From 1b6a04ca5504955c571d1c97504fb45ea0befee4 Mon Sep 17 00:00:00 2001
From: Valentin Popov <valentin@popov.link>
Date: Mon, 8 Jan 2024 01:21:28 +0400
Subject: Initial vendor packages

Signed-off-by: Valentin Popov <valentin@popov.link>
---
 vendor/redox_syscall/src/arch/x86_64.rs | 157 ++++++++++++++++++++++++++++++++
 1 file changed, 157 insertions(+)
 create mode 100644 vendor/redox_syscall/src/arch/x86_64.rs

(limited to 'vendor/redox_syscall/src/arch/x86_64.rs')

diff --git a/vendor/redox_syscall/src/arch/x86_64.rs b/vendor/redox_syscall/src/arch/x86_64.rs
new file mode 100644
index 0000000..2ff57bb
--- /dev/null
+++ b/vendor/redox_syscall/src/arch/x86_64.rs
@@ -0,0 +1,157 @@
+use core::{mem, slice};
+use core::arch::asm;
+use core::ops::{Deref, DerefMut};
+
+use super::error::{Error, Result};
+
+pub const PAGE_SIZE: usize = 4096;
+
+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>())
+        }
+    }
+}
-- 
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