add syscall for vtt_write

1 files changed, 42 insertions, 0 deletions

diff --git a/sys/syscall_vtt.c b/sys/syscall_vtt.c
new file mode 100644
index 0000000..4b58b2c
--- /dev/null
+++ b/sys/syscall_vtt.c
@@ -0,0 +1,42 @@
+#include "jove.h"
+#include "lib/printf.h"
+#include "lib/virtterm.h"
+#include "syscall.h"
+
+static int
+s_syscall_vtt_write(
+        jove_owned_obj_t *vtt,
+        size_t payload_bytes,
+        void *payload_data)
+{
+    if(payload_bytes < sizeof(struct syscall_vtt_write)) {
+        kprintf("syscall_vtt_write: message is too small for this syscall!\n");
+        return EOOB;
+    }
+    struct syscall_vtt_write *payload = payload_data;
+    if(payload_bytes < sizeof(struct syscall_vtt_write) + payload->len) {
+        kprintf("syscall_vtt_write: message is to small for payload! (%i vs %i)\n",
+                payload->len, payload_bytes);
+        return EOOB;
+    }
+    return vt_write(vtt, payload->data, payload->len);
+}
+
+int
+_syscall_handle_vtt(
+        jove_owned_obj_t *pcb_obj,
+        jove_owned_obj_t *objdir,
+        jove_owned_obj_t *message_obj,
+        jove_owned_obj_t *target_obj,
+        struct syscall_header *header,
+        size_t bytes_left,
+        void *payload_data)
+{
+    switch(header->callid) {
+        case 0:
+            return s_syscall_vtt_write(target_obj, bytes_left, payload_data);
+        default:
+            kprintf("syscall_vtt: vtt object does not support syscall %i\n", header->callid);
+            return EOOB;
+    }
+}