64ba25d0f2
Also change target_pointer_width to pointer_width.
Preparation for a subsequent type change of
target_pointer_width to an integer together with a rename
to pointer_width.
On its own, this commit breaks the build. I don't like making
build-breaking commits, but in this instance I believe that it
makes review easier, as the "real" changes of this PR can be
seen much more easily.
Result of running:
find compiler/rustc_target/src/spec/ -type f -exec sed -i -e 's/target_pointer_width: "\(.*\)"\..*,/pointer_width: \1,/g' {} \;
49 lines
2.0 KiB
Rust
49 lines
2.0 KiB
Rust
// Generic ARMv7-A target for bare-metal code - floating point disabled
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//
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// This is basically the `armv7-unknown-linux-gnueabi` target with some changes
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// (listed below) to bring it closer to the bare-metal `thumb` & `aarch64`
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// targets:
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//
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// - `TargetOptions.features`: added `+strict-align`. rationale: unaligned
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// memory access is disabled on boot on these cores
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// - linker changed to LLD. rationale: C is not strictly needed to build
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// bare-metal binaries (the `gcc` linker has the advantage that it knows where C
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// libraries and crt*.o are but it's not much of an advantage here); LLD is also
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// faster
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// - `target_os` set to `none`. rationale: matches `thumb` targets
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// - `target_{env,vendor}` set to an empty string. rationale: matches `thumb`
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// targets
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// - `panic_strategy` set to `abort`. rationale: matches `thumb` targets
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// - `relocation-model` set to `static`; also no PIE, no relro and no dynamic
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// linking. rationale: matches `thumb` targets
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use super::{LinkerFlavor, LldFlavor, PanicStrategy, RelocModel, Target, TargetOptions};
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pub fn target() -> Target {
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let opts = TargetOptions {
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linker: Some("rust-lld".to_owned()),
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features: "+v7,+thumb2,+soft-float,-neon,+strict-align".to_string(),
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executables: true,
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relocation_model: RelocModel::Static,
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disable_redzone: true,
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max_atomic_width: Some(64),
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panic_strategy: PanicStrategy::Abort,
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unsupported_abis: super::arm_base::unsupported_abis(),
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emit_debug_gdb_scripts: false,
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..Default::default()
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};
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Target {
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llvm_target: "armv7a-none-eabi".to_string(),
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target_endian: "little".to_string(),
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pointer_width: 32,
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target_c_int_width: "32".to_string(),
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target_os: "none".to_string(),
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target_env: String::new(),
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target_vendor: String::new(),
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data_layout: "e-m:e-p:32:32-Fi8-i64:64-v128:64:128-a:0:32-n32-S64".to_string(),
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arch: "arm".to_string(),
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linker_flavor: LinkerFlavor::Lld(LldFlavor::Ld),
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options: opts,
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}
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}
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