From be7681bd794872e6c4916ec28e4628aa543703c4 Mon Sep 17 00:00:00 2001
From: Tianhao Wang <wth@riseup.net>
Date: Tue, 5 Mar 2024 04:57:45 +0100
Subject: thredding 1/?

---
 src/arch/x86_64/context.rs | 28 ++++++++++++++++++++++++++++
 src/arch/x86_64/mod.rs     |  1 +
 2 files changed, 29 insertions(+)
 create mode 100644 src/arch/x86_64/context.rs

(limited to 'src')

diff --git a/src/arch/x86_64/context.rs b/src/arch/x86_64/context.rs
new file mode 100644
index 0000000..08fd3b6
--- /dev/null
+++ b/src/arch/x86_64/context.rs
@@ -0,0 +1,28 @@
+/// 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 715c19f..03d2af0 100644
--- a/src/arch/x86_64/mod.rs
+++ b/src/arch/x86_64/mod.rs
@@ -3,3 +3,4 @@ pub mod interrupt;
 pub mod io_port;
 pub mod mem;
 pub mod misc;
+pub mod context;
-- 
cgit v1.2.3-70-g09d2