rustc_target/spec/targets/
armv4t_none_eabi.rs

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1//! Targets the ARMv4T, with code as `a32` code by default.
2//!
3//! Primarily of use for the GBA, but usable with other devices too.
4//!
5//! Please ping @Lokathor if changes are needed.
6//!
7//! **Important:** This target profile **does not** specify a linker script. You
8//! just get the default link script when you build a binary for this target.
9//! The default link script is very likely wrong, so you should use
10//! `-Clink-arg=-Tmy_script.ld` to override that with a correct linker script.
11
12use crate::spec::{
13    Cc, FloatAbi, LinkerFlavor, Lld, PanicStrategy, RelocModel, Target, TargetOptions, cvs,
14};
15
16pub(crate) fn target() -> Target {
17    Target {
18        llvm_target: "armv4t-none-eabi".into(),
19        metadata: crate::spec::TargetMetadata {
20            description: Some("Bare Armv4T".into()),
21            tier: Some(3),
22            host_tools: Some(false),
23            std: Some(false),
24        },
25        pointer_width: 32,
26        arch: "arm".into(),
27        /* Data layout args are '-' separated:
28         * little endian
29         * stack is 64-bit aligned (EABI)
30         * pointers are 32-bit
31         * i64 must be 64-bit aligned (EABI)
32         * mangle names with ELF style
33         * native integers are 32-bit
34         * All other elements are default
35         */
36        data_layout: "e-m:e-p:32:32-Fi8-i64:64-v128:64:128-a:0:32-n32-S64".into(),
37        options: TargetOptions {
38            abi: "eabi".into(),
39            llvm_floatabi: Some(FloatAbi::Soft),
40            linker_flavor: LinkerFlavor::Gnu(Cc::No, Lld::Yes),
41            linker: Some("rust-lld".into()),
42            asm_args: cvs!["-mthumb-interwork", "-march=armv4t", "-mlittle-endian",],
43            // Force-enable 32-bit atomics, which allows the use of atomic load/store only.
44            // The resulting atomics are ABI incompatible with atomics backed by libatomic.
45            features: "+soft-float,+strict-align,+atomics-32".into(),
46            main_needs_argc_argv: false,
47            atomic_cas: false,
48            has_thumb_interworking: true,
49            relocation_model: RelocModel::Static,
50            panic_strategy: PanicStrategy::Abort,
51            // From thumb_base, rust-lang/rust#44993.
52            emit_debug_gdb_scripts: false,
53            // From thumb_base, GCC gives enums a minimum of 8 bits on no-os targets.
54            c_enum_min_bits: Some(8),
55            ..Default::default()
56        },
57    }
58}
rustc_target/spec/targets/armv4t_none_eabi.rs

rustc_target/spec/targets/
armv4t_none_eabi.rs
