Update LoongArch64 support for lazy binding. (#19)

Author: lxyhit

.github/workflows/rust.yml

@@ -25,7 +25,7 @@ jobs:
       run: sh ci/run.sh
     strategy:
       matrix:
-        target: [ x86_64-unknown-linux-gnu, aarch64-unknown-linux-gnu, riscv64gc-unknown-linux-gnu]
+        target: [ x86_64-unknown-linux-gnu, aarch64-unknown-linux-gnu, riscv64gc-unknown-linux-gnu, loongarch64-unknown-linux-gnu]
         channel: [ 1.88.0, stable ]
         features: [ "use-syscall", "version", "log" ]
 
@@ -44,7 +44,7 @@ jobs:
       run: sh ci/run.sh
     strategy:
       matrix:
-        target: [ x86_64-unknown-linux-gnu, aarch64-unknown-linux-gnu, riscv64gc-unknown-linux-gnu]
+        target: [ x86_64-unknown-linux-gnu, aarch64-unknown-linux-gnu, riscv64gc-unknown-linux-gnu, loongarch64-unknown-linux-gnu]
         channel: [ 1.88.0, stable ]
         features: [ "use-syscall" ]
 

Cargo.lock

@@ -23,7 +23,7 @@ rust-version = "1.88.0"
 members = ["crates/windows-elf-loader", "crates/mini-loader"]
 
 [workspace.dependencies]
-syscalls = { version = "0.6.18", default-features = false }
+syscalls = { version = "0.7.0", default-features = false }
 elf = { version = "0.8", default-features = false }
 cfg-if = '1.0'
 

Cargo.toml

@@ -122,7 +122,7 @@ Disable the `use-syscall` feature if you don't have an operating system.
 | aarch64     | ✅       | ✅            | ✅(CI)     |
 | riscv64     | ✅       | ✅            | ✅(CI)     |
 | riscv32     | ✅       | ✅            | ✅(Manual) |
-| loongarch64 | ✅       | ❌            | ✅(Manual) |
+| loongarch64 | ✅       | ✅            | ✅(CI) |
 | x86         | ✅       | ✅            | ✅(CI)     |
 | arm         | ✅       | ✅            | ✅(CI)     |
 

README.md

@@ -118,7 +118,7 @@ Found 11 outliers among 100 measurements (11.00%)
 | aarch64     | ✅    | ✅        | ✅(CI)      |
 | riscv64     | ✅    | ✅        | ✅(CI)      |
 | riscv32     | ✅    | ✅        | ✅(Manual)  |
-| loongarch64 | ✅    | ❌        | ✅(Manual ) |
+| loongarch64 | ✅    | ✅        | ✅(CI) |
 | x86         | ✅    | ✅        | ✅(CI)      |
 | arm         | ✅    | ✅        | ✅(CI)      |
 

README_zh.md

@@ -14,7 +14,7 @@ fn compile_dylib(target: &String) {
             .arg("-C")
             .arg("panic=abort")
             .arg("-C")
-            .arg("linker=lld")
+            .arg("linker=rust-lld")
             .arg(format!("{}/{}", DYLIB_DIR_PATH, name))
             .arg("--out-dir")
             .arg("target");

build.rs

@@ -31,6 +31,36 @@ pub(crate) const RESOLVE_FUNCTION_OFFSET: usize = 0;
 pub extern "C" fn dl_runtime_resolve() {
     core::arch::naked_asm!(
         "
+        addi.d  $sp, $sp, -9*8
+        st.d    $ra, $sp, 0
+        st.d    $a0, $sp, 8
+        st.d    $a1, $sp, 16
+        st.d    $a2, $sp, 24
+        st.d    $a3, $sp, 32
+        st.d    $a4, $sp, 40
+        st.d    $a5, $sp, 48
+        st.d    $a6, $sp, 56
+        st.d    $a7, $sp, 64
+
+        move    $a0, $t0
+        srli.d  $a1, $t1, 3
+        bl    dl_fixup
+
+        move    $t0, $a0
+
+        ld.d    $ra, $sp, 0
+        ld.d    $a0, $sp, 8
+        ld.d    $a1, $sp, 16
+        ld.d    $a2, $sp, 24
+        ld.d    $a3, $sp, 32
+        ld.d    $a4, $sp, 40
+        ld.d    $a5, $sp, 48
+        ld.d    $a6, $sp, 56
+        ld.d    $a7, $sp, 64
+
+        addi.d  $sp, $sp, 9*8
+
+        jr      $t0
 	"
     )
 }

src/arch/loongarch64.rs

@@ -264,9 +264,6 @@ pub(crate) fn prepare_lazy_bind(got: *mut usize, dylib: usize) {
         got.add(RESOLVE_FUNCTION_OFFSET)
             .write(dl_runtime_resolve as usize);
     }
-
-    #[cfg(target_arch = "loongarch64")]
-    unimplemented!()
 }
 
 #[cfg(not(feature = "rel"))]

src/arch/mod.rs

@@ -191,14 +191,14 @@ impl RawFile {
     pub(crate) fn from_path(path: &str) -> Result<Self> {
         const RDONLY: u32 = 0;
         let name = CString::from_str(path).unwrap().to_owned();
-        #[cfg(not(any(target_arch = "aarch64", target_arch = "riscv64")))]
+        #[cfg(not(any(target_arch = "aarch64", target_arch = "riscv64", target_arch = "loongarch64")))]
         let fd = unsafe {
             from_io_ret(
                 syscalls::raw_syscall!(Sysno::open, name.as_ptr(), RDONLY, 0),
                 "open failed",
             )?
         };
-        #[cfg(any(target_arch = "aarch64", target_arch = "riscv64"))]
+        #[cfg(any(target_arch = "aarch64", target_arch = "riscv64", target_arch = "loongarch64"))]
         let fd = unsafe {
             const AT_FDCWD: core::ffi::c_int = -100;
             from_io_ret(