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

---
 arch/x86_64/hal/paging.c     | 18 ++++++++++++++----
 arch/x86_64/hal/serial_com.c | 16 ++++++++--------
 arch/x86_64/hal/serial_com.h |  3 +++
 3 files changed, 25 insertions(+), 12 deletions(-)

(limited to 'arch/x86_64/hal')

diff --git a/arch/x86_64/hal/paging.c b/arch/x86_64/hal/paging.c
index d5bcee3..35d39e2 100644
--- a/arch/x86_64/hal/paging.c
+++ b/arch/x86_64/hal/paging.c
@@ -162,6 +162,16 @@ inline bool pagedir_mapping_is_present(virtaddr_t *mapping)
     return ((page_t*)mapping)->p;
 }
 
+inline bool pagedir_mapping_is_writeable(virtaddr_t *mapping)
+{
+    return ((page_t*)mapping)->rw;
+}
+
+inline bool pagedir_mapping_is_executable(virtaddr_t *mapping)
+{
+    return ((page_t*)mapping)->xd;
+}
+
 inline void pagedir_mapping_set_pfn(virtaddr_t *mapping, size_t pfn)
 {
     ((page_t*)mapping)->pfn = pfn;
@@ -205,7 +215,7 @@ int pagedir_map_frame(page_t *pml4,
 
 int pagedir_map_frame_type(page_t *pml4,
         uintptr_t pptr, uintptr_t vptr,
-        struct syscall_pagedir_flags flg, int type)
+        struct pagedir_mapping_flags flg, int type)
 {
     uintmax_t real_flg = PAGE_USER | (type << PAGE_SHL_TYPE);
     if(flg.writeable) {
@@ -219,7 +229,7 @@ int pagedir_map_frame_type(page_t *pml4,
 
 int pagedir_map_untyped_frame(
         jove_owned_obj_t *tgt, jove_perm_obj_t *untyped, 
-        uintptr_t vptr, struct syscall_pagedir_flags flg)
+        uintptr_t vptr, struct pagedir_mapping_flags flg)
 {
     page_t *pml4 = obj_deref(tgt);
 
@@ -260,7 +270,7 @@ int pagedir_map_table(page_t *pml4,
         target_table = &pml2[pml2i];
         goto map_table;
     }
-    return EHASMAP;
+    return -EHASMAP;
 
 map_table:
     memset(frame_ident, 0, 0x1000);
@@ -288,7 +298,7 @@ int pagedir_map_untyped_table(
 
 int pagedir_map_shmem_frame(
         jove_owned_obj_t *tgt, jove_perm_obj_t *shmem, uint8_t page_offset,
-        uintptr_t vptr, struct syscall_pagedir_flags flg)
+        uintptr_t vptr, struct pagedir_mapping_flags flg)
 {
     page_t *pml4 = obj_deref(tgt);
 
diff --git a/arch/x86_64/hal/serial_com.c b/arch/x86_64/hal/serial_com.c
index c571057..ec39d21 100644
--- a/arch/x86_64/hal/serial_com.c
+++ b/arch/x86_64/hal/serial_com.c
@@ -10,26 +10,26 @@ serial_com_recv(uint16_t port)
     return inb(SERIAL_COM_LSR(port)) & 1;
 }
 
-static char
-serial_com_getc(uint16_t port)
-{
-    while(serial_com_recv(port) == 0);
-    return inb(port);
-}
-
 static int
 serial_com_put_ready(uint16_t port)
 {
     return inb(SERIAL_COM_LSR(port)) & 0x20;
 }
 
-static void 
+void 
 serial_com_putc(uint16_t port, char c)
 {
     while(serial_com_put_ready(port) == 0);
     outb(port, c);
 }
 
+char
+serial_com_getc(uint16_t port)
+{
+    while(serial_com_recv(port) == 0);
+    return inb(port);
+}
+
 int
 serial_com_init_port(
         uint16_t port,
diff --git a/arch/x86_64/hal/serial_com.h b/arch/x86_64/hal/serial_com.h
index cf0badc..3850a7b 100644
--- a/arch/x86_64/hal/serial_com.h
+++ b/arch/x86_64/hal/serial_com.h
@@ -23,6 +23,9 @@
 
 void serial_com_init(void);
 
+char serial_com_getc(uint16_t port);
+void serial_com_putc(uint16_t port, char c);
+
 int serial_com_write(uint16_t port, const char *s, size_t len);
 
 #endif
-- 
cgit v1.2.3