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riscv: Fix ELF header flags #106797

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merged 1 commit into from
Jan 14, 2023
Merged

riscv: Fix ELF header flags #106797

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22 changes: 17 additions & 5 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 @@ -165,11 +165,23 @@ pub(crate) fn create_object_file(sess: &Session) -> Option<write::Object<'static
};
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;
Architecture::Riscv32 | Architecture::Riscv64 => {
// Source: https://github.com/riscv-non-isa/riscv-elf-psabi-doc/blob/079772828bd10933d34121117a222b4cc0ee2200/riscv-elf.adoc
let mut e_flags: u32 = 0x0;
let features = &sess.target.options.features;
// Check if compressed is enabled
if features.contains("+c") {
e_flags |= elf::EF_RISCV_RVC;
}

// Select the appropriate floating-point ABI
if features.contains("+d") {
e_flags |= elf::EF_RISCV_FLOAT_ABI_DOUBLE;
} else if features.contains("+f") {
e_flags |= elf::EF_RISCV_FLOAT_ABI_SINGLE;
} else {
e_flags |= elf::EF_RISCV_FLOAT_ABI_SOFT;
}
e_flags
}
_ => 0,
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