main_process: read elf file

tools/polkatool/src/main.rs

@@ -62,6 +62,8 @@ enum Args {
         /// The input files.
         inputs: Vec<PathBuf>,
     },
+
+    Process,
 }
 
 macro_rules! bail {
@@ -90,6 +92,7 @@ fn main() {
         } => main_disassemble(input, format, display_gas, show_raw_bytes, output),
         Args::Assemble { input, output } => main_assemble(input, output),
         Args::Stats { inputs } => main_stats(inputs),
+        Args::Process => main_process(),  // New match arm
     };
 
     if let Err(error) = result {
@@ -233,3 +236,28 @@ fn main_assemble(input_path: PathBuf, output_path: PathBuf) -> Result<(), String
 
     Ok(())
 }
+
+fn main_process() -> Result<(), String> {
+    use std::fs;
+
+    let mut config = polkavm_linker::Config::default();
+    config.set_strip(true);
+    config.set_dispatch_table(vec![
+        b"is_authorized_ext".into(),
+        b"refine_ext".into(),
+        b"accumulate_ext".into(),
+        b"on_transfer_ext".into(),
+    ]);
+
+    let elf = fs::read("../../../guest-programs/jam-service-fib/custom-target/riscv32ema-unknown-none-elf/release/jam-service-fib")
+        .map_err(|err| format!("Failed to read ELF file: {}", err))?;
+    let raw_blob = polkavm_linker::program_from_elf(config, elf.as_ref())
+        .map_err(|err| format!("Failed to create program from ELF: {}", err))?;
+    let parts = polkavm_linker::ProgramParts::from_bytes(raw_blob.into())
+        .map_err(|err| format!("Failed to parse program parts: {}", err))?;
+
+    fs::write("blob.pvm", &parts.code_and_jump_table)
+        .map_err(|err| format!("Failed to write blob.pvm: {}", err))?;
+
+    Ok(())
+}