Add a new kind of GlobalVar for symbolic addresses.

These addresses will allow referencing C/C++/Rust-style global variables by name directly.
2017-10-27 13:27:10 -07:00
parent c2665385b1
commit 6fc45b070a
5 changed files with 48 additions and 7 deletions
--- a/cranelift/docs/langref.rst
+++ b/cranelift/docs/langref.rst
@@ -563,6 +563,16 @@ runtime data structures.
                 variable.
    :result GV: Global variable.

+.. inst:: GV = globalsym name
+
+    Declare a global variable at a symbolic address.
+
+    The address of GV is symbolic and will be assigned a relocation, so that
+    it can be resolved by a later linking phase.
+
+    :arg name: External name.
+    :result GV: Global variable.
+
 .. autoinst:: global_addr