diff options
24 files changed, 718 insertions, 18 deletions
diff --git a/.nlsp-settings/rust_analyzer.json b/.nlsp-settings/rust_analyzer.json new file mode 100644 index 00000000000..eddf84afb2a --- /dev/null +++ b/.nlsp-settings/rust_analyzer.json @@ -0,0 +1,3 @@ +{ + "rust-analyzer.cargo.target": "x86_64-unknown-uefi" +} diff --git a/Cargo.lock b/Cargo.lock index d9aaedb8544..f84387f30be 100644 --- a/Cargo.lock +++ b/Cargo.lock @@ -3007,6 +3007,27 @@ dependencies = [ ] [[package]] +name = "r-efi" +version = "4.1.0" +source = "registry+https://github.com/rust-lang/crates.io-index" +checksum = "9e7345c622833c6745e7b027a28aa95618813dc1f3c3de396206410267dce6f3" +dependencies = [ + "compiler_builtins", + "rustc-std-workspace-core", +] + +[[package]] +name = "r-efi-alloc" +version = "1.0.0" +source = "registry+https://github.com/rust-lang/crates.io-index" +checksum = "31d6f09fe2b6ad044bc3d2c34ce4979796581afd2f1ebc185837e02421e02fd7" +dependencies = [ + "compiler_builtins", + "r-efi", + "rustc-std-workspace-core", +] + +[[package]] name = "rand" version = "0.8.5" source = "registry+https://github.com/rust-lang/crates.io-index" @@ -5012,6 +5033,8 @@ dependencies = [ "panic_abort", "panic_unwind", "profiler_builtins", + "r-efi", + "r-efi-alloc", "rand", "rand_xorshift", "rustc-demangle", diff --git a/compiler/rustc_codegen_ssa/src/base.rs b/compiler/rustc_codegen_ssa/src/base.rs index cd19885faa0..4753f125540 100644 --- a/compiler/rustc_codegen_ssa/src/base.rs +++ b/compiler/rustc_codegen_ssa/src/base.rs @@ -420,9 +420,11 @@ pub fn maybe_create_entry_wrapper<'a, 'tcx, Bx: BuilderMethods<'a, 'tcx>>( rust_main_def_id: DefId, entry_type: EntryFnType, ) -> Bx::Function { - // The entry function is either `int main(void)` or `int main(int argc, char **argv)`, - // depending on whether the target needs `argc` and `argv` to be passed in. - let llfty = if cx.sess().target.main_needs_argc_argv { + // The entry function is either `int main(void)` or `int main(int argc, char **argv)`, or + // `Status efi_main(Handle hd, SystemTable *st)` depending on the target. + let llfty = if cx.sess().target.os.contains("uefi") { + cx.type_func(&[cx.type_ptr(), cx.type_ptr()], cx.type_isize()) + } else if cx.sess().target.main_needs_argc_argv { cx.type_func(&[cx.type_int(), cx.type_ptr()], cx.type_int()) } else { cx.type_func(&[], cx.type_int()) @@ -485,8 +487,12 @@ pub fn maybe_create_entry_wrapper<'a, 'tcx, Bx: BuilderMethods<'a, 'tcx>>( }; let result = bx.call(start_ty, None, None, start_fn, &args, None); - let cast = bx.intcast(result, cx.type_int(), true); - bx.ret(cast); + if cx.sess().target.os.contains("uefi") { + bx.ret(result); + } else { + let cast = bx.intcast(result, cx.type_int(), true); + bx.ret(cast); + } llfn } @@ -497,7 +503,18 @@ fn get_argc_argv<'a, 'tcx, Bx: BuilderMethods<'a, 'tcx>>( cx: &'a Bx::CodegenCx, bx: &mut Bx, ) -> (Bx::Value, Bx::Value) { - if cx.sess().target.main_needs_argc_argv { + if cx.sess().target.os.contains("uefi") { + // Params for UEFI + let param_handle = bx.get_param(0); + let param_system_table = bx.get_param(1); + let arg_argc = bx.const_int(cx.type_isize(), 2); + let arg_argv = bx.alloca(cx.type_array(cx.type_i8p(), 2), Align::ONE); + bx.store(param_handle, arg_argv, Align::ONE); + let arg_argv_el1 = + bx.gep(cx.type_ptr_to(cx.type_i8()), arg_argv, &[bx.const_int(cx.type_int(), 1)]); + bx.store(param_system_table, arg_argv_el1, Align::ONE); + (arg_argc, arg_argv) + } else if cx.sess().target.main_needs_argc_argv { // Params from native `main()` used as args for rust start function let param_argc = bx.get_param(0); let param_argv = bx.get_param(1); @@ -549,7 +566,11 @@ pub fn allocator_kind_for_codegen(tcx: TyCtxt<'_>) -> Option<AllocatorKind> { use rustc_middle::middle::dependency_format::Linkage; list.iter().any(|&linkage| linkage == Linkage::Dynamic) }); - if any_dynamic_crate { None } else { tcx.allocator_kind(()) } + if any_dynamic_crate { + None + } else { + tcx.allocator_kind(()) + } } pub fn codegen_crate<B: ExtraBackendMethods>( diff --git a/compiler/rustc_target/src/spec/uefi_msvc_base.rs b/compiler/rustc_target/src/spec/uefi_msvc_base.rs index 8968d3c8fc1..a50a55ad7e0 100644 --- a/compiler/rustc_target/src/spec/uefi_msvc_base.rs +++ b/compiler/rustc_target/src/spec/uefi_msvc_base.rs @@ -46,6 +46,7 @@ pub fn opts() -> TargetOptions { stack_probes: StackProbeType::Call, singlethread: true, linker: Some("rust-lld".into()), + entry_name: "efi_main".into(), ..base } } diff --git a/compiler/rustc_target/src/spec/x86_64_unknown_uefi.rs b/compiler/rustc_target/src/spec/x86_64_unknown_uefi.rs index 67664a74710..41ba768068a 100644 --- a/compiler/rustc_target/src/spec/x86_64_unknown_uefi.rs +++ b/compiler/rustc_target/src/spec/x86_64_unknown_uefi.rs @@ -5,13 +5,14 @@ // The win64 ABI is used. It differs from the sysv64 ABI, so we must use a windows target with // LLVM. "x86_64-unknown-windows" is used to get the minimal subset of windows-specific features. -use crate::spec::Target; +use crate::{abi::call::Conv, spec::Target}; pub fn target() -> Target { let mut base = super::uefi_msvc_base::opts(); base.cpu = "x86-64".into(); base.plt_by_default = false; base.max_atomic_width = Some(64); + base.entry_abi = Conv::X86_64Win64; // We disable MMX and SSE for now, even though UEFI allows using them. Problem is, you have to // enable these CPU features explicitly before their first use, otherwise their instructions diff --git a/library/panic_abort/src/lib.rs b/library/panic_abort/src/lib.rs index d675696f13f..bc0d7287be5 100644 --- a/library/panic_abort/src/lib.rs +++ b/library/panic_abort/src/lib.rs @@ -45,6 +45,7 @@ pub unsafe fn __rust_start_panic(_payload: &mut dyn PanicPayload) -> u32 { } else if #[cfg(any(target_os = "hermit", all(target_vendor = "fortanix", target_env = "sgx"), target_os = "xous" + target_os = "uefi", ))] { unsafe fn abort() -> ! { // call std::sys::abort_internal diff --git a/library/std/Cargo.toml b/library/std/Cargo.toml index e8f642586cd..1908dfaa33d 100644 --- a/library/std/Cargo.toml +++ b/library/std/Cargo.toml @@ -48,6 +48,10 @@ hermit-abi = { version = "0.3.2", features = ['rustc-dep-of-std'], public = true [target.'cfg(target_os = "wasi")'.dependencies] wasi = { version = "0.11.0", features = ['rustc-dep-of-std'], default-features = false } +[target.'cfg(target_os = "uefi")'.dependencies] +r-efi = { version = "4.1.0", features = ['rustc-dep-of-std', 'efiapi']} +r-efi-alloc = { version = "1.0.0", features = ['rustc-dep-of-std']} + [features] backtrace = [ "gimli-symbolize", diff --git a/library/std/build.rs b/library/std/build.rs index e5509504b84..1c32b425650 100644 --- a/library/std/build.rs +++ b/library/std/build.rs @@ -39,6 +39,7 @@ fn main() { || target.contains("nto") || target.contains("xous") || target.contains("hurd") + || target.contains("uefi") // See src/bootstrap/synthetic_targets.rs || env::var("RUSTC_BOOTSTRAP_SYNTHETIC_TARGET").is_ok() { @@ -51,7 +52,7 @@ fn main() { // - mipsel-sony-psp // - nvptx64-nvidia-cuda // - arch=avr - // - uefi (x86_64-unknown-uefi, i686-unknown-uefi) + // - tvos (aarch64-apple-tvos, x86_64-apple-tvos) // - JSON targets // - Any new targets that have not been explicitly added above. println!("cargo:rustc-cfg=feature=\"restricted-std\""); diff --git a/library/std/src/lib.rs b/library/std/src/lib.rs index 5e3249655b8..b572347019c 100644 --- a/library/std/src/lib.rs +++ b/library/std/src/lib.rs @@ -263,7 +263,6 @@ #![cfg_attr(target_os = "xous", feature(slice_ptr_len))] // // Language features: -// tidy-alphabetical-start #![feature(alloc_error_handler)] #![feature(allocator_internals)] #![feature(allow_internal_unsafe)] diff --git a/library/std/src/os/mod.rs b/library/std/src/os/mod.rs index 24d16e64c86..11ad21515fd 100644 --- a/library/std/src/os/mod.rs +++ b/library/std/src/os/mod.rs @@ -142,6 +142,8 @@ pub mod solid; #[cfg(target_os = "tvos")] #[path = "ios/mod.rs"] pub(crate) mod tvos; +#[cfg(target_os = "uefi")] +pub mod uefi; #[cfg(target_os = "vita")] pub mod vita; #[cfg(target_os = "vxworks")] diff --git a/library/std/src/os/uefi/env.rs b/library/std/src/os/uefi/env.rs new file mode 100644 index 00000000000..479ff5f6975 --- /dev/null +++ b/library/std/src/os/uefi/env.rs @@ -0,0 +1,54 @@ +//! UEFI-specific extensions to the primitives in `std::env` module + +use crate::ffi::c_void; +use crate::ptr::NonNull; +use crate::sync::atomic::{AtomicPtr, Ordering}; +use crate::sync::OnceLock; + +// Position 0 = SystemTable +// Position 1 = ImageHandle +static GLOBALS: OnceLock<(AtomicPtr<c_void>, AtomicPtr<c_void>)> = OnceLock::new(); + +/// Initializes the global System Table and Image Handle pointers. +/// +/// The standard library requires access to the UEFI System Table and the Application Image Handle +/// to operate. Those are provided to UEFI Applications via their application entry point. By +/// calling `init_globals()`, those pointers are retained by the standard library for future use. +/// The pointers are never exposed to any entity outside of this application and it is guaranteed +/// that, once the application exited, these pointers are never dereferenced again. +/// +/// Callers are required to ensure the pointers are valid for the entire lifetime of this +/// application. In particular, UEFI Boot Services must not be exited while an application with the +/// standard library is loaded. +/// +/// This function must not be called more than once. +#[unstable(feature = "uefi_std", issue = "100499")] +pub unsafe fn init_globals(handle: NonNull<c_void>, system_table: NonNull<c_void>) { + GLOBALS.set((AtomicPtr::new(system_table.as_ptr()), AtomicPtr::new(handle.as_ptr()))).unwrap() +} + +/// Get the SystemTable Pointer. +/// Note: This function panics if the System Table and Image Handle is Not initialized +#[unstable(feature = "uefi_std", issue = "100499")] +pub fn system_table() -> NonNull<c_void> { + try_system_table().unwrap() +} + +/// Get the SystemHandle Pointer. +/// Note: This function panics if the System Table and Image Handle is Not initialized +#[unstable(feature = "uefi_std", issue = "100499")] +pub fn image_handle() -> NonNull<c_void> { + try_image_handle().unwrap() +} + +/// Get the SystemTable Pointer. +/// This function is mostly intended for places where panic is not an option +pub(crate) fn try_system_table() -> Option<NonNull<crate::ffi::c_void>> { + NonNull::new(GLOBALS.get()?.0.load(Ordering::Acquire)) +} + +/// Get the SystemHandle Pointer. +/// This function is mostly intended for places where panic is not an option +pub(crate) fn try_image_handle() -> Option<NonNull<crate::ffi::c_void>> { + NonNull::new(GLOBALS.get()?.1.load(Ordering::Acquire)) +} diff --git a/library/std/src/os/uefi/mod.rs b/library/std/src/os/uefi/mod.rs new file mode 100644 index 00000000000..fc0468f25fc --- /dev/null +++ b/library/std/src/os/uefi/mod.rs @@ -0,0 +1,7 @@ +//! Platform-specific extensions to `std` for UEFI. + +#![unstable(feature = "uefi_std", issue = "100499")] + +pub mod env; +#[path = "../windows/ffi.rs"] +pub mod ffi; diff --git a/library/std/src/sys/common/thread_local/mod.rs b/library/std/src/sys/common/thread_local/mod.rs index 975509bd412..8b2c839f837 100644 --- a/library/std/src/sys/common/thread_local/mod.rs +++ b/library/std/src/sys/common/thread_local/mod.rs @@ -6,7 +6,7 @@ // "static" is for single-threaded platforms where a global static is sufficient. cfg_if::cfg_if! { - if #[cfg(all(target_family = "wasm", not(target_feature = "atomics")))] { + if #[cfg(any(all(target_family = "wasm", not(target_feature = "atomics")), target_os = "uefi"))] { #[doc(hidden)] mod static_local; #[doc(hidden)] diff --git a/library/std/src/sys/mod.rs b/library/std/src/sys/mod.rs index 457eb782ccc..a03501e6a13 100644 --- a/library/std/src/sys/mod.rs +++ b/library/std/src/sys/mod.rs @@ -47,6 +47,9 @@ cfg_if::cfg_if! { } else if #[cfg(target_os = "xous")] { mod xous; pub use self::xous::*; + } else if #[cfg(target_os = "uefi")] { + mod uefi; + pub use self::uefi::*; } else if #[cfg(all(target_vendor = "fortanix", target_env = "sgx"))] { mod sgx; pub use self::sgx::*; diff --git a/library/std/src/sys/uefi/alloc.rs b/library/std/src/sys/uefi/alloc.rs new file mode 100644 index 00000000000..6a14ee76e92 --- /dev/null +++ b/library/std/src/sys/uefi/alloc.rs @@ -0,0 +1,32 @@ +//! Global Allocator for UEFI. +//! Uses [r-efi-alloc](https://crates.io/crates/r-efi-alloc) + +use crate::alloc::{handle_alloc_error, GlobalAlloc, Layout, System}; + +const MEMORY_TYPE: u32 = r_efi::efi::LOADER_DATA; + +#[stable(feature = "alloc_system_type", since = "1.28.0")] +unsafe impl GlobalAlloc for System { + unsafe fn alloc(&self, layout: Layout) -> *mut u8 { + let system_table = match crate::os::uefi::env::try_system_table() { + None => return crate::ptr::null_mut(), + Some(x) => x.as_ptr() as *mut _, + }; + + if layout.size() > 0 { + unsafe { r_efi_alloc::raw::alloc(system_table, layout, MEMORY_TYPE) } + } else { + layout.dangling().as_ptr() + } + } + + unsafe fn dealloc(&self, ptr: *mut u8, layout: Layout) { + let system_table = match crate::os::uefi::env::try_system_table() { + None => handle_alloc_error(layout), + Some(x) => x.as_ptr() as *mut _, + }; + if layout.size() > 0 { + unsafe { r_efi_alloc::raw::dealloc(system_table, ptr, layout) } + } + } +} diff --git a/library/std/src/sys/uefi/common.rs b/library/std/src/sys/uefi/common.rs new file mode 100644 index 00000000000..6316a74d367 --- /dev/null +++ b/library/std/src/sys/uefi/common.rs @@ -0,0 +1,269 @@ +//! Contains most of the shared UEFI specific stuff. Some of this might be moved to `std::os::uefi` +//! if needed but no point in adding extra public API when there is not Std support for UEFI in the +//! first place + +use r_efi::efi::Guid; + +use crate::io::{self, const_io_error}; +use crate::mem::MaybeUninit; +use crate::os::uefi; +use crate::ptr::NonNull; + +// Locate handles with a particular protocol GUID +/// Implemented using `EFI_BOOT_SERVICES.LocateHandles()` +pub(crate) fn locate_handles(mut guid: Guid) -> io::Result<Vec<NonNull<crate::ffi::c_void>>> { + fn inner( + guid: &mut Guid, + boot_services: NonNull<r_efi::efi::BootServices>, + buf_size: &mut usize, + buf: *mut r_efi::efi::Handle, + ) -> io::Result<()> { + let r = unsafe { + ((*boot_services.as_ptr()).locate_handle)( + r_efi::efi::BY_PROTOCOL, + guid, + crate::ptr::null_mut(), + buf_size, + buf, + ) + }; + + if r.is_error() { Err(status_to_io_error(r)) } else { Ok(()) } + } + + let boot_services = boot_services(); + let mut buf_len = 0usize; + + match inner(&mut guid, boot_services, &mut buf_len, crate::ptr::null_mut()) { + Ok(()) => unreachable!(), + Err(e) => match e.kind() { + io::ErrorKind::FileTooLarge => {} + _ => return Err(e), + }, + } + + // The returned buf_len is in bytes + let mut buf: Vec<r_efi::efi::Handle> = + Vec::with_capacity(buf_len / crate::mem::size_of::<r_efi::efi::Handle>()); + match inner(&mut guid, boot_services, &mut buf_len, buf.as_mut_ptr()) { + Ok(()) => { + // SAFETY: This is safe because the call will succeed only if buf_len >= required + // length. Also, on success, the `buf_len` is updated with the size of bufferv (in + // bytes) written + unsafe { buf.set_len(buf_len / crate::mem::size_of::<r_efi::efi::Handle>()) }; + Ok(buf.iter().filter_map(|x| NonNull::new(*x)).collect()) + } + Err(e) => Err(e), + } +} + +/// Open Protocol on a handle +/// Implemented using `EFI_BOOT_SERVICES.OpenProtocol()` +pub(crate) fn open_protocol<T>( + handle: NonNull<crate::ffi::c_void>, + mut protocol_guid: Guid, +) -> io::Result<NonNull<T>> { + let boot_services = boot_services(); + let system_handle = uefi::env::image_handle(); + let mut protocol: MaybeUninit<*mut T> = MaybeUninit::uninit(); + + let r = unsafe { + ((*boot_services.as_ptr()).open_protocol)( + handle.as_ptr(), + &mut protocol_guid, + protocol.as_mut_ptr().cast(), + system_handle.as_ptr(), + crate::ptr::null_mut(), + r_efi::system::OPEN_PROTOCOL_GET_PROTOCOL, + ) + }; + + if r.is_error() { + Err(status_to_io_error(r)) + } else { + NonNull::new(unsafe { protocol.assume_init() }) + .ok_or(const_io_error!(io::ErrorKind::Other, "null protocol")) + } +} + +pub(crate) fn status_to_io_error(s: r_efi::efi::Status) -> io::Error { + use io::ErrorKind; + use r_efi::efi::Status; + + // Keep the List in Alphabetical Order + // The Messages are taken from UEFI Specification Appendix D - Status Codes + match s { + Status::ABORTED => { + const_io_error!(ErrorKind::ConnectionAborted, "The operation was aborted.") + } + Status::ACCESS_DENIED => { + const_io_error!(ErrorKind::PermissionDenied, "Access was denied.") + } + Status::ALREADY_STARTED => { + const_io_error!(ErrorKind::Other, "The protocol has already been started.") + } + Status::BAD_BUFFER_SIZE => { + const_io_error!( + ErrorKind::InvalidData, + "The buffer was not the proper size for the request." + ) + } + Status::BUFFER_TOO_SMALL => { + const_io_error!( + ErrorKind::FileTooLarge, + "The buffer is not large enough to hold the requested data. The required buffer size is returned in the appropriate parameter when this error occurs." + ) + } + Status::COMPROMISED_DATA => { + const_io_error!( + ErrorKind::Other, + "The security status of the data is unknown or compromised and the data must be updated or replaced to restore a valid security status." + ) + } + Status::CONNECTION_FIN => { + const_io_error!( + ErrorKind::Other, + "The receiving operation fails because the communication peer has closed the connection and there is no more data in the receive buffer of the instance." + ) + } + Status::CONNECTION_REFUSED => { + const_io_error!( + ErrorKind::ConnectionRefused, + "The receiving or transmission operation fails because this connection is refused." + ) + } + Status::CONNECTION_RESET => { + const_io_error!( + ErrorKind::ConnectionReset, + "The connect fails because the connection is reset either by instance itself or the communication peer." + ) + } + Status::CRC_ERROR => const_io_error!(ErrorKind::Other, "A CRC error was detected."), + Status::DEVICE_ERROR => const_io_error!( + ErrorKind::Other, + "The physical device reported an error while attempting the operation." + ), + Status::END_OF_FILE => { + const_io_error!(ErrorKind::UnexpectedEof, "The end of the file was reached.") + } + Status::END_OF_MEDIA => { + const_io_error!(ErrorKind::Other, "Beginning or end of media was reached") + } + Status::HOST_UNREACHABLE => { + const_io_error!(ErrorKind::HostUnreachable, "The remote host is not reachable.") + } + Status::HTTP_ERROR => { + const_io_error!(ErrorKind::Other, "A HTTP error occurred during the network operation.") + } + Status::ICMP_ERROR => { + const_io_error!( + ErrorKind::Other, + "An ICMP error occurred during the network operation." + ) + } + Status::INCOMPATIBLE_VERSION => { + const_io_error!( + ErrorKind::Other, + "The function encountered an internal version that was incompatible with a version requested by the caller." + ) + } + Status::INVALID_LANGUAGE => { + const_io_error!(ErrorKind::InvalidData, "The language specified was invalid.") + } + Status::INVALID_PARAMETER => { + const_io_error!(ErrorKind::InvalidInput, "A parameter was incorrect.") + } + Status::IP_ADDRESS_CONFLICT => { + const_io_error!(ErrorKind::AddrInUse, "There is an address conflict address allocation") + } + Status::LOAD_ERROR => { + const_io_error!(ErrorKind::Other, "The image failed to load.") + } + Status::MEDIA_CHANGED => { + const_io_error!( + ErrorKind::Other, + "The medium in the device has changed since the last access." + ) + } + Status::NETWORK_UNREACHABLE => { + const_io_error!( + ErrorKind::NetworkUnreachable, + "The network containing the remote host is not reachable." + ) + } + Status::NO_MAPPING => { + const_io_error!(ErrorKind::Other, "A mapping to a device does not exist.") + } + Status::NO_MEDIA => { + const_io_error!( + ErrorKind::Other, + "The device does not contain any medium to perform the operation." + ) + } + Status::NO_RESPONSE => { + const_io_error!( + ErrorKind::HostUnreachable, + "The server was not found or did not respond to the request." + ) + } + Status::NOT_FOUND => const_io_error!(ErrorKind::NotFound, "The item was not found."), + Status::NOT_READY => { + const_io_error!(ErrorKind::ResourceBusy, "There is no data pending upon return.") + } + Status::NOT_STARTED => { + const_io_error!(ErrorKind::Other, "The protocol has not been started.") + } + Status::OUT_OF_RESOURCES => { + const_io_error!(ErrorKind::OutOfMemory, "A resource has run out.") + } + Status::PROTOCOL_ERROR => { + const_io_error!( + ErrorKind::Other, + "A protocol error occurred during the network operation." + ) + } + Status::PROTOCOL_UNREACHABLE => { + const_io_error!(ErrorKind::Other, "An ICMP protocol unreachable error is received.") + } + Status::SECURITY_VIOLATION => { + const_io_error!( + ErrorKind::PermissionDenied, + "The function was not performed due to a security violation." + ) + } + Status::TFTP_ERROR => { + const_io_error!(ErrorKind::Other, "A TFTP error occurred during the network operation.") + } + Status::TIMEOUT => const_io_error!(ErrorKind::TimedOut, "The timeout time expired."), + Status::UNSUPPORTED => { + const_io_error!(ErrorKind::Unsupported, "The operation is not supported.") + } + Status::VOLUME_FULL => { + const_io_error!(ErrorKind::StorageFull, "There is no more space on the file system.") + } + Status::VOLUME_CORRUPTED => { + const_io_error!( + ErrorKind::Other, + "An inconstancy was detected on the file system causing the operating to fail." + ) + } + Status::WRITE_PROTECTED => { + const_io_error!(ErrorKind::ReadOnlyFilesystem, "The device cannot be written to.") + } + _ => io::Error::new(ErrorKind::Uncategorized, format!("Status: {}", s.as_usize())), + } +} + +/// Get the BootServices Pointer. +pub(crate) fn boot_services() -> NonNull<r_efi::efi::BootServices> { + let system_table: NonNull<r_efi::efi::SystemTable> = uefi::env::system_table().cast(); + let boot_services = unsafe { (*system_table.as_ptr()).boot_services }; + NonNull::new(boot_services).unwrap() +} +/// Get the BootServices Pointer. +/// This function is mostly intended for places where panic is not an option +pub(crate) fn try_boot_services() -> Option<NonNull<r_efi::efi::BootServices>> { + let system_table: NonNull<r_efi::efi::SystemTable> = uefi::env::try_system_table()?.cast(); + let boot_services = unsafe { (*system_table.as_ptr()).boot_services }; + NonNull::new(boot_services) +} diff --git a/library/std/src/sys/uefi/env.rs b/library/std/src/sys/uefi/env.rs new file mode 100644 index 00000000000..c106d5fed3e --- /dev/null +++ b/library/std/src/sys/uefi/env.rs @@ -0,0 +1,9 @@ +pub mod os { + pub const FAMILY: &str = ""; + pub const OS: &str = "uefi"; + pub const DLL_PREFIX: &str = ""; + pub const DLL_SUFFIX: &str = ""; + pub const DLL_EXTENSION: &str = ""; + pub const EXE_SUFFIX: &str = ".efi"; + pub const EXE_EXTENSION: &str = "efi"; +} diff --git a/library/std/src/sys/uefi/mod.rs b/library/std/src/sys/uefi/mod.rs new file mode 100644 index 00000000000..193d4ecc16f --- /dev/null +++ b/library/std/src/sys/uefi/mod.rs @@ -0,0 +1,155 @@ +//! Platform-specific extensions to `std` for UEFI platforms. +//! +//! Provides access to platform-level information on UEFI platforms, and +//! exposes UEFI-specific functions that would otherwise be inappropriate as +//! part of the core `std` library. +//! +//! It exposes more ways to deal with platform-specific strings ([`OsStr`], +//! [`OsString`]), allows to set permissions more granularly, extract low-level +//! file descriptors from files and sockets, and has platform-specific helpers +//! for spawning processes. +//! +//! [`OsStr`]: crate::ffi::OsStr +//! [`OsString`]: crate::ffi::OsString + +#![deny(unsafe_op_in_unsafe_fn)] +pub mod alloc; +#[path = "../unsupported/args.rs"] +pub mod args; +#[path = "../unix/cmath.rs"] +pub mod cmath; +pub mod env; +#[path = "../unsupported/fs.rs"] +pub mod fs; +#[path = "../unsupported/io.rs"] +pub mod io; +#[path = "../unsupported/locks/mod.rs"] +pub mod locks; +#[path = "../unsupported/net.rs"] +pub mod net; +#[path = "../unsupported/once.rs"] +pub mod once; +#[path = "../unsupported/os.rs"] +pub mod os; +#[path = "../windows/os_str.rs"] +pub mod os_str; +pub mod path; +#[path = "../unsupported/pipe.rs"] +pub mod pipe; +#[path = "../unsupported/process.rs"] +pub mod process; +#[path = "../unsupported/stdio.rs"] +pub mod stdio; +#[path = "../unsupported/thread.rs"] +pub mod thread; +#[path = "../unsupported/thread_local_key.rs"] +pub mod thread_local_key; +#[path = "../unsupported/time.rs"] +pub mod time; + +pub(crate) mod common; + +#[cfg(test)] +mod tests; + +use crate::io as std_io; +use crate::os::uefi; +use crate::ptr::NonNull; + +pub mod memchr { + pub use core::slice::memchr::{memchr, memrchr}; +} + +// SAFETY: must be called only once during runtime initialization. +// SAFETY: argc must be 2. +// SAFETY: argv must be &[Handle, *mut SystemTable]. +pub unsafe fn init(argc: isize, argv: *const *const u8, _sigpipe: u8) { + assert_eq!(argc, 2); + let image_handle = unsafe { NonNull::new(*argv as *mut crate::ffi::c_void).unwrap() }; + let system_table = unsafe { NonNull::new(*argv.add(1) as *mut crate::ffi::c_void).unwrap() }; + unsafe { crate::os::uefi::env::init_globals(image_handle, system_table) }; +} + +// SAFETY: must be called only once during runtime cleanup. +// NOTE: this is not guaranteed to run, for example when the program aborts. +pub unsafe fn cleanup() {} + +#[inline] +pub const fn unsupported<T>() -> std_io::Result<T> { + Err(unsupported_err()) +} + +#[inline] +pub const fn unsupported_err() -> std_io::Error { + std_io::const_io_error!(std_io::ErrorKind::Unsupported, "operation not supported on UEFI",) +} + +pub fn decode_error_kind(code: i32) -> crate::io::ErrorKind { + use crate::io::ErrorKind; + use r_efi::efi::Status; + + if let Ok(code) = usize::try_from(code) { + common::status_to_io_error(Status::from_usize(code)).kind() + } else { + ErrorKind::Uncategorized + } +} + +pub fn abort_internal() -> ! { + if let (Some(boot_services), Some(handle)) = + (common::try_boot_services(), uefi::env::try_image_handle()) + { + let _ = unsafe { + ((*boot_services.as_ptr()).exit)( + handle.as_ptr(), + r_efi::efi::Status::ABORTED, + 0, + crate::ptr::null_mut(), + ) + }; + } + + // In case SystemTable and ImageHandle cannot be reached, use `core::intrinsics::abort` + core::intrinsics::abort(); +} + +// This function is needed by the panic runtime. The symbol is named in +// pre-link args for the target specification, so keep that in sync. +#[cfg(not(test))] +#[no_mangle] +pub extern "C" fn __rust_abort() { + abort_internal(); +} + +#[inline] +pub fn hashmap_random_keys() -> (u64, u64) { + get_random().unwrap() +} + +fn get_random() -> Option<(u64, u64)> { + use r_efi::protocols::rng; + + let mut buf = [0u8; 16]; + let handles = common::locate_handles(rng::PROTOCOL_GUID).ok()?; + for handle in handles { + if let Ok(protocol) = common::open_protocol::<rng::Protocol>(handle, rng::PROTOCOL_GUID) { + let r = unsafe { + ((*protocol.as_ptr()).get_rng)( + protocol.as_ptr(), + crate::ptr::null_mut(), + buf.len(), + buf.as_mut_ptr(), + ) + }; + if r.is_error() { + continue; + } else { + return Some(( + u64::from_le_bytes(buf[..8].try_into().ok()?), + u64::from_le_bytes(buf[8..].try_into().ok()?), + )); + } + } + } + None +} diff --git a/library/std/src/sys/uefi/path.rs b/library/std/src/sys/uefi/path.rs new file mode 100644 index 00000000000..106682eee56 --- /dev/null +++ b/library/std/src/sys/uefi/path.rs @@ -0,0 +1,25 @@ +use super::unsupported; +use crate::ffi::OsStr; +use crate::io; +use crate::path::{Path, PathBuf, Prefix}; + +pub const MAIN_SEP_STR: &str = "\\"; +pub const MAIN_SEP: char = '\\'; + +#[inline] +pub fn is_sep_byte(b: u8) -> bool { + b == b'\\' +} + +#[inline] +pub fn is_verbatim_sep(b: u8) -> bool { + b == b'\\' +} + +pub fn parse_prefix(_p: &OsStr) -> Option<Prefix<'_>> { + None +} + +pub(crate) fn absolute(_path: &Path) -> io::Result<PathBuf> { + unsupported() +} diff --git a/library/std/src/sys/uefi/tests.rs b/library/std/src/sys/uefi/tests.rs new file mode 100644 index 00000000000..8806eda3ac0 --- /dev/null +++ b/library/std/src/sys/uefi/tests.rs @@ -0,0 +1,21 @@ +use super::alloc::*; + +#[test] +fn align() { + // UEFI ABI specifies that allocation alignment minimum is always 8. So this can be + // statically verified. + assert_eq!(POOL_ALIGNMENT, 8); + + // Loop over allocation-request sizes from 0-256 and alignments from 1-128, and verify + // that in case of overalignment there is at least space for one additional pointer to + // store in the allocation. + for i in 0..256 { + for j in &[1, 2, 4, 8, 16, 32, 64, 128] { + if *j <= 8 { + assert_eq!(align_size(i, *j), i); + } else { + assert!(align_size(i, *j) > i + std::mem::size_of::<*mut ()>()); + } + } + } +} diff --git a/library/std/src/sys_common/mod.rs b/library/std/src/sys_common/mod.rs index f7d82175063..d65d68337d8 100644 --- a/library/std/src/sys_common/mod.rs +++ b/library/std/src/sys_common/mod.rs @@ -44,6 +44,8 @@ cfg_if::cfg_if! { cfg_if::cfg_if! { if #[cfg(any(target_os = "l4re", + target_os = "hermit", + target_os = "uefi", feature = "restricted-std", all(target_family = "wasm", not(target_os = "emscripten")), target_os = "xous", diff --git a/src/bootstrap/config.rs b/src/bootstrap/config.rs index 176ef8e92db..836328f94ef 100644 --- a/src/bootstrap/config.rs +++ b/src/bootstrap/config.rs @@ -532,11 +532,7 @@ pub struct Target { impl Target { pub fn from_triple(triple: &str) -> Self { let mut target: Self = Default::default(); - if triple.contains("-none") - || triple.contains("nvptx") - || triple.contains("switch") - || triple.contains("-uefi") - { + if triple.contains("-none") || triple.contains("nvptx") || triple.contains("switch") { target.no_std = true; } target diff --git a/src/doc/rustc/src/platform-support/unknown-uefi.md b/src/doc/rustc/src/platform-support/unknown-uefi.md index 03fa284620e..8d4d60e12fb 100644 --- a/src/doc/rustc/src/platform-support/unknown-uefi.md +++ b/src/doc/rustc/src/platform-support/unknown-uefi.md @@ -19,8 +19,8 @@ Available targets: ## Requirements All UEFI targets can be used as `no-std` environments via cross-compilation. -Support for `std` is missing, but actively worked on. `alloc` is supported if -an allocator is provided by the user. No host tools are supported. +Support for `std` is present, but incomplete and extreamly new. `alloc` is supported if +an allocator is provided by the user or if using std. No host tools are supported. The UEFI environment resembles the environment for Microsoft Windows, with some minor differences. Therefore, cross-compiling for UEFI works with the same @@ -230,3 +230,71 @@ pub extern "C" fn main(_h: efi::Handle, st: *mut efi::SystemTable) -> efi::Statu efi::Status::SUCCESS } ``` + +## Rust std for UEFI +This section contains information on how to use std on UEFI. + +### Build std +The building std part is pretty much the same as the official [docs](https://rustc-dev-guide.rust-lang.org/getting-started.html). +The linker that should be used is `rust-lld`. Here is a sample `config.toml`: +```toml +[llvm] +download-ci-llvm = false +[rust] +lld = true +[target.x86_64-unknown-uefi] +linker = "rust-lld" +``` +Then just build using `x.py`: +```sh +./x.py build --target x86_64-unknown-uefi +``` + +### Std Requirements +The current std has a few basic requirements to function: +1. Memory Allocation Services (`EFI_BOOT_SERVICES.AllocatePool()` and + `EFI_BOOT_SERVICES.FreePool()`) are available. +If the above requirement is satisfied, the Rust code will reach `main`. +Now we will discuss what the different modules of std use in UEFI. + +### Implemented features +#### alloc +- Implemented using `EFI_BOOT_SERVICES.AllocatePool()` and `EFI_BOOT_SERVICES.FreePool()`. +- Passes all the tests. +- Some Quirks: + - Currently uses `EfiLoaderData` as the `EFI_ALLOCATE_POOL->PoolType`. +#### cmath +- Provided by compiler-builtins. +#### env +- Just some global consants. +#### locks +- Uses `unsupported/locks`. +- They should work for a platform without threads according to docs. +#### os_str +- Uses WTF-8 from windows. + +## Example: Hello World With std +The following code is a valid UEFI application showing stdio in UEFI. It also +uses `alloc` type `OsString` and `Vec`. + +This example can be compiled as binary crate via `cargo` using the toolchain +compiled from the above source (named custom): + +```sh +cargo +custom build --target x86_64-unknown-uefi +``` + +```rust,ignore (platform-specific) +use r_efi::efi; +use std::os::uefi::ffi::OsStrExt; +use std::{ffi::OsString, panic}; + +pub fn main() { + let st = std::os::uefi::env::system_table().as_ptr() as *mut efi::SystemTable; + let mut s: Vec<u16> = OsString::from("Hello World!\n").encode_wide().collect(); + s.push(0); + let r = + unsafe { ((*(*st).con_out).output_string)((*st).con_out, s.as_ptr() as *mut efi::Char16) }; + assert!(!r.is_error()) +} +``` diff --git a/src/tools/tidy/src/deps.rs b/src/tools/tidy/src/deps.rs index 843ffe2c4c3..daa9cb8d22e 100644 --- a/src/tools/tidy/src/deps.rs +++ b/src/tools/tidy/src/deps.rs @@ -18,6 +18,7 @@ const LICENSES: &[&str] = &[ "Apache-2.0/MIT", "ISC", "MIT / Apache-2.0", + "MIT OR Apache-2.0 OR LGPL-2.1-or-later", // r-efi, r-efi-alloc "MIT OR Apache-2.0 OR Zlib", // tinyvec_macros "MIT OR Apache-2.0", "MIT OR Zlib OR Apache-2.0", // miniz_oxide @@ -217,6 +218,8 @@ const PERMITTED_RUSTC_DEPENDENCIES: &[&str] = &[ "pulldown-cmark", "punycode", "quote", + "r-efi", + "r-efi-alloc", "rand", "rand_chacha", "rand_core", |