From 22a195485cef2bcbcdb3735dea53dea59f2110ad Mon Sep 17 00:00:00 2001
From: Philip Craig <philipjcraig@gmail.com>
Date: Fri, 22 May 2026 10:57:05 +1000
Subject: [PATCH] write/elf: improve .symtab_shndx writing (#906)

Write 0 if st_shndx is not `SHN_XINDEX`.
---
 src/write/elf/writer.rs | 8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)

diff --git a/src/write/elf/writer.rs b/src/write/elf/writer.rs
index 0b09cd5..feb18d7 100644
--- a/src/write/elf/writer.rs
+++ b/src/write/elf/writer.rs
@@ -858,9 +858,13 @@ impl<'a> Writer<'a> {
         }
 
         if self.need_symtab_shndx {
-            let section_index = sym.section.unwrap_or(SectionIndex(0));
+            let section_index = if st_shndx == elf::SHN_XINDEX {
+                sym.section.map_or(0, |s| s.0)
+            } else {
+                0
+            };
             self.symtab_shndx_data
-                .write_pod(&U32::new(self.endian, section_index.0));
+                .write_pod(&U32::new(self.endian, section_index));
         }
     }