util/noaslr porting to FreeBSD (the non-lib part). (#1337)

to port to the library, might need a nice layer over the FreeBSD's C api (nix?)
before hand.

utils/noaslr/demo/build.rs

@@ -1,4 +1,6 @@
-use {std::error::Error, vergen::EmitBuilder};
+use std::error::Error;
+
+use vergen::EmitBuilder;
 
 fn main() -> Result<(), Box<dyn Error>> {
     EmitBuilder::builder()

utils/noaslr/demo/src/main.rs

@@ -1,16 +1,16 @@
 mod args;
 
-use {
+use std::{
-    crate::args::Args,
+    env,
-    anyhow::{anyhow, Result},
+    fs::File,
-    clap::Parser,
+    io::{BufRead, BufReader},
-    std::{
-        env,
-        fs::File,
-        io::{BufRead, BufReader},
-    },
 };
 
+use anyhow::{anyhow, Result};
+use clap::Parser;
+
+use crate::args::Args;
+
 fn main() -> Result<()> {
     let args = Args::parse();
     for (i, a) in env::args().enumerate() {

utils/noaslr/libnoaslr/src/lib.rs

@@ -1,3 +1,4 @@
+#[cfg(any(target_os = "linux", target_os = "android"))]
 use {
     anyhow::{anyhow, Result},
     ctor::ctor,
@@ -8,6 +9,7 @@ use {
     std::{ffi::CString, fs::File, io::Read},
 };
 
+#[cfg(any(target_os = "linux", target_os = "android"))]
 fn read_null_lines(path: &str) -> Result<Vec<CString>> {
     let mut file = File::open(path).map_err(|e| anyhow!("Failed to open maps: {e:}"))?;
     let mut data = String::new();
@@ -20,6 +22,7 @@ fn read_null_lines(path: &str) -> Result<Vec<CString>> {
         .collect::<Result<Vec<CString>>>()
 }
 
+#[cfg(any(target_os = "linux", target_os = "android"))]
 fn libnoaslr() -> Result<()> {
     let mut persona = personality::get().map_err(|e| anyhow!("Failed to get personality: {e:}"))?;
     if (persona & Persona::ADDR_NO_RANDOMIZE) == Persona::ADDR_NO_RANDOMIZE {
@@ -36,6 +39,7 @@ fn libnoaslr() -> Result<()> {
     Ok(())
 }
 
+#[cfg(any(target_os = "linux", target_os = "android"))]
 #[ctor]
 fn init() {
     libnoaslr().unwrap();

utils/noaslr/noaslr/Cargo.toml

@@ -13,3 +13,4 @@ log = { version = "0.4.19", default-features = false }
 nix = { version = "0.26.2", default-features = false, features = ["process", "personality"] }
 readonly = { version = "0.2.8", default-features = false }
 simplelog = { version = "0.12.1", default-features = false }
+libc = "0.2"

utils/noaslr/noaslr/build.rs

@@ -1,4 +1,6 @@
-use {std::error::Error, vergen::EmitBuilder};
+use std::error::Error;
+
+use vergen::EmitBuilder;
 
 fn main() -> Result<(), Box<dyn Error>> {
     EmitBuilder::builder()

utils/noaslr/noaslr/src/args.rs

@@ -1,7 +1,6 @@
-use {
+use std::iter;
-    clap::{builder::Str, Parser},
+
-    std::iter,
+use clap::{builder::Str, Parser};
-};
 
 #[derive(Default)]
 pub struct Version;

utils/noaslr/noaslr/src/main.rs

@@ -1,5 +1,14 @@
 mod args;
 
+#[cfg(not(any(target_os = "linux", target_os = "android")))]
+use {
+    crate::args::Args,
+    anyhow::{anyhow, Result},
+    clap::Parser,
+    nix::unistd::execvp,
+    std::ffi::CString,
+};
+#[cfg(any(target_os = "linux", target_os = "android"))]
 use {
     crate::args::Args,
     anyhow::{anyhow, Result},
@@ -11,11 +20,35 @@ use {
     std::ffi::CString,
 };
 
-fn main() -> Result<()> {
+#[cfg(any(target_os = "linux", target_os = "android"))]
-    let args = Args::parse();
+fn disable_aslr() -> Result<()> {
     let mut persona = personality::get().map_err(|e| anyhow!("Failed to get personality: {e:}"))?;
     persona |= Persona::ADDR_NO_RANDOMIZE;
     personality::set(persona).map_err(|e| anyhow!("Failed to set personality: {e:}"))?;
+    Ok(())
+}
+
+#[cfg(not(any(target_os = "linux", target_os = "android")))]
+fn disable_aslr() -> Result<()> {
+    let mut status = libc::PROC_ASLR_FORCE_DISABLE;
+    let r = unsafe {
+        libc::procctl(
+            libc::P_PID,
+            0,
+            libc::PROC_ASLR_CTL,
+            &mut status as *mut i32 as *mut libc::c_void,
+        )
+    };
+    if r < 0 {
+        return Err(anyhow!("Failed to set aslr control"));
+    }
+    Ok(())
+}
+
+fn main() -> Result<()> {
+    let args = Args::parse();
+
+    disable_aslr()?;
 
     let cargs = args
         .argv()