Skip to content

Add helper macros to define syscall functions #56

New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

Sign up for GitHub

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

Open
wants to merge 1 commit into
base: main
Choose a base branch
from
Open

Add helper macros to define syscall functions #56

Changes from all commits
Commits
Show all changes
1 commit
Select commit
File filter

Filter by extension

Filter by extension
Conversations
Failed to load comments.
Loading
Jump to
Jump to file
Failed to load files.
Loading
Diff view
Diff view
82 changes: 68 additions & 14 deletions src/macros.rs
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -24,23 +24,23 @@
/// ```
#[macro_export]
macro_rules! syscall {
($nr:expr) => {
($nr:expr $(,)?) => {
$crate::syscall0($nr)
};

($nr:expr, $a1:expr) => {
($nr:expr, $a1:expr $(,)?) => {
$crate::syscall1($nr, $a1 as usize)
};

($nr:expr, $a1:expr, $a2:expr) => {
($nr:expr, $a1:expr, $a2:expr $(,)?) => {
$crate::syscall2($nr, $a1 as usize, $a2 as usize)
};

($nr:expr, $a1:expr, $a2:expr, $a3:expr) => {
($nr:expr, $a1:expr, $a2:expr, $a3:expr $(,)?) => {
$crate::syscall3($nr, $a1 as usize, $a2 as usize, $a3 as usize)
};

($nr:expr, $a1:expr, $a2:expr, $a3:expr, $a4:expr) => {
($nr:expr, $a1:expr, $a2:expr, $a3:expr, $a4:expr $(,)?) => {
$crate::syscall4(
$nr,
$a1 as usize,
Expand All @@ -50,7 +50,7 @@
)
};

($nr:expr, $a1:expr, $a2:expr, $a3:expr, $a4:expr, $a5:expr) => {
($nr:expr, $a1:expr, $a2:expr, $a3:expr, $a4:expr, $a5:expr $(,)?) => {
$crate::syscall5(
$nr,
$a1 as usize,
Expand All @@ -61,7 +61,7 @@
)
};

($nr:expr, $a1:expr, $a2:expr, $a3:expr, $a4:expr, $a5:expr, $a6:expr) => {
($nr:expr, $a1:expr, $a2:expr, $a3:expr, $a4:expr, $a5:expr, $a6:expr $(,)?) => {
$crate::syscall6(
$nr,
$a1 as usize,
Expand Down Expand Up @@ -90,19 +90,19 @@
/// ```
#[macro_export]
macro_rules! raw_syscall {
($nr:expr) => {
($nr:expr $(,)?) => {
$crate::raw::syscall0($nr as usize)
};

($nr:expr, $a1:expr) => {
($nr:expr, $a1:expr $(,)?) => {
$crate::raw::syscall1($nr as usize, $a1 as usize)
};

($nr:expr, $a1:expr, $a2:expr) => {
($nr:expr, $a1:expr, $a2:expr $(,)?) => {
$crate::raw::syscall2($nr as usize, $a1 as usize, $a2 as usize)
};

($nr:expr, $a1:expr, $a2:expr, $a3:expr) => {
($nr:expr, $a1:expr, $a2:expr, $a3:expr $(,)?) => {
$crate::raw::syscall3(
$nr as usize,
$a1 as usize,
Expand All @@ -111,7 +111,7 @@
)
};

($nr:expr, $a1:expr, $a2:expr, $a3:expr, $a4:expr) => {
($nr:expr, $a1:expr, $a2:expr, $a3:expr, $a4:expr $(,)?) => {
$crate::raw::syscall4(
$nr as usize,
$a1 as usize,
Expand All @@ -121,7 +121,7 @@
)
};

($nr:expr, $a1:expr, $a2:expr, $a3:expr, $a4:expr, $a5:expr) => {
($nr:expr, $a1:expr, $a2:expr, $a3:expr, $a4:expr, $a5:expr $(,)?) => {
$crate::raw::syscall5(
$nr as usize,
$a1 as usize,
Expand All @@ -132,7 +132,7 @@
)
};

($nr:expr, $a1:expr, $a2:expr, $a3:expr, $a4:expr, $a5:expr, $a6:expr) => {
($nr:expr, $a1:expr, $a2:expr, $a3:expr, $a4:expr, $a5:expr, $a6:expr $(,)?) => {
$crate::raw::syscall6(
$nr as usize,
$a1 as usize,
Expand All @@ -144,3 +144,57 @@
)
};
}

/// Defines a set of syscalls using a macro.
///
/// # Example
/// ```
/// use syscalls::{define_syscalls, Sysno};
///
/// define_syscalls! {
/// fn write(fd: RawFd, buf: *const u8, count: usize) -> usize;
/// pub fn exit(status: i32);

Check failure on line 156 in src/macros.rs

View workflow job for this annotation

GitHub Actions / Test Suite (x86_64-unknown-linux-gnu) 

cannot find type `RawFd` in this scope

Check failure on line 156 in src/macros.rs

View workflow job for this annotation

GitHub Actions / Test Suite (Nightly) (x86_64-unknown-linux-gnu) 

cannot find type `RawFd` in this scope
/// }
/// ```
///
#[macro_export]
macro_rules! define_syscalls {
(
$pub: vis
fn
$name: ident
($($iden: ident: $type: ty),*)
->
$ret: ty
) => {
#[inline]
$pub unsafe fn $name($($iden: $type),*) -> core::result::Result<$ret, $crate::Errno> {
unsafe { $crate::syscall!($crate::Sysno::$name, $($iden),*).map(|x| x as $ret) }
}
};
(
$pub: vis
fn
$name: ident
($($iden: ident: $type: ty),*)
) => {
#[inline]
$pub unsafe fn $name($($iden: $type),*) -> core::result::Result<(), $crate::Errno> {
unsafe { $crate::syscall!($crate::Sysno::$name, $($iden),*).map(|_| ()) }
}
};
(
$(
$pub: vis
fn
$name: ident
($($iden: ident: $type: ty $(,)?)*)
$(-> $ret: ty)?
;
)*
) => {
$(
$crate::define_syscalls!($pub fn $name($($iden: $type),*) $(-> $ret)?);
)*
}
}
Loading