proc: interrupt: define context and trap frame

Signed-off-by: Tianhao Wang <shrik3@mailbox.org>

3 files changed, 44 insertions, 29 deletions

diff --git a/src/arch/x86_64/arch_regs.rs b/src/arch/x86_64/arch_regs.rs
new file mode 100644
index 0000000..a49926e
--- /dev/null
+++ b/src/arch/x86_64/arch_regs.rs
@@ -0,0 +1,43 @@
+use core::arch::asm;
+
+/// arch specific registers
+#[repr(C)]
+#[repr(packed)]
+#[derive(Debug)]
+pub struct Context64 {
+	pub rbx: u64,
+	pub r12: u64,
+	pub r13: u64,
+	pub r14: u64,
+	pub r15: u64,
+	pub rbp: u64,
+	pub rsp: u64,
+	pub fpu: [u8; 108],
+}
+
+/// arch specific registers
+#[repr(C)]
+#[repr(packed)]
+#[derive(Debug)]
+pub struct TrapFrame {
+	pub r11: u64,
+	pub r10: u64,
+	pub r9: u64,
+	pub r8: u64,
+	pub rsi: u64,
+	pub rdi: u64,
+	pub rdx: u64,
+	pub rcx: u64,
+	pub rax: u64,
+	pub err_code: u64,
+}
+
+// this will get the current (kernel) stack pointer
+#[inline]
+pub fn get_sp() -> u64 {
+	let sp: u64;
+	unsafe {
+		asm!("mov {}, rsp", out(reg) sp);
+	}
+	return sp;
+}
diff --git a/src/arch/x86_64/context.rs b/src/arch/x86_64/context.rs
deleted file mode 100644
index 6c46271..0000000
--- a/src/arch/x86_64/context.rs
+++ /dev/null
@@ -1,28 +0,0 @@
-/// high level representation of the callee saved registers for thread context. The caller
-/// saved registers will is pushed into the stack already upon the interrupt entry
-/// fpstate is NOT saved here
-#[repr(C)]
-pub struct Context {
-	rbx: u64,
-	r12: u64,
-	r13: u64,
-	r14: u64,
-	r15: u64,
-	rbp: u64,
-	rsp: u64,
-}
-
-/// prepare the thread (coroutine) for the first execution
-pub unsafe fn settle() {
-	todo!()
-	// it will be something like this...
-	// void **sp = (void**)tos;
-	// *(--sp) = object;      // 7th parameter for kickoff
-	// *(--sp) = (void*)0;    // return address
-	// *(--sp) = kickoff;            // address
-	// regs->rsp = sp;
-}
-
-pub unsafe fn switch(_ctx_curr: usize, _ctx_next: usize) {
-	todo!()
-}
diff --git a/src/arch/x86_64/mod.rs b/src/arch/x86_64/mod.rs
index 888cafd..ee51338 100644
--- a/src/arch/x86_64/mod.rs
+++ b/src/arch/x86_64/mod.rs
@@ -1,4 +1,4 @@
-pub mod context;
+pub mod arch_regs;
 pub mod interrupt;
 pub mod io_port;
 pub mod mem;