working on getting a unified stack setup for user and kernel tasks

kernel/kmain.c

@@ -129,10 +129,9 @@ void load_root_program(const char* path) {
   *(--u_esp) = 0;          // argc = 0
 
   create_task(e_hdr->e_entry, (uint32_t)cr3, 1, (uint32_t)u_esp);
+
   load_pd((void*)kernel_cr3);
   flush_tlb();
-
-  kprintf("task created for origin program %s\n", path);
 }
 
 void kmain(uint32_t magic, multiboot_info* mbi)  {
@@ -168,10 +167,10 @@ void kmain(uint32_t magic, multiboot_info* mbi)  {
   mount(vfs_root, initrd_root);
   kprintf("initrd read, mounted @ /\n");
 
+  disable_interrupts();
   init_scheduler();
   enable_interrupts();
 
   kprintf("loading origin program\n");
   load_root_program("/origin.elf");
-  yield();
 }

kernel/scheduler.c

@@ -138,6 +138,8 @@ int create_task(uint32_t entry_point, uint32_t cr3, int user, uint32_t u_esp) {
         *(--esp) = 0x23;
     } else {
         // IRET values for Ring 0
+        *(--esp) = 0x23;            // User Data Segment (SS) with RPL 3 (0x20 | 3)
+        *(--esp) = kstack_top;      // User Stack Pointer (ESP) - location mapped in user space
         *(--esp) = 0x0202;          // EFLAGS
         *(--esp) = 0x08;            // Kernel Code Segment (CS)
         *(--esp) = entry_point;     // EIP
@@ -153,6 +155,12 @@ int create_task(uint32_t entry_point, uint32_t cr3, int user, uint32_t u_esp) {
     *(--esp) = 0;             // ESI
     *(--esp) = 0;             // EDI
 
+    if (user) {
+        *(--esp) = 0x23;            // User Data Segment
+    } else {
+        *(--esp) = 0x10;            // Kernel Data Segment
+    }
+
     process->esp = (uint32_t)esp;
     if (!reuse) {
         total_processes++;