55 lines
2.3 KiB
Rust
55 lines
2.3 KiB
Rust
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//! Targets the ARMv4T, with code as `a32` code by default.
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//!
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//! Primarily of use for the GBA, but usable with other devices too.
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//!
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//! Please ping @Lokathor if changes are needed.
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//!
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//! This target profile assumes that you have the ARM binutils in your path
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//! (specifically the linker, `arm-none-eabi-ld`). They can be obtained for free
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//! for all major OSes from the ARM developer's website, and they may also be
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//! available in your system's package manager. Unfortunately, the standard
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//! linker that Rust uses (`lld`) only supports as far back as `ARMv5TE`, so we
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//! must use the GNU `ld` linker.
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//!
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//! **Important:** This target profile **does not** specify a linker script. You
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//! just get the default link script when you build a binary for this target.
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//! The default link script is very likely wrong, so you should use
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//! `-Clink-arg=-Tmy_script.ld` to override that with a correct linker script.
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use crate::spec::{cvs, LinkerFlavor, PanicStrategy, RelocModel, Target, TargetOptions};
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pub fn target() -> Target {
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Target {
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llvm_target: "armv4t-none-eabi".into(),
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pointer_width: 32,
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arch: "arm".into(),
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/* Data layout args are '-' separated:
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* little endian
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* stack is 64-bit aligned (EABI)
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* pointers are 32-bit
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* i64 must be 64-bit aligned (EABI)
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* mangle names with ELF style
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* native integers are 32-bit
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* All other elements are default
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*/
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data_layout: "e-m:e-p:32:32-Fi8-i64:64-v128:64:128-a:0:32-n32-S64".into(),
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options: TargetOptions {
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abi: "eabi".into(),
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linker_flavor: LinkerFlavor::Ld,
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linker: Some("arm-none-eabi-ld".into()),
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asm_args: cvs!["-mthumb-interwork", "-march=armv4t", "-mlittle-endian",],
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features: "+soft-float,+strict-align".into(),
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main_needs_argc_argv: false,
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atomic_cas: false,
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has_thumb_interworking: true,
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relocation_model: RelocModel::Static,
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panic_strategy: PanicStrategy::Abort,
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// from thumb_base, rust-lang/rust#44993.
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emit_debug_gdb_scripts: false,
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// from thumb_base, apparently gcc/clang give enums a minimum of 8 bits on no-os targets
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c_enum_min_bits: 8,
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..Default::default()
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},
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}
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}
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