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-rw-r--r--library/std/src/sys/hermit/cmath.rs29
-rw-r--r--library/std/src/sys/hermit/mod.rs1
-rw-r--r--library/std/src/sys/sgx/cmath.rs31
-rw-r--r--library/std/src/sys/sgx/ext/arch.rs10
-rw-r--r--library/std/src/sys/sgx/mod.rs1
-rw-r--r--library/std/src/sys/unix/cmath.rs55
-rw-r--r--library/std/src/sys/unix/ext/fs.rs26
-rw-r--r--library/std/src/sys/unix/fs.rs7
-rw-r--r--library/std/src/sys/unix/mod.rs1
-rw-r--r--library/std/src/sys/unsupported/cmath.rs29
-rw-r--r--library/std/src/sys/unsupported/mod.rs1
-rw-r--r--library/std/src/sys/wasi/mod.rs2
-rw-r--r--library/std/src/sys/wasm/mod.rs2
-rw-r--r--library/std/src/sys/windows/process.rs28
14 files changed, 79 insertions, 144 deletions
diff --git a/library/std/src/sys/hermit/cmath.rs b/library/std/src/sys/hermit/cmath.rs
deleted file mode 100644
index 304cf906b2a..00000000000
--- a/library/std/src/sys/hermit/cmath.rs
+++ /dev/null
@@ -1,29 +0,0 @@
-// These symbols are all defined in `compiler-builtins`
-extern "C" {
-    pub fn acos(n: f64) -> f64;
-    pub fn acosf(n: f32) -> f32;
-    pub fn asin(n: f64) -> f64;
-    pub fn asinf(n: f32) -> f32;
-    pub fn atan(n: f64) -> f64;
-    pub fn atan2(a: f64, b: f64) -> f64;
-    pub fn atan2f(a: f32, b: f32) -> f32;
-    pub fn atanf(n: f32) -> f32;
-    pub fn cbrt(n: f64) -> f64;
-    pub fn cbrtf(n: f32) -> f32;
-    pub fn cosh(n: f64) -> f64;
-    pub fn coshf(n: f32) -> f32;
-    pub fn expm1(n: f64) -> f64;
-    pub fn expm1f(n: f32) -> f32;
-    pub fn fdim(a: f64, b: f64) -> f64;
-    pub fn fdimf(a: f32, b: f32) -> f32;
-    pub fn hypot(x: f64, y: f64) -> f64;
-    pub fn hypotf(x: f32, y: f32) -> f32;
-    pub fn log1p(n: f64) -> f64;
-    pub fn log1pf(n: f32) -> f32;
-    pub fn sinh(n: f64) -> f64;
-    pub fn sinhf(n: f32) -> f32;
-    pub fn tan(n: f64) -> f64;
-    pub fn tanf(n: f32) -> f32;
-    pub fn tanh(n: f64) -> f64;
-    pub fn tanhf(n: f32) -> f32;
-}
diff --git a/library/std/src/sys/hermit/mod.rs b/library/std/src/sys/hermit/mod.rs
index 3364d215776..0c49a6fb6de 100644
--- a/library/std/src/sys/hermit/mod.rs
+++ b/library/std/src/sys/hermit/mod.rs
@@ -20,6 +20,7 @@ use crate::os::raw::c_char;
 
 pub mod alloc;
 pub mod args;
+#[path = "../unix/cmath.rs"]
 pub mod cmath;
 pub mod condvar;
 pub mod env;
diff --git a/library/std/src/sys/sgx/cmath.rs b/library/std/src/sys/sgx/cmath.rs
deleted file mode 100644
index b89238f1da8..00000000000
--- a/library/std/src/sys/sgx/cmath.rs
+++ /dev/null
@@ -1,31 +0,0 @@
-#![cfg(not(test))]
-
-// These symbols are all defined in `compiler-builtins`
-extern "C" {
-    pub fn acos(n: f64) -> f64;
-    pub fn acosf(n: f32) -> f32;
-    pub fn asin(n: f64) -> f64;
-    pub fn asinf(n: f32) -> f32;
-    pub fn atan(n: f64) -> f64;
-    pub fn atan2(a: f64, b: f64) -> f64;
-    pub fn atan2f(a: f32, b: f32) -> f32;
-    pub fn atanf(n: f32) -> f32;
-    pub fn cbrt(n: f64) -> f64;
-    pub fn cbrtf(n: f32) -> f32;
-    pub fn cosh(n: f64) -> f64;
-    pub fn coshf(n: f32) -> f32;
-    pub fn expm1(n: f64) -> f64;
-    pub fn expm1f(n: f32) -> f32;
-    pub fn fdim(a: f64, b: f64) -> f64;
-    pub fn fdimf(a: f32, b: f32) -> f32;
-    pub fn hypot(x: f64, y: f64) -> f64;
-    pub fn hypotf(x: f32, y: f32) -> f32;
-    pub fn log1p(n: f64) -> f64;
-    pub fn log1pf(n: f32) -> f32;
-    pub fn sinh(n: f64) -> f64;
-    pub fn sinhf(n: f32) -> f32;
-    pub fn tan(n: f64) -> f64;
-    pub fn tanf(n: f32) -> f32;
-    pub fn tanh(n: f64) -> f64;
-    pub fn tanhf(n: f32) -> f32;
-}
diff --git a/library/std/src/sys/sgx/ext/arch.rs b/library/std/src/sys/sgx/ext/arch.rs
index 730db34e733..b0170e67446 100644
--- a/library/std/src/sys/sgx/ext/arch.rs
+++ b/library/std/src/sys/sgx/ext/arch.rs
@@ -32,9 +32,12 @@ pub fn egetkey(request: &Align512<[u8; 512]>) -> Result<Align16<[u8; 16]>, u32>
         let error;
 
         asm!(
+            // rbx is reserved by LLVM
+            "xchg {0}, rbx",
             "enclu",
+            "mov rbx, {0}",
+            inout(reg) request => _,
             inlateout("eax") ENCLU_EGETKEY => error,
-            in("rbx") request,
             in("rcx") out.as_mut_ptr(),
             options(nostack),
         );
@@ -60,9 +63,12 @@ pub fn ereport(
         let mut report = MaybeUninit::uninit();
 
         asm!(
+            // rbx is reserved by LLVM
+            "xchg {0}, rbx",
             "enclu",
+            "mov rbx, {0}",
+            inout(reg) targetinfo => _,
             in("eax") ENCLU_EREPORT,
-            in("rbx") targetinfo,
             in("rcx") reportdata,
             in("rdx") report.as_mut_ptr(),
             options(preserves_flags, nostack),
diff --git a/library/std/src/sys/sgx/mod.rs b/library/std/src/sys/sgx/mod.rs
index 059d6cb5ba1..bf3bd57e982 100644
--- a/library/std/src/sys/sgx/mod.rs
+++ b/library/std/src/sys/sgx/mod.rs
@@ -13,6 +13,7 @@ mod waitqueue;
 
 pub mod alloc;
 pub mod args;
+#[path = "../unix/cmath.rs"]
 pub mod cmath;
 pub mod condvar;
 pub mod env;
diff --git a/library/std/src/sys/unix/cmath.rs b/library/std/src/sys/unix/cmath.rs
index f327b69fc75..2bf80d7a4cb 100644
--- a/library/std/src/sys/unix/cmath.rs
+++ b/library/std/src/sys/unix/cmath.rs
@@ -1,32 +1,33 @@
 #![cfg(not(test))]
 
-use libc::{c_double, c_float};
+// These symbols are all defined by `libm`,
+// or by `compiler-builtins` on unsupported platforms.
 
 extern "C" {
-    pub fn acos(n: c_double) -> c_double;
-    pub fn acosf(n: c_float) -> c_float;
-    pub fn asin(n: c_double) -> c_double;
-    pub fn asinf(n: c_float) -> c_float;
-    pub fn atan(n: c_double) -> c_double;
-    pub fn atan2(a: c_double, b: c_double) -> c_double;
-    pub fn atan2f(a: c_float, b: c_float) -> c_float;
-    pub fn atanf(n: c_float) -> c_float;
-    pub fn cbrt(n: c_double) -> c_double;
-    pub fn cbrtf(n: c_float) -> c_float;
-    pub fn cosh(n: c_double) -> c_double;
-    pub fn coshf(n: c_float) -> c_float;
-    pub fn expm1(n: c_double) -> c_double;
-    pub fn expm1f(n: c_float) -> c_float;
-    pub fn fdim(a: c_double, b: c_double) -> c_double;
-    pub fn fdimf(a: c_float, b: c_float) -> c_float;
-    pub fn hypot(x: c_double, y: c_double) -> c_double;
-    pub fn hypotf(x: c_float, y: c_float) -> c_float;
-    pub fn log1p(n: c_double) -> c_double;
-    pub fn log1pf(n: c_float) -> c_float;
-    pub fn sinh(n: c_double) -> c_double;
-    pub fn sinhf(n: c_float) -> c_float;
-    pub fn tan(n: c_double) -> c_double;
-    pub fn tanf(n: c_float) -> c_float;
-    pub fn tanh(n: c_double) -> c_double;
-    pub fn tanhf(n: c_float) -> c_float;
+    pub fn acos(n: f64) -> f64;
+    pub fn acosf(n: f32) -> f32;
+    pub fn asin(n: f64) -> f64;
+    pub fn asinf(n: f32) -> f32;
+    pub fn atan(n: f64) -> f64;
+    pub fn atan2(a: f64, b: f64) -> f64;
+    pub fn atan2f(a: f32, b: f32) -> f32;
+    pub fn atanf(n: f32) -> f32;
+    pub fn cbrt(n: f64) -> f64;
+    pub fn cbrtf(n: f32) -> f32;
+    pub fn cosh(n: f64) -> f64;
+    pub fn coshf(n: f32) -> f32;
+    pub fn expm1(n: f64) -> f64;
+    pub fn expm1f(n: f32) -> f32;
+    pub fn fdim(a: f64, b: f64) -> f64;
+    pub fn fdimf(a: f32, b: f32) -> f32;
+    pub fn hypot(x: f64, y: f64) -> f64;
+    pub fn hypotf(x: f32, y: f32) -> f32;
+    pub fn log1p(n: f64) -> f64;
+    pub fn log1pf(n: f32) -> f32;
+    pub fn sinh(n: f64) -> f64;
+    pub fn sinhf(n: f32) -> f32;
+    pub fn tan(n: f64) -> f64;
+    pub fn tanf(n: f32) -> f32;
+    pub fn tanh(n: f64) -> f64;
+    pub fn tanhf(n: f32) -> f32;
 }
diff --git a/library/std/src/sys/unix/ext/fs.rs b/library/std/src/sys/unix/ext/fs.rs
index 9a982a4acd9..9cf51be2836 100644
--- a/library/std/src/sys/unix/ext/fs.rs
+++ b/library/std/src/sys/unix/ext/fs.rs
@@ -884,3 +884,29 @@ impl DirBuilderExt for fs::DirBuilder {
         self
     }
 }
+
+/// Change the root directory of the current process to the specified path.
+///
+/// This typically requires privileges, such as root or a specific capability.
+///
+/// This does not change the current working directory; you should call
+/// [`std::env::set_current_dir`][`crate::env::set_current_dir`] afterwards.
+///
+/// # Examples
+///
+/// ```no_run
+/// #![feature(unix_chroot)]
+/// use std::os::unix::fs;
+///
+/// fn main() -> std::io::Result<()> {
+///     fs::chroot("/sandbox")?;
+///     std::env::set_current_dir("/")?;
+///     // continue working in sandbox
+///     Ok(())
+/// }
+/// ```
+#[unstable(feature = "unix_chroot", issue = "84715")]
+#[cfg(not(target_os = "fuchsia"))]
+pub fn chroot<P: AsRef<Path>>(dir: P) -> io::Result<()> {
+    sys::fs::chroot(dir.as_ref())
+}
diff --git a/library/std/src/sys/unix/fs.rs b/library/std/src/sys/unix/fs.rs
index 16a7f727696..45bae25a0c3 100644
--- a/library/std/src/sys/unix/fs.rs
+++ b/library/std/src/sys/unix/fs.rs
@@ -1328,3 +1328,10 @@ pub fn copy(from: &Path, to: &Path) -> io::Result<u64> {
     })?;
     Ok(bytes_copied as u64)
 }
+
+#[cfg(not(target_os = "fuchsia"))]
+pub fn chroot(dir: &Path) -> io::Result<()> {
+    let dir = cstr(dir)?;
+    cvt(unsafe { libc::chroot(dir.as_ptr()) })?;
+    Ok(())
+}
diff --git a/library/std/src/sys/unix/mod.rs b/library/std/src/sys/unix/mod.rs
index a0ee69c2f72..6c4fbaf2734 100644
--- a/library/std/src/sys/unix/mod.rs
+++ b/library/std/src/sys/unix/mod.rs
@@ -11,6 +11,7 @@ pub mod weak;
 pub mod alloc;
 pub mod android;
 pub mod args;
+#[path = "../unix/cmath.rs"]
 pub mod cmath;
 pub mod condvar;
 pub mod env;
diff --git a/library/std/src/sys/unsupported/cmath.rs b/library/std/src/sys/unsupported/cmath.rs
deleted file mode 100644
index 304cf906b2a..00000000000
--- a/library/std/src/sys/unsupported/cmath.rs
+++ /dev/null
@@ -1,29 +0,0 @@
-// These symbols are all defined in `compiler-builtins`
-extern "C" {
-    pub fn acos(n: f64) -> f64;
-    pub fn acosf(n: f32) -> f32;
-    pub fn asin(n: f64) -> f64;
-    pub fn asinf(n: f32) -> f32;
-    pub fn atan(n: f64) -> f64;
-    pub fn atan2(a: f64, b: f64) -> f64;
-    pub fn atan2f(a: f32, b: f32) -> f32;
-    pub fn atanf(n: f32) -> f32;
-    pub fn cbrt(n: f64) -> f64;
-    pub fn cbrtf(n: f32) -> f32;
-    pub fn cosh(n: f64) -> f64;
-    pub fn coshf(n: f32) -> f32;
-    pub fn expm1(n: f64) -> f64;
-    pub fn expm1f(n: f32) -> f32;
-    pub fn fdim(a: f64, b: f64) -> f64;
-    pub fn fdimf(a: f32, b: f32) -> f32;
-    pub fn hypot(x: f64, y: f64) -> f64;
-    pub fn hypotf(x: f32, y: f32) -> f32;
-    pub fn log1p(n: f64) -> f64;
-    pub fn log1pf(n: f32) -> f32;
-    pub fn sinh(n: f64) -> f64;
-    pub fn sinhf(n: f32) -> f32;
-    pub fn tan(n: f64) -> f64;
-    pub fn tanf(n: f32) -> f32;
-    pub fn tanh(n: f64) -> f64;
-    pub fn tanhf(n: f32) -> f32;
-}
diff --git a/library/std/src/sys/unsupported/mod.rs b/library/std/src/sys/unsupported/mod.rs
index 32ca68ef15b..3ef4c6b8a8f 100644
--- a/library/std/src/sys/unsupported/mod.rs
+++ b/library/std/src/sys/unsupported/mod.rs
@@ -2,6 +2,7 @@
 
 pub mod alloc;
 pub mod args;
+#[path = "../unix/cmath.rs"]
 pub mod cmath;
 pub mod condvar;
 pub mod env;
diff --git a/library/std/src/sys/wasi/mod.rs b/library/std/src/sys/wasi/mod.rs
index 2584d35b6ef..37f74fcc052 100644
--- a/library/std/src/sys/wasi/mod.rs
+++ b/library/std/src/sys/wasi/mod.rs
@@ -20,7 +20,7 @@ use crate::mem;
 #[path = "../unix/alloc.rs"]
 pub mod alloc;
 pub mod args;
-#[path = "../unsupported/cmath.rs"]
+#[path = "../unix/cmath.rs"]
 pub mod cmath;
 #[path = "../unsupported/condvar.rs"]
 pub mod condvar;
diff --git a/library/std/src/sys/wasm/mod.rs b/library/std/src/sys/wasm/mod.rs
index 8705910c73a..afcc5ca9286 100644
--- a/library/std/src/sys/wasm/mod.rs
+++ b/library/std/src/sys/wasm/mod.rs
@@ -18,7 +18,7 @@
 
 pub mod alloc;
 pub mod args;
-#[path = "../unsupported/cmath.rs"]
+#[path = "../unix/cmath.rs"]
 pub mod cmath;
 pub mod env;
 #[path = "../unsupported/fs.rs"]
diff --git a/library/std/src/sys/windows/process.rs b/library/std/src/sys/windows/process.rs
index 30bbfdd0dd1..a5799606142 100644
--- a/library/std/src/sys/windows/process.rs
+++ b/library/std/src/sys/windows/process.rs
@@ -19,9 +19,9 @@ use crate::sys::c;
 use crate::sys::cvt;
 use crate::sys::fs::{File, OpenOptions};
 use crate::sys::handle::Handle;
-use crate::sys::mutex::Mutex;
 use crate::sys::pipe::{self, AnonPipe};
 use crate::sys::stdio;
+use crate::sys_common::mutex::StaticMutex;
 use crate::sys_common::process::{CommandEnv, CommandEnvs};
 use crate::sys_common::AsInner;
 
@@ -94,10 +94,6 @@ pub struct StdioPipes {
     pub stderr: Option<AnonPipe>,
 }
 
-struct DropGuard<'a> {
-    lock: &'a Mutex,
-}
-
 impl Command {
     pub fn new(program: &OsStr) -> Command {
         Command {
@@ -209,8 +205,9 @@ impl Command {
         //
         // For more information, msdn also has an article about this race:
         // http://support.microsoft.com/kb/315939
-        static CREATE_PROCESS_LOCK: Mutex = Mutex::new();
-        let _guard = DropGuard::new(&CREATE_PROCESS_LOCK);
+        static CREATE_PROCESS_LOCK: StaticMutex = StaticMutex::new();
+
+        let _guard = unsafe { CREATE_PROCESS_LOCK.lock() };
 
         let mut pipes = StdioPipes { stdin: None, stdout: None, stderr: None };
         let null = Stdio::Null;
@@ -259,23 +256,6 @@ impl fmt::Debug for Command {
     }
 }
 
-impl<'a> DropGuard<'a> {
-    fn new(lock: &'a Mutex) -> DropGuard<'a> {
-        unsafe {
-            lock.lock();
-            DropGuard { lock }
-        }
-    }
-}
-
-impl<'a> Drop for DropGuard<'a> {
-    fn drop(&mut self) {
-        unsafe {
-            self.lock.unlock();
-        }
-    }
-}
-
 impl Stdio {
     fn to_handle(&self, stdio_id: c::DWORD, pipe: &mut Option<AnonPipe>) -> io::Result<Handle> {
         match *self {
generated by cgit-pink 1.4.1-3-g733a5 (git 2.37.1) at 2025-11-17 19:10:24 +0000