Mathieu Maret
5 years ago
commit
c60f7450eb
103 changed files with 18454 additions and 0 deletions
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SOS: A Simple Operating System |
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Compilation/Installation/Test instructions |
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Compilation |
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=========== |
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|
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IMPORTANT |
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--------- |
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Don't forget to run 'make clean' before 'make' after you have modified |
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any source or header file(s). |
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On a x86 host where grub is correctly installed |
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----------------------------------------------- |
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Simply run 'make' |
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On a non-x86 host (without grub of course !) |
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-------------------------------------------- |
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See extra/README |
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On an x86 host without Grub, or with a buggy Grub |
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------------------------------------------------- |
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See extra/README |
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How do I know I have a buggy grub installation ? Answer: in the qemu |
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PC emulator, Grub hangs while loading the kernel |
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Installation |
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============ |
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Nothing special to do besides compiling |
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Test the SOS Kernel |
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=================== |
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On a x86 real machine with Grub installed |
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----------------------------------------- |
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1st method |
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=> Boot the sos.elf file (append 'kernel=<path_to>sos.elf' in the |
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menu.lst or type it on Grub's command line) from a hard disk, a |
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floppy, or from the network |
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2nd method |
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=> Copy the file 'fd.img' to a floppy and boot from it |
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On a x86 real machine without Grub installed |
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-------------------------------------------- |
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1st method |
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=> see extra/README to compile with the grub floppy image we provide, |
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copy the file 'fd.img' to a floppy, and boot from it |
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|
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2nd method |
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=> see extra/README to compile with the boot sector we provide (up to |
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article 2 only), copy the file 'extra/sos_bsect.img' to a floppy, |
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and boot from it |
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Inside a PC emulator (x86 and non-x86 hosts) |
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-------------------------------------------- |
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Tested on both the bochs emulator (x86/linux, sparc/solaris and |
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ppc/linux hosts, 'apt-get install bochs-x vgabios' on debian |
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testing/unstable), and the qemu system emulator (with libsdl |
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installed: 'apt-get install libsdl1.2-dev' on debian |
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testing/unstable). |
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1/ Grub is installed on the host (x86 hosts only) |
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- - - - - - - - - - - - - - - - - - - - - - - - - |
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bochs: boot from the file 'fd.img'. Example of a ~/.bochsrc: |
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floppya: 1_44=/home/d2/sos/fd.img, status=inserted |
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romimage: file=/usr/share/bochs/BIOS-bochs-latest, address=0xf0000 |
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vgaromimage: /usr/share/vgabios/vgabios.bin |
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megs:63 # 63 Mo de RAM |
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qemu: run 'qemu -fda fd.img' |
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If grub hangs while loading the kernel, please go to method 2/ |
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2/ Grub is not installed (all hosts) |
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- - - - - - - - - - - - - - - - - - |
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See extra/README to generate a floppy image with the Grub floppy |
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image we provide, and: |
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bochs: boot from the file 'fd.img' |
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qemu: run 'qemu -fda fd.img' |
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3/ Bonus: boot with the bootsector we provide (all hosts, up to art. 2 ONLY !) |
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- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - |
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See extra/README to generate a floppy image with the boot sector we |
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provide, and: |
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bochs: boot from the file 'extra/sos_bsect.img' |
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qemu: run 'qemu -fda extra/sos_qemu.img' |
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NOTE: After article 2, this way of booting is not supported: please |
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use the method 2/ above. |
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NOTE : recommended versions of the tools |
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---------------------------------------- |
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- OS : Linux 2.6.11.7-d2-1 i686 |
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- gcc : gcc (GCC) 3.3.5 (Debian 1:3.3.5-8) |
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- GNU binutils : GNU ld version 2.15 |
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- GNU make : GNU Make 3.80 |
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Also tested with (on ppc/debian host): |
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- OS : Linux 2.6.10-powerpc ppc |
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- gcc : gcc (GCC) 3.2.2 |
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- GNU binutils : GNU ld version 2.13.2 |
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- GNU make : GNU Make 3.80 |
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-- |
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David Decotigny |
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@ -0,0 +1,83 @@
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## Copyright (C) 2004,2005 The SOS Team
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##
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## This program is free software; you can redistribute it and/or
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## modify it under the terms of the GNU General Public License
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## as published by the Free Software Foundation; either version 2
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## of the License, or (at your option) any later version.
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##
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## This program is distributed in the hope that it will be useful,
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## but WITHOUT ANY WARRANTY; without even the implied warranty of
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## MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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## GNU General Public License for more details.
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##
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## You should have received a copy of the GNU General Public License
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## along with this program; if not, write to the Free Software
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## Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307,
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## USA.
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CC=gcc
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LD=ld
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CFLAGS = -Wall -nostdinc -ffreestanding -DKERNEL_SOS
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LIBGCC := $(shell $(CC) -print-libgcc-file-name) # To benefit from FP/64bits artihm.
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LDFLAGS = --warn-common -nostdlib
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OBJECTS = bootstrap/multiboot.o \
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hwcore/idt.o hwcore/gdt.o \
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hwcore/swintr.o hwcore/swintr_wrappers.o \
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hwcore/exception.o hwcore/exception_wrappers.o \
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hwcore/irq.o hwcore/irq_wrappers.o hwcore/i8259.o \
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hwcore/paging.o \
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hwcore/i8254.o drivers/x86_videomem.o drivers/bochs.o \
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hwcore/cpu_context.o hwcore/cpu_context_switch.o \
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hwcore/mm_context.o \
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sos/kmem_vmm.o sos/kmem_slab.o sos/kmalloc.o \
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sos/physmem.o sos/klibc.o \
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sos/thread.o sos/kwaitq.o \
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sos/time.o sos/sched.o sos/ksynch.o \
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sos/process.o sos/syscall.o \
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sos/assert.o sos/main.o sos/mouse_sim.o \
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sos/uaccess.o sos/calcload.o \
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userland/userprogs.kimg sos/test-art7.o
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KERNEL_OBJ = sos.elf
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MULTIBOOT_IMAGE = fd.img
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PWD := $(shell pwd)
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# Main target
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all: $(MULTIBOOT_IMAGE) |
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$(MULTIBOOT_IMAGE): $(KERNEL_OBJ) |
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./support/build_image.sh $@ $<
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$(KERNEL_OBJ): $(OBJECTS) ./support/sos.lds |
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$(LD) $(LDFLAGS) -T ./support/sos.lds -o $@ $(OBJECTS) $(LIBGCC)
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-nm -C $@ | cut -d ' ' -f 1,3 > sos.map
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size $@
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-include .mkvars |
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# Create the userland programs to include in the kernel image
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userland/userprogs.kimg: FORCE |
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$(MAKE) -C userland
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# Create objects from C source code
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%.o: %.c |
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$(CC) -I$(PWD) -c $< $(CFLAGS) -o $@
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# Create objects from assembler (.S) source code
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%.o: %.S |
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$(CC) -I$(PWD) -c $< $(CFLAGS) -DASM_SOURCE=1 -o $@
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FORCE: |
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@
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# Clean directory
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clean: |
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$(RM) *.img *.o mtoolsrc *~ menu.txt *.img *.elf *.bin *.map
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$(RM) *.log *.out bochs*
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$(RM) bootstrap/*.o bootstrap/*~
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$(RM) drivers/*.o drivers/*~
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$(RM) hwcore/*.o hwcore/*~
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$(RM) sos/*.o sos/*~
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$(RM) support/*~
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$(RM) extra/*~
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$(MAKE) -C userland clean
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@ -0,0 +1,90 @@
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SOS: A Simple Operating System |
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This is SOS, a Simple Operating System for i386-family |
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processors. This is as simple as possible to show a way to program a |
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basic Operating System on real common hardware (PC). The code should |
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be easily readable and understandable thanks to frequent comments, and |
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references to external documentation. We chose to implement the basic |
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features of an OS, thus making design decisions targetting towards |
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simplicity of understanding, covering most of the OS classical |
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concepts, but not aiming at proposing yet another full-fledged |
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competitive OS (Linux is quite good at it). However, for those who |
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would like to propose some enhancements, we are open to any code |
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suggestions (patches only, please). And yes, there might be bugs in |
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the code, so please send us any bug report, and/or patches ! |
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The OS comes as a set of articles (in french) to be published in the |
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journal "Linux Magazine France". Each month, the part of the code |
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related to the current article's theme is released (see VERSION file), |
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and the resulting OS can be successfully compiled and run, by booting |
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it from a floppy on a real machine (tested AMD k7, Cyrix and Intel P4 |
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pentiums), or through an x86 emulator (bochs or qemu). The resulting |
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OS is available as a multiboot compliant ELF kernel (sos.elf) and as a |
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floppy image (fd.img). It provides a very very very basic demo whose |
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aim is to understand how everything works, not to animate sprites on |
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the screen with 5:1 dolby sound. |
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|
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The initial technical features and lack-of-features of the OS are: |
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- monolithic kernel, fully interruptible, non-preemptible (big kernel |
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lock), target machines = i386 PC or better |
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- compiles on any host where the gcc/binutils toolchain (target |
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i586-gnu) is available. Can be tested on real i486/pentium |
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hardware, or on any host that can run an i486/pentium PC emulator |
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(bochs or qemu) |
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- kernel loaded by grub, or by a sample bootsector (up to article 2 |
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ONLY) |
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- clear separation of physical memory and virtual memory concepts, |
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even inside the kernel: no identity-mapping of the physical memory |
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inside the kernel (allows to move virtual mappings of kernel pages |
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at run-time, eg to free ISA DMA pages, and to avercome the 4G RAM |
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barrier) |
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- slab-type kernel memory allocation |
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- no swap, no reverse mapping |
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- VERY simple drivers: keyboard, x86 video memory, IDE disks |
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- logical devices: partitions, FAT filesystem, "hard-coded" |
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mountpoints only (~ MSDOS) |
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- no network stack |
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- user-level features: ELF loader (no shared libraries), processes, |
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user threads (kernel-level scheduling only), mmap API, basic VFS |
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|
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To understand where to look at for what, here is a brief description: |
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- Makefile: the (ONLY) makefile of the OS. Targets are basically |
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'all' and 'clean' |
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- bootstrap/ directory: code to load the kernel. Both the stuff |
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needed for a multiboot-compliant loader (eg grub) AND a bootsector |
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are provided. The bootsector may only be used up to article 2. |
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- sos/ directory: the entry routine for the kernel (main.c), various |
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systemwide header files, a set of common useful C routines |
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("nano-klibc"), and kernel subsystems (kernel memory management, |
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etc...) |
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- hwcore/ directory: Low-level CPU- and kernel-related routines |
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(interrupt/exception management, translation tables and segment |
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registers, ...) |
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- drivers/ directory: basic kernel drivers for various (non CPU) |
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devices (keyboard, x86 video memory, bochs 0xe9 port, ...). Used |
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mainly for debugging |
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- support/ directory: scripts and configuration files to build the |
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floppy images |
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- extra/ directory: a set of configuration files to be customized for |
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non-x86 host installations (yes, we primarily develop SOS on a ppc, for |
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the x86 target of course), or for grub-less installations. See |
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README file in this directory. |
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The code is licensed under the terms of the GNU GPL version 2 (see |
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LICENSE file). |
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Enjoy ! |
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David Decotigny, Thomas Petazzoni, the Kos team |
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http://sos.enix.org/ |
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http://david.decotigny.free.fr/ |
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http://kos.enix.org/~thomas/ |
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http://kos.enix.org/ |
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-- |
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David Decotigny |
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PS: Made with a Mac. |
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@ -0,0 +1,11 @@
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SOS -- Simple OS |
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Copyright (C) 2003,2004,2005 The SOS Team (David Decotigny & Thomas Petazzoni) |
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Version "Article 7 (1st part)" -- Basic user programs support |
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This program is free software; you can redistribute it and/or |
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modify it under the terms of the GNU General Public License |
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as published by the Free Software Foundation; either version 2 |
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of the License, or (at your option) any later version. |
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|
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See the LICENSE file included in the distribution. |
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@ -0,0 +1,85 @@
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/* Copyright (C) 1999 Free Software Foundation, Inc. |
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|
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This program is free software; you can redistribute it and/or
|
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modify it under the terms of the GNU General Public License |
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as published by the Free Software Foundation; either version 2
|
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of the License, or (at your option) any later version. |
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|
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This program is distributed in the hope that it will be useful, |
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but WITHOUT ANY WARRANTY; without even the implied warranty of
|
||||
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
||||
GNU General Public License for more details. |
||||
|
||||
You should have received a copy of the GNU General Public License |
||||
along with this program; if not, write to the Free Software
|
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Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, |
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USA.
|
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*/ |
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/* The operating system is booted by Grub, so we almost have nothing |
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to do to boot it. We only have to conform to the Multiboot |
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standard, as defined by the Grub documentation */ |
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#define ASM 1 |
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/* The multiboot.h header contains a lot of multiboot standard |
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definitions */ |
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#include "multiboot.h" |
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/* The multiboot header itself. It must come first. */ |
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.section ".multiboot" |
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/* Multiboot header must be aligned on a 4-byte boundary */ |
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.align 4
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multiboot_header: |
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/* magic= */ .long MULTIBOOT_HEADER_MAGIC
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/* flags= */ .long MULTIBOOT_HEADER_FLAGS
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/* checksum= */ .long -(MULTIBOOT_HEADER_MAGIC \ |
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+MULTIBOOT_HEADER_FLAGS) |
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/* header_addr= */ .long multiboot_header
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/* load_addr= */ .long __b_load
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/* load_end_addr=*/ .long __e_load
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/* bss_end_addr= */ .long __e_kernel
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/* entry_addr= */ .long multiboot_entry
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/* Here is the beginning of the code of our operating system */ |
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.text |
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.globl start, _start |
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start: |
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_start: |
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multiboot_entry: |
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/* Set up a stack */ |
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movl $(stack + MULTIBOOT_STACK_SIZE), %ebp |
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movl %ebp, %esp |
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|
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/* Set EFLAGS to 0 */ |
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pushl $0 |
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/* pop stack into the EFLAGS register */ |
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popf |
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/* Push the magic and the address on the stack, so that they |
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will be the parameters of the cmain function */ |
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pushl %ebx |
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pushl %eax |
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|
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/* Call the cmain function (os.c) */ |
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call EXT_C(sos_main) |
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/* Should never get there */ |
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loop: |
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hlt |
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jmp loop |
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|
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/* Here is the stack */ |
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.section ".init_stack", "aw", @nobits
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.size stack, MULTIBOOT_STACK_SIZE |
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stack: |
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.space MULTIBOOT_STACK_SIZE
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|
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/* Some data characterizing the stack addresses */ |
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.data |
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.globl bootstrap_stack_bottom
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bootstrap_stack_bottom: .long stack |
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|
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.globl bootstrap_stack_size
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bootstrap_stack_size: .long MULTIBOOT_STACK_SIZE |
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@ -0,0 +1,133 @@
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#ifndef __MULTIBOOT_H__ |
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#define __MULTIBOOT_H__ |
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|
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/* multiboot.h - the header for Multiboot */ |
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/* Copyright (C) 1999 Free Software Foundation, Inc.
|
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|
||||
This program is free software; you can redistribute it and/or modify |
||||
it under the terms of the GNU General Public License as published by |
||||
the Free Software Foundation; either version 2 of the License, or |
||||
(at your option) any later version. |
||||
|
||||
This program is distributed in the hope that it will be useful, |
||||
but WITHOUT ANY WARRANTY; without even the implied warranty of |
||||
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
||||
GNU General Public License for more details. |
||||
|
||||
You should have received a copy of the GNU General Public License |
||||
along with this program; if not, write to the Free Software |
||||
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */ |
||||
|
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/* Macros. */ |
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|
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/* The magic number for the Multiboot header. */ |
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#define MULTIBOOT_HEADER_MAGIC 0x1BADB002 |
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|
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/* The flags for the Multiboot header. */ |
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#define MULTIBOOT_HEADER_FLAGS 0x00010003 |
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|
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/* The magic number passed by a Multiboot-compliant boot loader. */ |
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#define MULTIBOOT_BOOTLOADER_MAGIC 0x2BADB002 |
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|
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/* The size of our stack (16KB). */ |
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#define MULTIBOOT_STACK_SIZE 0x4000 |
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|
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#define MULTIBOOT_CMDLINE 4 |
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#define MULTIBOOT_MODS 8 |
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|
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/* C symbol format. HAVE_ASM_USCORE is defined by configure. */ |
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#ifdef HAVE_ASM_USCORE |
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# define EXT_C(sym) _ ## sym |
||||
#else |
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# define EXT_C(sym) sym |
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#endif |
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|
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#ifndef ASM |
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/* Do not include here in the assembler sources. */ |
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|
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#include <sos/types.h> |
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|
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/* The address of the stack of the bootstrap thread */ |
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extern sos_vaddr_t bootstrap_stack_bottom; |
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extern sos_size_t bootstrap_stack_size; |
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|
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/* Types. */ |
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|
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/* The Multiboot header. */ |
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typedef struct multiboot_header |
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{ |
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unsigned long magic; |
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unsigned long flags; |
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unsigned long checksum; |
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unsigned long header_addr; |
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unsigned long load_addr; |
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unsigned long load_end_addr; |
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unsigned long bss_end_addr; |
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unsigned long entry_addr; |
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} multiboot_header_t; |
||||
|
||||
/* The symbol table for a.out. */ |
||||
typedef struct aout_symbol_table |
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{ |
||||
unsigned long tabsize; |
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unsigned long strsize; |
||||
unsigned long addr; |
||||
unsigned long reserved; |
||||
} aout_symbol_table_t; |
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|
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/* The section header table for ELF. */ |
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typedef struct elf_section_header_table |
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{ |
||||
unsigned long num; |
||||
unsigned long size; |
||||
unsigned long addr; |
||||
unsigned long shndx; |
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} elf_section_header_table_t; |
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|
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/* The Multiboot information. */ |
||||
typedef struct multiboot_info |
||||
{ |
||||
unsigned long flags; |
||||
unsigned long mem_lower; |
||||
unsigned long mem_upper; |
||||
unsigned long boot_device; |
||||
unsigned long cmdline; |
||||
unsigned long mods_count; |
||||
unsigned long mods_addr; |
||||
union |
||||
{ |
||||
aout_symbol_table_t aout_sym; |
||||
elf_section_header_table_t elf_sec; |
||||
} u; |
||||
unsigned long mmap_length; |
||||
unsigned long mmap_addr; |
||||
unsigned long drives_length; |
||||
unsigned long drives_addr; |
||||
} multiboot_info_t; |
||||
|
||||
/* The module structure. */ |
||||
typedef struct module |
||||
{ |
||||
unsigned long mod_start; |
||||
unsigned long mod_end; |
||||
unsigned long string; |
||||
unsigned long reserved; |
||||
} module_t; |
||||
|
||||
/* The memory map. Be careful that the offset 0 is base_addr_low
|
||||
but no size. */ |
||||
typedef struct memory_map |
||||
{ |
||||
unsigned long size; |
||||
unsigned long base_addr_low; |
||||
unsigned long base_addr_high; |
||||
unsigned long length_low; |
||||
unsigned long length_high; |
||||
unsigned long type; |
||||
} memory_map_t; |
||||
|
||||
void dump_multiboot_info(multiboot_info_t *mbi); |
||||
|
||||
#endif /* ! ASM */ |
||||
|
||||
#endif /* __MULTIBOOT_H__ */ |
||||
@ -0,0 +1,123 @@
|
||||
/* Copyright (C) 2004 David Decotigny
|
||||
|
||||
This program is free software; you can redistribute it and/or |
||||
modify it under the terms of the GNU General Public License |
||||
as published by the Free Software Foundation; either version 2 |
||||
of the License, or (at your option) any later version. |
||||
|
||||
This program is distributed in the hope that it will be useful, |
||||
but WITHOUT ANY WARRANTY; without even the implied warranty of |
||||
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
||||
GNU General Public License for more details. |
||||
|
||||
You should have received a copy of the GNU General Public License |
||||
along with this program; if not, write to the Free Software |
||||
Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, |
||||
USA.
|
||||
*/ |
||||
#include <hwcore/ioports.h> |
||||
#include <sos/klibc.h> |
||||
|
||||
#include "bochs.h" |
||||
|
||||
/* This is a special hack that is only useful when running the
|
||||
operating system under the Bochs emulator. */ |
||||
#define SOS_BOCHS_IOPORT 0xe9 |
||||
|
||||
sos_ret_t sos_bochs_setup(void) |
||||
{ |
||||
return SOS_OK; |
||||
} |
||||
|
||||
#define _putchar(chr) \ |
||||
outb((chr), SOS_BOCHS_IOPORT) |
||||
|
||||
sos_ret_t sos_bochs_putchar(char c) |
||||
{ |
||||
_putchar(c); |
||||
|
||||
return SOS_OK; |
||||
} |
||||
|
||||
sos_ret_t sos_bochs_putstring(const char* str) |
||||
{ |
||||
for ( ; str && (*str != '\0') ; str++) |
||||
_putchar(*str); |
||||
|
||||
return SOS_OK; |
||||
} |
||||
|
||||
sos_ret_t sos_bochs_puthex(unsigned val, int nbytes) |
||||
{ |
||||
unsigned c; |
||||
|
||||
#define BOCHS_PRTHEX(q) \ |
||||
({ unsigned char r; if ((q) >= 10) r='a'+(q)-10; \
|
||||
else r='0'+(q); _putchar(r); }) |
||||
|
||||
switch (nbytes) |
||||
{ |
||||
case 4: |
||||
c = (val >> 24) & 0xff; |
||||
BOCHS_PRTHEX((c >> 4)&0xf); |
||||
BOCHS_PRTHEX(c&0xf); |
||||
case 3: |
||||
c = (val >> 16) & 0xff; |
||||
BOCHS_PRTHEX((c >> 4)&0xf); |
||||
BOCHS_PRTHEX(c&0xf); |
||||
case 2: |
||||
c = (val >> 8) & 0xff; |
||||
BOCHS_PRTHEX((c >> 4)&0xf); |
||||
BOCHS_PRTHEX(c&0xf); |
||||
case 1: |
||||
c = val & 0xff; |
||||
BOCHS_PRTHEX((c >> 4)&0xf); |
||||
BOCHS_PRTHEX(c&0xf); |
||||
} |
||||
|
||||
return SOS_OK; |
||||
} |
||||
|
||||
|
||||
sos_ret_t sos_bochs_hexdump(const void* addr, int nbytes) |
||||
{ |
||||
int offs; |
||||
for (offs = 0 ; offs < nbytes ; offs++) |
||||
{ |
||||
const unsigned char *c; |
||||
|
||||
if ((offs % 16) == 0) |
||||
{ |
||||
sos_bochs_putstring("0x"); |
||||
sos_bochs_puthex(offs, 4); |
||||
} |
||||
|
||||
if ((offs % 8) == 0) |
||||
sos_bochs_putstring(" "); |
||||
|
||||
c = (const unsigned char*)(addr + offs); |
||||
sos_bochs_puthex(*c, 1); |
||||
sos_bochs_putstring(" "); |
||||
|
||||
if (((offs + 1) % 16) == 0) |
||||
sos_bochs_putstring("\n"); |
||||
} |
||||
|
||||
if (offs % 16) |
||||
sos_bochs_putstring("\n"); |
||||
|
||||
return SOS_OK; |
||||
} |
||||
|
||||
|
||||
sos_ret_t sos_bochs_printf(const char *format, /* args */...) |
||||
{ |
||||
char buff[256]; |
||||
va_list ap; |
||||
|
||||
va_start(ap, format); |
||||
vsnprintf(buff, sizeof(buff), format, ap); |
||||
va_end(ap); |
||||
|
||||
return sos_bochs_putstring(buff); |
||||
} |
||||
@ -0,0 +1,55 @@
|
||||
/* Copyright (C) 2004 David Decotigny
|
||||
|
||||
This program is free software; you can redistribute it and/or |
||||
modify it under the terms of the GNU General Public License |
||||
as published by the Free Software Foundation; either version 2 |
||||
of the License, or (at your option) any later version. |
||||
|
||||
This program is distributed in the hope that it will be useful, |
||||
but WITHOUT ANY WARRANTY; without even the implied warranty of |
||||
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
||||
GNU General Public License for more details. |
||||
|
||||
You should have received a copy of the GNU General Public License |
||||
along with this program; if not, write to the Free Software |
||||
Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, |
||||
USA.
|
||||
*/ |
||||
#ifndef _SOS_BOCHS_H_ |
||||
#define _SOS_BOCHS_H_ |
||||
|
||||
/**
|
||||
* @file bochs.h |
||||
* |
||||
* If you compiled Bochs with the --enable-e9-hack, then any character |
||||
* printed to the 0xE9 I/O port is printed to the xterm that is |
||||
* running Bochs. This may appear to be a detail, but in fact, this |
||||
* functionnality is *VERY* precious for debugging purposes. This |
||||
* """driver""" handles this feature. |
||||
*/ |
||||
|
||||
#include <sos/errno.h> |
||||
#include <sos/types.h> |
||||
|
||||
sos_ret_t sos_bochs_setup(void); |
||||
|
||||
sos_ret_t sos_bochs_putchar(char c); |
||||
|
||||
sos_ret_t sos_bochs_putstring(const char* str); |
||||
|
||||
/** Print the least signficant 32 (nbytes == 4), 24 (nbytes == 3), 16
|
||||
(nbytes == 2) or 8 (nbytes == 1) bits of val in hexadecimal. */ |
||||
sos_ret_t sos_bochs_puthex(unsigned val, int nbytes); |
||||
|
||||
/** hexdump-style pretty printing */ |
||||
sos_ret_t sos_bochs_hexdump(const void* addr, int nbytes); |
||||
|
||||
/**
|
||||
* Print the formatted string. Very restricted version of printf(3): |
||||
* 1/ can print max 255 chars, 2/ supports only %d/%i, %c, %s, %x |
||||
* without any support for flag charachters (eg %08x). |
||||
*/ |
||||
sos_ret_t sos_bochs_printf(const char *format, /* args */...) |
||||
__attribute__ ((format (printf, 1, 2))); |
||||
|
||||
#endif |
||||
@ -0,0 +1,127 @@
|
||||
/* Copyright (C) 2004 David Decotigny
|
||||
|
||||
This program is free software; you can redistribute it and/or |
||||
modify it under the terms of the GNU General Public License |
||||
as published by the Free Software Foundation; either version 2 |
||||
of the License, or (at your option) any later version. |
||||
|
||||
This program is distributed in the hope that it will be useful, |
||||
but WITHOUT ANY WARRANTY; without even the implied warranty of |
||||
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
||||
GNU General Public License for more details. |
||||
|
||||
You should have received a copy of the GNU General Public License |
||||
along with this program; if not, write to the Free Software |
||||
Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, |
||||
USA.
|
||||
*/ |
||||
#include <sos/klibc.h> |
||||
#include <hwcore/ioports.h> |
||||
|
||||
#include "x86_videomem.h" |
||||
|
||||
/* The text video memory starts at address 0xB8000. Odd bytes are the
|
||||
ASCII value of the character, even bytes are attribute for the |
||||
preceding character. */ |
||||
#define VIDEO 0xb8000 |
||||
|
||||
|
||||
/* Console screen size */ |
||||
#define LINES 25 |
||||
#define COLUMNS 80 |
||||
|
||||
|
||||
/** The structure of a character element in the video memory. @see
|
||||
http://webster.cs.ucr.edu/AoA DOS edition chapter 23 */
|
||||
typedef struct { |
||||
unsigned char character; |
||||
unsigned char attribute; |
||||
} __attribute__ ((packed)) x86_video_mem[LINES*COLUMNS]; |
||||
|
||||
|
||||
|
||||
/** The base pointer for the video memory */ |
||||
static volatile x86_video_mem *video = (volatile x86_video_mem*)VIDEO; |
||||
|
||||
sos_ret_t sos_x86_videomem_setup(void) |
||||
{ |
||||
/*
|
||||
* Hide cursor. @see Ralf Brown's interrupt (and port) list |
||||
* http://www-2.cs.cmu.edu/~ralf/files.html
|
||||
*/ |
||||
#define CRT_REG_INDEX 0x3d4 |
||||
#define CRT_REG_DATA 0x3d5 |
||||
|
||||
/* CRT index port => ask for access to register 0xa ("cursor
|
||||
start") */ |
||||
outb(0x0a, CRT_REG_INDEX); |
||||
|
||||
/* (RBIL Tables 708 & 654) CRT Register 0xa => bit 5 = cursor OFF */ |
||||
outb(1 << 5, CRT_REG_DATA); |
||||
|
||||
return SOS_OK; |
||||
} |
||||
|
||||
|
||||
sos_ret_t sos_x86_videomem_cls(unsigned char attribute) |
||||
{ |
||||
/* Clears the screen */ |
||||
int i; |
||||
for(i = 0 ; i < LINES*COLUMNS ; i++) |
||||
{ |
||||
(*video)[i].character = 0; |
||||
(*video)[i].attribute = attribute; |
||||
} |
||||
|
||||
return SOS_OK;
|
||||
} |
||||
|
||||
|
||||
sos_ret_t sos_x86_videomem_putstring(unsigned char row, unsigned char col, |
||||
unsigned char attribute, |
||||
const char *str) |
||||
{ |
||||
unsigned video_offs = row*COLUMNS + col; |
||||
|
||||
if (video_offs >= LINES*COLUMNS) |
||||
return -SOS_EINVAL; |
||||
|
||||
for ( ; str && *str && (video_offs < LINES*COLUMNS) ; str++, video_offs++) |
||||
{ |
||||
(*video)[video_offs].character = (unsigned char)*str; |
||||
(*video)[video_offs].attribute = attribute; |
||||
} |
||||
|
||||
return SOS_OK; |
||||
} |
||||
|
||||
|
||||
sos_ret_t sos_x86_videomem_putchar(unsigned char row, unsigned char col, |
||||
unsigned char attribute, |
||||
unsigned char c) |
||||
{ |
||||
unsigned video_offs = row*COLUMNS + col; |
||||
|
||||
if (video_offs >= LINES*COLUMNS) |
||||
return -SOS_EINVAL; |
||||
|
||||
(*video)[video_offs].character = c; |
||||
(*video)[video_offs].attribute = attribute; |
||||
|
||||
return SOS_OK; |
||||
} |
||||
|
||||
|
||||
sos_ret_t sos_x86_videomem_printf(unsigned char row, unsigned char col, |
||||
unsigned char attribute, |
||||
const char *format, /* args */...) |
||||
{ |
||||
char buff[256]; |
||||
va_list ap; |
||||
|
||||
va_start(ap, format); |
||||
vsnprintf(buff, sizeof(buff), format, ap); |
||||
va_end(ap); |
||||
|
||||
return sos_x86_videomem_putstring(row, col, attribute, buff); |
||||
} |
||||
@ -0,0 +1,97 @@
|
||||
/* Copyright (C) 2004 David Decotigny
|
||||
|
||||
This program is free software; you can redistribute it and/or |
||||
modify it under the terms of the GNU General Public License |
||||
as published by the Free Software Foundation; either version 2 |
||||
of the License, or (at your option) any later version. |
||||
|
||||
This program is distributed in the hope that it will be useful, |
||||
but WITHOUT ANY WARRANTY; without even the implied warranty of |
||||
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
||||
GNU General Public License for more details. |
||||
|
||||
You should have received a copy of the GNU General Public License |
||||
along with this program; if not, write to the Free Software |
||||
Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, |
||||
USA.
|
||||
*/ |
||||
#ifndef _SOS_X86_VIDEOMEM_H_ |
||||
#define _SOS_X86_VIDEOMEM_H_ |
||||
|
||||
/**
|
||||
* @file x86_videomem.h |
||||
* |
||||
* On x86 PC platforms, the text mode screen memory (and CGA/EGA/VGA |
||||
* too) is mapped into physical memory. This file handles access to |
||||
* this screen, supposed to be set in text-mode, through this memory |
||||
* area. All the functions below print the characters directly to the |
||||
* memory, without interpreting the escaped characters (such as \n, |
||||
* \r...) |
||||
*/ |
||||
|
||||
#include <sos/errno.h> |
||||
|
||||
/**
|
||||
* x86 video attributes |
||||
* See http://webster.cs.ucr.edu/AoA/DOS/ch23/CH23-1.html
|
||||
*/ |
||||
/* Normal and Dark/Light foreground */ |
||||
#define SOS_X86_VIDEO_FG_BLACK 0 |
||||
#define SOS_X86_VIDEO_FG_DKGRAY 8 |
||||
#define SOS_X86_VIDEO_FG_BLUE 1 |
||||
#define SOS_X86_VIDEO_FG_LTBLUE 9 |
||||
#define SOS_X86_VIDEO_FG_GREEN 2 |
||||
#define SOS_X86_VIDEO_FG_LTGREEN 10 |
||||
#define SOS_X86_VIDEO_FG_CYAN 3 |
||||
#define SOS_X86_VIDEO_FG_LTCYAN 11 |
||||
#define SOS_X86_VIDEO_FG_RED 4 |
||||
#define SOS_X86_VIDEO_FG_LTRED 12 |
||||
#define SOS_X86_VIDEO_FG_MAGENTA 5 |
||||
#define SOS_X86_VIDEO_FG_LTMAGENTA 13 |
||||
#define SOS_X86_VIDEO_FG_BROWN 6 |
||||
#define SOS_X86_VIDEO_FG_YELLOW 14 |
||||
#define SOS_X86_VIDEO_FG_LTGRAY 7 |
||||
#define SOS_X86_VIDEO_FG_WHITE 15 |
||||
/* Background */ |
||||
#define SOS_X86_VIDEO_BG_BLACK (0 << 4) |
||||
#define SOS_X86_VIDEO_BG_BLUE (1 << 4) |
||||
#define SOS_X86_VIDEO_BG_GREEN (2 << 4) |
||||
#define SOS_X86_VIDEO_BG_CYAN (3 << 4) |
||||
#define SOS_X86_VIDEO_BG_RED (4 << 4) |
||||
#define SOS_X86_VIDEO_BG_MAGENTA (5 << 4) |
||||
#define SOS_X86_VIDEO_BG_BROWN (6 << 4) |
||||
#define SOS_X86_VIDEO_BG_LTGRAY (7 << 4) |
||||
/* Blinking */ |
||||
#define SOS_X86_VIDEO_FG_BLINKING (1 << 7) |
||||
|
||||
|
||||
/** Setup the video RAM mapping and clear the screen */ |
||||
sos_ret_t sos_x86_videomem_setup(void); |
||||
|
||||
/** Clears the screen and set the background color as given by
|
||||
attribute */ |
||||
sos_ret_t sos_x86_videomem_cls(unsigned char attribute); |
||||
|
||||
/** Print the string on the scren with the given attribute. Does not
|
||||
handle scrolling */ |
||||
sos_ret_t sos_x86_videomem_putstring(unsigned char row, unsigned char col, |
||||
unsigned char attribute, |
||||
const char *str); |
||||
|
||||
/** Print the character on the scren with the given attribute. Does not
|
||||
handle scrolling */ |
||||
sos_ret_t sos_x86_videomem_putchar(unsigned char row, unsigned char col, |
||||
unsigned char attribute, |
||||
unsigned char c); |
||||
|
||||
/**
|
||||
* Print the formatted string. Very restricted version of printf(3): |
||||
* 1/ can print max 255 chars, 2/ supports only %d/%i, %c, %s, %x |
||||
* without any support for flag charachters (eg %08x). |
||||
*/ |
||||
sos_ret_t sos_x86_videomem_printf(unsigned char row, unsigned char col, |
||||
unsigned char attribute, |
||||
const char *format, /* args */...) |
||||
__attribute__ ((format (printf, 4, 5))); |
||||
|
||||
#endif /* _SOS_X86_VIDEOMEM_H_ */ |
||||
@ -0,0 +1,73 @@
|
||||
|
||||
Contents of the extra/ directory |
||||
================================ |
||||
|
||||
Data and configuration files to support generation of sos on non-x86 |
||||
and/or grub-less hosts: |
||||
- dot.mkvars: file to copy as .mkvars in the root directory to |
||||
compile on a non-x86 host, and to generate the grub floppy image on |
||||
a grub-less host |
||||
- grub.img.gz: compressed image of a Grub floppy (without any |
||||
kernel). Used by dot.mkvars. |
||||
- mtoolsrc: file needed by .mkvars to compile a the floppy image |
||||
|
||||
Support of a sos-specific boot sector: |
||||
- Makefile: rules to compile sos_bsect.img, the floppy image with the |
||||
boot sector and the Sos |
||||
- bootsect.S: x86 Sos boot sector (GNU as). Depends on sos_bsect.lds |
||||
- sos_bsect.lds: ld script to bind the boot sector with the remaining |
||||
of the kernel |
||||
|
||||
Misc: |
||||
- qemu-port-e9.diff: patch over qemu to support the bochs "port 0xe9 hack" |
||||
|
||||
|
||||
What you can do with these files |
||||
================================ |
||||
|
||||
|
||||
*** Compile SOS from another architecture: |
||||
------------------------------------------ |
||||
- compile a cross-compiler for the i586-gnu target. This involves |
||||
compiling the binutils and gcc. Here are example configuration |
||||
options for them: |
||||
binutils (replace sparc-cun-solaris with your arch): |
||||
../binutils-2.13/configure --prefix=/udd/ddecotig/temp_dd/xgcc/host-sparc-solaris7/stow/binutils-2.11 --host=sparc-sun-solaris2.7 i586-gnu |
||||
make && make install |
||||
gcc (ditto): |
||||
CFLAGS="-O2 -Dinhibit_libc" ../gcc-3.2/configure --target=i586-gnu --prefix=/udd/ddecotig/temp_dd/xgcc/host-sparc-solaris7/stow/gcc-3.2 --with-as=/udd/ddecotig/temp_dd/xgcc/host-sparc-solaris7/bin/as --with-ld=/udd/ddecotig/temp_dd/xgcc/host-sparc-solaris7/bin/ld --with-gnu-as --with-gnu-ld --enable-languages=c --disable-shared --disable-multilib --disable-nls --enable-threads=single |
||||
make && make install |
||||
- compile the mtools |
||||
- copy dot.mkvars to the root directory of SOS, as ".mkvars" |
||||
- customize the CC/LD/... variables to suit your cross-compiler |
||||
installatioon |
||||
- now you may run make from the SOS root directory, it should |
||||
generate the Grub boot floppy image. The following warning is |
||||
normal: |
||||
.mkvars:16: attention : écrasement des commandes pour la cible « grub-sos.img » |
||||
Makefile:92: attention : anciennes commandes ignorées pour la cible « grub-sos.img » |
||||
|
||||
|
||||
*** To compile SOS from an x86 where grub is not or incorrectly installed: |
||||
-------------------------------------------------------------------------- |
||||
- copy dot.mkvars to the root directory of SOS, as ".mkvars" |
||||
- customize the CC/LD/... variables to suit your cross-compiler |
||||
installatioon |
||||
- now you may run make from the SOS root directory, it should |
||||
generate the Grub boot floppy image. The following warning is |
||||
normal: |
||||
.mkvars:16: attention : écrasement des commandes pour la cible « grub-sos.img » |
||||
Makefile:92: attention : anciennes commandes ignorées pour la cible « grub-sos.img » |
||||
|
||||
|
||||
*** To compile SOS with its own bootloader: |
||||
------------------------------------------- |
||||
- for cross-architecture compilation: see above |
||||
- cd to this extra/ directory |
||||
- run 'make' |
||||
- the floppy image is: sos_bsect.img |
||||
NOTE : SOS will not boot correctly this way after article 2 ! |
||||
|
||||
|
||||
-- |
||||
David Decotigny |
||||
@ -0,0 +1,406 @@
|
||||
|
||||
/* |
||||
* @(#) $Id: bootsect.S,v 1.8 2004/11/20 16:00:11 d2 Exp $
|
||||
* Description : Bootsecteur en syntaxe AT&T |
||||
* Auteurs : Thomas Petazzoni & Fabrice Gautier & Emmanuel Marty |
||||
* Jerome Petazzoni & Bernard Cassagne & coffeeman |
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* David Decotigny |
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* Bug reports to kos-misc@enix.org
|
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*/ |
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|
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/* |
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* But global de ce bootsecteur : |
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* |
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* - Initialiser la becane |
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* - Charger le kernel |
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* - Passer en mode protege |
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* - Executer le kernel |
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* |
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* Taille restante : Je vous rappelle qu'un bootsecteur ne peut faire |
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* qu'au maximum 512 octets dont 2 octets obligatoires 0xAA55. Sur |
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* les 510 octets reellement utilisables, il reste 3 octets dispo (60 |
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* si on decide d'enlever le BPB un jour) !!! |
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* |
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* thomas_petazzoni : - detection des codes d'erreurs de chargement |
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* David_Decotigny : - Passage en GNU as |
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* David_Decotigny : - Chargement du noyau au-dela du 1er Mega (taille |
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* max = 0x9e000 octets = 632ko), pour avoir le |
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* meme noyau sous grub et avec le bootsecteur |
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*/ |
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|
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/* |
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* Sequence d'operations : |
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* - Le BIOS charge le bootsect en 0x7c00 (BOOT_ADRESS). On choisit |
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* la representation 0x7c0:0000 pour que le .org 0 reste valide |
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