feat(bootload): load next stage and preload kernel from FAT

Kernel is now at 0xC0100000, but still we use 4MiB pages, instruction like 'invlpg' which are invalid for cpu prior to 486, and we don't ensure multiboot structures are mapped. Still lot of work

.github/workflows/ci.yml

@@ -11,7 +11,7 @@ jobs:
       - name: Install dependencies
         run: |
           sudo apt-get update
-          sudo apt-get install build-essential llvm lld nasm mtools
+          sudo apt-get install build-essential fasm mtools
       - name: Build
         run: |
           make

.gitignore

@@ -23,3 +23,6 @@ a.out
 *.old
 /bx_enh_dbg.ini
 bochsrc.bxrc
+/tmp
+*.tar.gz
+*.sys

Makefile

@@ -1,13 +1,43 @@
-.DEFAULT_GOAL := all
-TOPDIR	:= $(CURDIR)
-export TOPDIR
-
-SUBDIR := thirdparty lib bin kernel
-
-.PHONY: docs
-docs:
-	-mkdir -p docs/html
-	naturaldocs -p docs/config -img docs/img -xi tmp -i . -o HTML docs/html
-	cp docs/img/favicon.ico docs/html/
-
-include $(TOPDIR)/share/mk/stupid.subdir.mk
+TOPDIR     := $(dir $(realpath $(lastword $(MAKEFILE_LIST))))
+SYSROOTDIR := $(TOPDIR)/sysroot
+TOOLSDIR   := $(TOPDIR)/tools
+
+RM = echo
+
+SUBDIRS	:= boot kernel lib bin
+
+TARGET	= stupid.tar.gz floppy_boot.img
+ifneq ($(OS),Windows_NT)
+TARGET	+= stupid.iso
+endif
+
+.PHONY: all
+all: $(TARGET)
+
+GOAL:=install
+clean: GOAL:=clean
+
+.PHONY: $(SUBDIRS)
+$(SUBDIRS):
+	@echo "📁 $@"
+	DESTDIR=$(SYSROOTDIR) $(MAKE) -C $@ $(GOAL)
+
+.PHONY: stupid.iso
+stupid.iso: $(SUBDIRS)
+	$(TOPDIR)/tools/create-iso $@ sysroot
+
+.PHONY: stupid.tar.gz
+stupid.tar.gz: $(SUBDIRS)
+	tar -czvf $@ sysroot
+
+.PHONY: floppy_boot.img
+floppy_boot.img:
+	dd if=/dev/zero of=$@ bs=512 count=1440
+	mformat -C -f 1440 -i $@
+	dd if=boot/bootsector.bin of=$@ conv=notrunc
+	mcopy -i $@ boot/stpdboot.sys ::/STPDBOOT.SYS
+	mcopy -i $@ kernel/vmstupid ::/VMSTUPID.SYS
+
+.PHONY: clean
+clean: $(SUBDIRS)
+	$(RM) $(TARGET) $(SYSROOTDIR)

README.md

@@ -3,18 +3,22 @@
 # StupidOS
 
 [Website](https://stupidos.d0p1.eu)
-![GitHub](https://img.shields.io/github/license/d0p1s4m4/stupidos?logoColor=white&style=flat-square)
-![GitHub issues](https://img.shields.io/github/issues/d0p1s4m4/stupidos?style=flat-square)
+[![GitHub](https://img.shields.io/github/license/d0p1s4m4/stupidos?logoColor=white&style=flat-square)](LICENSE)
+[![GitHub issues](https://img.shields.io/github/issues/d0p1s4m4/stupidos?style=flat-square)](https://github.com/d0p1s4m4/StupidOS/issues)
 [![GitHub Sponsors](https://img.shields.io/github/sponsors/d0p1s4m4?style=flat-square)](https://github.com/sponsors/d0p1s4m4)
 
 </div>
 
-32-bit Operating System in assembly.
+32-bit Operating System written in x86 assembly.
+
+## Philosophy
+
+Nowaday, all Software are overengineered bloatware. So let's try to keep things simple, stupid. 
 
 ## Building
 
 ```
-$ sudo apt install build-essential llvm lld nasm mtools
+$ sudo apt install build-essential fasm mtools
 $ git clone git@github.com:d0p1s4m4/StupidOS.git
 $ cd StupidOS
 $ make
@@ -24,7 +28,7 @@ Pretty easy, isn't it?
 
 ## License
 
-<img src="https://opensource.org/files/OSI_Approved_License.png" align="right" height="128px" alt="OSI Approved License">
+<img src="https://opensource.org/wp-content/themes/osi/assets/img/osi-badge-light.svg" align="right" height="128px" alt="OSI Approved License">
 
 StupidOS is licensed under the 3-Clause BSD License.
 

bin/Makefile

@@ -1,3 +1,11 @@
-NOSUBDIR := 1
+SUBDIRS = cmd
 
-include $(TOPDIR)/share/mk/stupid.subdir.mk
+TOPGOALS = all clean install
+
+.PHONY: $(SUBDIRS)
+$(SUBDIRS):
+	@echo "📁 bin/$@"
+	DESTDIR=$(DESTDIR)/bin $(MAKE) -C $@ $(MAKECMDGOALS)
+
+.PHONY: $(TOPGOALS)
+$(TOPGOALS): $(SUBDIRS)

bin/cmd/Makefile

@@ -0,0 +1,5 @@
+all:
+
+clean:
+
+install:

bin/cmd/builtins.inc

@@ -0,0 +1,6 @@
+builtins:
+        db 2, 'cd'
+        db 1, '.'
+        db 3, 'set'
+        db 5, 'unset'
+        db 4, 'exit'

bin/cmd/cmd.asm

@@ -0,0 +1,8 @@
+        format ELF
+        entry start
+
+        include 'builtins.inc'
+
+start:
+
+        int 0x2A

boot/Makefile

@@ -0,0 +1,29 @@
+AS = fasm
+RM = rm
+
+TARGET = bootsector.bin stpdboot.sys
+
+STAGE0_SRCS	= boot0.asm \
+			const.inc \
+			fat12.inc
+
+STAGE1_SRCS	= boot1.asm \
+			const.inc \
+			a20.inc
+
+.PHONY: all
+all: $(TARGET)
+
+bootsector.bin: $(STAGE0_SRCS)
+	$(AS) boot0.asm $@
+
+stpdboot.sys: $(STAGE1_SRCS)
+	$(AS) boot1.asm $@
+
+.PHONY: clean
+clean:
+	$(RM) $(TARGET)
+
+.PHONY: install
+install: $(TARGET)
+	@ mkdir -p $(DESTDIR)

boot/README.org

@@ -0,0 +1,2 @@
+#+TITLE: StupidOS Bootloader
+

boot/a20.inc

@@ -0,0 +1,171 @@
+        ; copy/pasted from https://wiki.osdev.org/A20_Line
+        ; .... sorry I was lazy :x
+
+a20_get_state:
+        pushf
+        push si
+        push di
+        push ds
+        push es
+
+        cli
+
+        xor ax, ax
+        mov ds, ax
+        mov si, 0x500
+
+        not ax
+        mov es, ax
+        mov di, 0x0510
+
+        mov al, [ds:si]  ; save old values
+        mov byte [.BufferBelowMB], al
+        mov al, [es:di]
+        mov byte [.BufferOverMB], al
+ 
+        mov ah, 1 ; check byte [0x00100500] == byte [0x0500]
+        mov byte [ds:si], 0
+        mov byte [es:di], 1
+        mov al, [ds:si]
+        cmp al, [es:di]
+        jne .exit
+        dec ah
+.exit:
+        mov al, [.BufferBelowMB]
+        mov [ds:si], al
+        mov al, [.BufferOverMB]
+        mov [es:di], al
+        shr ax, 8
+        sti
+        pop es
+        pop ds
+        pop di
+        pop si
+        popf
+        ret
+ 
+.BufferBelowMB: db 0
+.BufferOverMB   db 0
+
+
+a20_query_support:
+        push bx
+        clc
+ 
+        mov ax, 0x2403
+        int 0x15
+        jc .error
+ 
+        test ah, ah
+        jnz .error
+ 
+        mov ax, bx
+        pop bx
+        ret
+.error:
+        stc
+        pop bx
+        ret
+ 
+a20_enable_keyboard_controller:
+        cli
+ 
+        call .wait_io1
+        mov al, 0xad
+        out 0x64, al
+ 
+        call .wait_io1
+        mov al, 0xd0
+        out 0x64, al
+ 
+        call .wait_io2
+        in al, 0x60
+        push eax
+ 
+        call .wait_io1
+        mov al, 0xd1
+        out 0x64, al
+ 
+        call .wait_io1
+        pop eax
+        or al, 2
+        out 0x60, al
+ 
+        call .wait_io1
+        mov al, 0xae
+        out 0x64, al
+ 
+        call .wait_io1
+        sti
+        ret
+.wait_io1:
+        in al, 0x64
+        test al, 2
+        jnz .wait_io1
+        ret
+.wait_io2:
+        in al, 0x64
+        test al, 1
+        jz .wait_io2
+        ret
+ 
+;       out:
+;               cf - set on error
+a20_enable:
+        clc                                                                     ;       clear cf
+        pusha
+        mov bh, 0                                                       ;       clear bh
+ 
+        call a20_get_state
+        jc .fast_gate
+ 
+        test ax, ax
+        jnz .done
+ 
+        call a20_query_support
+        mov bl, al
+        test bl, 1                                                      ;       enable A20 using keyboard controller
+        jnz .keybord_controller
+ 
+        test bl, 2                                                      ;       enable A20 using fast A20 gate
+        jnz .fast_gate
+.bios_int:
+        mov ax, 0x2401
+        int 0x15
+        jc .fast_gate
+        test ah, ah
+        jnz .failed
+        call a20_get_state
+        test ax, ax
+        jnz .done
+.fast_gate:
+        in al, 0x92
+        test al, 2
+        jnz .done
+ 
+        or al, 2
+        and al, 0xfe
+        out 0x92, al
+ 
+        call a20_get_state
+        test ax, ax
+        jnz .done
+ 
+        test bh, bh                                                     ;       test if there was an attempt using the keyboard controller
+        jnz .failed
+.keybord_controller:
+        call a20_enable_keyboard_controller
+        call a20_get_state
+        test ax, ax
+        jnz .done
+ 
+        mov bh, 1                                                       ;       flag enable attempt with keyboard controller
+ 
+        test bl, 2
+        jnz .fast_gate
+        jmp .failed
+.failed:
+        stc
+.done:
+        popa
+        ret

boot/boot0.asm

@@ -0,0 +1,120 @@
+        INCLUDE 'const.inc'
+
+        ORG STAGE0_BASE
+        USE16
+
+        jmp short _start
+        nop
+
+        ; Boot Record
+OEM_identifier      db 'STUPID  '
+bytes_per_sector    dw 512
+sectors_per_cluster db 1
+reserved_sectors    dw 1
+FAT_count           db 2
+root_dir_entries    dw 224
+total_sectors       dw 2880
+media_desc_type     db 0xF0
+sectors_per_FAT     dw 9
+sectors_per_track   dw 18
+heads_per_cylinder  dw 2
+hidden_sectors      dd 0
+large_sector_count  dd 0
+
+        ; Extended Boot Record
+drive_number db 0x0
+reserved     db 0x0
+signature    db 0x29   ; 0x28 or 0x29
+volume_id    dd 0xB00B135 ; hope mine will grow :'(
+volume_label db 'Stupid Boot'
+system_id    db 'FAT12  '
+
+
+_start:
+        cli
+        cld
+        jmp 0x0:.canonicalize_cs
+
+.canonicalize_cs:
+        xor ax, ax
+        mov ds, ax
+        mov ss, ax
+        mov es, ax
+        mov sp, 0x7c00
+
+        mov [drive_number], dl
+
+        ; reset floppy disk
+@@:
+        mov dl, [drive_number]
+        xor ah, ah
+        int 0x13
+        jc @b
+
+        call fat_load_root
+
+        ; search in root directory
+
+        mov si, kernel_file
+        call fat_search_root
+        jc .error_not_found
+        mov [kernel_start], ax
+
+        mov si, stage1_file
+        call fat_search_root
+        jc .error_not_found
+        mov [stage1_start], ax
+
+        ; load fat
+        xor ax, ax
+        mov al, [FAT_count]
+        mul word [sectors_per_FAT]
+        mov cx, ax
+        mov ax, [reserved_sectors]
+
+        xor bx, bx
+
+        call disk_read_sectors
+
+        ; preload kernel
+        mov ax, KERNEL_PRELOAD/0x10
+        mov es, ax
+        mov ax, [kernel_start]
+        xor bx, bx
+        call fat_load_binary
+
+        ; load stage 2
+        mov ax, STAGE1_BASE/0x10
+        mov es, ax
+        mov ax, [stage1_start]
+        xor bx, bx
+        call fat_load_binary
+
+        jmp 0x0:STAGE1_BASE
+
+.error_not_found:
+        push si
+        mov si, msg_error
+        call bios_print
+        pop si
+        call bios_print
+        mov si, msg_not_found
+        call bios_print
+        hlt
+        jmp $
+
+        INCLUDE "utils.inc"
+        INCLUDE "fat12.inc"
+
+msg_error                  db "ERROR: ", 0
+msg_not_found              db " not found", CR, LF, 0
+
+kernel_file db "VMSTUPIDSYS", 0
+stage1_file db "STPDBOOTSYS", 0
+
+kernel_start dw 0x0
+stage1_start dw 0x0
+
+
+        rb 0x7C00+512-2-$
+        db 0x55, 0xAA

boot/boot1.asm

@@ -0,0 +1,28 @@
+        INCLUDE 'const.inc'
+
+        ORG STAGE1_BASE
+        USE16
+
+stage2:
+        push cs
+        pop ds
+
+        mov si, msg_stage2
+        call bios_print
+
+        call a20_enable
+        jc .error_a20
+
+        jmp .hang
+.error_a20:
+        mov si, msg_error_a20
+        call bios_print
+.hang:
+        hlt
+        jmp $
+
+        INCLUDE 'a20.inc'
+        INCLUDE 'utils.inc'
+
+msg_stage2    db "StupidOS Bootloader (Stage 1)", 0x0D, 0x0A, 0
+msg_error_a20 db "ERROR: can't enable a20 line", 0x0D, 0x0A, 0

boot/const.inc

@@ -0,0 +1,9 @@
+CR   = 0x0D
+LF   = 0x0A
+; -------- Address ----------
+STAGE0_BASE    = 0x7C00
+STAGE1_BASE    = 0x1000
+DISK_BUFFER    = 0x8000
+KERNEL_PRELOAD = 0xF000
+STACK_TOP      = 0x7000
+

boot/fat12.inc

@@ -0,0 +1,181 @@
+        ATTR_READ_ONLY = 0x01
+        ATTR_HIDDEN    = 0x02
+        ATTR_SYSTEM    = 0x04
+        ATTR_VOLUME_ID = 0x08
+        ATTR_DIRECTORY = 0x10
+        ATTR_ARCHIVE   = 0x20
+
+        struc fat_entry
+        {
+                .name          db 8 dup ?
+                .ext           db 3 dup ?
+                .attrs         db ?
+                .reserved      dw ?
+                .creation_time dw ?
+                .creation_date dw ?
+                .access_date   dw ?
+                .reserved2     dw ?
+                .mod_time      dw ?
+                .mod_date      dw ?
+                .start         dw ?
+                .size          dd ?
+        }
+
+        virtual at di
+
+                fat_entry fat_entry
+        end virtual
+
+
+        ; CHS to LBA
+        ; LBA = (C * HPC + H) * SPT + (S - 1)
+
+        ;;; Read sectors from disk to buffer
+        ;;;
+        ;;; @param AX LBA starting sector
+        ;;; @param CX sector count
+        ;;; @param ES:BX buffer
+        ;;;
+disk_read_sectors:
+        ; https://en.wikipedia.org/wiki/Logical_block_addressing
+        ; convert LBA to CHS
+        ; HPC = Head per Cluster
+        ; SPT = Sector per Track
+
+        ; S = (LBA % SPT) + 1
+        push ax
+        push bx
+        push cx
+        xor dx, dx
+        div word [sectors_per_track]
+        inc dx
+        mov [S], dx
+
+        ; H = (LBA / SPT) % HPC
+        ; C =  LBA  / (HPC * SPT)
+        xor dx, dx
+        div word [heads_per_cylinder]
+        mov [C], ax
+        mov [H], dx
+
+        ; read sectors
+        mov ah, 0x2
+        mov al, 0x1
+        mov ch, byte [C]
+        mov cl, byte [S]
+        mov dh, byte [H]
+        mov dl, [drive_number]
+
+        int 0x13
+        jc @f
+        pop cx
+        pop bx
+        pop ax
+        add bx, word [bytes_per_sector]
+        inc ax
+        loop disk_read_sectors
+        ret
+@@:
+        mov si, msg_error_sector
+        call bios_print
+        ret
+
+C dw 0x00
+H dw 0x00
+S dw 0x00
+
+fat_load_root:
+        mov ax, DISK_BUFFER/0x10
+        mov es, ax
+
+        ; load root directory
+        mov ax, [sectors_per_FAT]
+        xor cx, cx
+        mov cl, [FAT_count]
+        mul cx
+        add ax, [reserved_sectors]
+        push ax
+
+        mov bx, [bytes_per_sector]
+        mov cl, 0x5
+        shr bx, cl
+        mov ax, [root_dir_entries]
+        xor dx, dx
+        div bx
+        mov cx, ax
+        pop ax
+
+        mov [data_start], ax
+        add [data_start], cx
+
+        xor bx, bx
+
+        call disk_read_sectors
+
+        ret
+
+        ;; @param SI filename to search
+fat_search_root:
+        mov cx, [root_dir_entries]
+        mov di, 0x0
+@@:
+        push si
+        push cx
+        mov cx, 0xB ; name(8) + ext(3)
+        push di
+        rep cmpsb
+        pop di
+        pop cx
+        pop si
+        je .file_found
+        add di, 0x20
+        loop @b
+        ; set carry if not found
+        stc
+        ret
+.file_found:
+        mov ax, [es:fat_entry.start]
+        clc
+        ret
+
+        ;;; @param AX cluster
+        ;;; @param ES:BX buffer
+fat_load_binary:
+        push ax
+        sub ax, 0x2
+        xor cx, cx
+        mov cl, [sectors_per_cluster]
+        mul cx
+
+        add ax, [data_start]
+        xor cx, cx
+        mov cl, [sectors_per_cluster]
+        call disk_read_sectors
+
+        pop ax
+        mov cx, ax
+        mov dx, ax
+        shr dx, 0x1
+        add cx, dx
+        push bx
+        mov bx, DISK_BUFFER
+        add bx, cx
+        mov dx, [bx]
+        pop bx
+
+        test ax, 0x1
+        jnz .odd_cluster
+.even_cluster:
+        and dx, 0xFFF
+        jmp .end
+.odd_cluster:
+        shr dx, 0x4
+.end:
+        mov ax, dx
+        cmp dx, 0xFF0
+        jb fat_load_binary
+        ret
+
+
+msg_error_sector           db "ERROR: reading sector", CR, LF, 0
+data_start dw 0x0

boot/utils.inc

@@ -0,0 +1,9 @@
+bios_print:
+        lodsb
+        or al, al
+        jz @f
+        mov ah, 0x0E
+        int 0x10
+        jmp bios_print
+@@:
+        ret

docs/config/Menu.txt

@@ -41,33 +41,65 @@ Timestamp: Updated yyyy/mm/dd
 File: Introduction  (docs/intro.txt)
 Link: Source Code  (https://github.com/d0p1s4m4/StupidOS)
 File: Coding Style  (docs/coding-style.txt)
+File: Building  (building.txt)
 File: FAQ  (docs/faq.txt)
 
 Group: Kernel  {
 
-   File: head.s  (kernel/head.s)
-   File: gdt.s  (kernel/gdt.s)
-   File: idt.s  (kernel/idt.s)
-   File: multiboot.inc  (kernel/multiboot.inc)
-   File: pic.s  (kernel/pic.s)
-   File: paging.s  (no auto-title, kernel/paging.s)
+   File: Introduction  (kernel/intro.txt)
 
-   Group: Driver  {
+   Group: boot  {
 
-      File: serial.s  (no auto-title, kernel/drivers/serial.s)
-      }  # Group: Driver
+      File: gdt.s  (kernel/boot/gdt.s)
+      File: head.s  (kernel/boot/head.s)
+      File: idt.s  (kernel/boot/idt.s)
+      }  # Group: boot
 
    File: kernel.s  (kernel/kernel.s)
-   File: msg_en  (kernel/i18n/msg_en.s)
+   File: pic.s  (kernel/pic.s)
+
+   Group: dev  {
+
+      Group: AT  {
+
+         File: IBM PC/AT  (kernel/dev/at/intro.txt)
+         File: cmos.s  (kernel/dev/at/cmos.s)
+         File: pit.s  (kernel/dev/at/pit.s)
+         File: serial.s  (kernel/dev/at/serial.s)
+         }  # Group: AT
+
+      }  # Group: dev
+
+   Group: i18n  {
+
+      File: msg_en.s  (kernel/i18n/msg_en.s)
+      }  # Group: i18n
+
    File: pmm.s  (kernel/pmm.s)
+
+   Group: sys  {
+
+      File: multiboot.inc  (kernel/sys/multiboot.inc)
+
+      Group: i386  {
+
+         File: cpu.inc  (kernel/sys/i386/cpu.inc)
+         File: cpuid.inc  (kernel/sys/i386/cpuid.inc)
+         File: mmu.inc  (kernel/sys/i386/mmu.inc)
+         File: registers.inc  (kernel/sys/i386/registers.inc)
+         }  # Group: i386
+
+      }  # Group: sys
+
+   File: vm.inc  (kernel/vm/vm.inc)
+   File: pmap.s  (kernel/vm/pmap.s)
    }  # Group: Kernel
 
 Group: Lib  {
 
-   File: base.inc  (lib/base.inc)
-
    Group: Base  {
 
+      File: base.inc  (lib/base/base.inc)
       File: log.s  (lib/base/log.s)
       }  # Group: Base
 

docs/img/pmap_bootstrap.mmd

@@ -0,0 +1,89 @@
+---
+title: pmap_bootstrap
+---
+flowchart TD
+
+R_BEGIN("Begin")
+R_GETMMAP["Get Memory Map entry"]
+R_MMAP_LAST{"Last Item ?"}
+R_END("End")
+
+subgraph "entry to pmap_block"
+    C_BEGIN("Begin Proc")
+    C_IS_FREE{"Is
+    entry free?"}
+    C_END("End Proc")
+    C_OVERLAP_KERNEL{"entry
+    overlap
+    kernel?"}
+    C_REMOVE_KRESERVED["Remove Kernel
+    Memory from entry"]
+    C_MEMORY_SIZE_EXCEED{"Is entry size
+    larger than
+    0x0x7f80000 ?"}
+    C_MEMORY_SPLIT["Split entry"]
+    C_MEMORY_LAST["Is last ?"]
+
+    C_BEGIN-->C_IS_FREE
+    C_IS_FREE--No-->C_END
+    C_IS_FREE--Yes-->C_OVERLAP_KERNEL
+    C_OVERLAP_KERNEL--Yes-->C_REMOVE_KRESERVED
+    C_REMOVE_KRESERVED-->C_MEMORY_SIZE_EXCEED
+    C_OVERLAP_KERNEL--No-->C_MEMORY_SIZE_EXCEED
+    C_MEMORY_SIZE_EXCEED--Yes-->C_MEMORY_SPLIT
+    C_MEMORY_SPLIT-->C_MEMORY_LAST
+    C_MEMORY_LAST--Yes-->C_END
+
+end
+
+subgraph "create & store pmap_block"
+    D_BEGIN("Begin Proc")
+    D_BOOSTRAP_EXIST{"Bootstrap
+    pmap_block
+    exist?"}
+    D_SETUP_BOOTSTRAP["Setup bootstrap pmap"]
+    D_END("End Proc")
+    D_SET_HEAD_BOOTSTRAP["Set bootstrap as Head"]
+    D_SEARCH_FREE_PAGE["Search free page in Head->bitmap"]
+    D_FREE_PAGE_FOUND{"Free Page found ?"}
+    D_HEAD_NEXT_NULL{"Head->next == NULL?"}
+    D_HEAD_NEXT["Set Head to Head->next"]
+    D_CREATE_PMAP["Create new pmap_block
+    in free page"]
+    D_APPEND_PMAP["Append pmap_block
+    at end of
+    linked list"]
+
+    D_BEGIN-->D_BOOSTRAP_EXIST
+    D_BOOSTRAP_EXIST--No-->D_SETUP_BOOTSTRAP
+    D_SETUP_BOOTSTRAP-->D_END
+    D_BOOSTRAP_EXIST--Yes-->D_SET_HEAD_BOOTSTRAP
+    D_SET_HEAD_BOOTSTRAP-->D_SEARCH_FREE_PAGE
+    D_SEARCH_FREE_PAGE-->D_FREE_PAGE_FOUND
+    D_FREE_PAGE_FOUND--No-->D_HEAD_NEXT_NULL
+    D_HEAD_NEXT_NULL--No-->D_HEAD_NEXT
+    D_HEAD_NEXT-->D_SEARCH_FREE_PAGE
+    D_FREE_PAGE_FOUND--Yes-->D_CREATE_PMAP
+    D_CREATE_PMAP-->D_APPEND_PMAP
+    D_APPEND_PMAP-->D_END
+end
+
+R_BEGIN-->R_GETMMAP
+R_GETMMAP-->R_MMAP_LAST
+R_MMAP_LAST--Yes-->R_END
+
+R_MMAP_LAST--No-->C_BEGIN
+C_MEMORY_SIZE_EXCEED--No-->D_BEGIN
+D_END--Try get next-->C_MEMORY_LAST
+C_MEMORY_LAST--No-->D_BEGIN
+C_END--Try get next entry-->R_MMAP_LAST
+
+
+style R_BEGIN fill:#6CA300
+style R_END fill:#A30000
+
+style C_BEGIN fill:#6CA300
+style C_END fill:#A30000
+
+style D_BEGIN fill:#6CA300
+style D_END fill:#A30000

docs/intro.txt

@@ -2,17 +2,14 @@ File: Introduction
 
 About: StupidOS
 
-(see logo.png)   
+(see logo.png)
 
 Donate:
 
 - <Liberapay at https://liberapay.com/d0p1/>
 - <Github Sponsors at https://github.com/sponsors/d0p1s4m4>
 - Monero: 85cm3SuAs98dcqXcdiyCNz6hkb5fKwHbtJYr8cyFdAGWKgj8rG3kPENNv1BXVp2HsiaC8otTzxxaEEuUVZQFxrSr7eBY2uw
-- Zcash: zs1sqsdn4acrqygvupmhwl5vvzcdjk6fd4p6n3k4nzdey0huq7cwkl2ca7dru8alhhtan47wjes0x9
 - Bitcoin: bc1qhpxa0hgj0mjstttkjgg6ees9dj5kadty04kgpp
-- Oxen: LDrNKN6iXh98zUZbwa9iGmeuiWbrzU2WTKWwcwMYFSeCj2QACxfyFXNVQyN8QBe61bFgqtykTYpgcaWvf2C1K77KMQ82DaC
-- Gridcoin: S8tw8EWXQ6p529kLEniCePceNAFTyc3GKM
 
 About: License
 

kernel/Makefile

@@ -1,5 +1,27 @@
-KERNEL	= vmstupid
-SRCS	= head.s gdt.s pic.s isr.s idt.s pmm.s paging.s \
-			lib/log.s drivers/serial.s
+AS	= fasm
+RM	= rm -f
+INSTALL = install
 
-include $(TOPDIR)/share/mk/stupid.kernel.mk
+KERNEL	= vmstupid
+SRCS	= kernel.asm \
+			const.inc \
+			boot/multiboot.inc \
+			boot/boot.inc \
+			mm/mm.inc
+
+.PHONY: all
+all: $(KERNEL)
+
+$(KERNEL): $(SRCS)
+	$(AS) kernel.asm $@
+
+.PHONY: clean
+clean:
+	$(RM) $(KERNEL)
+
+.PHONY: install
+install: $(KERNEL)
+	@ mkdir -p $(DESTDIR)
+	install $< $(DESTDIR)
+
+.PHONY: all clean

kernel/base/console.s

@@ -1,4 +0,0 @@
-struc console
-	.init:
-	
-endstruc

kernel/boot/boot.inc

@@ -0,0 +1,35 @@
+        ORG 0x100000
+        ALIGN 4
+        USE32
+
+        INCLUDE 'boot/multiboot.inc'
+        INCLUDE 'const.inc'
+
+mb_header MultibootHeader MB_FLAGS, mb_header, VIDEO_WIDTH, VIDEO_HEIGHT, VIDEO_DEPTH
+
+_start:
+        cli
+        cmp eax, MULTIBOOT_MAGIC
+        jne hang
+
+        ; iterate over memory
+
+        ;
+
+        ;
+        xor esi, esi
+        mov edi, kernel_page_table - KBASE
+
+        mov ecx, kernel_page_directory - KBASE
+        mov cr3, ecx
+
+        mov ecx, cr0
+
+
+hang:
+        hlt
+        jmp $-1
+
+       ; SEGMENT readable writable
+
+boot_struct dd 0x0

kernel/boot/multiboot.inc

@@ -0,0 +1,106 @@
+MULTIBOOT_HDR_MAGIC = 0x1BADB002
+MULTIBOOT_MAGIC     = 0x2BADB002
+
+MULTIBOOT_HDR_ALIGN   = 0x1
+MULTIBOOT_HDR_MEMINFO = 0x2
+MULTIBOOT_HDR_VIDEO   = 0x4
+
+struc MultibootHeader flags,addr,width,height,depth
+{
+        .magic    dd MULTIBOOT_HDR_MAGIC
+        .flags    dd flags
+        .checksum dd -(MULTIBOOT_HDR_MAGIC + flags)
+
+        ; address fields (we'll just skip them)
+        .header_addr   dd addr
+        .load_addr     dd 0x100000
+        .load_end_addr dd _edata - KBASE
+        .bss_end_addr  dd _end - KBASE
+        .entry_addr    dd _start
+
+        ; Video mode
+        .mode_type dd 0x0
+        .width     dd width
+        .height    dd height
+        .depth     dd depth
+}
+
+struc MultibootData
+{
+        .flags dd ?
+
+        ; if flags[0] is set
+        .mem_lower dd ?
+        .mem_upper dd ?
+
+        ; if flags[1] is set
+        .boot_device dd ?
+
+        ; if flags[2] is set
+        .cmdline dd ?
+
+        ; if flags[3] is set
+        .mods_count dd ?
+        .mods_addr  dd ?
+
+        ; if flags[4] is set
+        .syms dd 4 dup ?
+
+        ; if flags[6] is set
+        .mmap_length dd ?
+        .mmap_addr   dd ?
+
+        ; if flags[7] is set
+        .drives_length dd ?
+        .drives_addr   dd ?
+
+        ; if flags[8] is set
+        .config_table dd ?
+
+        ; if flags[9] is set
+        .bootloader_name dd ?
+
+        ; if flags[10] is set
+        .apm_table dd ?
+
+        ; if flags[11] is set
+        .vbe_control_info dd ?
+        .vbe_mode_info    dd ?
+        .vbe_mode         dw ?
+        .vbe_if_seg       dw ?
+        .vbe_if_off       dw ?
+        .vbe_if_length    dw ?
+
+        ; if flags[12] is set
+        .fb_addr   dq ?
+        .fb_pitch  dd ?
+        .fb_width  dd ?
+        .fb_height dd ?
+        .fb_bpp    db ?
+        .fb_type   db ?
+        .fb_misc   dw 3 dup ?
+}
+
+MULTIBOOT_DATA_MEM             = 0x0001
+MULTIBOOT_DATA_BOOTDEV         = 0x0002
+MULTIBOOT_DATA_CMDLINE         = 0x0004
+MULTIBOOT_DATA_MODULES         = 0x0008
+MULTIBOOT_DATA_MMAP            = 0x0040
+MULTIBOOT_DATA_DRIVES          = 0x0080
+MULTIBOOT_DATA_BOOTLOADER_NAME = 0x0200
+MULTIBOOT_DATA_VBE             = 0x0800
+MULTIBOOT_DATA_FB              = 0x1000
+
+struc MultibootMMap
+{
+        .size   dd ?
+        .addr   dq ?
+        .length dq ?
+        .type   dd ?
+}
+
+MULTIBOOT_MEMORY_AVAILABLE = 0x1
+MULTIBOOT_MEMORY_RESERVED  = 0x2
+MULTIBOOT_MEMORY_ACPI      = 0x3
+MULTIBOOT_MEMORY_NVS       = 0x4
+MULTIBOOT_MEMORY_BADPARAM  = 0x5

kernel/const.inc

@@ -0,0 +1,53 @@
+KBASE = 0xC0000000
+PSIZE = 0x1000
+
+; --------- VERSION -------------
+VERSION_MAJOR = 1
+VERSION_MINOR = 0
+
+
+; --------- BOOT PARAMS ---------
+MB_FLAGS     = MULTIBOOT_HDR_ALIGN or MULTIBOOT_HDR_MEMINFO or MULTIBOOT_HDR_VIDEO
+VIDEO_WIDTH  = 1024
+VIDEO_HEIGHT = 768
+VIDEO_DEPTH  = 32
+
+; --------- Registers ------------
+CR0_PE = 0x00000001
+CR0_MP = 0x00000002
+CR0_EM = 0x00000004
+CR0_TS = 0x00000008
+CR0_ET = 0x00000010
+CR0_NE = 0x00000020
+CR0_WP = 0x00010000
+CR0_AM = 0x00040000
+CR0_NW = 0x20000000
+CR0_CD = 0x40000000
+CR0_PG = 0x80000000
+
+CR3_PWT = 0x08
+CR3_PCD = 0x10
+
+CR4_VME        = 0x0000001
+CR4_PVI        = 0x0000002
+CR4_TSD        = 0x0000004
+CR4_DE         = 0x0000008
+CR4_PSE        = 0x0000010
+CR4_PAE        = 0x0000020
+CR4_MCE        = 0x0000040
+CR4_PGE        = 0x0000080
+CR4_PCE        = 0x0000100
+CR4_OSDXSR     = 0x0000200
+CR4_OSXMMEXCPT = 0x0000400
+CR4_UMIP       = 0x0000800
+CR4_VMXE       = 0x0002000
+CR4_SMXE       = 0x0004000
+CR4_FSGSBASE   = 0x0010000
+CR4_PCIDE      = 0x0020000
+CR4_OSXSAVE    = 0x0040000
+CR4_SMEP       = 0x0100000
+CR4_SMAP       = 0x0200000
+CR4_PKE        = 0x0400000
+CR4_CET        = 0x0800000
+CR4_PKS        = 0x1000000
+

kernel/cpu.inc

@@ -1,51 +0,0 @@
-struc tss
-	.link: resd 1
-	
-endstruc
-
-struc gdt_entry
-	.limit_low: resw 1
-	.base_low: resw 1
-	.base_mid: resb 1
-	.access: resb 1
-	.flags: resb 1
-	.base_high: resb 1
-endstruc
-
-struc idt_entry
-	.limit_low: resw 1
-	.selector: resw 1
-	.zero: resb 1
-	.attr: resb 1
-	.base_high: resw 1
-endstruc
-
-struc intframe
-	;; registers
-	.edi: resd 1
-	.esi: resd 1
-	.ebp: resd 1
-	.esp: resd 1
-	.ebx: resd 1
-	.edx: resd 1
-	.ecx: resd 1
-	.eax: resd 1
-
-	;;
-	.gs: resd 1
-	.fs: resd 1
-	.es: resd 1
-	.ds: resd 1
-	.intno: resd 1
-
-	;; by x86 hardware
-	.err: resd 1
-	.eip: resd 1
-	.cs:  resd 1
-	.eflags: resd 1
-
-	;; crossring
-	.useresp: resd 1
-	.ss: resd 1
-endstruc
-

kernel/drivers/serial.s

@@ -1,64 +0,0 @@
-section .text
-
-COM1 equ 0x3F8
-COM2 equ 0x2F8
-COM3 equ 0x3E8
-COM4 equ 0x2E8
-
-THR equ 0x0
-RBR equ 0x0
-IER equ 0x1
-IIR equ 0x2
-LCR equ 0x3
-MCR equ 0x4
-LSR equ 0x5
-MSR equ 0x7
-DLL equ 0x0
-DLH equ 0x0
-
-%macro COM_OUT 3
-	mov dx, %1+%2
-	mov al, %3
-	out dx, al
-%endmacro
-
-%macro COM_IN 2
-	mov dx, %1+%2
-	in al, dx
-%endmacro
-
-	; Function: serial_init
-	; 
-	; in:
-	;     none
-	;
-	; out:
-	;     none
-	;
-global serial_init
-serial_init:
-	COM_OUT COM1, IER, 0x00
-	COM_OUT COM1, LCR, 0x80
-	COM_OUT COM1, DLH, 0x00
-	COM_OUT COM1, DLL, 0x0C
-
-	COM_OUT COM1, LCR, 0x03
-
-	ret
-
-	; Function: serial_write
-	; 
-	; in:
-	;     none
-	;
-	; out:
-	;     none
-	;
-global serial_write
-serial_write:
-	push ebp
-	mov ebp, esp
-	mov ecx, [ebp + 8]
-	COM_OUT COM1, THR, cl 
-	leave
-	ret

kernel/fs/vfs.inc

@@ -1,14 +0,0 @@
-
-struc superblock
-	.devid: resd 1
-	.size: resd 1
-	.ninode: resd 1
-	.fs_type: resd 1
-endstruc
-
-struc inode
-	.devid: resd 1
-	.size: resd 1
-	.inode: resd 1s
-	.access: resd 1
-endstruc

kernel/gdt.s

@@ -1,76 +0,0 @@
-; file: gdt.s
-;
-;
-[BITS 32]
-
-section .text
-
-	; Function: setup_gdt
-	; 
-	; in:
-	;     none
-	;
-	; out:
-	;     none
-	;
-global setup_gdt
-setup_gdt:
-	lgdt [gdt_ptr]
-	mov eax, cr0
-	or al, 1
-	mov cr0, eax
-	jmp 0x08:.flush_cs
-.flush_cs:
-	mov ax, 0x10 ; data segment
-	mov ds, ax
-	mov es, ax
-	mov fs, ax
-	mov gs, ax
-	mov ss, ax
-	ret
-
-section .data
-
-gdt_ptr:
-	dw gdt_entries.end - gdt_entries - 1
-	dd gdt_entries
-
-gdt_entries:
-	;; null descriptor
-	dd 0x0
-	dd 0x0
-
-	;; kernel mode code segment
-	dw 0xFFFF ; Limit
-	dw 0x0000 ; Base (low)
-	db 0x00   ; Base (mid)
-	db 0x9A   ; Access: 1 (P) 0 (DPL), 1 (S), 1010 (Type)
-	db 0xCF   ; Granularity: 1 (G), 1 (D/B), 0 (AVL), Limit
-	db 0x00   ; Base (high)
-
-	;; kernel mode data segment
-	dw 0xFFFF
-	dw 0x0000
-	db 0x00
-	db 0x92
-	db 0xCF
-	db 0x00
-
-	;; user mode code segment
-	dw 0xFFFF
-	dw 0x0000
-	db 0x00
-	db 0xFA
-	db 0xCF
-	db 0x00
-
-	;; user mode data segment
-	dw 0xFFFF
-	dw 0x0000
-	db 0x00
-	db 0xF2
-	db 0xCF
-	db 0x00
-
-	;; TSS
-.end:

kernel/head.s

@@ -1,110 +0,0 @@
-; file: head.s
-;
-[BITS 32]
-
-%include "base.inc"
-%include "multiboot.inc"
-
-; Define: MB_HDR_FLAGS 
-MB_HDR_FLAGS equ MB_HDR_ALIGN | MB_HDR_MEMINFO | MB_HDR_VIDEO
-
-section .multiboot
-align 4
-	istruc mb_header
-		at mb_header.magic,    dd MB_HDR_MAGIC
-		at mb_header.flags,    dd MB_HDR_FLAGS
-		at mb_header.checksum, dd -(MB_HDR_MAGIC + MB_HDR_FLAGS)
-
-		; video mode info
-		at mb_header.mode_type, dd 0
-		at mb_header.width,     dd 1024
-		at mb_header.height,    dd 768
-		at mb_header.depth,     dd 32
-	iend
-
-section .bss
-align 16
-stack_bottom:
-	resb 16384
-stack_top:
-
-section .text
-
-	; Function: entry
-	; setup cpu and paging before calling <kmain>
-	;
-	; in:
-	;     EAX - Multiboot magic
-	;     EBX - Multiboot structure
-	;
-	; out:
-	;     none
-	;
-global entry
-entry:
-	mov esp, stack_top
-	cli ; disable interrupt
-
-	mov edi, eax ; save multiboot magic in EDI
-	mov esi, ebx ; save multiboot structure in ESI
-
-	;; initialize serial (mostly used for debug)
-	extern serial_init
-	call serial_init
-
-	;; make sure we use a multiboot compliant bootloader
-	cmp edi, MB_MAGIC
-	je .multiboot_valid
-
-	LOG err_invalid_boot_magic, edi
-	jmp hang
-	
-.multiboot_valid:
-	
-	LOG msg_hello_world
-	mov eax, [esi + mb_info.bootloader_name]
-	LOG msg_boot_info, eax
-	
-	extern setup_gdt
-	call setup_gdt
-
-	;extern setup_pic
-	;call setup_pic
-	mov al, 0xff
-	out 0xa1, al
-	out 0x21, al
-
-	extern setup_idt
-	call setup_idt
-
-	push esi
-	extern setup_pmm
-	call setup_pmm
-	add esp, 4
-	test eax, 0
-	jz .mem_ok
-
-	LOG err_cannot_map_memory
-
-	jmp hang
-
-.mem_ok:
-	LOG msg_pmm_initialized
-
-	extern setup_paging
-	call setup_paging
-
-hang:
-	cli
-	hlt
-	jmp hang
-	
-section .rodata
-
-msg_hello_world db "StupidOS v", STUPID_VERSION, " (built with ", __NASM_VER__, " on ",  __DATE__, " ", __TIME__, ")", 0
-msg_boot_info db "Bootloader: %s", 0
-msg_pmm_initialized db "PMM initialized", 0
-err_invalid_boot_magic db "[ERROR] Invalid boot magic (got: %x, expected: 0x2BADB002)", 0
-err_cannot_map_memory db "[ERROR] Can't map memory", 0
-
-file db __FILE__, 0

kernel/i18n/i18n.inc

@@ -1,10 +0,0 @@
-struc lang_entry
-	.code: resb 2
-	.data: resd 1
-	.next: resd 1
-endstruc
-
-struc msg_table
-	.hello_world: resd 1
-	.cpu_exceptions: resd 32
-endstruc

kernel/i18n/msg_en.s

@@ -1,102 +0,0 @@
-; file: msg_en
-; English strings
-
-%include "i18n.inc"
-
-.section rodata
-global lang_en
-lang_en:
-	istruc lang_entry
-		at lang_entry.code: db "en"
-		at lang_entry.data: dd msg_en
-		at lang_entry.next: dd 0
-	iend
-
-msg_en:
-	istruc msg_table
-		at msg_table.hello_world: dd msg_hello_world
-
-		at msg_table.cpu_exceptions:
-			dd msg_int_division_zero
-			dd msg_int_debug
-			dd msg_int_nmi
-			dd msg_int_breakpoint
-			dd msg_int_overflow
-			dd msg_int_range_exceeded
-			dd msg_int_invalid_opcode
-			dd msg_int_device_not_available
-			dd msg_int_double_fault
-			dd msg_int_coproc_segment_overrun
-			dd msg_int_invalid_tss
-			dd msg_int_seg_not_present
-			dd msg_int_stack_segfault
-			dd msg_int_gpf
-			dd msg_int_page_fault
-			dd msg_int_reserved
-			dd msg_int_fp_exception
-			dd msg_int_align_check
-			dd msg_int_machine_check
-			dd msg_int_simd_exception
-			dd msg_int_virt_exception
-			dd msg_int_reserved
-			dd msg_int_reserved
-			dd msg_int_reserved
-			dd msg_int_reserved
-			dd msg_int_reserved
-			dd msg_int_reserved
-			dd msg_int_reserved
-			dd msg_int_reserved
-			dd msg_int_reserved
-			dd msg_int_reserved
-			dd msg_int_reserved
-	iend
-
-msg_hello_world:
-	db "StupidOS v", STUPID_VERSION, " (built with ", NASM_VERSION, " on ", BUILD_DATE, ")", 0
-msg_boot_info:
-	db "Bootloader: %s", 0
-msg_pmm_initialized:
-	db "PMM initialized", 0
-err_invalid_boot_magic:
-	db "[ERROR] Invalid boot magic (got: %x, expected: 0x2BADB002)", 0
-err_cannot_map_memory:
-	db "[ERROR] Can't map memory", 0
-warn_no_mmap:
-	db "[WARN] mmap flag not set", 0
-msg_mmap_entry:
-	db "Memory Map Entry:", 0xA
-	db 0x9, "Address: (hi): %x (lo): %x", 0xA
-	db 0x9, "Length: (hi): %x (lo): %x", 0xA
-	db 0x9, "Type: %x", 0
-msg_mem_block:
-	db "Free Memory:", 0xA
-	db 0x9, "Address: %x", 0xA
-	db 0x9, "Length: %x", 0
-msg_max_mem:
-	db "Max memory: %x", 0
-msg_bitmap_stored_at:
-	db "Bitmap stored at: %x", 0
-
-
-msg_int_division_zero: db "Division by zero", 0x0
-msg_int_debug: db "Debug", 0x0
-msg_int_nmi: db "Non-maskable interrupt", 0x0
-msg_int_breakpoint: db "Breakpoint", 0x0
-msg_int_overflow: db "Overflow", 0x0
-msg_int_range_exceeded: db "Bound range exceeded", 0x0
-msg_int_invalid_opcode: db "Invalid Opcode", 0x0
-msg_int_device_not_available: db "Device not available", 0x0
-msg_int_double_fault: db "Double fault", 0x0
-msg_int_coproc_segment_overrun: db "Coprocessor segment overrun", 0x0
-msg_int_invalid_tss: db "Invalid TSS", 0x0
-msg_int_seg_not_present: db "Segment not present", 0x0
-msg_int_stack_segfault: db "Stack segment fault", 0x0
-msg_int_gpf: db "General Protection Fault", 0x0
-msg_int_page_fault: db "Page fault", 0x0
-msg_int_reserved: db "Reserved", 0x0
-msg_int_fp_exception: db "x87 Floating-Point Exception", 0x0
-msg_int_align_check: db "Aligment check", 0x0
-msg_int_machine_check: db "Machine check", 0x0
-msg_int_simd_exception: db "SIMD Floating-Point exception", 0x0
-msg_int_virt_exception: db "Virtualization exception", 0x0
-msg_int_sec_exception: db "Security exception", 0x0

kernel/idt.s

@@ -1,46 +0,0 @@
-; file: idt.s
-;
-[BITS 32]
-section .text
-global setup_idt
-setup_idt:
-%assign i 0
-%rep 32
-	;; TODO: refactor
-extern isr %+ i
-	mov eax, isr %+ i
-	; offset (low)
-	mov word [idt_entries + (i * 8)], ax
-	; segment selector (kernel code)
-	mov word [idt_entries + (i * 8) + 2], 0x08
-
-	; zero (skip)
-	; attr:  1 (Present) 00 (DPL) 0 1 (D: 32bits) 110
-	mov byte [idt_entries + (i * 8) + 5], 0x8F
-
-	; offset (high)
-	shr eax, 16
-	mov word [idt_entries + (i * 8) + 6], ax
-%assign i i+1
-%endrep
-
-	lidt [idt_ptr]
-	sti
-	ret
-
-section .data
-align 8
-idt_ptr:
-	dw idt_entries.end-idt_entries-1
-	dd idt_entries
-
-; variable: idt_entries
-align 8
-idt_entries:
-	times 256 dd 0x00000000, 0x00000000
-	;; dw offset (low)
-	;; dw segment selector
-	;; db zero
-	;; db attr | P | DPL | 0 D 1 1 0 |
-	;; dw offset (high)
-.end:

kernel/isr.s

@@ -1,131 +0,0 @@
-[BITS 32]
-
-%include "cpu.inc"
-%include "base.inc"
-
-%macro ISR_NO_ERR 1
-global isr%1
-isr%1:
-	xchg bx, bx
-	push dword 0
-	push dword %1
-	jmp isr_common
-%endmacro
-
-%macro ISR_ERR 1
-global isr%1
-isr%1:
-	xchg bx, bx
-	push dword %1
-	jmp isr_common
-%endmacro	
-	
-section .text
-
-ISR_NO_ERR 0
-ISR_NO_ERR 1
-ISR_NO_ERR 2
-ISR_NO_ERR 3
-ISR_NO_ERR 4
-ISR_NO_ERR 5
-ISR_NO_ERR 6
-ISR_NO_ERR 7
-ISR_ERR 8
-ISR_NO_ERR 9
-ISR_ERR 10
-ISR_ERR 11
-ISR_ERR 12
-ISR_ERR 13
-ISR_ERR 14
-ISR_NO_ERR 15
-ISR_NO_ERR 16
-ISR_NO_ERR 17
-ISR_NO_ERR 18
-ISR_NO_ERR 19
-ISR_NO_ERR 20
-ISR_NO_ERR 21
-ISR_NO_ERR 22
-ISR_NO_ERR 23
-ISR_NO_ERR 24
-ISR_NO_ERR 25
-ISR_NO_ERR 26
-ISR_NO_ERR 27
-ISR_NO_ERR 28
-ISR_NO_ERR 29
-ISR_NO_ERR 30
-ISR_NO_ERR 31
-
-panic:
-	LOG msg_interrupt
-	;htl
-	;jmp panic
-	ret
-
-
-isr_handler:
-	push ebp
-	mov ebp, esp
-
-.end:
-	leave
-	ret
-
-isr_common:
-	push ds
-	push es
-	push fs
-	push gs
-	pusha
-
-	mov ax, 0x10				; data segment
-	mov ds, ax
-	mov es, ax
-	mov fs, ax
-	mov gs, ax
-
-	;LOG msg_interrupt
-	call isr_handler
-	;extern pic_eoi
-	;call pic_eoi
-	
-	popa
-	pop gs
-	pop fs
-	pop es
-	pop ds
-	add esp, 8					; int no & error code
-
-	iret
-
-section .rodata
-
-msg_int_division_zero: db "Division by zero", 0x0
-msg_int_debug: db "Debug", 0x0
-msg_int_nmi: db "Non-maskable interrupt", 0x0
-msg_int_breakpoint: db "Breakpoint", 0x0
-msg_int_overflow: db "Overflow", 0x0
-msg_int_range_exceeded: db "Bound range exceeded", 0x0
-msg_int_invalid_opcode: db "Invalid Opcode", 0x0
-msg_int_device_not_available: db "Device not available", 0x0
-msg_int_double_fault: db "Double fault", 0x0
-msg_int_coproc_segment_overrun: db "Coprocessor segment overrun", 0x0
-msg_int_invalid_tss: db "Invalid TSS", 0x0
-msg_int_seg_not_present: db "Segment not present", 0x0
-msg_int_stack_segfault: db "Stack segment fault", 0x0
-msg_int_gpf: db "General Protection Fault", 0x0
-msg_int_page_fault: db "Page fault", 0x0
-msg_int_reserved: db "Reserved", 0x0
-msg_int_fp_exception: db "x87 Floating-Point Exception", 0x0
-msg_int_align_check: db "Aligment check", 0x0
-msg_int_machine_check: db "Machine check", 0x0
-msg_int_simd_exception: db "SIMD Floating-Point exception", 0x0
-msg_int_virt_exception: db "Virtualization exception", 0x0
-msg_int_sec_exception: db "Security exception", 0x0
-
-msg_interrupt db "interrupt", 0xA
-	db "edi: %x esi: %x ebp: %x esp: %x", 0xA
-	db "ebx: %x edx: %x ecx: %x eax: %x", 0xA
-	db "gs:  %x fs:  %x es:  %x ds:  %x", 0xA
-	db "int: %x err: %x eip: %x cs:  %x", 0xA
-	db "flg: %x usp: %x ss:  %x", 0x0
-file db __FILE__, 0

kernel/kernel.asm

@@ -0,0 +1,15 @@
+        INCLUDE 'boot/boot.inc'
+
+        ORG $ + KBASE
+
+        INCLUDE 'mm/mm.inc'
+
+kmain:
+       nop
+
+_edata:
+
+        ; BSS
+        rb 0x4000
+
+_end:

kernel/kernel.s

@@ -1,12 +0,0 @@
-; File: kernel.s
-
-[BITS 32]
-
-; Function: kmain
-.global kmain
-kmain:
-	push ebp
-	mov ebp, esp
-
-	leave
-	ret

kernel/linker.ld

@@ -1,30 +0,0 @@
-OUTPUT_ARCH(i386)
-ENTRY(entry)
-
-SECTIONS
-{
-	. = 1M;
-	kernel_start = .;
-
-	.text : ALIGN(4) {
-		KEEP(*(.multiboot))
-		*(.text)
-	}
-
-	.rodata : ALIGN(4) {
-		*(.rodata)
-	}
-
-	.data : ALIGN(4) {
-		*(.data)
-	}
-
-	.bss : ALIGN(4) {
-		*(COMMON)
-		*(.bss)
-	}
-
-	kernel_end = .;
-}
-
-kernel_size = kernel_end - kernel_start;

kernel/mm/mm.inc

@@ -0,0 +1,11 @@
+free_block_head dd 0x0
+
+mm_init:
+
+        ret
+
+
+kernel_page_directory:
+        dd 0x1000 dup 0x0
+kernel_page_table:
+        dd 0x1000 dup 0x0

kernel/mm/stats.inc

@@ -0,0 +1,7 @@
+struc VMStat
+{
+        total_page dd 0
+        free_pages dd 0
+        used_pages dd 0
+}
+

kernel/multiboot.inc

@@ -1,133 +0,0 @@
-; File: multiboot.inc
-
-; Define: MB_HDR_MAGIC
-; Multiboot Header Magic
-MB_HDR_MAGIC equ 0x1BADB002
-
-; Define: MB_MAGIC
-; Multiboot Magic passed by the bootloader.
-MB_MAGIC equ 0x2BADB002
-
-; Structure: mb_header
-;
-; .magic       - todo
-; .flags       - See <flags>
-; .checksum    - todo
-; .aout_kludge - todo
-; .mode_type   - todo
-; .width       - todo
-; .height      - todo
-; .depth       - todo
-struc mb_header
-	.magic: resd 1
-	.flags: resd 1
-	.checksum: resd 1
-	.aout_kludge: resd 5
-	.mode_type: resd 1
-	.width: resd 1
-	.height: resd 1
-	.depth: resd 1
-endstruc
-
-; Defines: flags
-;
-; MB_HDR_ALIGN   - todo
-; MB_HDR_MEMINFO - <mb_info.mem_lower>
-; MB_HDR_VIDEO   - todo
-MB_HDR_ALIGN equ 1 << 0
-MB_HDR_MEMINFO equ 1 << 1
-MB_HDR_VIDEO equ 1 << 2
-
-; Structure: mb_info
-; 
-; Fields:
-; .flags       - See <flags>
-; .mem_lower   - todo
-; .mem_upper   - todo
-; .boot_device - todo
-;    .
-struc mb_info
-
-	;; flags
-	.flags: resd 1
-
-	;; flags[0] is set
-	.mem_lower: resd 1
-	.mem_upper: resd 1
-
-	;; flags[1] is set
-	.boot_device: resd 1
-
-	;; flags[2] is set
-	.cmdline: resd 1
-
-	;; flags[3] is set
-	.mods_count: resd 1
-	.mods_addr: resd 1
-
-	;; flags[4] || flags[4] is set
-	.syms: resd 4
-
-	;; flags[6] is set
-	.mmap_length: resd 1
-	; <mb_info.mmap_length>
-	; see <mb_mmap>
-	.mmap_addr: resd 1
-
-	;; flags[7] is set
-	.drives_length: resd 1
-	.drives_addr: resd 1
-
-	;; flags[8] is set
-	.config_table: resd 1
-
-	;; flags[9] is set
-	.bootloader_name: resd 1
-
-	;; flags[10] is set
-	.apm_table: resd 1
-
-	;; 
-	.vbe_control_info: resd 1
-	.vbe_mode_info: resd 1
-	.vbe_mode: resw 1
-	.vbe_interface_seg: resw 1
-	.vbe_interface_off: resw 1
-	.vbe_interface_len: resw 1
-
-	.framebuffer_addr: resq 1
-	.framebuffer_pitch: resd 1
-	.framebuffer_width: resd 1
-	.framebuffer_height: resd 1
-	.framebuffer_bpp: resb 1
-	.framebuffer_type: resb 1
-	.framebuffer_misc: resw 3
-endstruc
-
-; Defines: flags
-; 
-; MB_INFO_MEM     - todo
-; MB_INFO_BOOTDEV - todo 
-MB_INFO_MEM equ 1 << 0
-MB_INFO_BOOTDEV equ 1 << 1
-
-; Structure: mb_mmap
-struc mb_mmap
-	.size: resd 1
-	.addr: resq 1
-	.length: resq 1
-	.type: resd 1
-endstruc
-
-; Defines: types
-;
-; MB_MEMORY_AVAILABLE - 1
-; MB_MEMORY_RESERVED  - 2
-; MB_MEMORY_ACPI      - 3
-; MB_MEMORY_NVS       - 4
-; MB_MEMORY_BADRAM    - 5
-%define MB_MEMORY_AVAILABLE 1
-%define MB_MEMORY_RESERVED 2
-%define MB_MEMORY_ACPI 3
-%define MB_MEMORY_NVS 4
-%define MB_MEMORY_BADRAM 5

kernel/paging.s

@@ -1,34 +0,0 @@
-[BITS 32]
-
-PE_PRESENT equ 1 << 0
-PE_WRITABLE equ 1 << 1
-PE_USERMODE equ 1 << 2
-PE_ACCESSED equ 1 << 5
-PE_DIRTY equ 1 << 6
-
-section .data
-align 4096
-
-page_directory:
-	times 1024 dd 0x00000000
-
-section .text
-
-	; Function: setup_paging
-	; 
-	; in:
-	;     none
-	;
-	; out:
-	;     none
-	;
-global setup_paging
-setup_paging:
-	mov eax, page_directory
-	mov cr3, eax
-
-	mov eax, cr0
-	or eax, 1 << 31				; enable paging
-	mov cr0, eax
-
-	ret

kernel/pic.s

@@ -1,55 +0,0 @@
-; file: pic.s
-;
-[BITS 32]
-
-PIC1_CMD	equ 0x20
-PIC1_DATA	equ 0x21
-PIC2_CMD	equ 0xA0
-PIC2_DATA	equ 0xA1
-
-section .text
-
-	; Function: setup_pic
-	; 
-	; in:
-	;     none
-	;
-	; out:
-	;     none
-	;
-global setup_pic
-setup_pic:
-	mov al, 0x11
-	out PIC1_CMD, al
-	out PIC2_CMD, al
-	
-	mov al, 0x20
-	out PIC1_DATA, al
-	mov al, 0x28
-	out PIC2_DATA, al
-
-	mov al, 4
-	out PIC1_DATA, al
-	mov al, 2
-	out PIC2_DATA, al
-
-	; mask all
-	mov al, 0xFF
-	out PIC1_DATA, al
-	out PIC2_DATA, al
-	ret
-
-	; Function: pic_eoi
-	; 
-	; in:
-	;     none
-	;
-	; out:
-	;     none
-	;
-global pic_eoi
-pic_eoi:
-	mov al, 0x20
-	out PIC2_CMD, al
-	out PIC1_CMD, al
-	ret

kernel/pmm.s

@@ -1,387 +0,0 @@
-; File: pmm.s
-[BITS 32]
-	;; XXX: align address to page
-
-%include "base.inc"
-%include "multiboot.inc"
-
-extern kernel_size
-extern kernel_end
-	
-struc bitmap
-	.length: resd 1
-	.addr: resd 1
-endstruc
-
-section .text
-
-bitmap_count_free_page:
-	push ebp
-	mov ebp, esp
-	push edi
-	push esi
-	push ebx
-
-	mov edi, [bitmap_info + bitmap.addr]
-	xor ebx, ebx
-
-.loop:
-
-	inc edi
-	inc ebx
-	cmp ebx, [bitmap_info]
-	jb .loop
-.end:	
-	pop ebx
-	pop esi
-	pop edi
-	leave
-	ret
-
-bitmap_mark:
-	push ebp
-	mov ebp, esp
-	push edi
-	push esi
-
-	mov edi, 1
-	mov eax, [ebp + 8]
-	and eax, 0x7				; eax % 8
-	mov ecx, eax
-	shl edi, cl
-
-	mov eax, [ebp + 8]
-	shr eax, 0x3				; eax / 8
-	mov esi, [bitmap_info + bitmap.addr]
-	add esi, eax
-	mov dl, byte [esi]
-
-	mov ecx, [ebp + 12]
-	test ecx, ecx
-	jz .clear
-
-	or edx, edi					; set bit
-	jmp .end
-
-.clear:
-	not edi
-	and edx, edi				; clear bit
-
-.end:
-	mov byte [esi], dl
-
-	pop esi
-	pop edi
-	leave
-	ret
-	
-init_bitmap:
-	push ebp
-	mov ebp, esp
-	push edi
-
-	mov ecx, [bitmap_info]
-	mov edi, [bitmap_info + bitmap.addr]
-	rep stosb
-
-	xchg bx, bx
-
-	pop edi
-	leave
-	ret
-
-bitmap_mark_range_free:
-	push ebp
-	mov ebp, esp
-	push edi
-	push esi
-	push ebx
-
-	mov edi, [ebp + 8]			; start address
-	mov esi, [ebp + 12]			; length
-	xor ebx, ebx				; counter (I know I SHOUD use 'ecx' as counter
-								; but since the ABI state it's not preserved
-								; accross function call) 
-	push dword 0				; bitmap_mark(addr, 0) == clear
-.loop:
-	cmp ebx, esi
-	jnb .end_loop
-	add edi, ebx
-	jc .end_loop				; exit on overflow
-	push edi
-	call bitmap_mark
-	add esp, 4
-
-	add ebx, 0x1000				; add page size
-	jmp .loop
-.end_loop:
-	add esp, 4
-	pop ebx
-	pop esi
-	pop edi
-	leave
-	ret
-	
-setup_pmm_mmap:
-	push ebp
-	mov ebp, esp
-	sub esp, 4
-	push edi
-	push esi
-	push ebx
-
-	mov edi, [ebp + 8]			; mb_mmap struct addr
-	mov esi, [ebp + 12]			; mmap length
-	xor ebx, ebx				; pass
-	mov [ebp - 4], ebx			; set max addr to 0
-.loop:
-	;; TODO: PAE stuff
-	;; skip address > 32bit
-	mov eax, [edi + mb_mmap.addr + 4]
-	and eax, eax
-	jnz .next
-	mov eax, [edi + mb_mmap.length + 4]
-	and eax, eax
-	jnz .next
-
-	;; check if first pass
-	and ebx, ebx
-	jz .first_pass
-	mov eax, [edi + mb_mmap.type]
-	and eax, 0x1 				; check if free
-	jz .next
-	;;
-	mov eax, [bitmap_info]
-	mov ecx, [mb_mmap.length]
-	cmp eax, ecx
-	ja .next
-
-	cmp ebx, 0x1
-	jne .third_pass
-	mov eax, [edi + mb_mmap.addr]
-	mov [bitmap_info + bitmap.addr], eax
-	LOG msg_bitmap_stored_at, eax
-	call init_bitmap			; mark all memory as used
-	jmp .bitmap_size_already_set
-	
-	;; TODO: mark as free in bitmap
-.third_pass:
-	push dword [edi + mb_mmap.length]
-	push dword [edi + mb_mmap.addr]
-	call bitmap_mark_range_free
-	add esp, 8
-	jmp .next
-
-	;; first pass then calculate higher address
-.first_pass:
-	LOG msg_mmap_entry, dword [edi + mb_mmap.addr + 4], \
-		dword [edi + mb_mmap.addr], \
-		dword [edi + mb_mmap.length + 4], \
-		dword [edi + mb_mmap.length], \
-		dword [edi + mb_mmap.type]  
-	mov eax, [edi + mb_mmap.length]
-	add eax, [edi + mb_mmap.addr]
-	jnc .no_overflow
-	mov eax, -1					; if overflow set eax to (uint32_t)-1
-.no_overflow:
-	mov edx, [ebp - 4]
-	cmp edx, eax
-	ja .next
-	mov [ebp - 4], eax
-	
-.next:
-	mov eax, [edi + mb_mmap.size]
-	add eax, 0x4
-	add edi, eax				; jump to next entry
-	sub esi, eax
-	jnz .loop
-
-	and ebx, ebx
-	jnz .bitmap_size_already_set
-	LOG msg_max_mem, dword [ebp - 4]
-
-	mov eax, [ebp - 4]
-	shr eax, 15					; eax / (4096*8)
-	mov [bitmap_info], eax
-
-.bitmap_size_already_set:
-	mov edi, [ebp + 8]			; mb_mmap struct addr
-	mov esi, [ebp + 12]			; mmap length
-	inc ebx
-	cmp ebx, 2
-	jbe .loop
-	
-	pop ebx
-	pop esi
-	pop edi
-	leave
-	ret
-
-setup_pmm_legacy:
-	push ebp
-	mov ebp, esp
-	push edi
-	push esi
-	push ebx
-	xor eax, eax
-	mov ecx, [ebp + 8]
-	shl ecx, 0xA				; ecx * 1KiB
-	mov esi, ecx
-	LOG msg_mem_block, eax, ecx
-	
-	mov eax, 0x100000 
-	mov ecx, [ebp + 12]
-	shl ecx, 0xA				; ecx * 1KiB
-	mov ebx, ecx
-	mov edi, eax
-	add edi, ecx
-	LOG msg_mem_block, eax, ecx
-
-	LOG msg_max_mem, edi
-
-	shr edi, 15					; (edi / (4046*8))
-	mov dword [bitmap_info], edi
-
-	cmp edi, esi
-	ja .try_high
-	mov dword [bitmap_info + bitmap.addr], 0
-	jmp .initialize_bitmap
-
-.try_high:
-	mov eax, ebx
-	sub ebx, kernel_size
-	cmp edi, ebx
-	ja .err_no_mem
-	mov dword [bitmap_info + bitmap.addr], kernel_end
-
-.initialize_bitmap:
-	call init_bitmap
-
-	push esi
-	push dword 0
-	call bitmap_mark_range_free
-
-	push ebx
-	push dword 0x100000
-	call bitmap_mark_range_free
-
-	xor eax, eax
-	jmp .end
-	
-.err_no_mem:
-	mov eax, 1
-
-.end:
-	pop ebx
-	pop esi
-	pop edi
-	leave
-	ret
-
-global setup_pmm
-setup_pmm:
-	push ebp
-	mov ebp, esp
-	push edi
-	push esi
-	push ebx
-
-	mov edi, [ebp + 8]
-
-	mov eax, [edi]
-	and eax, 0x40				; (1 << 6)
-	jz .no_mmap
-
-	push dword [edi + mb_info.mmap_length]
-	push dword [edi + mb_info.mmap_addr]
-	call setup_pmm_mmap
-	add esp, 8
-
-	jmp .end_mem_detection
-
-.no_mmap:
-	LOG warn_no_mmap
-	mov eax, [edi]
-	and eax, 0x1
-	jz .err
-
-	push dword [edi + mb_info.mem_upper]
-	push dword [edi + mb_info.mem_lower]
-	call setup_pmm_legacy
-	add esp, 8
-
-.end_mem_detection:
-	;; mark bitmap as used
-	xor ebx, ebx
-	mov edi, [bitmap_info + bitmap.addr]
-	mov esi, [bitmap_info]
-	push dword 1				; bitmap_mark(addr, 1) == set
-
-.loop:
-	cmp ebx, edi
-	jnb .end_loop
-	add edi, ebx
-	push edi
-	call bitmap_mark
-	add esp, 4
-
-	add ebx, 0x1000
-	jmp .loop
-.end_loop:
-	add esp, 4					; previous "push dword 0"
-
-	xor eax, eax
-	jmp .end
-.err:
-	mov eax, 1
-.end:
-	pop ebx
-	pop esi
-	pop ebx
-	leave
-	ret
-
-global alloc_frames
-alloc_frames:
-	push esp
-	mov ebp, esp
-	push edi
-	push esi
-
-	mov edi, [ebp + 8]	; count
-
-	pop esi
-	pop edi
-	leave
-	ret
-
-global free_frames
-free_frames:
-	push esp
-	mov ebp, esp
-
-	call bitmap_mark_range_free
-
-	leave
-	ret
-	
-section .data
-bitmap_info:
-	istruc bitmap
-		at bitmap.length, dd 0
-		at bitmap.addr, dd 0
-	iend
-
-section .rodata
-warn_no_mmap db "[WARN] mmap flag not set", 0
-msg_mmap_entry db "Memory Map Entry:", 0xA
-	db 0x9, "Address: (hi): %x (lo): %x", 0xA
-	db 0x9, "Length: (hi): %x (lo): %x", 0xA
-	db 0x9, "Type: %x", 0
-msg_mem_block db "Free Memory:", 0xA
-	db 0x9, "Address: %x", 0xA
-	db 0x9, "Length: %x", 0
-msg_max_mem db "Max memory: %x", 0
-msg_dump_x db "dump: %x", 0
-msg_bitmap_stored_at db "Bitmap stored at: %x", 0
-file db __FILE__, 0

kernel/syscall.s

@@ -1,11 +0,0 @@
-[BITS 32]
-
-global syscall_table
-syscall_table:
-	dd 0						; sys_exit
-	dd 0						; sys_fork
-	dd 0						; sys_read
-	dd 0						; sys_write
-	dd 0						; sys_open
-	dd 0						; sys_close
-.end:

lib/Makefile

@@ -1,3 +1,11 @@
-SUBDIR = base crypto
+SUBDIRS = crypto
 
-include $(TOPDIR)/share/mk/stupid.subdir.mk
+TOPGOALS = all clean install
+
+.PHONY: $(SUBDIRS)
+$(SUBDIRS):
+	@echo "📁 lib/$@"
+	DESTDIR=$(DESTDIR)/lib $(MAKE) -C $@ $(MAKECMDGOALS)
+
+.PHONY: $(TOPGOALS)
+$(TOPGOALS): $(SUBDIRS)

lib/base.inc

@@ -1,26 +0,0 @@
-; file: base.inc
-
-extern log_impl
-
-; macro: LOG
-; 
-; example:
-; (start code)
-; LOG msg_boot_info, eax
-; (end)
-%macro LOG 1-*
-%ifdef DEBUG
-%rep %0
-%rotate -1
-	push %1
-%endrep
-	push file
-
-	call log_impl
-
-	add esp, 4
-%rep %0
-	add esp, 4
-%endrep
-%endif
-%endmacro

lib/base/Makefile

@@ -1,4 +0,0 @@
-LIB = base
-SRCS = log.s
-
-include $(TOPDIR)/share/mk/stupid.lib.mk

lib/base/log.s

@@ -1,158 +0,0 @@
-; file: log.s
-[BITS 32]
-
-%ifdef __KERNEL__
-extern serial_write
-%endif
-
-section .text
-; Function: putstr
-;
-putstr:
-	push ebp
-	mov ebp, esp
-	push edi
-	mov edi, [ebp + 8]
-
-.loop:
-	mov eax, [edi]
-	cmp al, 0
-	je .end
-	push eax
-%ifdef __KERNEL__
-	call serial_write
-%else
-%endif
-	add esp, 4
-	inc edi
-	jmp .loop
-.end:
-	pop edi
-	leave
-	ret
-
-; Function: puthex
-;
-puthex:
-	push ebp
-	mov ebp, esp
-	push edi
-	push esi
-	mov edi, [ebp + 8] ; number
-	
-	mov eax, hexprefix
-	push hexprefix
-	call putstr
-	add esp, 4
-
-	mov edx, 0xF
-	mov ecx, 0x8
-	mov esi, buffer
-.loop:
-	rol edi, 4
-	mov eax, edi
-	and eax, edx
-	mov al, [digits + eax]
-	mov [esi], al
-	inc esi
-	dec ecx
-	jnz .loop
-
-	mov eax, buffer
-	push eax
-	call putstr
-	add esp, 4
-
-	pop esi
-	pop edi
-	leave
-	ret
-
-; Function: log_impl
-;
-global log_impl
-log_impl:
-	push ebp
-	mov ebp, esp
-	push edi
-	push esi
-	push ebx
-	mov eax, [ebp + 8]
-
-	push eax
-	call putstr
-	add esp, 4
-
-%ifdef __KERNEL__
-	mov eax, ':'
-	push eax
-	call serial_write
-	add esp, 4
-%else
-%endif
-
-	mov edi, [ebp + 12]
-	mov esi, 12
-.loop:
-	mov eax, [edi]
-	cmp al, 0
-	je .end
-	cmp al, '%'
-	jne .putchar
-	inc edi
-	mov eax, [edi]
-	cmp al, '%'
-	je .next
-	cmp al, 'x'
-	jne .check_s
-	add esi, 4
-	mov ebx, ebp
-	add ebx, esi
-	mov eax, [ebx]
-	push eax
-	call puthex
-	add esp, 4
-	jmp .next
-.check_s:
-	cmp al, 's'
-	jne .unknown_format
-	add esi, 4
-	mov ebx, ebp
-	add ebx, esi
-	mov eax, [ebx]
-	push eax
-	call putstr
-	add esp, 4
-	jmp .next
-.unknown_format:
-	mov al, '?'
-.putchar:
-	push eax
-%ifdef __KERNEL__
-	call serial_write
-%else
-	;; TODO
-%endif
-	add esp, 4
-.next:
-	inc edi
-	jmp .loop
-.end:
-
-	;;  print new line
-%ifdef __KERNEL__
-	mov al, 0xA
-	push eax
-	call serial_write
-	add esp, 4
-%else
-%endif
-	pop ebx
-	pop esi
-	pop edi
-	leave
-	ret
-
-digits db '0123456789ABCDEF'
-hexprefix db '0x', 0
-buffer db '00000000', 0

lib/crypto/Makefile

@@ -1,4 +1,5 @@
-LIB		= crypto
-SRCS	= hash/sha256.s
+all:
 
-include $(TOPDIR)/share/mk/stupid.lib.mk
+clean:
+
+install:

share/mk/stupid.clean.mk

@@ -1,5 +0,0 @@
-# File: stupid.clean.mk
-#
-
-clean:
-	$(RM) $(CLEANFILES)

share/mk/stupid.kernel.mk

@@ -1,38 +0,0 @@
-# File: stupid.kernel.mk
-# 
-include $(TOPDIR)/share/mk/stupid.own.mk
-
-ifdef KERNEL
-
-ASFLAGS	+= -D__KERNEL__ -I$(TOPDIR)/kernel
-
-OBJS = $(addsuffix .o, $(basename $(SRCS)))
-OBJS-dbg  = $(addsuffix .dbg.o, $(basename $(SRCS)))
-
-CLEANFILES	+= $(KERNEL) $(KERNEL)-dbg $(OBJS) $(OBJS-dbg)
-
-$(KERNEL): $(OBJS)
-	$(LD) -T $(TOPDIR)/kernel/linker.ld -nostdlib -o $@ $^
-
-$(KERNEL)-dbg: $(OBJS-dbg)
-	$(LD) -T $(TOPDIR)/kernel/linker.ld -nostdlib -o $@ $^
-
-%.o: %.s
-	$(AS) $(ASFLAGS) -o $@ $<
-
-%.dbg.o: %.s
-	$(AS) $(ASFLAGS) $(ASDBGFLAGS) -o $@ $<
-
-lib/%.o: ../lib/base/%.s
-	@$(MKCWD)
-	$(AS) $(ASFLAGS) -o $@ $<
-
-lib/%.dbg.o: ../lib/base/%.s
-	@$(MKCWD)
-	$(AS) $(ASFLAGS) $(ASDBGFLAGS) -o $@ $<
-
-all: $(KERNEL) $(KERNEL)-dbg
-
-endif
-
-include $(TOPDIR)/share/mk/stupid.clean.mk

share/mk/stupid.lib.mk

@@ -1,33 +0,0 @@
-# File: stupid.lib.mk
-# Support for building libraries
-
-include $(TOPDIR)/share/mk/stupid.own.mk
-
-ifdef LIB
-
-CLEANFILES += lib$(LIB).a
-
-ifdef SRCS
-
-OBJS	+= $(addsuffix .o, $(basename $(SRCS)))
-
-CLEANFILES	+= $(OBJS)
-
-lib$(LIB).a: $(OBJS)
-	$(AR) rcs $@ $^
-
-else
-
-CLEANFILES += $(LIB).o
-
-lib$(LIB).a: $(LIB).o
-	$(AR) rcs $@ $^
-
-endif
-
-all: lib$(LIB).a
-
-endif
-
-include $(TOPDIR)/share/mk/stupid.clean.mk
-include $(TOPDIR)/share/mk/stupid.sys.mk

share/mk/stupid.own.mk

@@ -1,32 +0,0 @@
-# File: stupid.own.mk
-# Define common variables
-ifndef _STUPID_OWN_MK_
-_STUPID_OWN_MK_=1
-
-.DEFAULT_GOAL := all
-
-BINDIR	= /bin
-LIBDIR	= /lib
-
-CC		= clang -target i386-none-elf
-CXX		= clang++ -target i386-none-elf
-
-AS		= nasm
-LD		= ld.lld
-PLSCC	= plsc
-OBJCOPY	= llvm-objcopy
-OBJDUMP = llvm-objdump
-
-MKCWD	= mkdir -p $(@D)
-
-TARGETS	= all clean install
-.PHONY: $(TARGETS)
-
-EXTRAFLAGS	= -DSTUPID_VERSION="0.0" -D__STUPID__
-
-CFLAGS		+= -Wall -Werror -Wextra $(EXTRAFLAGS)
-CXXFLAGS	+= -Wall -Werror -Wextra $(EXTRAFLAGS)
-ASFLAGS		+= -felf -I$(TOPDIR)/lib $(EXTRAFLAGS)
-ASDBGFLAGS	+=  -F dwarf -g -DDEBUG
-
-endif

share/mk/stupid.prog.mk

@@ -1,41 +0,0 @@
-# File: stupid.prog.mk
-# Building programs from source files
-#
-# targets:
-# - all:
-#   	build the program and its manual page.
-# - clean:
-#   	remove the program and any object files.
-# - install:
-#		install the program and its manual page.
-
-include $(TOPDIR)/share/mk/stupid.own.mk
-
-ifdef PROG
-
-CLEANFILES += $(PROG)
-
-ifdef SRCS
-
-OBJS	+= $(addsuffix .o, $(basename $(SRCS)))
-
-CLEANFILES += $(OBJS)
-
-$(PROG): $(OBJS)
-	$(CC) $(CFLAGS) -o $@ $^ $(LDADD)
-
-else
-
-CLEANFILES += $(PROG).o
-
-$(PROG): $(PROG).o
-	$(CC) $(CFLAGS) -o $@ $< $(LDADD)
-
-endif
-
-all: $(PROG)
-
-endif
-
-include $(TOPDIR)/share/mk/stupid.clean.mk
-include $(TOPDIR)/share/mk/stupid.sys.mk

share/mk/stupid.subdir.mk

@@ -1,20 +0,0 @@
-# File: stupid.subdir.mk
-# Targets for building subdirectories
-
-.DEFAULT_GOAL := all
-TOPGOALS = all clean install
-
-ifndef NOSUBDIR
-
-.PHONY: $(SUBDIR)
-$(SUBDIR):
-	$(MAKE) -C $@ $(MAKECMDGOALS)
-
-$(TOPGOALS): $(SUBDIR)
-
-else
-
-# ensure target exist
-$(TOPGOALS):
-
-endif

share/mk/stupid.sys.mk

@@ -1,19 +0,0 @@
-# File: stupid.sys.mk
-
-%.o: %.c
-	$(CC) -c -o $@ $< $(CFLAGS)
-
-%.o: %.cc
-	$(CXX) -c -o $@ $< $(CXXFLAGS)
-
-%.o: %.cpp
-	$(CXX) -c -o $@ $< $(CXXFLAGS)
-
-%.o: %.cxx
-	$(CXX) -c -o $@ $< $(CXXFLAGS)
-
-%.o: %.C
-	$(CXX) -c -o $@ $< $(CXXFLAGS)
-
-%.o: %.s
-	$(AS) $(ASFLAGS) -o $@ $<

thirdparty/Makefile

@@ -1,3 +0,0 @@
-NOSUBDIR := 1
-
-include $(TOPDIR)/share/mk/stupid.subdir.mk

tools/create-iso

@@ -12,20 +12,13 @@ menuentry "StupidOS" {
    boot
 }
 
-menuentry "StupidOS (debug)" {
-	hashsum --hash sha256 --check /boot/hashfile --prefix /
-	multiboot /vmstupid-dbg "lang=en"
-	boot
-}
-
 EOF
 )
 
 gen_iso_file() {
 	mkdir -p "$2/boot/grub"
 	echo "$grub_config" > "$2/boot/grub/grub.cfg"
-	sha256sum vmstupid > "$2/boot/hashfile"
-	sha256sum vmstupid-dbg >> "$2/boot/hashfile"
+	sha256sum "$2/vmstupid" > "$2/boot/hashfile"
 
 	grub-mkrescue -o $1 $2
 }