src/librustc_target/spec/x86_64_fortanix_unknown_sgx.rs

   1 use std::iter;
   2
   3 use super::{LinkerFlavor, LldFlavor, PanicStrategy, Target, TargetOptions};
   4
   5 pub fn target() -> Result<Target, String> {
   6     const PRE_LINK_ARGS: &[&str] = &[
   7         "--as-needed",
   8         "--eh-frame-hdr",
   9         "-z" , "noexecstack",
  10         "-e","elf_entry",
  11         "-Bstatic",
  12         "--gc-sections",
  13         "-z","text",
  14         "-z","norelro",
  15         "--no-undefined",
  16         "--error-unresolved-symbols",
  17         "--no-undefined-version",
  18         "-Bsymbolic",
  19         "--export-dynamic",
  20         // The following symbols are needed by libunwind, which is linked after
  21         // libstd. Make sure they're included in the link.
  22         "-u","__rust_abort",
  23         "-u","__rust_c_alloc",
  24         "-u","__rust_c_dealloc",
  25         "-u","__rust_print_err",
  26         "-u","__rust_rwlock_rdlock",
  27         "-u","__rust_rwlock_unlock",
  28         "-u","__rust_rwlock_wrlock"
  29     ];
  30
  31     const EXPORT_SYMBOLS: &[&str] = &[
  32         "sgx_entry",
  33         "HEAP_BASE",
  34         "HEAP_SIZE",
  35         "RELA",
  36         "RELACOUNT",
  37         "ENCLAVE_SIZE",
  38         "CFGDATA_BASE",
  39         "DEBUG",
  40         "EH_FRM_HDR_BASE",
  41         "EH_FRM_HDR_SIZE",
  42         "TEXT_BASE",
  43         "TEXT_SIZE",
  44     ];
  45     let opts = TargetOptions {
  46         dynamic_linking: false,
  47         executables: true,
  48         linker_is_gnu: true,
  49         linker: Some("rust-lld".to_owned()),
  50         max_atomic_width: Some(64),
  51         panic_strategy: PanicStrategy::Unwind,
  52         cpu: "x86-64".into(),
  53         features: "+rdrnd,+rdseed".into(),
  54         position_independent_executables: true,
  55         pre_link_args: iter::once((
  56             LinkerFlavor::Lld(LldFlavor::Ld),
  57             PRE_LINK_ARGS.iter().cloned().map(String::from).collect(),
  58         ))
  59         .collect(),
  60         post_link_objects: vec!["libunwind.a".into()],
  61         override_export_symbols: Some(EXPORT_SYMBOLS.iter().cloned().map(String::from).collect()),
  62         relax_elf_relocations: true,
  63         ..Default::default()
  64     };
  65     Ok(Target {
  66         llvm_target: "x86_64-elf".into(),
  67         target_endian: "little".into(),
  68         target_pointer_width: "64".into(),
  69         target_c_int_width: "32".into(),
  70         target_os: "unknown".into(),
  71         target_env: "sgx".into(),
  72         target_vendor: "fortanix".into(),
  73         data_layout: "e-m:e-i64:64-f80:128-n8:16:32:64-S128".into(),
  74         arch: "x86_64".into(),
  75         linker_flavor: LinkerFlavor::Lld(LldFlavor::Ld),
  76         options: opts,
  77     })
  78 }