Enum kernel::syscall::Syscall

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pub enum Syscall {
    Yield {
        which: usize,
        param_a: usize,
        param_b: usize,
    },
    Subscribe {
        driver_number: usize,
        subdriver_number: usize,
        upcall_ptr: *mut (),
        appdata: usize,
    },
    Command {
        driver_number: usize,
        subdriver_number: usize,
        arg0: usize,
        arg1: usize,
    },
    ReadWriteAllow {
        driver_number: usize,
        subdriver_number: usize,
        allow_address: *mut u8,
        allow_size: usize,
    },
    UserspaceReadableAllow {
        driver_number: usize,
        subdriver_number: usize,
        allow_address: *mut u8,
        allow_size: usize,
    },
    ReadOnlyAllow {
        driver_number: usize,
        subdriver_number: usize,
        allow_address: *const u8,
        allow_size: usize,
    },
    Memop {
        operand: usize,
        arg0: usize,
    },
    Exit {
        which: usize,
        completion_code: usize,
    },
}
Expand description

Decoded system calls as defined in TRD104.

Variants§

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Yield

Structure representing an invocation of the SyscallClass::Yield system call class. which is the Yield identifier value and address is the no wait field.

Fields

§which: usize
§param_a: usize
§param_b: usize
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Subscribe

Structure representing an invocation of the Subscribe system call class.

Fields

§driver_number: usize

The driver identifier.

§subdriver_number: usize

The subscribe identifier.

§upcall_ptr: *mut ()

Upcall pointer to the upcall function.

§appdata: usize

Userspace application data.

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Command

Structure representing an invocation of the Command system call class.

Fields

§driver_number: usize

The driver identifier.

§subdriver_number: usize

The command identifier.

§arg0: usize

Value passed to the Command implementation.

§arg1: usize

Value passed to the Command implementation.

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ReadWriteAllow

Structure representing an invocation of the ReadWriteAllow system call class.

Fields

§driver_number: usize

The driver identifier.

§subdriver_number: usize

The buffer identifier.

§allow_address: *mut u8

The address where the buffer starts.

§allow_size: usize

The size of the buffer in bytes.

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UserspaceReadableAllow

Structure representing an invocation of the UserspaceReadableAllow system call class that allows shared kernel and app access.

Fields

§driver_number: usize

The driver identifier.

§subdriver_number: usize

The buffer identifier.

§allow_address: *mut u8

The address where the buffer starts.

§allow_size: usize

The size of the buffer in bytes.

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ReadOnlyAllow

Structure representing an invocation of the ReadOnlyAllow system call class.

Fields

§driver_number: usize

The driver identifier.

§subdriver_number: usize

The buffer identifier.

§allow_address: *const u8

The address where the buffer starts.

§allow_size: usize

The size of the buffer in bytes.

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Memop

Structure representing an invocation of the Memop system call class.

Fields

§operand: usize

The operation.

§arg0: usize

The operation argument.

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Exit

Structure representing an invocation of the Exit system call class.

Fields

§which: usize

The exit identifier.

§completion_code: usize

The completion code passed into the kernel.

Implementations§

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impl Syscall

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pub fn from_register_arguments( syscall_number: u8, r0: usize, r1: usize, r2: usize, r3: usize, ) -> Option<Syscall>

Helper function for converting raw values passed back from an application into a Syscall type in Tock, representing an typed version of a system call invocation. The method returns None if the values do not specify a valid system call.

Different architectures have different ABIs for a process and the kernel to exchange data. The 32-bit ABI for CortexM and RISCV microcontrollers is specified in TRD104.

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pub fn driver_number(&self) -> Option<usize>

Get the driver_number for the syscall classes that use driver numbers.

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pub fn subdriver_number(&self) -> Option<usize>

Get the subdriver_number for the syscall classes that use sub driver numbers.

Trait Implementations§

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impl Clone for Syscall

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fn clone(&self) -> Syscall

Returns a copy of the value. Read more
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fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source. Read more
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impl Debug for Syscall

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fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter. Read more
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impl PartialEq for Syscall

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fn eq(&self, other: &Syscall) -> bool

This method tests for self and other values to be equal, and is used by ==.
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fn ne(&self, other: &Rhs) -> bool

This method tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.
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impl Copy for Syscall

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impl StructuralPartialEq for Syscall

Auto Trait Implementations§

Blanket Implementations§

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impl<T> Any for T
where T: 'static + ?Sized,

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fn type_id(&self) -> TypeId

Gets the TypeId of self. Read more
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impl<T> Borrow<T> for T
where T: ?Sized,

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fn borrow(&self) -> &T

Immutably borrows from an owned value. Read more
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impl<T> BorrowMut<T> for T
where T: ?Sized,

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fn borrow_mut(&mut self) -> &mut T

Mutably borrows from an owned value. Read more
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impl<T> CloneToUninit for T
where T: Clone,

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default unsafe fn clone_to_uninit(&self, dst: *mut T)

🔬This is a nightly-only experimental API. (clone_to_uninit)
Performs copy-assignment from self to dst. Read more
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impl<T> CloneToUninit for T
where T: Copy,

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unsafe fn clone_to_uninit(&self, dst: *mut T)

🔬This is a nightly-only experimental API. (clone_to_uninit)
Performs copy-assignment from self to dst. Read more
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impl<T> From<T> for T

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fn from(t: T) -> T

Returns the argument unchanged.

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impl<T, U> Into<U> for T
where U: From<T>,

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fn into(self) -> U

Calls U::from(self).

That is, this conversion is whatever the implementation of From<T> for U chooses to do.

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impl<T, U> TryFrom<U> for T
where U: Into<T>,

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type Error = Infallible

The type returned in the event of a conversion error.
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fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>

Performs the conversion.
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impl<T, U> TryInto<U> for T
where U: TryFrom<T>,

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type Error = <U as TryFrom<T>>::Error

The type returned in the event of a conversion error.
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fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error>

Performs the conversion.