diff --git a/compiler/rustc_codegen_gcc/src/archive.rs b/compiler/rustc_codegen_gcc/src/archive.rs index 0cee05f1cea..82e98370b37 100644 --- a/compiler/rustc_codegen_gcc/src/archive.rs +++ b/compiler/rustc_codegen_gcc/src/archive.rs @@ -2,6 +2,7 @@ use rustc_codegen_ssa::back::archive::{ ArArchiveBuilder, ArchiveBuilder, ArchiveBuilderBuilder, DEFAULT_OBJECT_READER, + ImportLibraryItem, }; use rustc_session::Session; @@ -16,7 +17,7 @@ fn create_dll_import_lib( &self, _sess: &Session, _lib_name: &str, - _import_name_and_ordinal_vector: Vec<(String, Option)>, + _items: Vec, _output_path: &Path, ) { unimplemented!("creating dll imports is not yet supported"); diff --git a/compiler/rustc_codegen_llvm/src/callee.rs b/compiler/rustc_codegen_llvm/src/callee.rs index 949fd1bc124..db4e1bae942 100644 --- a/compiler/rustc_codegen_llvm/src/callee.rs +++ b/compiler/rustc_codegen_llvm/src/callee.rs @@ -49,6 +49,22 @@ pub(crate) fn get_fn<'ll, 'tcx>(cx: &CodegenCx<'ll, 'tcx>, instance: Instance<'t let llfn = if tcx.sess.target.arch == "x86" && let Some(dllimport) = crate::common::get_dllimport(tcx, instance_def_id, sym) { + // When calling functions in generated import libraries, MSVC needs + // the fully decorated name (as would have been in the declaring + // object file), but MinGW wants the name as exported (as would be + // in the def file) which may be missing decorations. + let mingw_gnu_toolchain = common::is_mingw_gnu_toolchain(&tcx.sess.target); + let llfn = cx.declare_fn( + &common::i686_decorated_name( + dllimport, + mingw_gnu_toolchain, + true, + !mingw_gnu_toolchain, + ), + fn_abi, + Some(instance), + ); + // Fix for https://github.com/rust-lang/rust/issues/104453 // On x86 Windows, LLVM uses 'L' as the prefix for any private // global symbols, so when we create an undecorated function symbol @@ -60,15 +76,6 @@ pub(crate) fn get_fn<'ll, 'tcx>(cx: &CodegenCx<'ll, 'tcx>, instance: Instance<'t // LLVM will prefix the name with `__imp_`. Ideally, we'd like the // existing logic below to set the Storage Class, but it has an // exemption for MinGW for backwards compatibility. - let llfn = cx.declare_fn( - &common::i686_decorated_name( - dllimport, - common::is_mingw_gnu_toolchain(&tcx.sess.target), - true, - ), - fn_abi, - Some(instance), - ); unsafe { llvm::LLVMSetDLLStorageClass(llfn, llvm::DLLStorageClass::DllImport); } diff --git a/compiler/rustc_codegen_llvm/src/consts.rs b/compiler/rustc_codegen_llvm/src/consts.rs index c3b1676f77e..dc86ef22e37 100644 --- a/compiler/rustc_codegen_llvm/src/consts.rs +++ b/compiler/rustc_codegen_llvm/src/consts.rs @@ -196,16 +196,10 @@ fn check_and_apply_linkage<'ll, 'tcx>( g2 } } else if cx.tcx.sess.target.arch == "x86" + && common::is_mingw_gnu_toolchain(&cx.tcx.sess.target) && let Some(dllimport) = crate::common::get_dllimport(cx.tcx, def_id, sym) { - cx.declare_global( - &common::i686_decorated_name( - dllimport, - common::is_mingw_gnu_toolchain(&cx.tcx.sess.target), - true, - ), - llty, - ) + cx.declare_global(&common::i686_decorated_name(dllimport, true, true, false), llty) } else { // Generate an external declaration. // FIXME(nagisa): investigate whether it can be changed into define_global diff --git a/compiler/rustc_codegen_ssa/src/back/archive.rs b/compiler/rustc_codegen_ssa/src/back/archive.rs index a665f5c9306..eb714853a4a 100644 --- a/compiler/rustc_codegen_ssa/src/back/archive.rs +++ b/compiler/rustc_codegen_ssa/src/back/archive.rs @@ -26,6 +26,35 @@ DlltoolFailImportLibrary, ErrorCallingDllTool, ErrorCreatingImportLibrary, ErrorWritingDEFFile, }; +/// An item to be included in an import library. +/// This is a slimmed down version of `COFFShortExport` from `ar-archive-writer`. +pub struct ImportLibraryItem { + /// The name to be exported. + pub name: String, + /// The ordinal to be exported, if any. + pub ordinal: Option, + /// The original, decorated name if `name` is not decorated. + pub symbol_name: Option, + /// True if this is a data export, false if it is a function export. + pub is_data: bool, +} + +impl From for COFFShortExport { + fn from(item: ImportLibraryItem) -> Self { + COFFShortExport { + name: item.name, + ext_name: None, + symbol_name: item.symbol_name, + alias_target: None, + ordinal: item.ordinal.unwrap_or(0), + noname: item.ordinal.is_some(), + data: item.is_data, + private: false, + constant: false, + } + } +} + pub trait ArchiveBuilderBuilder { fn new_archive_builder<'a>(&self, sess: &'a Session) -> Box; @@ -38,7 +67,7 @@ fn create_dll_import_lib( &self, sess: &Session, lib_name: &str, - import_name_and_ordinal_vector: Vec<(String, Option)>, + items: Vec, output_path: &Path, ) { if common::is_mingw_gnu_toolchain(&sess.target) { @@ -47,21 +76,16 @@ fn create_dll_import_lib( // that loaded but crashed with an AV upon calling one of the imported // functions. Therefore, use binutils to create the import library instead, // by writing a .DEF file to the temp dir and calling binutils's dlltool. - create_mingw_dll_import_lib( - sess, - lib_name, - import_name_and_ordinal_vector, - output_path, - ); + create_mingw_dll_import_lib(sess, lib_name, items, output_path); } else { trace!("creating import library"); trace!(" dll_name {:#?}", lib_name); trace!(" output_path {}", output_path.display()); trace!( " import names: {}", - import_name_and_ordinal_vector + items .iter() - .map(|(name, _ordinal)| name.clone()) + .map(|ImportLibraryItem { name, .. }| name.clone()) .collect::>() .join(", "), ); @@ -79,20 +103,7 @@ fn create_dll_import_lib( .emit_fatal(ErrorCreatingImportLibrary { lib_name, error: error.to_string() }), }; - let exports = import_name_and_ordinal_vector - .iter() - .map(|(name, ordinal)| COFFShortExport { - name: name.to_string(), - ext_name: None, - symbol_name: None, - alias_target: None, - ordinal: ordinal.unwrap_or(0), - noname: ordinal.is_some(), - data: false, - private: false, - constant: false, - }) - .collect::>(); + let exports = items.into_iter().map(Into::into).collect::>(); let machine = match &*sess.target.arch { "x86_64" => MachineTypes::AMD64, "x86" => MachineTypes::I386, @@ -160,16 +171,16 @@ fn extract_bundled_libs<'a>( fn create_mingw_dll_import_lib( sess: &Session, lib_name: &str, - import_name_and_ordinal_vector: Vec<(String, Option)>, + items: Vec, output_path: &Path, ) { let def_file_path = output_path.with_extension("def"); let def_file_content = format!( "EXPORTS\n{}", - import_name_and_ordinal_vector + items .into_iter() - .map(|(name, ordinal)| { + .map(|ImportLibraryItem { name, ordinal, .. }| { match ordinal { Some(n) => format!("{name} @{n} NONAME"), None => name, diff --git a/compiler/rustc_codegen_ssa/src/back/link.rs b/compiler/rustc_codegen_ssa/src/back/link.rs index 8b855bd0dd5..5fd6a2553ee 100644 --- a/compiler/rustc_codegen_ssa/src/back/link.rs +++ b/compiler/rustc_codegen_ssa/src/back/link.rs @@ -45,7 +45,7 @@ use tempfile::Builder as TempFileBuilder; use tracing::{debug, info, warn}; -use super::archive::{ArchiveBuilder, ArchiveBuilderBuilder}; +use super::archive::{ArchiveBuilder, ArchiveBuilderBuilder, ImportLibraryItem}; use super::command::Command; use super::linker::{self, Linker}; use super::metadata::{create_wrapper_file, MetadataPosition}; @@ -498,16 +498,35 @@ fn create_dll_import_libs<'a>( let mingw_gnu_toolchain = common::is_mingw_gnu_toolchain(&sess.target); - let import_name_and_ordinal_vector: Vec<(String, Option)> = raw_dylib_imports + let items: Vec = raw_dylib_imports .iter() .map(|import: &DllImport| { if sess.target.arch == "x86" { - ( - common::i686_decorated_name(import, mingw_gnu_toolchain, false), - import.ordinal(), - ) + ImportLibraryItem { + name: common::i686_decorated_name( + import, + mingw_gnu_toolchain, + false, + false, + ), + ordinal: import.ordinal(), + symbol_name: import.is_missing_decorations().then(|| { + common::i686_decorated_name( + import, + mingw_gnu_toolchain, + false, + true, + ) + }), + is_data: !import.is_fn, + } } else { - (import.name.to_string(), import.ordinal()) + ImportLibraryItem { + name: import.name.to_string(), + ordinal: import.ordinal(), + symbol_name: None, + is_data: !import.is_fn, + } } }) .collect(); @@ -515,7 +534,7 @@ fn create_dll_import_libs<'a>( archive_builder_builder.create_dll_import_lib( sess, &raw_dylib_name, - import_name_and_ordinal_vector, + items, &output_path, ); diff --git a/compiler/rustc_codegen_ssa/src/common.rs b/compiler/rustc_codegen_ssa/src/common.rs index 582a2a87e48..965bd34ac14 100644 --- a/compiler/rustc_codegen_ssa/src/common.rs +++ b/compiler/rustc_codegen_ssa/src/common.rs @@ -187,12 +187,15 @@ pub fn i686_decorated_name( dll_import: &DllImport, mingw: bool, disable_name_mangling: bool, + force_fully_decorated: bool, ) -> String { let name = dll_import.name.as_str(); - let (add_prefix, add_suffix) = match dll_import.import_name_type { - Some(PeImportNameType::NoPrefix) => (false, true), - Some(PeImportNameType::Undecorated) => (false, false), + let (add_prefix, add_suffix) = match (force_fully_decorated, dll_import.import_name_type) { + // No prefix is a bit weird, in that LLVM/ar_archive_writer won't emit it, so we will + // ignore `force_fully_decorated` and always partially decorate it. + (_, Some(PeImportNameType::NoPrefix)) => (false, true), + (false, Some(PeImportNameType::Undecorated)) => (false, false), _ => (true, true), }; diff --git a/compiler/rustc_session/src/cstore.rs b/compiler/rustc_session/src/cstore.rs index da7a82fee94..16432095acc 100644 --- a/compiler/rustc_session/src/cstore.rs +++ b/compiler/rustc_session/src/cstore.rs @@ -130,6 +130,11 @@ pub fn ordinal(&self) -> Option { None } } + + pub fn is_missing_decorations(&self) -> bool { + self.import_name_type == Some(PeImportNameType::Undecorated) + || self.import_name_type == Some(PeImportNameType::NoPrefix) + } } /// Calling convention for a function defined in an external library.