syscalls: exit

src/arch/x86_64/syscall.asm

@@ -16,7 +16,8 @@ extern syscall_fstat
 extern syscall_fork
 extern syscall_execve
 extern syscall_waitpid
-func_count equ 15
+extern syscall_exit
+func_count equ 16
 
 
 func_table:
@@ -35,6 +36,7 @@ func_table:
 	dq syscall_fork
 	dq syscall_execve
 	dq syscall_waitpid
+	dq syscall_exit
 section .text
 global asm_syscall_entry
 

src/sys/syscalls/exit.c

@@ -0,0 +1,55 @@
+#include <kernel/sched.h>
+#include <arch/cls.h>
+#include <arch/spinlock.h>
+#include <stdbool.h>
+#include <kernel/event.h>
+#include <kernel/alloc.h>
+
+void syscall_exit(int status){
+	proc_t* proc = arch_getcls()->thread->proc;
+
+	spinlock_acquire(&proc->lock);
+	
+	// TODO make all other threads exit
+
+	free(proc->threads);
+
+	for(uintmax_t fd = 0; fd < proc->fdtable.fdcount; ++ fd)
+		fd_free(&proc->fdtable, fd);
+	
+
+
+	proc->state = PROC_STATE_ZOMBIE;
+	proc->status = status;
+
+	vfs_close(proc->root);	
+	vfs_close(proc->cwd);	
+
+	proc_t* init = sched_getinit();
+
+	spinlock_acquire(&init->lock);
+
+	proc_t* child = proc->child;
+	proc_t* firstchild = child;
+
+	while(child){
+		spinlock_acquire(&child->lock);
+		child->parent = init;	
+		if(!child->sibling){
+			child->sibling = init->child;
+			init->child = firstchild;
+		}
+		spinlock_release(&child->lock);
+		child = child->sibling;
+	}	
+
+	spinlock_release(&init->lock);
+	spinlock_release(&proc->lock);
+
+	event_signal(&proc->parent->childevent, true);
+
+	sched_dequeue();
+	
+	__builtin_unreachable();
+
+}