Add `rename` field to extract configuration

Allows renaming, for example, local statics from `test$1234`
to `test` for inclusion in the source function.

src/cmd/dol.rs

@@ -296,6 +296,8 @@ pub struct ModuleConfig {
 pub struct ExtractConfig {
     /// The name of the symbol to extract.
     pub symbol: String,
+    /// Optionally rename the output symbol. (e.g. symbol$1234 -> symbol)
+    pub rename: Option<String>,
     /// If specified, the symbol's data will be extracted to the given file.
     /// Path is relative to `out_dir/bin`.
     #[serde(with = "unix_path_serde_option", default, skip_serializing_if = "Option::is_none")]
@@ -385,6 +387,7 @@ pub struct OutputModule {
 #[derive(Serialize, Deserialize, Debug, Clone, Default)]
 pub struct OutputExtract {
     pub symbol: String,
+    pub rename: Option<String>,
     #[serde(with = "unix_path_serde_option")]
     pub binary: Option<Utf8UnixPathBuf>,
     #[serde(with = "unix_path_serde_option")]
@@ -1014,7 +1017,8 @@ fn split_write_obj(
 
         if header_kind != HeaderKind::None {
             if let Some(header) = &extract.header {
-                let header_string = bin2c(symbol, section, data, header_kind);
+                let header_string =
+                    bin2c(symbol, section, data, header_kind, extract.rename.as_deref());
                 let out_path = base_dir.join("include").join(header.with_encoding());
                 if let Some(parent) = out_path.parent() {
                     DirBuilder::new().recursive(true).create(parent)?;
@@ -1026,6 +1030,7 @@ fn split_write_obj(
         // Copy to output config
         out_config.extract.push(OutputExtract {
             symbol: symbol.name.clone(),
+            rename: extract.rename.clone(),
             binary: extract.binary.clone(),
             header: extract.header.clone(),
             header_type: header_kind.to_string(),

src/util/bin2c.rs

@@ -50,15 +50,26 @@ impl fmt::Display for HeaderKind {
 }
 
 /// Converts a binary blob into a C array.
-pub fn bin2c(symbol: &ObjSymbol, section: &ObjSection, data: &[u8], kind: HeaderKind) -> String {
+pub fn bin2c(
+    symbol: &ObjSymbol,
+    section: &ObjSection,
+    data: &[u8],
+    kind: HeaderKind,
+    rename: Option<&str>,
+) -> String {
     match kind {
         HeaderKind::None => String::new(),
-        HeaderKind::Symbol => bin2c_symbol(symbol, section, data),
+        HeaderKind::Symbol => bin2c_symbol(symbol, section, data, rename),
         HeaderKind::Raw => bin2c_raw(data),
     }
 }
 
-fn bin2c_symbol(symbol: &ObjSymbol, section: &ObjSection, data: &[u8]) -> String {
+fn bin2c_symbol(
+    symbol: &ObjSymbol,
+    section: &ObjSection,
+    data: &[u8],
+    rename: Option<&str>,
+) -> String {
     let mut output = String::new();
     output.push_str(PROLOGUE);
     output.push_str(&format!(
@@ -72,7 +83,11 @@ fn bin2c_symbol(symbol: &ObjSymbol, section: &ObjSection, data: &[u8]) -> String
         output.push_str("const ");
     }
     output.push_str("unsigned char ");
+    if let Some(rename) = rename {
+        output.push_str(rename);
+    } else {
         output.push_str(symbol.demangled_name.as_deref().unwrap_or(symbol.name.as_str()));
+    }
     output.push_str(&format!("[] ATTRIBUTE_ALIGN({}) = {{", symbol.align.unwrap_or(4)));
     for (i, byte) in data.iter().enumerate() {
         if i % 16 == 0 {