did some restructuring, got multitasking almost working

2026-06-26 20:05:01 -05:00
parent 57d7d34c6d
commit 43bc0df81a
35 changed files with 481 additions and 307 deletions
--- a/kernel/syscall.S
+++ b/kernel/syscall.S
@@ -0,0 +1,36 @@
+.code32 
+.global syscall_handler
+.extern syscall
+syscall_handler: 
+    cli
+
+    push $0
+    push $0x80
+
+    pusha
+
+    push %ds
+    push %es
+    push %fs
+    push %gs
+
+    mov $0x10, %ax               
+    mov %ax, %ds
+    mov %ax, %es
+    mov %ax, %fs
+    mov %ax, %gs
+    
+    push %esp
+    call syscall
+    add $4, %esp
+    
+    mov 28(%esp), %eax
+
+    pop %gs
+    pop %fs
+    pop %es
+    pop %ds
+
+    popa
+    add $8, %esp
+    iret