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Logger and working GDT

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This commit is contained in:
Benjamin Kyd
2019-04-27 23:35:28 +01:00
parent bda171256f
commit 6be1414484
15 changed files with 236 additions and 19 deletions
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1
.gitignore vendored
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@@ -4,3 +4,4 @@ Makefile
cmake_install.cmake
.vscode/
.vs/
bx_enh_dbg.ini

4
CMakeLists.txt
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@@ -22,12 +22,14 @@ file(GLOB DRIV_DISP_VGA "kernel/drivers/terminal/*.cpp" "kernel/drivers/termina
# Lib source
file(GLOB LIB_STD "lib/std/*.cpp" "lib/std/*.asm")
file(GLOB LIB_KERN_LOG "lib/kernel/logger/*.cpp" "lib/kernel/logger/*.asm")
add_executable(OwOS ${KERN_SRC} ${KERN_LIB_SRC}
${DRIV_DISP_VGA}
${LIB_STD})
${LIB_STD} ${LIB_KERN_LOG})
set_target_properties(OwOS PROPERTIES OUTPUT_NAME "OwOS.bin")

56
bochsrc.bxrc Normal file
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@@ -0,0 +1,56 @@
# configuration file generated by Bochs
plugin_ctrl: unmapped=1, biosdev=1, speaker=1, extfpuirq=1, parallel=1, serial=1, gameport=1
config_interface: win32config
display_library: win32, options="gui_debug"
memory: host=32, guest=32
romimage: file="C:\Program Files (x86)\Bochs-2.6.9/BIOS-bochs-latest", address=0x0, options=none
vgaromimage: file="C:\Program Files (x86)\Bochs-2.6.9/VGABIOS-lgpl-latest"
boot: cdrom
floppy_bootsig_check: disabled=0
# no floppya
# no floppyb
ata0: enabled=1, ioaddr1=0x1f0, ioaddr2=0x3f0, irq=14
ata0-master: type=cdrom, path="E:\OS\OwOS\build\OwOS.iso", status=inserted, model="Generic 1234", biosdetect=auto
ata0-slave: type=none
ata1: enabled=1, ioaddr1=0x170, ioaddr2=0x370, irq=15
ata1-master: type=none
ata1-slave: type=none
ata2: enabled=0
ata3: enabled=0
optromimage1: file=none
optromimage2: file=none
optromimage3: file=none
optromimage4: file=none
optramimage1: file=none
optramimage2: file=none
optramimage3: file=none
optramimage4: file=none
pci: enabled=1, chipset=i440fx
vga: extension=vbe, update_freq=5, realtime=1
cpu: count=1, ips=4000000, model=bx_generic, reset_on_triple_fault=1, cpuid_limit_winnt=0, ignore_bad_msrs=1, mwait_is_nop=0
cpuid: level=6, stepping=3, model=3, family=6, vendor_string="GenuineIntel", brand_string=" Intel(R) Pentium(R) 4 CPU "
cpuid: mmx=1, apic=xapic, simd=sse2, sse4a=0, misaligned_sse=0, sep=1, movbe=0, adx=0
cpuid: aes=0, sha=0, xsave=0, xsaveopt=0, x86_64=1, 1g_pages=0, pcid=0, fsgsbase=0
cpuid: smep=0, smap=0, mwait=1, vmx=1
print_timestamps: enabled=0
port_e9_hack: enabled=0
private_colormap: enabled=0
clock: sync=none, time0=local, rtc_sync=0
# no cmosimage
# no loader
log: -
logprefix: %t%e%d
debug: action=ignore
info: action=report
error: action=report
panic: action=ask
keyboard: type=mf, serial_delay=250, paste_delay=100000, user_shortcut=none
mouse: type=ps2, enabled=0, toggle=ctrl+mbutton
sound: waveoutdrv=win, waveout=none, waveindrv=win, wavein=none, midioutdrv=win, midiout=none
speaker: enabled=1, mode=sound
parport1: enabled=1, file=none
parport2: enabled=0
com1: enabled=1, mode=null
com2: enabled=0
com3: enabled=0
com4: enabled=0

BIN
build/OwOS.bin
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Binary file not shown.

BIN
build/OwOS.iso
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Binary file not shown.

BIN
iso/boot/OwOS.bin
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Binary file not shown.

6
kernel.asm
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@@ -37,10 +37,10 @@ _start:
jmp 1b
.global ASM_INIT_FPU
.type ASM_INIT_FPU, @function
.global INIT_FPU
.type INIT_FPU, @function
ASM_INIT_FPU:
INIT_FPU:
# FPU Config
VAL_037F:
.hword 0x037F

41
kernel.cpp
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@@ -1,10 +1,17 @@
#include <lib/std/stdlib.h>
#include <kernel/multiboot.h>
#include <lib/kernel/logger/logger.h>
#include <kernel/drivers/terminal/terminal.h>
#include <kernel/kernio.h>
#include <kernel/gdt.h>
#include <lib/std/stdlib.h>
#include <lib/std/memory.h>
#include <lib/kernel/logger/logger.h>
#define BochsBreak() outw(0x8A00,0x8A00); outw(0x8A00,0x08AE0);
extern "C" {
extern void ASM_INIT_FPU(void);
extern void INIT_FPU(void);
}
extern "C"
@@ -13,23 +20,29 @@ int kernel_main(uint32_t magic, multibootInfo_t* multiboot) {
cls();
showCursor();
setFGColour(VGA_GREEN);
write("OwOS V0.2 ");
writeln("Starting Up...");
writeln("OwOS V0.2 Starting Up...");
setFGColour(VGA_WHITE);
nline();
// Init systems
write("OwO, What's This? ");
write("*notices ");
write(itoa(multiboot->mem_upper / 1024));
write("mb of ram*");
initGDT();
loggerOK("GDT Loaded");
nline(); nline();
write("OwO, What's This?");
setFGColour(VGA_BRIGHT_MAGENTA);
nline(); nline(); nline();
ASM_INIT_FPU();
write(" *notices ");
write(itoa(multiboot->mem_upper / 1024));
writeln("mb of ram*");
setFGColour(VGA_WHITE);
nline();
setFGColour(VGA_YELLOW);
writeln("Welcome to OwOS");
setFGColour(VGA_BRIGHT_MAGENTA);
write("~#");
for (;;)

50
kernel/gdt.cpp
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@@ -0,0 +1,50 @@
#include "gdt.h"
#include <kernel/kernio.h>
#include <lib/std/memory.h>
struct SegmentDescriptor_t {
uint16_t limit_0;
uint16_t base_0;
uint8_t base_1;
uint8_t access;
uint8_t limit_1:4;
uint8_t flags:4;
uint8_t base_2;
} __attribute__((packed));
SegmentDescriptor_t _GDT[256];
void lgdt(void* GDT, uint16_t size) {
struct {
uint16_t size;
void* GDT;
} __attribute__((packed)) GDTR = { size, GDT };
asm ( "lgdt %0" : : "m"(GDTR) );
}
void initGDT() {
memset(&_GDT, 0, sizeof(_GDT));
// Leave 0 blank for null segment
// Code Base 0 limit 32 Access EXEC + RW
setGDT(1, 0x00000000, 0xFFFFFFFF, GDT_ACCESS_PRESENT | GDT_ACCESS_EXEC | GDT_ACCESS_RW, GDT_FLAG_GR_PAGE | GDT_FLAG_SZ_32B);
// Data Base 0 Limit 32 Access RW
setGDT(2, 0x00000000, 0xFFFFFFFF, GDT_ACCESS_PRESENT | GDT_ACCESS_RW, GDT_FLAG_GR_PAGE | GDT_FLAG_SZ_32B);
lgdt(&_GDT, sizeof(_GDT));
SEGMENTS_RELOAD();
}
void setGDT(uint32_t index, uint32_t baseAddr, uint32_t limitAddr, uint8_t accessLvl, uint8_t flags) {
if (index > 256) return;
_GDT[index].base_0 = (baseAddr >> 0) & 0xFFFF;
_GDT[index].base_1 = (baseAddr >> 16) & 0xFF;
_GDT[index].base_2 = (baseAddr>> 24) & 0xFF;
_GDT[index].limit_0 = (limitAddr >> 0) & 0xFFFF;
_GDT[index].limit_1 = (limitAddr >> 16) & 0x0F;
_GDT[index].access = accessLvl;
_GDT[index].flags = flags & 0x0F;
}

23
kernel/gdt.h
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@@ -0,0 +1,23 @@
#pragma once
#include <lib/stdint.h>
#define GDT_ACCESS_PRESENT 0x90
#define GDT_ACCESS_PR_TSS 0x80
#define GDT_ACCESS_PRIV_3 0x60
#define GDT_ACCESS_PRIV_2 0x40
#define GDT_ACCESS_PRIV_1 0x20
#define GDT_ACCESS_EXEC 0x08
#define GDT_ACCESS_DIR_D 0x04
#define GDT_ACCESS_RW 0x02
#define GDT_ACCESS_ACCESSED 0x01
#define GDT_FLAG_GR_PAGE 0x08
#define GDT_FLAG_SZ_32B 0x04
extern "C" {
extern void SEGMENTS_RELOAD(void);
}
void initGDT();
void setGDT(uint32_t index, uint32_t baseAddr, uint32_t limitAddr, uint8_t accessLvl, uint8_t flags);

1
kernel/kernio.cpp
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@@ -1 +0,0 @@
#include "kernio.h"

30
kernel/kernio.h
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@@ -14,3 +14,33 @@ inline uint8_t inb(uint16_t port) {
return ret;
}
static inline uint16_t inw(uint16_t port) {
uint16_t ret;
asm ( "inw %1, %0"
: "=a"(ret)
: "Nd"(port) );
return ret;
}
static inline void outw(uint16_t port, uint16_t val) {
asm ( "outw %0, %1" : : "a"(val), "Nd"(port) );
}
static inline uint32_t inl(uint16_t port) {
uint32_t ret;
asm ( "inl %1, %0"
: "=a"(ret)
: "Nd"(port) );
return ret;
}
static inline void outl(uint16_t port, uint32_t val) {
asm ( "outl %0, %1" : : "a"(val), "Nd"(port) );
}
static inline void io_wait(void) {
/* TODO: This is probably fragile. */
asm ( "jmp 1f\n\t"
"1:jmp 2f\n\t"
"2:" );
}

13
kernel/segment.asm Normal file
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@@ -0,0 +1,13 @@
.global SEGMENTS_RELOAD
SEGMENTS_RELOAD:
ljmp $0x08, $reloadCS
reloadCS:
movw $0x10, %ax
movw %ax, %es
movw %ax, %ss
movw %ax, %ds
movw %ax, %fs
movw %ax, %gs
ret

26
lib/kernel/logger/logger.cpp
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@@ -0,0 +1,26 @@
#include "logger.h"
#include <kernel/drivers/terminal/terminal.h>
void loggerLog(char* str) {
write(" ");
writeln(str);
}
void loggerOK(char* str) {
write("[");
setFGColour(VGA_BRIGHT_GREEN);
write(" OK ");
setFGColour(VGA_WHITE);
write("] ");
writeln(str);
}
void loggerFailed(char* str) {
write("[");
setFGColour(VGA_BRIGHT_RED);
write("FAILED");
setFGColour(VGA_WHITE);
write("] ");
writeln(str);
}

4
lib/kernel/logger/logger.h
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@@ -1,4 +1,8 @@
// [FAILED]
// [ OK ]
#pragma once
void loggerLog(char* str);
void loggerOK(char* str);
void loggerFailed(char* str);