Pridana verze v0.1

kernel/syscall.c

@@ -0,0 +1,58 @@
+/*
+ * AsterOS Kernel
+ * Autor: Pavel Kalaš
+ * Rok: 2026
+ *
+ */
+
+/*
+ * Tento modul je vstupni brana pro systemova volani.
+ * Obsahuje dispatcher, ktery podle ID vola konkretni kernelovou sluzbu,
+ * a implementuje zakladni syscall operace pro zapis, alokaci a procesy.
+ */
+
+#include "memory.h"
+#include "printk.h"
+#include "process.h"
+#include "syscall.h"
+
+void syscall_init(void) {
+}
+
+u64 syscall_dispatch(u64 id, u64 a1, u64 a2, u64 a3, u64 a4) {
+    (void)a3;
+    (void)a4;
+
+    switch (id) {
+        case SYSCALL_WRITE:
+            return aster_write((const char *)a1);
+        case SYSCALL_ALLOC:
+            return (u64)aster_alloc((usize)a1);
+        case SYSCALL_PROCESS_CREATE:
+            return (u64)aster_process_create((void (*)(void))a1, (const char *)a2, (u8)a3);
+        default:
+            return (u64)-1;
+    }
+}
+
+u64 aster_write(const char *text) {
+    if (!text) {
+        return (u64)-1;
+    }
+
+    printk("%s", text);
+    return 0;
+}
+
+void *aster_alloc(usize size) {
+    return kmalloc(size);
+}
+
+i64 aster_process_create(void (*entry)(void), const char *name, u8 priority) {
+    process_t *p = process_create(name, entry, priority);
+    if (!p) {
+        return -1;
+    }
+
+    return p->pid;
+}