Allocate space for a kstack

src/PCB.h

@@ -61,7 +61,7 @@ typedef struct
     page_directory_entry* mem;
     volatile int pid;
     struct process* parent;
-    char* kstack;//apparently we need this. idk why
+    char* kstack; //apparently we need this. idk why
     trapframe* tf;
     context* ctxt;
     char name[32];

src/elf.c

@@ -69,6 +69,9 @@ void load_elf(elf_header* elf_start)
     pcb->ctxt = (context*)((size_t)pcb + sizeof(process));
     pcb->tf = (trapframe*)((size_t)pcb + sizeof(process) + sizeof(context));
 
+    // And of course, a kstack
+    pcb->kstack = (char*)kmalloc(0x1000);
+
     pcb->mem = pgdir;
     pcb->pid = -1;
     pcb->parent = 0;