Update libc crate to 0.2.30

Import subrepo libc/:libc at 3520512a8c9cb55661910318a6fb169a75c02a59

1 files changed, 46 insertions, 0 deletions

diff --git a/libc/src/unix/uclibc/x86_64/l4re.rs b/libc/src/unix/uclibc/x86_64/l4re.rs
new file mode 100644
index 0000000..f047a82
--- /dev/null
+++ b/libc/src/unix/uclibc/x86_64/l4re.rs
@@ -0,0 +1,46 @@
+/// L4Re specifics
+/// This module contains definitions required by various L4Re libc backends.
+/// Some of them are formally not part of the libc, but are a dependency of the
+/// libc and hence we should provide them here.
+
+pub type l4_umword_t = ::c_ulong; // Unsigned machine word.
+
+s! {
+    /// CPU sets.
+    pub struct l4_sched_cpu_set_t {
+        // from the L4Re docs
+        /// Combination of granularity and offset.
+        ///
+        /// The granularity defines how many CPUs each bit in map describes.
+        /// The offset is the numer of the first CPU described by the first
+        /// bit in the bitmap.
+        /// offset must be a multiple of 2^graularity.
+        ///
+        /// | MSB              |                 LSB |
+        /// | ---------------- | ------------------- |
+        /// | 8bit granularity | 24bit offset ..     |
+        gran_offset: l4_umword_t ,
+        /// Bitmap of CPUs.
+        map: l4_umword_t ,
+    }
+}
+
+#[cfg(target_os = "l4re")]
+pub struct pthread_attr_t {
+    pub __detachstate: ::c_int,
+    pub __schedpolicy: ::c_int,
+    pub __schedparam: super::__sched_param,
+    pub __inheritsched: ::c_int,
+    pub __scope: ::c_int,
+    pub __guardsize: ::size_t,
+    pub __stackaddr_set: ::c_int,
+    pub __stackaddr: *mut ::c_void, // better don't use it
+    pub __stacksize: ::size_t,
+    // L4Re specifics
+    pub affinity: l4_sched_cpu_set_t,
+    pub create_flags: ::c_uint,
+}
+
+// L4Re requires a min stack size of 64k; that isn't defined in uClibc, but
+// somewhere in the core libraries. uClibc wants 16k, but that's not enough.
+pub const PTHREAD_STACK_MIN: usize = 65536;