HEADmaster

1 files changed, 32 insertions, 0 deletions

diff --git a/kernel/loader.s b/kernel/loader.s
new file mode 100644
index 0000000..791c231
--- /dev/null
+++ b/kernel/loader.s
@@ -0,0 +1,32 @@
+global loader
+extern kmain
+
+section .text
+align 4
+STACKSIZE equ 0x4000
+
+
+loader:
+    ;setup the stack and call the kernel entry point
+    ; shouldn't really use it this way, but take the loading address and move that to rsp to get a working stack
+    mov rsp, stack+STACKSIZE
+    mov rbp, rsp
+
+    ; enable FPU, SSE    
+    mov rax, cr0
+    and ax, 0xFFFB
+    or ax, 0x2
+    mov cr0, rax
+    mov rax, cr4
+    or ax, 3 << 9 ; OSFXSR OSXMMEXCPT
+    mov cr4, rax
+
+    ; pass arguments we receiver, or maybe have to get them first fropm the stack
+    call kmain
+    hlt 
+
+
+section .bss
+align 32
+stack:
+    resb STACKSIZE