Major update

* Fixed a bug in PMM
* Implemented function to retrieve cpuinfo
* Implemented a driver for keyboard
* Implemented a new shell
* Removed debug symbol support
* Added a new data structure 'list'
* Implemented a new Pseudorandom number generator
* Added new string operators
* Updated link.ld
* Fixed all warnings except one in serial.c
* Added a function to read timestamp counter
* Added a function to measure cpu clock speed
* Updated textmode driver
* Updated Makefile
* Incremented kernel version
* Implemented a function to dump contents of a memory address to screen or serial port

Author: Arun007coder

Makefile

@@ -6,7 +6,7 @@ GRUBDIR=
 SCRIPTSDIR=$(SRCDIR)/scripts/
 
 CC=$(TOOLDIR)/i686-elf-gcc
-CFLAGS= -I$(INCLUDEDIR) -I/usr/include -nostdlib -lgcc -fno-builtin -fno-exceptions -fno-leading-underscore -Wno-write-strings -m32 -g
+CFLAGS= -I$(INCLUDEDIR) -I/usr/include -nostdlib -lgcc -fno-builtin -fno-exceptions -fno-leading-underscore -Wall -m32 -g
 
 CXX=$(TOOLDIR)/i686-elf-g++
 CXXFLAGS=
@@ -27,8 +27,8 @@ OBJDUMP = i686-elf-objdump
 OBJCOPYFLAGS = --strip-debug --strip-unneeded
 
 QEMU=qemu-system-i386
-QEMUFLAGS=-cdrom SEOS.iso
-QEMUDFLAGS=-serial file:serial.log -s -S -daemonize
+QEMUFLAGS=-cdrom SEOS.iso -m 1024M
+QEMUDFLAGS=-serial file:serial.log -s -S -daemonize -m 32M
 
 PROJECT=SEOS
 
@@ -45,6 +45,8 @@ OBJECTS= 	$(SRCDIR)/boot/multiboot.o \
 			$(SRCDIR)/drivers/cpu/idt_helper.o \
 			$(SRCDIR)/drivers/cpu/pic.o \
 			$(SRCDIR)/drivers/cpu/pit.o \
+			$(SRCDIR)/drivers/cpu/rdtsc.o \
+			$(SRCDIR)/drivers/cpu/cpuinfo.o \
 			$(SRCDIR)/interrupts/interrupt.o \
 			$(SRCDIR)/interrupts/interrupt_helper.o \
 			$(SRCDIR)/interrupts/exception.o \
@@ -53,35 +55,29 @@ OBJECTS= 	$(SRCDIR)/boot/multiboot.o \
 			$(SRCDIR)/common/libs/string.o \
 			$(SRCDIR)/common/libs/printf.o \
 			$(SRCDIR)/common/libs/bit.o \
-			$(SRCDIR)/common/libs/symbols.o \
-			$(SRCDIR)/common/libs/sym.o \
+			$(SRCDIR)/common/libs/math.o \
+			$(SRCDIR)/common/libs/rng.o \
+			$(SRCDIR)/common/libs/list.o \
 			$(SRCDIR)/drivers/video/vga_text.o \
 			$(SRCDIR)/drivers/io/serial.o \
+			$(SRCDIR)/drivers/input/keyboard.o \
 			$(SRCDIR)/memory/kheap.o \
 			$(SRCDIR)/memory/paging.o \
 			$(SRCDIR)/memory/pmm.o \
+			$(SRCDIR)/kernel/shell.o \
 			$(SRCDIR)/kernel/kernel.o
 
 all: kernel iso
 
 kernel: $(EXECUTABLE)
 iso: $(ISOFILE)
 
-$(EXECUTABLE): get_symboltable $(OBJECTS)
+$(EXECUTABLE): $(OBJECTS)
 	@echo '[LD] $@'
 	@$(LD) $(LDFLAGS) -o $@ $(OBJECTS)
 
 compile_objs: $(OBJECTS)
 
-kernel2:
-	@make get_symboltable
-	@make compile_objs
-	@echo '[LD] $(EXECUTABLE)'
-	@$(LD) $(LDFLAGS) -o $(EXECUTABLE) $(OBJECTS)
-
-
-truecompile: clean kernel2 clean_objs kernel2 iso
-
 $(ISOFILE): $(EXECUTABLE)
 	@echo '[GRUB] $@'
 	@mkdir -p $(PROJECT)/boot/grub
@@ -110,10 +106,10 @@ $(ISOFILE): $(EXECUTABLE)
 	@echo '[NASM] $@'
 	@$(NASM) $(NASMFLAGS) -o $@ $<
 
-run: truecompile
+run: $(ISOFILE)
 	$(QEMU) $(QEMUFLAGS)
 
-rund: truecompile
+rund: $(ISOFILE)
 	$(QEMU) $(QEMUFLAGS) $(QEMUDFLAGS)
 
 stripd: $(EXECUTABLE)
@@ -123,9 +119,6 @@ stripd: $(EXECUTABLE)
 forcerun: clean iso run
 forcerund: clean iso rund
 
-get_symboltable:
-	$(SCRIPTSDIR)/get_symbols.sh $(EXECUTABLE) > $(SRCDIR)/common/libs/symbols.c
-
 PHONY: clean kernel
 clean:
 	@echo 'Cleaning the source directory...'

docs/README.md

@@ -6,15 +6,15 @@
  <h1 align="CENTER">SectorOS-RW4</h1>
 
 <p align="CENTER">
-SectorOS-RW4 is a rewrite 4 operating system project, currently in progress. This README file provides important information about the project, including how to build and run it.
+SectorOS-RW4 is the 4th rewrite of SectorOS project, currently in progress. This README file provides important information about the project, including how to build and run it.
 Kernel Version
 </p>
 <hr>
 <br>
 
 
 ## 🧱 Kernel
-The current kernel version for SectorOS-RW4 is v2.23.03.7NR.<br>
+The current kernel version for SectorOS-RW4 is v3.23.03.8NR.<br>
 
 ## ⚙️ Build Steps
 

docs/bochsrc

@@ -0,0 +1,9 @@
+megs: 32
+ata0-slave: type=cdrom, path=SEOS.iso, status=inserted
+com1: enabled=1, mode=file, dev=serial.log
+speaker: enabled=1, mode=sound
+boot: cdrom
+mouse: enabled=0
+clock: sync=realtime
+cpu: ips=500000000
+display_library: x, options="gui_debug"

docs/changelog.txt

@@ -81,4 +81,23 @@
 * Added new script get_symbols.sh to get symbols from the kernel and put them into symbols.c
 * Updated kernel.c
 * Incremented kernel version
-* Updated README.md
+* Updated README.md
+
+03-04-2023: 02:23 PM IST v3.23.03.8NR
+* Major update
+* Fixed a bug in PMM
+* Implemented function to retrieve cpuinfo
+* Implemented a driver for keyboard
+* Implemented a new shell
+* Removed debug symbol support
+* Added a new data structure 'list'
+* Implemented a new Pseudorandom number generator
+* Added new string operators
+* Updated link.ld
+* Fixed all warnings except one in serial.c
+* Added a function to read timestamp counter
+* Added a function to measure cpu clock speed
+* Updated textmode driver
+* Updated Makefile
+* Incremented kernel version
+* Implemented a function to dump contents of a memory address to screen or serial port

src/backup/symbols.c

@@ -6,7 +6,7 @@ vaddr = off + paddr;
 
 SECTIONS
 {
-    . = 0xC0100000;
+    . = vaddr;
     .text ALIGN(4K) : AT(ADDR(.text)-0xC0000000)
     {
         *(.multiboot)

src/boot/link.ld

@@ -9,4 +9,4 @@
 .align 4
 .long MAGIC
 .long FLAGS
-.long CHECKSUM
+.long CHECKSUM