From 3bbc916ffd9c0d093a39c2ddb01662cdb7a127a1 Mon Sep 17 00:00:00 2001
From: RaphProductions <81994075+RaphProductions@users.noreply.github.com>
Date: Sun, 11 May 2025 18:37:15 +0200
Subject: [PATCH] kernel: Prepare for v0.1-pre

---
 README.md                               |  11 ++++++++---
 kernel/src/mm/vmm.c                     |  15 ---------------
 kernel/src/sys/arch/x86_64/interrupts.c |   1 +
 testing/sk-hello.elf                    | Bin 4328 -> 4320 bytes
 testing/test.asm                        |   9 ++-------
 testing/test.o                          | Bin 608 -> 608 bytes
 6 files changed, 11 insertions(+), 25 deletions(-)

diff --git a/README.md b/README.md
index 6928242..73f84a3 100755
--- a/README.md
+++ b/README.md
@@ -6,13 +6,18 @@ The Soaplin kernel is a new Unix-like operating system kernel.
 * Memory management (VMM/PMM)
 * Simple pre-emptive scheduler
 * Ring 3 (user mode) support
+* ELF loader
+
+## In the works
+* Virtual File System
+* FPU support
 
 ## To come
 * RTC support
-* ELF loader
-* Virtual File System
 * EXT2 driver 
 * FAT32 driver
 * CPIO-based init ram disk
 * Video driver for Bochs graphics adapter, and the VMware display adapter.
-* FPU support
+
+## Known bugs
+* If a user process calls the syscall handler by using interrupts, the system may crash due to a Page Fault.
\ No newline at end of file
diff --git a/kernel/src/mm/vmm.c b/kernel/src/mm/vmm.c
index f12dd47..e2a183f 100644
--- a/kernel/src/mm/vmm.c
+++ b/kernel/src/mm/vmm.c
@@ -29,21 +29,6 @@ pagemap_t *vmm_alloc_pm() {
   pagemap_t *pm = (pagemap_t *)HIGHER_HALF((uint64_t)pmm_request_page());
   memset(pm, 0, PMM_PAGE_SIZE);
 
-  /*if (vmm_kernel_pm_exists) {
-      pm->toplevel = (uint64_t*)HIGHER_HALF((uint64_t)pmm_request_page());
-      memset(pm->toplevel, 0, PMM_PAGE_SIZE);
-
-      for (int i = 256; i < 512; i++) {
-          pm->toplevel[i] = vmm_kernel_pm->toplevel[i];
-      }
-  } else {
-
-  __asm__ volatile("mov %%cr3, %0" : "=r"(pm->toplevel) : : "memory");
-  pm->toplevel = HIGHER_HALF(pm->toplevel);
-  logln(info, "vmm", "Limine-provided kernel PML4: %p", pm->toplevel);
-
-  }*/
-
   pm->toplevel = (uint64_t *)HIGHER_HALF((uint64_t)pmm_request_page());
   memset(pm->toplevel, 0, PMM_PAGE_SIZE);
 
diff --git a/kernel/src/sys/arch/x86_64/interrupts.c b/kernel/src/sys/arch/x86_64/interrupts.c
index bbec1c2..8e3643c 100644
--- a/kernel/src/sys/arch/x86_64/interrupts.c
+++ b/kernel/src/sys/arch/x86_64/interrupts.c
@@ -74,5 +74,6 @@ void exception_handler(registers_t *regs) {
     syscall_handle(regs);
   }
   // logln(info, "arch/ints", "Received interrupt %d\n", regs->int_no);
+  //vmm_load_pagemap(curr_proc->pm);
   pic_ack(regs->int_no - 32);
 }
\ No newline at end of file
diff --git a/testing/sk-hello.elf b/testing/sk-hello.elf
index 02ba99caf270dae56247ab78c51cb06771516d74..b36d9a6f1dee0312bd55559d73aa3cdf9027b654 100755
GIT binary patch
delta 64
zcmaE%_&{-j2BX46O><6e1_<DuJV8KW<AehKi4*v_cW?m(J(>?NzWy~?Kp=E-hJXSi
O_vB6ib0B$8Kpg-sOA)33

delta 62
zcmaE$_(E}l2BXGAO><5G1_%(?m^qza;A{gjeEn}Sw?OFRSOH~5fys>m=0I|%fI0x4
C2o?YU

diff --git a/testing/test.asm b/testing/test.asm
index a40f2e3..14e2f8a 100644
--- a/testing/test.asm
+++ b/testing/test.asm
@@ -3,12 +3,7 @@ section .text
     global _start
 
 _start:
-    int 0x80
-    int 0x80
-    int 0x80
-    int 0x80
-    int 0x80
-    int 0x80
-    int 0x80
+    mov rax, 10
 .hey:
+    add rax, 1
     jmp .hey
\ No newline at end of file
diff --git a/testing/test.o b/testing/test.o
index dac71eb80f2bb401d39a484d2fae2ae1c220ac27..b3d93e1cf35a65bd8d7394cf6a0004acfc464938 100644
GIT binary patch
delta 38
tcmaFB@_=Q+0!HqM3-1f;;9_84@Mu23`1%)+!N4$i0%HRs>tsPDe*g<R3-|y4

delta 38
kcmaFB@_=Q+0!D#}3-1e@Z9s;v|4p92*ucm)S&+#e0E03T*8l(j