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Auto merge of #112550 - loongarch-rs:fix-eflags, r=cjgillot

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loongarch: Fix ELF header flags

This patch changes the ELF header flags so that the ABI matches the floating-point features. It also updates the link to the new official documentation.
This commit is contained in:
bors 2023-07-01 09:31:35 +00:00
commit 7905eff5f7
1 changed files with 13 additions and 2 deletions
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15
compiler/rustc_codegen_ssa/src/back/metadata.rs
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@ -284,8 +284,19 @@ pub(crate) fn create_object_file(sess: &Session) -> Option<write::Object<'static
e_flags
}
Architecture::LoongArch64 => {
// Source: https://loongson.github.io/LoongArch-Documentation/LoongArch-ELF-ABI-EN.html#_e_flags_identifies_abi_type_and_version
elf::EF_LARCH_OBJABI_V1 | elf::EF_LARCH_ABI_DOUBLE_FLOAT
// Source: https://github.com/loongson/la-abi-specs/blob/release/laelf.adoc#e_flags-identifies-abi-type-and-version
let mut e_flags: u32 = elf::EF_LARCH_OBJABI_V1;
let features = &sess.target.options.features;
// Select the appropriate floating-point ABI
if features.contains("+d") {
e_flags |= elf::EF_LARCH_ABI_DOUBLE_FLOAT;
} else if features.contains("+f") {
e_flags |= elf::EF_LARCH_ABI_SINGLE_FLOAT;
} else {
e_flags |= elf::EF_LARCH_ABI_SOFT_FLOAT;
}
e_flags
}
Architecture::Avr => {
// Resolve the ISA revision and set