From 4cf4fb0dda35616eb00b58d4920baa7e6459e053 Mon Sep 17 00:00:00 2001
From: xamidev <xamidev@riseup.net>
Date: Fri, 20 Feb 2026 16:01:34 +0100
Subject: [PATCH] Task switching fix? but doesnt exit process gracefully

---
 .gitignore            |  3 ++-
 Makefile              |  4 ++++
 src/idt/idt.c         | 12 ++++++------
 src/kmain.c           |  6 +++++-
 src/sched/process.c   |  2 ++
 src/sched/scheduler.c |  6 +++---
 6 files changed, 22 insertions(+), 11 deletions(-)

diff --git a/.gitignore b/.gitignore
index 3e041d8..a3f06dd 100644
--- a/.gitignore
+++ b/.gitignore
@@ -6,4 +6,5 @@ iso_root
 *.iso
 *.gch
 */*.gch
-*/*/*.gch
\ No newline at end of file
+*/*/*.gch
+.gdb_history
\ No newline at end of file
diff --git a/Makefile b/Makefile
index 13cd618..761f074 100644
--- a/Makefile
+++ b/Makefile
@@ -36,6 +36,10 @@ debug:
 	/usr/bin/qemu-system-x86_64 -drive file=pepper.iso -s -S -d int -no-reboot -no-shutdown &
 	gdb pepperk --command=debug.gdb
 
+debug2:
+	/usr/bin/qemu-system-x86_64 -drive file=pepper.iso -s -S -d int -no-reboot -no-shutdown &
+	pwndbg pepperk --command=debug.gdb
+
 run: build-iso
 	/usr/bin/qemu-system-x86_64 -cdrom pepper.iso -serial stdio
 
diff --git a/src/idt/idt.c b/src/idt/idt.c
index 61e402c..7e559f4 100644
--- a/src/idt/idt.c
+++ b/src/idt/idt.c
@@ -197,17 +197,17 @@ struct cpu_status_t* interrupt_dispatch(struct cpu_status_t* context)
 
         case 32: // Timer Interrupt
             ticks++;
+            // Send an EOI so that we can continue having interrupts
+            outb(0x20, 0x20);
 
             if (ticks % SCHEDULER_QUANTUM == 0)
             {
-                CLEAR_INTERRUPTS;
-                struct cpu_status_t* current_ctx = scheduler_schedule(context);
-                process_switch(current_ctx->iret_rsp, current_ctx->iret_rip);
-                SET_INTERRUPTS;
+                return scheduler_schedule(context);
+                //struct cpu_status_t* current_ctx = scheduler_schedule(context);
+                //process_switch(current_ctx->iret_rsp, current_ctx->iret_rip);
+                //SET_INTERRUPTS;
             }
 
-            // Send an EOI so that we can continue having interrupts
-            outb(0x20, 0x20);
             break;
 
         case 33:
diff --git a/src/kmain.c b/src/kmain.c
index 856d336..d9aac09 100644
--- a/src/kmain.c
+++ b/src/kmain.c
@@ -35,7 +35,7 @@ void hcf()
 }
 
 // Doing nothing (can be interrupted)
-void idle() {for(;;)asm("hlt");}
+void idle() {SET_INTERRUPTS; for(;;)asm("hlt");}
 
 uint8_t kernel_stack[KERNEL_STACK_SIZE] __attribute__((aligned(16)));
 
@@ -110,12 +110,16 @@ void kmain()
 
 	vmm_init();
 	
+	struct process_t* idle_proc = process_create("idle", (void*)idle_main, 0);
 	struct process_t* pedicel = process_create("pedicel", (void*)pedicel_main, 0);
 	
 	process_display_list(processes_list);
 
 	scheduler_init();
 
+	current_process = idle_proc; 
+    current_process->status = RUNNING;
+
 	SET_INTERRUPTS;
 
 	keyboard_init(FR);
diff --git a/src/sched/process.c b/src/sched/process.c
index 7566bbf..28945ad 100644
--- a/src/sched/process.c
+++ b/src/sched/process.c
@@ -160,6 +160,7 @@ void process_switch(uint64_t stack_addr, uint64_t code_addr)
 // Just mark as DEAD then idle. Scheduler will delete process at next timer interrupt % quantum.
 void process_exit()
 {
+    DEBUG("Exiting from process '%s'", current_process->name);
     CLEAR_INTERRUPTS;
     if (current_process)
     {
@@ -167,6 +168,7 @@ void process_exit()
     }
     SET_INTERRUPTS;
     
+    outb(0x20, 0x20);
     for (;;)
     {
         asm("hlt");
diff --git a/src/sched/scheduler.c b/src/sched/scheduler.c
index 645d845..1e2e98d 100644
--- a/src/sched/scheduler.c
+++ b/src/sched/scheduler.c
@@ -8,6 +8,7 @@
 #include "process.h"
 #include "mem/paging/paging.h"
 #include <stdint.h>
+#include "io/serial/serial.h"
 
 extern struct process_t* processes_list;
 extern struct process_t* current_process;
@@ -20,7 +21,7 @@ void scheduler_init()
 
 struct cpu_status_t* scheduler_schedule(struct cpu_status_t* context)
 {
-    //current_process->context = context;
+    current_process->context = context;
     current_process->status = READY;
 
     for (;;) {
@@ -49,7 +50,6 @@ struct cpu_status_t* scheduler_schedule(struct cpu_status_t* context)
 
     load_cr3(VIRT_TO_PHYS((uint64_t)current_process->root_page_table));
     DEBUG("loaded process pml4 into cr3");
-    /* process_switch(current_process->context->rbp, current_process->context->iret_rip);
-    DEBUG("switched to process rip!"); */
+
     return current_process->context;
 }
\ No newline at end of file