degbug and i dunno maybe i fixed something cr3 is wrong i know that plz help

src/PCB.c

 #include "PCB.h"
 #include "serial.h"
 #include "term.h"
+#include "idt.h"
 #define NUM_SYSCALLS 256
 #define NUM_PROCS 16
 
@@ -26,13 +27,19 @@ void settf(trapframe* tf)
 void schedule()
 {
     int old = curproc;
-    curproc++;
-    while(procs[curproc]==0 || procs[curproc]->state!=RUNNABLE)
+    curproc=0;//++;
+    /*while(procs[curproc]==0 || procs[curproc]->state!=RUNNABLE)
     {
         curproc=(curproc<NUM_PROCS-1)?curproc+1:0;
-    }
-    serial_writestring("about to switch\n");
-    //context_switch(&procs[old]->ctxt, procs[curproc]->ctxt);
+        }*/
+    serial_writestring("about to switch\nto ctxt at: ");
+    serial_hexword((uintptr_t)procs[curproc]->ctxt);
+    serial_writestring("\neip: ");
+    serial_hexword(procs[curproc]->ctxt->eip);
+    serial_writestring("\ncr3: ");
+    serial_hexword(procs[curproc]->ctxt->cr3);
+    serial_writestring("\n");
+    context_switch(&procs[old]->ctxt, procs[curproc]->ctxt);
     serial_writestring("switched\n");
     //procs[old]->state=RUNNABLE;
     procs[curproc]->state=RUNNING;

src/PCB.h

@@ -28,8 +28,8 @@ typedef struct//all regs in proc
 
     uint32_t trap;
 
-    uint32_t mmm;
-    uint32_t why;
+    //uint32_t mmm;
+    //uint32_t why;
 
     uint32_t err;
 

src/elf.c

@@ -5,10 +5,14 @@
 */
 
 #include "elf.h"
+#include "idt.h"
 
 void load_elf(elf_header* elf_start)
 {
     // The elf will get its own memory space.
+    serial_writestring("_elf_start entry: ");
+    serial_hexword((uintptr_t)elf_start->program_entry_position);
+    serial_writestring("\n");
     page_directory_entry* pgdir = page_new_directory();
 
     void* highest_vpage = (void*)0;
@@ -65,12 +69,15 @@ void load_elf(elf_header* elf_start)
     page_map(pgdir, highest_vpage + 0x2000);
     // initial esp = highest_vpage + 0x1000
 
-    process* pcb = kmalloc(sizeof(process) + sizeof(context) + sizeof(trapframe));
-    pcb->ctxt = (context*)((size_t)pcb + sizeof(process));
-    pcb->tf = (trapframe*)((size_t)pcb + sizeof(process) + sizeof(context));
+    process* pcb = kmalloc(sizeof(process));// + sizeof(context) + sizeof(trapframe));
+    //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->tf = (trapframe*)(pcb->kstack);// + sizeof(trapframe));
+    pcb->ctxt = (context*)(pcb->tf + sizeof(trapframe));//sizeof(context));
+    
     
     pcb->mem = pgdir;
     pcb->pid = -1;
@@ -79,13 +86,15 @@ void load_elf(elf_header* elf_start)
     //pcb->name = "debugstuff";
     pcb->state = RUNNABLE;
 
-    pcb->ctxt->cr3 = pgdir;
+    pcb->ctxt->cr3 = (uintptr_t)pgdir;
     pcb->ctxt->edi = 0;
     pcb->ctxt->esi = 0;
     pcb->ctxt->ebx = 0;
-    pcb->ctxt->ebp = (uint32_t)highest_vpage + 0x1000;
-    pcb->ctxt->eip = (uint32_t)elf_start->program_entry_position;
+    pcb->ctxt->ebp = (uintptr_t)pcb->tf;//(uint32_t)highest_vpage + 0x1000;
+    pcb->ctxt->eip = (uintptr_t)default_handler;//(uint32_t)elf_start->program_entry_position;
 
+    pcb->tf->eax = 4;
+    pcb->tf->trap = 0x80;
     pcb->tf->ebp = (uint32_t)highest_vpage + 0x1000;
     pcb->tf->eip = (uint32_t)elf_start->program_entry_position;
 

src/elf.h

@@ -5,7 +5,7 @@
 */
 
 #ifndef _ELF_INC
-#define _ELF_INT
+#define _ELF_INC
 
 #include <stdint.h>
 #include <stddef.h>

src/kern.c

@@ -86,7 +86,9 @@ void kernel_main(multiboot_info* mbt, uint32_t magic)
     
     pit_init();
     pit_start_counter(100, PIT_OCW_CONT_0, PIT_OCW_MODE_SQWVGEN);
-    serial_writestring("enabling interrupts\n");
+    serial_writestring("_kernel_end: ");
+    serial_hexword((uintptr_t)&_kernel_end);
+    serial_writestring("\nenabling interrupts\n");
     enable_int();
 
 

src/mem.c

@@ -53,6 +53,10 @@ void* page_allocate()
     *index = *index | (1<<i);
 
     uint32_t page_number = ((uint32_t)(index - (uint8_t*)_kernel_end) * 8) + (8-i);
+    //serial_hexword(page_number);
+    //serial_writestring(" page allocated at address ");
+    //serial_hexword((uintptr_t)(void*)&_kernel_end + 0x1000 * page_number);
+    //serial_writestring("\n");
     return (void*)&_kernel_end + 0x1000 * page_number;
 }
 

src/switch.asm

@@ -10,6 +10,10 @@ context_switch:
         mov ecx, cr3
         push ecx
 
+        ; CR3 PROBLEM - STACK CHANGES, CANT ACCESS NEW MEM?
+        ; WHY IS PROCS[CURPROC]->CTXT IN PROCESS MEM, NOT
+        ; IN KERNEL MEM? INTERROGATE FREMMA
+
         mov [eax], esp
         mov esp, edx