From 42a2bdaecaee627247689b3f4ff2828fe3c8dc97 Mon Sep 17 00:00:00 2001
From: Jon Santmyer <jon@jonsantmyer.com>
Date: Thu, 11 Sep 2025 14:37:04 -0400
Subject: load init from ELF executable

---
 include/arch/x86_64/init.h | 12 ++++++++++++
 include/arch/x86_64/tcb.h  | 10 ++++++++--
 include/device/processor.h |  6 +++---
 include/elf.h              |  6 +++---
 include/init.h             |  3 ---
 include/memory.h           |  2 --
 include/tcb.h              |  2 ++
 7 files changed, 28 insertions(+), 13 deletions(-)
 create mode 100644 include/arch/x86_64/init.h

(limited to 'include')

diff --git a/include/arch/x86_64/init.h b/include/arch/x86_64/init.h
new file mode 100644
index 0000000..d8fdf2c
--- /dev/null
+++ b/include/arch/x86_64/init.h
@@ -0,0 +1,12 @@
+#ifndef _JOVE_x86_64_INIT_H
+#define _JOVE_x86_64_INIT_H 1
+
+#include <stdint.h>
+
+uintptr_t init_alloc_pageframe();
+void init_map_pageframe(uintptr_t pptr, uintptr_t vptr, uint8_t pflags);
+
+__attribute__((noreturn))
+void usermode(void *ip, void *sp);
+
+#endif
diff --git a/include/arch/x86_64/tcb.h b/include/arch/x86_64/tcb.h
index 33da4fa..ae93bdf 100644
--- a/include/arch/x86_64/tcb.h
+++ b/include/arch/x86_64/tcb.h
@@ -2,17 +2,23 @@
 #define _JOVE_x86_64_TCB_H 1
 
 #include <stdint.h>
+#include <stddef.h>
+
+#define KERNEL_STACK_MINSIZE 0x1000
 
 typedef struct jove_ThreadControlBlock
 {
-    void *stack;
+    size_t size;
+    struct jove_ThreadControlBlock *tcb_next, *sched_next;
+    uint8_t priority;
+
     uintptr_t sp, ksp;
     void *pml4;
     void *mailbox;
 
     /* PML caching for faster calls?*/
 
-    uint8_t kstack[KERNEL_STACKBYTES];
+    uint8_t kstack[];
 } tcb_t;
 
 #endif
diff --git a/include/device/processor.h b/include/device/processor.h
index 33deed4..e0ec16c 100644
--- a/include/device/processor.h
+++ b/include/device/processor.h
@@ -1,9 +1,7 @@
 #ifndef _JOVE_DEVICE_PROCESSOR_H
 #define _JOVE_DEVICE_PROCESSOR_H 1
 
-#if defined(__x86_64__)
-#include "arch/x86_64/processor.h"
-#endif
+#include "object.h"
 
 /**@FUNC Initialize the bootstrap processor.*/
 void bsp_setup(void);
@@ -19,4 +17,6 @@ void processor_setup(void* processor);
  * @RET pointer to current processor.*/
 void *processor_current(void);
 
+objdir_t *processor_get_objdir(void *processor);
+
 #endif
diff --git a/include/elf.h b/include/elf.h
index 05e3e83..acd0aea 100644
--- a/include/elf.h
+++ b/include/elf.h
@@ -89,9 +89,9 @@ typedef struct {
 #define PT_NULL 0
 #define PT_LOAD 1
 
-#define PF_X 1
-#define PF_W 2
-#define PF_R 4
+#define PF_X 0x1
+#define PF_W 0x2
+#define PF_R 0x4
 
 typedef struct
 {
diff --git a/include/init.h b/include/init.h
index 2174785..fc1361d 100644
--- a/include/init.h
+++ b/include/init.h
@@ -17,9 +17,6 @@ enum {
 #include "object.h"
 extern objdir_t _initDirectory;
 
-uintptr_t init_alloc_pageframe();
-void init_map_pageframe(uintptr_t pptr, uintptr_t vptr, uint8_t pflags);
-
 void init_load(void);
 
 #endif
diff --git a/include/memory.h b/include/memory.h
index 901060c..3e97bcf 100644
--- a/include/memory.h
+++ b/include/memory.h
@@ -7,8 +7,6 @@
 typedef uintptr_t physptr_t;
 typedef uintptr_t virtptr_t;
 
-#define KERNEL_STACK_SIZE 0x1000
-
 void mapping_setup_init(void);
 void mapping_setup(objdir_entry_t *mapping);
 
diff --git a/include/tcb.h b/include/tcb.h
index c28a860..511f69e 100644
--- a/include/tcb.h
+++ b/include/tcb.h
@@ -4,6 +4,8 @@
 #include <stddef.h>
 #include <stdint.h>
 
+struct jove_ThreadControlBlock;
 
+void tcb_init(void *task_main);
 
 #endif
-- 
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