Merging upstream version 125.0.1.

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 3 insertions, 1 deletions

diff --git a/xpcom/reflect/xptcall/md/unix/xptcinvoke_loongarch64.cpp b/xpcom/reflect/xptcall/md/unix/xptcinvoke_loongarch64.cpp
index 61bb7b2efd..e73dd023cb 100644
--- a/xpcom/reflect/xptcall/md/unix/xptcinvoke_loongarch64.cpp
+++ b/xpcom/reflect/xptcall/md/unix/xptcinvoke_loongarch64.cpp
@@ -44,7 +44,9 @@ extern "C" void invoke_copy_to_stack(uint64_t* gpregs, double* fpregs,
           value = s->val.u16;
           break;
         case nsXPTType::T_U32:
-          value = s->val.u32;
+          // 32-bit values need to be sign-extended in 64-bit registers,
+          // so use the signed value here.
+          value = s->val.i32;
           break;
         case nsXPTType::T_U64:
           value = s->val.u64;