From 08582ac033595c0b2ab283d8c4f07c94dba7623a Mon Sep 17 00:00:00 2001
From: Alex Crichton <alex@alexcrichton.com>
Date: Mon, 10 Aug 2026 14:58:33 -0700
Subject: [PATCH] Export TLS information by default on wasip3

---
 cmake/wasi-sdk-toolchain.cmake |  3 +++
 src/llvm-pr-215413.patch       | 14 ++++++++++++++
 2 files changed, 17 insertions(+)
 create mode 100644 src/llvm-pr-215413.patch

diff --git a/cmake/wasi-sdk-toolchain.cmake b/cmake/wasi-sdk-toolchain.cmake
index 2585f50..a0086b4 100644
--- a/cmake/wasi-sdk-toolchain.cmake
+++ b/cmake/wasi-sdk-toolchain.cmake
@@ -264,6 +264,9 @@ ExternalProject_Add(llvm-build
   COMMAND
     ${CMAKE_COMMAND} -E chdir .. bash -c
       "git apply ${CMAKE_SOURCE_DIR}/src/llvm-pr-209282.patch || git apply ${CMAKE_SOURCE_DIR}/src/llvm-pr-209282.patch -R --check"
+  COMMAND
+    ${CMAKE_COMMAND} -E chdir .. bash -c
+      "git apply ${CMAKE_SOURCE_DIR}/src/llvm-pr-215413.patch || git apply ${CMAKE_SOURCE_DIR}/src/llvm-pr-215413.patch -R --check"
 )
 
 add_custom_target(build ALL DEPENDS llvm-build)
diff --git a/src/llvm-pr-215413.patch b/src/llvm-pr-215413.patch
new file mode 100644
index 0000000..d862fb6
--- /dev/null
+++ b/src/llvm-pr-215413.patch
@@ -0,0 +1,14 @@
+diff --git a/lld/wasm/Driver.cpp b/lld/wasm/Driver.cpp
+index 740e8878c6e03..da5a5d6092c1e 100644
+--- a/lld/wasm/Driver.cpp
++++ b/lld/wasm/Driver.cpp
+@@ -1004,6 +1004,9 @@ static void createSyntheticSymbols() {
+       ctx.sym.getTLSBase =
+           createUndefinedFunction("__wasm_get_tls_base", &getTLSBaseSignature);
+       ctx.sym.getTLSBase->markLive();
++      ctx.arg.exportedSymbols.insert(ctx.sym.tlsSize->getName());
++      ctx.arg.exportedSymbols.insert(ctx.sym.tlsAlign->getName());
++      ctx.arg.exportedSymbols.insert(ctx.sym.initTLS->getName());
+     }
+   }
+ }