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rust: introduce a c_str macro

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This allows CStr constants to be defined easily on Rust 1.63.0, while
checking that there are no embedded NULs.  c"" literals were only
stabilized in Rust 1.77.0.

Reviewed-by: Zhao Liu <zhao1.liu@intel.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
This commit is contained in:
Paolo Bonzini 2024-10-25 08:23:53 +02:00
parent 9f7d4520d6
commit 718e255f0a
8 changed files with 78 additions and 19 deletions
Download patch file Download diff file Expand all files Collapse all files

5
rust/hw/char/pl011/src/device.rs
View file

@ -10,6 +10,7 @@ use std::{
use qemu_api::{
bindings::{self, *},
c_str,
definitions::ObjectImpl,
};
@ -135,7 +136,7 @@ impl PL011State {
/// location/instance. All its fields are expected to hold unitialized
/// values with the sole exception of `parent_obj`.
unsafe fn init(&mut self) {
const CLK_NAME: &CStr = c"clk";
const CLK_NAME: &CStr = c_str!("clk");
let dev = addr_of_mut!(*self).cast::<DeviceState>();
// SAFETY:
@ -598,7 +599,7 @@ pub unsafe extern "C" fn pl011_create(
let dev: *mut DeviceState = qdev_new(PL011State::TYPE_INFO.name);
let sysbus: *mut SysBusDevice = dev.cast::<SysBusDevice>();
qdev_prop_set_chr(dev, c"chardev".as_ptr(), chr);
qdev_prop_set_chr(dev, c_str!("chardev").as_ptr(), chr);
sysbus_realize_and_unref(sysbus, addr_of!(error_fatal) as *mut *mut Error);
sysbus_mmio_map(sysbus, 0, addr);
sysbus_connect_irq(sysbus, 0, irq);

18
rust/hw/char/pl011/src/device_class.rs
View file

@ -2,14 +2,12 @@
// Author(s): Manos Pitsidianakis <manos.pitsidianakis@linaro.org>
// SPDX-License-Identifier: GPL-2.0-or-later
use core::{
ffi::{c_int, c_void},
ptr::NonNull,
};
use core::ptr::NonNull;
use std::os::raw::{c_int, c_void};
use qemu_api::{
bindings::*, vmstate_clock, vmstate_fields, vmstate_int32, vmstate_subsections, vmstate_uint32,
vmstate_uint32_array, vmstate_unused, zeroable::Zeroable,
bindings::*, c_str, vmstate_clock, vmstate_fields, vmstate_int32, vmstate_subsections,
vmstate_uint32, vmstate_uint32_array, vmstate_unused, zeroable::Zeroable,
};
use crate::device::{PL011State, PL011_FIFO_DEPTH};
@ -24,7 +22,7 @@ extern "C" fn pl011_clock_needed(opaque: *mut c_void) -> bool {
/// Migration subsection for [`PL011State`] clock.
pub static VMSTATE_PL011_CLOCK: VMStateDescription = VMStateDescription {
name: c"pl011/clock".as_ptr(),
name: c_str!("pl011/clock").as_ptr(),
version_id: 1,
minimum_version_id: 1,
needed: Some(pl011_clock_needed),
@ -48,7 +46,7 @@ extern "C" fn pl011_post_load(opaque: *mut c_void, version_id: c_int) -> c_int {
}
pub static VMSTATE_PL011: VMStateDescription = VMStateDescription {
name: c"pl011".as_ptr(),
name: c_str!("pl011").as_ptr(),
version_id: 2,
minimum_version_id: 2,
post_load: Some(pl011_post_load),
@ -79,14 +77,14 @@ pub static VMSTATE_PL011: VMStateDescription = VMStateDescription {
qemu_api::declare_properties! {
PL011_PROPERTIES,
qemu_api::define_property!(
c"chardev",
c_str!("chardev"),
PL011State,
char_backend,
unsafe { &qdev_prop_chr },
CharBackend
),
qemu_api::define_property!(
c"migrate-clk",
c_str!("migrate-clk"),
PL011State,
migrate_clock,
unsafe { &qdev_prop_bool },

6
rust/hw/char/pl011/src/lib.rs
View file

@ -42,12 +42,14 @@ extern crate bilge;
extern crate bilge_impl;
extern crate qemu_api;
use qemu_api::c_str;
pub mod device;
pub mod device_class;
pub mod memory_ops;
pub const TYPE_PL011: &::std::ffi::CStr = c"pl011";
pub const TYPE_PL011_LUMINARY: &::std::ffi::CStr = c"pl011_luminary";
pub const TYPE_PL011: &::std::ffi::CStr = c_str!("pl011");
pub const TYPE_PL011_LUMINARY: &::std::ffi::CStr = c_str!("pl011_luminary");
/// Offset of each register from the base memory address of the device.
///