SYSCALL(2) — SYSTEM CALLS

NAME

syscall − indirect system call

SYNOPSIS

#include <syscall.h>

syscall(number, arg, ...)

DESCRIPTION

syscall performs the system call whose assembly language interface has the specified number, and arguments arg .... Symbolic constants for system calls can be found in the header file <syscall.h>.

The register d0 value of the system call is returned.

DIAGNOSTICS

When the C-bit is set, syscall returns −1 and sets the external variable errno (see intro(2)).

BUGS

There is no way to simulate system calls such as pipe(2), which return values in register d1.