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Rollup merge of #97633 - mkroening:object-osabi, r=petrochenkov

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Session object: Set OS/ABI

Closes https://github.com/rust-lang/rust/issues/97535.

This depends on
* https://github.com/gimli-rs/object/pull/438

This adapts LLVM's behavior of [`MCELFObjectTargetWriter::getOSABI`](8c8a2679a2/llvm/include/llvm/MC/MCELFObjectWriter.h (L72-L86)).
This commit is contained in:
Yuki Okushi 2022-06-24 16:43:43 +09:00 • committed by GitHub
commit 0af99c99c4
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3 changed files with 29 additions and 7 deletions
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2
compiler/rustc_codegen_ssa/Cargo.toml
View file

@ -42,6 +42,6 @@ rustc_target = { path = "../rustc_target" }
rustc_session = { path = "../rustc_session" }
[dependencies.object]
version = "0.28.4"
version = "0.29.0"
default-features = false
features = ["read_core", "elf", "macho", "pe", "unaligned", "archive", "write"]

19
compiler/rustc_codegen_ssa/src/back/metadata.rs
View file

@ -130,7 +130,7 @@ pub(crate) fn create_object_file(sess: &Session) -> Option<write::Object<'static
};
let mut file = write::Object::new(binary_format, architecture, endianness);
match architecture {
let e_flags = match architecture {
Architecture::Mips => {
let arch = match sess.target.options.cpu.as_ref() {
"mips1" => elf::EF_MIPS_ARCH_1,
@ -149,7 +149,7 @@ pub(crate) fn create_object_file(sess: &Session) -> Option<write::Object<'static
if sess.target.options.cpu.contains("r6") {
e_flags |= elf::EF_MIPS_NAN2008;
}
file.flags = FileFlags::Elf { e_flags };
e_flags
}
Architecture::Mips64 => {
// copied from `mips64el-linux-gnuabi64-gcc foo.c -c`
@ -160,17 +160,26 @@ pub(crate) fn create_object_file(sess: &Session) -> Option<write::Object<'static
} else {
elf::EF_MIPS_ARCH_64R2
};
file.flags = FileFlags::Elf { e_flags };
e_flags
}
Architecture::Riscv64 if sess.target.options.features.contains("+d") => {
// copied from `riscv64-linux-gnu-gcc foo.c -c`, note though
// that the `+d` target feature represents whether the double
// float abi is enabled.
let e_flags = elf::EF_RISCV_RVC | elf::EF_RISCV_FLOAT_ABI_DOUBLE;
file.flags = FileFlags::Elf { e_flags };
e_flags
}
_ => {}
_ => 0,
};
// adapted from LLVM's `MCELFObjectTargetWriter::getOSABI`
let os_abi = match sess.target.options.os.as_ref() {
"hermit" => elf::ELFOSABI_STANDALONE,
"freebsd" => elf::ELFOSABI_FREEBSD,
"solaris" => elf::ELFOSABI_SOLARIS,
_ => elf::ELFOSABI_NONE,
};
let abi_version = 0;
file.flags = FileFlags::Elf { os_abi, abi_version, e_flags };
Some(file)
}