Very simple threading and context switching.

2018-01-05 17:07:22 +01:00
parent 63ae2a0b9d
commit 1e2f81a5d8
4 changed files with 132 additions and 0 deletions
--- a/src/kernel/proc/swtch.S
+++ b/src/kernel/proc/swtch.S
@@ -0,0 +1,25 @@
+.intel_syntax noprefix
+
+.global swtch
+
+swtch:
+  push rbp
+  mov rbp, rsp
+  push r15
+  push r14
+  push r13
+  push r12
+  push rbx
+  push rbp
+
+  mov [rdi], rsp
+  mov rsp, [rsi]
+
+  pop rbp
+  pop rbx
+  pop r12
+  pop r13
+  pop r14
+  pop r15
+  leaveq
+  ret