From b905869a35f062a4e5072f10bec3a2ba3db0e365 Mon Sep 17 00:00:00 2001
From: Jon Santmyer <jon@jonsantmyer.com>
Date: Wed, 30 Jul 2025 14:32:01 -0400
Subject: working userland with some invoke syscalls

---
 syscall/handler.c | 66 +++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 66 insertions(+)
 create mode 100644 syscall/handler.c

(limited to 'syscall/handler.c')

diff --git a/syscall/handler.c b/syscall/handler.c
new file mode 100644
index 0000000..efab179
--- /dev/null
+++ b/syscall/handler.c
@@ -0,0 +1,66 @@
+#include "syscall.h"
+#include "object.h"
+#include "handles.h"
+#include "device/processor.h"
+#include "print.h"
+#include <stdint.h>
+#include <stddef.h>
+
+static int
+s_syscall_handle_invoke(objdir_t *root_dir, void *payload)
+{
+    struct syscallInvokeHeader *invokeHeader = payload;
+    uintmax_t target_path = invokeHeader->target_path;
+    objdir_entry_t *target_entry = objdir_seek(root_dir, target_path);
+    
+    klogf("target entry %x:%p func %i\n", target_path, target_entry->data, invokeHeader->func_id);
+
+    if(target_entry == NULL) return -1;
+    switch(target_entry->type) {
+        case KO_NONE:
+            return -1;
+        case KO_OBJECT_DIRECTORY:
+            return syscall_handle_invoke_objdir(root_dir, (objdir_t*)target_entry->data, payload);
+        default:
+            klogf("Missing implementation of invoke for type %i\n", target_entry->type);
+            return -1;
+    }
+}
+
+int
+_syscall_handler(uintmax_t argsi, int calli)
+{
+    objdir_t *objdir = ((processor_t*)processor_current())->odir;
+    objdir_entry_t *payload_entry = objdir_seek(objdir, argsi);
+    if(payload_entry == NULL) {
+        klogf("Missing object for syscall %i (%x)\n", calli, argsi);
+        return -1;
+    }
+    if(payload_entry->type != KO_MESSAGE) {
+        klogf("Tried to invoke syscall %i with invalid object %x\n", calli, argsi);
+        return -1;
+    }
+
+    uintmax_t *payload = (void*)payload_entry->data;
+
+    switch(calli) {
+        case SYSCALL_INVOKE: return s_syscall_handle_invoke(objdir, payload);
+        case SYSCALL_DEBUG_PUTC:
+            kprintf("%c", (char)payload[0]);
+            return 0;
+        case SYSCALL_DEBUG_IDENTIFY: 
+        {
+            objdir_entry_t *target_entry = objdir_seek(objdir, payload[0]);
+            if(payload_entry == NULL) {
+                payload[0] = KO_NONE;
+            } else {
+                payload[0] = target_entry->type;
+            }
+            return 0;
+        }
+        default:
+            klogf("Invalid syscall %i caught! Failing.\n", calli);
+            return -1;
+    }
+    return -1;
+}
-- 
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