Rename & scheduler stuff

Makefile

@@ -30,7 +30,7 @@ LDFLAGS += -m elf_x86_64 \
     -z text \
     -z max-page-size=0x1000 \
     -T linker.ld
-NASMFLAGS = -f elf64
+NASMFLAGS = -f elf64 -g -F dwarf
 dependencies:
 	# build limine
 	rm -rf limine

README.md

@@ -1,4 +1,4 @@
-# SFB/25
+# Neobbo
 
 Hobby operating system for the x86_64 architecture written in C. Licensed under GPLv3
 
@@ -10,12 +10,12 @@ Then run `make all` - make sure to adjust the `CC`, `AS` and `LD` flags to match
 
 in the `build` folder you should have a `SFB25.iso` file.
 
-To try out SFB/25 you can use QEMU:
+To try out Neobbo you can use QEMU:
 
 `qemu-system-x86_64 build/SFB25.iso -machine q35 -m 512M`
 
 ## External projects
 
 - [Limine bootloader](https://github.com/limine-bootloader/limine) for the bootloader
-- [Flanterm](https://github.com/mintsuki/flanterm) for the terminal
+- [Flanterm](https://codeberg.org/mintsuki/flanterm) for the terminal
 - [uACPI](https://github.com/uacpi/uacpi) for the AML interpreter and other ACPI stuff

limine.conf

@@ -2,7 +2,7 @@
 timeout: 0
  
 # The entry name that will be displayed in the boot menu.
-/SFB/25 (KASLR on)
+/Neobbo (KASLR on)
     # We use the Limine boot protocol.
     protocol: limine
  
@@ -10,7 +10,7 @@ timeout: 0
     kernel_path: boot():/SFB25.elf
  
 # Same thing, but without KASLR.
-/SFB/25 (KASLR off)
+/Neobbo (KASLR off)
     # We use the Limine boot protocol.
     protocol: limine
 

src/drivers/ahci.c

@@ -1,5 +1,5 @@
 
-#include <SFB25.h>
+#include <neobbo.h>
 #include <kprint.h>
 #include "../hal/apic.h"
 #include "../sys/pci.h"

src/drivers/pmt.c

@@ -1,6 +1,6 @@
 #include "../sys/acpi.h"
 #include <kprint.h>
-#include <SFB25.h>
+#include <neobbo.h>
 #include <io.h>
 
 

src/hal/apic.c

@@ -5,7 +5,7 @@
 #include "ioapic.h"
 #include <lock.h>
 #include <kprint.h>
-#include <SFB25.h>
+#include <neobbo.h>
 #include <cpuid.h> // GCC specific
 
 #define LAPIC_ID_REG                0x020

src/hal/idt.c

@@ -3,7 +3,7 @@
 #include "timer.h"
 #include <kprint.h>
 #include <lock.h>
-#include <SFB25.h>
+#include <neobbo.h>
 idt_descriptor idt[256] = {0};
 
 idt_register idtr = {sizeof(idt)-1, (uint64_t)(&idt)};

src/hal/ioapic.c

@@ -1,7 +1,7 @@
 
 #include <stdint.h>
 #include <kprint.h>
-#include <SFB25.h>
+#include <neobbo.h>
 #include "../sys/acpi.h"
 #include "error.h"
 

src/hal/smp.c

@@ -2,7 +2,7 @@
 #include <stdbool.h>
 #include <stdint.h>
 #include <kprint.h>
-#include <SFB25.h>
+#include <neobbo.h>
 #include "gdt.h"
 #include "smp.h"
 #include "apic.h"

src/hal/timer.c

@@ -4,7 +4,7 @@
 #include "../drivers/pmt.h"
 #include "timer.h"
 #include <kprint.h>
-#include <SFB25.h>
+#include <neobbo.h>
 
 /* Determines which timer will be used for calibration */
 int calibration_timer = -1;

src/include/kprint.h

@@ -8,7 +8,7 @@ enum {
     LOG_SUCCESS,
 };
 
-void klog(const char *func, const char *msg);
+void klog(const char *func, const char *msg, ...);
 
 int kprintf(const char *format_string, ...);
 

src/lib/kprint.c

@@ -1,6 +1,7 @@
 #include <stdint.h>
 #include <stdarg.h>
 #include <stdbool.h>
+#include <stdio.h>
 #include <string.h>
 #include <lock.h>
 #include "../include/kprint.h"
@@ -22,7 +23,7 @@
 
 extern bool serial_enabled;
 
-void klog(const char *func, const char *msg){
+void klog(const char *func, const char *msg, ...){
     kprintf("{ksk}: {s}\n", ANSI_COLOR_MAGENTA, func, ANSI_COLOR_RESET, msg);
     serial_kprintf("{ksk}: {s}\n", ANSI_COLOR_MAGENTA, func, ANSI_COLOR_RESET, msg);
 

src/main.c

@@ -1,6 +1,6 @@
 #include <stdint.h>
 #include <stddef.h>
-#include <SFB25.h>
+#include <neobbo.h>
 #include <kprint.h>
 #include <string.h>
 #include "error.h"
@@ -78,7 +78,7 @@ void _start(void){
             0
     );
 
-    kprintf("Welcome to SFB/25{n}");
+    kprintf("Welcome to Neobbo{n}");
 
     extern link_symbol_ptr text_start_addr, text_end_addr;
 
@@ -90,59 +90,22 @@ void _start(void){
     klog("acpi", "Reading ACPI tables");
     acpi_init();
 
-
     klog("apic", "Initalizing APIC");
     apic_init();
 
-
     tsc_init();  
 
-
     klog("pmm", "Setting up the PMM");
     pmm_init();
 
 
     klog("vmm", "Setting up the page tables");
     vmm_init();
+
     init_page_array();
 
-
-    //struct ma_kcache *cache = ma_cache_create("bird", 1048576, 0, 0, 0);
-
-    //uint64_t *d = ma_cache_alloc(cache, 0);
-
-    //cache_info(cache);
-
-    //memset(d, 0, 1048576);
-
-    //for(;;);
-
-    //cache_info(cache);
-
     _kmalloc_init();
 
-    int *my_int;
-
-    for(int i = 0;i < 3000;i++){
-        my_int = kmalloc(512);
-        *my_int = rand();
-        kprintf("my int: {d} on iter: {d}\n", *my_int, i);
-        kstatus status = kfree(my_int);
-        if(status != KERNEL_STATUS_SUCCESS){
-            kprintf("status: {d}\n", status);
-        }
-        
-    }
-
-
-
-    kprintf("my int: {d}\n", *my_int);
-
-
-    
-
-    //for(;;){}
-
     klog("smp", "Starting APs");
     smp_init();
 
@@ -163,6 +126,7 @@ void _start(void){
 bool kernel_killed = false;
 void kkill(void){
     kernel_killed = true;
+    kprintf("The kernel has been killed.\n");
     asm volatile("cli; hlt");
     for(;;);
 }

src/mm/kmalloc.c

@@ -26,7 +26,7 @@ size_t sizes[14] = {16, 32, 64, 128, 256, 512, 1024, 4096, 8192, 32768, 65536, 1
 
 void *kmalloc(size_t size){
     if(size > 1048576){
-        klog(__func__, "Attempted to allocate more than max size (1M)");
+        klog(__func__, "Attempted to allocate {d} bytes, more than max size (1M)");
         return NULL;
     }
 

src/mm/page.c

@@ -1,7 +1,7 @@
 #include "page.h"
 #include <limine.h>
 #include "vmm.h"
-#include <SFB25.h>
+#include <neobbo.h>
 #include <stdatomic.h>
 #include <kprint.h>
 #include <stddef.h>

src/mm/pmm.c

@@ -1,6 +1,6 @@
 #include <limine.h>
 #include <kprint.h>
-#include <SFB25.h>
+#include <neobbo.h>
 #include <lock.h>
 #include "pmm.h"
 #include "kmalloc.h"

src/mm/slab.c

@@ -7,7 +7,7 @@
 #include "page.h"
 #include "slab.h"
 #include <kprint.h>
-#include <SFB25.h>
+#include <neobbo.h>
 #include <lock.h>
 
 struct ma_kcache *caches = NULL;
@@ -414,6 +414,8 @@ kstatus ma_cache_dealloc(void *object){
         return KERNEL_STATUS_ERROR;
     }
 
+    acquire_spinlock(&slab->lock);
+
     struct ma_bufctl *buf = addr_to_bufctl(object);
 
     if(buf == NULL){
@@ -432,6 +434,8 @@ kstatus ma_cache_dealloc(void *object){
         _ma_move_slab(slab, FREE);
     }
 
+    free_spinlock(&slab->lock);
+
     return KERNEL_STATUS_SUCCESS;
 
 }

src/mm/slab.h

@@ -21,6 +21,8 @@ struct ma_slab {
 
     uint32_t refcount; // The amount of active (not free) objects in the slabs
 
+    atomic_flag lock;
+
     struct ma_bufctl *free; // Linked list of free buffers in the slab. Is equal to NULL once there are no more free objects 
 };
 

src/mm/vmm.c

@@ -2,7 +2,7 @@
 #include <stdatomic.h>
 #include <stdint.h>
 #include <kprint.h>
-#include <SFB25.h>
+#include <neobbo.h>
 #include <string.h>
 #include <limine.h>
 #include "pmm.h"

src/scheduler/sched.asm

@@ -1,6 +1,7 @@
 
 global switch_context
 global get_context
+global restore_stack
 
 ;  switch_context(struct context *old, struct context *new)
 ;                       ^RDI                ^RSI 
@@ -31,6 +32,8 @@ switch_context:
 
     jmp [rsi + 0x38]
 
+
+
     ret
 
 
@@ -51,3 +54,8 @@ get_context:
     push r8
 
     ret
+; restore_stack(uint64_t rsp, uint64_t rbp)
+restore_stack:
+    mov rsp, rdi
+    mov rbp, rsi
+    ret

src/scheduler/sched.c

@@ -1,21 +1,24 @@
 #include <kprint.h>
+#include <stdint.h>
 #include <string.h>
-#include <SFB25.h>
+#include <neobbo.h>
 #include "../hal/smp.h"
 #include <error.h>
 #include "../mm/kmalloc.h"
 #include "sched.h"
 
-extern context *save_context();
+extern void get_context(struct context *ctx); 
 
 extern void switch_context(context *old, context *new);
 
+extern void restore_stack(uint64_t rsp, uint64_t rbp);
+
 #define QUANTUM_US 10000
 
 int next_pid = 1;
 
 void idle_task(){
-    kprintf("Hello world from bruhd task!\n");
+    kprintf("Hello world from idle task!\n");
 }
 
 void test_task(){
@@ -32,32 +35,22 @@ proc *alloc_process(void){
             proc *p = &proc_list[i];
 
             p->state = READY;
-            kprintf("pstate = 0x{x}\n", READY);
-            kprintf("actual: 0x{x}\n", p->state);
+
             p->kstack = kmalloc(INITIAL_STACK_SIZE);
-            kprintf("actua1l: 0x{x}\n", p->state);
 
             p->pid = next_pid++;
 
-            kprintf("actua2l: 0x{x}\n", p->state);
-
-            memset(&p->context, 0, sizeof(context));
-
-            kprintf("actua3l: 0x{x}\n", p->state);
-
             p->context.rbp = (uint64_t)p->kstack;
             p->context.rsp = (uint64_t)p->context.rbp + INITIAL_STACK_SIZE;
             
-            kprintf("actua4l: 0x{x}\n", p->state);
-
             return p;
         }
     }
 
-    kprintf("Couldn't find free process!");
+    klog(__func__, "Couldnt find free process!!!!!!\n");
 
 }
-kstatus add_task(uint64_t *entry){
+proc *add_task(uint64_t *entry){
     proc *proc = alloc_process();
 
     if (proc == NULL) {
@@ -67,7 +60,7 @@ kstatus add_task(uint64_t *entry){
 
     proc->context.rip = (uint64_t)entry;
 
-    return KERNEL_STATUS_SUCCESS;
+    return proc;
 }
 
 void scheduler_init(){
@@ -83,27 +76,32 @@ void scheduler_init(){
         kkill();
     }
 
-    kprintf("hi1\n");
     proc *proc_list = state->process_list;
 
     memset(proc_list, 0, sizeof(proc) * 512);
 
-    int pid = add_task((uint64_t*)idle_task);
+    proc *idle = add_task((uint64_t*)idle_task);
+
+    if(idle == NULL){
+        klog(__func__, "Failed to allocate idle task");
+        kkill();
+    }
+    
+    state->current_process = idle;
+    
     add_task((uint64_t*)test_task);
 
     for(;;){
         for(int i = 0; i < PROC_MAX; i++){
             if(proc_list[i].state == READY){
                 
-                kprintf("Hell yeah");
-                
                 context old_state = state->current_process->context;
 
                 state->current_process = &proc_list[i];
                 state->current_process->state = RUNNING;
 
+                get_context(&state->scheduler_context);
                 switch_context(&old_state, &state->current_process->context);
-
             }
         }
     }
@@ -112,8 +110,6 @@ void scheduler_init(){
 void scheduler_tick(){
     cpu_state *state = get_cpu_struct();
     proc *proc_list = state->process_list;
-
     switch_context(&state->current_process->context, &state->scheduler_context);
 
-
 }

src/sys/acpi.c

@@ -1,7 +1,7 @@
 #include <limine.h>
 #include <stddef.h>
 #include <kprint.h>
-#include <SFB25.h>
+#include <neobbo.h>
 #include <string.h>
 #include <stdalign.h>
 #include "acpi.h"

src/sys/pci.c

@@ -1,4 +1,4 @@
-#include <SFB25.h>
+#include <neobbo.h>
 #include <kprint.h>
 #include <string.h>
 #include <lock.h>

src/uacpi_kernel_api.c

@@ -4,7 +4,7 @@
 #include "mm/kmalloc.h"
 #include <limine.h>
 #include <kprint.h>
-#include <SFB25.h>
+#include <neobbo.h>
 #include <io.h>
 
 uacpi_status uacpi_kernel_get_rsdp(uacpi_phys_addr *out_rsdp_address){