Scheduler fix, User RR

src/arch/x86/syscall.c

@@ -9,6 +9,9 @@
 #include <kernel.h>
 #include <stddef.h>
 #include <io/term/term.h>
+#include <sched/process.h>
+
+extern struct process* current_process;
 
 void sys_write(unsigned int fd, const char* buf, size_t count)
 {
@@ -20,10 +23,19 @@ void sys_write(unsigned int fd, const char* buf, size_t count)
             break;
 
         case 2: //stderr
+            for (size_t i=0; i<count; i++) {
+                internal_putc(buf[i], NULL);
+            }
             break;
     }
 }
 
+void sys_exit(int error_code)
+{
+    current_process->status = DEAD;
+    DEBUG("exiting process PID=%u name=%s", current_process->pid, current_process->name);
+}
+
 /*
  * syscall_handler - System call dispatcher
  * @regs: CPU state
@@ -53,6 +65,9 @@ struct cpu_status* syscall_handler(struct cpu_status* regs)
         case 1: //sys_write
             sys_write(regs->rdi, (char*)regs->rsi, regs->rdx);
             break;
+        case 60: //sys_exit
+            sys_exit(regs->rdi);
+            break;
         default:
             regs->rax = 0xbad515ca11;
             break;