├── LICENSE ├── README.md ├── imgfile └── myos.iso └── src ├── Makefile ├── arch ├── gdt.c ├── gdt.s ├── idt.c ├── idt.s └── pic.c ├── boot.s ├── drivers ├── keyboard.c ├── keymap.c └── terminal.c ├── include ├── do_read.h ├── do_write.h ├── gdt.h ├── get_ksize.h ├── get_mmap.h ├── idt.h ├── inb_outb.h ├── init_pmemory.h ├── init_vmemory.h ├── interrupt.h ├── kernel.h ├── keyboard.h ├── multiboot.h ├── pic.h ├── pmalloc.h ├── syscall.h ├── syscallnum.h ├── terminal.h └── vga.h ├── isodir └── boot │ └── grub │ └── grub.cfg ├── kernel ├── do_read.c ├── do_write.c ├── interrupt.c ├── interrupt.s ├── kernel.c └── syscall.c ├── linker.ld ├── memory ├── get_ksize.c ├── get_mmap.c ├── init_pmemory.c ├── init_vmemory.c ├── paging.s └── pmalloc.c └── sh_libc ├── include ├── io.h ├── math.h ├── stdio.h ├── stdlib.h ├── string.h └── sysdep.h ├── io.c ├── math.c ├── stdio.c ├── stdlib.c ├── string.c └── sysdep.c /LICENSE: -------------------------------------------------------------------------------- 1 | GNU GENERAL PUBLIC LICENSE 2 | Version 2, June 1991 3 | 4 | Copyright (C) 1989, 1991 Free Software Foundation, Inc., 5 | 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA 6 | Everyone is permitted to copy and distribute verbatim copies 7 | of this license document, but changing it is not allowed. 8 | 9 | Preamble 10 | 11 | The licenses for most software are designed to take away your 12 | freedom to share and change it. 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It is safest 289 | to attach them to the start of each source file to most effectively 290 | convey the exclusion of warranty; and each file should have at least 291 | the "copyright" line and a pointer to where the full notice is found. 292 | 293 | {description} 294 | Copyright (C) {year} {fullname} 295 | 296 | This program is free software; you can redistribute it and/or modify 297 | it under the terms of the GNU General Public License as published by 298 | the Free Software Foundation; either version 2 of the License, or 299 | (at your option) any later version. 300 | 301 | This program is distributed in the hope that it will be useful, 302 | but WITHOUT ANY WARRANTY; without even the implied warranty of 303 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 304 | GNU General Public License for more details. 305 | 306 | You should have received a copy of the GNU General Public License along 307 | with this program; if not, write to the Free Software Foundation, Inc., 308 | 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. 309 | 310 | Also add information on how to contact you by electronic and paper mail. 311 | 312 | If the program is interactive, make it output a short notice like this 313 | when it starts in an interactive mode: 314 | 315 | Gnomovision version 69, Copyright (C) year name of author 316 | Gnomovision comes with ABSOLUTELY NO WARRANTY; for details type `show w'. 317 | This is free software, and you are welcome to redistribute it 318 | under certain conditions; type `show c' for details. 319 | 320 | The hypothetical commands `show w' and `show c' should show the appropriate 321 | parts of the General Public License. Of course, the commands you use may 322 | be called something other than `show w' and `show c'; they could even be 323 | mouse-clicks or menu items--whatever suits your program. 324 | 325 | You should also get your employer (if you work as a programmer) or your 326 | school, if any, to sign a "copyright disclaimer" for the program, if 327 | necessary. Here is a sample; alter the names: 328 | 329 | Yoyodyne, Inc., hereby disclaims all copyright interest in the program 330 | `Gnomovision' (which makes passes at compilers) written by James Hacker. 331 | 332 | {signature of Ty Coon}, 1 April 1989 333 | Ty Coon, President of Vice 334 | 335 | This General Public License does not permit incorporating your program into 336 | proprietary programs. If your program is a subroutine library, you may 337 | consider it more useful to permit linking proprietary applications with the 338 | library. If this is what you want to do, use the GNU Lesser General 339 | Public License instead of this License. 340 | -------------------------------------------------------------------------------- /README.md: -------------------------------------------------------------------------------- 1 | # 自作OS(仮称) 2 | x86 32bit なOSです。 3 | 4 | ## 開発環境 5 | OS : Linux(CentOS7.1) 6 | 使用プログラミング言語 : C, GNU Assembler 7 | GCC バージョン : gcc version 6.3.0 8 | 9 | 記事毎に使用したソースコードと解説記事は[Releases](https://github.com/Shadow5523/osdev/releases)から参照することができる。 10 | 11 | ## コンパイル 12 | ※クロスコンパイラの導入方法は下記記事を参照。 13 | [OSを自作してみる1 ～Linuxで自作OSを作る環境を構築する～](https://zeus.shadow-net.jp/?p=118) 14 | 15 | 1.osdevレポジトリをcloneする。 16 | git clone https://github.com/Shadow5523/osdev.git 17 | 18 | 2.ソースコードのディレクトリへ移動 19 | cd osdev/src 20 | 21 | 3.makeを使用してコンパイルする。同じディレクトリに出来る"myos.iso"がOSのイメージファイルとなる。 22 | make 23 | 24 | 4.make cleanでオブジェクトファイルを消すことが出来る。 25 | make clean 26 | 27 | 28 | ## コンパイル済イメージファイル 29 | 最新版のイメージファイルを以下に配置しておきます。 30 | [myos.iso](/imgfile) 31 | 32 | 33 | ## 参考資料 34 | [OSDev.org](http://wiki.osdev.org/Main_Page) 35 | [０から作るソフトウェア開発](http://softwaretechnique.jp/OS_Development/scratchbuild.html) 36 | [30日でできる！　OS自作入門](https://books.google.co.jp/books/about/30%E6%97%A5%E3%81%A7%E3%81%A7%E3%81%8D%E3%82%8B_OS%E8%87%AA%E4%BD%9C%E5%85%A5%E9%96%80.html?id=ilSvAgAAQBAJ&source=kp_cover&redir_esc=y) 37 | [OSのようなもの](http://d.hatena.ne.jp/wocota/searchdiary?word=%2A%5B%BC%AB%BA%EEOS%5D) 38 | [システムコールの呼び出し方メモ](https://qiita.com/kure/items/5a1a114f9a37aeab255c) 39 | [x86_64環境でシステムコールを発行する](http://sugawarayusuke.hatenablog.com/entry/2016/04/22/213251) 40 | 41 |
-------------------------------------------------------------------------------- /imgfile/myos.iso: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/Shadow5523/osdev/8b74fb110f8dea006d232ecd87547d31852c9d6e/imgfile/myos.iso -------------------------------------------------------------------------------- /src/Makefile: -------------------------------------------------------------------------------- 1 | all: create 2 | OBJ = kernel.o terminal.o boot.o inb_outb.o keyboard.o \ 3 | keymap.o gdt.o idt.o pic.o interrupt.o stdio.o \ 4 | stdlib.o string.o math.o get_mmap.o io.o sysdep.o \ 5 | syscall.o getksize.o do_write.o do_read.o init_pmemory.o pmalloc.o\ 6 | init_vmemory.o 7 | 8 | OBJAS = interruptas.o idts.o gdts.o boot.o paging.o 9 | 10 | 11 | CC = i686-elf-gcc 12 | CCAS = i686-elf-as 13 | CFLAGS = -ffreestanding -O2 -Wall 14 | 15 | 16 | INCLUDEDIR = include/ 17 | ARCHDIR = arch/ 18 | DRVDIR = drivers/ 19 | KRNDIR = kernel/ 20 | SHLIBC = sh_libc/ 21 | SHLIBCINC = sh_libc/include/ 22 | MEMDIR = memory/ 23 | 24 | 25 | interruptas.o: $(KRNDIR)interrupt.s 26 | $(CCAS) $< -o interruptas.o 27 | 28 | idts.o: $(ARCHDIR)idt.s 29 | $(CCAS) $< -o idts.o 30 | 31 | gdts.o: $(ARCHDIR)gdt.s 32 | $(CCAS) $< -o gdts.o 33 | 34 | boot.o: boot.s 35 | $(CCAS) $< -o boot.o 36 | 37 | paging.o: $(MEMDIR)paging.s 38 | $(CCAS) $< -o paging.o 39 | 40 | interrupt.o: $(KRNDIR)interrupt.c $(INCLUDEDIR)interrupt.h 41 | $(CC) -c $^ -std=gnu99 $(CFLAGS) -Wextra 42 | 43 | pic.o: $(ARCHDIR)pic.c $(INCLUDEDIR)pic.h 44 | $(CC) -c $^ -std=gnu99 $(CFLAGS) -Wextra 45 | 46 | idt.o: $(ARCHDIR)idt.c $(INCLUDEDIR)idt.h 47 | $(CC) -c $^ -std=gnu99 $(CFLAGS) -Wextra 48 | 49 | gdt.o: $(ARCHDIR)gdt.c $(INCLUDEDIR)gdt.h 50 | $(CC) -c $^ -std=gnu99 $(CFLAGS) -Wextra 51 | 52 | inb_outb.o: $(INCLUDEDIR)inb_outb.h 53 | $(CC) -c $^ -std=gnu99 $(CFLAGS) -Wextra 54 | 55 | keymap.o: $(DRVDIR)keymap.c $(INCLUDEDIR)keyboard.h 56 | $(CC) -c $^ -std=gnu99 $(CFLAGS) -Wextra 57 | 58 | keyboard.o: $(DRVDIR)keyboard.c $(INCLUDEDIR)keyboard.h 59 | $(CC) -c $^ -std=gnu99 $(CFLAGS) -Wextra 60 | 61 | terminal.o: $(DRVDIR)terminal.c $(INCLUDEDIR)terminal.h $(INCLUDEDIR)vga.h 62 | $(CC) -c $^ -std=gnu99 $(CFLAGS) -Wextra 63 | 64 | kernel.o: $(KRNDIR)kernel.c $(INCLUDEDIR)kernel.h $(INCLUDEDIR)multiboot.h 65 | $(CC) -c $^ -std=gnu99 $(CFLAGS) -Wextra 66 | 67 | syscall.o: $(KRNDIR)syscall.c $(INCLUDEDIR)syscall.h $(INCLUDEDIR)syscallnum.h 68 | $(CC) -c $^ -std=gnu99 $(CFLAGS) -Wextra 69 | 70 | do_write.o: $(KRNDIR)do_write.c $(INCLUDEDIR)do_write.h 71 | $(CC) -c $^ -std=gnu99 $(CFLAGS) -Wextra 72 | 73 | do_read.o: $(KRNDIR)do_read.c $(INCLUDEDIR)do_read.h 74 | $(CC) -c $^ -std=gnu99 $(CFLAGS) -Wextra 75 | 76 | stdio.o: $(SHLIBC)stdio.c $(SHLIBCINC)stdio.h 77 | $(CC) -c $^ -std=gnu99 $(CFLAGS) -Wextra 78 | 79 | stdlib.o: $(SHLIBC)stdlib.c $(SHLIBCINC)stdlib.h 80 | $(CC) -c $^ -std=gnu99 $(CFLAGS) -Wextra 81 | 82 | string.o: $(SHLIBC)string.c $(SHLIBCINC)string.h 83 | $(CC) -c $^ -std=gnu99 $(CFLAGS) -Wextra 84 | 85 | math.o: $(SHLIBC)math.c $(SHLIBCINC)math.h 86 | $(CC) -c $^ -std=gnu99 $(CFLAGS) -Wextra 87 | 88 | io.o: $(SHLIBC)io.c $(SHLIBCINC)io.h 89 | $(CC) -c $^ -std=gnu99 $(CFLAGS) -Wextra 90 | 91 | sysdep.o: $(SHLIBC)sysdep.c $(SHLIBCINC)sysdep.h 92 | $(CC) -c $^ -std=gnu99 $(CFLAGS) -Wextra 93 | 94 | get_mmap.o: $(MEMDIR)get_mmap.c $(INCLUDEDIR)get_mmap.h 95 | $(CC) -c $^ -std=gnu99 $(CFLAGS) -Wextra 96 | 97 | getksize.o: $(MEMDIR)get_ksize.c $(INCLUDEDIR)get_ksize.h 98 | $(CC) -c $^ -std=gnu99 $(CFLAGS) -Wextra 99 | 100 | init_pmemory.o: $(MEMDIR)init_pmemory.c $(INCLUDEDIR)init_pmemory.h 101 | $(CC) -c $^ -std=gnu99 $(CFLAGS) -Wextra 102 | 103 | init_vmemory.o: $(MEMDIR)init_vmemory.c $(INCLUDEDIR)init_vmemory.h 104 | $(CC) -c $^ -std=gnu99 $(CFLAGS) -Wextra 105 | 106 | pmalloc.o: $(MEMDIR)pmalloc.c $(INCLUDEDIR)pmalloc.h 107 | $(CC) -c $^ -std=gnu99 $(CFLAGS) -Wextra 108 | 109 | create: $(OBJAS) $(OBJ) 110 | $(CC) -T linker.ld -o myos.bin $(CFLAGS) -nostdlib *.o -lgcc 111 | grub2-file --is-x86-multiboot myos.bin 112 | \cp -f myos.bin isodir/boot/myos.bin 113 | grub2-mkrescue -o myos.iso isodir 114 | 115 | clean: 116 | rm -f *.o myos.bin myos.iso isodir/boot/myos.bin 117 | rm -f ./*~ $(ARCHDIR)*~ $(INCLUDEDIR)*~ $(SHLIBCINC)*~ $(MEMDIR)*~ \ 118 | $(KRNDIR)*~ 119 | rm -f $(SHLIBCINC)*gch $(INCLUDEDIR)*gch 120 | -------------------------------------------------------------------------------- /src/arch/gdt.c: -------------------------------------------------------------------------------- 1 | #include "../include/gdt.h" 2 | 3 | void gdt_init(void){ 4 | gdtr gdt; 5 | terminal_writestring("Initialize GDT..."); 6 | for (size_t i = 0; i < GDT_LEN; i++) { 7 | set_segment_desc(i, 0, 0, 0, 0); 8 | } 9 | set_segment_desc(1, 0, 0xffffffff, 0x9a, 0xcf); 10 | set_segment_desc(2, 0, 0xffffffff, 0x92, 0xcf); 11 | set_segment_desc(3, 0, 0xffffffff, 0xfa, 0xcf); 12 | set_segment_desc(4, 0, 0xffffffff, 0xf2, 0xcf); 13 | 14 | gdt.gdt_size = GDT_LEN * sizeof(gdt_desc) - 1; 15 | gdt.base = (uint32_t)gdt_entries; 16 | load_gdtr((uint32_t)(&gdt)); 17 | terminal_writestring(" OK!\n"); 18 | } 19 | 20 | 21 | void set_segment_desc(uint32_t index, uint32_t base, uint32_t limit, uint8_t s_access, uint8_t gran){ 22 | gdt_desc * sd = &gdt_entries[index]; 23 | sd -> base_high = (base >> 24 & 0xff); 24 | sd -> base_low = base & 0xffff; 25 | sd -> base_mid = (base >> 16) & 0xff; 26 | sd -> s_access = s_access; 27 | sd -> limit_low = limit & 0xffff; 28 | sd -> limit_high = ((limit >> 16) & 0x0f) | (gran & 0xf0); 29 | } 30 | -------------------------------------------------------------------------------- /src/arch/gdt.s: -------------------------------------------------------------------------------- 1 | .global load_gdtr 2 | 3 | load_gdtr: 4 | movl 4(%esp), %eax 5 | lgdt (%eax) 6 | 7 | mov %cr0, %eax 8 | or $1, %eax 9 | mov %eax, %cr0 10 | 11 | mov $0x10, %ax 12 | mov %ax, %ds 13 | mov %ax, %es 14 | mov %ax, %fs 15 | mov %ax, %gs 16 | mov %ax, %ss 17 | 18 | jmp $0x08, $gdt_flush 19 | gdt_flush: 20 | ret 21 | -------------------------------------------------------------------------------- /src/arch/idt.c: -------------------------------------------------------------------------------- 1 | #include "../include/idt.h" 2 | 3 | void idt_init(void){ 4 | idtr idt; 5 | terminal_writestring("Initialize IDT..."); 6 | for (size_t i = 0; i < IDT_LEN; i++) { 7 | set_gate_desc(i, 0, 0, 0); 8 | } 9 | 10 | set_gate_desc(33, (uint32_t)as_keyboard_interrupt, 0x08, 0x8e); 11 | set_gate_desc(128, (uint32_t)as_software_interrupt, 0x08, 0x8f); 12 | 13 | idt.idt_size = IDT_LEN * sizeof(gate_desc) - 1; 14 | idt.base = (uint32_t)idt_entries; 15 | load_idtr((uint32_t)&(idt)); 16 | terminal_writestring(" OK!\n"); 17 | } 18 | 19 | 20 | void set_gate_desc(uint32_t index, uint32_t offset, uint32_t selector, uint8_t ar){ 21 | gate_desc *gd = &idt_entries[index]; 22 | gd -> offset_low = offset & 0xffff; 23 | gd -> offset_high = (offset >> 16) & 0xffff; 24 | gd -> dw_count = 0; 25 | gd -> selector = selector; 26 | gd -> s_access = ar | 0x60; 27 | } 28 | -------------------------------------------------------------------------------- /src/arch/idt.s: -------------------------------------------------------------------------------- 1 | .global load_idtr 2 | 3 | load_idtr: 4 | mov 4(%esp), %eax 5 | lidt (%eax) 6 | ret 7 | -------------------------------------------------------------------------------- /src/arch/pic.c: -------------------------------------------------------------------------------- 1 | #include "../include/pic.h" 2 | 3 | void pic_init(void){ 4 | terminal_writestring("Initialize PIC..."); 5 | 6 | outb(MASTER_PIC_MASK_DATA, CLEAR_MASK); 7 | outb(SLAVE_PIC_MASK_DATA, CLEAR_MASK); 8 | 9 | outb(MASTER_PIC_CMD_STAT, WRITE_ICW1); 10 | outb(SLAVE_PIC_CMD_STAT, WRITE_ICW1); 11 | 12 | outb(MASTER_PIC_MASK_DATA, WRITE_ICW2_M); 13 | outb(SLAVE_PIC_MASK_DATA, WRITE_ICW2_S); 14 | 15 | outb(MASTER_PIC_MASK_DATA, WRITE_ICW3_M); 16 | outb(SLAVE_PIC_MASK_DATA, WRITE_ICW3_S); 17 | 18 | outb(MASTER_PIC_MASK_DATA, WRITE_ICW4_X86MODE); 19 | outb(SLAVE_PIC_MASK_DATA, WRITE_ICW4_X86MODE); 20 | 21 | outb(MASTER_PIC_MASK_DATA, 0xf9); 22 | outb(SLAVE_PIC_MASK_DATA, 0xef); 23 | 24 | terminal_writestring(" OK!\n"); 25 | } 26 | -------------------------------------------------------------------------------- /src/boot.s: -------------------------------------------------------------------------------- 1 | .set ALIGN, 1<<0 2 | .set MEMINFO, 1<<1 3 | .set FLAGS, ALIGN | MEMINFO 4 | .set MAGIC, 0x1BADB002 5 | .set CHECKSUM, -(MAGIC + FLAGS) 6 | 7 | .set KERNEL_VBASE, 0xC0000000 8 | .set KERNEL_PNUM, (KERNEL_VBASE >> 22) 9 | 10 | //初期のカーネルスタックサイズを確保する(16KB) 11 | .set STACKSIZE, 0x4000 12 | 13 | .section .data 14 | .balign 0x1000 15 | 16 | //ページディレクトリ作成 17 | _boot_pd: 18 | .long 0x00000083 19 | .fill (KERNEL_PNUM - 1), 4, 0x00000000 20 | 21 | .long 0x00000083 22 | .fill (1024 - KERNEL_PNUM - 1), 4, 0x00000000 23 | 24 | .section .multiboot 25 | .balign 4 26 | .long MAGIC 27 | .long FLAGS 28 | .long CHECKSUM 29 | 30 | .section .text 31 | .global _loader 32 | 33 | _loader: 34 | movl $(_boot_pd - KERNEL_VBASE), %ecx 35 | movl %ecx, %cr3 36 | 37 | // pse bit set 38 | movl %cr4, %ecx 39 | orl $0x00000010, %ecx 40 | movl %ecx, %cr4 41 | 42 | // enable paging 43 | movl %cr0, %ecx 44 | orl $0x80000000, %ecx 45 | movl %ecx, %cr0 46 | 47 | leal (_start), %ecx 48 | jmp *%ecx 49 | 50 | .type _start, @function 51 | _start: 52 | movl $0, (_boot_pd) 53 | 54 | // TLB Flush 55 | invlpg (0) 56 | 57 | movl $stack_top, %esp 58 | addl $KERNEL_VBASE, %ebx 59 | pushl %eax 60 | pushl %ebx 61 | 62 | call kernel_main 63 | cli 64 | 65 | 1: hlt 66 | jmp 1b 67 | 68 | .size _start, . - _start 69 | 70 | .section .bss 71 | .balign 32 72 | stack_bottom: 73 | .skip STACKSIZE 74 | stack_top: 75 | -------------------------------------------------------------------------------- /src/drivers/keyboard.c: -------------------------------------------------------------------------------- 1 | #include "../include/keyboard.h" 2 | #include "../include/inb_outb.h" 3 | 4 | key_buf kb; 5 | 6 | void key_init(void){ 7 | change_trate_delay(TYPEMATICDELEY_SET11); 8 | if (enable_keyboard() == 0xFA) { 9 | terminal_writestring("Keyboard enable OK\n"); 10 | } 11 | if (!ps2_kerboard_init()) { 12 | terminal_writestring("PS/2 Keyboard init OK\n"); 13 | } 14 | } 15 | 16 | 17 | uint8_t ps2_kerboard_init(void){ 18 | uint8_t scodeset = getscodeset(); 19 | if (scodeset == 0x43) { 20 | terminal_writestring("Current Scan code set 1\nCorrection to Scan code set2\n"); 21 | change_codeset(SCAN_CODE_SET2); 22 | } else if (scodeset == 0x41) { 23 | terminal_writestring("Scan code set 2\n"); 24 | } else if (scodeset == 0x3f) { 25 | terminal_writestring("Current Scan code set 3\nCorrection to Scan code set2\n"); 26 | change_codeset(SCAN_CODE_SET2); 27 | } else { 28 | terminal_writestring("Unknown scan code set\nPS/2 Emulation?\n"); 29 | return 1; 30 | } 31 | return 0; 32 | } 33 | 34 | 35 | void select_keymode(uint8_t scan_code){ 36 | if (kb.len < 128) { 37 | if (scan_code == L_SHIFT || scan_code == R_SHIFT) { 38 | ks.shift_enable = true; 39 | } else if (scan_code == CAPS_LOCK && !ks.caps_lock) { 40 | ks.caps_lock = true; 41 | ks.led_stat += SET_CAPSLOCK_LED; 42 | switch_kb_led(ks.led_stat); 43 | } else if (scan_code == CAPS_LOCK && ks.caps_lock) { 44 | ks.caps_lock = false; 45 | ks.led_stat -= SET_CAPSLOCK_LED; 46 | switch_kb_led(ks.led_stat); 47 | } else if (scan_code == NUM_LOCK && !ks.num_lock) { 48 | ks.num_lock = true; 49 | ks.led_stat += SET_NUMLOCK_LED; 50 | switch_kb_led(ks.led_stat); 51 | } else if (scan_code == NUM_LOCK && ks.num_lock) { 52 | ks.num_lock = false; 53 | ks.led_stat -= SET_NUMLOCK_LED; 54 | switch_kb_led(ks.led_stat); 55 | } else if (scan_code == SCROLL_LOCK && !ks.scr_lock) { 56 | ks.scr_lock = true; 57 | ks.led_stat += SET_SCROLLLOCK_LED; 58 | switch_kb_led(ks.led_stat); 59 | } else if (scan_code == SCROLL_LOCK && ks.scr_lock) { 60 | ks.scr_lock = false; 61 | ks.led_stat -= SET_SCROLLLOCK_LED; 62 | switch_kb_led(ks.led_stat); 63 | } else { 64 | input_bufdata(scan_code); 65 | ++kb.len; 66 | if (kb.write == 128) { kb.write = 0; } 67 | } 68 | } 69 | } 70 | 71 | 72 | void keyboard_input_int(uint8_t scan_code){ 73 | if (scan_code == 0xE0) { 74 | if (!ext_input) { 75 | ext_input = true; 76 | } else { 77 | ext_input = false; 78 | } 79 | } 80 | if (scan_code <= 0x80) { 81 | select_keymode(scan_code); 82 | } else { 83 | scan_code -= 0x80; 84 | if (scan_code == L_SHIFT || scan_code == R_SHIFT) { 85 | ks.shift_enable = false; 86 | } 87 | } 88 | } 89 | 90 | 91 | void switch_kb_led(uint8_t set_led){ 92 | while (inb(PORTMAP_KEYBOARD2) & 0x02); 93 | outb(PORTMAP_KEYBOARD1, SWITCH_LED); 94 | while (inb(PORTMAP_KEYBOARD2) & 0x02); 95 | outb(PORTMAP_KEYBOARD1, set_led); 96 | } 97 | 98 | 99 | uint8_t enable_keyboard(void){ 100 | outb(PORTMAP_KEYBOARD1, ENABLE_KEYBOARD); 101 | return getscode(); 102 | } 103 | 104 | 105 | uint8_t getscodeset(void){ 106 | while (inb(PORTMAP_KEYBOARD2) & 0x02); 107 | outb(PORTMAP_KEYBOARD1, SET_SCANCODESET); 108 | if (getscode() == 0xFA) { 109 | while (inb(PORTMAP_KEYBOARD2) & 0x02); 110 | outb(PORTMAP_KEYBOARD1, 0x00); 111 | return getscode(); 112 | } else { 113 | return 0x00; 114 | } 115 | } 116 | 117 | 118 | uint8_t getscode(void){ 119 | uint8_t c = 0; 120 | do { 121 | if (inb(PORTMAP_KEYBOARD1) != c) { 122 | c = inb(PORTMAP_KEYBOARD1); 123 | if (c > 0) return c; 124 | } 125 | } while (1); 126 | } 127 | 128 | 129 | void change_codeset(uint8_t set){ 130 | outb(PORTMAP_KEYBOARD1, SET_SCANCODESET); 131 | outb(PORTMAP_KEYBOARD1, set); 132 | } 133 | 134 | 135 | void change_trate_delay(uint8_t set){ 136 | while (inb(PORTMAP_KEYBOARD2) & 0x02); 137 | outb(PORTMAP_KEYBOARD1, SET_TYPEMATIC_RATE); 138 | while (inb(PORTMAP_KEYBOARD2) & 0x02); 139 | outb(PORTMAP_KEYBOARD1, set); 140 | } 141 | 142 | 143 | void input_bufdata(uint8_t scan_code){ 144 | const keymap *key = &key_code; 145 | uint8_t numpad_data = 0; 146 | 147 | if (ks.num_lock) { 148 | numpad_data = key -> numlock[scan_code]; 149 | ext_input = false; 150 | } 151 | 152 | if (!numpad_data) { 153 | if (ext_input && scan_code == 0x35) { 154 | kb.pdata[kb.write++] = '\0'; 155 | } else if (ks.shift_enable && !ks.caps_lock) { 156 | kb.pdata[kb.write++] = key -> shift[scan_code]; 157 | } else if (!ks.shift_enable && ks.caps_lock) { 158 | if ((numpad_data = key -> base[scan_code]) >= 'a' && numpad_data <= 'z') { 159 | kb.pdata[kb.write++] = key -> shift[scan_code]; 160 | } else { 161 | kb.pdata[kb.write++] = key -> base[scan_code]; 162 | } 163 | } else if (ks.shift_enable && ks.caps_lock) { 164 | if ((numpad_data = key -> base[scan_code]) >= 'a' && numpad_data <= 'z') { 165 | kb.pdata[kb.write++] = key -> base[scan_code]; 166 | } else { 167 | kb.pdata[kb.write++] = key -> shift[scan_code]; 168 | } 169 | } else { 170 | kb.pdata[kb.write++] = key -> base[scan_code]; 171 | } 172 | } else { 173 | kb.pdata[kb.write++] = numpad_data; 174 | } 175 | } 176 | -------------------------------------------------------------------------------- /src/drivers/keymap.c: -------------------------------------------------------------------------------- 1 | #include "../include/keyboard.h" 2 | 3 | const keymap key_code = { 4 | .base = { 5 | '0', '0', '1', '2', '3', '4', '5', '6', '7', '8', 6 | '9', '0', '-', '=', '\b', '\t', 'q', 'w', 'e', 'r', 7 | 't', 'y', 'u', 'i', 'o', 'p', '[', ']', '\n', '0', 8 | 'a', 's', 'd', 'f', 'g', 'h', 'j', 'k', 'l', ';', 9 | '\'', '`', '0', '\\', 'z', 'x', 'c', 'v', 'b', 'n', 10 | 'm', ',', '.', '/', '0', '\0', '0', ' ', '0', '0', 11 | '0', '0', '0', '0', '0', '0', '0', '0', '0', '0', 12 | '\0', '\0', '\0', '\0', '\0', '\0', '\0', '\0', '\0', '\0', 13 | '\0', '\0', '0', '\0', '0', '0', '0', '0', '0', '0', 14 | '0', '0', '0', '0', '0', '0', '0', '0', '0', '0', 15 | '0', '0', '0', '0', '0', '0', '0', '0', '0', '0', 16 | '0', '0', '0', '0', '0', '0', '0', '0', '0', '0', 17 | '0', '0', '0', '0', '0', '0', '0', '0'}, 18 | 19 | .shift = { 20 | '0', '0', '!', '@', '#', '$', '%', '^', '&', '*', 21 | '(', ')', '_', '+', '\b', '\t', 'Q', 'W', 'E', 'R', 22 | 'T', 'Y', 'U', 'I', 'O', 'P', '{', '}', '\n', '0', 23 | 'A', 'S', 'D', 'F', 'G', 'H', 'J', 'K', 'L', ':', 24 | '"', '~', '0', '|', 'Z', 'X', 'C', 'V', 'B', 'N', 25 | 'M', '<', '>', '?', '0', '\0', '0', ' ', '0', '0', 26 | '0', '0', '0', '0', '0', '0', '0', '0', '0', '0', 27 | '\0', '\0', '\0', '\0', '\0', '\0', '\0', '\0', '\0', '\0', 28 | '\0', '\0', '0', '\0', '0', '0', '0', '0', '0', '0', 29 | '0', '0', '0', '0', '0', '0', '0', '0', '0', '0', 30 | '0', '0', '0', '0', '0', '0', '0', '0', '0', '0', 31 | '0', '0', '0', '0', '0', '0', '0', '0', '0', '0', 32 | '0', '0', '0', '0', '0', '0', '0', '0'}, 33 | 34 | .numlock = { 35 | [0x4F] = '1', [0x50] = '2', [0x51] = '3', 36 | [0x4B] = '4', [0x4C] = '5', [0x4D] = '6', 37 | [0x47] = '7', [0x48] = '8', [0x49] = '9', 38 | [0x52] = '0', [0x4A] = '-', [0x4E] = '+', 39 | [0x37] = '*', [0x53] = '.' 40 | } 41 | }; 42 | -------------------------------------------------------------------------------- /src/drivers/terminal.c: -------------------------------------------------------------------------------- 1 | #include "../include/terminal.h" 2 | #include "../include/vga.h" 3 | 4 | extern size_t pmstr_len; 5 | 6 | void terminal_initialize(void){ 7 | t_row = 0; 8 | t_column = 0; 9 | t_color = vga_entry_color(VGA_COLOR_LIGHT_GREEN, VGA_COLOR_BLACK); 10 | t_buffer = (uint16_t*) 0xC00B8000; //テキストバッファはこのアドレスから始まる 11 | for (size_t y = 0; y < VGA_HEIGHT; ++y) { 12 | for (size_t x = 0; x < VGA_WIDTH; ++x) { 13 | const size_t index = y * VGA_WIDTH + x; 14 | t_buffer[index] = vga_entry(' ', t_color); 15 | } 16 | } 17 | } 18 | 19 | 20 | void terminal_setcolor(uint8_t color){ 21 | t_color = color; 22 | } 23 | 24 | 25 | void terminal_putentryat(uint8_t c, uint8_t color, size_t x, size_t y){ 26 | const size_t index = y * VGA_WIDTH + x; 27 | t_buffer[index] = vga_entry(c, color); 28 | } 29 | 30 | 31 | void terminal_uponerow(void){ 32 | for (size_t y = 1; y < VGA_HEIGHT; y++) { 33 | for (size_t x = 0; x < VGA_WIDTH; x++) { 34 | const size_t index = y * VGA_WIDTH + x; 35 | t_buffer[(y - 1) * VGA_WIDTH + x] = t_buffer[index]; 36 | if (y == (VGA_HEIGHT - 1)) { 37 | t_buffer[index] = vga_entry(' ', t_color); 38 | } 39 | } 40 | } 41 | } 42 | 43 | 44 | void terminal_putchar(uint8_t c){ 45 | if (c == '\n') { 46 | c = 0; 47 | if (++t_row >= VGA_HEIGHT) { 48 | terminal_uponerow(); 49 | --t_row; 50 | t_column = -1; 51 | } else { 52 | t_column = -1; 53 | } 54 | } else if (c == '\t') { 55 | c = 0; 56 | t_column += 4; 57 | } else if(c == '\b') { 58 | c = 0; 59 | t_buffer[(t_row * VGA_WIDTH + t_column) - 1] = vga_entry(' ', t_color); 60 | if ( t_column > pmstr_len + 2 ) { 61 | if (--t_column <= pmstr_len) { 62 | t_column = pmstr_len; 63 | 64 | 65 | /*プロンプト時は以下は無効 66 | t_column = VGA_WIDTH 67 | 68 | if (--t_row < 2) { 69 | t_row = 2; 70 | t_column = 0; 71 | } 72 | */ 73 | } 74 | } 75 | return; 76 | } 77 | terminal_putentryat(c, t_color, t_column, t_row); 78 | if (++t_column >= VGA_WIDTH) { 79 | t_column = 0; 80 | if (++t_row >= VGA_HEIGHT) { 81 | terminal_uponerow(); 82 | --t_row; 83 | } 84 | } 85 | } 86 | 87 | 88 | void terminal_write(const uint8_t* data, size_t size){ 89 | for (size_t i = 0; i < size; ++i) 90 | terminal_putchar(data[i]); 91 | } 92 | 93 | 94 | void terminal_writestring(const uint8_t* data){ 95 | terminal_write(data, sh_strlen(data)); 96 | } 97 | -------------------------------------------------------------------------------- /src/include/do_read.h: -------------------------------------------------------------------------------- 1 | #ifndef _DO_READ_H_ 2 | #define _DO_READ_H_ 3 | 4 | #include 5 | 6 | size_t do_read(int, void*, size_t); 7 | 8 | #endif _DO_READ_H 9 | -------------------------------------------------------------------------------- /src/include/do_write.h: -------------------------------------------------------------------------------- 1 | #ifndef _DO_WRITE_H_ 2 | #define _DO_WRITE_H_ 3 | 4 | #include 5 | 6 | size_t do_write(int, const void*, size_t); 7 | 8 | #endif _DO_WRITE_H 9 | -------------------------------------------------------------------------------- /src/include/gdt.h: -------------------------------------------------------------------------------- 1 | #ifndef _GDT_H_ 2 | #define _GDT_H_ 3 | 4 | #include 5 | #include 6 | 7 | #ifdef __cplusplus 8 | extern "C" void load_gdtr(uint32_t); 9 | #else 10 | extern void load_gdtr(uint32_t); 11 | #endif 12 | 13 | typedef struct{ 14 | uint16_t limit_low; 15 | uint16_t base_low; 16 | uint8_t base_mid; 17 | uint8_t s_access; 18 | uint8_t limit_high; 19 | uint8_t base_high; 20 | }__attribute__((packed)) gdt_desc; 21 | 22 | typedef struct{ 23 | uint16_t gdt_size; 24 | uint32_t base; 25 | }__attribute__((packed)) gdtr; 26 | 27 | #define GDT_LEN 8192 28 | gdt_desc gdt_entries[GDT_LEN]; 29 | 30 | void gdt_init(); 31 | void set_segment_desc(uint32_t, uint32_t, uint32_t, uint8_t, uint8_t); 32 | 33 | #endif _GDT_H_ 34 | -------------------------------------------------------------------------------- /src/include/get_ksize.h: -------------------------------------------------------------------------------- 1 | #ifndef _GET_KSIZE_H_ 2 | #define _GET_KSIZE_H_ 3 | 4 | #include 5 | 6 | extern uint32_t __kernel_start; 7 | extern uint32_t __kernel_end; 8 | 9 | uint32_t get_ksize(void); 10 | 11 | #endif _GET_KSIZE_H_ 12 | -------------------------------------------------------------------------------- /src/include/get_mmap.h: -------------------------------------------------------------------------------- 1 | #ifndef _GETMMAP_H_ 2 | #define _GETMMAP_H_ 3 | 4 | #include "multiboot.h" 5 | 6 | uint32_t getmmap(multiboot_info_t*); 7 | 8 | #define VBASE 0xC0000000 9 | 10 | #endif _GETMMAP_H_ 11 | -------------------------------------------------------------------------------- /src/include/idt.h: -------------------------------------------------------------------------------- 1 | #ifndef _IDT_H_ 2 | #define _IDT_H_ 3 | 4 | #include 5 | #include 6 | #include "interrupt.h" 7 | 8 | #ifdef __cplusplus 9 | extern "C" void load_idtr(uint32_t); 10 | #else 11 | extern void load_idtr(uint32_t); 12 | #endif 13 | 14 | extern as_keyboard_interrupt(void); 15 | extern as_software_interrupt(void); 16 | 17 | typedef struct{ 18 | uint16_t offset_low; 19 | uint16_t selector; 20 | uint8_t dw_count; 21 | uint8_t s_access; 22 | uint16_t offset_high; 23 | }__attribute__((packed)) gate_desc; 24 | 25 | typedef struct{ 26 | uint16_t idt_size; 27 | uint32_t base; 28 | }__attribute__((packed)) idtr; 29 | 30 | #define LIDT 0x000007ff 31 | #define IDT_LEN 256 32 | gate_desc idt_entries[IDT_LEN]; 33 | 34 | void idt_init(void); 35 | void set_gate_desc(uint32_t, uint32_t, uint32_t, uint8_t); 36 | 37 | #endif _IDT_H_ 38 | -------------------------------------------------------------------------------- /src/include/inb_outb.h: -------------------------------------------------------------------------------- 1 | #ifndef _INB_OUT_H_ 2 | #define _INB_OUT_H_ 3 | 4 | #include 5 | 6 | static inline uint8_t inb(uint16_t port){ 7 | uint8_t ret; 8 | asm volatile("inb %1, %0" 9 | : "=a"(ret) 10 | : "Nd"(port)); 11 | return ret; 12 | } 13 | 14 | 15 | static inline uint8_t outb(uint16_t port, uint8_t val){ 16 | asm volatile("outb %0, %1" : : "a"(val), "Nd"(port)); 17 | } 18 | 19 | 20 | #endif _INB_OUT_H_ 21 | -------------------------------------------------------------------------------- /src/include/init_pmemory.h: -------------------------------------------------------------------------------- 1 | #ifndef _INIT_PMEMORY_H_ 2 | #define _INIT_PMEMORY_H_ 3 | 4 | #include 5 | #include 6 | 7 | #include "multiboot.h" 8 | #include "get_ksize.h" 9 | #include "get_mmap.h" 10 | #include "../sh_libc/include/stdio.h" 11 | #include "../sh_libc/include/string.h" 12 | 13 | typedef struct{ 14 | uint32_t system_msize; //システムメモリサイズ 15 | uint32_t system_mbloks; //システムメモリブロック数 16 | uint32_t allocated_blocks; //割り当て済のブロック数 17 | uint32_t free_blocks; //フリーブロック数 18 | uint32_t* mmap; //ビットマップ 19 | uint32_t mmap_size; //ビットマップのサイズ 20 | }p_memory_info; 21 | 22 | p_memory_info pm_info; 23 | 24 | void get_system_mblocks(uint32_t); 25 | void setmemory(int); 26 | void clearmemory(int); 27 | void pbitmap_free(uint32_t, uint32_t); 28 | void pbitmap_alloc(uint32_t, uint32_t); 29 | 30 | #endif _INIT_PMEMORY_H_ 31 | -------------------------------------------------------------------------------- /src/include/init_vmemory.h: -------------------------------------------------------------------------------- 1 | #ifndef _INIT_VMEMORY_H_ 2 | #define _INIT_VMEMORY_H_ 3 | 4 | #include 5 | #include 6 | 7 | #include "init_pmemory.h" 8 | #include "pmalloc.h" 9 | 10 | #define PE_PFLAG 0x00000001 11 | #define PE_RWFLAG 0x00000002 12 | 13 | //pte & pdeの形を定義 14 | typedef uint32_t page_table_entry; 15 | typedef uint32_t page_dir_entry; 16 | extern p_memory_info pm_info; 17 | 18 | extern void enable_paging(page_dir_entry *); 19 | int init_paging(void); 20 | int init_vmemory(void); 21 | 22 | #endif _INIT_PMEMORY_H_ 23 | -------------------------------------------------------------------------------- /src/include/interrupt.h: -------------------------------------------------------------------------------- 1 | #ifndef _INETRRUPT_H_ 2 | #define _INETRRUPT_H_ 3 | 4 | #include "pic.h" 5 | 6 | #include 7 | #include 8 | 9 | void interrupt_done(void); 10 | 11 | //irq 12 | void keyboard_interrupt(void); 13 | 14 | //irqnum 15 | #define irq1 0x61 16 | 17 | #endif _INETRRUPT_H_ 18 | -------------------------------------------------------------------------------- /src/include/kernel.h: -------------------------------------------------------------------------------- 1 | #ifndef _KERNEL_H_ 2 | #define _KERNEL_H_ 3 | 4 | 5 | #if !defined(__cplusplus) 6 | #include 7 | #endif 8 | 9 | #include 10 | #include 11 | 12 | /* コンパイラが正しいターゲットを認識しているかの確認 */ 13 | #if defined(__linux__) 14 | #error "You are not using a cross-compiler, you will most certainly run into trouble" 15 | #endif 16 | 17 | /* 32-bit x86ターゲット以外のコンパイラを使用するとエラーになる */ 18 | #if !defined(__i386__) 19 | #error "This tutorial needs to be compiled with a ix86-elf compiler" 20 | #endif 21 | 22 | #include "terminal.h" 23 | #include "keyboard.h" 24 | #include "inb_outb.h" 25 | #include "gdt.h" 26 | #include "pic.h" 27 | #include "idt.h" 28 | #include "multiboot.h" 29 | #include "get_mmap.h" 30 | #include "get_ksize.h" 31 | #include "init_pmemory.h" 32 | #include "init_vmemory.h" 33 | #include "pmalloc.h" 34 | 35 | #include "../sh_libc/include/stdio.h" 36 | #include "../sh_libc/include/math.h" 37 | #include "../sh_libc/include/io.h" 38 | 39 | int input_line(char*, char*); 40 | void prompt(void); 41 | int executing(char*); 42 | 43 | #endif _KERNEL_H_ 44 | -------------------------------------------------------------------------------- /src/include/keyboard.h: -------------------------------------------------------------------------------- 1 | #ifndef _KEYBOARD_H_ 2 | #define _KEYBOARD_H_ 3 | 4 | #include 5 | #include 6 | #include 7 | 8 | //command 9 | #define SWITCH_LED 0xED 10 | #define ENABLE_KEYBOARD 0xF4 11 | #define SET_SCANCODESET 0xF0 12 | #define SET_TYPEMATIC_RATE 0xF3 13 | 14 | //options 15 | #define SCAN_CODE_SET1 0x01 16 | #define SCAN_CODE_SET2 0x02 17 | #define SCAN_CODE_SET3 0x03 18 | #define GET_SCAN_CODE_SET 0x00 19 | 20 | #define TYPEMATICDELAY_SET01 0x01 21 | #define TYPEMATICDELAY_SET02 0x02 22 | #define TYPEMATICDELEY_SET11 0x0B 23 | 24 | #define PORTMAP_KEYBOARD1 0x60 25 | #define PORTMAP_KEYBOARD2 0x64 26 | 27 | //keyled 28 | #define SET_CAPSLOCK_LED 0x04 29 | #define SET_NUMLOCK_LED 0x02 30 | #define SET_SCROLLLOCK_LED 0x01 31 | 32 | //scan_code 33 | #define L_SHIFT 0x2A 34 | #define R_SHIFT 0x36 35 | #define CAPS_LOCK 0x3A 36 | #define NUM_LOCK 0x45 37 | #define SCROLL_LOCK 0x46 38 | 39 | typedef struct{ 40 | uint8_t pdata[128]; 41 | size_t write; 42 | size_t read; 43 | size_t len; 44 | }key_buf; 45 | 46 | typedef struct{ 47 | uint8_t base[0x80]; 48 | uint8_t shift[0x80]; 49 | uint8_t numlock[0x80]; 50 | }keymap; 51 | 52 | typedef struct{ 53 | bool shift_enable:1; 54 | bool relese_enable:1; 55 | bool caps_lock:1; 56 | bool num_lock:1; 57 | bool scr_lock:1; 58 | uint8_t led_stat; 59 | }kb_stat; 60 | 61 | kb_stat ks; 62 | const keymap key_code; 63 | bool ext_input; 64 | 65 | void key_init(void); 66 | uint8_t ps2_kerboard_init(void); 67 | void keyboard_input_int(uint8_t); 68 | void switch_kb_led(uint8_t); 69 | uint8_t enable_keyboard(void); 70 | uint8_t getscode(void); 71 | uint8_t getscodeset(void); 72 | void change_codeset(uint8_t); 73 | void change_trate_delay(uint8_t); 74 | void input_bufdata(uint8_t); 75 | 76 | #endif _KEYBOARD_H_ 77 | -------------------------------------------------------------------------------- /src/include/multiboot.h: -------------------------------------------------------------------------------- 1 | #ifndef _MULTIBOOT_H_ 2 | #define _MULTIBOOT_H_ 3 | 4 | #include 5 | #include 6 | 7 | typedef struct { 8 | uint32_t num; 9 | uint32_t size; 10 | uint32_t addr; 11 | uint32_t shndx; 12 | } multiboot_elf_section_header_table_t; 13 | 14 | typedef struct { 15 | uint32_t tab_size; 16 | uint32_t str_size; 17 | uint32_t addr; 18 | uint32_t reserved; 19 | } aout_symbol_table_t; 20 | 21 | typedef struct { 22 | uint32_t flag; 23 | uint32_t mem_lower; 24 | uint32_t mem_upper; 25 | uint32_t boot_device; 26 | uint32_t cmdline; 27 | uint32_t module_count; 28 | uint32_t module_addr; 29 | 30 | union { 31 | aout_symbol_table_t aout_sym; 32 | multiboot_elf_section_header_table_t elf_sec; 33 | } u; 34 | 35 | uint32_t mmap_length; 36 | uint32_t mmap_addr; 37 | } multiboot_info_t; 38 | 39 | typedef struct{ 40 | uint32_t size; 41 | uint32_t base_addr_low; 42 | uint32_t base_addr_high; 43 | uint32_t length_low; 44 | uint32_t length_high; 45 | uint32_t type; 46 | } multiboot_memory_t; 47 | 48 | #endif _MULTIBOOT_H_ 49 | -------------------------------------------------------------------------------- /src/include/pic.h: -------------------------------------------------------------------------------- 1 | #ifndef _PIC_H_ 2 | #define _PIC_H_ 3 | 4 | #include 5 | #include "inb_outb.h" 6 | 7 | //PICマスター/スレーブのポートアドレス 8 | #define MASTER_PIC_CMD_STAT 0x20 9 | #define MASTER_PIC_MASK_DATA 0x21 10 | #define SLAVE_PIC_CMD_STAT 0xA0 11 | #define SLAVE_PIC_MASK_DATA 0xa1 12 | 13 | //ICWコマンド 14 | #define WRITE_ICW1 0x11 15 | #define WRITE_ICW2_M 0x20 16 | #define WRITE_ICW2_S 0x28 17 | #define WRITE_ICW3_M 0x04 18 | #define WRITE_ICW3_S 0x02 19 | #define WRITE_ICW4_X86MODE 0x01 20 | #define CLEAR_MASK 0xff 21 | 22 | //OCW1 23 | #define PIC_MASK_IRQ0 0x01 24 | #define PIC_MASK_IRQ1 0x02 25 | #define PIC_MASK_IRQ2 0x04 26 | #define PIC_MASK_IRQ3 0x08 27 | #define PIC_MASK_IRQ4 0x10 28 | #define PIC_MASK_IRQ5 0x20 29 | #define PIC_MASK_IRQ6 0x40 30 | #define PIC_MASK_IRQ7 0x80 31 | #define PIC_MASK_IRQA 0x00 32 | 33 | //EOI 34 | #define PIC_EOI 0x20 35 | 36 | void pic_init(void); 37 | 38 | #endif _PIC_H_ 39 | -------------------------------------------------------------------------------- /src/include/pmalloc.h: -------------------------------------------------------------------------------- 1 | #ifndef _PMALLOC_H_ 2 | #define _PMALLOC_H_ 3 | 4 | #include 5 | #include 6 | 7 | #include "init_pmemory.h" 8 | #include "../sh_libc/include/stdio.h" 9 | 10 | extern p_memory_info pm_info; 11 | 12 | int findfreememory(unsigned int*); 13 | void* malloc4kb(void); 14 | void free4kb(void*); 15 | 16 | #endif _PMALLOC_H_ 17 | -------------------------------------------------------------------------------- /src/include/syscall.h: -------------------------------------------------------------------------------- 1 | #ifndef _SYSCALL_H_ 2 | #define _SYSCALL_H_ 3 | 4 | #include 5 | #include "syscallnum.h" 6 | 7 | uint32_t syscall_interrupt(uint32_t, uint32_t, uint32_t, 8 | uint32_t, uint32_t, uint32_t); 9 | 10 | #endif _SYSCALL_H_ 11 | -------------------------------------------------------------------------------- /src/include/syscallnum.h: -------------------------------------------------------------------------------- 1 | #ifndef _SYSCALLNUM_H_ 2 | #define _SYSCALLNUM_H_ 3 | 4 | #define SYSCALL_WRITE 0 5 | #define SYSCALL_READ 1 6 | 7 | #endif _SYSCALLNUM_H_ 8 | -------------------------------------------------------------------------------- /src/include/terminal.h: -------------------------------------------------------------------------------- 1 | #ifndef _TERMINAL_H_ 2 | #define _TERMINAL_H_ 3 | 4 | #include 5 | #include 6 | 7 | static const size_t VGA_WIDTH = 80; 8 | static const size_t VGA_HEIGHT = 25; 9 | static size_t t_row; 10 | static size_t t_column; 11 | static uint8_t t_color; 12 | static uint16_t* t_buffer; 13 | 14 | void terminal_initialize(void); 15 | void terminal_setcolor(uint8_t); 16 | void terminal_putentryat(uint8_t, uint8_t, size_t, size_t); 17 | void terminal_uponerow(void); 18 | void terminal_putchar(uint8_t c); 19 | void terminal_write(const uint8_t*, size_t); 20 | void terminal_writestring(const uint8_t*); 21 | 22 | #endif _TERMINAL_H_ 23 | -------------------------------------------------------------------------------- /src/include/vga.h: -------------------------------------------------------------------------------- 1 | #ifndef _VGA_H_ 2 | #define _VGA_H_ 3 | 4 | #include 5 | 6 | enum vga_color { 7 | VGA_COLOR_BLACK = 0, 8 | VGA_COLOR_BLUE = 1, 9 | VGA_COLOR_GREEN = 2, 10 | VGA_COLOR_CYAN = 3, 11 | VGA_COLOR_RED = 4, 12 | VGA_COLOR_MAGENTA = 5, 13 | VGA_COLOR_BROWN = 6, 14 | VGA_COLOR_LIGHT_GREY = 7, 15 | VGA_COLOR_DARK_GREY = 8, 16 | VGA_COLOR_LIGHT_BLUE = 9, 17 | VGA_COLOR_LIGHT_GREEN = 10, 18 | VGA_COLOR_LIGHT_CYAN = 11, 19 | VGA_COLOR_LIGHT_RED = 12, 20 | VGA_COLOR_LIGHT_MAGENTA = 13, 21 | VGA_COLOR_LIGHT_BROWN = 14, 22 | VGA_COLOR_WHITE = 15, 23 | }; 24 | 25 | static inline uint8_t vga_entry_color(enum vga_color fg, enum vga_color bg){ 26 | return fg | bg << 4; 27 | 28 | } 29 | 30 | 31 | 32 | static inline uint16_t vga_entry(unsigned char uc, uint8_t color){ 33 | return (uint16_t)uc | (uint16_t)color << 8; 34 | 35 | } 36 | 37 | 38 | #endif _VGA_H_ 39 | -------------------------------------------------------------------------------- /src/isodir/boot/grub/grub.cfg: -------------------------------------------------------------------------------- 1 | menuentry "myos" { 2 | multiboot /boot/myos.bin 3 | } -------------------------------------------------------------------------------- /src/kernel/do_read.c: -------------------------------------------------------------------------------- 1 | #include "../include/do_read.h" 2 | 3 | size_t do_read(int fd, void* buffer, size_t byte){ 4 | if (!byte) { return 0;} 5 | if (fd < 0) { return -1; } 6 | if (buffer == NULL) { return -1; } 7 | 8 | sh_printf("sh_read() ok\n"); 9 | # 10 | 11 | return byte; 12 | } 13 | -------------------------------------------------------------------------------- /src/kernel/do_write.c: -------------------------------------------------------------------------------- 1 | #include "../include/do_write.h" 2 | 3 | size_t do_write(int fd, const void* buffer, size_t byte){ 4 | if (!byte) { return 0;} 5 | if (fd < 0) { return -1; } 6 | if (buffer == NULL) { return -1; } 7 | 8 | # 9 | 10 | return byte; 11 | } 12 | -------------------------------------------------------------------------------- /src/kernel/interrupt.c: -------------------------------------------------------------------------------- 1 | #include "../include/interrupt.h" 2 | 3 | void interrupt_done(void){ 4 | outb(MASTER_PIC_CMD_STAT, PIC_EOI); 5 | outb(SLAVE_PIC_CMD_STAT, PIC_EOI); 6 | } 7 | 8 | 9 | void keyboard_interrupt(void){ 10 | outb(MASTER_PIC_CMD_STAT, irq1); 11 | keyboard_input_int(sh_getchar()); 12 | interrupt_done(); 13 | } 14 | -------------------------------------------------------------------------------- /src/kernel/interrupt.s: -------------------------------------------------------------------------------- 1 | .global as_keyboard_interrupt 2 | .global as_software_interrupt 3 | 4 | .extern keyboard_interrupt 5 | .extern syscall_interrupt 6 | 7 | as_keyboard_interrupt: 8 | push %es 9 | push %ds 10 | pushal 11 | mov %esp, %eax 12 | push %eax 13 | mov %ss, %ax 14 | mov %ax, %ds 15 | mov %ax, %es 16 | call keyboard_interrupt 17 | pop %eax 18 | popal 19 | pop %ds 20 | pop %es 21 | sti 22 | iretl 23 | 24 | 25 | as_software_interrupt: 26 | pushl %esp 27 | pushl %ebp 28 | pushl %esi 29 | pushl %edi 30 | pushl %edx 31 | pushl %ecx 32 | pushl %ebx 33 | pushl %eax 34 | call syscall_interrupt 35 | popl %eax 36 | popl %ebx 37 | popl %ecx 38 | popl %edx 39 | popl %edi 40 | popl %esi 41 | popl %ebp 42 | popl %esp 43 | iretl 44 | 45 | -------------------------------------------------------------------------------- /src/kernel/kernel.c: -------------------------------------------------------------------------------- 1 | #include "../include/kernel.h" 2 | 3 | extern key_buf kb; 4 | extern size_t pmstr_len; 5 | size_t pmstr_len; 6 | static size_t i; 7 | 8 | void kernel_main(multiboot_info_t* mbt, uint32_t magic){ 9 | terminal_initialize(); 10 | 11 | //memory 12 | //init_pmemory(mbt, getmmap(mbt)); 13 | //sh_printf("physical memory init... OK!\n"); 14 | //init_vmemory(); 15 | //sh_printf("virtual memory init... OK!\n"); 16 | 17 | //multiboot 18 | sh_printf("multiboot magic number 0x%x\n", magic); 19 | getmmap(mbt); 20 | 21 | //cr0レジスタの値を確認 22 | uint32_t cr0_data; 23 | asm volatile( 24 | "pop %%eax \n" 25 | "mov %%cr0, %%eax \n" 26 | : "=a"(cr0_data) : : ); 27 | sh_printf("cr0 registar=0x%x\n", cr0_data); 28 | 29 | gdt_init(); 30 | pic_init(); 31 | idt_init(); 32 | key_init(); 33 | 34 | sh_printf("Hello, kernel World! \n\n"); 35 | prompt(); 36 | } 37 | 38 | 39 | void prompt(void){ 40 | int result = -1; 41 | char cmdline[1024]; 42 | char *prompt_name = "prompt"; 43 | pmstr_len = sh_strlen(prompt_name); 44 | sh_printf("\n%s> ", prompt_name); 45 | 46 | kb.len = 0; 47 | kb.write = 0; 48 | kb.read = 0; 49 | i = 0; 50 | 51 | for (;;) { 52 | if ((result = input_line(prompt_name, cmdline)) != -1) { 53 | if (i) { 54 | if (executing(cmdline) == -1) { 55 | sh_printf("\nCommand not found!"); 56 | } 57 | } 58 | sh_printf("\n%s> ", prompt_name); 59 | result = -1; 60 | i = 0; 61 | } 62 | } 63 | } 64 | 65 | 66 | int input_line(char* prompt_name, char* cmdline){ 67 | asm volatile("cli"); 68 | if (!kb.len) { 69 | asm volatile("sti"); 70 | } else { 71 | char c = kb.pdata[kb.read]; 72 | --kb.len; 73 | ++kb.read; 74 | if (kb.read == 128) { kb.read = 0; } 75 | asm volatile("sti"); 76 | 77 | if (c == '\n') { 78 | cmdline[i] = '\0'; 79 | return 0; 80 | } else if (c == '\b') { 81 | cmdline[i] == '\0'; 82 | if (i > 0) { --i; } 83 | } else { 84 | cmdline[i++] = c; 85 | } 86 | sh_printf("%c", c); 87 | } 88 | return -1; 89 | } 90 | 91 | 92 | int executing(char* cmdline){ 93 | if (!sh_strcmp(cmdline, "clear")) { 94 | terminal_initialize(); 95 | return 0; 96 | } else if (!sh_strcmp(cmdline, "reboot")){ 97 | outb(0x64, 0xFE); 98 | return 0; 99 | } else { 100 | return -1; 101 | } 102 | } 103 | -------------------------------------------------------------------------------- /src/kernel/syscall.c: -------------------------------------------------------------------------------- 1 | #include "../include/syscall.h" 2 | #include "../sh_libc/include/stdio.h" 3 | 4 | uint32_t syscall_interrupt(uint32_t syscall_num, 5 | uint32_t arg1, 6 | uint32_t arg2, 7 | uint32_t arg3, 8 | uint32_t arg4, 9 | uint32_t arg5){ 10 | switch (syscall_num) { 11 | case SYSCALL_WRITE: 12 | return do_write(arg1, arg2, arg3); 13 | break; 14 | case SYSCALL_READ: 15 | return do_read(arg1, arg2, arg3); 16 | break; 17 | } 18 | return 0; 19 | } 20 | -------------------------------------------------------------------------------- /src/linker.ld: -------------------------------------------------------------------------------- 1 | ENTRY(_loader) 2 | OUTPUT_FORMAT(elf32-i386) 3 | 4 | SECTIONS{ 5 | . = 0xC0100000; 6 | 7 | .text ALIGN(4K) : AT(ADDR(.text) - 0xC0000000) { 8 | __kernel_start = .; 9 | *(.multiboot) 10 | *(.text) 11 | } 12 | 13 | .rodata ALIGN(4K) : AT(ADDR(.rodata) - 0xC0000000) { 14 | *(.rodata*) 15 | } 16 | 17 | .data ALIGN(4K) : AT(ADDR(.data) - 0xC0000000) { 18 | *(.data) 19 | } 20 | 21 | .bss ALIGN(4K) : AT(ADDR(.bss) - 0xC0000000) { 22 | *(COMMON) 23 | *(.bss) 24 | __kernel_end = .; 25 | } 26 | } 27 | 28 | 29 | -------------------------------------------------------------------------------- /src/memory/get_ksize.c: -------------------------------------------------------------------------------- 1 | #include "../include/get_ksize.h" 2 | 3 | uint32_t get_ksize(void){ 4 | return &__kernel_end - &__kernel_start; 5 | } 6 | -------------------------------------------------------------------------------- /src/memory/get_mmap.c: -------------------------------------------------------------------------------- 1 | #include "../include/get_mmap.h" 2 | 3 | uint32_t getmmap(multiboot_info_t* mbt){ 4 | multiboot_memory_t* mmap = mbt -> mmap_addr | VBASE; 5 | 6 | char type_str[32]; 7 | uint32_t total_mem_size; 8 | 9 | sh_printf("\n\n================get memory map=====================\n"); 10 | 11 | for (mmap; mmap < (mbt -> mmap_addr + mbt -> mmap_length | VBASE); mmap++) { 12 | switch (mmap -> type) { 13 | case 0x1:; 14 | sh_strcpy(type_str, "available RAM"); 15 | break; 16 | case 0x2:; 17 | sh_strcpy(type_str, "reserved RAM"); 18 | break; 19 | case 0x03:; 20 | sh_strcpy(type_str, "ACPI reclaimable RAM"); 21 | break; 22 | case 0x04:; 23 | sh_strcpy(type_str, "ACPI non-volatile storage RAM"); 24 | break; 25 | case 0x05:; 26 | sh_strcpy(type_str, "Usage prohibited RAM"); 27 | break; 28 | } 29 | 30 | if (mmap -> base_addr_high == 0x0) { 31 | sh_printf("base_addr = 0x%x: ", mmap -> base_addr_low); 32 | } else { 33 | sh_printf("base_addr = 0x%x%08x: ", mmap -> base_addr_high, mmap -> base_addr_low); 34 | } 35 | 36 | if (mmap -> length_high == 0x0) { 37 | sh_printf("length = 0x%x: ", mmap -> length_low); 38 | } else { 39 | sh_printf("length = 0x%x%08x: ", mmap -> length_high, mmap -> length_low); 40 | } 41 | sh_printf("type = %s\n", type_str); 42 | 43 | } 44 | 45 | 46 | total_mem_size = (mbt -> mem_lower + mbt -> mem_upper + 1024) / 1024; 47 | sh_printf("Total memory %dMB\n", total_mem_size); 48 | sh_printf("===================================================\n\n"); 49 | 50 | return total_mem_size; 51 | } 52 | -------------------------------------------------------------------------------- /src/memory/init_pmemory.c: -------------------------------------------------------------------------------- 1 | #include "../include/init_pmemory.h" 2 | 3 | void get_system_mblocks(uint32_t msize){ 4 | pm_info.system_msize = msize; 5 | pm_info.system_mbloks = msize / 4096; 6 | pm_info.allocated_blocks = pm_info.system_mbloks; 7 | pm_info.free_blocks = 0; 8 | pm_info.mmap = &__kernel_end; 9 | pm_info.mmap_size = pm_info.system_mbloks / sizeof(uint32_t) * 8; 10 | sh_memset((void *)pm_info.mmap, 0xff, pm_info.mmap_size); 11 | } 12 | 13 | 14 | void setmemory(int bnum){ 15 | pm_info.mmap[bnum / 32] |= (1 << (bnum % 32)); 16 | } 17 | 18 | 19 | void clearmemory(int bnum){ 20 | pm_info.mmap[bnum / 32] &= ~(1 << (bnum % 32)); 21 | } 22 | 23 | 24 | void pbitmap_free(uint32_t address, uint32_t size){ 25 | address /= 4096; 26 | size /= 4096; 27 | 28 | for (size_t i = address; i <= size; i++) { 29 | clearmemory(address); 30 | address++; 31 | pm_info.allocated_blocks--; 32 | pm_info.free_blocks++; 33 | } 34 | } 35 | 36 | 37 | void pbitmap_alloc(uint32_t address, uint32_t size){ 38 | address /= 4096; 39 | size = (size / 4096) == 0 ? 1 : size / 4096; 40 | 41 | for (size_t i = address; i <= size; i++) { 42 | setmemory(address); 43 | address++; 44 | pm_info.allocated_blocks++; 45 | pm_info.free_blocks--; 46 | } 47 | } 48 | 49 | 50 | void init_pmemory(multiboot_info_t *mbt, uint32_t total_msize){ 51 | uint32_t send_addr; 52 | uint32_t send_length; 53 | multiboot_memory_t* mmap = mbt -> mmap_addr | VBASE; 54 | 55 | get_system_mblocks(total_msize * 1024 * 1024); 56 | 57 | for (mmap; mmap < (mbt -> mmap_addr + mbt -> mmap_length | VBASE); mmap++) { 58 | send_addr = (mmap -> base_addr_high << 8) | mmap -> base_addr_low; 59 | send_length = (mmap -> length_high << 8 ) | mmap -> length_low; 60 | 61 | if (mmap -> type == 0x1 || mmap -> type == 0x3) { 62 | if (send_addr == &__kernel_start) { 63 | pbitmap_alloc(send_addr, get_ksize() + pm_info.mmap_size); 64 | pbitmap_free(&__kernel_end, send_length - (get_ksize() + pm_info.mmap_size)); 65 | } else { 66 | pbitmap_free(send_addr, send_length); 67 | } 68 | } else { 69 | pbitmap_alloc(send_addr, send_length); 70 | } 71 | } 72 | } 73 | -------------------------------------------------------------------------------- /src/memory/init_vmemory.c: -------------------------------------------------------------------------------- 1 | 2 | #include "../include/init_vmemory.h" 3 | 4 | int init_paging(void){ 5 | page_dir_entry* page_directory = (page_dir_entry*)malloc4kb(); 6 | page_table_entry* page_table = (page_table_entry*)malloc4kb(); 7 | 8 | for (size_t i = 0, address = 0x0; i < 1024; i++, address += 0x1000) { 9 | page_directory[i] = PE_RWFLAG; 10 | page_table[i] = address | (PE_RWFLAG | PE_PFLAG); 11 | } 12 | 13 | page_directory[0] = (page_dir_entry)page_table | (PE_RWFLAG | PE_PFLAG); 14 | enable_paging(page_directory); 15 | 16 | return 0; 17 | } 18 | 19 | 20 | int init_vmemory(void){ 21 | if (!init_paging()) { 22 | sh_printf("Initialize paging init... OK!\n"); 23 | } 24 | } 25 | -------------------------------------------------------------------------------- /src/memory/paging.s: -------------------------------------------------------------------------------- 1 | .text 2 | .global enable_paging 3 | 4 | enable_paging: 5 | push %ebp 6 | mov %esp, %ebp 7 | 8 | //writing cr3 9 | mov 8(%esp), %eax 10 | mov %eax, %cr3 11 | 12 | //writing cr0 13 | mov %cr0, %eax 14 | or $0x80000000, %eax 15 | mov %eax, %cr0 16 | 17 | mov %ebp, %esp 18 | pop %ebp 19 | ret 20 | -------------------------------------------------------------------------------- /src/memory/pmalloc.c: -------------------------------------------------------------------------------- 1 | #include "../include/pmalloc.h" 2 | 3 | int findfreememory(unsigned int *bnum){ 4 | for (size_t b_index = 0; b_index < pm_info.mmap_size; b_index++) { 5 | if (pm_info.mmap[b_index] != 0xFFFFFFFF) { 6 | for (size_t b_count = 0; b_count < 32; b_count++) { 7 | if (!(pm_info.mmap[b_index] & (1 << (b_count % 32)))) { 8 | *bnum = b_index * sizeof(unsigned int) * 8 + b_count; 9 | return 0; 10 | } 11 | } 12 | } 13 | } 14 | return -1; 15 | } 16 | 17 | 18 | void* malloc4kb(void){ 19 | unsigned int b_number; 20 | void* p_address; 21 | int status; 22 | if (pm_info.free_blocks <= 0) { return NULL; } 23 | if (findfreememory(&b_number)) { return NULL; } 24 | setmemory(b_number); 25 | 26 | p_address = (void *)(b_number * 4096); 27 | 28 | pm_info.allocated_blocks++; 29 | pm_info.free_blocks--; 30 | 31 | return p_address; 32 | } 33 | 34 | 35 | void free4kb(void* p_address){ 36 | unsigned int b_number; 37 | b_number = (unsigned int)p_address / 4096; 38 | 39 | clearmemory(b_number); 40 | 41 | pm_info.allocated_blocks--; 42 | pm_info.free_blocks++; 43 | } 44 | -------------------------------------------------------------------------------- /src/sh_libc/include/io.h: -------------------------------------------------------------------------------- 1 | #ifndef _IO_H_ 2 | #define _IO_H_ 3 | 4 | #include 5 | #include "../../include/syscall.h" 6 | #include "sysdep.h" 7 | 8 | size_t sh_write(int, const void*, size_t); 9 | size_t sh_read(int, void*, size_t); 10 | 11 | #endif _IO_H_ 12 | -------------------------------------------------------------------------------- /src/sh_libc/include/math.h: -------------------------------------------------------------------------------- 1 | #ifndef _MATH_H_ 2 | #define _MATH_H_ 3 | 4 | #include 5 | 6 | double sh_pow(double, double); 7 | 8 | #endif _MATH_H_ 9 | -------------------------------------------------------------------------------- /src/sh_libc/include/stdio.h: -------------------------------------------------------------------------------- 1 | #ifndef _STDIO_H_ 2 | #define _STDIO_H_ 3 | 4 | #include 5 | #include 6 | #include 7 | #include 8 | #include 9 | 10 | #include "../../include/terminal.h" 11 | 12 | bool PRINTF_LEN_FLAG; 13 | 14 | #define NULL ((void *)0) 15 | 16 | int sh_printf(const unsigned char*, ...); 17 | int sh_vprintf(const unsigned char*, va_list); 18 | void numeral_formatting(int, int, int); 19 | static bool print(const unsigned char*, size_t); 20 | int sh_putchar(int); 21 | unsigned char sh_getchar(void); 22 | 23 | #endif _STDIO_H_ 24 | -------------------------------------------------------------------------------- /src/sh_libc/include/stdlib.h: -------------------------------------------------------------------------------- 1 | #ifndef _STDLIB_H_ 2 | #define _STDLIB_H_ 3 | 4 | #include 5 | 6 | void sh_itoa(unsigned long, unsigned char*, unsigned int); 7 | 8 | #endif _STDLIB_H_ 9 | -------------------------------------------------------------------------------- /src/sh_libc/include/string.h: -------------------------------------------------------------------------------- 1 | #ifndef _STRING_H_ 2 | #define _STRING_H_ 3 | 4 | #include 5 | #include 6 | 7 | size_t sh_strlen(const uint8_t*); 8 | void sh_strrev(unsigned char*); 9 | char* sh_strcpy(char*, const char*); 10 | char* sh_strcat(char*, const char*); 11 | int sh_strcmp(const char*, const char*); 12 | void* sh_memcpy(void* restrict, const void* restrict, size_t); 13 | void* sh_memset(void *, int, size_t); 14 | 15 | #endif _STRING_H_ 16 | -------------------------------------------------------------------------------- /src/sh_libc/include/sysdep.h: -------------------------------------------------------------------------------- 1 | #ifndef _SYSDEP_H_ 2 | #define _SYSDEP_H_ 3 | 4 | #include 5 | 6 | #define GET_MACRO(_1, _2, _3, _4, _5, _6, NAME, ...) NAME 7 | #define system_call(...) GET_MACRO(__VA_ARGS__, system_call5, system_call4, system_call3, \ 8 | system_call2, system_call1)(__VA_ARGS__) 9 | 10 | uint32_t system_call5(uint32_t, uint32_t, uint32_t, uint32_t, uint32_t, uint32_t); 11 | uint32_t system_call4(uint32_t, uint32_t, uint32_t, uint32_t, uint32_t); 12 | uint32_t system_call3(uint32_t, uint32_t, uint32_t, uint32_t); 13 | uint32_t system_call2(uint32_t, uint32_t, uint32_t); 14 | uint32_t system_call1(uint32_t, uint32_t); 15 | 16 | #endif _SYSDEP_H_ 17 | -------------------------------------------------------------------------------- /src/sh_libc/io.c: -------------------------------------------------------------------------------- 1 | #include "include/io.h" 2 | 3 | size_t sh_write(int fd, const void* buffer, size_t byte){ 4 | return system_call(SYSCALL_WRITE, fd, buffer, byte); 5 | } 6 | 7 | size_t sh_read(int fd, void* buffer, size_t byte){ 8 | return system_call(SYSCALL_READ, fd, buffer, byte); 9 | } 10 | -------------------------------------------------------------------------------- /src/sh_libc/math.c: -------------------------------------------------------------------------------- 1 | #include "include/math.h" 2 | 3 | double sh_pow(double x, double y){ 4 | int i = 1; 5 | int j = 1; 6 | double p = 1; 7 | 8 | if (!y) { return 1; } 9 | 10 | if (y > 0) { 11 | while (i <= y) { 12 | p *= x; 13 | ++i; 14 | } 15 | return p; 16 | } 17 | 18 | if (y < 0) { 19 | y = - y; 20 | while (j <= y) { 21 | p *= x; 22 | ++j; 23 | } 24 | } 25 | return (1 / p); 26 | } 27 | -------------------------------------------------------------------------------- /src/sh_libc/stdio.c: -------------------------------------------------------------------------------- 1 | #include "include/stdio.h" 2 | 3 | int sh_printf(const unsigned char* format, ...){ 4 | va_list parameter; 5 | va_start(parameter, format); 6 | sh_vprintf(format, parameter); 7 | va_end(format); 8 | return 0; 9 | } 10 | 11 | 12 | int sh_vprintf(const unsigned char* format, va_list parameter){ 13 | unsigned long num = 0; 14 | size_t amount = 0; 15 | 16 | while (*format != '\0') { 17 | if (format[0] != '%' || format[1] == '%') { 18 | if (format[0] == '%') { ++format; } 19 | amount = 1; 20 | while (format[amount] && format[amount] != '%') { ++amount; } 21 | if (!print(format, amount)) { return -1; } 22 | format += amount; 23 | continue; 24 | } 25 | 26 | const char* format_begun_at = format++; 27 | unsigned int length = 0; 28 | 29 | //length 30 | if (*format == '0'){ 31 | PRINTF_LEN_FLAG = true; 32 | format++; 33 | while(*format >= '0' && *format <= '9'){ 34 | length = (length * 10) + (*format - '0'); 35 | format++; 36 | } 37 | } 38 | 39 | //type 40 | switch (*format) { 41 | case 's': 42 | ++format; 43 | const char* string = va_arg(parameter, const char*); 44 | if (!print(string, sh_strlen(string))) { return -1; } 45 | break; 46 | 47 | case 'c': 48 | ++format; 49 | unsigned char chardata[2]; 50 | chardata[0] = (char)va_arg(parameter, int); 51 | chardata[1] = '\0'; 52 | if (!print(chardata, sh_strlen(chardata))) { return -1; } 53 | break; 54 | 55 | case 'i': 56 | case 'd': 57 | ++format; 58 | num = va_arg(parameter, int); 59 | numeral_formatting(num, length, 10); 60 | break; 61 | 62 | case 'x': 63 | ++format; 64 | num = va_arg(parameter, unsigned long); 65 | numeral_formatting(num, length, 16); 66 | break; 67 | 68 | default: 69 | format = format_begun_at; 70 | if (!print(format, sh_strlen(format))) { return -1; } 71 | format += sh_strlen(format); 72 | } 73 | num = 0; 74 | } 75 | return 0; 76 | 77 | } 78 | 79 | 80 | void numeral_formatting(int num, int length, int redix){ 81 | char pading[255]; 82 | unsigned char data[255]; 83 | pading[length - 1] = '\0'; 84 | sh_itoa(num, data, redix); 85 | if (PRINTF_LEN_FLAG && sh_strlen(data) - 1 < length) { 86 | for (int i = 0; i < length - sh_strlen(data); i++) { 87 | pading[i] = '0'; 88 | } 89 | sh_strcat(pading, data); 90 | if (!print(pading, sh_strlen(pading))) { return -1; } 91 | PRINTF_LEN_FLAG = false; 92 | } else { 93 | if (!print(data, sh_strlen(data))) { return -1; } 94 | } 95 | } 96 | 97 | 98 | static bool print(const unsigned char* data, size_t length){ 99 | const unsigned char* bytes = (const unsigned char*) data; 100 | for (size_t i = 0; i < length; i++) { 101 | if (sh_putchar(bytes[i]) == '\0') { return false; } 102 | } 103 | return true; 104 | } 105 | 106 | 107 | int sh_putchar(int intchar){ 108 | char ch = (char) intchar; 109 | terminal_write(&ch, sizeof(ch)); 110 | return intchar; 111 | } 112 | 113 | 114 | unsigned char sh_getchar(void){ 115 | return getscode(); 116 | } 117 | -------------------------------------------------------------------------------- /src/sh_libc/stdlib.c: -------------------------------------------------------------------------------- 1 | #include "include/stdlib.h" 2 | 3 | void sh_itoa(unsigned long data, unsigned char* str, unsigned int base){ 4 | size_t i = 0; 5 | unsigned long num = data; 6 | unsigned long copynum = data; 7 | unsigned long lorder; 8 | do { 9 | if(base == 16) { 10 | lorder = num & 0xF; 11 | num >>= 4; 12 | } else { 13 | lorder = num; 14 | copynum >>= 27; 15 | } 16 | copynum >>= 4; 17 | do { 18 | data = lorder % base; 19 | if (data < 0x0A) { 20 | str[i++] = '0' + data; 21 | } else { 22 | str[i++] = 'A' + data - 0x0A; 23 | } 24 | lorder /= base; 25 | } while (lorder); 26 | } while (copynum); 27 | str[i] = '\0'; 28 | 29 | sh_strrev(str); 30 | } 31 | -------------------------------------------------------------------------------- /src/sh_libc/string.c: -------------------------------------------------------------------------------- 1 | #include "include/string.h" 2 | 3 | size_t sh_strlen(const uint8_t* str){ 4 | size_t len = 0; 5 | while (str[len]) { ++len; } 6 | return len; 7 | } 8 | 9 | 10 | void sh_strrev(unsigned char* str){ 11 | unsigned char tmp; 12 | size_t len = sh_strlen(str); 13 | for (size_t i = 0, j = len - 1; i < j; i++, j--) { 14 | tmp = str[i]; 15 | str[i] = str[j]; 16 | str[j] = tmp; 17 | } 18 | } 19 | 20 | 21 | char* sh_strcpy(char *dest, const char *src){ 22 | return sh_memcpy(dest, src, sh_strlen(src) + 1); 23 | } 24 | 25 | 26 | 27 | char* sh_strcat(char *s1, const char *s2){ 28 | size_t i = 0, j = 0; 29 | for (i = 0; s1[i] != '\0'; i++); 30 | for (j = 0; s2[j] != '\0'; j++) { 31 | s1[i + j] = s2[j]; 32 | } 33 | s1[i + j] = '\0'; 34 | return s1; 35 | } 36 | 37 | 38 | int sh_strcmp(const char* s1, const char* s2){ 39 | const unsigned char *p1 = (const unsigned char *)s1; 40 | const unsigned char *p2 = (const unsigned char *)s2; 41 | unsigned char c1, c2; 42 | do { 43 | c1 = (unsigned char)*p1++; 44 | c2 = (unsigned char)*p2++; 45 | if (c1 == '\0') { return c1 - c2; } 46 | } while (c1 == c2); 47 | return c1 - c2; 48 | } 49 | 50 | 51 | void* sh_memcpy(void* restrict dst_ptr, 52 | const void* restrict src_ptr, 53 | size_t size){ 54 | unsigned char* dst = (unsigned char*)dst_ptr; 55 | const unsigned char* src = (const unsigned char*)src_ptr; 56 | for (size_t i = 0; i < size; i++) { dst[i] = src[i]; } 57 | return dst_ptr; 58 | } 59 | 60 | 61 | void* sh_memset(void *s, int c, size_t n){ 62 | unsigned char* ptr = (unsigned char *)s; 63 | if (n) { 64 | while (n-- > 0) { *ptr++ = c; } 65 | } 66 | return s; 67 | } 68 | -------------------------------------------------------------------------------- /src/sh_libc/sysdep.c: -------------------------------------------------------------------------------- 1 | #include "include/sysdep.h" 2 | 3 | uint32_t system_call5(uint32_t syscall_num, uint32_t arg1, uint32_t arg2, 4 | uint32_t arg3, uint32_t arg4, uint32_t arg5){ 5 | uint32_t ret; 6 | asm volatile("\tint $0x80\n" 7 | :"=a"(ret) 8 | : "a"(syscall_num), "b"(arg1), "c"(arg2), "d"(arg3), "D"(arg4), \ 9 | "S"(arg5)); 10 | return ret; 11 | } 12 | 13 | 14 | uint32_t system_call4(uint32_t syscall_num, uint32_t arg1, uint32_t arg2, 15 | uint32_t arg3, uint32_t arg4){ 16 | uint32_t ret; 17 | asm volatile("\tint $0x80\n" 18 | :"=a"(ret) 19 | : "a"(syscall_num), "b"(arg1), "c"(arg2), "d"(arg3), "D"(arg4)); 20 | return ret; 21 | } 22 | 23 | 24 | uint32_t system_call3(uint32_t syscall_num, uint32_t arg1, uint32_t arg2, 25 | uint32_t arg3){ 26 | uint32_t ret; 27 | asm volatile("\tint $0x80\n" 28 | :"=a"(ret) 29 | : "a"(syscall_num), "b"(arg1), "c"(arg2), "d"(arg3)); 30 | return ret; 31 | } 32 | 33 | 34 | uint32_t system_call2(uint32_t syscall_num, uint32_t arg1, uint32_t arg2){ 35 | uint32_t ret; 36 | asm volatile("\tint $0x80\n" 37 | :"=a"(ret) 38 | : "a"(syscall_num), "b"(arg1), "c"(arg2)); 39 | return ret; 40 | } 41 | 42 | 43 | uint32_t system_call1(uint32_t syscall_num, uint32_t arg1){ 44 | uint32_t ret; 45 | asm volatile("\tint $0x80\n" 46 | :"=a"(ret) 47 | : "a"(syscall_num), "b"(arg1)); 48 | return ret; 49 | } 50 | --------------------------------------------------------------------------------