a.diff

diff --git a/src/write/macho.rs b/src/write/macho.rs
index dbbe5df..48f7b6b 100644
--- a/src/write/macho.rs
+++ b/src/write/macho.rs
@@ -137,6 +137,17 @@ impl Object {
         let mut strtab = StringTable::default();
         let mut symbol_offsets = vec![SymbolOffsets::default(); self.symbols.len()];
         let mut nsyms = 0;
+
+        let prefixed_symbols: Vec<_> = self
+            .symbols
+            .iter()
+            .map(|symbol| {
+                let mut prefixed = Vec::with_capacity(1 + symbol.name.len());
+                prefixed.push(0x5f);
+                prefixed.extend_from_slice(&symbol.name);
+                prefixed
+            })
+            .collect();
         for (index, symbol) in self.symbols.iter().enumerate() {
             if !symbol.is_undefined() {
                 match symbol.kind {
@@ -148,7 +159,11 @@ impl Object {
             symbol_offsets[index].index = nsyms;
             nsyms += 1;
             if !symbol.name.is_empty() {
-                symbol_offsets[index].str_id = Some(strtab.add(&symbol.name));
+                symbol_offsets[index].str_id = if symbol.is_local() {
+                    Some(strtab.add(&symbol.name))
+                } else {
+                    Some(strtab.add(&prefixed_symbols[index]))
+                };
             }
         }
 
@@ -406,6 +421,9 @@ impl Object {
                             (RelocationKind::Relative, RelocationEncoding::X86Branch, -4) => {
                                 (1, mach::X86_64_RELOC_BRANCH)
                             }
+                            (RelocationKind::Relative, RelocationEncoding::Generic, -4) => {
+                                (1, mach::X86_64_RELOC_SIGNED)
+                            }
                             (RelocationKind::PltRelative, RelocationEncoding::X86Branch, -4) => {
                                 (1, mach::X86_64_RELOC_BRANCH)
                             }