add pcb stop syscall and scheduler dequeueingHEADmain

1 files changed, 45 insertions, 0 deletions

diff --git a/sys/syscall_pcb.c b/sys/syscall_pcb.c
index 7a6d4e3..19699ce 100644
--- a/sys/syscall_pcb.c
+++ b/sys/syscall_pcb.c
@@ -5,6 +5,7 @@
 #include "lib/printf.h"
 #include "proc/process.h"
 #include "proc/scheduler.h"
+#include "sys/objdir.h"
 #include "syscall.h"
 
 int
@@ -242,6 +243,40 @@ s_syscall_pcb_stack(jove_owned_obj_t *pcb_obj,
     return 0;
 }
 
+int s_syscall_pcb_ready(
+    jove_owned_obj_t *target_obj,
+    lockstack_t *lockstack,
+    jove_obj_t *objdir)
+{
+    jove_objdir_t *target_objdir = obj_getobjdir(obj_asunowned(target_obj));
+    if(!obj_compare(&target_objdir->entries[PCB_ROOTDIR_SELF_I], obj_asunowned(target_obj))) {
+        klogf("Target PCB is not in entry %i of it's objdir!\n", PCB_ROOTDIR_SELF_I);
+        return -EBADPATH;
+    }
+
+    jove_owned_obj_t *pagedir_obj = obj_take(&target_objdir->entries[PCB_ROOTDIR_PAGEDIR_I]);
+    if(obj_gettype(pagedir_obj) != JOVE_OBJ_PAGEDIR) {
+        klogf("Target PCB rootdir does not have pagedir in entry %i\n", PCB_ROOTDIR_PAGEDIR_I);
+        obj_release(pagedir_obj);
+        return -EBADPATH;
+    }
+    
+    obj_release(pagedir_obj);
+    return 0;
+}
+
+int
+s_syscall_pcb_stop(jove_owned_obj_t *pcb_obj,
+                   size_t bytes_left,
+                   void *payload_data)
+{
+    size_t bytes_needed = sizeof(int);
+    CHECK_TOOSMALL(bytes_needed, bytes_left, "Message too small for payload");
+
+    int stop_code = *((int*)payload_data);
+    return scheduler_stop(pcb_obj, stop_code);
+}
+
 int
 _syscall_handle_pcb(syscall_context_t *ctx)
 {
@@ -275,6 +310,16 @@ _syscall_handle_pcb(syscall_context_t *ctx)
                     ctx->target.obj, &ctx->lockstack, ctx->objdir, ctx->bytes_left, ctx->payload);
             return -EPERM;
 
+        case SYSCALL_PCB_READY:
+            if(ctx->target.permissions & SYSCALL_PERM_PCB_READY)
+                return s_syscall_pcb_ready(
+                    ctx->target.obj, &ctx->lockstack, ctx->objdir);
+            return -EPERM;
+        case SYSCALL_PCB_STOP:
+            if(ctx->target.permissions & SYSCALL_PERM_PCB_STOP)
+                return s_syscall_pcb_stop(
+                    ctx->target.obj, ctx->bytes_left, ctx->payload);
+
         default:
             return -EBADCALL;
     }