Use Rust elf-cleaner implementation

tools/elf-cleaner/.gitignore

@@ -0,0 +1 @@
+/target

tools/elf-cleaner/Cargo.lock

@@ -0,0 +1,133 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+version = 4
+
+[[package]]
+name = "adler2"
+version = "2.0.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "512761e0bb2578dd7380c6baaa0f4ce03e84f95e960231d1dec8bf4d7d6e2627"
+
+[[package]]
+name = "anyhow"
+version = "1.0.97"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "dcfed56ad506cb2c684a14971b8861fdc3baaaae314b9e5f9bb532cbe3ba7a4f"
+
+[[package]]
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+version = "1.0.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "baf1de4339761588bc0619e3cbc0120ee582ebb74b53b4efbf79117bd2da40fd"
+
+[[package]]
+name = "crc32fast"
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+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "a97769d94ddab943e4510d138150169a2758b5ef3eb191a9ee688de3e23ef7b3"
+dependencies = [
+ "cfg-if",
+]
+
+[[package]]
+name = "elf-cleaner"
+version = "0.0.0"
+dependencies = [
+ "anyhow",
+ "object",
+]
+
+[[package]]
+name = "equivalent"
+version = "1.0.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "877a4ace8713b0bcf2a4e7eec82529c029f1d0619886d18145fea96c3ffe5c0f"
+
+[[package]]
+name = "flate2"
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+checksum = "11faaf5a5236997af9848be0bef4db95824b1d534ebc64d0f0c6cf3e67bd38dc"
+dependencies = [
+ "crc32fast",
+ "miniz_oxide",
+]
+
+[[package]]
+name = "foldhash"
+version = "0.1.5"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "d9c4f5dac5e15c24eb999c26181a6ca40b39fe946cbe4c263c7209467bc83af2"
+
+[[package]]
+name = "hashbrown"
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+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "bf151400ff0baff5465007dd2f3e717f3fe502074ca563069ce3a6629d07b289"
+dependencies = [
+ "foldhash",
+]
+
+[[package]]
+name = "indexmap"
+version = "2.8.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "3954d50fe15b02142bf25d3b8bdadb634ec3948f103d04ffe3031bc8fe9d7058"
+dependencies = [
+ "equivalent",
+ "hashbrown",
+]
+
+[[package]]
+name = "memchr"
+version = "2.7.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "78ca9ab1a0babb1e7d5695e3530886289c18cf2f87ec19a575a0abdce112e3a3"
+
+[[package]]
+name = "miniz_oxide"
+version = "0.8.5"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "8e3e04debbb59698c15bacbb6d93584a8c0ca9cc3213cb423d31f760d8843ce5"
+dependencies = [
+ "adler2",
+]
+
+[[package]]
+name = "object"
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+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "62948e14d923ea95ea2c7c86c71013138b66525b86bdc08d2dcc262bdb497b87"
+dependencies = [
+ "crc32fast",
+ "flate2",
+ "hashbrown",
+ "indexmap",
+ "memchr",
+ "ruzstd",
+]
+
+[[package]]
+name = "ruzstd"
+version = "0.7.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "fad02996bfc73da3e301efe90b1837be9ed8f4a462b6ed410aa35d00381de89f"
+dependencies = [
+ "twox-hash",
+]
+
+[[package]]
+name = "static_assertions"
+version = "1.1.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
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+
+[[package]]
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+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "97fee6b57c6a41524a810daee9286c02d7752c4253064d0b05472833a438f675"
+dependencies = [
+ "cfg-if",
+ "static_assertions",
+]

tools/elf-cleaner/Cargo.toml

@@ -0,0 +1,13 @@
+[package]
+name = "elf-cleaner"
+version = "0.0.0"
+edition = "2024"
+
+[dependencies]
+object = { version = "0.36", features = ["build"] }
+anyhow = "1.0"
+
+[profile.release]
+strip = true
+lto = true
+codegen-units = 1

tools/elf-cleaner/src/main.rs

@@ -0,0 +1,85 @@
+use object::build::elf::{Builder, Dynamic, SectionData};
+use object::elf;
+use std::{env, fs};
+
+// Implementation adapted from https://github.com/termux/termux-elf-cleaner
+
+// Missing ELF constants
+const DT_AARCH64_BTI_PLT: u32 = elf::DT_LOPROC + 1;
+const DT_AARCH64_PAC_PLT: u32 = elf::DT_LOPROC + 3;
+const DT_AARCH64_VARIANT_PCS: u32 = elf::DT_LOPROC + 5;
+
+const SUPPORTED_DT_FLAGS: u32 = elf::DF_1_NOW | elf::DF_1_GLOBAL;
+
+fn print_remove_dynamic(name: &str, path: &str) {
+    println!("Removing dynamic section entry {} in '{}'", name, path);
+}
+
+fn process_elf(path: &str) -> anyhow::Result<()> {
+    let bytes = fs::read(path)?;
+    let mut elf = Builder::read(bytes.as_slice())?;
+    let is_aarch64 = elf.header.e_machine == elf::EM_AARCH64;
+
+    elf.sections.iter_mut().for_each(|section| {
+        if let SectionData::Dynamic(entries) = &mut section.data {
+            // Remove unsupported entries
+            entries.retain(|e| {
+                let tag = e.tag();
+                match tag {
+                    elf::DT_RPATH => {
+                        print_remove_dynamic("DT_RPATH", path);
+                        return false;
+                    }
+                    elf::DT_RUNPATH => {
+                        print_remove_dynamic("DT_RUNPATH", path);
+                        return false;
+                    }
+                    _ => {}
+                }
+                if is_aarch64 {
+                    match tag {
+                        DT_AARCH64_BTI_PLT => {
+                            print_remove_dynamic("DT_AARCH64_BTI_PLT", path);
+                            return false;
+                        }
+                        DT_AARCH64_PAC_PLT => {
+                            print_remove_dynamic("DT_AARCH64_PAC_PLT", path);
+                            return false;
+                        }
+                        DT_AARCH64_VARIANT_PCS => {
+                            print_remove_dynamic("DT_AARCH64_VARIANT_PCS", path);
+                            return false;
+                        }
+                        _ => {}
+                    }
+                }
+                true
+            });
+            // Remove unsupported flags
+            for entry in entries.iter_mut() {
+                if let Dynamic::Integer { tag, val } = entry {
+                    if *tag == elf::DT_FLAGS_1 {
+                        let new_flags = *val & SUPPORTED_DT_FLAGS as u64;
+                        if new_flags != *val {
+                            println!(
+                                "Replacing unsupported DT_FLAGS_1 {:#x} with {:#x} in '{}'",
+                                *val, new_flags, path
+                            );
+                            *val = new_flags;
+                        }
+                        break;
+                    }
+                }
+            }
+        }
+    });
+
+    let mut out_bytes = Vec::new();
+    elf.write(&mut out_bytes)?;
+    fs::write(path, &out_bytes)?;
+    Ok(())
+}
+
+fn main() -> anyhow::Result<()> {
+    env::args().skip(1).try_for_each(|s| process_elf(&s))
+}

tools/rustup-wrapper/Cargo.lock

@@ -12,7 +12,7 @@ dependencies = [
 ]
 
 [[package]]
-name = "rustup_wrapper"
+name = "rustup-wrapper"
 version = "0.0.0"
 dependencies = [
  "home",

tools/rustup-wrapper/Cargo.toml

@@ -1,7 +1,7 @@
 [package]
-name = "rustup_wrapper"
+name = "rustup-wrapper"
 version = "0.0.0"
-edition = "2021"
+edition = "2024"
 
 [dependencies]
 home = "0.5"