Add the Unix stage2 attempt
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gord
parent
553fec6022
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8b2e640b8c
3 changed files with 283 additions and 0 deletions
62
grub/Makefile
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62
grub/Makefile
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#
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# GRUB program makefile
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#
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CFLAGS = -g -O2
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COMPILE = $(CC) $(CPPFLAGS) $(CFLAGS) $(SHARED_FLAGS) -I../shared_src
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LINK = $(CC) $(CFLAGS) $(LDFLAGS)
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SHARED_OBJS= common.o char_io.o boot.o cmdline.o gunzip.o \
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disk_io.o stage2.o fsys_ffs.o fsys_ext2fs.o fsys_fat.o
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all: grub
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boot.o: ../shared_src/boot.c ../shared_src/shared.h
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$(COMPILE) -c ../shared_src/boot.c
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char_io.o: ../shared_src/char_io.c ../shared_src/shared.h
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$(COMPILE) -c ../shared_src/char_io.c
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cmdline.o: ../shared_src/cmdline.c ../shared_src/shared.h
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$(COMPILE) -c ../shared_src/cmdline.c
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common.o: ../shared_src/common.c ../shared_src/shared.h
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$(COMPILE) -c ../shared_src/common.c
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gunzip.o: ../shared_src/gunzip.c ../shared_src/shared.h
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$(COMPILE) -c ../shared_src/gunzip.c
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disk_io.o: ../shared_src/disk_io.c ../shared_src/filesys.h \
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../shared_src/pc_slice.h ../shared_src/shared.h
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$(COMPILE) -c ../shared_src/disk_io.c
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stage2.o: ../shared_src/stage2.c ../shared_src/shared.h
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$(COMPILE) -c ../shared_src/stage2.c
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fsys_ffs.o: ../shared_src/fsys_ffs.c ../shared_src/filesys.h \
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../shared_src/pc_slice.h ../shared_src/shared.h \
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../shared_src/defs.h ../shared_src/disk_inode.h \
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../shared_src/disk_inode_ffs.h ../shared_src/dir.h \
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../shared_src/fs.h
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$(COMPILE) -c ../shared_src/fsys_ffs.c
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fsys_ext2fs.o: ../shared_src/fsys_ext2fs.c ../shared_src/filesys.h \
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../shared_src/pc_slice.h ../shared_src/shared.h
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$(COMPILE) -c ../shared_src/fsys_ext2fs.c
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fsys_fat.o: ../shared_src/fsys_fat.c ../shared_src/filesys.h \
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../shared_src/pc_slice.h ../shared_src/shared.h \
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../shared_src/fat.h
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$(COMPILE) -c ../shared_src/fsys_fat.c
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main.o: main.c ../shared_src/shared.h
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$(COMPILE) -c main.c
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asmstub.o: asmstub.c ../shared_src/shared.h
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$(COMPILE) -c asmstub.c
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grub: main.o asmstub.o $(SHARED_OBJS)
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$(LINK) -o $@ main.o asmstub.o $(SHARED_OBJS)
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clean:
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rm -f *.o grub
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192
grub/asmstub.c
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192
grub/asmstub.c
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/* asmstub.c - a version of shared_src/asm.S that works under Unix */
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/*
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* GRUB -- GRand Unified Bootloader
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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 modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (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., 675 Mass Ave, Cambridge, MA 02139, USA.
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*/
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#define end _end
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#include "shared.h"
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#undef end
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char *end = _end;
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unsigned long install_partition = 0x20000;
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unsigned long boot_drive = 0;
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char version_string[] = "0.5";
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char config_file[] = "/boot/grub/menu.lst";
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/* The main entry point into this mess. */
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void
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start_stage2 (void)
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{
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init_bios_info ();
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}
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/* calls for direct boot-loader chaining */
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void
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chain_stage1(int segment, int offset, int part_table_addr)
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{
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}
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void
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chain_stage2(int segment, int offset)
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{
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}
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/* do some funky stuff, then boot linux */
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void
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linux_boot(void)
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{
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}
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/* For bzImage kernels. */
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void
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big_linux_boot(void)
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{
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}
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/* booting a multiboot executable */
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void
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multi_boot(int start, int mbi)
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{
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}
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/* sets it to linear or wired A20 operation */
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void
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gateA20 (int linear)
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{
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/* Nothing to do in the simulator. */
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}
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/* memory probe routines */
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int
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get_memsize (int type)
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{
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if (! type)
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return 640 * 1024; /* 640kB conventional */
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else
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return 4 * 1024 * 1024; /* 4MB extended */
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}
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int
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get_eisamemsize (void)
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{
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}
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int
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get_mmap_entry (int buf, int cont)
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{
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}
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/* Address and old continuation value for the Query System Address Map
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BIOS call. */
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int
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get_mem_map (int addr, int cont)
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{
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return 0;
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}
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/* low-level timing info */
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int
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getrtsecs (void)
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{
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return 0xff;
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}
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/* low-level character I/O */
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void
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cls(void)
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{
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}
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/* returns packed values, LSB+1 is x, LSB is y */
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int
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getxy(void)
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{
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}
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void
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gotoxy(int x, int y)
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{
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}
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/* displays an ASCII character. IBM displays will translate some
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characters to special graphical ones */
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void
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putchar(int c)
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{
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}
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/* returns packed BIOS/ASCII code */
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int
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asm_getkey(void)
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{
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}
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/* like 'getkey', but doesn't wait, returns -1 if nothing available */
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int
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checkkey(void)
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{
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}
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/* sets text mode character attribute at the cursor position */
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void
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set_attrib(int attr)
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{
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}
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/* low-level disk I/O */
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int
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get_diskinfo(int drive)
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{
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}
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int
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biosdisk(int subfunc, int drive, int geometry,
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int sector, int nsec, int segment)
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{
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}
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void
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stop_floppy(void)
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{
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}
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29
grub/main.c
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29
grub/main.c
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@ -0,0 +1,29 @@
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/* main.c - experimental GRUB stage2 that runs under Unix */
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/*
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* GRUB -- GRand Unified Bootloader
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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 modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (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., 675 Mass Ave, Cambridge, MA 02139, USA.
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*/
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extern void start_stage2 (void);
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int
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main (int argc, char **argv)
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{
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/* Call the main entry point. */
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start_stage2 ();
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exit (0);
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}
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