From 44f9642bfc9ce9f740d508670befb569e06621a2 Mon Sep 17 00:00:00 2001
From: Jon Santmyer <jon@jonsantmyer.com>
Date: Mon, 19 Oct 2026 11:06:32 -0400
Subject: add debug console. start work on userland pagedir manipulation tools

---
 api/init.h    |  1 -
 api/memory.h  | 28 ++++++++++++++++++++++++++++
 api/syscall.h | 21 +++++++++++++++------
 3 files changed, 43 insertions(+), 7 deletions(-)
 create mode 100644 api/memory.h

(limited to 'api')

diff --git a/api/init.h b/api/init.h
index 107ebef..1d6cf4b 100644
--- a/api/init.h
+++ b/api/init.h
@@ -12,7 +12,6 @@ enum {
     INIT_ROOTDIR_HWMEMORY_I,
     INIT_ROOTDIR_MODULES_I,
     INIT_ROOTDIR_INTERRUPTS_I,
-    INIT_ROOTDIR_INITRD_I,
     INIT_ROOTDIR_MESSAGE_I,
     _INIT_ROOTDIR_LAST_I
 };
diff --git a/api/memory.h b/api/memory.h
new file mode 100644
index 0000000..d4096e2
--- /dev/null
+++ b/api/memory.h
@@ -0,0 +1,28 @@
+#ifndef _JOVE_API_MEMORY_H
+#define _JOVE_API_MEMORY_H 1
+
+#include <stdbool.h>
+#include <stdint.h>
+
+#define JOVE_USERMEMORY_LIMIT 0x00007FFFFFFFFFFFULL
+
+typedef uintptr_t virtaddr_t;
+typedef uintptr_t physaddr_t;
+
+typedef virtaddr_t virt_frame_t;
+typedef physaddr_t phys_frame_t;
+
+struct pagedir_mapping_flags
+{
+    bool present;
+    bool writeable;
+    bool executable;
+};
+
+struct pagedir_mapping
+{
+    phys_frame_t pfn;
+    struct pagedir_mapping_flags flags;
+};
+
+#endif
diff --git a/api/syscall.h b/api/syscall.h
index 4a5d3e4..a52fa5e 100644
--- a/api/syscall.h
+++ b/api/syscall.h
@@ -3,9 +3,11 @@
 
 #include <stddef.h>
 #include <stdint.h>
+#include <stdbool.h>
 
 #include "process.h"
 #include "obj.h"
+#include "memory.h"
 
 /* General syscall behavior:
  * If the message passed is not a JOVE_OBJ_MESSAGE type, the kernel will return EBADOBJ.
@@ -106,6 +108,8 @@ struct syscall_objdir_link
 enum
 {
     _SYSCALL_PAGEDIR_NONE = 0,
+    SYSCALL_PAGEDIR_GET_MAPPING,
+    SYSCALL_PAGEDIR_TRANSFER,
     SYSCALL_PAGEDIR_MAP_FRAME,
     SYSCALL_PAGEDIR_MAP_TABLE,
     SYSCALL_PAGEDIR_MAP_SHMEM,
@@ -114,6 +118,8 @@ enum
     SYSCALL_PAGEDIR_UNMAP_SHMEM,
 };
 
+#define SYSCALL_PERM_PAGEDIR_GET_MAPPING (JOVE_PERM_READ)
+#define SYSCALL_PERM_PAGEDIR_TRANSFER (JOVE_PERM_READ | JOVE_PERM_WRITE)
 #define SYSCALL_PERM_PAGEDIR_MAP_FRAME (JOVE_PERM_READ | JOVE_PERM_WRITE)
 #define SYSCALL_PERM_PAGEDIR_MAP_TABLE (JOVE_PERM_READ | JOVE_PERM_WRITE)
 #define SYSCALL_PERM_PAGEDIR_MAP_SHMEM (JOVE_PERM_READ | JOVE_PERM_WRITE)
@@ -121,17 +127,20 @@ enum
 #define SYSCALL_PERM_PAGEDIR_UNMAP_TABLE (JOVE_PERM_READ | JOVE_PERM_WRITE)
 #define SYSCALL_PERM_PAGEDIR_UNMAP_SHMEM (JOVE_PERM_READ | JOVE_PERM_WRITE)
 
-struct syscall_pagedir_flags
+#define SYSCALL_PERM_PAGEDIR_TRANSFER_TGT (SYSCALL_PERM_PAGEDIR_TRANSFER)
+
+struct syscall_pagedir_transfer
 {
-    uint8_t writeable : 1;
-    uint8_t executable : 1;
-    uint8_t flg_unused : 6;
+    virtaddr_t subject_address;
+    virtaddr_t target_address;
+    objpath_part_t target_path_length;
+    objpath_part_t target_path[];
 };
 
 struct syscall_pagedir_map
 {
     uintptr_t virtual_address;
-    struct syscall_pagedir_flags page_flags;
+    struct pagedir_mapping_flags flags;
     objpath_part_t untyped_pathlen;
     objpath_part_t untyped_path[];
 };
@@ -140,7 +149,7 @@ struct syscall_pagedir_map_shmem
 {
     uintptr_t virtual_address;
     unsigned short page_offset;
-    struct syscall_pagedir_flags page_flags;
+    struct pagedir_mapping_flags flags;
     objpath_part_t shmem_pathlen;
     objpath_part_t shmem_path[];
 };
-- 
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