jul 10, 2002 at 10:18:52AM -0700, savithri venkatachalapathy wrote:
> And I have some doubts about how compilers handle syscalls.

Usually system calls would not actually depend on the
compiler. They are rather implemented by the C library.
Hence, when your program calls printf(), that enters the
C library which eventually will perform a write system call.

(In fact, you may even have a system without an operating
system, in which case you wouldn't get any system call at
all: printf() would call into the library which would
eventually call some hardware-dependent function that would
send stuff to the UART directly.)

The details will depend on the library you use...


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