sched: add kernel-mode context switching

2023-04-30 14:27:57 +01:00
parent 2cb2d9100a
commit 085c3d2a89
12 changed files with 340 additions and 27 deletions
--- a/arch/x86_64/thread.c
+++ b/arch/x86_64/thread.c
@@ -0,0 +1,20 @@
+#include <socks/machine/thread.h>
+
+struct thread_ctx {
+	uint64_t r15, r14, r13, r12, r11, r10, r9, r8;
+	uint64_t rdi, rsi, rbp, unused_rsp, rbx, rdx, rcx, rax;
+	uint64_t rfl;
+} __packed;
+
+void prepare_stack(uintptr_t ip, uintptr_t *sp)
+{
+	(*sp) -= sizeof(uintptr_t);
+	uintptr_t *dest_ip = (uintptr_t *)(*sp);
+	*dest_ip = ip;
+
+	(*sp) -= sizeof(struct thread_ctx);
+	struct thread_ctx *ctx = (struct thread_ctx *)(*sp);
+	memset(ctx, 0x0, sizeof *ctx);
+
+	ctx->rfl = 0x202;
+}