| // Generic ARMv7-A target for bare-metal code - floating point disabled |
| // |
| // This is basically the `armv7-unknown-linux-gnueabi` target with some changes |
| // (listed below) to bring it closer to the bare-metal `thumb` & `aarch64` |
| // targets: |
| // |
| // - `TargetOptions.features`: added `+strict-align`. rationale: unaligned |
| // memory access is disabled on boot on these cores |
| // - linker changed to LLD. rationale: C is not strictly needed to build |
| // bare-metal binaries (the `gcc` linker has the advantage that it knows where C |
| // libraries and crt*.o are but it's not much of an advantage here); LLD is also |
| // faster |
| // - `target_os` set to `none`. rationale: matches `thumb` targets |
| // - `target_{env,vendor}` set to an empty string. rationale: matches `thumb` |
| // targets |
| // - `panic_strategy` set to `abort`. rationale: matches `thumb` targets |
| // - `relocation-model` set to `static`; also no PIE, no relro and no dynamic |
| // linking. rationale: matches `thumb` targets |
| |
| use super::{LinkerFlavor, LldFlavor, PanicStrategy, RelocModel, Target, TargetOptions}; |
| |
| pub fn target() -> Target { |
| let opts = TargetOptions { |
| linker: Some("rust-lld".to_owned()), |
| features: "+v7,+thumb2,+soft-float,-neon,+strict-align".to_string(), |
| executables: true, |
| relocation_model: RelocModel::Static, |
| disable_redzone: true, |
| max_atomic_width: Some(64), |
| panic_strategy: PanicStrategy::Abort, |
| unsupported_abis: super::arm_base::unsupported_abis(), |
| emit_debug_gdb_scripts: false, |
| ..Default::default() |
| }; |
| Target { |
| llvm_target: "armv7a-none-eabi".to_string(), |
| target_endian: "little".to_string(), |
| pointer_width: 32, |
| target_c_int_width: "32".to_string(), |
| target_os: "none".to_string(), |
| target_env: String::new(), |
| target_vendor: String::new(), |
| data_layout: "e-m:e-p:32:32-Fi8-i64:64-v128:64:128-a:0:32-n32-S64".to_string(), |
| arch: "arm".to_string(), |
| linker_flavor: LinkerFlavor::Lld(LldFlavor::Ld), |
| options: opts, |
| } |
| } |
