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freebsd-nq/sys/i386/boot/dosboot/fbsdboot.mak
Poul-Henning Kamp b8e4cd2bb3 This is a MS-DOS program, but is does something useful for us: 
It boots FreeBSD from a running MS-DOS system.

It's compiled using some MS-DOS tools, but there is a binary
hidden in the uuencoded file.  (Go ahead, flame me if you can come up
with a solution for the problem.  Just saying "this is bad" doesn't count!)

Rod, you were right: one would have to deal with weird interfaces to the
memory managers, and it seems that Christian found them all, and made them
work.

Thanks Christian!

Reviewed by:	phk
Submitted by:	DI. Christian Gusenbauer <cg@fimp01.fim.uni-linz.ac.at>

Christians README:
------------------

Hi Everybody!

This is version 1.5 of "fbsdboot", a program that allows you to boot a kernel
from a MS-DOS partition or a FreeBSD partition. This program runs using DOS.
It works with various memory managers (like  EMM386, 386MAX) under certain
circumstances.

First, a FreeBSD kernel is always loaded to memory starting at 0x100000. To
assure that loading the kernel *does not* overwrite memory used by memory
managers, high memory for the kernel is allocated and after loading the kernel
it's moved to 0x100000.

Second, there are many ways to switch to protected mode which is necessary to
start the kernel. Each BIOS gives you the possibility to use INT15H (AH=89H)
to do that. But some memory-managers like 386max does not allow you to use
this method.

An other way to do the switch is to use DPMI services, but they do not
guarantee, that the protected mode application is executed with privilege
level 0. Therefore this method is *not* used.

VCPI services offer another way to switch to protected mode, and VCPI servers
are built into "emm386.exe", "386max" and "qemm". That's why, this method is
implemented in fbsdboot.exe.

Fbsdboot.exe tries to switch to protected mode using VCPI services. If they're
not available INT15H is used to do the switch. If that fails, it's not possible
for this version of fbsdboot.exe to boot a kernel :-(.

You can get commandline options of fbsdboot if you start it with "-?" as option!

I don't know, if fbsdboot works with QEMM, as I don't have the possibility to
test it.

Enjoy and have fun!

Christian.
cg@fimp01.fim.uni-linz.ac.at


PS: Many thanks to Bruce Evans for his assistance!
1995-02-15 04:45:50 +00:00

178 lines
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Makefile
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# Microsoft Visual C++ generated build script - Do not modify
PROJ = FBSDBOOT
DEBUG = 0
PROGTYPE = 6
CALLER =
ARGS =
DLLS =
D_RCDEFINES = -d_DEBUG
R_RCDEFINES = -dNDEBUG
ORIGIN = MSVC
ORIGIN_VER = 1.00
PROJPATH = C:\SRC\FBSDBOOT\
USEMFC = 0
CC = cl
CPP = cl
CXX = cl
CCREATEPCHFLAG =
CPPCREATEPCHFLAG =
CUSEPCHFLAG =
CPPUSEPCHFLAG =
FIRSTC = FBSDBOOT.C
FIRSTCPP =
RC = rc
CFLAGS_D_DEXE = /nologo /Gs /G3 /Zp1 /W3 /Zi /AL /Oi /D "_DEBUG" /D "i386" /D "_DOS" /D "__i386__" /D "DO_BAD144" /Fc /Fd"FBSDBOOT.PDB"
CFLAGS_R_DEXE = /nologo /Gs /G3 /Zp1 /W3 /AL /Ox /D "NDEBUG" /D "i386" /D "_DOS" /D "__i386__" /D "DO_BAD144"
LFLAGS_D_DEXE = /NOLOGO /NOI /STACK:6000 /ONERROR:NOEXE /CO /MAP /LINE
LFLAGS_R_DEXE = /NOLOGO /NOI /STACK:5120 /ONERROR:NOEXE
LIBS_D_DEXE = oldnames llibce
LIBS_R_DEXE = oldnames llibce
RCFLAGS = /nologo
RESFLAGS = /nologo
RUNFLAGS =
OBJS_EXT =
LIBS_EXT =
!if "$(DEBUG)" == "1"
CFLAGS = $(CFLAGS_D_DEXE)
LFLAGS = $(LFLAGS_D_DEXE)
LIBS = $(LIBS_D_DEXE)
MAPFILE = nul
RCDEFINES = $(D_RCDEFINES)
!else
CFLAGS = $(CFLAGS_R_DEXE)
LFLAGS = $(LFLAGS_R_DEXE)
LIBS = $(LIBS_R_DEXE)
MAPFILE = nul
RCDEFINES = $(R_RCDEFINES)
!endif
!if [if exist MSVC.BND del MSVC.BND]
!endif
SBRS = FBSDBOOT.SBR \
PROTMOD.SBR \
BOOT.SBR \
DISK.SBR \
SYS.SBR \
DOSBOOT.SBR
FBSDBOOT_DEP = c:\src\fbsdboot\reboot.h \
c:\src\fbsdboot\boot.h \
c:\src\fbsdboot\param.h \
c:\src\fbsdboot\syslimit.h \
c:\src\fbsdboot\quota.h \
c:\src\fbsdboot\cdefs.h \
c:\src\fbsdboot\fs.h \
c:\src\fbsdboot\inode.h \
c:\src\fbsdboot\dinode.h \
c:\src\fbsdboot\dosboot.h
PROTMOD_DEP = c:\src\fbsdboot\boot.h \
c:\src\fbsdboot\param.h \
c:\src\fbsdboot\syslimit.h \
c:\src\fbsdboot\quota.h \
c:\src\fbsdboot\cdefs.h \
c:\src\fbsdboot\fs.h \
c:\src\fbsdboot\inode.h \
c:\src\fbsdboot\dinode.h \
c:\src\fbsdboot\protmod.h
BOOT_DEP = c:\src\fbsdboot\protmod.h \
c:\src\fbsdboot\param.h \
c:\src\fbsdboot\syslimit.h \
c:\src\fbsdboot\boot.h \
c:\src\fbsdboot\quota.h \
c:\src\fbsdboot\cdefs.h \
c:\src\fbsdboot\fs.h \
c:\src\fbsdboot\inode.h \
c:\src\fbsdboot\dinode.h \
c:\src\fbsdboot\reboot.h \
c:\src\fbsdboot\exec.h
DISK_DEP = c:\src\fbsdboot\boot.h \
c:\src\fbsdboot\param.h \
c:\src\fbsdboot\syslimit.h \
c:\src\fbsdboot\quota.h \
c:\src\fbsdboot\cdefs.h \
c:\src\fbsdboot\fs.h \
c:\src\fbsdboot\inode.h \
c:\src\fbsdboot\dinode.h \
c:\src\fbsdboot\disklabe.h
SYS_DEP = c:\src\fbsdboot\protmod.h \
c:\src\fbsdboot\boot.h \
c:\src\fbsdboot\param.h \
c:\src\fbsdboot\syslimit.h \
c:\src\fbsdboot\quota.h \
c:\src\fbsdboot\cdefs.h \
c:\src\fbsdboot\fs.h \
c:\src\fbsdboot\inode.h \
c:\src\fbsdboot\dinode.h \
c:\src\fbsdboot\dir.h \
c:\src\fbsdboot\dirent.h
DOSBOOT_DEP = c:\src\fbsdboot\protmod.h \
c:\src\fbsdboot\param.h \
c:\src\fbsdboot\syslimit.h \
c:\src\fbsdboot\boot.h \
c:\src\fbsdboot\quota.h \
c:\src\fbsdboot\cdefs.h \
c:\src\fbsdboot\fs.h \
c:\src\fbsdboot\inode.h \
c:\src\fbsdboot\dinode.h \
c:\src\fbsdboot\reboot.h \
c:\src\fbsdboot\exec.h
all: $(PROJ).EXE
FBSDBOOT.OBJ: FBSDBOOT.C $(FBSDBOOT_DEP)
$(CC) $(CFLAGS) $(CCREATEPCHFLAG) /c FBSDBOOT.C
PROTMOD.OBJ: PROTMOD.C $(PROTMOD_DEP)
$(CC) $(CFLAGS) $(CUSEPCHFLAG) /c PROTMOD.C
BOOT.OBJ: BOOT.C $(BOOT_DEP)
$(CC) $(CFLAGS) $(CUSEPCHFLAG) /c BOOT.C
DISK.OBJ: DISK.C $(DISK_DEP)
$(CC) $(CFLAGS) $(CUSEPCHFLAG) /c DISK.C
SYS.OBJ: SYS.C $(SYS_DEP)
$(CC) $(CFLAGS) $(CUSEPCHFLAG) /c SYS.C
DOSBOOT.OBJ: DOSBOOT.C $(DOSBOOT_DEP)
$(CC) $(CFLAGS) $(CUSEPCHFLAG) /c DOSBOOT.C
$(PROJ).EXE:: FBSDBOOT.OBJ PROTMOD.OBJ BOOT.OBJ DISK.OBJ SYS.OBJ DOSBOOT.OBJ $(OBJS_EXT) $(DEFFILE)
echo >NUL @<<$(PROJ).CRF
FBSDBOOT.OBJ +
PROTMOD.OBJ +
BOOT.OBJ +
DISK.OBJ +
SYS.OBJ +
DOSBOOT.OBJ +
$(OBJS_EXT)
$(PROJ).EXE
$(MAPFILE)
c:\msvc\lib\+
c:\msvc\mfc\lib\+
$(LIBS)
$(DEFFILE);
<<
link $(LFLAGS) @$(PROJ).CRF
run: $(PROJ).EXE
$(PROJ) $(RUNFLAGS)
$(PROJ).BSC: $(SBRS)
bscmake @<<
/o$@ $(SBRS)
<<
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