diff --git a/llvm/lib/Target/LoongArch/MCTargetDesc/LoongArchAsmBackend.cpp b/llvm/lib/Target/LoongArch/MCTargetDesc/LoongArchAsmBackend.cpp
index 6a8869c5d708..2eb95c2512d5 100644
--- a/llvm/lib/Target/LoongArch/MCTargetDesc/LoongArchAsmBackend.cpp
+++ b/llvm/lib/Target/LoongArch/MCTargetDesc/LoongArchAsmBackend.cpp
@@ -427,11 +427,14 @@ bool LoongArchAsmBackend::addReloc(const MCFragment &F, const MCFixup &Fixup,
           isPCRelFixupResolved(Target.getSubSym(), F))
         return Fallback();
 
-      // In SecA == SecB case. If the section is not linker-relaxable, the
-      // FixedValue has already been calculated out in evaluateFixup,
-      // return true and avoid record relocations.
-      if (&SecA == &SecB && !SecA.isLinkerRelaxable())
-        return true;
+      if (&SecA == &SecB) {
+        // If the section is not linker-relaxable, or if the fixup is in a .dwo
+        // section (where relocations are forbidden), we must resolve the
+        // difference directly. The computed Value in evaluateFixup is correct
+        // based on the current layout.
+        if (!SecA.isLinkerRelaxable() || SecCur.getName().ends_with(".dwo"))
+          return true;
+      }
     }
 
     switch (Fixup.getKind()) {
diff --git a/llvm/test/DebugInfo/LoongArch/dwo-no-relocations.ll b/llvm/test/DebugInfo/LoongArch/dwo-no-relocations.ll
new file mode 100644
index 000000000000..cf2b7cf1626b
--- /dev/null
+++ b/llvm/test/DebugInfo/LoongArch/dwo-no-relocations.ll
@@ -0,0 +1,45 @@
+;; Ensure no relocations are emitted into .debug_*.dwo sections.
+;; This used to fail when relaxation was enabled.
+
+; RUN: llc --mtriple=loongarch64-unknown-linux-gnu --dwarf-version=5 \
+; RUN:     --split-dwarf-file=foo.dwo --split-dwarf-output=%t.dwo --mattr=+relax --filetype=obj %s -o %t.o
+; RUN: llvm-readobj -r %t.dwo | FileCheck %s --check-prefix=DWO-RELOC
+
+; DWO-RELOC: Relocations [
+; DWO-RELOC-NEXT: ]
+
+@.str = external constant [3 x i8]
+
+define i64 @_ZN15partition_alloc8internal4base7strings8internal12SafeSNPrintfEPcmPKcPKNS3_3ArgEm(i1 %cmp14.i622) !dbg !3 {
+entry:
+  %0 = load i8, ptr @.str, align 1
+  br i1 %cmp14.i622, label %while.body.i.preheader, label %for.inc.preheader.i, !dbg !6
+
+while.body.i.preheader:                           ; preds = %entry
+  store i8 %0, ptr null, align 1
+  ret i64 0
+
+for.inc.preheader.i:                              ; preds = %entry
+  %strlen.i = load volatile i64, ptr @.str, align 8
+  br label %do.body61.i
+
+do.body61.i:                                      ; preds = %do.body61.i, %for.inc.preheader.i
+  %reverse_prefix.2.i = phi ptr [ null, %for.inc.preheader.i ], [ %incdec.ptr98.i, %do.body61.i ]
+  %cmp96.i = icmp ugt ptr %reverse_prefix.2.i, null
+  %incdec.ptr98.i = getelementptr i8, ptr %reverse_prefix.2.i, i64 -1, !dbg !9
+  br label %do.body61.i
+}
+
+!llvm.dbg.cu = !{!0}
+!llvm.module.flags = !{!2}
+
+!0 = distinct !DICompileUnit(language: DW_LANG_C_plus_plus_14, file: !1, producer: "clang version 22.1.2 (https://github.com/llvm/llvm-project.git 6121df77a781d2e6f9a8e569aa45ccfffd6c7e0e)", isOptimized: true, runtimeVersion: 0, splitDebugFilename: "safe_sprintf.dwo", emissionKind: LineTablesOnly, splitDebugInlining: false, nameTableKind: GNU)
+!1 = !DIFile(filename: "../../third_party/partition_alloc/src/partition_alloc/partition_alloc_base/strings/safe_sprintf.cc", directory: "/home/wanglei")
+!2 = !{i32 2, !"Debug Info Version", i32 3}
+!3 = distinct !DISubprogram(name: "SafeSNPrintf", scope: !1, file: !1, line: 437, type: !4, scopeLine: 441, flags: DIFlagPrototyped | DIFlagAllCallsDescribed, spFlags: DISPFlagDefinition | DISPFlagOptimized, unit: !0, keyInstructions: true)
+!4 = !DISubroutineType(types: !5)
+!5 = !{}
+!6 = !DILocation(line: 326, column: 13, scope: !7, inlinedAt: !8, atomGroup: 23, atomRank: 1)
+!7 = distinct !DISubprogram(name: "IToASCII", scope: !1, file: !1, line: 276, type: !4, scopeLine: 282, flags: DIFlagPrototyped | DIFlagAllCallsDescribed, spFlags: DISPFlagLocalToUnit | DISPFlagDefinition | DISPFlagOptimized, unit: !0, keyInstructions: true)
+!8 = distinct !DILocation(line: 597, column: 18, scope: !3)
+!9 = !DILocation(line: 385, column: 15, scope: !7, inlinedAt: !8, atomGroup: 57, atomRank: 2)