src/librustc_target/spec/x86_64_fortanix_unknown_sgx.rs

   1 // Copyright 2018 The Rust Project Developers. See the COPYRIGHT
   2 // file at the top-level directory of this distribution and at
   3 // http://rust-lang.org/COPYRIGHT.
   4 //
   5 // Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
   6 // http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
   7 // <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
   8 // option. This file may not be copied, modified, or distributed
   9 // except according to those terms.
  10
  11 use std::iter;
  12
  13 use super::{LinkerFlavor, PanicStrategy, Target, TargetOptions};
  14
  15 pub fn target() -> Result<Target, String> {
  16     const PRE_LINK_ARGS: &[&str] = &[
  17         "-Wl,--as-needed",
  18         "-Wl,-z,noexecstack",
  19         "-m64",
  20         "-fuse-ld=gold",
  21         "-nostdlib",
  22         "-shared",
  23         "-Wl,-e,sgx_entry",
  24         "-Wl,-Bstatic",
  25         "-Wl,--gc-sections",
  26         "-Wl,-z,text",
  27         "-Wl,-z,norelro",
  28         "-Wl,--rosegment",
  29         "-Wl,--no-undefined",
  30         "-Wl,--error-unresolved-symbols",
  31         "-Wl,--no-undefined-version",
  32         "-Wl,-Bsymbolic",
  33         "-Wl,--export-dynamic",
  34     ];
  35
  36     const EXPORT_SYMBOLS: &[&str] = &[
  37         "sgx_entry",
  38         "HEAP_BASE",
  39         "HEAP_SIZE",
  40         "RELA",
  41         "RELACOUNT",
  42         "ENCLAVE_SIZE",
  43         "CFGDATA_BASE",
  44         "DEBUG",
  45         "EH_FRM_HDR_BASE",
  46         "EH_FRM_HDR_SIZE",
  47         "TEXT_BASE",
  48         "TEXT_SIZE",
  49     ];
  50     let opts = TargetOptions {
  51         dynamic_linking: false,
  52         executables: true,
  53         linker_is_gnu: true,
  54         max_atomic_width: Some(64),
  55         panic_strategy: PanicStrategy::Unwind,
  56         cpu: "x86-64".into(),
  57         features: "+rdrnd,+rdseed".into(),
  58         position_independent_executables: true,
  59         pre_link_args: iter::once((
  60             LinkerFlavor::Gcc,
  61             PRE_LINK_ARGS.iter().cloned().map(String::from).collect(),
  62         ))
  63         .collect(),
  64         post_link_objects: vec!["libunwind.a".into()],
  65         override_export_symbols: Some(EXPORT_SYMBOLS.iter().cloned().map(String::from).collect()),
  66         ..Default::default()
  67     };
  68     Ok(Target {
  69         llvm_target: "x86_64-unknown-linux-gnu".into(),
  70         target_endian: "little".into(),
  71         target_pointer_width: "64".into(),
  72         target_c_int_width: "32".into(),
  73         target_os: "unknown".into(),
  74         target_env: "sgx".into(),
  75         target_vendor: "fortanix".into(),
  76         data_layout: "e-m:e-i64:64-f80:128-n8:16:32:64-S128".into(),
  77         arch: "x86_64".into(),
  78         linker_flavor: LinkerFlavor::Gcc,
  79         options: opts,
  80     })
  81 }