rustc_target/spec/targets/
armv4t_none_eabi.rs

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, TargetMetadata,
14    TargetOptions, cvs,
15};
16
17pub(crate) fn target() -> Target {
18    Target {
19        llvm_target: "armv4t-none-eabi".into(),
20        metadata: TargetMetadata {
21            description: Some("Bare Armv4T".into()),
22            tier: Some(3),
23            host_tools: Some(false),
24            std: Some(false),
25        },
26        pointer_width: 32,
27        arch: "arm".into(),
28        /* Data layout args are '-' separated:
29         * little endian
30         * stack is 64-bit aligned (EABI)
31         * pointers are 32-bit
32         * i64 must be 64-bit aligned (EABI)
33         * mangle names with ELF style
34         * native integers are 32-bit
35         * All other elements are default
36         */
37        data_layout: "e-m:e-p:32:32-Fi8-i64:64-v128:64:128-a:0:32-n32-S64".into(),
38        options: TargetOptions {
39            abi: "eabi".into(),
40            llvm_floatabi: Some(FloatAbi::Soft),
41            linker_flavor: LinkerFlavor::Gnu(Cc::No, Lld::Yes),
42            linker: Some("rust-lld".into()),
43            asm_args: cvs!["-mthumb-interwork", "-march=armv4t", "-mlittle-endian",],
44            // Force-enable 32-bit atomics, which allows the use of atomic load/store only.
45            // The resulting atomics are ABI incompatible with atomics backed by libatomic.
46            features: "+soft-float,+strict-align,+atomics-32".into(),
47            main_needs_argc_argv: false,
48            atomic_cas: false,
49            has_thumb_interworking: true,
50            relocation_model: RelocModel::Static,
51            panic_strategy: PanicStrategy::Abort,
52            // From thumb_base, rust-lang/rust#44993.
53            emit_debug_gdb_scripts: false,
54            // From thumb_base, GCC gives enums a minimum of 8 bits on no-os targets.
55            c_enum_min_bits: Some(8),
56            ..Default::default()
57        },
58    }
59}
rustc_target/spec/targets/armv4t_none_eabi.rs

rustc_target/spec/targets/
armv4t_none_eabi.rs
