add syscall for vtt_write

3 files changed, 67 insertions, 32 deletions

diff --git a/sys/syscall.c b/sys/syscall.c
index 1eadf50..6c3fa33 100644
--- a/sys/syscall.c
+++ b/sys/syscall.c
@@ -31,7 +31,7 @@ static const syscall_handle_t s_syscall_handles[128] = {
     [JOVE_OBJ_PAGEFRAME] = _syscall_handle_generic,
     [JOVE_OBJ_INITRD_FILE] = _syscall_handle_generic,
     [JOVE_OBJ_FRAMEBUFFER] = _syscall_handle_generic,
-    [JOVE_OBJ_VIRTTERM] = _syscall_handle_generic,
+    [JOVE_OBJ_VIRTTERM] = _syscall_handle_vtt,
     [JOVE_OBJ_MESSAGE] = _syscall_handle_generic,
 };
 
@@ -47,7 +47,6 @@ syscall_handler(uintmax_t message_path_raw, uint16_t message_pathlen)
     pcb_t *pcb = obj_deref(pcb_obj);
 
     jove_owned_obj_t *objdir = pcb_rootdir(pcb);
-    kprintf("Syscall: %p : %P \n", objdir, message_path, message_pathlen);
 
     jove_owned_obj_t *message_obj = objdir_getobj(objdir, message_path, message_pathlen);
     if(message_obj == 0) {
@@ -73,7 +72,6 @@ syscall_handler(uintmax_t message_path_raw, uint16_t message_pathlen)
 
     size_t header_bytes = sizeof(struct syscall_header) + header->pathlen * 2;
     int bytes_left = messagelen - header_bytes;
-    kprintf("syscall: Payload %p len %i\n", messagedata, header->pathlen);
     if(bytes_left < 0) {
         //Target path exceeds message length.
         kprintf("syscall: Process %i tried to call syscall with OOB target path.\n", pcb_pid(pcb));
@@ -92,7 +90,8 @@ syscall_handler(uintmax_t message_path_raw, uint16_t message_pathlen)
 
     uint8_t target_type = obj_gettype(target);
     if(target_type > 0x7F) {
-        sysret = syscall_handle_arch(pcb_obj, objdir, message_obj, target,
+        sysret = _syscall_handle_arch(
+                pcb_obj, objdir, message_obj, target,
                 header, bytes_left, messagedata + header_bytes);
     }else{
         syscall_handle_t call_handle = s_syscall_handles[obj_gettype(target)];
@@ -101,8 +100,9 @@ syscall_handler(uintmax_t message_path_raw, uint16_t message_pathlen)
                     pcb_pid(pcb), header->path, header->pathlen);
             sysret = EBADOBJ;
         }else 
-            sysret = call_handle(pcb_obj, objdir, message_obj, target, 
-                header, bytes_left, message_data + header_bytes);
+            sysret = call_handle(
+                    pcb_obj, objdir, message_obj, target, 
+                    header, bytes_left, messagedata + header_bytes);
     }
 
     obj_release(target);
diff --git a/sys/syscall.h b/sys/syscall.h
index efd3f64..6ad221f 100644
--- a/sys/syscall.h
+++ b/sys/syscall.h
@@ -11,33 +11,26 @@ struct syscall_header
     uint16_t path[];
 };
 
-typedef int (*syscall_handle_t)(
-        jove_owned_obj_t*, //PCB object
-        jove_owned_obj_t*, //Objdir object
-        jove_owned_obj_t*, //Message object
-        jove_owned_obj_t*, //Target object
-        struct syscall_header*, //Syscall header
-        size_t, //How many bytes are left in the message
-        void*); //The bytes left in the message.
+#define SYSCALL_FUNCTION_ARGS \
+        jove_owned_obj_t*, /*PCB object*/ \
+        jove_owned_obj_t*, /*Objdir object*/ \
+        jove_owned_obj_t*, /*Message object*/ \
+        jove_owned_obj_t*, /*Target object*/ \
+        struct syscall_header*, /*Syscall header*/ \
+        size_t, /*How many bytes are left in the message*/ \
+        void* /*The bytes left in the message.*/
 
-int
-_syscall_handle_generic(
-        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);
+typedef int (*syscall_handle_t)(SYSCALL_FUNCTION_ARGS);
 
-int
-syscall_handle_arch(
-        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);
+int _syscall_handle_generic(SYSCALL_FUNCTION_ARGS);
+int _syscall_handle_arch(SYSCALL_FUNCTION_ARGS);
+
+#define SYSCALL_VTT_WRITE 0
+struct syscall_vtt_write
+{
+    size_t len;
+    char data[];
+};
+int _syscall_handle_vtt(SYSCALL_FUNCTION_ARGS);
 
 #endif
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;
+    }
+}