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Support explicit 32-bit MIPS ABI for the synthetic object #113497

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Jul 11, 2023
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Support explicit 32-bit MIPS ABI for the synthetic object #113497

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12 changes: 10 additions & 2 deletions compiler/rustc_codegen_ssa/src/back/metadata.rs
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Original file line number Diff line number Diff line change
Expand Up @@ -243,8 +243,16 @@ pub(crate) fn create_object_file(sess: &Session) -> Option<write::Object<'static
s if s.contains("r6") => elf::EF_MIPS_ARCH_32R6,
_ => elf::EF_MIPS_ARCH_32R2,
};
// The only ABI LLVM supports for 32-bit MIPS CPUs is o32.
let mut e_flags = elf::EF_MIPS_CPIC | elf::EF_MIPS_ABI_O32 | arch;

let mut e_flags = elf::EF_MIPS_CPIC | arch;

// If the ABI is explicitly given, use it or default to O32.
match sess.target.options.llvm_abiname.to_lowercase().as_str() {
"n32" => e_flags |= elf::EF_MIPS_ABI2,
"o32" => e_flags |= elf::EF_MIPS_ABI_O32,
_ => e_flags |= elf::EF_MIPS_ABI_O32,
};

if sess.target.options.relocation_model != RelocModel::Static {
e_flags |= elf::EF_MIPS_PIC;
}
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