Add support for const operands and options to global_asm!

On x86, the default syntax is also switched to Intel to match asm!

Author: Amanieu

alloc/Cargo.toml

@@ -11,7 +11,7 @@ edition = "2018"
 
 [dependencies]
 core = { path = "../core" }
-compiler_builtins = { version = "0.1.39", features = ['rustc-dep-of-std'] }
+compiler_builtins = { version = "0.1.40", features = ['rustc-dep-of-std'] }
 
 [dev-dependencies]
 rand = "0.7"

core/src/macros/mod.rs

@@ -1358,7 +1358,10 @@ pub(crate) mod builtin {
     #[rustc_builtin_macro]
     #[macro_export]
     macro_rules! global_asm {
-        ("assembly") => {
+        ("assembly template",
+            $(operands,)*
+            $(options($(option),*))?
+        ) => {
             /* compiler built-in */
         };
     }

std/Cargo.toml

@@ -17,7 +17,7 @@ panic_unwind = { path = "../panic_unwind", optional = true }
 panic_abort = { path = "../panic_abort" }
 core = { path = "../core" }
 libc = { version = "0.2.93", default-features = false, features = ['rustc-dep-of-std'] }
-compiler_builtins = { version = "0.1.39" }
+compiler_builtins = { version = "0.1.40" }
 profiler_builtins = { path = "../profiler_builtins", optional = true }
 unwind = { path = "../unwind" }
 hashbrown = { version = "0.11", default-features = false, features = ['rustc-dep-of-std'] }

std/src/sys/sgx/abi/mod.rs

@@ -15,7 +15,7 @@ pub mod tls;
 pub mod usercalls;
 
 #[cfg(not(test))]
-global_asm!(include_str!("entry.S"));
+global_asm!(include_str!("entry.S"), options(att_syntax));
 
 #[repr(C)]
 struct EntryReturn(u64, u64);