From f466364b8a3858e7b3f19258d142851cb4a7e6d6 Mon Sep 17 00:00:00 2001
From: Jon Santmyer <jon@jonsantmyer.com>
Date: Mon, 11 Aug 2025 19:04:26 -0400
Subject: remove _initData, replace with enum indexes

---
 arch/x86_64/usermode.c | 28 ++++++++--------------------
 1 file changed, 8 insertions(+), 20 deletions(-)

(limited to 'arch/x86_64/usermode.c')

diff --git a/arch/x86_64/usermode.c b/arch/x86_64/usermode.c
index 66a641c..68cb45a 100644
--- a/arch/x86_64/usermode.c
+++ b/arch/x86_64/usermode.c
@@ -15,7 +15,7 @@ static uintptr_t
 s_new_mapping(objdir_t *untyped_dir)
 {
     objdir_entry_t *untyped_entry = NULL;
-    for(int i = 1; i < OBJECT_DIRECTORY_MAX_ENTRIES; i++) {
+    for(int i = untyped_dir->self.data - 1; i != 0; i--) {
         untyped_entry = &untyped_dir->entries[i];
         if(untyped_entry->type != KO_MEMORY_UNTYPED) continue;
         uintptr_t mapping = 0;
@@ -23,7 +23,7 @@ s_new_mapping(objdir_t *untyped_dir)
         if(err != 0) continue;
         return mapping;
     }
-    return 0;
+    kpanic("Could not allocate page for init\n");
 }
 
 static pmle_t*
@@ -97,22 +97,13 @@ init_load(void)
         kpanic("Init file not found in initrd. (expected \"%s\")", init_filename);
     }
 
-    size_t tcb_diri = _initDirectory.self.data++;
-    size_t message_diri = _initDirectory.self.data++;
-
-    _initData.tcb_object = tcb_diri;
-    _initData.message_object = message_diri;
-
-    _initDirectory.entries[tcb_diri] = (objdir_entry_t) {
+    _initDirectory.entries[INIT_OBJECT_TCB] = (objdir_entry_t) {
         .type = KO_TCB,
         .data = (uintptr_t)&s_init_tcb
     };
 
-    size_t untyped_diri = _initData.untyped_data_dir;
-    objdir_t *untyped_dir = (objdir_t*)_initDirectory.entries[untyped_diri].data;
-
-    size_t pml4_diri = _initData.pm_object;
-    pmle_t *pml4 = vmem_phys_tovirt(_initDirectory.entries[pml4_diri].data & ~3ULL);
+    objdir_t *untyped_dir = (objdir_t*)_initDirectory.entries[INIT_OBJECT_UNTYPED_DIR].data;
+    pmle_t *pml4 = vmem_phys_tovirt(_initDirectory.entries[INIT_OBJECT_PAGEMAP].data & ~3ULL);
 
     //Reserve and map pages for init binary
     size_t init_size = initrd_file_size(init_header);
@@ -143,17 +134,14 @@ init_load(void)
     message_base += ((~(message_base & 0xFFF)) & 0xFFF) + 1;
 
     uintptr_t message_phys = s_map_page(pml4, untyped_dir, message_base);
-    _initDirectory.entries[message_diri] = (objdir_entry_t) {
+    _initDirectory.entries[INIT_OBJECT_MESSAGE] = (objdir_entry_t) {
         .type = KO_MESSAGE,
         .data = (uintptr_t)vmem_phys_tovirt(message_phys)
     };
-    _initData.message_object_address = message_base;
 
-    //Write init data to user stack.
-    sp -= sizeof(init_data_t);
-    memcpy((void*)sp, &_initData, sizeof(init_data_t));
+    //Write message address to user stack.
     sp -= sizeof(uintptr_t);
-    *((uintptr_t*)sp) = sp + sizeof(uintptr_t);
+    *((uintptr_t*)sp) = message_base;
 
     //Setup usermode and jump
     proc->tcb = &s_init_tcb;
-- 
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