Adding upstream version 115.7.0esr.upstream/115.7.0esr

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

29 files changed, 3956 insertions, 0 deletions

diff --git a/third_party/rust/redox_syscall/.cargo-checksum.json b/third_party/rust/redox_syscall/.cargo-checksum.json
new file mode 100644
index 0000000000..9c62b65217
--- /dev/null
+++ b/third_party/rust/redox_syscall/.cargo-checksum.json
@@ -0,0 +1 @@
+{"files":{"Cargo.toml":"0e92420005ca47c7854d02e9b637262cc13f800d48614aeef69be2f1119fc19b","LICENSE":"efcfee7981ff72431fffb06925cad00a23dce079ed4354f61030ad5abdb78829","README.md":"9161f18ba7f69b4ca51e844aee8ffb8237513a468c5c3b1f3a5f989044f895ac","src/arch/aarch64.rs":"61b5811b47a29257c3b5e15e7d9d15e7143bad99fbe29f0cb17ead9cbc17186f","src/arch/nonredox.rs":"9eac0fa2cf9eae07f0cafa2dd63c4a820791897a3de9ad1a933ab4f53458dbd8","src/arch/riscv64.rs":"20bf9a8db779059773b113643d0cb3737fbb5d57f45ee39b8ae9d3396b6ef636","src/arch/x86.rs":"7802186155c06638235e49e11f4c046b68f1d8145b2c849adec84497eb3cb70f","src/arch/x86_64.rs":"f40bad2680fd5e7f100ee1afaa805f33dd0e12ec8786b956d47204f66771801d","src/call.rs":"0d3e32e33ecdf75963e5d244f9e86e94047d155c5de5fa3c0085faf18ed97b33","src/daemon.rs":"11cd633298fe2eb89906a4d8c12ab34e4ee355f759e1216cee536f24c7c679b2","src/data.rs":"bd4545d4c2fcc59ff26ae52ad7f773a697d5ccf639a2ffc253cece6b31e94d51","src/error.rs":"ef20f3817f997a1aeb7114628407f19cb8bc13c555d4e093918f38a5d098f798","src/flag.rs":"f07d6a7aa6766d30d0a303c7b3bda5bb4c473dd9dd51687cf8e0631b1bf3ec9d","src/io/dma.rs":"fbc46e924d5913f5a3fb723751d7a9dd1b079ccf058500fde4957aaf9fa7dd1c","src/io/io.rs":"e1d454ff47efac70fdaa709251a5a9c1c5637f931994ba3bf6a38c6db9145822","src/io/mmio.rs":"12d0fb4d4f45097bf2c14f73cb1ce21325eae193b537e9f18af73ed5281b5e63","src/io/mod.rs":"79c2fce4fd6d75f3b9169df64b7a605feff31fab2e5ed81984ae085a1d07c0c4","src/io/pio.rs":"9ee6f2229b700d1c45b4c8c6242bd99fe69634e16dcd5843d9e8d1c958047406","src/lib.rs":"0bc9c8ca513dc6f0d9ef587bc53587114c31c1217d6b620399fc0fcbc54bf658","src/number.rs":"fe7b47b06566aa1f8a75f50b685801259df03a1a5c85b91817b4552583cd7862","src/scheme/generate.sh":"dde4e30f4e0223fb1a24ed486a6c36e624c854dbf890862cb6866f4fa3c7a6eb","src/scheme/mod.rs":"cb622405deb0aef4ab04499ea1adfd338c9c5dd9c31a1fe9989786dbf69b49d8","src/scheme/scheme.rs":"30263996f0b4930edd76dace5f5750e48229066bc888bc13365846688d0a870b","src/scheme/scheme_block.rs":"b7a761e4349eb87d106c8af14894e8c4272769b9eb235cd500b075ac1f823683","src/scheme/scheme_block_mut.rs":"4a4fc03bce14757b64006b9bc3fa2779e95382b2d99579870146ee0c3be3f46c","src/scheme/scheme_mut.rs":"e6f0671b77f1bf5263e497c69dec553352249b75d52af62ac19477ba5127f803","src/scheme/seek.rs":"94e044de47b0f00eb0c2aea3fb21001ac2b9aa1e4b20d73fd54163fe92fa63f7","src/tests.rs":"416a428ba6a9c5f0d8f4c3dbe91d9aa940a04472ec9a2d17bc5a66c455b4416f"},"package":"fb5a58c1855b4b6819d59012155603f0b22ad30cad752600aadfcb695265519a"}
\ No newline at end of file
diff --git a/third_party/rust/redox_syscall/Cargo.toml b/third_party/rust/redox_syscall/Cargo.toml
new file mode 100644
index 0000000000..74e23e8c9d
--- /dev/null
+++ b/third_party/rust/redox_syscall/Cargo.toml
@@ -0,0 +1,26 @@
+# THIS FILE IS AUTOMATICALLY GENERATED BY CARGO
+#
+# When uploading crates to the registry Cargo will automatically
+# "normalize" Cargo.toml files for maximal compatibility
+# with all versions of Cargo and also rewrite `path` dependencies
+# to registry (e.g., crates.io) dependencies.
+#
+# If you are reading this file be aware that the original Cargo.toml
+# will likely look very different (and much more reasonable).
+# See Cargo.toml.orig for the original contents.
+
+[package]
+edition = "2018"
+name = "redox_syscall"
+version = "0.2.16"
+authors = ["Jeremy Soller <jackpot51@gmail.com>"]
+description = "A Rust library to access raw Redox system calls"
+documentation = "https://docs.rs/redox_syscall"
+license = "MIT"
+repository = "https://gitlab.redox-os.org/redox-os/syscall"
+
+[lib]
+name = "syscall"
+
+[dependencies.bitflags]
+version = "1.1.0"
diff --git a/third_party/rust/redox_syscall/LICENSE b/third_party/rust/redox_syscall/LICENSE
new file mode 100644
index 0000000000..1292bb7fbd
--- /dev/null
+++ b/third_party/rust/redox_syscall/LICENSE
@@ -0,0 +1,22 @@
+Copyright (c) 2017 Redox OS Developers
+
+MIT License
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
diff --git a/third_party/rust/redox_syscall/README.md b/third_party/rust/redox_syscall/README.md
new file mode 100644
index 0000000000..244c90861a
--- /dev/null
+++ b/third_party/rust/redox_syscall/README.md
@@ -0,0 +1,6 @@
+# syscall
+[Redox OS](https://gitlab.redox-os.org/redox-os/redox)'s syscall API
+
+[![MIT licensed](https://img.shields.io/badge/license-MIT-blue.svg)](./LICENSE)
+[![crates.io](http://meritbadge.herokuapp.com/redox_syscall)](https://crates.io/crates/redox_syscall)
+[![docs.rs](https://docs.rs/redox_syscall/badge.svg)](https://docs.rs/redox_syscall)
diff --git a/third_party/rust/redox_syscall/src/arch/aarch64.rs b/third_party/rust/redox_syscall/src/arch/aarch64.rs
new file mode 100644
index 0000000000..e771396e35
--- /dev/null
+++ b/third_party/rust/redox_syscall/src/arch/aarch64.rs
@@ -0,0 +1,132 @@
+use core::{mem, slice};
+use core::ops::{Deref, DerefMut};
+
+use super::error::{Error, Result};
+
+macro_rules! syscall {
+    ($($name:ident($a:ident, $($b:ident, $($c:ident, $($d:ident, $($e:ident, $($f:ident, )?)?)?)?)?);)+) => {
+        $(
+            pub unsafe fn $name($a: usize, $($b: usize, $($c: usize, $($d: usize, $($e: usize, $($f: usize)?)?)?)?)?) -> Result<usize> {
+                let ret: usize;
+
+                core::arch::asm!(
+                    "svc 0",
+                    in("x8") $a,
+                    $(
+                        in("x0") $b,
+                        $(
+                            in("x1") $c,
+                            $(
+                                in("x2") $d,
+                                $(
+                                    in("x3") $e,
+                                    $(
+                                        in("x4") $f,
+                                    )?
+                                )?
+                            )?
+                        )?
+                    )?
+                    lateout("x0") ret,
+                    options(nostack),
+                );
+
+                Error::demux(ret)
+            }
+        )+
+    };
+}
+
+syscall! {
+    syscall0(a,);
+    syscall1(a, b,);
+    syscall2(a, b, c,);
+    syscall3(a, b, c, d,);
+    syscall4(a, b, c, d, e,);
+    syscall5(a, b, c, d, e, f,);
+}
+
+#[derive(Copy, Clone, Debug, Default)]
+#[repr(C)]
+pub struct IntRegisters {
+    pub elr_el1: usize,
+    pub tpidr_el0: usize,
+    pub tpidrro_el0: usize,
+    pub spsr_el1: usize,
+    pub esr_el1: usize,
+    pub sp_el0: usize,      // Shouldn't be used if interrupt occurred at EL1
+    pub padding: usize,     // To keep the struct even number aligned
+    pub x30: usize,
+    pub x29: usize,
+    pub x28: usize,
+    pub x27: usize,
+    pub x26: usize,
+    pub x25: usize,
+    pub x24: usize,
+    pub x23: usize,
+    pub x22: usize,
+    pub x21: usize,
+    pub x20: usize,
+    pub x19: usize,
+    pub x18: usize,
+    pub x17: usize,
+    pub x16: usize,
+    pub x15: usize,
+    pub x14: usize,
+    pub x13: usize,
+    pub x12: usize,
+    pub x11: usize,
+    pub x10: usize,
+    pub x9: usize,
+    pub x8: usize,
+    pub x7: usize,
+    pub x6: usize,
+    pub x5: usize,
+    pub x4: usize,
+    pub x3: usize,
+    pub x2: usize,
+    pub x1: usize,
+    pub x0: usize
+}
+
+impl Deref for IntRegisters {
+    type Target = [u8];
+    fn deref(&self) -> &[u8] {
+        unsafe {
+            slice::from_raw_parts(self as *const IntRegisters as *const u8, mem::size_of::<IntRegisters>())
+        }
+    }
+}
+
+impl DerefMut for IntRegisters {
+    fn deref_mut(&mut self) -> &mut [u8] {
+        unsafe {
+            slice::from_raw_parts_mut(self as *mut IntRegisters as *mut u8, mem::size_of::<IntRegisters>())
+        }
+    }
+}
+
+#[derive(Clone, Copy, Debug, Default)]
+#[repr(packed)]
+pub struct FloatRegisters {
+    pub fp_simd_regs: [u128; 32],
+    pub fpsr: u32,
+    pub fpcr: u32
+}
+
+impl Deref for FloatRegisters {
+    type Target = [u8];
+    fn deref(&self) -> &[u8] {
+        unsafe {
+            slice::from_raw_parts(self as *const FloatRegisters as *const u8, mem::size_of::<FloatRegisters>())
+        }
+    }
+}
+
+impl DerefMut for FloatRegisters {
+    fn deref_mut(&mut self) -> &mut [u8] {
+        unsafe {
+            slice::from_raw_parts_mut(self as *mut FloatRegisters as *mut u8, mem::size_of::<FloatRegisters>())
+        }
+    }
+}
diff --git a/third_party/rust/redox_syscall/src/arch/nonredox.rs b/third_party/rust/redox_syscall/src/arch/nonredox.rs
new file mode 100644
index 0000000000..f99a7148cf
--- /dev/null
+++ b/third_party/rust/redox_syscall/src/arch/nonredox.rs
@@ -0,0 +1,26 @@
+use super::error::{Error, Result, ENOSYS};
+
+pub unsafe fn syscall0(_a: usize) -> Result<usize> {
+    Err(Error::new(ENOSYS))
+}
+
+pub unsafe fn syscall1(_a: usize, _b: usize) -> Result<usize> {
+    Err(Error::new(ENOSYS))
+}
+
+pub unsafe fn syscall2(_a: usize, _b: usize, _c: usize) -> Result<usize> {
+    Err(Error::new(ENOSYS))
+}
+
+pub unsafe fn syscall3(_a: usize, _b: usize, _c: usize, _d: usize) -> Result<usize> {
+    Err(Error::new(ENOSYS))
+}
+
+pub unsafe fn syscall4(_a: usize, _b: usize, _c: usize, _d: usize, _e: usize) -> Result<usize> {
+    Err(Error::new(ENOSYS))
+}
+
+pub unsafe fn syscall5(_a: usize, _b: usize, _c: usize, _d: usize, _e: usize, _f: usize)
+                       -> Result<usize> {
+    Err(Error::new(ENOSYS))
+}
diff --git a/third_party/rust/redox_syscall/src/arch/riscv64.rs b/third_party/rust/redox_syscall/src/arch/riscv64.rs
new file mode 100644
index 0000000000..2a90260da4
--- /dev/null
+++ b/third_party/rust/redox_syscall/src/arch/riscv64.rs
@@ -0,0 +1,93 @@
+use core::{mem, slice};
+use core::ops::{Deref, DerefMut};
+
+use super::error::{Error, Result};
+
+macro_rules! syscall {
+    ($($name:ident($a:ident, $($b:ident, $($c:ident, $($d:ident, $($e:ident, $($f:ident, )?)?)?)?)?);)+) => {
+        $(
+            pub unsafe fn $name($a: usize, $($b: usize, $($c: usize, $($d: usize, $($e: usize, $($f: usize)?)?)?)?)?) -> Result<usize> {
+                let ret: usize;
+
+                asm!(
+                    "ecall",
+                    in("a7") $a,
+                    $(
+                        in("a0") $b,
+                        $(
+                            in("a1") $c,
+                            $(
+                                in("a2") $d,
+                                $(
+                                    in("a3") $e,
+                                    $(
+                                        in("a4") $f,
+                                    )?
+                                )?
+                            )?
+                        )?
+                    )?
+                    lateout("a0") ret,
+                    options(nostack),
+                );
+
+                Error::demux(ret)
+            }
+        )+
+    };
+}
+
+syscall! {
+    syscall0(a,);
+    syscall1(a, b,);
+    syscall2(a, b, c,);
+    syscall3(a, b, c, d,);
+    syscall4(a, b, c, d, e,);
+    syscall5(a, b, c, d, e, f,);
+}
+
+#[derive(Copy, Clone, Debug, Default)]
+#[repr(C)]
+pub struct IntRegisters {
+    //TODO
+}
+
+impl Deref for IntRegisters {
+    type Target = [u8];
+    fn deref(&self) -> &[u8] {
+        unsafe {
+            slice::from_raw_parts(self as *const IntRegisters as *const u8, mem::size_of::<IntRegisters>())
+        }
+    }
+}
+
+impl DerefMut for IntRegisters {
+    fn deref_mut(&mut self) -> &mut [u8] {
+        unsafe {
+            slice::from_raw_parts_mut(self as *mut IntRegisters as *mut u8, mem::size_of::<IntRegisters>())
+        }
+    }
+}
+
+#[derive(Clone, Copy, Debug, Default)]
+#[repr(packed)]
+pub struct FloatRegisters {
+    //TODO
+}
+
+impl Deref for FloatRegisters {
+    type Target = [u8];
+    fn deref(&self) -> &[u8] {
+        unsafe {
+            slice::from_raw_parts(self as *const FloatRegisters as *const u8, mem::size_of::<FloatRegisters>())
+        }
+    }
+}
+
+impl DerefMut for FloatRegisters {
+    fn deref_mut(&mut self) -> &mut [u8] {
+        unsafe {
+            slice::from_raw_parts_mut(self as *mut FloatRegisters as *mut u8, mem::size_of::<FloatRegisters>())
+        }
+    }
+}
diff --git a/third_party/rust/redox_syscall/src/arch/x86.rs b/third_party/rust/redox_syscall/src/arch/x86.rs
new file mode 100644
index 0000000000..2f9301e0e0
--- /dev/null
+++ b/third_party/rust/redox_syscall/src/arch/x86.rs
@@ -0,0 +1,105 @@
+use core::{mem, slice};
+use core::arch::asm;
+use core::ops::{Deref, DerefMut};
+
+use super::error::{Error, Result};
+
+macro_rules! syscall {
+    ($($name:ident($a:ident, $($b:ident, $($c:ident, $($d:ident, $($e:ident, $($f:ident, )?)?)?)?)?);)+) => {
+        $(
+            pub unsafe fn $name(mut $a: usize, $($b: usize, $($c: usize, $($d: usize, $($e: usize, $($f: usize)?)?)?)?)?) -> Result<usize> {
+                asm!(
+                    "int 0x80",
+                    inout("eax") $a,
+                    $(
+                        in("ebx") $b,
+                        $(
+                            in("ecx") $c,
+                            $(
+                                in("edx") $d,
+                                $(
+                                    in("esi") $e,
+                                    $(
+                                        in("edi") $f,
+                                    )?
+                                )?
+                            )?
+                        )?
+                    )?
+                    options(nostack),
+                );
+
+                Error::demux($a)
+            }
+        )+
+    };
+}
+
+syscall! {
+    syscall0(a,);
+    syscall1(a, b,);
+    syscall2(a, b, c,);
+    syscall3(a, b, c, d,);
+    // Must be done custom because LLVM reserves ESI
+    //syscall4(a, b, c, d, e,);
+    //syscall5(a, b, c, d, e, f,);
+}
+
+pub unsafe fn syscall4(mut a: usize, b: usize, c: usize, d: usize, e: usize)
+                       -> Result<usize> {
+    asm!(
+        "xchg esi, {e}
+        int 0x80
+        xchg esi, {e}",
+        e = in(reg) e,
+        inout("eax") a,
+        in("ebx") b,
+        in("ecx") c,
+        in("edx") d,
+        options(nostack),
+    );
+
+    Error::demux(a)
+}
+
+pub unsafe fn syscall5(mut a: usize, b: usize, c: usize, d: usize, e: usize, f: usize)
+                       -> Result<usize> {
+    asm!(
+        "xchg esi, {e}
+        int 0x80
+        xchg esi, {e}",
+        e = in(reg) e,
+        inout("eax") a,
+        in("ebx") b,
+        in("ecx") c,
+        in("edx") d,
+        in("edi") f,
+        options(nostack),
+    );
+
+    Error::demux(a)
+}
+
+#[derive(Clone, Copy, Debug, Default)]
+#[repr(packed)]
+pub struct EnvRegisters {
+    pub fsbase: u32,
+    pub gsbase: u32,
+}
+
+impl Deref for EnvRegisters {
+    type Target = [u8];
+    fn deref(&self) -> &[u8] {
+        unsafe {
+            slice::from_raw_parts(self as *const EnvRegisters as *const u8, mem::size_of::<EnvRegisters>())
+        }
+    }
+}
+
+impl DerefMut for EnvRegisters {
+    fn deref_mut(&mut self) -> &mut [u8] {
+        unsafe {
+            slice::from_raw_parts_mut(self as *mut EnvRegisters as *mut u8, mem::size_of::<EnvRegisters>())
+        }
+    }
+}
diff --git a/third_party/rust/redox_syscall/src/arch/x86_64.rs b/third_party/rust/redox_syscall/src/arch/x86_64.rs
new file mode 100644
index 0000000000..f71898e90c
--- /dev/null
+++ b/third_party/rust/redox_syscall/src/arch/x86_64.rs
@@ -0,0 +1,155 @@
+use core::{mem, slice};
+use core::arch::asm;
+use core::ops::{Deref, DerefMut};
+
+use super::error::{Error, Result};
+
+macro_rules! syscall {
+    ($($name:ident($a:ident, $($b:ident, $($c:ident, $($d:ident, $($e:ident, $($f:ident, )?)?)?)?)?);)+) => {
+        $(
+            pub unsafe fn $name(mut $a: usize, $($b: usize, $($c: usize, $($d: usize, $($e: usize, $($f: usize)?)?)?)?)?) -> Result<usize> {
+                asm!(
+                    "syscall",
+                    inout("rax") $a,
+                    $(
+                        in("rdi") $b,
+                        $(
+                            in("rsi") $c,
+                            $(
+                                in("rdx") $d,
+                                $(
+                                    in("r10") $e,
+                                    $(
+                                        in("r8") $f,
+                                    )?
+                                )?
+                            )?
+                        )?
+                    )?
+                    out("rcx") _,
+                    out("r11") _,
+                    options(nostack),
+                );
+
+                Error::demux($a)
+            }
+        )+
+    };
+}
+
+syscall! {
+    syscall0(a,);
+    syscall1(a, b,);
+    syscall2(a, b, c,);
+    syscall3(a, b, c, d,);
+    syscall4(a, b, c, d, e,);
+    syscall5(a, b, c, d, e, f,);
+}
+
+#[derive(Copy, Clone, Debug, Default)]
+#[repr(C)]
+pub struct IntRegisters {
+    // TODO: Some of these don't get set by Redox yet. Should they?
+
+    pub r15: usize,
+    pub r14: usize,
+    pub r13: usize,
+    pub r12: usize,
+    pub rbp: usize,
+    pub rbx: usize,
+    pub r11: usize,
+    pub r10: usize,
+    pub r9: usize,
+    pub r8: usize,
+    pub rax: usize,
+    pub rcx: usize,
+    pub rdx: usize,
+    pub rsi: usize,
+    pub rdi: usize,
+    // pub orig_rax: usize,
+    pub rip: usize,
+    pub cs: usize,
+    pub rflags: usize,
+    pub rsp: usize,
+    pub ss: usize,
+    // pub fs_base: usize,
+    // pub gs_base: usize,
+    // pub ds: usize,
+    // pub es: usize,
+    pub fs: usize,
+    // pub gs: usize
+}
+
+impl Deref for IntRegisters {
+    type Target = [u8];
+    fn deref(&self) -> &[u8] {
+        unsafe {
+            slice::from_raw_parts(self as *const IntRegisters as *const u8, mem::size_of::<IntRegisters>())
+        }
+    }
+}
+
+impl DerefMut for IntRegisters {
+    fn deref_mut(&mut self) -> &mut [u8] {
+        unsafe {
+            slice::from_raw_parts_mut(self as *mut IntRegisters as *mut u8, mem::size_of::<IntRegisters>())
+        }
+    }
+}
+
+#[derive(Clone, Copy, Debug, Default)]
+#[repr(packed)]
+pub struct FloatRegisters {
+    pub fcw: u16,
+    pub fsw: u16,
+    pub ftw: u8,
+    pub _reserved: u8,
+    pub fop: u16,
+    pub fip: u64,
+    pub fdp: u64,
+    pub mxcsr: u32,
+    pub mxcsr_mask: u32,
+    pub st_space: [u128; 8],
+    pub xmm_space: [u128; 16],
+    // TODO: YMM/ZMM
+}
+
+impl Deref for FloatRegisters {
+    type Target = [u8];
+    fn deref(&self) -> &[u8] {
+        unsafe {
+            slice::from_raw_parts(self as *const FloatRegisters as *const u8, mem::size_of::<FloatRegisters>())
+        }
+    }
+}
+
+impl DerefMut for FloatRegisters {
+    fn deref_mut(&mut self) -> &mut [u8] {
+        unsafe {
+            slice::from_raw_parts_mut(self as *mut FloatRegisters as *mut u8, mem::size_of::<FloatRegisters>())
+        }
+    }
+}
+#[derive(Clone, Copy, Debug, Default)]
+#[repr(packed)]
+pub struct EnvRegisters {
+    pub fsbase: u64,
+    pub gsbase: u64,
+    // TODO: PKRU?
+}
+impl Deref for EnvRegisters {
+    type Target = [u8];
+    fn deref(&self) -> &[u8] {
+        unsafe {
+            slice::from_raw_parts(self as *const EnvRegisters as *const u8, mem::size_of::<EnvRegisters>())
+        }
+    }
+}
+
+impl DerefMut for EnvRegisters {
+    fn deref_mut(&mut self) -> &mut [u8] {
+        unsafe {
+            slice::from_raw_parts_mut(self as *mut EnvRegisters as *mut u8, mem::size_of::<EnvRegisters>())
+        }
+    }
+}
diff --git a/third_party/rust/redox_syscall/src/call.rs b/third_party/rust/redox_syscall/src/call.rs
new file mode 100644
index 0000000000..f6eb89c8c0
--- /dev/null
+++ b/third_party/rust/redox_syscall/src/call.rs
@@ -0,0 +1,420 @@
+use super::arch::*;
+use super::data::{Map, SigAction, Stat, StatVfs, TimeSpec};
+use super::error::Result;
+use super::flag::*;
+use super::number::*;
+
+use core::{mem, ptr};
+
+// Signal restorer
+extern "C" fn restorer() -> ! {
+    sigreturn().unwrap();
+    unreachable!();
+}
+
+/// Change the process's working directory
+///
+/// This function will attempt to set the process's working directory to `path`, which can be
+/// either a relative, scheme relative, or absolute path.
+///
+/// On success, `Ok(0)` will be returned. On error, one of the following errors will be returned.
+///
+/// # Errors
+///
+/// * `EACCES` - permission is denied for one of the components of `path`, or `path`
+/// * `EFAULT` - `path` does not point to the process's addressible memory
+/// * `EIO` - an I/O error occurred
+/// * `ENOENT` - `path` does not exit
+/// * `ENOTDIR` - `path` is not a directory
+pub fn chdir<T: AsRef<str>>(path: T) -> Result<usize> {
+    unsafe { syscall2(SYS_CHDIR, path.as_ref().as_ptr() as usize, path.as_ref().len()) }
+}
+
+#[deprecated(
+    since = "0.1.55",
+    note = "use fchmod instead"
+)]
+pub fn chmod<T: AsRef<str>>(path: T, mode: usize) -> Result<usize> {
+    unsafe { syscall3(SYS_CHMOD, path.as_ref().as_ptr() as usize, path.as_ref().len(), mode) }
+}
+
+/// Produce a fork of the current process, or a new process thread
+pub unsafe fn clone(flags: CloneFlags) -> Result<usize> {
+    syscall1(SYS_CLONE, flags.bits())
+}
+
+/// Close a file
+pub fn close(fd: usize) -> Result<usize> {
+    unsafe { syscall1(SYS_CLOSE, fd) }
+}
+
+/// Get the current system time
+pub fn clock_gettime(clock: usize, tp: &mut TimeSpec) -> Result<usize> {
+    unsafe { syscall2(SYS_CLOCK_GETTIME, clock, tp as *mut TimeSpec as usize) }
+}
+
+/// Copy and transform a file descriptor
+pub fn dup(fd: usize, buf: &[u8]) -> Result<usize> {
+    unsafe { syscall3(SYS_DUP, fd, buf.as_ptr() as usize, buf.len()) }
+}
+
+/// Copy and transform a file descriptor
+pub fn dup2(fd: usize, newfd: usize, buf: &[u8]) -> Result<usize> {
+    unsafe { syscall4(SYS_DUP2, fd, newfd, buf.as_ptr() as usize, buf.len()) }
+}
+
+/// Exit the current process
+pub fn exit(status: usize) -> Result<usize> {
+    unsafe { syscall1(SYS_EXIT, status) }
+}
+
+/// Change file permissions
+pub fn fchmod(fd: usize, mode: u16) -> Result<usize> {
+    unsafe { syscall2(SYS_FCHMOD, fd, mode as usize) }
+
+}
+
+/// Change file ownership
+pub fn fchown(fd: usize, uid: u32, gid: u32) -> Result<usize> {
+    unsafe { syscall3(SYS_FCHOWN, fd, uid as usize, gid as usize) }
+
+}
+
+/// Change file descriptor flags
+pub fn fcntl(fd: usize, cmd: usize, arg: usize) -> Result<usize> {
+    unsafe { syscall3(SYS_FCNTL, fd, cmd, arg) }
+}
+
+/// Replace the current process with a new executable
+pub fn fexec(fd: usize, args: &[[usize; 2]], vars: &[[usize; 2]]) -> Result<usize> {
+    unsafe { syscall5(SYS_FEXEC, fd, args.as_ptr() as usize, args.len(), vars.as_ptr() as usize, vars.len()) }
+}
+
+/// Map a file into memory, but with the ability to set the address to map into, either as a hint
+/// or as a requirement of the map.
+///
+/// # Errors
+/// `EACCES` - the file descriptor was not open for reading
+/// `EBADF` - if the file descriptor was invalid
+/// `ENODEV` - mmapping was not supported
+/// `EINVAL` - invalid combination of flags
+/// `EEXIST` - if [`MapFlags::MAP_FIXED`] was set, and the address specified was already in use.
+///
+pub unsafe fn fmap(fd: usize, map: &Map) -> Result<usize> {
+    syscall3(SYS_FMAP, fd, map as *const Map as usize, mem::size_of::<Map>())
+}
+
+/// Unmap whole (or partial) continous memory-mapped files
+pub unsafe fn funmap(addr: usize, len: usize) -> Result<usize> {
+    syscall2(SYS_FUNMAP, addr, len)
+}
+
+/// Retrieve the canonical path of a file
+pub fn fpath(fd: usize, buf: &mut [u8]) -> Result<usize> {
+    unsafe { syscall3(SYS_FPATH, fd, buf.as_mut_ptr() as usize, buf.len()) }
+}
+
+/// Rename a file
+pub fn frename<T: AsRef<str>>(fd: usize, path: T) -> Result<usize> {
+    unsafe { syscall3(SYS_FRENAME, fd, path.as_ref().as_ptr() as usize, path.as_ref().len()) }
+}
+
+/// Get metadata about a file
+pub fn fstat(fd: usize, stat: &mut Stat) -> Result<usize> {
+    unsafe { syscall3(SYS_FSTAT, fd, stat as *mut Stat as usize, mem::size_of::<Stat>()) }
+}
+
+/// Get metadata about a filesystem
+pub fn fstatvfs(fd: usize, stat: &mut StatVfs) -> Result<usize> {
+    unsafe { syscall3(SYS_FSTATVFS, fd, stat as *mut StatVfs as usize, mem::size_of::<StatVfs>()) }
+}
+
+/// Sync a file descriptor to its underlying medium
+pub fn fsync(fd: usize) -> Result<usize> {
+    unsafe { syscall1(SYS_FSYNC, fd) }
+}
+
+/// Truncate or extend a file to a specified length
+pub fn ftruncate(fd: usize, len: usize) -> Result<usize> {
+    unsafe { syscall2(SYS_FTRUNCATE, fd, len) }
+}
+
+// Change modify and/or access times
+pub fn futimens(fd: usize, times: &[TimeSpec]) -> Result<usize> {
+    unsafe { syscall3(SYS_FUTIMENS, fd, times.as_ptr() as usize, times.len() * mem::size_of::<TimeSpec>()) }
+}
+
+/// Fast userspace mutex
+pub unsafe fn futex(addr: *mut i32, op: usize, val: i32, val2: usize, addr2: *mut i32)
+                    -> Result<usize> {
+    syscall5(SYS_FUTEX, addr as usize, op, (val as isize) as usize, val2, addr2 as usize)
+}
+
+/// Get the current working directory
+pub fn getcwd(buf: &mut [u8]) -> Result<usize> {
+    unsafe { syscall2(SYS_GETCWD, buf.as_mut_ptr() as usize, buf.len()) }
+}
+
+/// Get the effective group ID
+pub fn getegid() -> Result<usize> {
+    unsafe { syscall0(SYS_GETEGID) }
+}
+
+/// Get the effective namespace
+pub fn getens() -> Result<usize> {
+    unsafe { syscall0(SYS_GETENS) }
+}
+
+/// Get the effective user ID
+pub fn geteuid() -> Result<usize> {
+    unsafe { syscall0(SYS_GETEUID) }
+}
+
+/// Get the current group ID
+pub fn getgid() -> Result<usize> {
+    unsafe { syscall0(SYS_GETGID) }
+}
+
+/// Get the current namespace
+pub fn getns() -> Result<usize> {
+    unsafe { syscall0(SYS_GETNS) }
+}
+
+/// Get the current process ID
+pub fn getpid() -> Result<usize> {
+    unsafe { syscall0(SYS_GETPID) }
+}
+
+/// Get the process group ID
+pub fn getpgid(pid: usize) -> Result<usize> {
+    unsafe { syscall1(SYS_GETPGID, pid) }
+}
+
+/// Get the parent process ID
+pub fn getppid() -> Result<usize> {
+    unsafe { syscall0(SYS_GETPPID) }
+}
+
+/// Get the current user ID
+pub fn getuid() -> Result<usize> {
+    unsafe { syscall0(SYS_GETUID) }
+}
+
+/// Set the I/O privilege level
+///
+/// # Errors
+///
+/// * `EPERM` - `uid != 0`
+/// * `EINVAL` - `level > 3`
+pub unsafe fn iopl(level: usize) -> Result<usize> {
+    syscall1(SYS_IOPL, level)
+}
+
+/// Send a signal `sig` to the process identified by `pid`
+pub fn kill(pid: usize, sig: usize) -> Result<usize> {
+    unsafe { syscall2(SYS_KILL, pid, sig) }
+}
+
+/// Create a link to a file
+pub unsafe fn link(old: *const u8, new: *const u8) -> Result<usize> {
+    syscall2(SYS_LINK, old as usize, new as usize)
+}
+
+/// Seek to `offset` bytes in a file descriptor
+pub fn lseek(fd: usize, offset: isize, whence: usize) -> Result<usize> {
+    unsafe { syscall3(SYS_LSEEK, fd, offset as usize, whence) }
+}
+
+/// Make a new scheme namespace
+pub fn mkns(schemes: &[[usize; 2]]) -> Result<usize> {
+    unsafe { syscall2(SYS_MKNS, schemes.as_ptr() as usize, schemes.len()) }
+}
+
+/// Change mapping flags
+pub unsafe fn mprotect(addr: usize, size: usize, flags: MapFlags) -> Result<usize> {
+    syscall3(SYS_MPROTECT, addr, size, flags.bits())
+}
+
+/// Sleep for the time specified in `req`
+pub fn nanosleep(req: &TimeSpec, rem: &mut TimeSpec) -> Result<usize> {
+    unsafe { syscall2(SYS_NANOSLEEP, req as *const TimeSpec as usize,
+                                     rem as *mut TimeSpec as usize) }
+}
+
+/// Open a file
+pub fn open<T: AsRef<str>>(path: T, flags: usize) -> Result<usize> {
+    unsafe { syscall3(SYS_OPEN, path.as_ref().as_ptr() as usize, path.as_ref().len(), flags) }
+}
+
+/// Allocate frames, linearly in physical memory.
+///
+/// # Errors
+///
+/// * `EPERM` - `uid != 0`
+/// * `ENOMEM` - the system has run out of available memory
+pub unsafe fn physalloc(size: usize) -> Result<usize> {
+    syscall1(SYS_PHYSALLOC, size)
+}
+
+/// Allocate frames, linearly in physical memory, with an extra set of flags. If the flags contain
+/// [`PARTIAL_ALLOC`], this will result in `physalloc3` with `min = 1`.
+///
+/// Refer to the simpler [`physalloc`] and the more complex [`physalloc3`], that this convenience
+/// function is based on.
+///
+/// # Errors
+///
+/// * `EPERM` - `uid != 0`
+/// * `ENOMEM` - the system has run out of available memory
+pub unsafe fn physalloc2(size: usize, flags: usize) -> Result<usize> {
+    let mut ret = 1usize;
+    physalloc3(size, flags, &mut ret)
+}
+
+/// Allocate frames, linearly in physical memory, with an extra set of flags. If the flags contain
+/// [`PARTIAL_ALLOC`], the `min` parameter specifies the number of frames that have to be allocated
+/// for this operation to succeed. The return value is the offset of the first frame, and `min` is
+/// overwritten with the number of frames actually allocated.
+///
+/// Refer to the simpler [`physalloc`] and the simpler library function [`physalloc2`].
+///
+/// # Errors
+///
+/// * `EPERM` - `uid != 0`
+/// * `ENOMEM` - the system has run out of available memory
+/// * `EINVAL` - `min = 0`
+pub unsafe fn physalloc3(size: usize, flags: usize, min: &mut usize) -> Result<usize> {
+    syscall3(SYS_PHYSALLOC3, size, flags, min as *mut usize as usize)
+}
+
+/// Free physically allocated pages
+///
+/// # Errors
+///
+/// * `EPERM` - `uid != 0`
+pub unsafe fn physfree(physical_address: usize, size: usize) -> Result<usize> {
+    syscall2(SYS_PHYSFREE, physical_address, size)
+}
+
+/// Map physical memory to virtual memory
+///
+/// # Errors
+///
+/// * `EPERM` - `uid != 0`
+pub unsafe fn physmap(physical_address: usize, size: usize, flags: PhysmapFlags) -> Result<usize> {
+    syscall3(SYS_PHYSMAP, physical_address, size, flags.bits())
+}
+
+/// Unmap previously mapped physical memory
+///
+/// # Errors
+///
+/// * `EPERM` - `uid != 0`
+/// * `EFAULT` - `virtual_address` has not been mapped
+pub unsafe fn physunmap(virtual_address: usize) -> Result<usize> {
+    syscall1(SYS_PHYSUNMAP, virtual_address)
+}
+
+/// Create a pair of file descriptors referencing the read and write ends of a pipe
+pub fn pipe2(fds: &mut [usize; 2], flags: usize) -> Result<usize> {
+    unsafe { syscall2(SYS_PIPE2, fds.as_ptr() as usize, flags) }
+}
+
+/// Read from a file descriptor into a buffer
+pub fn read(fd: usize, buf: &mut [u8]) -> Result<usize> {
+    unsafe { syscall3(SYS_READ, fd, buf.as_mut_ptr() as usize, buf.len()) }
+}
+
+/// Remove a directory
+pub fn rmdir<T: AsRef<str>>(path: T) -> Result<usize> {
+    unsafe { syscall2(SYS_RMDIR, path.as_ref().as_ptr() as usize, path.as_ref().len()) }
+}
+
+/// Set the process group ID
+pub fn setpgid(pid: usize, pgid: usize) -> Result<usize> {
+    unsafe { syscall2(SYS_SETPGID, pid, pgid) }
+}
+
+/// Set the current process group IDs
+pub fn setregid(rgid: usize, egid: usize) -> Result<usize> {
+    unsafe { syscall2(SYS_SETREGID, rgid, egid) }
+}
+
+/// Make a new scheme namespace
+pub fn setrens(rns: usize, ens: usize) -> Result<usize> {
+    unsafe { syscall2(SYS_SETRENS, rns, ens) }
+}
+
+/// Set the current process user IDs
+pub fn setreuid(ruid: usize, euid: usize) -> Result<usize> {
+    unsafe { syscall2(SYS_SETREUID, ruid, euid) }
+}
+
+/// Set up a signal handler
+pub fn sigaction(sig: usize, act: Option<&SigAction>, oldact: Option<&mut SigAction>) -> Result<usize> {
+    unsafe { syscall4(SYS_SIGACTION, sig,
+                      act.map(|x| x as *const _).unwrap_or_else(ptr::null) as usize,
+                      oldact.map(|x| x as *mut _).unwrap_or_else(ptr::null_mut) as usize,
+                      restorer as usize) }
+}
+
+/// Get and/or set signal masks
+pub fn sigprocmask(how: usize, set: Option<&[u64; 2]>, oldset: Option<&mut [u64; 2]>) -> Result<usize> {
+    unsafe { syscall3(SYS_SIGPROCMASK, how,
+                      set.map(|x| x as *const _).unwrap_or_else(ptr::null) as usize,
+                      oldset.map(|x| x as *mut _).unwrap_or_else(ptr::null_mut) as usize) }
+}
+
+// Return from signal handler
+pub fn sigreturn() -> Result<usize> {
+    unsafe { syscall0(SYS_SIGRETURN) }
+}
+
+/// Set the file mode creation mask
+pub fn umask(mask: usize) -> Result<usize> {
+    unsafe { syscall1(SYS_UMASK, mask) }
+}
+
+/// Remove a file
+pub fn unlink<T: AsRef<str>>(path: T) -> Result<usize> {
+    unsafe { syscall2(SYS_UNLINK, path.as_ref().as_ptr() as usize, path.as_ref().len()) }
+}
+
+/// Convert a virtual address to a physical one
+///
+/// # Errors
+///
+/// * `EPERM` - `uid != 0`
+pub unsafe fn virttophys(virtual_address: usize) -> Result<usize> {
+    syscall1(SYS_VIRTTOPHYS, virtual_address)
+}
+
+/// Check if a child process has exited or received a signal
+pub fn waitpid(pid: usize, status: &mut usize, options: WaitFlags) -> Result<usize> {
+    unsafe { syscall3(SYS_WAITPID, pid, status as *mut usize as usize, options.bits()) }
+}
+
+/// Write a buffer to a file descriptor
+///
+/// The kernel will attempt to write the bytes in `buf` to the file descriptor `fd`, returning
+/// either an `Err`, explained below, or `Ok(count)` where `count` is the number of bytes which
+/// were written.
+///
+/// # Errors
+///
+/// * `EAGAIN` - the file descriptor was opened with `O_NONBLOCK` and writing would block
+/// * `EBADF` - the file descriptor is not valid or is not open for writing
+/// * `EFAULT` - `buf` does not point to the process's addressible memory
+/// * `EIO` - an I/O error occurred
+/// * `ENOSPC` - the device containing the file descriptor has no room for data
+/// * `EPIPE` - the file descriptor refers to a pipe or socket whose reading end is closed
+pub fn write(fd: usize, buf: &[u8]) -> Result<usize> {
+    unsafe { syscall3(SYS_WRITE, fd, buf.as_ptr() as usize, buf.len()) }
+}
+
+/// Yield the process's time slice to the kernel
+///
+/// This function will return Ok(0) on success
+pub fn sched_yield() -> Result<usize> {
+    unsafe { syscall0(SYS_YIELD) }
+}
diff --git a/third_party/rust/redox_syscall/src/daemon.rs b/third_party/rust/redox_syscall/src/daemon.rs
new file mode 100644
index 0000000000..6433bcd7d2
--- /dev/null
+++ b/third_party/rust/redox_syscall/src/daemon.rs
@@ -0,0 +1,62 @@
+use core::convert::Infallible;
+
+use super::{
+    clone,
+    CloneFlags,
+    close,
+    EIO,
+    Error,
+    exit,
+    pipe2,
+    read,
+    Result,
+    write,
+};
+
+#[must_use = "Daemon::ready must be called"]
+pub struct Daemon {
+    write_pipe: usize,
+}
+
+impl Daemon {
+    pub fn new<F: FnOnce(Daemon) -> Infallible>(f: F) -> Result<Infallible> {
+        let mut pipes = [0; 2];
+        pipe2(&mut pipes, 0)?;
+
+        let [read_pipe, write_pipe] = pipes;
+
+        if unsafe { clone(CloneFlags::empty())? } == 0 {
+            let _ = close(read_pipe);
+
+            f(Daemon {
+                write_pipe,
+            });
+            // TODO: Replace Infallible with the never type once it is stabilized.
+            unreachable!();
+        } else {
+            let _ = close(write_pipe);
+
+            let mut data = [0];
+            let res = read(read_pipe, &mut data);
+            let _ = close(read_pipe);
+
+            if res? == 1 {
+                exit(data[0] as usize)?;
+                unreachable!();
+            } else {
+                Err(Error::new(EIO))
+            }
+        }
+    }
+
+    pub fn ready(self) -> Result<()> {
+        let res = write(self.write_pipe, &[0]);
+        let _ = close(self.write_pipe);
+
+        if res? == 1 {
+            Ok(())
+        } else {
+            Err(Error::new(EIO))
+        }
+    }
+}
diff --git a/third_party/rust/redox_syscall/src/data.rs b/third_party/rust/redox_syscall/src/data.rs
new file mode 100644
index 0000000000..45d2dd8625
--- /dev/null
+++ b/third_party/rust/redox_syscall/src/data.rs
@@ -0,0 +1,297 @@
+use core::ops::{Deref, DerefMut};
+use core::{mem, slice};
+use crate::flag::{EventFlags, MapFlags, PtraceFlags, SigActionFlags};
+
+#[derive(Copy, Clone, Debug, Default)]
+#[repr(C)]
+pub struct Event {
+    pub id: usize,
+    pub flags: EventFlags,
+    pub data: usize
+}
+
+impl Deref for Event {
+    type Target = [u8];
+    fn deref(&self) -> &[u8] {
+        unsafe {
+            slice::from_raw_parts(self as *const Event as *const u8, mem::size_of::<Event>())
+        }
+    }
+}
+
+impl DerefMut for Event {
+    fn deref_mut(&mut self) -> &mut [u8] {
+        unsafe {
+            slice::from_raw_parts_mut(self as *mut Event as *mut u8, mem::size_of::<Event>())
+        }
+    }
+}
+
+#[derive(Copy, Clone, Debug, Default)]
+#[repr(C)]
+pub struct ITimerSpec {
+    pub it_interval: TimeSpec,
+    pub it_value: TimeSpec,
+}
+
+impl Deref for ITimerSpec {
+    type Target = [u8];
+    fn deref(&self) -> &[u8] {
+        unsafe {
+            slice::from_raw_parts(self as *const ITimerSpec as *const u8,
+                                  mem::size_of::<ITimerSpec>())
+        }
+    }
+}
+
+impl DerefMut for ITimerSpec {
+    fn deref_mut(&mut self) -> &mut [u8] {
+        unsafe {
+            slice::from_raw_parts_mut(self as *mut ITimerSpec as *mut u8,
+                                      mem::size_of::<ITimerSpec>())
+        }
+    }
+}
+
+#[derive(Copy, Clone, Debug, Default)]
+#[repr(C)]
+pub struct OldMap {
+    pub offset: usize,
+    pub size: usize,
+    pub flags: MapFlags,
+}
+
+impl Deref for OldMap {
+    type Target = [u8];
+    fn deref(&self) -> &[u8] {
+        unsafe {
+            slice::from_raw_parts(self as *const OldMap as *const u8, mem::size_of::<OldMap>())
+        }
+    }
+}
+
+impl DerefMut for OldMap {
+    fn deref_mut(&mut self) -> &mut [u8] {
+        unsafe {
+            slice::from_raw_parts_mut(self as *mut OldMap as *mut u8, mem::size_of::<OldMap>())
+        }
+    }
+}
+#[derive(Copy, Clone, Debug, Default)]
+#[repr(C)]
+pub struct Map {
+    /// The offset inside the file that is being mapped.
+    pub offset: usize,
+
+    /// The size of the memory map.
+    pub size: usize,
+
+    /// Contains both prot and map flags.
+    pub flags: MapFlags,
+
+    /// Functions as a hint to where in the virtual address space of the running process, to place
+    /// the memory map. If [`MapFlags::MAP_FIXED`] is set, then this address must be the address to
+    /// map to.
+    pub address: usize,
+}
+
+impl Deref for Map {
+    type Target = [u8];
+    fn deref(&self) -> &[u8] {
+        unsafe {
+            slice::from_raw_parts(self as *const Map as *const u8, mem::size_of::<Map>())
+        }
+    }
+}
+
+impl DerefMut for Map {
+    fn deref_mut(&mut self) -> &mut [u8] {
+        unsafe {
+            slice::from_raw_parts_mut(self as *mut Map as *mut u8, mem::size_of::<Map>())
+        }
+    }
+}
+
+#[derive(Copy, Clone, Debug, Default)]
+#[repr(C)]
+pub struct Packet {
+    pub id: u64,
+    pub pid: usize,
+    pub uid: u32,
+    pub gid: u32,
+    pub a: usize,
+    pub b: usize,
+    pub c: usize,
+    pub d: usize
+}
+
+impl Deref for Packet {
+    type Target = [u8];
+    fn deref(&self) -> &[u8] {
+        unsafe {
+            slice::from_raw_parts(self as *const Packet as *const u8, mem::size_of::<Packet>())
+        }
+    }
+}
+
+impl DerefMut for Packet {
+    fn deref_mut(&mut self) -> &mut [u8] {
+        unsafe {
+            slice::from_raw_parts_mut(self as *mut Packet as *mut u8, mem::size_of::<Packet>())
+        }
+    }
+}
+
+#[derive(Copy, Clone, Debug, Default, PartialEq)]
+#[repr(C)]
+pub struct SigAction {
+    pub sa_handler: Option<extern "C" fn(usize)>,
+    pub sa_mask: [u64; 2],
+    pub sa_flags: SigActionFlags,
+}
+
+#[allow(dead_code)]
+unsafe fn _assert_size_of_function_is_sane() {
+    // Transmuting will complain *at compile time* if sizes differ.
+    // Rust forbids a fn-pointer from being 0 so to allow SIG_DFL to
+    // exist, we use Option<extern "C" fn(usize)> which will mean 0
+    // becomes None
+    let _ = mem::transmute::<Option<extern "C" fn(usize)>, usize>(None);
+}
+
+#[derive(Copy, Clone, Debug, Default, PartialEq)]
+#[repr(C)]
+pub struct Stat {
+    pub st_dev: u64,
+    pub st_ino: u64,
+    pub st_mode: u16,
+    pub st_nlink: u32,
+    pub st_uid: u32,
+    pub st_gid: u32,
+    pub st_size: u64,
+    pub st_blksize: u32,
+    pub st_blocks: u64,
+    pub st_mtime: u64,
+    pub st_mtime_nsec: u32,
+    pub st_atime: u64,
+    pub st_atime_nsec: u32,
+    pub st_ctime: u64,
+    pub st_ctime_nsec: u32,
+}
+
+impl Deref for Stat {
+    type Target = [u8];
+    fn deref(&self) -> &[u8] {
+        unsafe {
+            slice::from_raw_parts(self as *const Stat as *const u8,
+                                  mem::size_of::<Stat>())
+        }
+    }
+}
+
+impl DerefMut for Stat {
+    fn deref_mut(&mut self) -> &mut [u8] {
+        unsafe {
+            slice::from_raw_parts_mut(self as *mut Stat as *mut u8,
+                                      mem::size_of::<Stat>())
+        }
+    }
+}
+
+#[derive(Copy, Clone, Debug, Default, PartialEq)]
+#[repr(C)]
+pub struct StatVfs {
+    pub f_bsize: u32,
+    pub f_blocks: u64,
+    pub f_bfree: u64,
+    pub f_bavail: u64,
+}
+
+impl Deref for StatVfs {
+    type Target = [u8];
+    fn deref(&self) -> &[u8] {
+        unsafe {
+            slice::from_raw_parts(self as *const StatVfs as *const u8,
+                                  mem::size_of::<StatVfs>())
+        }
+    }
+}
+
+impl DerefMut for StatVfs {
+    fn deref_mut(&mut self) -> &mut [u8] {
+        unsafe {
+            slice::from_raw_parts_mut(self as *mut StatVfs as *mut u8,
+                                      mem::size_of::<StatVfs>())
+        }
+    }
+}
+
+#[derive(Copy, Clone, Debug, Default, PartialEq)]
+#[repr(C)]
+pub struct TimeSpec {
+    pub tv_sec: i64,
+    pub tv_nsec: i32,
+}
+
+impl Deref for TimeSpec {
+    type Target = [u8];
+    fn deref(&self) -> &[u8] {
+        unsafe {
+            slice::from_raw_parts(self as *const TimeSpec as *const u8,
+                                  mem::size_of::<TimeSpec>())
+        }
+    }
+}
+
+impl DerefMut for TimeSpec {
+    fn deref_mut(&mut self) -> &mut [u8] {
+        unsafe {
+            slice::from_raw_parts_mut(self as *mut TimeSpec as *mut u8,
+                                      mem::size_of::<TimeSpec>())
+        }
+    }
+}
+
+#[derive(Clone, Copy, Debug, Default)]
+#[repr(C)]
+pub struct PtraceEvent {
+    pub cause: PtraceFlags,
+    pub a: usize,
+    pub b: usize,
+    pub c: usize,
+    pub d: usize,
+    pub e: usize,
+    pub f: usize
+}
+
+impl Deref for PtraceEvent {
+    type Target = [u8];
+    fn deref(&self) -> &[u8] {
+        unsafe {
+            slice::from_raw_parts(self as *const PtraceEvent as *const u8, mem::size_of::<PtraceEvent>())
+        }
+    }
+}
+
+impl DerefMut for PtraceEvent {
+    fn deref_mut(&mut self) -> &mut [u8] {
+        unsafe {
+            slice::from_raw_parts_mut(self as *mut PtraceEvent as *mut u8, mem::size_of::<PtraceEvent>())
+        }
+    }
+}
+
+#[macro_export]
+macro_rules! ptrace_event {
+    ($cause:expr $(, $a:expr $(, $b:expr $(, $c:expr)?)?)?) => {
+        $crate::data::PtraceEvent {
+            cause: $cause,
+            $(a: $a,
+              $(b: $b,
+                $(c: $c,)?
+              )?
+            )?
+            ..Default::default()
+        }
+    }
+}
diff --git a/third_party/rust/redox_syscall/src/error.rs b/third_party/rust/redox_syscall/src/error.rs
new file mode 100644
index 0000000000..9a4b0b5ad3
--- /dev/null
+++ b/third_party/rust/redox_syscall/src/error.rs
@@ -0,0 +1,311 @@
+use core::{fmt, result};
+
+#[derive(Eq, PartialEq)]
+pub struct Error {
+    pub errno: i32,
+}
+
+pub type Result<T, E = Error> = result::Result<T, E>;
+
+impl Error {
+    pub fn new(errno: i32) -> Error {
+        Error { errno: errno }
+    }
+
+    pub fn mux(result: Result<usize>) -> usize {
+        match result {
+            Ok(value) => value,
+            Err(error) => -error.errno as usize,
+        }
+    }
+
+    pub fn demux(value: usize) -> Result<usize> {
+        let errno = -(value as i32);
+        if errno >= 1 && errno < STR_ERROR.len() as i32 {
+            Err(Error::new(errno))
+        } else {
+            Ok(value)
+        }
+    }
+
+    pub fn text(&self) -> &'static str {
+        STR_ERROR.get(self.errno as usize).map(|&x| x).unwrap_or("Unknown Error")
+    }
+}
+
+impl fmt::Debug for Error {
+    fn fmt(&self, f: &mut fmt::Formatter) -> result::Result<(), fmt::Error> {
+        f.write_str(self.text())
+    }
+}
+
+impl fmt::Display for Error {
+    fn fmt(&self, f: &mut fmt::Formatter) -> result::Result<(), fmt::Error> {
+        f.write_str(self.text())
+    }
+}
+
+pub const EPERM: i32 = 1;  /* Operation not permitted */
+pub const ENOENT: i32 = 2;  /* No such file or directory */
+pub const ESRCH: i32 = 3;  /* No such process */
+pub const EINTR: i32 = 4;  /* Interrupted system call */
+pub const EIO: i32 = 5;  /* I/O error */
+pub const ENXIO: i32 = 6;  /* No such device or address */
+pub const E2BIG: i32 = 7;  /* Argument list too long */
+pub const ENOEXEC: i32 = 8;  /* Exec format error */
+pub const EBADF: i32 = 9;  /* Bad file number */
+pub const ECHILD: i32 = 10;  /* No child processes */
+pub const EAGAIN: i32 = 11;  /* Try again */
+pub const ENOMEM: i32 = 12;  /* Out of memory */
+pub const EACCES: i32 = 13;  /* Permission denied */
+pub const EFAULT: i32 = 14;  /* Bad address */
+pub const ENOTBLK: i32 = 15;  /* Block device required */
+pub const EBUSY: i32 = 16;  /* Device or resource busy */
+pub const EEXIST: i32 = 17;  /* File exists */
+pub const EXDEV: i32 = 18;  /* Cross-device link */
+pub const ENODEV: i32 = 19;  /* No such device */
+pub const ENOTDIR: i32 = 20;  /* Not a directory */
+pub const EISDIR: i32 = 21;  /* Is a directory */
+pub const EINVAL: i32 = 22;  /* Invalid argument */
+pub const ENFILE: i32 = 23;  /* File table overflow */
+pub const EMFILE: i32 = 24;  /* Too many open files */
+pub const ENOTTY: i32 = 25;  /* Not a typewriter */
+pub const ETXTBSY: i32 = 26;  /* Text file busy */
+pub const EFBIG: i32 = 27;  /* File too large */
+pub const ENOSPC: i32 = 28;  /* No space left on device */
+pub const ESPIPE: i32 = 29;  /* Illegal seek */
+pub const EROFS: i32 = 30;  /* Read-only file system */
+pub const EMLINK: i32 = 31;  /* Too many links */
+pub const EPIPE: i32 = 32;  /* Broken pipe */
+pub const EDOM: i32 = 33;  /* Math argument out of domain of func */
+pub const ERANGE: i32 = 34;  /* Math result not representable */
+pub const EDEADLK: i32 = 35;  /* Resource deadlock would occur */
+pub const ENAMETOOLONG: i32 = 36;  /* File name too long */
+pub const ENOLCK: i32 = 37;  /* No record locks available */
+pub const ENOSYS: i32 = 38;  /* Function not implemented */
+pub const ENOTEMPTY: i32 = 39;  /* Directory not empty */
+pub const ELOOP: i32 = 40;  /* Too many symbolic links encountered */
+pub const EWOULDBLOCK: i32 = 41;  /* Operation would block */
+pub const ENOMSG: i32 = 42;  /* No message of desired type */
+pub const EIDRM: i32 = 43;  /* Identifier removed */
+pub const ECHRNG: i32 = 44;  /* Channel number out of range */
+pub const EL2NSYNC: i32 = 45;  /* Level 2 not synchronized */
+pub const EL3HLT: i32 = 46;  /* Level 3 halted */
+pub const EL3RST: i32 = 47;  /* Level 3 reset */
+pub const ELNRNG: i32 = 48;  /* Link number out of range */
+pub const EUNATCH: i32 = 49;  /* Protocol driver not attached */
+pub const ENOCSI: i32 = 50;  /* No CSI structure available */
+pub const EL2HLT: i32 = 51;  /* Level 2 halted */
+pub const EBADE: i32 = 52;  /* Invalid exchange */
+pub const EBADR: i32 = 53;  /* Invalid request descriptor */
+pub const EXFULL: i32 = 54;  /* Exchange full */
+pub const ENOANO: i32 = 55;  /* No anode */
+pub const EBADRQC: i32 = 56;  /* Invalid request code */
+pub const EBADSLT: i32 = 57;  /* Invalid slot */
+pub const EDEADLOCK: i32 = 58; /* Resource deadlock would occur */
+pub const EBFONT: i32 = 59;  /* Bad font file format */
+pub const ENOSTR: i32 = 60;  /* Device not a stream */
+pub const ENODATA: i32 = 61;  /* No data available */
+pub const ETIME: i32 = 62;  /* Timer expired */
+pub const ENOSR: i32 = 63;  /* Out of streams resources */
+pub const ENONET: i32 = 64;  /* Machine is not on the network */
+pub const ENOPKG: i32 = 65;  /* Package not installed */
+pub const EREMOTE: i32 = 66;  /* Object is remote */
+pub const ENOLINK: i32 = 67;  /* Link has been severed */
+pub const EADV: i32 = 68;  /* Advertise error */
+pub const ESRMNT: i32 = 69;  /* Srmount error */
+pub const ECOMM: i32 = 70;  /* Communication error on send */
+pub const EPROTO: i32 = 71;  /* Protocol error */
+pub const EMULTIHOP: i32 = 72;  /* Multihop attempted */
+pub const EDOTDOT: i32 = 73;  /* RFS specific error */
+pub const EBADMSG: i32 = 74;  /* Not a data message */
+pub const EOVERFLOW: i32 = 75;  /* Value too large for defined data type */
+pub const ENOTUNIQ: i32 = 76;  /* Name not unique on network */
+pub const EBADFD: i32 = 77;  /* File descriptor in bad state */
+pub const EREMCHG: i32 = 78;  /* Remote address changed */
+pub const ELIBACC: i32 = 79;  /* Can not access a needed shared library */
+pub const ELIBBAD: i32 = 80;  /* Accessing a corrupted shared library */
+pub const ELIBSCN: i32 = 81;  /* .lib section in a.out corrupted */
+pub const ELIBMAX: i32 = 82;  /* Attempting to link in too many shared libraries */
+pub const ELIBEXEC: i32 = 83;  /* Cannot exec a shared library directly */
+pub const EILSEQ: i32 = 84;  /* Illegal byte sequence */
+pub const ERESTART: i32 = 85;  /* Interrupted system call should be restarted */
+pub const ESTRPIPE: i32 = 86;  /* Streams pipe error */
+pub const EUSERS: i32 = 87;  /* Too many users */
+pub const ENOTSOCK: i32 = 88;  /* Socket operation on non-socket */
+pub const EDESTADDRREQ: i32 = 89;  /* Destination address required */
+pub const EMSGSIZE: i32 = 90;  /* Message too long */
+pub const EPROTOTYPE: i32 = 91;  /* Protocol wrong type for socket */
+pub const ENOPROTOOPT: i32 = 92;  /* Protocol not available */
+pub const EPROTONOSUPPORT: i32 = 93;  /* Protocol not supported */
+pub const ESOCKTNOSUPPORT: i32 = 94;  /* Socket type not supported */
+pub const EOPNOTSUPP: i32 = 95;  /* Operation not supported on transport endpoint */
+pub const EPFNOSUPPORT: i32 = 96;  /* Protocol family not supported */
+pub const EAFNOSUPPORT: i32 = 97;  /* Address family not supported by protocol */
+pub const EADDRINUSE: i32 = 98;  /* Address already in use */
+pub const EADDRNOTAVAIL: i32 = 99;  /* Cannot assign requested address */
+pub const ENETDOWN: i32 = 100; /* Network is down */
+pub const ENETUNREACH: i32 = 101; /* Network is unreachable */
+pub const ENETRESET: i32 = 102; /* Network dropped connection because of reset */
+pub const ECONNABORTED: i32 = 103; /* Software caused connection abort */
+pub const ECONNRESET: i32 = 104; /* Connection reset by peer */
+pub const ENOBUFS: i32 = 105; /* No buffer space available */
+pub const EISCONN: i32 = 106; /* Transport endpoint is already connected */
+pub const ENOTCONN: i32 = 107; /* Transport endpoint is not connected */
+pub const ESHUTDOWN: i32 = 108; /* Cannot send after transport endpoint shutdown */
+pub const ETOOMANYREFS: i32 = 109; /* Too many references: cannot splice */
+pub const ETIMEDOUT: i32 = 110; /* Connection timed out */
+pub const ECONNREFUSED: i32 = 111; /* Connection refused */
+pub const EHOSTDOWN: i32 = 112; /* Host is down */
+pub const EHOSTUNREACH: i32 = 113; /* No route to host */
+pub const EALREADY: i32 = 114; /* Operation already in progress */
+pub const EINPROGRESS: i32 = 115; /* Operation now in progress */
+pub const ESTALE: i32 = 116; /* Stale NFS file handle */
+pub const EUCLEAN: i32 = 117; /* Structure needs cleaning */
+pub const ENOTNAM: i32 = 118; /* Not a XENIX named type file */
+pub const ENAVAIL: i32 = 119; /* No XENIX semaphores available */
+pub const EISNAM: i32 = 120; /* Is a named type file */
+pub const EREMOTEIO: i32 = 121; /* Remote I/O error */
+pub const EDQUOT: i32 = 122; /* Quota exceeded */
+pub const ENOMEDIUM: i32 = 123; /* No medium found */
+pub const EMEDIUMTYPE: i32 = 124; /* Wrong medium type */
+pub const ECANCELED: i32 = 125; /* Operation Canceled */
+pub const ENOKEY: i32 = 126; /* Required key not available */
+pub const EKEYEXPIRED: i32 = 127; /* Key has expired */
+pub const EKEYREVOKED: i32 = 128; /* Key has been revoked */
+pub const EKEYREJECTED: i32 = 129; /* Key was rejected by service */
+pub const EOWNERDEAD: i32 = 130; /* Owner died */
+pub const ENOTRECOVERABLE: i32 = 131; /* State not recoverable */
+
+pub static STR_ERROR: [&'static str; 132] = ["Success",
+                                             "Operation not permitted",
+                                             "No such file or directory",
+                                             "No such process",
+                                             "Interrupted system call",
+                                             "I/O error",
+                                             "No such device or address",
+                                             "Argument list too long",
+                                             "Exec format error",
+                                             "Bad file number",
+                                             "No child processes",
+                                             "Try again",
+                                             "Out of memory",
+                                             "Permission denied",
+                                             "Bad address",
+                                             "Block device required",
+                                             "Device or resource busy",
+                                             "File exists",
+                                             "Cross-device link",
+                                             "No such device",
+                                             "Not a directory",
+                                             "Is a directory",
+                                             "Invalid argument",
+                                             "File table overflow",
+                                             "Too many open files",
+                                             "Not a typewriter",
+                                             "Text file busy",
+                                             "File too large",
+                                             "No space left on device",
+                                             "Illegal seek",
+                                             "Read-only file system",
+                                             "Too many links",
+                                             "Broken pipe",
+                                             "Math argument out of domain of func",
+                                             "Math result not representable",
+                                             "Resource deadlock would occur",
+                                             "File name too long",
+                                             "No record locks available",
+                                             "Function not implemented",
+                                             "Directory not empty",
+                                             "Too many symbolic links encountered",
+                                             "Operation would block",
+                                             "No message of desired type",
+                                             "Identifier removed",
+                                             "Channel number out of range",
+                                             "Level 2 not synchronized",
+                                             "Level 3 halted",
+                                             "Level 3 reset",
+                                             "Link number out of range",
+                                             "Protocol driver not attached",
+                                             "No CSI structure available",
+                                             "Level 2 halted",
+                                             "Invalid exchange",
+                                             "Invalid request descriptor",
+                                             "Exchange full",
+                                             "No anode",
+                                             "Invalid request code",
+                                             "Invalid slot",
+                                             "Resource deadlock would occur",
+                                             "Bad font file format",
+                                             "Device not a stream",
+                                             "No data available",
+                                             "Timer expired",
+                                             "Out of streams resources",
+                                             "Machine is not on the network",
+                                             "Package not installed",
+                                             "Object is remote",
+                                             "Link has been severed",
+                                             "Advertise error",
+                                             "Srmount error",
+                                             "Communication error on send",
+                                             "Protocol error",
+                                             "Multihop attempted",
+                                             "RFS specific error",
+                                             "Not a data message",
+                                             "Value too large for defined data type",
+                                             "Name not unique on network",
+                                             "File descriptor in bad state",
+                                             "Remote address changed",
+                                             "Can not access a needed shared library",
+                                             "Accessing a corrupted shared library",
+                                             ".lib section in a.out corrupted",
+                                             "Attempting to link in too many shared libraries",
+                                             "Cannot exec a shared library directly",
+                                             "Illegal byte sequence",
+                                             "Interrupted system call should be restarted",
+                                             "Streams pipe error",
+                                             "Too many users",
+                                             "Socket operation on non-socket",
+                                             "Destination address required",
+                                             "Message too long",
+                                             "Protocol wrong type for socket",
+                                             "Protocol not available",
+                                             "Protocol not supported",
+                                             "Socket type not supported",
+                                             "Operation not supported on transport endpoint",
+                                             "Protocol family not supported",
+                                             "Address family not supported by protocol",
+                                             "Address already in use",
+                                             "Cannot assign requested address",
+                                             "Network is down",
+                                             "Network is unreachable",
+                                             "Network dropped connection because of reset",
+                                             "Software caused connection abort",
+                                             "Connection reset by peer",
+                                             "No buffer space available",
+                                             "Transport endpoint is already connected",
+                                             "Transport endpoint is not connected",
+                                             "Cannot send after transport endpoint shutdown",
+                                             "Too many references: cannot splice",
+                                             "Connection timed out",
+                                             "Connection refused",
+                                             "Host is down",
+                                             "No route to host",
+                                             "Operation already in progress",
+                                             "Operation now in progress",
+                                             "Stale NFS file handle",
+                                             "Structure needs cleaning",
+                                             "Not a XENIX named type file",
+                                             "No XENIX semaphores available",
+                                             "Is a named type file",
+                                             "Remote I/O error",
+                                             "Quota exceeded",
+                                             "No medium found",
+                                             "Wrong medium type",
+                                             "Operation Canceled",
+                                             "Required key not available",
+                                             "Key has expired",
+                                             "Key has been revoked",
+                                             "Key was rejected by service",
+                                             "Owner died",
+                                             "State not recoverable"];
diff --git a/third_party/rust/redox_syscall/src/flag.rs b/third_party/rust/redox_syscall/src/flag.rs
new file mode 100644
index 0000000000..9788884afa
--- /dev/null
+++ b/third_party/rust/redox_syscall/src/flag.rs
@@ -0,0 +1,348 @@
+use bitflags::bitflags as inner_bitflags;
+use core::{mem, ops::Deref, slice};
+
+macro_rules! bitflags {
+    (
+        $(#[$outer:meta])*
+        pub struct $BitFlags:ident: $T:ty {
+            $(
+                $(#[$inner:ident $($args:tt)*])*
+                const $Flag:ident = $value:expr;
+            )+
+        }
+    ) => {
+        // First, use the inner bitflags
+        inner_bitflags! {
+            #[derive(Default)]
+            $(#[$outer])*
+            pub struct $BitFlags: $T {
+                $(
+                    $(#[$inner $($args)*])*
+                    const $Flag = $value;
+                )+
+            }
+        }
+
+        // Secondly, re-export all inner constants
+        // (`pub use self::Struct::*` doesn't work)
+        $(
+            $(#[$inner $($args)*])*
+            pub const $Flag: $BitFlags = $BitFlags::$Flag;
+        )+
+    }
+}
+
+bitflags! {
+    pub struct CloneFlags: usize {
+        const CLONE_VM = 0x100;
+        const CLONE_FS = 0x200;
+        const CLONE_FILES = 0x400;
+        const CLONE_SIGHAND = 0x800;
+        const CLONE_VFORK = 0x4000;
+        const CLONE_THREAD = 0x10000;
+        const CLONE_STACK = 0x1000_0000;
+    }
+}
+
+pub const CLOCK_REALTIME: usize = 1;
+pub const CLOCK_MONOTONIC: usize = 4;
+
+bitflags! {
+    pub struct EventFlags: usize {
+        const EVENT_NONE = 0;
+        const EVENT_READ = 1;
+        const EVENT_WRITE = 2;
+    }
+}
+
+pub const F_DUPFD: usize = 0;
+pub const F_GETFD: usize = 1;
+pub const F_SETFD: usize = 2;
+pub const F_GETFL: usize = 3;
+pub const F_SETFL: usize = 4;
+
+pub const FUTEX_WAIT: usize = 0;
+pub const FUTEX_WAKE: usize = 1;
+pub const FUTEX_REQUEUE: usize = 2;
+pub const FUTEX_WAIT64: usize = 3;
+
+bitflags! {
+    pub struct MapFlags: usize {
+        const PROT_NONE = 0x0000_0000;
+        const PROT_EXEC = 0x0001_0000;
+        const PROT_WRITE = 0x0002_0000;
+        const PROT_READ = 0x0004_0000;
+
+        const MAP_SHARED = 0x0001;
+        const MAP_PRIVATE = 0x0002;
+
+        /// Only accepted for mmap2(2).
+        const MAP_FIXED = 0x0004;
+        const MAP_FIXED_NOREPLACE = 0x000C;
+    }
+}
+
+pub const MODE_TYPE: u16 = 0xF000;
+pub const MODE_DIR: u16 = 0x4000;
+pub const MODE_FILE: u16 = 0x8000;
+pub const MODE_SYMLINK: u16 = 0xA000;
+pub const MODE_FIFO: u16 = 0x1000;
+pub const MODE_CHR: u16 = 0x2000;
+
+pub const MODE_PERM: u16 = 0x0FFF;
+pub const MODE_SETUID: u16 = 0o4000;
+pub const MODE_SETGID: u16 = 0o2000;
+
+pub const O_RDONLY: usize =     0x0001_0000;
+pub const O_WRONLY: usize =     0x0002_0000;
+pub const O_RDWR: usize =       0x0003_0000;
+pub const O_NONBLOCK: usize =   0x0004_0000;
+pub const O_APPEND: usize =     0x0008_0000;
+pub const O_SHLOCK: usize =     0x0010_0000;
+pub const O_EXLOCK: usize =     0x0020_0000;
+pub const O_ASYNC: usize =      0x0040_0000;
+pub const O_FSYNC: usize =      0x0080_0000;
+pub const O_CLOEXEC: usize =    0x0100_0000;
+pub const O_CREAT: usize =      0x0200_0000;
+pub const O_TRUNC: usize =      0x0400_0000;
+pub const O_EXCL: usize =       0x0800_0000;
+pub const O_DIRECTORY: usize =  0x1000_0000;
+pub const O_STAT: usize =       0x2000_0000;
+pub const O_SYMLINK: usize =    0x4000_0000;
+pub const O_NOFOLLOW: usize =   0x8000_0000;
+pub const O_ACCMODE: usize =    O_RDONLY | O_WRONLY | O_RDWR;
+
+bitflags! {
+    pub struct PhysmapFlags: usize {
+        const PHYSMAP_WRITE = 0x0000_0001;
+        const PHYSMAP_WRITE_COMBINE = 0x0000_0002;
+        const PHYSMAP_NO_CACHE = 0x0000_0004;
+    }
+}
+bitflags! {
+    /// Extra flags for [`physalloc2`] or [`physalloc3`].
+    ///
+    /// [`physalloc2`]: ../call/fn.physalloc2.html
+    /// [`physalloc3`]: ../call/fn.physalloc3.html
+    pub struct PhysallocFlags: usize {
+        /// Only allocate memory within the 32-bit physical memory space. This is necessary for
+        /// some devices may not support 64-bit memory.
+        const SPACE_32 =        0x0000_0001;
+
+        /// The frame that will be allocated, is going to reside anywhere in 64-bit space. This
+        /// flag is redundant for the most part, except when overriding some other default.
+        const SPACE_64 =        0x0000_0002;
+
+        /// Do a "partial allocation", which means that not all of the frames specified in the
+        /// frame count `size` actually have to be allocated. This means that if the allocator was
+        /// unable to find a physical memory range large enough, it can instead return whatever
+        /// range it decides is optimal. Thus, instead of letting one driver get an expensive
+        /// 128MiB physical memory range when the physical memory has become fragmented, and
+        /// failing, it can instead be given a more optimal range. If the device supports
+        /// scatter-gather lists, then the driver only has to allocate more ranges, and the device
+        /// will do vectored I/O.
+        ///
+        /// PARTIAL_ALLOC supports different allocation strategies, refer to
+        /// [`Optimal`], [`GreatestRange`].
+        ///
+        /// [`Optimal`]: ./enum.PartialAllocStrategy.html
+        /// [`GreatestRange`]: ./enum.PartialAllocStrategy.html
+        const PARTIAL_ALLOC =   0x0000_0004;
+    }
+}
+
+/// The bitmask of the partial allocation strategy. Currently four different strategies are
+/// supported. If [`PARTIAL_ALLOC`] is not set, this bitmask is no longer reserved.
+pub const PARTIAL_ALLOC_STRATEGY_MASK: usize = 0x0003_0000;
+
+#[derive(Clone, Copy, Debug, Eq, Hash, PartialEq)]
+#[repr(usize)]
+pub enum PartialAllocStrategy {
+    /// The allocator decides itself the size of the memory range, based on e.g. free memory ranges
+    /// and other processes which require large physical memory chunks.
+    Optimal = 0x0001_0000,
+
+    /// The allocator returns the absolute greatest range it can find.
+    GreatestRange = 0x0002_0000,
+
+    /// The allocator returns the first range that fits the minimum count, without searching extra.
+    Greedy = 0x0003_0000,
+}
+impl Default for PartialAllocStrategy {
+    fn default() -> Self {
+        Self::Optimal
+    }
+}
+
+impl PartialAllocStrategy {
+    pub fn from_raw(raw: usize) -> Option<Self> {
+        match raw {
+            0x0001_0000 => Some(Self::Optimal),
+            0x0002_0000 => Some(Self::GreatestRange),
+            0x0003_0000 => Some(Self::Greedy),
+            _ => None,
+        }
+    }
+}
+
+// The top 48 bits of PTRACE_* are reserved, for now
+
+bitflags! {
+    pub struct PtraceFlags: u64 {
+        /// Stop before a syscall is handled. Send PTRACE_FLAG_IGNORE to not
+        /// handle the syscall.
+        const PTRACE_STOP_PRE_SYSCALL = 0x0000_0000_0000_0001;
+        /// Stop after a syscall is handled.
+        const PTRACE_STOP_POST_SYSCALL = 0x0000_0000_0000_0002;
+        /// Stop after exactly one instruction. TODO: This may not handle
+        /// fexec/signal boundaries. Should it?
+        const PTRACE_STOP_SINGLESTEP = 0x0000_0000_0000_0004;
+        /// Stop before a signal is handled. Send PTRACE_FLAG_IGNORE to not
+        /// handle signal.
+        const PTRACE_STOP_SIGNAL = 0x0000_0000_0000_0008;
+        /// Stop on a software breakpoint, such as the int3 instruction for
+        /// x86_64.
+        const PTRACE_STOP_BREAKPOINT = 0x0000_0000_0000_0010;
+        /// Stop just before exiting for good.
+        const PTRACE_STOP_EXIT = 0x0000_0000_0000_0020;
+
+        const PTRACE_STOP_MASK = 0x0000_0000_0000_00FF;
+
+
+        /// Sent when a child is cloned, giving you the opportunity to trace it.
+        /// If you don't catch this, the child is started as normal.
+        const PTRACE_EVENT_CLONE = 0x0000_0000_0000_0100;
+
+        const PTRACE_EVENT_MASK = 0x0000_0000_0000_0F00;
+
+
+        /// Special meaning, depending on the event. Usually, when fired before
+        /// an action, it will skip performing that action.
+        const PTRACE_FLAG_IGNORE = 0x0000_0000_0000_1000;
+
+        const PTRACE_FLAG_MASK = 0x0000_0000_0000_F000;
+    }
+}
+impl Deref for PtraceFlags {
+    type Target = [u8];
+    fn deref(&self) -> &Self::Target {
+        // Same as to_ne_bytes but in-place
+        unsafe {
+            slice::from_raw_parts(
+                &self.bits as *const _ as *const u8,
+                mem::size_of::<u64>()
+            )
+        }
+    }
+}
+
+pub const SEEK_SET: usize = 0;
+pub const SEEK_CUR: usize = 1;
+pub const SEEK_END: usize = 2;
+
+pub const SIGHUP: usize =   1;
+pub const SIGINT: usize =   2;
+pub const SIGQUIT: usize =  3;
+pub const SIGILL: usize =   4;
+pub const SIGTRAP: usize =  5;
+pub const SIGABRT: usize =  6;
+pub const SIGBUS: usize =   7;
+pub const SIGFPE: usize =   8;
+pub const SIGKILL: usize =  9;
+pub const SIGUSR1: usize =  10;
+pub const SIGSEGV: usize =  11;
+pub const SIGUSR2: usize =  12;
+pub const SIGPIPE: usize =  13;
+pub const SIGALRM: usize =  14;
+pub const SIGTERM: usize =  15;
+pub const SIGSTKFLT: usize= 16;
+pub const SIGCHLD: usize =  17;
+pub const SIGCONT: usize =  18;
+pub const SIGSTOP: usize =  19;
+pub const SIGTSTP: usize =  20;
+pub const SIGTTIN: usize =  21;
+pub const SIGTTOU: usize =  22;
+pub const SIGURG: usize =   23;
+pub const SIGXCPU: usize =  24;
+pub const SIGXFSZ: usize =  25;
+pub const SIGVTALRM: usize= 26;
+pub const SIGPROF: usize =  27;
+pub const SIGWINCH: usize = 28;
+pub const SIGIO: usize =    29;
+pub const SIGPWR: usize =   30;
+pub const SIGSYS: usize =   31;
+
+pub const SIG_DFL: usize = 0;
+pub const SIG_IGN: usize = 1;
+
+pub const SIG_BLOCK: usize = 0;
+pub const SIG_UNBLOCK: usize = 1;
+pub const SIG_SETMASK: usize = 2;
+
+bitflags! {
+    pub struct SigActionFlags: usize {
+        const SA_NOCLDSTOP = 0x00000001;
+        const SA_NOCLDWAIT = 0x00000002;
+        const SA_SIGINFO =   0x00000004;
+        const SA_RESTORER =  0x04000000;
+        const SA_ONSTACK =   0x08000000;
+        const SA_RESTART =   0x10000000;
+        const SA_NODEFER =   0x40000000;
+        const SA_RESETHAND = 0x80000000;
+    }
+}
+
+// Auxiliery vector types
+pub const AT_NULL: usize = 0;
+pub const AT_PHDR: usize = 3;
+pub const AT_PHENT: usize = 4;
+pub const AT_PHNUM: usize = 5;
+pub const AT_ENTRY: usize = 9;
+
+bitflags! {
+    pub struct WaitFlags: usize {
+        const WNOHANG =    0x01;
+        const WUNTRACED =  0x02;
+        const WCONTINUED = 0x08;
+    }
+}
+
+/// True if status indicates the child is stopped.
+pub fn wifstopped(status: usize) -> bool {
+    (status & 0xff) == 0x7f
+}
+
+/// If wifstopped(status), the signal that stopped the child.
+pub fn wstopsig(status: usize) -> usize {
+    (status >> 8) & 0xff
+}
+
+/// True if status indicates the child continued after a stop.
+pub fn wifcontinued(status: usize) -> bool {
+    status == 0xffff
+}
+
+/// True if STATUS indicates termination by a signal.
+pub fn wifsignaled(status: usize) -> bool {
+    ((status & 0x7f) + 1) as i8 >= 2
+}
+
+/// If wifsignaled(status), the terminating signal.
+pub fn wtermsig(status: usize) -> usize {
+    status & 0x7f
+}
+
+/// True if status indicates normal termination.
+pub fn wifexited(status: usize) -> bool {
+    wtermsig(status) == 0
+}
+
+/// If wifexited(status), the exit status.
+pub fn wexitstatus(status: usize) -> usize {
+    (status >> 8) & 0xff
+}
+
+/// True if status indicates a core dump was created.
+pub fn wcoredump(status: usize) -> bool {
+    (status & 0x80) != 0
+}
diff --git a/third_party/rust/redox_syscall/src/io/dma.rs b/third_party/rust/redox_syscall/src/io/dma.rs
new file mode 100644
index 0000000000..b356c8abe9
--- /dev/null
+++ b/third_party/rust/redox_syscall/src/io/dma.rs
@@ -0,0 +1,200 @@
+use core::mem::{self, MaybeUninit};
+use core::ops::{Deref, DerefMut};
+use core::{ptr, slice};
+
+use crate::Result;
+use crate::{PartialAllocStrategy, PhysallocFlags};
+
+/// An RAII guard of a physical memory allocation. Currently all physically allocated memory are
+/// page-aligned and take up at least 4k of space (on x86_64).
+#[derive(Debug)]
+pub struct PhysBox {
+    address: usize,
+    size: usize
+}
+
+impl PhysBox {
+    /// Construct a PhysBox from an address and a size.
+    ///
+    /// # Safety
+    /// This function is unsafe because when dropping, Self has to a valid allocation.
+    pub unsafe fn from_raw_parts(address: usize, size: usize) -> Self {
+        Self {
+            address,
+            size,
+        }
+    }
+
+    /// Retrieve the byte address in physical memory, of this allocation.
+    pub fn address(&self) -> usize {
+        self.address
+    }
+
+    /// Retrieve the size in bytes of the alloc.
+    pub fn size(&self) -> usize {
+        self.size
+    }
+
+    /// Allocate physical memory that must reside in 32-bit space.
+    pub fn new_in_32bit_space(size: usize) -> Result<Self> {
+        Self::new_with_flags(size, PhysallocFlags::SPACE_32)
+    }
+
+    pub fn new_with_flags(size: usize, flags: PhysallocFlags) -> Result<Self> {
+        assert!(!flags.contains(PhysallocFlags::PARTIAL_ALLOC));
+
+        let address = unsafe { crate::physalloc2(size, flags.bits())? };
+        Ok(Self {
+            address,
+            size,
+        })
+    }
+
+    /// "Partially" allocate physical memory, in the sense that the allocation may be smaller than
+    /// expected, but still with a minimum limit. This is particularly useful when the physical
+    /// memory space is fragmented, and a device supports scatter-gather I/O. In that case, the
+    /// driver can optimistically request e.g. 1 alloc of 1 MiB, with the minimum of 512 KiB. If
+    /// that first allocation only returns half the size, the driver can do another allocation
+    /// and then let the device use both buffers.
+    pub fn new_partial_allocation(size: usize, flags: PhysallocFlags, strategy: Option<PartialAllocStrategy>, mut min: usize) -> Result<Self> {
+        debug_assert!(!(flags.contains(PhysallocFlags::PARTIAL_ALLOC) && strategy.is_none()));
+
+        let address = unsafe { crate::physalloc3(size, flags.bits() | strategy.map(|s| s as usize).unwrap_or(0), &mut min)? };
+        Ok(Self {
+            address,
+            size: min,
+        })
+    }
+
+    pub fn new(size: usize) -> Result<Self> {
+        let address = unsafe { crate::physalloc(size)? };
+        Ok(Self {
+            address,
+            size,
+        })
+    }
+}
+
+impl Drop for PhysBox {
+    fn drop(&mut self) {
+        let _ = unsafe { crate::physfree(self.address, self.size) };
+    }
+}
+
+pub struct Dma<T: ?Sized> {
+    phys: PhysBox,
+    virt: *mut T,
+}
+
+impl<T> Dma<T> {
+    pub fn from_physbox_uninit(phys: PhysBox) -> Result<Dma<MaybeUninit<T>>> {
+        let virt = unsafe { crate::physmap(phys.address, phys.size, crate::PHYSMAP_WRITE)? } as *mut MaybeUninit<T>;
+
+        Ok(Dma {
+            phys,
+            virt,
+        })
+    }
+    pub fn from_physbox_zeroed(phys: PhysBox) -> Result<Dma<MaybeUninit<T>>> {
+        let this = Self::from_physbox_uninit(phys)?;
+        unsafe { ptr::write_bytes(this.virt as *mut MaybeUninit<u8>, 0, this.phys.size) }
+        Ok(this)
+    }
+
+    pub fn from_physbox(phys: PhysBox, value: T) -> Result<Self> {
+        let this = Self::from_physbox_uninit(phys)?;
+
+        Ok(unsafe {
+            ptr::write(this.virt, MaybeUninit::new(value));
+            this.assume_init()
+        })
+    }
+
+    pub fn new(value: T) -> Result<Self> {
+        let phys = PhysBox::new(mem::size_of::<T>())?;
+        Self::from_physbox(phys, value)
+    }
+    pub fn zeroed() -> Result<Dma<MaybeUninit<T>>> {
+        let phys = PhysBox::new(mem::size_of::<T>())?;
+        Self::from_physbox_zeroed(phys)
+    }
+}
+
+impl<T> Dma<MaybeUninit<T>> {
+    pub unsafe fn assume_init(self) -> Dma<T> {
+        let &Dma { phys: PhysBox { address, size }, virt } = &self;
+        mem::forget(self);
+
+        Dma {
+            phys: PhysBox { address, size },
+            virt: virt as *mut T,
+        }
+    }
+}
+impl<T: ?Sized> Dma<T> {
+    pub fn physical(&self) -> usize {
+        self.phys.address()
+    }
+    pub fn size(&self) -> usize {
+        self.phys.size()
+    }
+    pub fn phys(&self) -> &PhysBox {
+        &self.phys
+    }
+}
+
+impl<T> Dma<[T]> {
+    pub fn from_physbox_uninit_unsized(phys: PhysBox, len: usize) -> Result<Dma<[MaybeUninit<T>]>> {
+        let max_len = phys.size() / mem::size_of::<T>();
+        assert!(len <= max_len);
+
+        Ok(Dma {
+            virt: unsafe { slice::from_raw_parts_mut(crate::physmap(phys.address, phys.size, crate::PHYSMAP_WRITE)? as *mut MaybeUninit<T>, len) } as *mut [MaybeUninit<T>],
+            phys,
+        })
+    }
+    pub fn from_physbox_zeroed_unsized(phys: PhysBox, len: usize) -> Result<Dma<[MaybeUninit<T>]>> {
+        let this = Self::from_physbox_uninit_unsized(phys, len)?;
+        unsafe { ptr::write_bytes(this.virt as *mut MaybeUninit<u8>, 0, this.phys.size()) }
+        Ok(this)
+    }
+    /// Creates a new DMA buffer with a size only known at runtime.
+    /// ## Safety
+    /// * `T` must be properly aligned.
+    /// * `T` must be valid as zeroed (i.e. no NonNull pointers).
+    pub unsafe fn zeroed_unsized(count: usize) -> Result<Self> {
+        let phys = PhysBox::new(mem::size_of::<T>() * count)?;
+        Ok(Self::from_physbox_zeroed_unsized(phys, count)?.assume_init())
+    }
+}
+impl<T> Dma<[MaybeUninit<T>]> {
+    pub unsafe fn assume_init(self) -> Dma<[T]> {
+        let &Dma { phys: PhysBox { address, size }, virt } = &self;
+        mem::forget(self);
+
+        Dma {
+            phys: PhysBox { address, size },
+            virt: virt as *mut [T],
+        }
+    }
+}
+
+impl<T: ?Sized> Deref for Dma<T> {
+    type Target = T;
+    fn deref(&self) -> &T {
+        unsafe { &*self.virt }
+    }
+}
+
+impl<T: ?Sized> DerefMut for Dma<T> {
+    fn deref_mut(&mut self) -> &mut T {
+        unsafe { &mut *self.virt }
+    }
+}
+
+impl<T: ?Sized> Drop for Dma<T> {
+    fn drop(&mut self) {
+        unsafe { ptr::drop_in_place(self.virt) }
+        let _ = unsafe { crate::physunmap(self.virt as *mut u8 as usize) };
+    }
+}
diff --git a/third_party/rust/redox_syscall/src/io/io.rs b/third_party/rust/redox_syscall/src/io/io.rs
new file mode 100644
index 0000000000..2c4acd3883
--- /dev/null
+++ b/third_party/rust/redox_syscall/src/io/io.rs
@@ -0,0 +1,71 @@
+use core::cmp::PartialEq;
+use core::ops::{BitAnd, BitOr, Not};
+
+pub trait Io {
+    type Value: Copy + PartialEq + BitAnd<Output = Self::Value> + BitOr<Output = Self::Value> + Not<Output = Self::Value>;
+
+    fn read(&self) -> Self::Value;
+    fn write(&mut self, value: Self::Value);
+
+    #[inline(always)]
+    fn readf(&self, flags: Self::Value) -> bool  {
+        (self.read() & flags) as Self::Value == flags
+    }
+
+    #[inline(always)]
+    fn writef(&mut self, flags: Self::Value, value: bool) {
+        let tmp: Self::Value = match value {
+            true => self.read() | flags,
+            false => self.read() & !flags,
+        };
+        self.write(tmp);
+    }
+}
+
+pub struct ReadOnly<I> {
+    inner: I
+}
+
+impl<I> ReadOnly<I> {
+    pub const fn new(inner: I) -> ReadOnly<I> {
+        ReadOnly {
+            inner: inner
+        }
+    }
+}
+
+impl<I: Io> ReadOnly<I> {
+    #[inline(always)]
+    pub fn read(&self) -> I::Value {
+        self.inner.read()
+    }
+
+    #[inline(always)]
+    pub fn readf(&self, flags: I::Value) -> bool {
+        self.inner.readf(flags)
+    }
+}
+
+pub struct WriteOnly<I> {
+    inner: I
+}
+
+impl<I> WriteOnly<I> {
+    pub const fn new(inner: I) -> WriteOnly<I> {
+        WriteOnly {
+            inner: inner
+        }
+    }
+}
+
+impl<I: Io> WriteOnly<I> {
+    #[inline(always)]
+    pub fn write(&mut self, value: I::Value) {
+        self.inner.write(value)
+    }
+
+    #[inline(always)]
+    pub fn writef(&mut self, flags: I::Value, value: bool) {
+        self.inner.writef(flags, value)
+    }
+}
diff --git a/third_party/rust/redox_syscall/src/io/mmio.rs b/third_party/rust/redox_syscall/src/io/mmio.rs
new file mode 100644
index 0000000000..3966ab4546
--- /dev/null
+++ b/third_party/rust/redox_syscall/src/io/mmio.rs
@@ -0,0 +1,45 @@
+use core::ptr::{read_volatile, write_volatile, addr_of, addr_of_mut};
+use core::mem::MaybeUninit;
+use core::ops::{BitAnd, BitOr, Not};
+
+use super::io::Io;
+
+#[repr(packed)]
+pub struct Mmio<T> {
+    value: MaybeUninit<T>,
+}
+
+impl<T> Mmio<T> {
+    /// Create a new Mmio without initializing
+    #[deprecated = "unsound because it's possible to read even though it's uninitialized"]
+    pub fn new() -> Self {
+        unsafe { Self::uninit() }
+    }
+    pub unsafe fn zeroed() -> Self {
+        Self {
+            value: MaybeUninit::zeroed(),
+        }
+    }
+    pub unsafe fn uninit() -> Self {
+        Self {
+            value: MaybeUninit::uninit(),
+        }
+    }
+    pub const fn from(value: T) -> Self {
+        Self {
+            value: MaybeUninit::new(value),
+        }
+    }
+}
+
+impl<T> Io for Mmio<T> where T: Copy + PartialEq + BitAnd<Output = T> + BitOr<Output = T> + Not<Output = T> {
+    type Value = T;
+
+    fn read(&self) -> T {
+        unsafe { read_volatile(addr_of!(self.value).cast::<T>()) }
+    }
+
+    fn write(&mut self, value: T) {
+        unsafe { write_volatile(addr_of_mut!(self.value).cast::<T>(), value) };
+    }
+}
diff --git a/third_party/rust/redox_syscall/src/io/mod.rs b/third_party/rust/redox_syscall/src/io/mod.rs
new file mode 100644
index 0000000000..a225f0650b
--- /dev/null
+++ b/third_party/rust/redox_syscall/src/io/mod.rs
@@ -0,0 +1,15 @@
+//! I/O functions
+
+pub use self::dma::*;
+pub use self::io::*;
+pub use self::mmio::*;
+
+#[cfg(any(target_arch = "x86", target_arch = "x86_64"))]
+pub use self::pio::*;
+
+mod dma;
+mod io;
+mod mmio;
+
+#[cfg(any(target_arch = "x86", target_arch = "x86_64"))]
+mod pio;
diff --git a/third_party/rust/redox_syscall/src/io/pio.rs b/third_party/rust/redox_syscall/src/io/pio.rs
new file mode 100644
index 0000000000..8b837bcdf1
--- /dev/null
+++ b/third_party/rust/redox_syscall/src/io/pio.rs
@@ -0,0 +1,90 @@
+use core::arch::asm;
+use core::marker::PhantomData;
+
+use super::io::Io;
+
+/// Generic PIO
+#[derive(Copy, Clone)]
+pub struct Pio<T> {
+    port: u16,
+    value: PhantomData<T>,
+}
+
+impl<T> Pio<T> {
+    /// Create a PIO from a given port
+    pub const fn new(port: u16) -> Self {
+        Pio::<T> {
+            port,
+            value: PhantomData,
+        }
+    }
+}
+
+/// Read/Write for byte PIO
+impl Io for Pio<u8> {
+    type Value = u8;
+
+    /// Read
+    #[inline(always)]
+    fn read(&self) -> u8 {
+        let value: u8;
+        unsafe {
+            asm!("in al, dx", in("dx") self.port, out("al") value, options(nostack, nomem, preserves_flags));
+        }
+        value
+    }
+
+    /// Write
+    #[inline(always)]
+    fn write(&mut self, value: u8) {
+        unsafe {
+            asm!("out dx, al", in("dx") self.port, in("al") value, options(nostack, nomem, preserves_flags));
+        }
+    }
+}
+
+/// Read/Write for word PIO
+impl Io for Pio<u16> {
+    type Value = u16;
+
+    /// Read
+    #[inline(always)]
+    fn read(&self) -> u16 {
+        let value: u16;
+        unsafe {
+            asm!("in ax, dx", in("dx") self.port, out("ax") value, options(nostack, nomem, preserves_flags));
+        }
+        value
+    }
+
+    /// Write
+    #[inline(always)]
+    fn write(&mut self, value: u16) {
+        unsafe {
+            asm!("out dx, ax", in("dx") self.port, in("ax") value, options(nostack, nomem, preserves_flags));
+        }
+    }
+}
+
+/// Read/Write for doubleword PIO
+impl Io for Pio<u32> {
+    type Value = u32;
+
+    /// Read
+    #[inline(always)]
+    fn read(&self) -> u32 {
+        let value: u32;
+        unsafe {
+            asm!("in eax, dx", in("dx") self.port, out("eax") value, options(nostack, nomem, preserves_flags));
+        }
+        value
+    }
+
+    /// Write
+    #[inline(always)]
+    fn write(&mut self, value: u32) {
+        unsafe {
+            asm!("out dx, eax", in("dx") self.port, in("eax") value, options(nostack, nomem, preserves_flags));
+        }
+    }
+}
diff --git a/third_party/rust/redox_syscall/src/lib.rs b/third_party/rust/redox_syscall/src/lib.rs
new file mode 100644
index 0000000000..9c59398302
--- /dev/null
+++ b/third_party/rust/redox_syscall/src/lib.rs
@@ -0,0 +1,65 @@
+#![cfg_attr(not(test), no_std)]
+
+#[cfg(test)]
+extern crate core;
+
+pub use self::arch::*;
+pub use self::call::*;
+pub use self::daemon::*;
+pub use self::data::*;
+pub use self::error::*;
+pub use self::flag::*;
+pub use self::io::*;
+pub use self::number::*;
+pub use self::scheme::*;
+
+#[cfg(all(any(target_os = "none", target_os = "redox"), target_arch = "arm"))]
+#[path="arch/nonredox.rs"]
+mod arch;
+
+#[cfg(all(any(target_os = "none", target_os = "redox"), target_arch = "aarch64"))]
+#[path="arch/aarch64.rs"]
+mod arch;
+
+#[cfg(all(any(target_os = "none", target_os = "redox"), target_arch = "riscv64"))]
+#[path="arch/riscv64.rs"]
+mod arch;
+
+#[cfg(all(any(target_os = "none", target_os = "redox"), target_arch = "x86"))]
+#[path="arch/x86.rs"]
+mod arch;
+
+#[cfg(all(any(target_os = "none", target_os = "redox"), target_arch = "x86_64"))]
+#[path="arch/x86_64.rs"]
+mod arch;
+
+#[cfg(not(any(target_os = "none", target_os = "redox")))]
+#[path="arch/nonredox.rs"]
+mod arch;
+
+/// Function definitions
+pub mod call;
+
+/// Complex structures that are used for some system calls
+pub mod data;
+
+/// Wrapper to make daemons easier to write
+pub mod daemon;
+
+/// All errors that can be generated by a system call
+pub mod error;
+
+/// Flags used as an argument to many system calls
+pub mod flag;
+
+/// Functions for low level hardware control
+pub mod io;
+
+/// Call numbers used by each system call
+pub mod number;
+
+/// A trait useful for scheme handlers
+pub mod scheme;
+
+#[cfg(test)]
+mod tests;
diff --git a/third_party/rust/redox_syscall/src/number.rs b/third_party/rust/redox_syscall/src/number.rs
new file mode 100644
index 0000000000..1f037eb19b
--- /dev/null
+++ b/third_party/rust/redox_syscall/src/number.rs
@@ -0,0 +1,78 @@
+pub const SYS_CLASS: usize =    0xF000_0000;
+pub const SYS_CLASS_PATH: usize=0x1000_0000;
+pub const SYS_CLASS_FILE: usize=0x2000_0000;
+
+pub const SYS_ARG: usize =      0x0F00_0000;
+pub const SYS_ARG_SLICE: usize =0x0100_0000;
+pub const SYS_ARG_MSLICE: usize=0x0200_0000;
+pub const SYS_ARG_PATH: usize = 0x0300_0000;
+
+pub const SYS_RET: usize =      0x00F0_0000;
+pub const SYS_RET_FILE: usize = 0x0010_0000;
+
+pub const SYS_LINK: usize =     SYS_CLASS_PATH | SYS_ARG_PATH | 9;
+pub const SYS_OPEN: usize =     SYS_CLASS_PATH | SYS_RET_FILE | 5;
+pub const SYS_CHMOD: usize =    SYS_CLASS_PATH | 15;
+pub const SYS_RMDIR: usize =    SYS_CLASS_PATH | 84;
+pub const SYS_UNLINK: usize =   SYS_CLASS_PATH | 10;
+
+pub const SYS_CLOSE: usize =      SYS_CLASS_FILE | 6;
+pub const SYS_DUP: usize =        SYS_CLASS_FILE | SYS_RET_FILE | 41;
+pub const SYS_DUP2: usize =       SYS_CLASS_FILE | SYS_RET_FILE | 63;
+pub const SYS_READ: usize =       SYS_CLASS_FILE | SYS_ARG_MSLICE | 3;
+pub const SYS_WRITE: usize =      SYS_CLASS_FILE | SYS_ARG_SLICE | 4;
+pub const SYS_LSEEK: usize =      SYS_CLASS_FILE | 19;
+pub const SYS_FCHMOD: usize =     SYS_CLASS_FILE | 94;
+pub const SYS_FCHOWN: usize =     SYS_CLASS_FILE | 207;
+pub const SYS_FCNTL: usize =      SYS_CLASS_FILE | 55;
+pub const SYS_FEVENT: usize =     SYS_CLASS_FILE | 927;
+pub const SYS_FEXEC: usize =      SYS_CLASS_FILE | 11;
+pub const SYS_FMAP_OLD: usize =   SYS_CLASS_FILE | SYS_ARG_SLICE | 90;
+pub const SYS_FMAP: usize =       SYS_CLASS_FILE | SYS_ARG_SLICE | 900;
+pub const SYS_FUNMAP_OLD: usize = SYS_CLASS_FILE | 91;
+pub const SYS_FUNMAP: usize =     SYS_CLASS_FILE | 92;
+pub const SYS_FPATH: usize =      SYS_CLASS_FILE | SYS_ARG_MSLICE | 928;
+pub const SYS_FRENAME: usize =    SYS_CLASS_FILE | SYS_ARG_PATH | 38;
+pub const SYS_FSTAT: usize =      SYS_CLASS_FILE | SYS_ARG_MSLICE | 28;
+pub const SYS_FSTATVFS: usize =   SYS_CLASS_FILE | SYS_ARG_MSLICE | 100;
+pub const SYS_FSYNC: usize =      SYS_CLASS_FILE | 118;
+pub const SYS_FTRUNCATE: usize =  SYS_CLASS_FILE | 93;
+pub const SYS_FUTIMENS: usize =   SYS_CLASS_FILE | SYS_ARG_SLICE | 320;
+
+pub const SYS_CHDIR: usize =    12;
+pub const SYS_CLOCK_GETTIME: usize = 265;
+pub const SYS_CLONE: usize =    120;
+pub const SYS_EXIT: usize =     1;
+pub const SYS_FUTEX: usize =    240;
+pub const SYS_GETCWD: usize =   183;
+pub const SYS_GETEGID: usize =  202;
+pub const SYS_GETENS: usize =   951;
+pub const SYS_GETEUID: usize =  201;
+pub const SYS_GETGID: usize =   200;
+pub const SYS_GETNS: usize =    950;
+pub const SYS_GETPID: usize =   20;
+pub const SYS_GETPGID: usize =  132;
+pub const SYS_GETPPID: usize =  64;
+pub const SYS_GETUID: usize =   199;
+pub const SYS_IOPL: usize =     110;
+pub const SYS_KILL: usize =     37;
+pub const SYS_MPROTECT: usize = 125;
+pub const SYS_MKNS: usize =     984;
+pub const SYS_NANOSLEEP: usize =162;
+pub const SYS_PHYSALLOC: usize =945;
+pub const SYS_PHYSALLOC3: usize=9453;
+pub const SYS_PHYSFREE: usize = 946;
+pub const SYS_PHYSMAP: usize =  947;
+pub const SYS_PHYSUNMAP: usize =948;
+pub const SYS_VIRTTOPHYS: usize=949;
+pub const SYS_PIPE2: usize =    331;
+pub const SYS_SETPGID: usize =  57;
+pub const SYS_SETREGID: usize = 204;
+pub const SYS_SETRENS: usize =  952;
+pub const SYS_SETREUID: usize = 203;
+pub const SYS_SIGACTION: usize =67;
+pub const SYS_SIGPROCMASK:usize=126;
+pub const SYS_SIGRETURN: usize =119;
+pub const SYS_UMASK: usize =    60;
+pub const SYS_WAITPID: usize =  7;
+pub const SYS_YIELD: usize =    158;
diff --git a/third_party/rust/redox_syscall/src/scheme/generate.sh b/third_party/rust/redox_syscall/src/scheme/generate.sh
new file mode 100755
index 0000000000..a877cda921
--- /dev/null
+++ b/third_party/rust/redox_syscall/src/scheme/generate.sh
@@ -0,0 +1,23 @@
+#!/usr/bin/env bash
+
+set -e
+
+echo "Generating SchemeMut from Scheme"
+sed 's/trait Scheme/trait SchemeMut/' scheme.rs \
+| sed 's/\&self/\&mut self/g' \
+> scheme_mut.rs
+
+echo "Generating SchemeBlock from Scheme"
+sed 's/trait Scheme/trait SchemeBlock/' scheme.rs \
+| sed 's/fn handle(\&self, packet: \&mut Packet)/fn handle(\&self, packet: \&Packet) -> Option<usize>/' \
+| sed 's/packet.a = Error::mux(res);/res.transpose().map(Error::mux)/' \
+| sed 's/\.map(|f| f\.bits())/\.map(|f| f.map(|f| f.bits()))/' \
+| sed 's/\.map(|o| o as usize)/.map(|o| o.map(|o| o as usize))/' \
+| sed 's/Ok(0)/Ok(Some(0))/g' \
+| sed 's/Result<\([^>]\+\)>/Result<Option<\1>>/g' \
+> scheme_block.rs
+
+echo "Generating SchemeBlockMut from SchemeBlock"
+sed 's/trait SchemeBlock/trait SchemeBlockMut/' scheme_block.rs \
+| sed 's/\&self/\&mut self/g' \
+> scheme_block_mut.rs
diff --git a/third_party/rust/redox_syscall/src/scheme/mod.rs b/third_party/rust/redox_syscall/src/scheme/mod.rs
new file mode 100644
index 0000000000..f65d1e2c06
--- /dev/null
+++ b/third_party/rust/redox_syscall/src/scheme/mod.rs
@@ -0,0 +1,18 @@
+use core::{slice, str};
+
+pub use self::scheme::Scheme;
+pub use self::scheme_mut::SchemeMut;
+pub use self::scheme_block::SchemeBlock;
+pub use self::scheme_block_mut::SchemeBlockMut;
+pub use self::seek::*;
+
+unsafe fn str_from_raw_parts(ptr: *const u8, len: usize) -> Option<&'static str> {
+    let slice = slice::from_raw_parts(ptr, len);
+    str::from_utf8(slice).ok()
+}
+
+mod scheme;
+mod scheme_mut;
+mod scheme_block;
+mod scheme_block_mut;
+mod seek;
diff --git a/third_party/rust/redox_syscall/src/scheme/scheme.rs b/third_party/rust/redox_syscall/src/scheme/scheme.rs
new file mode 100644
index 0000000000..249d28c6e2
--- /dev/null
+++ b/third_party/rust/redox_syscall/src/scheme/scheme.rs
@@ -0,0 +1,211 @@
+use core::{mem, slice};
+
+use crate::data::*;
+use crate::error::*;
+use crate::flag::*;
+use crate::number::*;
+use crate::scheme::str_from_raw_parts;
+
+pub trait Scheme {
+    fn handle(&self, packet: &mut Packet) {
+        let res = match packet.a {
+            SYS_OPEN => if let Some(path) = unsafe { str_from_raw_parts(packet.b as *const u8, packet.c) } {
+                self.open(path, packet.d, packet.uid, packet.gid)
+            } else {
+                Err(Error::new(EINVAL))
+            },
+            SYS_CHMOD => if let Some(path) = unsafe { str_from_raw_parts(packet.b as *const u8, packet.c) } {
+                self.chmod(path, packet.d as u16, packet.uid, packet.gid)
+            } else {
+                Err(Error::new(EINVAL))
+            },
+            SYS_RMDIR => if let Some(path) = unsafe { str_from_raw_parts(packet.b as *const u8, packet.c) } {
+                self.rmdir(path, packet.uid, packet.gid)
+            } else {
+                Err(Error::new(EINVAL))
+            },
+            SYS_UNLINK => if let Some(path) = unsafe { str_from_raw_parts(packet.b as *const u8, packet.c) } {
+                self.unlink(path, packet.uid, packet.gid)
+            } else {
+                Err(Error::new(EINVAL))
+            },
+
+            SYS_DUP => self.dup(packet.b, unsafe { slice::from_raw_parts(packet.c as *const u8, packet.d) }),
+            SYS_READ => self.read(packet.b, unsafe { slice::from_raw_parts_mut(packet.c as *mut u8, packet.d) }),
+            SYS_WRITE => self.write(packet.b, unsafe { slice::from_raw_parts(packet.c as *const u8, packet.d) }),
+            SYS_LSEEK => self.seek(packet.b, packet.c as isize, packet.d).map(|o| o as usize),
+            SYS_FCHMOD => self.fchmod(packet.b, packet.c as u16),
+            SYS_FCHOWN => self.fchown(packet.b, packet.c as u32, packet.d as u32),
+            SYS_FCNTL => self.fcntl(packet.b, packet.c, packet.d),
+            SYS_FEVENT => self.fevent(packet.b, EventFlags::from_bits_truncate(packet.c)).map(|f| f.bits()),
+            SYS_FMAP_OLD => if packet.d >= mem::size_of::<OldMap>() {
+                self.fmap_old(packet.b, unsafe { &*(packet.c as *const OldMap) })
+            } else {
+                Err(Error::new(EFAULT))
+            },
+            SYS_FMAP => if packet.d >= mem::size_of::<Map>() {
+                self.fmap(packet.b, unsafe { &*(packet.c as *const Map) })
+            } else {
+                Err(Error::new(EFAULT))
+            },
+            SYS_FUNMAP_OLD => self.funmap_old(packet.b),
+            SYS_FUNMAP => self.funmap(packet.b, packet.c),
+            SYS_FPATH => self.fpath(packet.b, unsafe { slice::from_raw_parts_mut(packet.c as *mut u8, packet.d) }),
+            SYS_FRENAME => if let Some(path) = unsafe { str_from_raw_parts(packet.c as *const u8, packet.d) } {
+                self.frename(packet.b, path, packet.uid, packet.gid)
+            } else {
+                Err(Error::new(EINVAL))
+            },
+            SYS_FSTAT => if packet.d >= mem::size_of::<Stat>() {
+                self.fstat(packet.b, unsafe { &mut *(packet.c as *mut Stat) })
+            } else {
+                Err(Error::new(EFAULT))
+            },
+            SYS_FSTATVFS => if packet.d >= mem::size_of::<StatVfs>() {
+                self.fstatvfs(packet.b, unsafe { &mut *(packet.c as *mut StatVfs) })
+            } else {
+                Err(Error::new(EFAULT))
+            },
+            SYS_FSYNC => self.fsync(packet.b),
+            SYS_FTRUNCATE => self.ftruncate(packet.b, packet.c),
+            SYS_FUTIMENS => if packet.d >= mem::size_of::<TimeSpec>() {
+                self.futimens(packet.b, unsafe { slice::from_raw_parts(packet.c as *const TimeSpec, packet.d / mem::size_of::<TimeSpec>()) })
+            } else {
+                Err(Error::new(EFAULT))
+            },
+            SYS_CLOSE => self.close(packet.b),
+            _ => Err(Error::new(ENOSYS))
+        };
+
+        packet.a = Error::mux(res);
+    }
+
+    /* Scheme operations */
+
+    #[allow(unused_variables)]
+    fn open(&self, path: &str, flags: usize, uid: u32, gid: u32) -> Result<usize> {
+        Err(Error::new(ENOENT))
+    }
+
+    #[allow(unused_variables)]
+    fn chmod(&self, path: &str, mode: u16, uid: u32, gid: u32) -> Result<usize> {
+        Err(Error::new(ENOENT))
+    }
+
+    #[allow(unused_variables)]
+    fn rmdir(&self, path: &str, uid: u32, gid: u32) -> Result<usize> {
+        Err(Error::new(ENOENT))
+    }
+
+    #[allow(unused_variables)]
+    fn unlink(&self, path: &str, uid: u32, gid: u32) -> Result<usize> {
+        Err(Error::new(ENOENT))
+    }
+
+    /* Resource operations */
+    #[allow(unused_variables)]
+    fn dup(&self, old_id: usize, buf: &[u8]) -> Result<usize> {
+        Err(Error::new(EBADF))
+    }
+
+    #[allow(unused_variables)]
+    fn read(&self, id: usize, buf: &mut [u8]) -> Result<usize> {
+        Err(Error::new(EBADF))
+    }
+
+    #[allow(unused_variables)]
+    fn write(&self, id: usize, buf: &[u8]) -> Result<usize> {
+        Err(Error::new(EBADF))
+    }
+
+    #[allow(unused_variables)]
+    fn seek(&self, id: usize, pos: isize, whence: usize) -> Result<isize> {
+        Err(Error::new(EBADF))
+    }
+
+    #[allow(unused_variables)]
+    fn fchmod(&self, id: usize, mode: u16) -> Result<usize> {
+        Err(Error::new(EBADF))
+    }
+
+    #[allow(unused_variables)]
+    fn fchown(&self, id: usize, uid: u32, gid: u32) -> Result<usize> {
+        Err(Error::new(EBADF))
+    }
+
+    #[allow(unused_variables)]
+    fn fcntl(&self, id: usize, cmd: usize, arg: usize) -> Result<usize> {
+        Err(Error::new(EBADF))
+    }
+
+    #[allow(unused_variables)]
+    fn fevent(&self, id: usize, flags: EventFlags) -> Result<EventFlags> {
+        Err(Error::new(EBADF))
+    }
+
+    #[allow(unused_variables)]
+    fn fmap_old(&self, id: usize, map: &OldMap) -> Result<usize> {
+        Err(Error::new(EBADF))
+    }
+    #[allow(unused_variables)]
+    fn fmap(&self, id: usize, map: &Map) -> Result<usize> {
+        if map.flags.contains(MapFlags::MAP_FIXED) {
+            return Err(Error::new(EINVAL));
+        }
+        self.fmap_old(id, &OldMap {
+            offset: map.offset,
+            size: map.size,
+            flags: map.flags,
+        })
+    }
+
+    #[allow(unused_variables)]
+    fn funmap_old(&self, address: usize) -> Result<usize> {
+        Ok(0)
+    }
+
+    #[allow(unused_variables)]
+    fn funmap(&self, address: usize, length: usize) -> Result<usize> {
+        Ok(0)
+    }
+
+    #[allow(unused_variables)]
+    fn fpath(&self, id: usize, buf: &mut [u8]) -> Result<usize> {
+        Err(Error::new(EBADF))
+    }
+
+    #[allow(unused_variables)]
+    fn frename(&self, id: usize, path: &str, uid: u32, gid: u32) -> Result<usize> {
+        Err(Error::new(EBADF))
+    }
+
+    #[allow(unused_variables)]
+    fn fstat(&self, id: usize, stat: &mut Stat) -> Result<usize> {
+        Err(Error::new(EBADF))
+    }
+
+    #[allow(unused_variables)]
+    fn fstatvfs(&self, id: usize, stat: &mut StatVfs) -> Result<usize> {
+        Err(Error::new(EBADF))
+    }
+
+    #[allow(unused_variables)]
+    fn fsync(&self, id: usize) -> Result<usize> {
+        Err(Error::new(EBADF))
+    }
+
+    #[allow(unused_variables)]
+    fn ftruncate(&self, id: usize, len: usize) -> Result<usize> {
+        Err(Error::new(EBADF))
+    }
+
+    #[allow(unused_variables)]
+    fn futimens(&self, id: usize, times: &[TimeSpec]) -> Result<usize> {
+        Err(Error::new(EBADF))
+    }
+
+    #[allow(unused_variables)]
+    fn close(&self, id: usize) -> Result<usize> {
+        Err(Error::new(EBADF))
+    }
+}
diff --git a/third_party/rust/redox_syscall/src/scheme/scheme_block.rs b/third_party/rust/redox_syscall/src/scheme/scheme_block.rs
new file mode 100644
index 0000000000..e22535e0fd
--- /dev/null
+++ b/third_party/rust/redox_syscall/src/scheme/scheme_block.rs
@@ -0,0 +1,211 @@
+use core::{mem, slice};
+
+use crate::data::*;
+use crate::error::*;
+use crate::flag::*;
+use crate::number::*;
+use crate::scheme::str_from_raw_parts;
+
+pub trait SchemeBlock {
+    fn handle(&self, packet: &Packet) -> Option<usize> {
+        let res = match packet.a {
+            SYS_OPEN => if let Some(path) = unsafe { str_from_raw_parts(packet.b as *const u8, packet.c) } {
+                self.open(path, packet.d, packet.uid, packet.gid)
+            } else {
+                Err(Error::new(EINVAL))
+            },
+            SYS_CHMOD => if let Some(path) = unsafe { str_from_raw_parts(packet.b as *const u8, packet.c) } {
+                self.chmod(path, packet.d as u16, packet.uid, packet.gid)
+            } else {
+                Err(Error::new(EINVAL))
+            },
+            SYS_RMDIR => if let Some(path) = unsafe { str_from_raw_parts(packet.b as *const u8, packet.c) } {
+                self.rmdir(path, packet.uid, packet.gid)
+            } else {
+                Err(Error::new(EINVAL))
+            },
+            SYS_UNLINK => if let Some(path) = unsafe { str_from_raw_parts(packet.b as *const u8, packet.c) } {
+                self.unlink(path, packet.uid, packet.gid)
+            } else {
+                Err(Error::new(EINVAL))
+            },
+
+            SYS_DUP => self.dup(packet.b, unsafe { slice::from_raw_parts(packet.c as *const u8, packet.d) }),
+            SYS_READ => self.read(packet.b, unsafe { slice::from_raw_parts_mut(packet.c as *mut u8, packet.d) }),
+            SYS_WRITE => self.write(packet.b, unsafe { slice::from_raw_parts(packet.c as *const u8, packet.d) }),
+            SYS_LSEEK => self.seek(packet.b, packet.c as isize, packet.d).map(|o| o.map(|o| o as usize)),
+            SYS_FCHMOD => self.fchmod(packet.b, packet.c as u16),
+            SYS_FCHOWN => self.fchown(packet.b, packet.c as u32, packet.d as u32),
+            SYS_FCNTL => self.fcntl(packet.b, packet.c, packet.d),
+            SYS_FEVENT => self.fevent(packet.b, EventFlags::from_bits_truncate(packet.c)).map(|f| f.map(|f| f.bits())),
+            SYS_FMAP_OLD => if packet.d >= mem::size_of::<OldMap>() {
+                self.fmap_old(packet.b, unsafe { &*(packet.c as *const OldMap) })
+            } else {
+                Err(Error::new(EFAULT))
+            },
+            SYS_FMAP => if packet.d >= mem::size_of::<Map>() {
+                self.fmap(packet.b, unsafe { &*(packet.c as *const Map) })
+            } else {
+                Err(Error::new(EFAULT))
+            },
+            SYS_FUNMAP_OLD => self.funmap_old(packet.b),
+            SYS_FUNMAP => self.funmap(packet.b, packet.c),
+            SYS_FPATH => self.fpath(packet.b, unsafe { slice::from_raw_parts_mut(packet.c as *mut u8, packet.d) }),
+            SYS_FRENAME => if let Some(path) = unsafe { str_from_raw_parts(packet.c as *const u8, packet.d) } {
+                self.frename(packet.b, path, packet.uid, packet.gid)
+            } else {
+                Err(Error::new(EINVAL))
+            },
+            SYS_FSTAT => if packet.d >= mem::size_of::<Stat>() {
+                self.fstat(packet.b, unsafe { &mut *(packet.c as *mut Stat) })
+            } else {
+                Err(Error::new(EFAULT))
+            },
+            SYS_FSTATVFS => if packet.d >= mem::size_of::<StatVfs>() {
+                self.fstatvfs(packet.b, unsafe { &mut *(packet.c as *mut StatVfs) })
+            } else {
+                Err(Error::new(EFAULT))
+            },
+            SYS_FSYNC => self.fsync(packet.b),
+            SYS_FTRUNCATE => self.ftruncate(packet.b, packet.c),
+            SYS_FUTIMENS => if packet.d >= mem::size_of::<TimeSpec>() {
+                self.futimens(packet.b, unsafe { slice::from_raw_parts(packet.c as *const TimeSpec, packet.d / mem::size_of::<TimeSpec>()) })
+            } else {
+                Err(Error::new(EFAULT))
+            },
+            SYS_CLOSE => self.close(packet.b),
+            _ => Err(Error::new(ENOSYS))
+        };
+
+        res.transpose().map(Error::mux)
+    }
+
+    /* Scheme operations */
+
+    #[allow(unused_variables)]
+    fn open(&self, path: &str, flags: usize, uid: u32, gid: u32) -> Result<Option<usize>> {
+        Err(Error::new(ENOENT))
+    }
+
+    #[allow(unused_variables)]
+    fn chmod(&self, path: &str, mode: u16, uid: u32, gid: u32) -> Result<Option<usize>> {
+        Err(Error::new(ENOENT))
+    }
+
+    #[allow(unused_variables)]
+    fn rmdir(&self, path: &str, uid: u32, gid: u32) -> Result<Option<usize>> {
+        Err(Error::new(ENOENT))
+    }
+
+    #[allow(unused_variables)]
+    fn unlink(&self, path: &str, uid: u32, gid: u32) -> Result<Option<usize>> {
+        Err(Error::new(ENOENT))
+    }
+
+    /* Resource operations */
+    #[allow(unused_variables)]
+    fn dup(&self, old_id: usize, buf: &[u8]) -> Result<Option<usize>> {
+        Err(Error::new(EBADF))
+    }
+
+    #[allow(unused_variables)]
+    fn read(&self, id: usize, buf: &mut [u8]) -> Result<Option<usize>> {
+        Err(Error::new(EBADF))
+    }
+
+    #[allow(unused_variables)]
+    fn write(&self, id: usize, buf: &[u8]) -> Result<Option<usize>> {
+        Err(Error::new(EBADF))
+    }
+
+    #[allow(unused_variables)]
+    fn seek(&self, id: usize, pos: isize, whence: usize) -> Result<Option<isize>> {
+        Err(Error::new(EBADF))
+    }
+
+    #[allow(unused_variables)]
+    fn fchmod(&self, id: usize, mode: u16) -> Result<Option<usize>> {
+        Err(Error::new(EBADF))
+    }
+
+    #[allow(unused_variables)]
+    fn fchown(&self, id: usize, uid: u32, gid: u32) -> Result<Option<usize>> {
+        Err(Error::new(EBADF))
+    }
+
+    #[allow(unused_variables)]
+    fn fcntl(&self, id: usize, cmd: usize, arg: usize) -> Result<Option<usize>> {
+        Err(Error::new(EBADF))
+    }
+
+    #[allow(unused_variables)]
+    fn fevent(&self, id: usize, flags: EventFlags) -> Result<Option<EventFlags>> {
+        Err(Error::new(EBADF))
+    }
+
+    #[allow(unused_variables)]
+    fn fmap_old(&self, id: usize, map: &OldMap) -> Result<Option<usize>> {
+        Err(Error::new(EBADF))
+    }
+    #[allow(unused_variables)]
+    fn fmap(&self, id: usize, map: &Map) -> Result<Option<usize>> {
+        if map.flags.contains(MapFlags::MAP_FIXED) {
+            return Err(Error::new(EINVAL));
+        }
+        self.fmap_old(id, &OldMap {
+            offset: map.offset,
+            size: map.size,
+            flags: map.flags,
+        })
+    }
+
+    #[allow(unused_variables)]
+    fn funmap_old(&self, address: usize) -> Result<Option<usize>> {
+        Ok(Some(0))
+    }
+
+    #[allow(unused_variables)]
+    fn funmap(&self, address: usize, length: usize) -> Result<Option<usize>> {
+        Ok(Some(0))
+    }
+
+    #[allow(unused_variables)]
+    fn fpath(&self, id: usize, buf: &mut [u8]) -> Result<Option<usize>> {
+        Err(Error::new(EBADF))
+    }
+
+    #[allow(unused_variables)]
+    fn frename(&self, id: usize, path: &str, uid: u32, gid: u32) -> Result<Option<usize>> {
+        Err(Error::new(EBADF))
+    }
+
+    #[allow(unused_variables)]
+    fn fstat(&self, id: usize, stat: &mut Stat) -> Result<Option<usize>> {
+        Err(Error::new(EBADF))
+    }
+
+    #[allow(unused_variables)]
+    fn fstatvfs(&self, id: usize, stat: &mut StatVfs) -> Result<Option<usize>> {
+        Err(Error::new(EBADF))
+    }
+
+    #[allow(unused_variables)]
+    fn fsync(&self, id: usize) -> Result<Option<usize>> {
+        Err(Error::new(EBADF))
+    }
+
+    #[allow(unused_variables)]
+    fn ftruncate(&self, id: usize, len: usize) -> Result<Option<usize>> {
+        Err(Error::new(EBADF))
+    }
+
+    #[allow(unused_variables)]
+    fn futimens(&self, id: usize, times: &[TimeSpec]) -> Result<Option<usize>> {
+        Err(Error::new(EBADF))
+    }
+
+    #[allow(unused_variables)]
+    fn close(&self, id: usize) -> Result<Option<usize>> {
+        Err(Error::new(EBADF))
+    }
+}
diff --git a/third_party/rust/redox_syscall/src/scheme/scheme_block_mut.rs b/third_party/rust/redox_syscall/src/scheme/scheme_block_mut.rs
new file mode 100644
index 0000000000..c1e54351a3
--- /dev/null
+++ b/third_party/rust/redox_syscall/src/scheme/scheme_block_mut.rs
@@ -0,0 +1,211 @@
+use core::{mem, slice};
+
+use crate::data::*;
+use crate::error::*;
+use crate::flag::*;
+use crate::number::*;
+use crate::scheme::str_from_raw_parts;
+
+pub trait SchemeBlockMut {
+    fn handle(&mut self, packet: &Packet) -> Option<usize> {
+        let res = match packet.a {
+            SYS_OPEN => if let Some(path) = unsafe { str_from_raw_parts(packet.b as *const u8, packet.c) } {
+                self.open(path, packet.d, packet.uid, packet.gid)
+            } else {
+                Err(Error::new(EINVAL))
+            },
+            SYS_CHMOD => if let Some(path) = unsafe { str_from_raw_parts(packet.b as *const u8, packet.c) } {
+                self.chmod(path, packet.d as u16, packet.uid, packet.gid)
+            } else {
+                Err(Error::new(EINVAL))
+            },
+            SYS_RMDIR => if let Some(path) = unsafe { str_from_raw_parts(packet.b as *const u8, packet.c) } {
+                self.rmdir(path, packet.uid, packet.gid)
+            } else {
+                Err(Error::new(EINVAL))
+            },
+            SYS_UNLINK => if let Some(path) = unsafe { str_from_raw_parts(packet.b as *const u8, packet.c) } {
+                self.unlink(path, packet.uid, packet.gid)
+            } else {
+                Err(Error::new(EINVAL))
+            },
+
+            SYS_DUP => self.dup(packet.b, unsafe { slice::from_raw_parts(packet.c as *const u8, packet.d) }),
+            SYS_READ => self.read(packet.b, unsafe { slice::from_raw_parts_mut(packet.c as *mut u8, packet.d) }),
+            SYS_WRITE => self.write(packet.b, unsafe { slice::from_raw_parts(packet.c as *const u8, packet.d) }),
+            SYS_LSEEK => self.seek(packet.b, packet.c as isize, packet.d).map(|o| o.map(|o| o as usize)),
+            SYS_FCHMOD => self.fchmod(packet.b, packet.c as u16),
+            SYS_FCHOWN => self.fchown(packet.b, packet.c as u32, packet.d as u32),
+            SYS_FCNTL => self.fcntl(packet.b, packet.c, packet.d),
+            SYS_FEVENT => self.fevent(packet.b, EventFlags::from_bits_truncate(packet.c)).map(|f| f.map(|f| f.bits())),
+            SYS_FMAP_OLD => if packet.d >= mem::size_of::<OldMap>() {
+                self.fmap_old(packet.b, unsafe { &*(packet.c as *const OldMap) })
+            } else {
+                Err(Error::new(EFAULT))
+            },
+            SYS_FMAP => if packet.d >= mem::size_of::<Map>() {
+                self.fmap(packet.b, unsafe { &*(packet.c as *const Map) })
+            } else {
+                Err(Error::new(EFAULT))
+            },
+            SYS_FUNMAP_OLD => self.funmap_old(packet.b),
+            SYS_FUNMAP => self.funmap(packet.b, packet.c),
+            SYS_FPATH => self.fpath(packet.b, unsafe { slice::from_raw_parts_mut(packet.c as *mut u8, packet.d) }),
+            SYS_FRENAME => if let Some(path) = unsafe { str_from_raw_parts(packet.c as *const u8, packet.d) } {
+                self.frename(packet.b, path, packet.uid, packet.gid)
+            } else {
+                Err(Error::new(EINVAL))
+            },
+            SYS_FSTAT => if packet.d >= mem::size_of::<Stat>() {
+                self.fstat(packet.b, unsafe { &mut *(packet.c as *mut Stat) })
+            } else {
+                Err(Error::new(EFAULT))
+            },
+            SYS_FSTATVFS => if packet.d >= mem::size_of::<StatVfs>() {
+                self.fstatvfs(packet.b, unsafe { &mut *(packet.c as *mut StatVfs) })
+            } else {
+                Err(Error::new(EFAULT))
+            },
+            SYS_FSYNC => self.fsync(packet.b),
+            SYS_FTRUNCATE => self.ftruncate(packet.b, packet.c),
+            SYS_FUTIMENS => if packet.d >= mem::size_of::<TimeSpec>() {
+                self.futimens(packet.b, unsafe { slice::from_raw_parts(packet.c as *const TimeSpec, packet.d / mem::size_of::<TimeSpec>()) })
+            } else {
+                Err(Error::new(EFAULT))
+            },
+            SYS_CLOSE => self.close(packet.b),
+            _ => Err(Error::new(ENOSYS))
+        };
+
+        res.transpose().map(Error::mux)
+    }
+
+    /* Scheme operations */
+
+    #[allow(unused_variables)]
+    fn open(&mut self, path: &str, flags: usize, uid: u32, gid: u32) -> Result<Option<usize>> {
+        Err(Error::new(ENOENT))
+    }
+
+    #[allow(unused_variables)]
+    fn chmod(&mut self, path: &str, mode: u16, uid: u32, gid: u32) -> Result<Option<usize>> {
+        Err(Error::new(ENOENT))
+    }
+
+    #[allow(unused_variables)]
+    fn rmdir(&mut self, path: &str, uid: u32, gid: u32) -> Result<Option<usize>> {
+        Err(Error::new(ENOENT))
+    }
+
+    #[allow(unused_variables)]
+    fn unlink(&mut self, path: &str, uid: u32, gid: u32) -> Result<Option<usize>> {
+        Err(Error::new(ENOENT))
+    }
+
+    /* Resource operations */
+    #[allow(unused_variables)]
+    fn dup(&mut self, old_id: usize, buf: &[u8]) -> Result<Option<usize>> {
+        Err(Error::new(EBADF))
+    }
+
+    #[allow(unused_variables)]
+    fn read(&mut self, id: usize, buf: &mut [u8]) -> Result<Option<usize>> {
+        Err(Error::new(EBADF))
+    }
+
+    #[allow(unused_variables)]
+    fn write(&mut self, id: usize, buf: &[u8]) -> Result<Option<usize>> {
+        Err(Error::new(EBADF))
+    }
+
+    #[allow(unused_variables)]
+    fn seek(&mut self, id: usize, pos: isize, whence: usize) -> Result<Option<isize>> {
+        Err(Error::new(EBADF))
+    }
+
+    #[allow(unused_variables)]
+    fn fchmod(&mut self, id: usize, mode: u16) -> Result<Option<usize>> {
+        Err(Error::new(EBADF))
+    }
+
+    #[allow(unused_variables)]
+    fn fchown(&mut self, id: usize, uid: u32, gid: u32) -> Result<Option<usize>> {
+        Err(Error::new(EBADF))
+    }
+
+    #[allow(unused_variables)]
+    fn fcntl(&mut self, id: usize, cmd: usize, arg: usize) -> Result<Option<usize>> {
+        Err(Error::new(EBADF))
+    }
+
+    #[allow(unused_variables)]
+    fn fevent(&mut self, id: usize, flags: EventFlags) -> Result<Option<EventFlags>> {
+        Err(Error::new(EBADF))
+    }
+
+    #[allow(unused_variables)]
+    fn fmap_old(&mut self, id: usize, map: &OldMap) -> Result<Option<usize>> {
+        Err(Error::new(EBADF))
+    }
+    #[allow(unused_variables)]
+    fn fmap(&mut self, id: usize, map: &Map) -> Result<Option<usize>> {
+        if map.flags.contains(MapFlags::MAP_FIXED) {
+            return Err(Error::new(EINVAL));
+        }
+        self.fmap_old(id, &OldMap {
+            offset: map.offset,
+            size: map.size,
+            flags: map.flags,
+        })
+    }
+
+    #[allow(unused_variables)]
+    fn funmap_old(&mut self, address: usize) -> Result<Option<usize>> {
+        Ok(Some(0))
+    }
+
+    #[allow(unused_variables)]
+    fn funmap(&mut self, address: usize, length: usize) -> Result<Option<usize>> {
+        Ok(Some(0))
+    }
+
+    #[allow(unused_variables)]
+    fn fpath(&mut self, id: usize, buf: &mut [u8]) -> Result<Option<usize>> {
+        Err(Error::new(EBADF))
+    }
+
+    #[allow(unused_variables)]
+    fn frename(&mut self, id: usize, path: &str, uid: u32, gid: u32) -> Result<Option<usize>> {
+        Err(Error::new(EBADF))
+    }
+
+    #[allow(unused_variables)]
+    fn fstat(&mut self, id: usize, stat: &mut Stat) -> Result<Option<usize>> {
+        Err(Error::new(EBADF))
+    }
+
+    #[allow(unused_variables)]
+    fn fstatvfs(&mut self, id: usize, stat: &mut StatVfs) -> Result<Option<usize>> {
+        Err(Error::new(EBADF))
+    }
+
+    #[allow(unused_variables)]
+    fn fsync(&mut self, id: usize) -> Result<Option<usize>> {
+        Err(Error::new(EBADF))
+    }
+
+    #[allow(unused_variables)]
+    fn ftruncate(&mut self, id: usize, len: usize) -> Result<Option<usize>> {
+        Err(Error::new(EBADF))
+    }
+
+    #[allow(unused_variables)]
+    fn futimens(&mut self, id: usize, times: &[TimeSpec]) -> Result<Option<usize>> {
+        Err(Error::new(EBADF))
+    }
+
+    #[allow(unused_variables)]
+    fn close(&mut self, id: usize) -> Result<Option<usize>> {
+        Err(Error::new(EBADF))
+    }
+}
diff --git a/third_party/rust/redox_syscall/src/scheme/scheme_mut.rs b/third_party/rust/redox_syscall/src/scheme/scheme_mut.rs
new file mode 100644
index 0000000000..deb1483664
--- /dev/null
+++ b/third_party/rust/redox_syscall/src/scheme/scheme_mut.rs
@@ -0,0 +1,211 @@
+use core::{mem, slice};
+
+use crate::data::*;
+use crate::error::*;
+use crate::flag::*;
+use crate::number::*;
+use crate::scheme::str_from_raw_parts;
+
+pub trait SchemeMut {
+    fn handle(&mut self, packet: &mut Packet) {
+        let res = match packet.a {
+            SYS_OPEN => if let Some(path) = unsafe { str_from_raw_parts(packet.b as *const u8, packet.c) } {
+                self.open(path, packet.d, packet.uid, packet.gid)
+            } else {
+                Err(Error::new(EINVAL))
+            },
+            SYS_CHMOD => if let Some(path) = unsafe { str_from_raw_parts(packet.b as *const u8, packet.c) } {
+                self.chmod(path, packet.d as u16, packet.uid, packet.gid)
+            } else {
+                Err(Error::new(EINVAL))
+            },
+            SYS_RMDIR => if let Some(path) = unsafe { str_from_raw_parts(packet.b as *const u8, packet.c) } {
+                self.rmdir(path, packet.uid, packet.gid)
+            } else {
+                Err(Error::new(EINVAL))
+            },
+            SYS_UNLINK => if let Some(path) = unsafe { str_from_raw_parts(packet.b as *const u8, packet.c) } {
+                self.unlink(path, packet.uid, packet.gid)
+            } else {
+                Err(Error::new(EINVAL))
+            },
+
+            SYS_DUP => self.dup(packet.b, unsafe { slice::from_raw_parts(packet.c as *const u8, packet.d) }),
+            SYS_READ => self.read(packet.b, unsafe { slice::from_raw_parts_mut(packet.c as *mut u8, packet.d) }),
+            SYS_WRITE => self.write(packet.b, unsafe { slice::from_raw_parts(packet.c as *const u8, packet.d) }),
+            SYS_LSEEK => self.seek(packet.b, packet.c as isize, packet.d).map(|o| o as usize),
+            SYS_FCHMOD => self.fchmod(packet.b, packet.c as u16),
+            SYS_FCHOWN => self.fchown(packet.b, packet.c as u32, packet.d as u32),
+            SYS_FCNTL => self.fcntl(packet.b, packet.c, packet.d),
+            SYS_FEVENT => self.fevent(packet.b, EventFlags::from_bits_truncate(packet.c)).map(|f| f.bits()),
+            SYS_FMAP_OLD => if packet.d >= mem::size_of::<OldMap>() {
+                self.fmap_old(packet.b, unsafe { &*(packet.c as *const OldMap) })
+            } else {
+                Err(Error::new(EFAULT))
+            },
+            SYS_FMAP => if packet.d >= mem::size_of::<Map>() {
+                self.fmap(packet.b, unsafe { &*(packet.c as *const Map) })
+            } else {
+                Err(Error::new(EFAULT))
+            },
+            SYS_FUNMAP_OLD => self.funmap_old(packet.b),
+            SYS_FUNMAP => self.funmap(packet.b, packet.c),
+            SYS_FPATH => self.fpath(packet.b, unsafe { slice::from_raw_parts_mut(packet.c as *mut u8, packet.d) }),
+            SYS_FRENAME => if let Some(path) = unsafe { str_from_raw_parts(packet.c as *const u8, packet.d) } {
+                self.frename(packet.b, path, packet.uid, packet.gid)
+            } else {
+                Err(Error::new(EINVAL))
+            },
+            SYS_FSTAT => if packet.d >= mem::size_of::<Stat>() {
+                self.fstat(packet.b, unsafe { &mut *(packet.c as *mut Stat) })
+            } else {
+                Err(Error::new(EFAULT))
+            },
+            SYS_FSTATVFS => if packet.d >= mem::size_of::<StatVfs>() {
+                self.fstatvfs(packet.b, unsafe { &mut *(packet.c as *mut StatVfs) })
+            } else {
+                Err(Error::new(EFAULT))
+            },
+            SYS_FSYNC => self.fsync(packet.b),
+            SYS_FTRUNCATE => self.ftruncate(packet.b, packet.c),
+            SYS_FUTIMENS => if packet.d >= mem::size_of::<TimeSpec>() {
+                self.futimens(packet.b, unsafe { slice::from_raw_parts(packet.c as *const TimeSpec, packet.d / mem::size_of::<TimeSpec>()) })
+            } else {
+                Err(Error::new(EFAULT))
+            },
+            SYS_CLOSE => self.close(packet.b),
+            _ => Err(Error::new(ENOSYS))
+        };
+
+        packet.a = Error::mux(res);
+    }
+
+    /* Scheme operations */
+
+    #[allow(unused_variables)]
+    fn open(&mut self, path: &str, flags: usize, uid: u32, gid: u32) -> Result<usize> {
+        Err(Error::new(ENOENT))
+    }
+
+    #[allow(unused_variables)]
+    fn chmod(&mut self, path: &str, mode: u16, uid: u32, gid: u32) -> Result<usize> {
+        Err(Error::new(ENOENT))
+    }
+
+    #[allow(unused_variables)]
+    fn rmdir(&mut self, path: &str, uid: u32, gid: u32) -> Result<usize> {
+        Err(Error::new(ENOENT))
+    }
+
+    #[allow(unused_variables)]
+    fn unlink(&mut self, path: &str, uid: u32, gid: u32) -> Result<usize> {
+        Err(Error::new(ENOENT))
+    }
+
+    /* Resource operations */
+    #[allow(unused_variables)]
+    fn dup(&mut self, old_id: usize, buf: &[u8]) -> Result<usize> {
+        Err(Error::new(EBADF))
+    }
+
+    #[allow(unused_variables)]
+    fn read(&mut self, id: usize, buf: &mut [u8]) -> Result<usize> {
+        Err(Error::new(EBADF))
+    }
+
+    #[allow(unused_variables)]
+    fn write(&mut self, id: usize, buf: &[u8]) -> Result<usize> {
+        Err(Error::new(EBADF))
+    }
+
+    #[allow(unused_variables)]
+    fn seek(&mut self, id: usize, pos: isize, whence: usize) -> Result<isize> {
+        Err(Error::new(EBADF))
+    }
+
+    #[allow(unused_variables)]
+    fn fchmod(&mut self, id: usize, mode: u16) -> Result<usize> {
+        Err(Error::new(EBADF))
+    }
+
+    #[allow(unused_variables)]
+    fn fchown(&mut self, id: usize, uid: u32, gid: u32) -> Result<usize> {
+        Err(Error::new(EBADF))
+    }
+
+    #[allow(unused_variables)]
+    fn fcntl(&mut self, id: usize, cmd: usize, arg: usize) -> Result<usize> {
+        Err(Error::new(EBADF))
+    }
+
+    #[allow(unused_variables)]
+    fn fevent(&mut self, id: usize, flags: EventFlags) -> Result<EventFlags> {
+        Err(Error::new(EBADF))
+    }
+
+    #[allow(unused_variables)]
+    fn fmap_old(&mut self, id: usize, map: &OldMap) -> Result<usize> {
+        Err(Error::new(EBADF))
+    }
+    #[allow(unused_variables)]
+    fn fmap(&mut self, id: usize, map: &Map) -> Result<usize> {
+        if map.flags.contains(MapFlags::MAP_FIXED) {
+            return Err(Error::new(EINVAL));
+        }
+        self.fmap_old(id, &OldMap {
+            offset: map.offset,
+            size: map.size,
+            flags: map.flags,
+        })
+    }
+
+    #[allow(unused_variables)]
+    fn funmap_old(&mut self, address: usize) -> Result<usize> {
+        Ok(0)
+    }
+
+    #[allow(unused_variables)]
+    fn funmap(&mut self, address: usize, length: usize) -> Result<usize> {
+        Ok(0)
+    }
+
+    #[allow(unused_variables)]
+    fn fpath(&mut self, id: usize, buf: &mut [u8]) -> Result<usize> {
+        Err(Error::new(EBADF))
+    }
+
+    #[allow(unused_variables)]
+    fn frename(&mut self, id: usize, path: &str, uid: u32, gid: u32) -> Result<usize> {
+        Err(Error::new(EBADF))
+    }
+
+    #[allow(unused_variables)]
+    fn fstat(&mut self, id: usize, stat: &mut Stat) -> Result<usize> {
+        Err(Error::new(EBADF))
+    }
+
+    #[allow(unused_variables)]
+    fn fstatvfs(&mut self, id: usize, stat: &mut StatVfs) -> Result<usize> {
+        Err(Error::new(EBADF))
+    }
+
+    #[allow(unused_variables)]
+    fn fsync(&mut self, id: usize) -> Result<usize> {
+        Err(Error::new(EBADF))
+    }
+
+    #[allow(unused_variables)]
+    fn ftruncate(&mut self, id: usize, len: usize) -> Result<usize> {
+        Err(Error::new(EBADF))
+    }
+
+    #[allow(unused_variables)]
+    fn futimens(&mut self, id: usize, times: &[TimeSpec]) -> Result<usize> {
+        Err(Error::new(EBADF))
+    }
+
+    #[allow(unused_variables)]
+    fn close(&mut self, id: usize) -> Result<usize> {
+        Err(Error::new(EBADF))
+    }
+}
diff --git a/third_party/rust/redox_syscall/src/scheme/seek.rs b/third_party/rust/redox_syscall/src/scheme/seek.rs
new file mode 100644
index 0000000000..09a45186ac
--- /dev/null
+++ b/third_party/rust/redox_syscall/src/scheme/seek.rs
@@ -0,0 +1,33 @@
+use core::cmp;
+use core::convert::TryFrom;
+use crate::error::*;
+use crate::flag::*;
+
+/// Helper for seek calls
+/// In most cases it's easier to use a usize to track the offset and buffer size internally,
+/// but the seek interface uses isize.  This wrapper ensures EOVERFLOW errors are returned
+/// as appropriate if the value in the usize can't fit in the isize.
+pub fn calc_seek_offset_usize(cur_offset: usize, pos: isize, whence: usize, buf_len: usize) -> Result<isize> {
+    let cur_offset = isize::try_from(cur_offset).or_else(|_| Err(Error::new(EOVERFLOW)))?;
+    let buf_len = isize::try_from(buf_len).or_else(|_| Err(Error::new(EOVERFLOW)))?;
+    calc_seek_offset_isize(cur_offset, pos, whence, buf_len)
+}
+
+/// Helper for seek calls
+/// Result is guaranteed to be positive.
+/// EOVERFLOW returned if the arguments would cause an overflow.
+/// EINVAL returned if the new offset is out of bounds.
+pub fn calc_seek_offset_isize(cur_offset: isize, pos: isize, whence: usize, buf_len: isize) -> Result<isize> {
+    let new_offset = match whence {
+        SEEK_CUR => pos.checked_add(cur_offset),
+        SEEK_END => pos.checked_add(buf_len),
+        SEEK_SET => Some(pos),
+        _ => None,
+    };
+
+    match new_offset {
+        Some(new_offset) if new_offset < 0 => Err(Error::new(EINVAL)),
+        Some(new_offset) => Ok(cmp::min(new_offset, buf_len)),
+        None => Err(Error::new(EOVERFLOW))
+    }
+}
\ No newline at end of file
diff --git a/third_party/rust/redox_syscall/src/tests.rs b/third_party/rust/redox_syscall/src/tests.rs
new file mode 100644
index 0000000000..c5e1f8df07
--- /dev/null
+++ b/third_party/rust/redox_syscall/src/tests.rs
@@ -0,0 +1,470 @@
+#[test]
+fn chdir() {
+    use std::str;
+
+    let mut current_buf = [0; 4096];
+    let current_count = dbg!(crate::getcwd(&mut current_buf)).unwrap();
+    let current = dbg!(str::from_utf8(&current_buf[..current_count])).unwrap();
+
+    let new = "file:";
+    assert_eq!(dbg!(crate::chdir(dbg!(new))), Ok(0));
+    {
+        let mut buf = [0; 4096];
+        let count = dbg!(crate::getcwd(&mut buf)).unwrap();
+        assert_eq!(dbg!(str::from_utf8(&buf[..count])), Ok(new));
+    }
+
+    assert_eq!(dbg!(crate::chdir(current)), Ok(0));
+    {
+        let mut buf = [0; 4096];
+        let count = dbg!(crate::getcwd(&mut buf)).unwrap();
+        assert_eq!(dbg!(str::from_utf8(&buf[..count])), Ok(current));
+    }
+}
+
+//TODO: chmod
+
+#[test]
+fn clone() {
+    let expected_status = 42;
+    let pid_res = unsafe { crate::clone(crate::CloneFlags::empty()) };
+    if pid_res == Ok(0) {
+        crate::exit(expected_status).unwrap();
+        panic!("failed to exit");
+    } else {
+        let pid = dbg!(pid_res).unwrap();
+        let mut status = 0;
+        assert_eq!(dbg!(crate::waitpid(pid, &mut status, crate::WaitFlags::empty())), Ok(pid));
+        assert_eq!(dbg!(crate::wifexited(status)), true);
+        assert_eq!(dbg!(crate::wexitstatus(status)), expected_status);
+    }
+}
+
+//TODO: close
+
+#[test]
+fn clock_gettime() {
+    let mut tp = crate::TimeSpec::default();
+    assert_eq!(dbg!(
+        crate::clock_gettime(crate::CLOCK_MONOTONIC, &mut tp)
+    ), Ok(0));
+    assert_ne!(dbg!(tp), crate::TimeSpec::default());
+
+    tp = crate::TimeSpec::default();
+    assert_eq!(dbg!(
+        crate::clock_gettime(crate::CLOCK_REALTIME, &mut tp)
+    ), Ok(0));
+    assert_ne!(dbg!(tp), crate::TimeSpec::default());
+}
+
+//TODO: dup
+
+//TODO: dup2
+
+//TODO: exit (handled by clone?)
+
+//TODO: fchmod
+
+//TODO: fcntl
+
+#[test]
+fn fexec() {
+    let name = "file:/bin/ls";
+
+    let fd = dbg!(
+        crate::open(name, crate::O_RDONLY | crate::O_CLOEXEC)
+    ).unwrap();
+
+    let args = &[
+        [name.as_ptr() as usize, name.len()]
+    ];
+
+    let vars = &[];
+
+    let pid_res = unsafe { crate::clone(crate::CloneFlags::empty()) };
+    if pid_res == Ok(0) {
+        crate::fexec(fd, args, vars).unwrap();
+        panic!("failed to fexec");
+    } else {
+        assert_eq!(dbg!(crate::close(fd)), Ok(0));
+
+        let pid = dbg!(pid_res).unwrap();
+        let mut status = 0;
+        assert_eq!(dbg!(crate::waitpid(pid, &mut status, crate::WaitFlags::empty())), Ok(pid));
+        assert_eq!(dbg!(crate::wifexited(status)), true);
+        assert_eq!(dbg!(crate::wexitstatus(status)), 0);
+    }
+}
+
+#[test]
+fn fmap() {
+    use std::slice;
+
+    let fd = dbg!(
+        crate::open(
+            "file:/tmp/syscall-tests-fmap",
+            crate::O_CREAT | crate::O_RDWR | crate::O_CLOEXEC
+        )
+    ).unwrap();
+
+    let size = 128;
+
+    let map = unsafe {
+        slice::from_raw_parts_mut(
+            dbg!(
+                crate::fmap(fd, &crate::Map {
+                    address: 0,
+                    offset: 0,
+                    size,
+                    flags: crate::PROT_READ | crate::PROT_WRITE
+                })
+            ).unwrap() as *mut u8,
+            128
+        )
+    };
+
+    // Maps should be available after closing
+    assert_eq!(dbg!(crate::close(fd)), Ok(0));
+
+    for i in 0..128 {
+        map[i as usize] = i;
+        assert_eq!(map[i as usize], i);
+    }
+
+    //TODO: add msync
+    unsafe {
+        assert_eq!(dbg!(
+            crate::funmap(map.as_mut_ptr() as usize, size)
+        ), Ok(0));
+    }
+}
+
+// funmap tested by fmap
+
+#[test]
+fn fpath() {
+    use std::str;
+
+    let path = "file:/tmp/syscall-tests-fpath";
+    let fd = dbg!(
+        crate::open(
+            dbg!(path),
+            crate::O_CREAT | crate::O_RDWR | crate::O_CLOEXEC
+        )
+    ).unwrap();
+
+    let mut buf = [0; 4096];
+    let count = dbg!(
+        crate::fpath(fd, &mut buf)
+    ).unwrap();
+
+    assert_eq!(dbg!(str::from_utf8(&buf[..count])), Ok(path));
+
+    assert_eq!(dbg!(crate::close(fd)), Ok(0));
+}
+
+//TODO: frename
+
+#[test]
+fn fstat() {
+    let path = "file:/tmp/syscall-tests-fstat";
+    let fd = dbg!(
+        crate::open(
+            dbg!(path),
+            crate::O_CREAT | crate::O_RDWR | crate::O_CLOEXEC
+        )
+    ).unwrap();
+
+    let mut stat = crate::Stat::default();
+    assert_eq!(dbg!(crate::fstat(fd, &mut stat)), Ok(0));
+    assert_ne!(dbg!(stat), crate::Stat::default());
+
+    assert_eq!(dbg!(crate::close(fd)), Ok(0));
+}
+
+#[test]
+fn fstatvfs() {
+    let path = "file:/tmp/syscall-tests-fstatvfs";
+    let fd = dbg!(
+        crate::open(
+            dbg!(path),
+            crate::O_CREAT | crate::O_RDWR | crate::O_CLOEXEC
+        )
+    ).unwrap();
+
+    let mut statvfs = crate::StatVfs::default();
+    assert_eq!(dbg!(crate::fstatvfs(fd, &mut statvfs)), Ok(0));
+    assert_ne!(dbg!(statvfs), crate::StatVfs::default());
+
+    assert_eq!(dbg!(crate::close(fd)), Ok(0));
+}
+
+//TODO: fsync
+
+//TODO: ftruncate
+
+//TODO: futimens
+
+//TODO: futex
+
+// getcwd tested by chdir
+
+#[test]
+fn getegid() {
+    assert_eq!(crate::getegid(), Ok(0));
+}
+
+#[test]
+fn getens() {
+    assert_eq!(crate::getens(), Ok(1));
+}
+
+#[test]
+fn geteuid() {
+    assert_eq!(crate::geteuid(), Ok(0));
+}
+
+#[test]
+fn getgid() {
+    assert_eq!(crate::getgid(), Ok(0));
+}
+
+#[test]
+fn getns() {
+    assert_eq!(crate::getns(), Ok(1));
+}
+
+//TODO: getpid
+
+//TODO: getpgid
+
+//TODO: getppid
+
+#[test]
+fn getuid() {
+    assert_eq!(crate::getuid(), Ok(0));
+}
+
+//TODO: iopl
+
+//TODO: kill
+
+//TODO: link (probably will not work)
+
+#[test]
+fn lseek() {
+    let path = "file:/tmp/syscall-tests-lseek";
+    let fd = dbg!(
+        crate::open(
+            dbg!(path),
+            crate::O_CREAT | crate::O_RDWR | crate::O_CLOEXEC
+        )
+    ).unwrap();
+
+    {
+        let mut buf = [0; 256];
+        for i in 0..buf.len() {
+            buf[i] = i as u8;
+        }
+        assert_eq!(dbg!(crate::write(fd, &buf)), Ok(buf.len()));
+
+        assert_eq!(dbg!(crate::lseek(fd, 0, crate::SEEK_CUR)), Ok(buf.len()));
+        assert_eq!(dbg!(crate::lseek(fd, 0, crate::SEEK_SET)), Ok(0));
+        assert_eq!(dbg!(crate::lseek(fd, 0, crate::SEEK_END)), Ok(buf.len()));
+        assert_eq!(dbg!(crate::lseek(fd, 0, crate::SEEK_SET)), Ok(0));
+    }
+
+    {
+        let mut buf = [0; 256];
+        assert_eq!(dbg!(crate::read(fd, &mut buf)), Ok(buf.len()));
+        for i in 0..buf.len() {
+            assert_eq!(buf[i], i as u8);
+        }
+
+        assert_eq!(dbg!(crate::lseek(fd, 0, crate::SEEK_CUR)), Ok(buf.len()));
+        assert_eq!(dbg!(crate::lseek(fd, 0, crate::SEEK_SET)), Ok(0));
+        assert_eq!(dbg!(crate::lseek(fd, 0, crate::SEEK_END)), Ok(buf.len()));
+        assert_eq!(dbg!(crate::lseek(fd, 0, crate::SEEK_SET)), Ok(0));
+    }
+
+    assert_eq!(dbg!(crate::close(fd)), Ok(0));
+}
+
+//TODO: mkns
+
+//TODO: mprotect
+
+#[test]
+fn nanosleep() {
+    let req = crate::TimeSpec {
+        tv_sec: 0,
+        tv_nsec: 0,
+    };
+    let mut rem = crate::TimeSpec::default();
+    assert_eq!(crate::nanosleep(&req, &mut rem), Ok(0));
+    assert_eq!(rem, crate::TimeSpec::default());
+}
+
+//TODO: open
+
+//TODO: physalloc
+
+//TODO: physfree
+
+//TODO: physmap
+
+//TODO: physunmap
+
+#[test]
+fn pipe2() {
+    let mut fds = [0, 0];
+    assert_eq!(dbg!(crate::pipe2(&mut fds, crate::O_CLOEXEC)), Ok(0));
+    assert_ne!(dbg!(fds), [0, 0]);
+
+    {
+        let mut buf = [0; 256];
+        for i in 0..buf.len() {
+            buf[i] = i as u8;
+        }
+        assert_eq!(dbg!(crate::write(fds[1], &buf)), Ok(buf.len()));
+    }
+
+    {
+        let mut buf = [0; 256];
+        assert_eq!(dbg!(crate::read(fds[0], &mut buf)), Ok(buf.len()));
+        for i in 0..buf.len() {
+            assert_eq!(buf[i], i as u8);
+        }
+    }
+
+    assert_eq!(dbg!(crate::close(fds[0])), Ok(0));
+    assert_eq!(dbg!(crate::close(fds[1])), Ok(0));
+}
+
+//TODO: read
+
+#[test]
+fn rmdir() {
+    let path = "file:/tmp/syscall-tests-rmdir";
+    let fd = dbg!(
+        crate::open(
+            dbg!(path),
+            crate::O_CREAT | crate::O_DIRECTORY | crate::O_CLOEXEC
+        )
+    ).unwrap();
+
+    assert_eq!(dbg!(crate::close(fd)), Ok(0));
+
+    assert_eq!(dbg!(crate::rmdir(path)), Ok(0));
+}
+
+//TODO: setpgid
+
+//TODO: setregid
+
+//TODO: setrens
+
+//TODO: setreuid
+
+//TODO: sigaction
+
+//TODO: sigprocmask
+
+//TODO: sigreturn
+
+#[test]
+fn umask() {
+    let old = dbg!(crate::umask(0o244)).unwrap();
+    assert_eq!(dbg!(crate::umask(old)), Ok(0o244));
+}
+
+#[test]
+fn unlink() {
+    let path = "file:/tmp/syscall-tests-unlink";
+    let fd = dbg!(
+        crate::open(
+            dbg!(path),
+            crate::O_CREAT | crate::O_RDWR | crate::O_CLOEXEC
+        )
+    ).unwrap();
+
+    assert_eq!(dbg!(crate::close(fd)), Ok(0));
+
+    assert_eq!(dbg!(crate::unlink(path)), Ok(0));
+}
+
+//TODO: virttophys
+
+// waitpid tested by clone
+
+//TODO: write
+
+#[test]
+fn sched_yield() {
+    assert_eq!(dbg!(crate::sched_yield()), Ok(0));
+}
+
+#[test]
+fn sigaction() {
+    use std::{
+        mem,
+        sync::atomic::{AtomicBool, Ordering}
+    };
+
+    static SA_HANDLER_WAS_RAN: AtomicBool = AtomicBool::new(false);
+    static SA_HANDLER_2_WAS_IGNORED: AtomicBool = AtomicBool::new(false);
+
+    let child = unsafe { crate::clone(crate::CLONE_VM).unwrap() };
+
+    if child == 0 {
+        let pid = crate::getpid().unwrap();
+
+        extern "C" fn hello_im_a_signal_handler(signal: usize) {
+            assert_eq!(signal, crate::SIGUSR1);
+            SA_HANDLER_WAS_RAN.store(true, Ordering::SeqCst);
+        }
+
+        let my_signal_handler = crate::SigAction {
+            sa_handler: Some(hello_im_a_signal_handler),
+            ..Default::default()
+        };
+        crate::sigaction(crate::SIGUSR1, Some(&my_signal_handler), None).unwrap();
+
+        crate::kill(pid, crate::SIGUSR1).unwrap(); // calls handler
+
+        let mut old_signal_handler = crate::SigAction::default();
+        crate::sigaction(
+            crate::SIGUSR1,
+            Some(&crate::SigAction {
+                sa_handler: unsafe { mem::transmute::<usize, Option<extern "C" fn(usize)>>(crate::SIG_IGN) },
+                ..Default::default()
+            }),
+            Some(&mut old_signal_handler)
+        ).unwrap();
+        assert_eq!(my_signal_handler, old_signal_handler);
+
+        crate::kill(pid, crate::SIGUSR1).unwrap(); // does nothing
+
+        SA_HANDLER_2_WAS_IGNORED.store(true, Ordering::SeqCst);
+
+        crate::sigaction(
+            crate::SIGUSR1,
+            Some(&crate::SigAction {
+                sa_handler: unsafe { mem::transmute::<usize, Option<extern "C" fn(usize)>>(crate::SIG_DFL) },
+                ..Default::default()
+            }),
+            Some(&mut old_signal_handler)
+        ).unwrap();
+
+        crate::kill(pid, crate::SIGUSR1).unwrap(); // actually exits
+    } else {
+        let mut status = 0;
+        dbg!(crate::waitpid(child, &mut status, crate::WaitFlags::empty())).unwrap();
+
+        assert!(crate::wifsignaled(status));
+        assert_eq!(crate::wtermsig(status), crate::SIGUSR1);
+
+        assert!(SA_HANDLER_WAS_RAN.load(Ordering::SeqCst));
+        assert!(SA_HANDLER_2_WAS_IGNORED.load(Ordering::SeqCst));
+    }
+}