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add details for csky-unknown-linux-gnuabiv2 and add docs

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Dirreke 2023-07-19 22:33:34 +08:00 committed by dirreke
parent 9e5fb333f7
commit 184a9afffb
8 changed files with 145 additions and 56 deletions
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2
compiler/rustc_codegen_llvm/src/asm.rs
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@ -261,7 +261,7 @@ impl<'ll, 'tcx> AsmBuilderMethods<'tcx> for Builder<'_, 'll, 'tcx> {
InlineAsmArch::M68k => {
constraints.push("~{ccr}".to_string());
}
InlineAsmArch::CSKY => {} // https://github.com/llvm/llvm-project/blob/8b76aea8d8b1b71f6220bc2845abc749f18a19b7/clang/lib/Basic/Targets/CSKY.h getClobers()
InlineAsmArch::CSKY => {}
}
}
if !options.contains(InlineAsmOptions::NOMEM) {

48
compiler/rustc_codegen_ssa/src/target_features.rs
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@ -297,14 +297,50 @@ const WASM_ALLOWED_FEATURES: &[(&str, Option<Symbol>)] = &[
const BPF_ALLOWED_FEATURES: &[(&str, Option<Symbol>)] = &[("alu32", Some(sym::bpf_target_feature))];
const CSKY_ALLOWED_FEATURES: &[(&str, Option<Symbol>)] = &[
// tidy-alphabetical-start
("10e60", Some(sym::csky_target_feature)),
("2e3", Some(sym::csky_target_feature)),
("3e3r1", Some(sym::csky_target_feature)),
("3e3r2", Some(sym::csky_target_feature)),
("3e3r3", Some(sym::csky_target_feature)),
("3e7", Some(sym::csky_target_feature)),
("7e10", Some(sym::csky_target_feature)),
("cache", Some(sym::csky_target_feature)),
("doloop", Some(sym::csky_target_feature)),
("dsp1e2", Some(sym::csky_target_feature)),
("dspe60", Some(sym::csky_target_feature)),
("e1", Some(sym::csky_target_feature)),
("e2", Some(sym::csky_target_feature)),
("edsp", Some(sym::csky_target_feature)),
("elrw", Some(sym::csky_target_feature)),
("float1e2", Some(sym::csky_target_feature)),
("float1e3", Some(sym::csky_target_feature)),
("float3e4", Some(sym::csky_target_feature)),
("float7e60", Some(sym::csky_target_feature)),
("floate1", Some(sym::csky_target_feature)),
("hard-tp", Some(sym::csky_target_feature)),
("high-registers", Some(sym::csky_target_feature)),
("hwdiv", Some(sym::csky_target_feature)),
("mp", Some(sym::csky_target_feature)),
("mp1e2", Some(sym::csky_target_feature)),
("nvic", Some(sym::csky_target_feature)),
("trust", Some(sym::csky_target_feature)),
("vdsp2e60f", Some(sym::csky_target_feature)),
("vdspv1", Some(sym::csky_target_feature)),
("vdspv2", Some(sym::csky_target_feature)),
// tidy-alphabetical-end
//fpu
// tidy-alphabetical-start
("fdivdu", Some(sym::csky_target_feature)),
("fpuv2_df", Some(sym::csky_target_feature)),
("fpuv2_sf", Some(sym::csky_target_feature)),
("fpuv3_df", Some(sym::csky_target_feature)),
("fpuv3_hf", Some(sym::csky_target_feature)),
("fpuv3_hi", Some(sym::csky_target_feature)),
("fpuv3_sf", Some(sym::csky_target_feature)),
("hard-float", Some(sym::csky_target_feature)),
("hard-float-abi", Some(sym::csky_target_feature)),
("fpuv2_sf", Some(sym::csky_target_feature)),
("fpuv2_df", Some(sym::csky_target_feature)),
("fpuv3_sf", Some(sym::csky_target_feature)),
("fpuv3_df", Some(sym::csky_target_feature)),
("vdspv2", Some(sym::csky_target_feature)),
("dspv2", Some(sym::csky_target_feature)),
// tidy-alphabetical-end
];
/// When rustdoc is running, provide a list of all known features so that all their respective
/// primitives may be documented.

48
compiler/rustc_target/src/asm/csky.rs
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@ -36,8 +36,8 @@ impl CSKYInlineAsmRegClass {
_arch: InlineAsmArch,
) -> &'static [(InlineAsmType, Option<Symbol>)] {
match self {
Self::reg => types! { _: I8, I16, I32, I64, F32, F64; },
Self::freg => types! { _: F32, F64; },
Self::reg => types! { _: I8, I16, I32; },
Self::freg => types! { _: F32; },
}
}
}
@ -52,31 +52,21 @@ def_regs! {
r4: reg = ["r4","l0"],
r5: reg = ["r5","l1"],
r6: reg = ["r6","l2"],
// r7: reg = ["r7","l3"],
// r8: reg = ["r8","l4"],
// r9: reg = ["r9","l5"],
// r10: reg = ["r10","l6"],
// r11: reg = ["r11","l7"],
// r12: reg = ["r12","t0"],
// r13: reg = ["r13","t1"],
// r14: reg = ["r14","sp"],
// r15: reg = ["r15","lr"],
// r16: reg = ["r16","l8"],
// r17: reg = ["r17","l9"],
// r18: reg = ["r18","t2"],
// r19: reg = ["r19","t3"],
// r20: reg = ["r20","t4"],
// r21: reg = ["r21","t5"],
// r22: reg = ["r22","t6"],
// r23: reg = ["r23","t7", "fp"],
// r24: reg = ["r24","t8", "sop"],
// r25: reg = ["r25","tp", "bsp"],
// r26: reg = ["r26"],
// r27: reg = ["r27"],
// r28: reg = ["r28","gb", "rgb", "rdb"],
// r29: reg = ["r29","tb", "rtb"],
// r30: reg = ["r30","svbr"],
// r31: reg = ["r31","tls"],
r9: reg = ["r9","l5"],// feature e2
r10: reg = ["r10","l6"],// feature e2
r11: reg = ["r11","l7"],// feature e2
r12: reg = ["r12","t0"],// feature e2
r13: reg = ["r13","t1"],// feature e2
r16: reg = ["r16","l8"],// feature high-register
r17: reg = ["r17","l9"],// feature high-register
r18: reg = ["r18","t2"],// feature high-register
r19: reg = ["r19","t3"],// feature high-register
r20: reg = ["r20","t4"],// feature high-register
r21: reg = ["r21","t5"],// feature high-register
r22: reg = ["r22","t6"],// feature high-register
r23: reg = ["r23","t7", "fp"],// feature high-register
r24: reg = ["r24","t8", "sop"],// feature high-register
r25: reg = ["r25","t9","tp", "bsp"],// feature high-register
f0: freg = ["fr0","vr0"],
f1: freg = ["fr1","vr1"],
f2: freg = ["fr2","vr2"],
@ -121,10 +111,6 @@ def_regs! {
"reserver for tls",
#error = ["r28", "gb", "rgb", "rdb"] =>
"the global pointer cannot be used as an operand for inline asm",
#error = ["r9","l5", "r10","l6", "r11","l7", "r12","t0", "r13","t1"] =>
"reserved (no E2)",
#error = ["r16","l8", "r17","l9", "r18","t2", "r19","t3", "r20","t4", "r21","t5", "r22","t6", "r23","t7", "fp", "r24","t8", "sop", "r25","tp", "bsp"] =>
"reserved (no HighRegisters)",
#error = ["r26","r27","r29","tb", "rtb", "r30","svbr"] =>
"reserved by the ABI",
}

8
compiler/rustc_target/src/spec/csky_unknown_linux_gnuabiv2.rs
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@ -1,7 +1,6 @@
use crate::spec::{Target, TargetOptions};
use crate::spec::{Cc, LinkerFlavor, Lld, Target, TargetOptions};
// This target is for glibc Linux on Csky
// hardfloat.
pub fn target() -> Target {
Target {
@ -12,10 +11,9 @@ pub fn target() -> Target {
arch: "csky".into(),
options: TargetOptions {
abi: "abiv2".into(),
//+hard-float, +hard-float-abi, +fpuv2_sf, +fpuv2_df, +fpuv3_sf, +fpuv3_df, +vdspv2, +dspv2, +vdspv1, +3e3r1
features: "".into(),
features: "+2e3,+3e7,+7e10,+cache,+dsp1e2,+dspe60,+e1,+e2,+edsp,+elrw,+hard-tp,+high-registers,+hwdiv,+mp,+mp1e2,+nvic,+trust".into(),
late_link_args_static: TargetOptions::link_args(LinkerFlavor::Gnu(Cc::Yes, Lld::No), &["-l:libatomic.a"]),
max_atomic_width: Some(32),
// mcount: "\u{1}__gnu_mcount_nc".into(),
..super::linux_gnu_base::opts()
},
}

16
src/bootstrap/llvm.rs
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@ -390,6 +390,22 @@ impl Step for Llvm {
ldflags.shared.push(" -latomic");
}
if target.starts_with("csky")
&& !target.contains("freebsd")
&& !target.contains("openbsd")
&& !target.contains("netbsd")
{
// CSKY GCC erroneously requires linking against
// `libatomic` when using 1-byte and 2-byte C++
// atomics but the LLVM build system check cannot
// detect this. Therefore it is set manually here.
// Some BSD uses Clang as its system compiler and
// provides no libatomic in its base system so does
// not want this.
ldflags.exe.push(" -latomic");
ldflags.shared.push(" -latomic");
}
if target.contains("msvc") {
cfg.define("LLVM_USE_CRT_DEBUG", "MT");
cfg.define("LLVM_USE_CRT_RELEASE", "MT");

2
src/doc/rustc/src/platform-support.md
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@ -259,7 +259,7 @@ target | std | host | notes
`avr-unknown-gnu-atmega328` | * | | AVR. Requires `-Z build-std=core`
`bpfeb-unknown-none` | * | | BPF (big endian)
`bpfel-unknown-none` | * | | BPF (little endian)
`csky-unknown-linux-gnuabiv2` | ? | | C-SKY iv2 Linux
`csky-unknown-linux-gnuabiv2` | ✓ | | C-SKY abiv2 Linux(little endian)
`hexagon-unknown-linux-musl` | ? | |
`i386-apple-ios` | ✓ | | 32-bit x86 iOS
[`i586-pc-nto-qnx700`](platform-support/nto-qnx.md) | * | | 32-bit x86 QNX Neutrino 7.0 RTOS |

55
src/doc/rustc/src/platform-support/csky-unknown-linux-gnuabiv2.md
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@ -5,6 +5,8 @@
This target supports [C-SKY](https://github.com/c-sky) CPUs with `abi` v2 and `glibc`.
https://c-sky.github.io/
https://gitlab.com/c-sky/
## Target maintainers
* [@Dirreke](https://github.com/Dirreke)
@ -14,20 +16,55 @@ https://c-sky.github.io/
## Building the target
add `csky-unknown-linux-gnuabiv2` to the `target` list in `config.toml` and `./x build`.
### Get a C toolchain
## Building Rust programs
Compiling rust for this target has been tested on `x86_64` linux hosts. Other host types have not been tested, but may work, if you can find a suitable cross compilation toolchain for them.
Rust programs can be built for that target:
If you don't already have a suitable toolchain, you can download from [here](https://occ-oss-prod.oss-cn-hangzhou.aliyuncs.com/resource/1356021/1619528643136/csky-linux-gnuabiv2-tools-x86_64-glibc-linux-4.9.56-20210423.tar.gz), and unpack it into a directory.
```text
cargo +stage2 --target csky-unknown-linux-gnuabiv2 your-code.rs
### Configure rust
The target can be built by enabling it for a `rustc` build, by placing the following in `config.toml`:
```toml
[build]
target = ["x86_64-unknown-linux-gnu", "csky-unknown-linux-gnuabiv2"]
stage = 2
[target.csky-unknown-linux-gnuabiv2]
# ADJUST THIS PATH TO POINT AT YOUR TOOLCHAIN
cc = "${TOOLCHAIN_PATH}/bin/csky-linux-gnuabiv2-gcc"
### Build
```sh
# in rust dir
./x.py build --stage 2
```
## Testing
## Building and Running Rust programs
Currently there is no support to run the rustc test suite for this target.
To test cross-compiled binaries on a `x86_64` system, you can use the `qemu-cskyv2`. This avoids having a full emulated ARM system by doing dynamic binary translation and dynamic system call translation. It lets you run CSKY programs directly on your `x86_64` kernel. It's very convenient!
## Cross-compilation toolchains and C code
To use:
This target can be cross-compiled from `x86_64` on either Linux systems with [`csky-linux-gunabiv2-tools-x86_64-glibc-linux`](https://github.com/c-sky/toolchain-build).
* Install `qemu-cskyv2` (If you don't already have a qemu, you can download from [here](https://occ-oss-prod.oss-cn-hangzhou.aliyuncs.com/resource//1689324918932/xuantie-qemu-x86_64-Ubuntu-18.04-20230714-0202.tar.gz"), and unpack it into a directory.)
* Link your built toolchain via:
* `rustup toolchain link stage2 ${RUST}/build/x86_64-unknown-linux-gnu/stage2`
* Create a test program
```sh
cargo new hello_world
cd hello_world
```
* Build and run
```sh
CARGO_TARGET_CSKY_UNKNOWN_LINUX_GNUABIV2_RUNNER=${QEMU_PATH}/bin/qemu-cskyv2 -L ${TOOLCHAIN_PATH}/csky-linux-gnuabiv2/libc \
CARGO_TARGET_CSKY_UNKNOWN_LINUX_GNUABIV2_LINKER=${TOOLCHAIN_PATH}/bin/csky-linux-gnuabiv2-gcc \
RUSTFLAGS="-C target-features=+crt-static" \
cargo +stage2 run --target csky-unknown-linux-gnuabiv2
```
Attention: The dynamic-linked program may nor be run by `qemu-cskyv2` but can be run on the target.

22
src/doc/unstable-book/src/language-features/asm-experimental-arch.md
View File

@ -82,8 +82,8 @@ This feature tracks `asm!` and `global_asm!` support for the following architect
| MSP430 | `reg` | None | `i8`, `i16` |
| M68k | `reg`, `reg_addr` | None | `i16`, `i32` |
| M68k | `reg_data` | None | `i8`, `i16`, `i32` |
| CSKY | `reg` | None | `i8`, `i16`, `i32`, `i64` |
| CSKY | `freg` | None | `f32`, `f64` |
| CSKY | `reg` | None | `i8`, `i16`, `i32` |
| CSKY | `freg` | None | `f32`, |
| s390x | `reg` | None | `i8`, `i16`, `i32`, `i64` |
| s390x | `freg` | None | `f32`, `f64` |
@ -107,9 +107,16 @@ This feature tracks `asm!` and `global_asm!` support for the following architect
| M68k | `a5` | `bp` |
| M68k | `a6` | `fp` |
| M68k | `a7` | `sp`, `usp`, `ssp`, `isp` |
| CSKY | `r[0-3]` | `a[0-3]` |
| CSKY | `r[4-11]` | `l[0-7]` |
| CSKY | `r[12-13]` | `t[0-1]` |
| CSKY | `r14` | `sp` |
| CSKY | `r15` | `lr` |
| CSKY | `r28` | `gb`, `rgb`, `rdb` |
| CSKY | `r[16-17]` | `l[8-9]` |
| CSKY | `r[18-25]` | `t[2-9]` |
| CSKY | `r28` | `rgb` |
| CSKY | `r29` | `rtb` |
| CSKY | `r30` | `svbr` |
| CSKY | `r31` | `tls` |
> **Notes**:
@ -132,6 +139,13 @@ This feature tracks `asm!` and `global_asm!` support for the following architect
| AVR | `r0`, `r1`, `r1r0` | Due to an issue in LLVM, the `r0` and `r1` registers cannot be used as inputs or outputs. If modified, they must be restored to their original values before the end of the block. |
|MSP430 | `r0`, `r2`, `r3` | These are the program counter, status register, and constant generator respectively. Neither the status register nor constant generator can be written to. |
| M68k | `a4`, `a5` | Used internally by LLVM for the base pointer and global base pointer. |
| CSKY | `r7`, `r28` | Used internally by LLVM for the base pointer and global base pointer. |
| CSKY | `r8` | Used internally by LLVM for the frame pointer. |
| CSKY | `r14` | Used internally by LLVM for the stack pointer. |
| CSKY | `r15` | This is the link register. |
| CSKY | `r[26-30]` | Reserved by its ABI. |
| CSKY | `r31` | This is the TLS register. |
## Template modifiers
@ -148,6 +162,8 @@ This feature tracks `asm!` and `global_asm!` support for the following architect
| PowerPC | `freg` | None | `0` | None |
| s390x | `reg` | None | `%r0` | None |
| s390x | `freg` | None | `%f0` | None |
| CSKY | `reg` | None | `r0` | None |
| CSKY | `freg` | None | `f0` | None |
# Flags covered by `preserves_flags`