Mess with build parameters to make component binary smaller

core-modules/client/.cargo/config.toml

@@ -0,0 +1,3 @@
+[unstable]
+build-std = ["core", "std"]
+build-std-features = ["optimize_for_size"]

core-modules/client/Cargo.toml

@@ -1,4 +1,4 @@
-cargo-features = ["trim-paths"]
+cargo-features = ["trim-paths", "panic-immediate-abort"]
 
 [package]
 name = "client"
@@ -21,6 +21,6 @@ strip = true # Strip symbols from the binary
 opt-level = "s"  # Optimize for size
 lto = true
 codegen-units = 1
-panic = "abort"
+panic = "immediate-abort"
 debug = false
 trim-paths = "all"

core-modules/client/build.sh

@@ -0,0 +1,24 @@
+OBFUSCATION_KEY=abc123abc \
+cargo build --release
+
+export BINARY=./target/release/libclient.so
+
+
+declare -a headers=(
+    ".gnu_debuglink" # - Debug information link
+    ".comment" #- Compiler version info
+    ".shstrtab" #- Section header string table (only needed by tools like readelf)
+    ".note.gnu.bu" ".note.gnu.build-id" # - Build ID note
+    ".eh_frame" ".eh_frame_hdr" # Exception handling info (can break C++ exceptions if removed)
+    ".gnu.version" ".gnu.version_r" # Symbol versioning (may be needed for some shared libraries)
+    ".gnu.hash" # Hash table for symbol lookup optimization
+)
+
+# TODO: Implement FAKE section header comments and information
+# Shuffle order of headers??
+
+for section in "${headers[@]}"
+do
+    strip --remove-section="$section" $BINARY
+    echo "Removed section header $section"
+done

core-modules/client/src/lib.rs

@@ -58,10 +58,11 @@ fn start_runtime(config: &'static RuntimeConfig) -> Result<Box<dyn ModuleRuntime
     Ok(Box::new(ClientRuntime::new(config)?))
 }
 
-pub const fn get_named_component() -> NamedComponent {
-    NamedComponent {
+#[unsafe(no_mangle)]
+pub fn get_components() -> Vec<NamedComponent> {
+    vec![NamedComponent {
         name: MODULE_NAME,
         get_interface: &get_interface,
         start_runtime: &start_runtime,
-    }
+    }]
 }