Make stripping ELF optional for QEMU direct boot

OSDK.toml

@@ -27,6 +27,7 @@ args = "$(./tools/qemu_args.sh test)"
 
 [scheme."microvm"]
 boot.method = "qemu-direct"
+build.strip_elf = true
 qemu.args = "$(./tools/qemu_args.sh microvm)"
 
 [scheme."iommu"]

docs/src/osdk/reference/commands/build.md

@@ -54,6 +54,8 @@ To display the GRUB menu if booting with GRUB
 Path of QEMU
 - `--qemu-args <ARGS>`:
 Extra arguments for running QEMU
+- `--strip-elf`:
+Whether to strip the built kernel ELF using `rust-strip`
 
 ## Examples
 

docs/src/osdk/reference/manifest.md

@@ -43,6 +43,7 @@ supported_archs = ["x86_64"]# List of strings, that the arch the schema can appl
 [build]
 features = []               # List of strings, the same as Cargo
 profile = "dev"             # String, the same as Cargo
+strip_elf = false           # Whether to strip the built kernel ELF using `rust-strip`
 [boot]
 method = "qemu-direct"      # "grub-rescue-iso"/"qemu-direct"/"grub-qcow2"
 kcmd_args = []              # <1>

osdk/src/cli.rs

@@ -264,6 +264,12 @@ pub struct CommonArgs {
         global = true
     )]
     pub linux_x86_legacy_boot: bool,
+    #[arg(
+        long = "strip-elf",
+        help = "Strip the built kernel ELF file for a smaller size",
+        global = true
+    )]
+    pub strip_elf: bool,
     #[arg(
         long = "target-arch",
         value_name = "ARCH",

osdk/src/commands/build/bin.rs

@@ -68,8 +68,8 @@ pub fn make_install_bzimage(
     )
 }
 
-pub fn strip_elf_for_qemu(install_dir: impl AsRef<Path>, elf: &AsterBin) -> AsterBin {
-    let stripped_elf_path = {
+pub fn make_elf_for_qemu(install_dir: impl AsRef<Path>, elf: &AsterBin, strip: bool) -> AsterBin {
+    let result_elf_path = {
         let elf_name = elf
             .path()
             .file_name()
@@ -77,14 +77,15 @@ pub fn strip_elf_for_qemu(install_dir: impl AsRef<Path>, elf: &AsterBin) -> Aste
             .to_str()
             .unwrap()
             .to_string();
-        install_dir.as_ref().join(elf_name + ".stripped.elf")
+        install_dir.as_ref().join(elf_name + ".qemu_elf")
     };
 
+    if strip {
         // We use rust-strip to reduce the kernel image size.
         let status = Command::new("rust-strip")
             .arg(elf.path())
             .arg("-o")
-        .arg(stripped_elf_path.as_os_str())
+            .arg(result_elf_path.as_os_str())
             .status();
 
         match status {
@@ -101,6 +102,10 @@ pub fn strip_elf_for_qemu(install_dir: impl AsRef<Path>, elf: &AsterBin) -> Aste
                 _ => panic!("Strip kernel elf failed, err:{:#?}", err),
             },
         }
+    } else {
+        // Copy the ELF file.
+        std::fs::copy(elf.path(), &result_elf_path).unwrap();
+    }
 
     // Because QEMU denies a x86_64 multiboot ELF file (GRUB2 accept it, btw),
     // modify `em_machine` to pretend to be an x86 (32-bit) ELF image,
@@ -110,7 +115,7 @@ pub fn strip_elf_for_qemu(install_dir: impl AsRef<Path>, elf: &AsterBin) -> Aste
     let mut file = OpenOptions::new()
         .read(true)
         .write(true)
-        .open(&stripped_elf_path)
+        .open(&result_elf_path)
         .unwrap();
 
     let bytes: [u8; 2] = [0x03, 0x00];
@@ -120,7 +125,7 @@ pub fn strip_elf_for_qemu(install_dir: impl AsRef<Path>, elf: &AsterBin) -> Aste
     file.flush().unwrap();
 
     AsterBin::new(
-        &stripped_elf_path,
+        &result_elf_path,
         AsterBinType::Elf(AsterElfMeta {
             has_linux_header: false,
             has_pvh_header: false,
@@ -128,7 +133,7 @@ pub fn strip_elf_for_qemu(install_dir: impl AsRef<Path>, elf: &AsterBin) -> Aste
             has_multiboot2_header: true,
         }),
         elf.version().clone(),
-        true,
+        strip,
     )
 }
 

osdk/src/commands/build/mod.rs

@@ -10,7 +10,7 @@ use std::{
     time::{Duration, SystemTime},
 };
 
-use bin::strip_elf_for_qemu;
+use bin::make_elf_for_qemu;
 
 use super::util::{cargo, profile_name_adapter, COMMON_CARGO_ARGS, DEFAULT_TARGET_RELPATH};
 use crate::{
@@ -169,10 +169,11 @@ pub fn do_build(
                 action,
             );
             bundle.consume_vm_image(bootdev_image);
+            bundle.consume_aster_bin(aster_elf);
         }
         BootMethod::QemuDirect => {
-            let stripped_elf = strip_elf_for_qemu(&osdk_output_directory, &aster_elf);
-            bundle.consume_aster_bin(stripped_elf);
+            let qemu_elf = make_elf_for_qemu(&osdk_output_directory, &aster_elf, build.strip_elf);
+            bundle.consume_aster_bin(qemu_elf);
         }
         BootMethod::GrubQcow2 => {
             todo!()

osdk/src/config/scheme/action.rs

@@ -13,6 +13,7 @@ pub enum ActionChoice {
 #[derive(Debug, Default, Clone, PartialEq, Eq, Serialize, Deserialize)]
 pub struct BuildScheme {
     pub profile: Option<String>,
+    #[serde(default)]
     pub features: Vec<String>,
     #[serde(default)]
     pub no_default_features: bool,
@@ -20,11 +21,14 @@ pub struct BuildScheme {
     /// [Linux legacy x86 32-bit boot protocol](https://www.kernel.org/doc/html/v5.6/x86/boot.html)
     #[serde(default)]
     pub linux_x86_legacy_boot: bool,
+    #[serde(default)]
+    pub strip_elf: bool,
 }
 
 #[derive(Debug, Clone, PartialEq, Eq, Serialize, Deserialize)]
 pub struct Build {
     pub profile: String,
+    #[serde(default)]
     pub features: Vec<String>,
     #[serde(default)]
     pub no_default_features: bool,
@@ -32,6 +36,8 @@ pub struct Build {
     pub override_configs: Vec<String>,
     #[serde(default)]
     pub linux_x86_legacy_boot: bool,
+    #[serde(default)]
+    pub strip_elf: bool,
 }
 
 impl Default for Build {
@@ -42,6 +48,7 @@ impl Default for Build {
             no_default_features: false,
             override_configs: Vec::new(),
             linux_x86_legacy_boot: false,
+            strip_elf: false,
         }
     }
 }
@@ -61,6 +68,9 @@ impl Build {
         if common_args.linux_x86_legacy_boot {
             self.linux_x86_legacy_boot = true;
         }
+        if common_args.strip_elf {
+            self.strip_elf = true;
+        }
     }
 }
 
@@ -74,10 +84,13 @@ impl BuildScheme {
             features.extend(self.features.clone());
             features
         };
-        // no_default_features is not inherited
+        // `no_default_features` is not inherited
         if parent.linux_x86_legacy_boot {
             self.linux_x86_legacy_boot = true;
         }
+        if parent.strip_elf {
+            self.strip_elf = true;
+        }
     }
 
     pub fn finalize(self) -> Build {
@@ -87,6 +100,7 @@ impl BuildScheme {
             no_default_features: self.no_default_features,
             override_configs: Vec::new(),
             linux_x86_legacy_boot: self.linux_x86_legacy_boot,
+            strip_elf: self.strip_elf,
         }
     }
 }