Upgrade to latest Rust nightly v1.75

applications/hull/src/builtin.rs

@@ -135,7 +135,7 @@ impl Shell {
         // TODO: Sort IDs.
         for (id, job) in self.jobs.lock().iter() {
             // TODO: Separate job parts if they are in different states.
-            let Some(state) = &job.parts.get(0).map(|part| &part.state) else {
+            let Some(state) = &job.parts.first().map(|part| &part.state) else {
                 continue;
             };
             let line = &job.string;

applications/loadc/src/lib.rs

@@ -71,7 +71,7 @@ fn rmain(matches: Matches) -> Result<c_int, String> {
         )
     ).map_err(|_| String::from("failed to get current task"))?;
 
-    let path = matches.free.get(0).ok_or_else(|| "Missing path to ELF executable".to_string())?;
+    let path = matches.free.first().ok_or_else(|| "Missing path to ELF executable".to_string())?;
     let file_ref = Path::new(path).get_file(&curr_wd)
         .ok_or_else(|| format!("Failed to access file at {path:?}"))?;
     let file = file_ref.lock();

applications/ping/src/lib.rs

@@ -67,7 +67,7 @@ pub fn main(args: Vec<String>) -> isize {
 }
 
 fn _main(matches: Matches) -> Result<(), &'static str> {
-    let remote = IpAddress::from_str(matches.free.get(0).ok_or("no arguments_provided")?)
+    let remote = IpAddress::from_str(matches.free.first().ok_or("no arguments_provided")?)
         .map_err(|_| "invalid argument")?;
 
     let interface = net::get_default_interface().ok_or("no network interfaces available")?;

applications/serial_echo/src/lib.rs

@@ -25,7 +25,7 @@ use serial_port::{SerialPort, SerialPortAddress, get_serial_port};
 
 
 pub fn main(args: Vec<String>) -> isize {
-    let serial_port_address = args.get(0)
+    let serial_port_address = args.first()
         .and_then(|s| SerialPortAddress::try_from(&**s).ok())
         .unwrap_or(SerialPortAddress::COM1);
 

applications/shell/src/lib.rs

@@ -792,7 +792,7 @@ impl Shell {
     /// Try to match the incomplete command against all internal commands. Returns a
     /// vector that contains all matching results.
     fn find_internal_cmd_match(&mut self, incomplete_cmd: &String) -> Result<Vec<String>, &'static str> {
-        let internal_cmds = vec!["fg", "bg", "jobs", "clear"];
+        let internal_cmds = ["fg", "bg", "jobs", "clear"];
         let mut match_cmds = Vec::new();
         for cmd in internal_cmds.iter() {
             if cmd.starts_with(incomplete_cmd) {

kernel/ata/Cargo.toml

@@ -6,7 +6,7 @@ version = "0.1.0"
 edition = "2018"
 
 [dependencies]
-bitflags = "1.1.0"
+bitflags = "2.4.1"
 log = "0.4.8"
 spin = "0.9.4"
 x86_64 = "0.14.8"

kernel/ata/src/lib.rs

@@ -41,6 +41,7 @@ const PCI_BAR_PORT_MASK: u16 = 0xFFFC;
 
 bitflags! {
 	/// The possible error values found in an ATA drive's error port.
+    #[derive(Clone, Copy, Debug, Eq, PartialEq)]
     pub struct AtaError: u8 {
 		const BAD_BLOCK              = 0x80;
 		const UNCORRECTABLE_DATA     = 0x40;
@@ -55,6 +56,7 @@ bitflags! {
 
 bitflags! {
 	/// The possible status values found in an ATA drive's status port.
+    #[derive(Clone, Copy, Debug, Eq, PartialEq)]
     pub struct AtaStatus: u8 {
 		/// When set, the drive's port values are still changing, so ports shouldn't be accessed. 
 		const BUSY                 = 0x80;
@@ -73,6 +75,7 @@ bitflags! {
 
 bitflags! {
 	/// The possible control values used in an ATA drive's status port.
+    #[derive(Clone, Copy, Debug, Eq, PartialEq)]
     struct AtaControl: u8 {
 		/// Set this to read back the High Order Byte of the last-written LBA48 value.
 		const HOB   = 0x80;

kernel/boot_info/Cargo.toml

@@ -6,7 +6,7 @@ description = "Abstraction over multiboot2 and UEFI boot information"
 edition = "2021"
 
 [dependencies]
-bitflags = "1.3"
+bitflags = "2.4.1"
 kernel_config = { path = "../kernel_config" }
 memory_structs = { path = "../memory_structs" }
 multiboot2 = { version = "0.14", optional = true }

kernel/frame_allocator/src/lib.rs

@@ -1196,13 +1196,13 @@ pub fn allocate_frames_deferred(
                             // because we are searching the general frames list, it doesn't matter if part of the chunk was found
                             // since we only create new reserved frames.
                             trace!("Only part of the requested allocation was found in the general frames list.");
-                            return Err(alloc_err).map_err(From::from);
+                            return Err(From::from(alloc_err));
                         }
-                        Err(_other) => return Err(alloc_err).map_err(From::from),
+                        Err(_other) => return Err(From::from(alloc_err)),
                     }
                 },
                 AllocationError::ContiguousChunkNotFound(f, numf) => (f, numf),
-                _ => return Err(alloc_err).map_err(From::from),
+                _ => return Err(From::from(alloc_err)),
             }
         };
 

kernel/framebuffer_compositor/src/lib.rs

@@ -29,7 +29,7 @@ extern crate shapes;
 
 use alloc::collections::BTreeMap;
 use alloc::vec::{Vec};
-use core::hash::{Hash, Hasher, BuildHasher};
+use core::hash::{Hash, BuildHasher};
 use hashbrown::hash_map::{DefaultHashBuilder};
 use compositor::{Compositor, FramebufferUpdates, CompositableRegion};
 use framebuffer::{Framebuffer, Pixel};
@@ -268,8 +268,5 @@ impl Compositor for FrameCompositor {
 
 /// Gets the hash of an item
 fn hash<T: Hash>(item: T) -> u64 {
-    let builder = DefaultHashBuilder::default();
-    let mut hasher = builder.build_hasher();
-    item.hash(&mut hasher);
-    hasher.finish()
+    DefaultHashBuilder::default().hash_one(&item)
 }

kernel/gdt/Cargo.toml

@@ -9,7 +9,7 @@ edition = "2021"
 spin = "0.9.4"
 x86_64 = "0.14.8"
 bit_field = "0.7.0"
-bitflags = "1.1.0"
+bitflags = "2.4.1"
 log = "0.4.8"
 
 [dependencies.atomic_linked_list]

kernel/iommu/Cargo.toml

@@ -9,7 +9,7 @@ log = "0.4.8"
 spin = "0.9.4"
 volatile = "0.2.7"
 zerocopy = "0.5.0"
-bitflags = "1.3.2"
+bitflags = "2.4.1"
 
 [dependencies.sync_irq]
 path = "../../libs/sync_irq"

kernel/iommu/src/regs.rs

@@ -183,6 +183,7 @@ bitflags! {
     ///
     /// The least significant bits `[22:0]` are `RsvdZ`,
     /// meaning that they are reserved for future usage and must be set to 0.
+    #[derive(Clone, Copy, Debug, Eq, PartialEq)]
     pub struct GlobalStatus: u32 {
         /// Compatibility Format Interrupt Status
         const CFIS  = 1 << 23;

kernel/logger/src/lib.rs

@@ -20,7 +20,7 @@ extern crate sync_irq;
 extern crate serial_port_basic;
 
 use log::{Record, Level, Metadata, Log};
-use core::{borrow::Borrow, fmt::{self, Write}, ops::Deref};
+use core::{fmt::{self, Write}, ops::Deref};
 use sync_irq::IrqSafeMutex;
 use serial_port_basic::SerialPort;
 use alloc::{sync::Arc, vec::Vec};
@@ -210,7 +210,7 @@ impl DummyLogger {
     fn write_fmt(&self, arguments: fmt::Arguments) -> fmt::Result {
         if let Some(logger) = &*LOGGER.lock() {
             for writer in logger.writers.iter() {
-                let _ = writer.deref().borrow().lock().write_fmt(arguments);
+                let _ = writer.deref().lock().write_fmt(arguments);
             }
         } else {
             let _ = EARLY_LOGGER.lock().write_fmt(arguments);

kernel/memory/Cargo.toml

@@ -7,7 +7,7 @@ edition = "2021"
 
 [dependencies]
 spin = "0.9.4"
-bitflags = "1.1.0"
+bitflags = "2.4.1"
 xmas-elf = { version = "0.6.2", git = "https://github.com/theseus-os/xmas-elf.git" }
 bit_field = "0.7.0"
 zerocopy = "0.5.0"

kernel/mod_mgmt/src/lib.rs

@@ -141,7 +141,7 @@ fn parse_bootloader_modules_into_files(
 
     // Closure to create the directory for a new namespace.
     let create_dir = |dir_name: &str| -> Result<NamespaceDir, &'static str> {
-        VFSDirectory::create(dir_name.to_string(), &namespaces_dir).map(|d| NamespaceDir(d))
+        VFSDirectory::create(dir_name.to_string(), &namespaces_dir).map(NamespaceDir)
     };
 
     let mut process_module = |name: &str, size, pages| -> Result<_, &'static str> {
@@ -1085,13 +1085,27 @@ impl CrateNamespace {
             return Err("not a relocatable elf file");
         }
 
-        // If a `.theseus_merged` section exists, then the object file's sections have been merged by a partial relinking step.
+        // If a `.theseus_merged` section exists (it should come before any .text section),
+        // then the object file's sections have been merged by a partial relinking step.
         // If so, then we can use a much faster version of loading/linking.
         const THESEUS_MERGED_SEC_NAME: &str = ".theseus_merged";
-        const THESEUS_MERGED_SEC_SHNDX: u16 = 1;
-        let sections_are_merged = elf_file.section_header(THESEUS_MERGED_SEC_SHNDX)
-            .map(|sec| sec.get_name(&elf_file) == Ok(THESEUS_MERGED_SEC_NAME))
-            .unwrap_or(false);
+        let sections_are_merged = {
+            let mut found = false;
+            for sec_name in elf_file
+                .section_iter()
+                .filter_map(|sec| sec.get_name(&elf_file).ok())
+            {
+                if sec_name == THESEUS_MERGED_SEC_NAME {
+                    found = true;
+                    break;
+                }
+                else if sec_name.starts_with(TEXT_SECTION_NAME) {
+                    found = false;
+                    break;
+                }
+            }
+            found
+        };
 
         // Allocate enough space to load the sections
         let section_pages = allocate_section_pages(&elf_file, kernel_mmi_ref)?;

kernel/net/src/lib.rs

@@ -63,7 +63,7 @@ pub fn get_interfaces() -> &'static Mutex<Vec<Arc<NetworkInterface>>> {
 
 /// Returns the first available interface.
 pub fn get_default_interface() -> Option<Arc<NetworkInterface>> {
-    NETWORK_INTERFACES.lock().get(0).cloned()
+    NETWORK_INTERFACES.lock().first().cloned()
 }
 
 /// Returns a port in the range reserved for private, dynamic, and ephemeral

kernel/panic_entry/src/lib.rs

@@ -6,6 +6,7 @@
 
 #![no_std]
 #![feature(alloc_error_handler)]
+#![allow(internal_features)]
 #![feature(lang_items)]
 #![feature(panic_info_message)]