Remove the shim kernel crate

kernel/src/arch/x86/cpu.rs

@@ -0,0 +1,102 @@
+// SPDX-License-Identifier: MPL-2.0
+
+use ostd::{
+    cpu::{RawGeneralRegs, UserContext},
+    Pod,
+};
+
+use crate::cpu::LinuxAbi;
+
+impl LinuxAbi for UserContext {
+    fn syscall_num(&self) -> usize {
+        self.rax()
+    }
+
+    fn syscall_ret(&self) -> usize {
+        self.rax()
+    }
+
+    fn set_syscall_ret(&mut self, ret: usize) {
+        self.set_rax(ret);
+    }
+
+    fn syscall_args(&self) -> [usize; 6] {
+        [
+            self.rdi(),
+            self.rsi(),
+            self.rdx(),
+            self.r10(),
+            self.r8(),
+            self.r9(),
+        ]
+    }
+
+    fn set_tls_pointer(&mut self, tls: usize) {
+        self.set_fsbase(tls);
+    }
+
+    fn tls_pointer(&self) -> usize {
+        self.fsbase()
+    }
+}
+
+/// General-purpose registers.
+#[derive(Debug, Clone, Copy, Pod, Default)]
+#[repr(C)]
+pub struct GpRegs {
+    pub rax: usize,
+    pub rbx: usize,
+    pub rcx: usize,
+    pub rdx: usize,
+    pub rsi: usize,
+    pub rdi: usize,
+    pub rbp: usize,
+    pub rsp: usize,
+    pub r8: usize,
+    pub r9: usize,
+    pub r10: usize,
+    pub r11: usize,
+    pub r12: usize,
+    pub r13: usize,
+    pub r14: usize,
+    pub r15: usize,
+    pub rip: usize,
+    pub rflags: usize,
+    pub fsbase: usize,
+    pub gsbase: usize,
+}
+
+macro_rules! copy_gp_regs {
+    ($src: ident, $dst: ident) => {
+        $dst.rax = $src.rax;
+        $dst.rbx = $src.rbx;
+        $dst.rcx = $src.rcx;
+        $dst.rdx = $src.rdx;
+        $dst.rsi = $src.rsi;
+        $dst.rdi = $src.rdi;
+        $dst.rbp = $src.rbp;
+        $dst.rsp = $src.rsp;
+        $dst.r8 = $src.r8;
+        $dst.r9 = $src.r9;
+        $dst.r10 = $src.r10;
+        $dst.r11 = $src.r11;
+        $dst.r12 = $src.r12;
+        $dst.r13 = $src.r13;
+        $dst.r14 = $src.r14;
+        $dst.r15 = $src.r15;
+        $dst.rip = $src.rip;
+        $dst.rflags = $src.rflags;
+        $dst.fsbase = $src.fsbase;
+        $dst.gsbase = $src.gsbase;
+    };
+}
+
+impl GpRegs {
+    pub fn copy_to_raw(&self, dst: &mut RawGeneralRegs) {
+        copy_gp_regs!(self, dst);
+    }
+
+    pub fn copy_from_raw(&mut self, src: &RawGeneralRegs) {
+        copy_gp_regs!(src, self);
+    }
+}