From 2c57e4960f505e3d061b0eb65364d6cbd7f6a175 Mon Sep 17 00:00:00 2001
From: Luke Street <luke@street.dev>
Date: Fri, 15 Aug 2025 14:48:26 -0600
Subject: [PATCH] Add ARM logic for inferred function size padding

Resolves #237
---
 objdiff-core/src/arch/arm.rs | 16 ++++++++++++++++
 1 file changed, 16 insertions(+)

diff --git a/objdiff-core/src/arch/arm.rs b/objdiff-core/src/arch/arm.rs
index 8ce6901..b7714e1 100644
--- a/objdiff-core/src/arch/arm.rs
+++ b/objdiff-core/src/arch/arm.rs
@@ -464,6 +464,22 @@ impl Arch for ArchArm {
         }
         flags
     }
+
+    fn infer_function_size(
+        &self,
+        symbol: &Symbol,
+        section: &Section,
+        mut next_address: u64,
+    ) -> Result<u64> {
+        // Trim any trailing 4-byte zeroes from the end (padding)
+        while next_address >= symbol.address + 4
+            && let Some(data) = section.data_range(next_address - 4, 4)
+            && data == [0u8; 4]
+        {
+            next_address -= 4;
+        }
+        Ok(next_address.saturating_sub(symbol.address))
+    }
 }
 
 #[derive(Clone, Copy, Debug)]