2003-11-16 Jeroen Dekkers <jeroen@dekkers.cx>
* conf/i386-pc.rmk (pkgdata_MODULES): Add _multiboot.mod. (_multiboot_mod_SOURCES): New variable. (_multiboot_mod_CFLAGS): Likewise. * loader/i386/pc/multiboot.c: New file. * include/pupa/i386/pc/multiboot.h: Likewise. * kern/i386/pc/startup.S: Include pupa/machine/multiboot.h. (pupa_multiboot_real_boot): New function. * include/pupa/i386/pc/loader.h: Include pupa/machine/multiboot.h. (pupa_multiboot_real_boot): New prototype. (pupa_rescue_cmd_multiboot): Likewise (pupa_rescue_cmd_module): Likewise. * kern/loader.c (pupa_loader_set): Continue when pupa_loader_unload_func() fails. (pupa_loader_unset): New function. * include/pupa/loader.h (pupa_loader_unset): New prototype. * kern/misc.c (pupa_stpcpy): New function. * include/pupa/misc.h (pupa_stpcpy): New prototype.
This commit is contained in:
jeroen
parent
8e72a9c0e3
commit
9a5c1adeaa
11 changed files with 672 additions and 4 deletions
22
ChangeLog
22
ChangeLog
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@ -1,3 +1,25 @@
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2003-11-16 Jeroen Dekkers <jeroen@dekkers.cx>
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* conf/i386-pc.rmk (pkgdata_MODULES): Add _multiboot.mod.
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(_multiboot_mod_SOURCES): New variable.
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(_multiboot_mod_CFLAGS): Likewise.
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* loader/i386/pc/multiboot.c: New file.
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* include/pupa/i386/pc/multiboot.h: Likewise.
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* kern/i386/pc/startup.S: Include pupa/machine/multiboot.h.
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(pupa_multiboot_real_boot): New function.
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* include/pupa/i386/pc/loader.h: Include pupa/machine/multiboot.h.
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(pupa_multiboot_real_boot): New prototype.
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(pupa_rescue_cmd_multiboot): Likewise
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(pupa_rescue_cmd_module): Likewise.
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* kern/loader.c (pupa_loader_set): Continue when
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pupa_loader_unload_func() fails.
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(pupa_loader_unset): New function.
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* include/pupa/loader.h (pupa_loader_unset): New prototype.
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* kern/misc.c (pupa_stpcpy): New function.
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* include/pupa/misc.h (pupa_stpcpy): New prototype.
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2003-11-12 Marco Gerards <metgerards@student.han.nl>
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* disk/i386/pc/biosdisk.c (pupa_biosdisk_open): Correctly check
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@ -403,7 +403,7 @@ genmoddep-util_genmoddep.d: util/genmoddep.c
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# Modules.
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pkgdata_MODULES = _chain.mod _linux.mod fat.mod ext2.mod normal.mod hello.mod \
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vga.mod font.mod
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vga.mod font.mod _multiboot.mod
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# For _chain.mod.
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_chain_mod_SOURCES = loader/i386/pc/chainloader.c
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@ -750,6 +750,45 @@ font_mod-font_manager.d: font/manager.c
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-include font_mod-font_manager.d
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font_mod_CFLAGS = $(COMMON_CFLAGS)
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# For _multiboot.mod.
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_multiboot_mod_SOURCES = loader/i386/pc/multiboot.c
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CLEANFILES += _multiboot.mod mod-_multiboot.o mod-_multiboot.c pre-_multiboot.o _multiboot_mod-loader_i386_pc_multiboot.o def-_multiboot.lst und-_multiboot.lst
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MOSTLYCLEANFILES += _multiboot_mod-loader_i386_pc_multiboot.d
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DEFSYMFILES += def-_multiboot.lst
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UNDSYMFILES += und-_multiboot.lst
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_multiboot.mod: pre-_multiboot.o mod-_multiboot.o
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-rm -f $@
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$(LD) -r -o $@ $^
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$(STRIP) --strip-unneeded -K pupa_mod_init -K pupa_mod_fini -R .note -R .comment $@
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pre-_multiboot.o: _multiboot_mod-loader_i386_pc_multiboot.o
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-rm -f $@
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$(LD) -r -o $@ $^
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mod-_multiboot.o: mod-_multiboot.c
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$(CC) $(CPPFLAGS) $(CFLAGS) $(_multiboot_mod_CFLAGS) -c -o $@ $<
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mod-_multiboot.c: moddep.lst genmodsrc.sh
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sh $(srcdir)/genmodsrc.sh '_multiboot' $< > $@ || (rm -f $@; exit 1)
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def-_multiboot.lst: pre-_multiboot.o
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$(NM) -g --defined-only -P -p $< | sed 's/^\([^ ]*\).*/\1 _multiboot/' > $@
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und-_multiboot.lst: pre-_multiboot.o
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echo '_multiboot' > $@
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$(NM) -u -P -p $< | cut -f1 -d' ' >> $@
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_multiboot_mod-loader_i386_pc_multiboot.o: loader/i386/pc/multiboot.c
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$(CC) -Iloader/i386/pc -I$(srcdir)/loader/i386/pc $(CPPFLAGS) $(CFLAGS) $(_multiboot_mod_CFLAGS) -c -o $@ $<
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_multiboot_mod-loader_i386_pc_multiboot.d: loader/i386/pc/multiboot.c
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set -e; $(CC) -Iloader/i386/pc -I$(srcdir)/loader/i386/pc $(CPPFLAGS) $(CFLAGS) $(_multiboot_mod_CFLAGS) -M $< | sed 's,multiboot\.o[ :]*,_multiboot_mod-loader_i386_pc_multiboot.o $@ : ,g' > $@; [ -s $@ ] || rm -f $@
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-include _multiboot_mod-loader_i386_pc_multiboot.d
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_multiboot_mod_CFLAGS = $(COMMON_CFLAGS)
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CLEANFILES += moddep.lst
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pkgdata_DATA += moddep.lst
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moddep.lst: $(DEFSYMFILES) $(UNDSYMFILES) genmoddep
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@ -62,7 +62,7 @@ genmoddep_SOURCES = util/genmoddep.c
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# Modules.
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pkgdata_MODULES = _chain.mod _linux.mod fat.mod ext2.mod normal.mod hello.mod \
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vga.mod font.mod
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vga.mod font.mod _multiboot.mod
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# For _chain.mod.
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_chain_mod_SOURCES = loader/i386/pc/chainloader.c
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@ -97,3 +97,7 @@ vga_mod_CFLAGS = $(COMMON_CFLAGS)
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# For font.mod.
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font_mod_SOURCES = font/manager.c
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font_mod_CFLAGS = $(COMMON_CFLAGS)
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# For _multiboot.mod.
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_multiboot_mod_SOURCES = loader/i386/pc/multiboot.c
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_multiboot_mod_CFLAGS = $(COMMON_CFLAGS)
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@ -1,6 +1,7 @@
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/*
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* PUPA -- Preliminary Universal Programming Architecture for GRUB
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* Copyright (C) 2002 Yoshinori K. Okuji <okuji@enbug.org>
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* Copyright (C) 2003 Jeroen Dekkers <jeroen@dekkers.cx>
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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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@ -22,6 +23,7 @@
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#include <pupa/types.h>
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#include <pupa/symbol.h>
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#include <pupa/machine/multiboot.h>
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extern pupa_uint32_t EXPORT_VAR(pupa_linux_prot_size);
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extern char *EXPORT_VAR(pupa_linux_tmp_addr);
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@ -33,10 +35,17 @@ void EXPORT_FUNC(pupa_linux_boot_bzimage) (void) __attribute__ ((noreturn));
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/* This is an asm part of the chainloader. */
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void EXPORT_FUNC(pupa_chainloader_real_boot) (int drive, void *part_addr) __attribute__ ((noreturn));
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/* The asm part of the multiboot loader. */
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void EXPORT_FUNC(pupa_multiboot_real_boot) (pupa_addr_t entry,
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struct pupa_multiboot_info *mbi)
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__attribute__ ((noreturn));
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/* It is necessary to export these functions, because normal mode commands
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reuse rescue mode commands. */
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void pupa_rescue_cmd_chainloader (int argc, char *argv[]);
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void pupa_rescue_cmd_linux (int argc, char *argv[]);
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void pupa_rescue_cmd_initrd (int argc, char *argv[]);
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void pupa_rescue_cmd_multiboot (int argc, char *argv[]);
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void pupa_rescue_cmd_module (int argc, char *argv[]);
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#endif /* ! PUPA_LOADER_MACHINE_HEADER */
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184
include/grub/i386/pc/multiboot.h
Normal file
184
include/grub/i386/pc/multiboot.h
Normal file
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@ -0,0 +1,184 @@
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/* multiboot.h - multiboot header file. */
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/*
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* PUPA -- Preliminary Universal Programming Architecture for GRUB
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* Copyright (C) 2003 Jeroen Dekkers <jeroen@dekkers.cx>
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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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#ifndef PUPA_MULTIBOOT_MACHINE_HEADER
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#define PUPA_MULTIBOOT_MACHINE_HEADER 1
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/* How many bytes from the start of the file we search for the header. */
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#define PUPA_MB_SEARCH 8192
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/* The magic field should contain this. */
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#define PUPA_MB_MAGIC 0x1BADB002
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/* This should be in %eax. */
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#define PUPA_MB_MAGIC2 0x2BADB002
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/* The bits in the required part of flags field we don't support. */
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#define PUPA_MB_UNSUPPORTED 0x0000fffc
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/* Alignment of multiboot modules. */
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#define PUPA_MB_MOD_ALIGN 0x00001000
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/*
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* Flags set in the 'flags' member of the multiboot header.
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*/
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/* Align all boot modules on i386 page (4KB) boundaries. */
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#define PUPA_MB_PAGE_ALIGN 0x00000001
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/* Must pass memory information to OS. */
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#define PUPA_MB_MEMORY_INFO 0x00000002
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/* Must pass video information to OS. */
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#define PUPA_MB_VIDEO_MODE 0x00000004
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/* This flag indicates the use of the address fields in the header. */
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#define PUPA_MB_AOUT_KLUDGE 0x00010000
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/*
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* Flags to be set in the 'flags' member of the multiboot info structure.
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*/
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/* is there basic lower/upper memory information? */
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#define PUPA_MB_INFO_MEMORY 0x00000001
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/* is there a boot device set? */
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#define PUPA_MB_INFO_BOOTDEV 0x00000002
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/* is the command-line defined? */
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#define PUPA_MB_INFO_CMDLINE 0x00000004
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/* are there modules to do something with? */
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#define PUPA_MB_INFO_MODS 0x00000008
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/* These next two are mutually exclusive */
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/* is there a symbol table loaded? */
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#define PUPA_MB_INFO_AOUT_SYMS 0x00000010
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/* is there an ELF section header table? */
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#define PUPA_MB_INFO_ELF_SHDR 0x00000020
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/* is there a full memory map? */
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#define PUPA_MB_INFO_MEM_MAP 0x00000040
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/* Is there drive info? */
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#define PUPA_MB_INFO_DRIVE_INFO 0x00000080
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/* Is there a config table? */
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#define PUPA_MB_INFO_CONFIG_TABLE 0x00000100
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/* Is there a boot loader name? */
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#define PUPA_MB_INFO_BOOT_LOADER_NAME 0x00000200
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/* Is there a APM table? */
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#define PUPA_MB_INFO_APM_TABLE 0x00000400
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/* Is there video information? */
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#define PUPA_MB_INFO_VIDEO_INFO 0x00000800
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#ifndef ASM_FILE
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#include <pupa/types.h>
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struct pupa_multiboot_header
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{
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/* Must be PUPA_MB_MAGIC - see above. */
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pupa_uint32_t magic;
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/* Feature flags. */
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pupa_uint32_t flags;
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/* The above fields plus this one must equal 0 mod 2^32. */
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pupa_uint32_t checksum;
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/* These are only valid if PUPA_MB_AOUT_KLUDGE is set. */
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pupa_uint32_t header_addr;
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pupa_uint32_t load_addr;
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pupa_uint32_t load_end_addr;
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pupa_uint32_t bss_end_addr;
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pupa_uint32_t entry_addr;
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/* These are only valid if PUPA_MB_VIDEO_MODE is set. */
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pupa_uint32_t mode_type;
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pupa_uint32_t width;
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pupa_uint32_t height;
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pupa_uint32_t depth;
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};
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struct pupa_multiboot_info
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{
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/* MultiBoot info version number */
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pupa_uint32_t flags;
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/* Available memory from BIOS */
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pupa_uint32_t mem_lower;
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pupa_uint32_t mem_upper;
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/* "root" partition */
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pupa_uint32_t boot_device;
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/* Kernel command line */
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pupa_uint32_t cmdline;
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/* Boot-Module list */
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pupa_uint32_t mods_count;
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pupa_uint32_t mods_addr;
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pupa_uint32_t syms[4];
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/* Memory Mapping buffer */
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pupa_uint32_t mmap_length;
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pupa_uint32_t mmap_addr;
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/* Drive Info buffer */
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pupa_uint32_t drives_length;
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pupa_uint32_t drives_addr;
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/* ROM configuration table */
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pupa_uint32_t config_table;
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/* Boot Loader Name */
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pupa_uint32_t boot_loader_name;
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/* APM table */
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pupa_uint32_t apm_table;
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/* Video */
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pupa_uint32_t vbe_control_info;
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pupa_uint32_t vbe_mode_info;
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pupa_uint16_t vbe_mode;
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pupa_uint16_t vbe_interface_seg;
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pupa_uint16_t vbe_interface_off;
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pupa_uint16_t vbe_interface_len;
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};
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struct pupa_mod_list
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{
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/* the memory used goes from bytes 'mod_start' to 'mod_end-1' inclusive */
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pupa_uint32_t mod_start;
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pupa_uint32_t mod_end;
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/* Module command line */
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pupa_uint32_t cmdline;
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/* padding to take it to 16 bytes (must be zero) */
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pupa_uint32_t pad;
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};
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#endif /* ! ASM_FILE */
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#endif /* ! PUPA_MULTIBOOT_MACHINE_HEADER */
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@ -2,6 +2,7 @@
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/*
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* PUPA -- Preliminary Universal Programming Architecture for GRUB
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* Copyright (C) 2002 Yoshinori K. Okuji <okuji@enbug.org>
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* Copyright (C) 2003 Jeroen Dekkers <jeroen@dekkers.cx>
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*
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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
|
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@ -31,6 +32,7 @@ extern pupa_size_t EXPORT_VAR(pupa_os_area_size);
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void EXPORT_FUNC(pupa_loader_set) (pupa_err_t (*boot) (void),
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pupa_err_t (*unload) (void));
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void EXPORT_FUNC(pupa_loader_unset) (void);
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pupa_err_t EXPORT_FUNC(pupa_loader_boot) (void);
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@ -32,6 +32,7 @@
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void *EXPORT_FUNC(pupa_memmove) (void *dest, const void *src, pupa_size_t n);
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char *EXPORT_FUNC(pupa_strcpy) (char *dest, const char *src);
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char *EXPORT_FUNC(pupa_strncpy) (char *dest, const char *src, int c);
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char *EXPORT_FUNC(pupa_stpcpy) (char *dest, const char *src);
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char *EXPORT_FUNC(pupa_strcat) (char *dest, const char *src);
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|
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@ -3,6 +3,7 @@
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* Copyright (C) 1999,2000,2001,2002 Free Software Foundation, Inc.
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* Copyright (C) 2002,2003 Yoshinori K. Okuji <okuji@enbug.org>
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* Copyright (C) 2003 Marco Gerards <metgerards@student.han.nl>
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* Copyright (C) 2003 Jeroen Dekkers <jeroen@dekkers.cx>
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*
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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
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@ -52,6 +53,7 @@
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#include <pupa/machine/console.h>
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#include <pupa/machine/linux.h>
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#include <pupa/machine/kernel.h>
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#include <pupa/machine/multiboot.h>
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#define ABS(x) ((x) - EXT_C(start) + PUPA_BOOT_MACHINE_KERNEL_ADDR + 0x200)
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@ -621,6 +623,29 @@ linux_setup_seg:
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.code32
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/*
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* This starts the multiboot kernel.
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*/
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FUNCTION(pupa_multiboot_real_boot)
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/* Push the entry address on the stack. */
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pushl %eax
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/* Move the address of the multiboot information structure to ebx. */
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movl %edx,%ebx
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/* Unload all modules and stop the floppy driver. */
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call EXT_C(pupa_dl_unload_all)
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call EXT_C(pupa_stop_floppy)
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/* Interrupts should be disabled. */
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cli
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/* Move the magic value into eax and jump to the kernel. */
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movl $PUPA_MB_MAGIC2,%eax
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popl %ecx
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jmp *%ecx
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/*
|
||||
* int pupa_biosdisk_rw_int13_extensions (int ah, int drive, void *dap)
|
||||
*
|
||||
|
|
|
|||
|
|
@ -1,6 +1,7 @@
|
|||
/*
|
||||
* PUPA -- Preliminary Universal Programming Architecture for GRUB
|
||||
* Copyright (C) 2002 Yoshinori K. Okuji <okuji@enbug.org>
|
||||
* Copyright (C) 2003 Jeroen Dekkers <jeroen@dekkers.cx>
|
||||
*
|
||||
* PUPA is free software; you can redistribute it and/or modify
|
||||
* it under the terms of the GNU General Public License as published by
|
||||
|
|
@ -32,8 +33,7 @@ pupa_loader_set (pupa_err_t (*boot) (void),
|
|||
pupa_err_t (*unload) (void))
|
||||
{
|
||||
if (pupa_loader_loaded && pupa_loader_unload_func)
|
||||
if (pupa_loader_unload_func () != PUPA_ERR_NONE)
|
||||
return;
|
||||
pupa_loader_unload_func ();
|
||||
|
||||
pupa_loader_boot_func = boot;
|
||||
pupa_loader_unload_func = unload;
|
||||
|
|
@ -41,6 +41,18 @@ pupa_loader_set (pupa_err_t (*boot) (void),
|
|||
pupa_loader_loaded = 1;
|
||||
}
|
||||
|
||||
void
|
||||
pupa_loader_unset(void)
|
||||
{
|
||||
if (pupa_loader_loaded && pupa_loader_unload_func)
|
||||
pupa_loader_unload_func ();
|
||||
|
||||
pupa_loader_boot_func = 0;
|
||||
pupa_loader_unload_func = 0;
|
||||
|
||||
pupa_loader_loaded = 0;
|
||||
}
|
||||
|
||||
pupa_err_t
|
||||
pupa_loader_boot (void)
|
||||
{
|
||||
|
|
|
|||
13
kern/misc.c
13
kern/misc.c
|
|
@ -70,6 +70,19 @@ pupa_strncpy (char *dest, const char *src, int c)
|
|||
return dest;
|
||||
}
|
||||
|
||||
char *
|
||||
pupa_stpcpy (char *dest, const char *src)
|
||||
{
|
||||
char *d = dest;
|
||||
const char *s = src;
|
||||
|
||||
do
|
||||
*d++ = *s;
|
||||
while (*s++ != '\0');
|
||||
|
||||
return d - 1;
|
||||
}
|
||||
|
||||
char *
|
||||
pupa_strcat (char *dest, const char *src)
|
||||
{
|
||||
|
|
|
|||
357
loader/i386/pc/multiboot.c
Normal file
357
loader/i386/pc/multiboot.c
Normal file
|
|
@ -0,0 +1,357 @@
|
|||
/* multiboot.c - boot a multiboot OS image. */
|
||||
/*
|
||||
* PUPA -- Preliminary Universal Programming Architecture for GRUB
|
||||
* Copyright (C) 2003 Jeroen Dekkers <jeroen@dekkers.cx>
|
||||
*
|
||||
* 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.
|
||||
*/
|
||||
|
||||
/*
|
||||
* FIXME: The following features from the Multiboot specification still
|
||||
* need to be implemented:
|
||||
* - VBE support
|
||||
* - a.out support
|
||||
* - boot device
|
||||
* - symbol table
|
||||
* - memory map
|
||||
* - drives table
|
||||
* - ROM configuration table
|
||||
* - APM table
|
||||
*/
|
||||
|
||||
#include <pupa/loader.h>
|
||||
#include <pupa/machine/loader.h>
|
||||
#include <pupa/machine/multiboot.h>
|
||||
#include <pupa/machine/init.h>
|
||||
#include <pupa/elf.h>
|
||||
#include <pupa/file.h>
|
||||
#include <pupa/err.h>
|
||||
#include <pupa/rescue.h>
|
||||
#include <pupa/dl.h>
|
||||
#include <pupa/mm.h>
|
||||
#include <pupa/misc.h>
|
||||
|
||||
static pupa_dl_t my_mod;
|
||||
static struct pupa_multiboot_info *mbi;
|
||||
static pupa_addr_t entry;
|
||||
|
||||
static pupa_err_t
|
||||
pupa_multiboot_boot (void)
|
||||
{
|
||||
pupa_multiboot_real_boot (entry, mbi);
|
||||
|
||||
/* Not reached. */
|
||||
return PUPA_ERR_NONE;
|
||||
}
|
||||
|
||||
static pupa_err_t
|
||||
pupa_multiboot_unload (void)
|
||||
{
|
||||
if (mbi)
|
||||
{
|
||||
int i;
|
||||
for (i = 0; i < mbi->mods_count; i++)
|
||||
{
|
||||
pupa_free ((void *)
|
||||
((struct pupa_mod_list *) mbi->mods_addr)[i].mod_start);
|
||||
pupa_free ((void *)
|
||||
((struct pupa_mod_list *) mbi->mods_addr)[i].cmdline);
|
||||
}
|
||||
pupa_free ((void *) mbi->mods_addr);
|
||||
pupa_free ((void *) mbi->cmdline);
|
||||
pupa_free (mbi);
|
||||
}
|
||||
|
||||
|
||||
mbi = 0;
|
||||
pupa_dl_unref (my_mod);
|
||||
|
||||
return PUPA_ERR_NONE;
|
||||
}
|
||||
|
||||
void
|
||||
pupa_rescue_cmd_multiboot (int argc, char *argv[])
|
||||
{
|
||||
pupa_file_t file = 0;
|
||||
char buffer[PUPA_MB_SEARCH], *cmdline = 0, *p;
|
||||
struct pupa_multiboot_header *header;
|
||||
pupa_ssize_t len;
|
||||
int i;
|
||||
Elf32_Ehdr *ehdr;
|
||||
|
||||
pupa_dl_ref (my_mod);
|
||||
|
||||
pupa_loader_unset();
|
||||
|
||||
if (argc == 0)
|
||||
{
|
||||
pupa_error (PUPA_ERR_BAD_ARGUMENT, "No kernel specified");
|
||||
goto fail;
|
||||
}
|
||||
|
||||
file = pupa_file_open (argv[0]);
|
||||
if (!file)
|
||||
{
|
||||
pupa_error (PUPA_ERR_BAD_ARGUMENT, "Couldn't open file");
|
||||
goto fail;
|
||||
}
|
||||
|
||||
len = pupa_file_read (file, buffer, PUPA_MB_SEARCH);
|
||||
if (len < 32)
|
||||
{
|
||||
pupa_error (PUPA_ERR_BAD_OS, "File too small");
|
||||
goto fail;
|
||||
}
|
||||
|
||||
/* Look for the multiboot header in the buffer. The header should
|
||||
be at least 12 bytes and aligned on a 4-byte boundary. */
|
||||
for (header = (struct pupa_multiboot_header *) buffer;
|
||||
((char *) header <= buffer + len - 12) || (header = 0);
|
||||
(char *)header += 4)
|
||||
{
|
||||
if (header->magic == PUPA_MB_MAGIC
|
||||
&& !(header->magic + header->flags + header->checksum))
|
||||
break;
|
||||
}
|
||||
|
||||
if (header == 0)
|
||||
{
|
||||
pupa_error (PUPA_ERR_BAD_ARGUMENT, "No multiboot header found");
|
||||
goto fail;
|
||||
}
|
||||
|
||||
if (header->flags & PUPA_MB_UNSUPPORTED)
|
||||
{
|
||||
pupa_error (PUPA_ERR_UNKNOWN_OS, "Unsupported flag: 0x%x", header->flags);
|
||||
goto fail;
|
||||
}
|
||||
|
||||
ehdr = (Elf32_Ehdr *) buffer;
|
||||
|
||||
if (!((ehdr->e_ident[EI_MAG0] == ELFMAG0)
|
||||
&& (ehdr->e_ident[EI_MAG1] == ELFMAG1)
|
||||
&& (ehdr->e_ident[EI_MAG2] == ELFMAG2)
|
||||
&& (ehdr->e_ident[EI_MAG3] == ELFMAG3)
|
||||
&& (ehdr->e_ident[EI_CLASS] == ELFCLASS32)
|
||||
&& (ehdr->e_ident[EI_DATA] == ELFDATA2LSB)
|
||||
&& (ehdr->e_ident[EI_VERSION] == EV_CURRENT)
|
||||
&& (ehdr->e_type == ET_EXEC) && (ehdr->e_machine == EM_386)
|
||||
&& (ehdr->e_version == EV_CURRENT)))
|
||||
{
|
||||
pupa_error (PUPA_ERR_UNKNOWN_OS, "No valid ELF header found");
|
||||
goto fail;
|
||||
}
|
||||
|
||||
/* FIXME: Should we support program headers at strange locations? */
|
||||
if (ehdr->e_phoff + ehdr->e_phnum * ehdr->e_phentsize > PUPA_MB_SEARCH)
|
||||
{
|
||||
pupa_error (PUPA_ERR_UNKNOWN_OS, "Program header at a too high offset");
|
||||
goto fail;
|
||||
}
|
||||
|
||||
entry = ehdr->e_entry;
|
||||
|
||||
/* Load every loadable segment in memory. */
|
||||
for (i = 0; i < ehdr->e_phnum; i++)
|
||||
{
|
||||
Elf32_Phdr *phdr;
|
||||
phdr = (Elf32_Phdr *) (buffer + ehdr->e_phoff + i * ehdr->e_phentsize);
|
||||
|
||||
if (phdr->p_type == PT_LOAD)
|
||||
{
|
||||
/* The segment should fit in the area reserved for the OS. */
|
||||
if ((phdr->p_paddr < pupa_os_area_addr)
|
||||
|| (phdr->p_paddr + phdr->p_memsz
|
||||
> pupa_os_area_addr + pupa_os_area_size))
|
||||
{
|
||||
pupa_error (PUPA_ERR_BAD_OS,
|
||||
"Segment doesn't fit in memory reserved for the OS");
|
||||
goto fail;
|
||||
}
|
||||
|
||||
if (pupa_file_seek (file, phdr->p_offset) == -1)
|
||||
{
|
||||
pupa_error (PUPA_ERR_BAD_OS, "Invalid offset in program header");
|
||||
goto fail;
|
||||
}
|
||||
|
||||
if (pupa_file_read (file, (void *) phdr->p_paddr, phdr->p_filesz)
|
||||
!= (pupa_ssize_t) phdr->p_filesz)
|
||||
{
|
||||
pupa_error (PUPA_ERR_BAD_OS, "Couldn't read segment from file");
|
||||
goto fail;
|
||||
}
|
||||
|
||||
if (phdr->p_filesz < phdr->p_memsz)
|
||||
pupa_memset ((char *) phdr->p_paddr + phdr->p_filesz, 0,
|
||||
phdr->p_memsz - phdr->p_filesz);
|
||||
}
|
||||
}
|
||||
|
||||
mbi = pupa_malloc (sizeof (struct pupa_multiboot_info));
|
||||
if (!mbi)
|
||||
goto fail;
|
||||
|
||||
mbi->flags = PUPA_MB_INFO_MEMORY;
|
||||
|
||||
/* Convert from bytes to kilobytes. */
|
||||
mbi->mem_lower = pupa_lower_mem / 1024;
|
||||
mbi->mem_upper = pupa_upper_mem / 1024;
|
||||
|
||||
for (i = 0, len = 0; i < argc; i++)
|
||||
len += pupa_strlen (argv[i]) + 1;
|
||||
|
||||
cmdline = p = pupa_malloc (len);
|
||||
if (!cmdline)
|
||||
goto fail;
|
||||
|
||||
for (i = 0; i < argc; i++)
|
||||
{
|
||||
p = pupa_stpcpy (p, argv[i]);
|
||||
*(p++) = ' ';
|
||||
}
|
||||
|
||||
/* Remove the space after the last word. */
|
||||
*(--p) = '\0';
|
||||
|
||||
mbi->flags |= PUPA_MB_INFO_CMDLINE;
|
||||
mbi->cmdline = (pupa_uint32_t) cmdline;
|
||||
|
||||
mbi->flags |= PUPA_MB_INFO_BOOT_LOADER_NAME;
|
||||
mbi->boot_loader_name = (pupa_uint32_t) pupa_strdup (PACKAGE_STRING);
|
||||
|
||||
pupa_loader_set (pupa_multiboot_boot, pupa_multiboot_unload);
|
||||
|
||||
fail:
|
||||
if (file)
|
||||
pupa_file_close (file);
|
||||
|
||||
if (pupa_errno != PUPA_ERR_NONE)
|
||||
{
|
||||
pupa_free (cmdline);
|
||||
pupa_free (mbi);
|
||||
pupa_dl_unref (my_mod);
|
||||
}
|
||||
}
|
||||
|
||||
|
||||
void
|
||||
pupa_rescue_cmd_module (int argc, char *argv[])
|
||||
{
|
||||
pupa_file_t file = 0;
|
||||
pupa_ssize_t size, len = 0;
|
||||
char *module = 0, *cmdline = 0, *p;
|
||||
int i;
|
||||
|
||||
if (argc == 0)
|
||||
{
|
||||
pupa_error (PUPA_ERR_BAD_ARGUMENT, "No module specified");
|
||||
goto fail;
|
||||
}
|
||||
|
||||
if (!mbi)
|
||||
{
|
||||
pupa_error (PUPA_ERR_BAD_ARGUMENT,
|
||||
"You need to load the multiboot kernel first");
|
||||
goto fail;
|
||||
}
|
||||
|
||||
file = pupa_file_open (argv[0]);
|
||||
if (!file)
|
||||
goto fail;
|
||||
|
||||
size = pupa_file_size (file);
|
||||
module = pupa_memalign (PUPA_MB_MOD_ALIGN, size);
|
||||
if (!module)
|
||||
goto fail;
|
||||
|
||||
if (pupa_file_read (file, module, size) != size)
|
||||
{
|
||||
pupa_error (PUPA_ERR_FILE_READ_ERROR, "Couldn't read file");
|
||||
goto fail;
|
||||
}
|
||||
|
||||
for (i = 0; i < argc; i++)
|
||||
len += pupa_strlen (argv[i]) + 1;
|
||||
|
||||
cmdline = p = pupa_malloc (len);
|
||||
if (!cmdline)
|
||||
goto fail;
|
||||
|
||||
for (i = 0; i < argc; i++)
|
||||
{
|
||||
p = pupa_stpcpy (p, argv[i]);
|
||||
*(p++) = ' ';
|
||||
}
|
||||
|
||||
/* Remove the space after the last word. */
|
||||
*(--p) = '\0';
|
||||
|
||||
if (mbi->flags & PUPA_MB_INFO_MODS)
|
||||
{
|
||||
struct pupa_mod_list *modlist = (struct pupa_mod_list *) mbi->mods_addr;
|
||||
|
||||
modlist = pupa_realloc (modlist, (mbi->mods_count + 1)
|
||||
* sizeof (struct pupa_mod_list));
|
||||
if (!modlist)
|
||||
goto fail;
|
||||
mbi->mods_addr = (pupa_uint32_t) modlist;
|
||||
modlist += mbi->mods_count;
|
||||
modlist->mod_start = (pupa_uint32_t) module;
|
||||
modlist->mod_end = (pupa_uint32_t) module + size;
|
||||
modlist->cmdline = (pupa_uint32_t) cmdline;
|
||||
modlist->pad = 0;
|
||||
mbi->mods_count++;
|
||||
}
|
||||
else
|
||||
{
|
||||
struct pupa_mod_list *modlist = pupa_malloc (sizeof (struct pupa_mod_list));
|
||||
if (!modlist)
|
||||
goto fail;
|
||||
modlist->mod_start = (pupa_uint32_t) module;
|
||||
modlist->mod_end = (pupa_uint32_t) module + size;
|
||||
modlist->cmdline = (pupa_uint32_t) cmdline;
|
||||
modlist->pad = 0;
|
||||
mbi->mods_count = 1;
|
||||
mbi->mods_addr = (pupa_uint32_t) modlist;
|
||||
mbi->flags |= PUPA_MB_INFO_MODS;
|
||||
}
|
||||
|
||||
fail:
|
||||
if (file)
|
||||
pupa_file_close (file);
|
||||
|
||||
if (pupa_errno != PUPA_ERR_NONE)
|
||||
{
|
||||
pupa_free (module);
|
||||
pupa_free (cmdline);
|
||||
}
|
||||
}
|
||||
|
||||
|
||||
PUPA_MOD_INIT
|
||||
{
|
||||
pupa_rescue_register_command ("multiboot", pupa_rescue_cmd_multiboot,
|
||||
"load a multiboot kernel");
|
||||
pupa_rescue_register_command ("module", pupa_rescue_cmd_module,
|
||||
"load a multiboot module");
|
||||
my_mod = mod;
|
||||
}
|
||||
|
||||
PUPA_MOD_FINI
|
||||
{
|
||||
pupa_rescue_unregister_command ("multiboot");
|
||||
pupa_rescue_unregister_command ("module");
|
||||
}
|
||||
Loading…
Reference in a new issue