mark win32 binaries as large address aware

By default, 32-bit Windows executables are restricted to 2GiB of address
space even when running on 64-bit Windows when 4GiB is available.

Closes #17043

1 files changed, 6 insertions, 0 deletions

diff --git a/src/librustc/back/link.rs b/src/librustc/back/link.rs
index 158ae22331a..1bd3425a83b 100644
--- a/src/librustc/back/link.rs
+++ b/src/librustc/back/link.rs
@@ -1019,6 +1019,12 @@ fn link_args(cmd: &mut Command,
 
         // Mark all dynamic libraries and executables as compatible with ASLR
         cmd.arg("-Wl,--dynamicbase");
+
+        // Mark all dynamic libraries and executables as compatible with the larger 4GiB address
+        // space available to x86 Windows binaries on x86_64.
+        if sess.targ_cfg.arch == abi::X86 {
+            cmd.arg("-Wl,--large-address-aware");
+        }
     }
 
     if sess.targ_cfg.os == abi::OsAndroid {