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2010-01-07 Robert Millan <rmh.grub@aybabtu.com>

Browse source 
Reset Multiboot 2 support.  New loader implements the draft in
	/branches/multiboot2 and shares as much code as possible with the
	production Multiboot 1 implementation.
	
	* loader/ieee1275/multiboot2.c: Remove file.  Update all users.
	* loader/multiboot2.c: Likewise.
	* loader/i386/multiboot_helper.S: Likewise.
	* include/multiboot2.h: Replace with latest version from the draft
	in /branches/multiboot2.
	
	* conf/i386-coreboot.rmk (multiboot_mod_SOURCES): Remove
	`loader/i386/multiboot_helper.S', `loader/i386/pc/multiboot2.c'
	and `loader/multiboot2.c'.
	(pkglib_MODULES): Add `multiboot2.mod'.
	(multiboot2_mod_SOURCES): New variable.
	(multiboot2_mod_LDFLAGS): Likewise.
	(multiboot2_mod_CFLAGS): Likewise.  Define `GRUB_USE_MULTIBOOT2'.
	
	* conf/i386-pc.rmk: Likewise.
	
	* conf/powerpc-ieee1275.rmk (pkglib_MODULES): Remove `multiboot.mod'.
	(multiboot_mod_SOURCES): Remove variable.
	(multiboot_mod_LDFLAGS): Likewise.
	(multiboot_mod_CFLAGS): Likewise.
	
	* include/grub/multiboot.h [GRUB_USE_MULTIBOOT2]: Include
	`<multiboot2.h>' instead of `<multiboot.h>'.
	[GRUB_USE_MULTIBOOT2] (MULTIBOOT_BOOTLOADER_MAGIC)
	(MULTIBOOT_HEADER_MAGIC): New macros.
	
	* loader/multiboot_loader.c (module_version_status): Remove variable.
	(find_multi_boot2_header): Remove function.
	(grub_cmd_multiboot_loader): Remove Multiboot 2 / Multiboot 1 selection
	logic.  Always check for the Multiboot version we're compiling for.
	(grub_cmd_module_loader): Likewise.
	[GRUB_USE_MULTIBOOT2] (GRUB_MOD_INIT(multiboot)): Register `multiboot2'
	command instead of `multiboot'.
This commit is contained in:
Robert Millan 2010-01-07 21:05:25 +00:00
parent 5d2c52b8ca
commit bc8b32b3ec
10 changed files with 266 additions and 823 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

40
ChangeLog
View file

@ -1,3 +1,43 @@
2010-01-07 Robert Millan <rmh.grub@aybabtu.com>
Reset Multiboot 2 support. New loader implements the draft in
/branches/multiboot2 and shares as much code as possible with the
production Multiboot 1 implementation.
* loader/ieee1275/multiboot2.c: Remove file. Update all users.
* loader/multiboot2.c: Likewise.
* loader/i386/multiboot_helper.S: Likewise.
* include/multiboot2.h: Replace with latest version from the draft
in /branches/multiboot2.
* conf/i386-coreboot.rmk (multiboot_mod_SOURCES): Remove
`loader/i386/multiboot_helper.S', `loader/i386/pc/multiboot2.c'
and `loader/multiboot2.c'.
(pkglib_MODULES): Add `multiboot2.mod'.
(multiboot2_mod_SOURCES): New variable.
(multiboot2_mod_LDFLAGS): Likewise.
(multiboot2_mod_CFLAGS): Likewise. Define `GRUB_USE_MULTIBOOT2'.
* conf/i386-pc.rmk: Likewise.
* conf/powerpc-ieee1275.rmk (pkglib_MODULES): Remove `multiboot.mod'.
(multiboot_mod_SOURCES): Remove variable.
(multiboot_mod_LDFLAGS): Likewise.
(multiboot_mod_CFLAGS): Likewise.
* include/grub/multiboot.h [GRUB_USE_MULTIBOOT2]: Include
`<multiboot2.h>' instead of `<multiboot.h>'.
[GRUB_USE_MULTIBOOT2] (MULTIBOOT_BOOTLOADER_MAGIC)
(MULTIBOOT_HEADER_MAGIC): New macros.
* loader/multiboot_loader.c (module_version_status): Remove variable.
(find_multi_boot2_header): Remove function.
(grub_cmd_multiboot_loader): Remove Multiboot 2 / Multiboot 1 selection
logic. Always check for the Multiboot version we're compiling for.
(grub_cmd_module_loader): Likewise.
[GRUB_USE_MULTIBOOT2] (GRUB_MOD_INIT(multiboot)): Register `multiboot2'
command instead of `multiboot'.
2010-01-07 Robert Millan <rmh.grub@aybabtu.com>
* include/multiboot.h (MULTIBOOT_UNSUPPORTED): Moved from here ...

14
conf/i386-coreboot.rmk
View file

@ -102,7 +102,7 @@ bin_SCRIPTS += grub-mkrescue
grub_mkrescue_SOURCES = util/grub-mkrescue.in
# Modules.
pkglib_MODULES = linux.mod multiboot.mod \
pkglib_MODULES = linux.mod \
aout.mod play.mod serial.mod \
memdisk.mod pci.mod lspci.mod reboot.mod \
halt.mod datetime.mod date.mod datehook.mod \
@ -140,16 +140,20 @@ serial_mod_SOURCES = term/i386/pc/serial.c
serial_mod_CFLAGS = $(COMMON_CFLAGS)
serial_mod_LDFLAGS = $(COMMON_LDFLAGS)
# For multiboot.mod.
pkglib_MODULES += multiboot.mod
multiboot_mod_SOURCES = loader/i386/multiboot.c \
loader/i386/multiboot_helper.S \
loader/i386/pc/multiboot2.c \
loader/multiboot2.c \
loader/multiboot_loader.c
multiboot_mod_CFLAGS = $(COMMON_CFLAGS)
multiboot_mod_LDFLAGS = $(COMMON_LDFLAGS)
multiboot_mod_ASFLAGS = $(COMMON_ASFLAGS)
pkglib_MODULES += multiboot2.mod
multiboot2_mod_SOURCES = loader/i386/multiboot.c \
loader/multiboot_loader.c
multiboot2_mod_CFLAGS = $(COMMON_CFLAGS) -DGRUB_USE_MULTIBOOT2
multiboot2_mod_LDFLAGS = $(COMMON_LDFLAGS)
multiboot2_mod_ASFLAGS = $(COMMON_ASFLAGS)
# For aout.mod.
aout_mod_SOURCES = loader/aout.c
aout_mod_CFLAGS = $(COMMON_CFLAGS)

14
conf/i386-pc.rmk
View file

@ -116,7 +116,7 @@ bin_SCRIPTS += grub-mkrescue
grub_mkrescue_SOURCES = util/grub-mkrescue.in
pkglib_MODULES = biosdisk.mod chain.mod \
multiboot.mod reboot.mod halt.mod \
reboot.mod halt.mod \
vbe.mod vbetest.mod vbeinfo.mod play.mod serial.mod \
vga.mod memdisk.mod pci.mod lspci.mod \
aout.mod bsd.mod pxe.mod pxecmd.mod datetime.mod date.mod \
@ -201,16 +201,20 @@ serial_mod_SOURCES = term/i386/pc/serial.c
serial_mod_CFLAGS = $(COMMON_CFLAGS)
serial_mod_LDFLAGS = $(COMMON_LDFLAGS)
# For multiboot.mod.
pkglib_MODULES += multiboot.mod
multiboot_mod_SOURCES = loader/i386/multiboot.c \
loader/i386/multiboot_helper.S \
loader/i386/pc/multiboot2.c \
loader/multiboot2.c \
loader/multiboot_loader.c
multiboot_mod_CFLAGS = $(COMMON_CFLAGS)
multiboot_mod_LDFLAGS = $(COMMON_LDFLAGS)
multiboot_mod_ASFLAGS = $(COMMON_ASFLAGS)
pkglib_MODULES += multiboot2.mod
multiboot2_mod_SOURCES = loader/i386/multiboot.c \
loader/multiboot_loader.c
multiboot2_mod_CFLAGS = $(COMMON_CFLAGS) -DGRUB_USE_MULTIBOOT2
multiboot2_mod_LDFLAGS = $(COMMON_LDFLAGS)
multiboot2_mod_ASFLAGS = $(COMMON_ASFLAGS)
# For vbe.mod.
vbe_mod_SOURCES = video/i386/pc/vbe.c
vbe_mod_CFLAGS = $(COMMON_CFLAGS)

8
conf/powerpc-ieee1275.rmk
View file

@ -61,7 +61,6 @@ pkglib_MODULES = halt.mod \
linux.mod \
reboot.mod \
suspend.mod \
multiboot.mod \
memdisk.mod \
lsmmap.mod
@ -91,13 +90,6 @@ halt_mod_SOURCES = commands/halt.c
halt_mod_CFLAGS = $(COMMON_CFLAGS)
halt_mod_LDFLAGS = $(COMMON_LDFLAGS)
# For multiboot.mod
multiboot_mod_SOURCES = loader/ieee1275/multiboot2.c \
loader/multiboot2.c \
loader/multiboot_loader.c
multiboot_mod_CFLAGS = $(COMMON_CFLAGS)
multiboot_mod_LDFLAGS = $(COMMON_LDFLAGS)
# For memdisk.mod.
memdisk_mod_SOURCES = disk/memdisk.c
memdisk_mod_CFLAGS = $(COMMON_CFLAGS)

9
include/grub/multiboot.h
View file

@ -1,7 +1,7 @@
/* multiboot.h - multiboot header file with grub definitions. */
/*
* GRUB -- GRand Unified Bootloader
* Copyright (C) 2003,2007,2008 Free Software Foundation, Inc.
* Copyright (C) 2003,2007,2008,2010 Free Software Foundation, Inc.
*
* GRUB is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
@ -20,7 +20,14 @@
#ifndef GRUB_MULTIBOOT_HEADER
#define GRUB_MULTIBOOT_HEADER 1
#ifdef GRUB_USE_MULTIBOOT2
#include <multiboot2.h>
/* Same thing as far as our loader is concerned. */
#define MULTIBOOT_BOOTLOADER_MAGIC MULTIBOOT2_BOOTLOADER_MAGIC
#define MULTIBOOT_HEADER_MAGIC MULTIBOOT2_HEADER_MAGIC
#else
#include <multiboot.h>
#endif
void grub_multiboot (int argc, char *argv[]);
void grub_module (int argc, char *argv[]);

258
include/multiboot2.h
View file

@ -1,110 +1,220 @@
/* multiboot2.h - multiboot 2 header file. */
/*
* GRUB -- GRand Unified Bootloader
* Copyright (C) 2007,2009 Free Software Foundation, Inc.
/* multiboot2.h - Multiboot 2 header file. */
/* Copyright (C) 1999,2003,2007,2008,2009,2010 Free Software Foundation, Inc.
*
* GRUB 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 3 of the License, or
* (at your option) any later version.
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to
* deal in the Software without restriction, including without limitation the
* rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
* sell copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* GRUB 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.
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* You should have received a copy of the GNU General Public License
* along with GRUB. If not, see <http://www.gnu.org/licenses/>.
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL ANY
* DEVELOPER OR DISTRIBUTOR BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
* WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR
* IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
*/
#ifndef MULTIBOOT2_HEADER
#define MULTIBOOT2_HEADER 1
#ifndef MULTIBOOT_HEADER
#define MULTIBOOT_HEADER 1
/* How many bytes from the start of the file we search for the header. */
#define MULTIBOOT2_HEADER_SEARCH 8192
#define MULTIBOOT_SEARCH 8192
/* The magic field should contain this. */
#define MULTIBOOT2_HEADER_MAGIC 0xe85250d6
/* Passed from the bootloader to the kernel. */
/* This should be in %eax. */
#define MULTIBOOT2_BOOTLOADER_MAGIC 0x36d76289
/* Alignment of multiboot modules. */
#define MULTIBOOT2_MOD_ALIGN 0x00001000
#define MULTIBOOT_MOD_ALIGN 0x00001000
/* Alignment of the multiboot info structure. */
#define MULTIBOOT_INFO_ALIGN 0x00000004
/* Flags set in the 'flags' member of the multiboot header. */
/* Align all boot modules on i386 page (4KB) boundaries. */
#define MULTIBOOT_PAGE_ALIGN 0x00000001
/* Must pass memory information to OS. */
#define MULTIBOOT_MEMORY_INFO 0x00000002
/* Must pass video information to OS. */
#define MULTIBOOT_VIDEO_MODE 0x00000004
/* This flag indicates the use of the address fields in the header. */
#define MULTIBOOT_AOUT_KLUDGE 0x00010000
/* Flags to be set in the 'flags' member of the multiboot info structure. */
/* is there basic lower/upper memory information? */
#define MULTIBOOT_INFO_MEMORY 0x00000001
/* is there a boot device set? */
#define MULTIBOOT_INFO_BOOTDEV 0x00000002
/* is the command-line defined? */
#define MULTIBOOT_INFO_CMDLINE 0x00000004
/* are there modules to do something with? */
#define MULTIBOOT_INFO_MODS 0x00000008
/* These next two are mutually exclusive */
/* is there a symbol table loaded? */
#define MULTIBOOT_INFO_AOUT_SYMS 0x00000010
/* is there an ELF section header table? */
#define MULTIBOOT_INFO_ELF_SHDR 0X00000020
/* is there a full memory map? */
#define MULTIBOOT_INFO_MEM_MAP 0x00000040
/* Is there drive info? */
#define MULTIBOOT_INFO_DRIVE_INFO 0x00000080
/* Is there a config table? */
#define MULTIBOOT_INFO_CONFIG_TABLE 0x00000100
/* Is there a boot loader name? */
#define MULTIBOOT_INFO_BOOT_LOADER_NAME 0x00000200
/* Is there a APM table? */
#define MULTIBOOT_INFO_APM_TABLE 0x00000400
/* Is there video information? */
#define MULTIBOOT_INFO_VIDEO_INFO 0x00000800
#ifndef ASM_FILE
#ifndef __WORDSIZE
#include <stdint.h>
#endif
typedef unsigned short multiboot_uint16_t;
typedef unsigned int multiboot_uint32_t;
typedef unsigned long long multiboot_uint64_t;
/* XXX not portable? */
#if __WORDSIZE == 64
typedef uint64_t multiboot2_word;
#else
typedef uint32_t multiboot2_word;
#endif
struct multiboot2_header
struct multiboot_header
{
uint32_t magic;
uint32_t flags;
/* Must be MULTIBOOT_MAGIC - see above. */
multiboot_uint32_t magic;
/* Feature flags. */
multiboot_uint32_t flags;
/* The above fields plus this one must equal 0 mod 2^32. */
multiboot_uint32_t checksum;
/* These are only valid if MULTIBOOT_AOUT_KLUDGE is set. */
multiboot_uint32_t header_addr;
multiboot_uint32_t load_addr;
multiboot_uint32_t load_end_addr;
multiboot_uint32_t bss_end_addr;
multiboot_uint32_t entry_addr;
/* These are only valid if MULTIBOOT_VIDEO_MODE is set. */
multiboot_uint32_t mode_type;
multiboot_uint32_t width;
multiboot_uint32_t height;
multiboot_uint32_t depth;
};
struct multiboot2_tag_header
/* The symbol table for a.out. */
struct multiboot_aout_symbol_table
{
uint32_t key;
uint32_t len;
multiboot_uint32_t tabsize;
multiboot_uint32_t strsize;
multiboot_uint32_t addr;
multiboot_uint32_t reserved;
};
typedef struct multiboot_aout_symbol_table multiboot_aout_symbol_table_t;
#define MULTIBOOT2_TAG_RESERVED1 0
#define MULTIBOOT2_TAG_RESERVED2 (~0)
#define MULTIBOOT2_TAG_START 1
struct multiboot2_tag_start
/* The section header table for ELF. */
struct multiboot_elf_section_header_table
{
struct multiboot2_tag_header header;
multiboot2_word size; /* Total size of all multiboot tags. */
multiboot_uint32_t num;
multiboot_uint32_t size;
multiboot_uint32_t addr;
multiboot_uint32_t shndx;
};
typedef struct multiboot_elf_section_header_table multiboot_elf_section_header_table_t;
#define MULTIBOOT2_TAG_NAME 2
struct multiboot2_tag_name
struct multiboot_info
{
struct multiboot2_tag_header header;
char name[1];
};
/* Multiboot info version number */
multiboot_uint32_t flags;
#define MULTIBOOT2_TAG_MODULE 3
struct multiboot2_tag_module
{
struct multiboot2_tag_header header;
multiboot2_word addr;
multiboot2_word size;
char type[36];
char cmdline[1];
};
/* Available memory from BIOS */
multiboot_uint32_t mem_lower;
multiboot_uint32_t mem_upper;
#define MULTIBOOT2_TAG_MEMORY 4
struct multiboot2_tag_memory
{
struct multiboot2_tag_header header;
multiboot2_word addr;
multiboot2_word size;
multiboot2_word type;
};
/* "root" partition */
multiboot_uint32_t boot_device;
#define MULTIBOOT2_TAG_UNUSED 5
struct multiboot2_tag_unused
{
struct multiboot2_tag_header header;
};
/* Kernel command line */
multiboot_uint32_t cmdline;
#define MULTIBOOT2_TAG_END 0xffff
struct multiboot2_tag_end
{
struct multiboot2_tag_header header;
/* Boot-Module list */
multiboot_uint32_t mods_count;
multiboot_uint32_t mods_addr;
union
{
multiboot_aout_symbol_table_t aout_sym;
multiboot_elf_section_header_table_t elf_sec;
} u;
/* Memory Mapping buffer */
multiboot_uint32_t mmap_length;
multiboot_uint32_t mmap_addr;
/* Drive Info buffer */
multiboot_uint32_t drives_length;
multiboot_uint32_t drives_addr;
/* ROM configuration table */
multiboot_uint32_t config_table;
/* Boot Loader Name */
multiboot_uint32_t boot_loader_name;
/* APM table */
multiboot_uint32_t apm_table;
/* Video */
multiboot_uint32_t vbe_control_info;
multiboot_uint32_t vbe_mode_info;
multiboot_uint16_t vbe_mode;
multiboot_uint16_t vbe_interface_seg;
multiboot_uint16_t vbe_interface_off;
multiboot_uint16_t vbe_interface_len;
};
typedef struct multiboot_info multiboot_info_t;
struct multiboot_mmap_entry
{
multiboot_uint32_t size;
multiboot_uint64_t addr;
multiboot_uint64_t len;
#define MULTIBOOT_MEMORY_AVAILABLE 1
#define MULTIBOOT_MEMORY_RESERVED 2
multiboot_uint32_t type;
} __attribute__((packed));
typedef struct multiboot_mmap_entry multiboot_memory_map_t;
struct multiboot_mod_list
{
/* the memory used goes from bytes 'mod_start' to 'mod_end-1' inclusive */
multiboot_uint32_t mod_start;
multiboot_uint32_t mod_end;
/* Module command line */
multiboot_uint32_t cmdline;
/* padding to take it to 16 bytes (must be zero) */
multiboot_uint32_t pad;
};
typedef struct multiboot_mod_list multiboot_module_t;
#endif /* ! ASM_FILE */
#endif /* ! MULTIBOOT2_HEADER */
#endif /* ! MULTIBOOT_HEADER */

43
loader/i386/multiboot_helper.S
View file

@ -1,43 +0,0 @@
/*
* GRUB -- GRand Unified Bootloader
* Copyright (C) 1999,2000,2001,2002,2003,2005,2006,2007,2008,2009 Free Software Foundation, Inc.
*
* GRUB 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 3 of the License, or
* (at your option) any later version.
*
* GRUB 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 GRUB. If not, see <http://www.gnu.org/licenses/>.
*/
#include <grub/symbol.h>
#include <multiboot.h>
#include <multiboot2.h>
.p2align 2 /* force 4-byte alignment */
/*
* This starts the multiboot 2 kernel.
*/
FUNCTION(grub_multiboot2_real_boot)
/* Push the entry address on the stack. */
pushl %eax
/* Move the address of the multiboot information structure to ebx. */
movl %edx,%ebx
/* Interrupts should be disabled. */
cli
/* Move the magic value into eax and jump to the kernel. */
movl $MULTIBOOT2_BOOTLOADER_MAGIC,%eax
popl %ecx
cld
jmp *%ecx

147
loader/ieee1275/multiboot2.c
View file

@ -1,147 +0,0 @@
/* multiboot.c - boot a multiboot 2 OS image. */
/*
* GRUB -- GRand Unified Bootloader
* Copyright (C) 2007,2009 Free Software Foundation, Inc.
*
* GRUB 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 3 of the License, or
* (at your option) any later version.
*
* GRUB 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 GRUB. If not, see <http://www.gnu.org/licenses/>.
*/
#include <grub/loader.h>
#include <grub/ieee1275/ieee1275.h>
#include <grub/multiboot2.h>
#include <multiboot2.h>
#include <grub/err.h>
#include <grub/elf.h>
#include <grub/misc.h>
#include <grub/mm.h>
#include <grub/machine/kernel.h>
#include <grub/machine/loader.h>
#ifdef __i386__
#include <grub/cpu/multiboot.h>
#endif
typedef void (*kernel_entry_t) (unsigned long, void *, int (void *),
unsigned long, unsigned long);
/* Claim the memory occupied by the multiboot kernel. */
grub_err_t
grub_mb2_arch_elf32_hook (Elf32_Phdr *phdr,
grub_addr_t *addr __attribute__((unused)),
int *do_load)
{
int rc;
if (phdr->p_type != PT_LOAD)
{
*do_load = 0;
return 0;
}
*do_load = 1;
rc = grub_claimmap (phdr->p_paddr, phdr->p_memsz);
if (rc)
return grub_error(GRUB_ERR_OUT_OF_MEMORY, "couldn't claim %x - %x",
phdr->p_paddr, phdr->p_paddr + phdr->p_memsz);
grub_dprintf ("loader", "Loading segment at 0x%x - 0x%x\n", phdr->p_paddr,
phdr->p_paddr + phdr->p_memsz);
return GRUB_ERR_NONE;
}
/* Claim the memory occupied by the multiboot kernel. */
grub_err_t
grub_mb2_arch_elf64_hook (Elf64_Phdr *phdr,
grub_addr_t *addr __attribute__((unused)),
int *do_load)
{
int rc;
if (phdr->p_type != PT_LOAD)
{
*do_load = 0;
return 0;
}
*do_load = 1;
rc = grub_claimmap (phdr->p_paddr, phdr->p_memsz);
if (rc)
return grub_error(GRUB_ERR_OUT_OF_MEMORY, "couldn't claim 0x%lx - 0x%lx",
phdr->p_paddr, phdr->p_paddr + phdr->p_memsz);
grub_dprintf ("loader", "Loading segment at 0x%lx - 0x%lx\n",
(unsigned long) phdr->p_paddr,
(unsigned long) (phdr->p_paddr + phdr->p_memsz));
return GRUB_ERR_NONE;
}
grub_err_t
grub_mb2_arch_module_alloc (grub_size_t size, grub_addr_t *addr)
{
int rc;
/* XXX Will need to map on some firmwares. */
rc = grub_ieee1275_claim (0, size, MULTIBOOT2_MOD_ALIGN, addr);
if (rc)
return grub_error (GRUB_ERR_OUT_OF_MEMORY,
"firmware couldn't allocate memory (size 0x%lx)", size);
return GRUB_ERR_NONE;
}
grub_err_t
grub_mb2_arch_module_free (grub_addr_t addr, grub_size_t size)
{
grub_ieee1275_release (addr, size);
return GRUB_ERR_NONE;
}
grub_err_t
grub_mb2_tags_arch_create (void)
{
/* Nothing special. */
return GRUB_ERR_NONE;
}
/* Release the memory we claimed from Open Firmware above. */
void
grub_mb2_arch_unload (struct multiboot2_tag_header *tags)
{
struct multiboot2_tag_header *tag;
/* Free all module memory in the tag list. */
for_each_tag (tag, tags)
{
if (tag->key == MULTIBOOT2_TAG_MODULE)
{
struct multiboot2_tag_module *module =
(struct multiboot2_tag_module *) tag;
grub_ieee1275_release (module->addr, module->size);
}
}
}
void
grub_mb2_arch_boot (grub_addr_t entry_addr, void *tags)
{
#if defined(__powerpc__)
kernel_entry_t entry = (kernel_entry_t) entry_addr;
entry (MULTIBOOT2_BOOTLOADER_MAGIC, tags, grub_ieee1275_entry_fn, 0, 0);
#elif defined(__i386__)
grub_multiboot2_real_boot (entry_addr, tags);
#else
#error
#endif
}

461
loader/multiboot2.c
View file

@ -1,461 +0,0 @@
/* multiboot2.c - boot a multiboot 2 OS image. */
/*
* GRUB -- GRand Unified Bootloader
* Copyright (C) 2007,2009 Free Software Foundation, Inc.
*
* GRUB 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 3 of the License, or
* (at your option) any later version.
*
* GRUB 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 GRUB. If not, see <http://www.gnu.org/licenses/>.
*/
#include <grub/loader.h>
#include <grub/machine/loader.h>
#include <grub/multiboot2.h>
#include <multiboot2.h>
#include <grub/elfload.h>
#include <grub/file.h>
#include <grub/err.h>
#include <grub/dl.h>
#include <grub/mm.h>
#include <grub/misc.h>
#include <grub/gzio.h>
static grub_addr_t entry;
extern grub_dl_t my_mod;
static char *grub_mb2_tags;
static char *grub_mb2_tags_pos;
static grub_size_t grub_mb2_tags_len;
static int grub_mb2_tags_count;
static void
grub_mb2_tags_free (void)
{
grub_dprintf ("loader", "Freeing all tags...\n");
grub_free (grub_mb2_tags);
grub_mb2_tags = 0;
grub_mb2_tags_pos = 0;
grub_mb2_tags_len = 0;
grub_mb2_tags_count = 0;
}
grub_err_t
grub_mb2_tag_alloc (grub_addr_t *addr, int key, grub_size_t len)
{
struct multiboot2_tag_header *tag;
grub_size_t used;
grub_size_t needed;
grub_dprintf ("loader", "Allocating tag: key 0x%x, size 0x%lx.\n",
key, (unsigned long) len);
used = grub_mb2_tags_pos - grub_mb2_tags;
len = ALIGN_UP (len, sizeof (multiboot2_word));
needed = used + len;
if (needed > grub_mb2_tags_len)
{
/* Allocate new buffer. */
grub_size_t newsize = needed * 2;
char *newarea;
grub_dprintf ("loader", "Reallocating tag buffer (new size 0x%lx).\n",
(unsigned long) newsize);
newarea = grub_malloc (newsize);
if (! newarea)
return grub_errno;
grub_memcpy (newarea, grub_mb2_tags, grub_mb2_tags_len);
grub_free (grub_mb2_tags);
grub_mb2_tags_len = newsize;
grub_mb2_tags = newarea;
grub_mb2_tags_pos = newarea + used;
}
tag = (struct multiboot2_tag_header *) grub_mb2_tags_pos;
grub_mb2_tags_pos += len;
tag->key = key;
tag->len = len;
if (addr)
*addr = (grub_addr_t) tag;
grub_mb2_tags_count++;
grub_dprintf ("loader", "Allocated tag %u at %p.\n", grub_mb2_tags_count, tag);
return 0;
}
static grub_err_t
grub_mb2_tag_start_create (void)
{
return grub_mb2_tag_alloc (0, MULTIBOOT2_TAG_START,
sizeof (struct multiboot2_tag_start));
}
static grub_err_t
grub_mb2_tag_name_create (void)
{
struct multiboot2_tag_name *name;
grub_addr_t name_addr;
grub_err_t err;
const char *grub_version = PACKAGE_STRING;
err = grub_mb2_tag_alloc (&name_addr, MULTIBOOT2_TAG_NAME,
sizeof (struct multiboot2_tag_name) +
sizeof (grub_version) + 1);
if (err)
return err;
name = (struct multiboot2_tag_name *) name_addr;
grub_strcpy (name->name, grub_version);
return GRUB_ERR_NONE;
}
typedef grub_err_t (*tag_create_t) (void);
static tag_create_t grub_mb2_tag_creators[] = {
grub_mb2_tag_start_create,
grub_mb2_tag_name_create,
grub_mb2_tags_arch_create,
0,
};
static grub_err_t
grub_mb2_tags_create (void)
{
tag_create_t *creator;
grub_err_t err;
for (creator = grub_mb2_tag_creators; *creator != 0; creator++)
{
err = (*creator) ();
if (err)
goto error;
}
return GRUB_ERR_NONE;
error:
grub_error_push ();
grub_mb2_tags_free ();
grub_error_pop ();
return err;
}
static grub_err_t
grub_mb2_tags_finish (void)
{
struct multiboot2_tag_start *start;
grub_err_t err;
/* Create the `end' tag. */
err = grub_mb2_tag_alloc (0, MULTIBOOT2_TAG_END,
sizeof (struct multiboot2_tag_end));
if (err)
goto error;
/* We created the `start' tag first. Update it now. */
start = (struct multiboot2_tag_start *) grub_mb2_tags;
start->size = grub_mb2_tags_pos - grub_mb2_tags;
return GRUB_ERR_NONE;
error:
grub_error_push ();
grub_mb2_tags_free ();
grub_error_pop ();
return err;
}
static grub_err_t
grub_mb2_boot (void)
{
grub_mb2_tags_finish ();
grub_dprintf ("loader", "Tags at %p\n", grub_mb2_tags);
grub_mb2_arch_boot (entry, grub_mb2_tags);
/* Not reached. */
return GRUB_ERR_NONE;
}
static grub_err_t
grub_mb2_unload (void)
{
struct multiboot2_tag_header *tag;
struct multiboot2_tag_header *tags =
(struct multiboot2_tag_header *) grub_mb2_tags;
/* Free all module memory in the tag list. */
for_each_tag (tag, tags)
{
if (tag->key == MULTIBOOT2_TAG_MODULE)
{
struct multiboot2_tag_module *module =
(struct multiboot2_tag_module *) tag;
grub_free ((void *) module->addr);
}
}
/* Allow architecture to un-reserve memory. */
grub_mb2_arch_unload (tags);
/* Free the tags themselves. */
grub_mb2_tags_free ();
grub_dl_unref (my_mod);
return GRUB_ERR_NONE;
}
static grub_err_t
grub_mb2_load_other (grub_file_t file __attribute__ ((unused)),
void *buffer __attribute__ ((unused)))
{
/* XXX Create module tag here. */
return grub_error (GRUB_ERR_UNKNOWN_OS, "currently only ELF is supported");
}
/* Create the tag containing the cmdline and the address of the module data. */
static grub_err_t
grub_mb2_tag_module_create (grub_addr_t modaddr, grub_size_t modsize,
char *type, int key, int argc, char *argv[])
{
struct multiboot2_tag_module *module;
grub_ssize_t argslen = 0;
grub_err_t err;
char *p;
grub_addr_t module_addr;
int i;
/* Allocate enough space for the arguments and spaces between them. */
for (i = 0; i < argc; i++)
argslen += grub_strlen (argv[i]) + 1;
/* Note: includes implicit 1-byte cmdline. */
err = grub_mb2_tag_alloc (&module_addr, key,
sizeof (struct multiboot2_tag_module) + argslen);
if (err)
return grub_errno;
module = (struct multiboot2_tag_module *) module_addr;
module->addr = modaddr;
module->size = modsize;
grub_strcpy(module->type, type);
/* Fill in the command line. */
p = module->cmdline;
for (i = 0; i < argc; i++)
{
p = grub_stpcpy (p, argv[i]);
*p++ = ' ';
}
module->cmdline[argslen] = '\0';
return GRUB_ERR_NONE;
}
/* Load ELF32 or ELF64. */
static grub_err_t
grub_mb2_load_elf (grub_elf_t elf, int argc, char *argv[])
{
grub_addr_t kern_base;
grub_size_t kern_size;
grub_err_t err;
if (grub_elf_is_elf32 (elf))
{
entry = elf->ehdr.ehdr32.e_entry;
err = grub_elf32_load (elf, grub_mb2_arch_elf32_hook, &kern_base,
&kern_size);
}
else if (grub_elf_is_elf64 (elf))
{
entry = elf->ehdr.ehdr64.e_entry;
err = grub_elf64_load (elf, grub_mb2_arch_elf64_hook, &kern_base,
&kern_size);
}
else
err = grub_error (GRUB_ERR_UNKNOWN_OS, "unknown ELF class");
if (err)
goto fail;
grub_dprintf ("loader", "Entry point is 0x%lx.\n", (unsigned long) entry);
grub_mb2_tag_module_create (kern_base, kern_size, "kernel",
MULTIBOOT2_TAG_MODULE, argc, argv);
fail:
return err;
}
void
grub_multiboot2 (int argc, char *argv[])
{
char *buffer;
grub_file_t file = 0;
grub_elf_t elf = 0;
struct multiboot2_header *header = 0;
char *p;
grub_ssize_t len;
grub_err_t err;
int header_found = 0;
grub_loader_unset ();
if (argc == 0)
{
grub_error (GRUB_ERR_BAD_ARGUMENT, "no kernel specified");
goto fail;
}
file = grub_gzfile_open (argv[0], 1);
if (! file)
{
grub_error (GRUB_ERR_BAD_ARGUMENT, "couldn't open file");
goto fail;
}
buffer = grub_malloc (MULTIBOOT2_HEADER_SEARCH);
if (! buffer)
return;
len = grub_file_read (file, buffer, MULTIBOOT2_HEADER_SEARCH);
if (len < 32)
{
grub_error (GRUB_ERR_BAD_OS, "file too small");
goto fail;
}
/* Look for the multiboot header in the buffer. The header should
be at least 8 bytes and aligned on a 8-byte boundary. */
for (p = buffer; p <= buffer + len - 8; p += 8)
{
header = (struct multiboot2_header *) p;
if (header->magic == MULTIBOOT2_HEADER_MAGIC)
{
header_found = 1;
break;
}
}
if (! header_found)
grub_dprintf ("loader", "No multiboot 2 header found.\n");
/* Create the basic tags. */
grub_dprintf ("loader", "Creating multiboot 2 tags\n");
grub_mb2_tags_create ();
/* Load the kernel and create its tag. */
elf = grub_elf_file (file);
if (elf)
{
grub_dprintf ("loader", "Loading ELF multiboot 2 file.\n");
err = grub_mb2_load_elf (elf, argc-1, &argv[1]);
grub_elf_close (elf);
}
else
{
grub_errno = 0;
grub_dprintf ("loader", "Loading non-ELF multiboot 2 file.\n");
if (header)
err = grub_mb2_load_other (file, header);
else
err = grub_error (GRUB_ERR_BAD_OS,
"need multiboot 2 header to load non-ELF files");
grub_file_close (file);
}
grub_free (buffer);
if (err)
goto fail;
/* Good to go. */
grub_loader_set (grub_mb2_boot, grub_mb2_unload, 1);
return;
fail:
grub_mb2_tags_free ();
grub_dl_unref (my_mod);
}
void
grub_module2 (int argc, char *argv[])
{
grub_file_t file;
grub_addr_t modaddr = 0;
grub_ssize_t modsize = 0;
grub_err_t err;
if (argc == 0)
{
grub_error (GRUB_ERR_BAD_ARGUMENT, "no module specified");
return;
}
if (argc == 1)
{
grub_error (GRUB_ERR_BAD_ARGUMENT, "no module type specified");
return;
}
if (entry == 0)
{
grub_error (GRUB_ERR_BAD_ARGUMENT,
"you need to load the multiboot kernel first");
return;
}
/* Load module data. */
file = grub_gzfile_open (argv[0], 1);
if (! file)
goto out;
modsize = grub_file_size (file);
err = grub_mb2_arch_module_alloc (modsize, &modaddr);
if (err)
goto out;
grub_dprintf ("loader", "Loading module at 0x%x - 0x%x\n", modaddr,
modaddr + modsize);
if (grub_file_read (file, (void *) modaddr, modsize) != modsize)
{
grub_error (GRUB_ERR_FILE_READ_ERROR, "couldn't read file");
goto out;
}
/* Create the module tag. */
err = grub_mb2_tag_module_create (modaddr, modsize,
argv[1], MULTIBOOT2_TAG_MODULE,
argc-2, &argv[2]);
if (err)
goto out;
out:
grub_error_push ();
if (file)
grub_file_close (file);
if (modaddr)
grub_mb2_arch_module_free (modaddr, modsize);
grub_error_pop ();
}

79
loader/multiboot_loader.c
View file

@ -1,7 +1,7 @@
/* multiboot_loader.c - boot multiboot 1 or 2 OS image */
/* multiboot_loader.c - boot multiboot kernel image */
/*
* GRUB -- GRand Unified Bootloader
* Copyright (C) 2007,2008,2009 Free Software Foundation, Inc.
* Copyright (C) 2007,2008,2009,2010 Free Software Foundation, Inc.
*
* GRUB is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
@ -18,8 +18,6 @@
*/
#include <grub/multiboot.h>
#include <grub/multiboot2.h>
#include <multiboot2.h>
#include <grub/elf.h>
#include <grub/file.h>
#include <grub/err.h>
@ -31,15 +29,6 @@
grub_dl_t my_mod;
/* This tracks which version of multiboot to use when using
* the module command. By default use multiboot version 1.
* values:
* 1 - Multiboot version 1
* 2 - Multiboot version 2
*/
static unsigned int module_version_status = 1;
static int
find_multi_boot1_header (grub_file_t file)
{
@ -69,34 +58,6 @@ find_multi_boot1_header (grub_file_t file)
return found_status;
}
static int
find_multi_boot2_header (grub_file_t file)
{
struct multiboot_header *header;
char buffer[MULTIBOOT_SEARCH];
int found_status = 0;
grub_ssize_t len;
len = grub_file_read (file, buffer, MULTIBOOT_SEARCH);
if (len < 32)
return found_status;
/* Look for the multiboot header in the buffer. The header should
be at least 8 bytes and aligned on a 8-byte boundary. */
for (header = (struct multiboot_header *) buffer;
((char *) header <= buffer + len - 8) || (header = 0);
header = (struct multiboot_header *) ((char *) header + 8))
{
if (header->magic == MULTIBOOT2_HEADER_MAGIC)
{
found_status = 1;
break;
}
}
return found_status;
}
static grub_err_t
grub_cmd_multiboot_loader (grub_command_t cmd __attribute__ ((unused)),
int argc, char *argv[])
@ -122,8 +83,6 @@ grub_cmd_multiboot_loader (grub_command_t cmd __attribute__ ((unused)),
/* find which header is in the file */
if (find_multi_boot1_header (file))
header_multi_ver_found = 1;
else if (find_multi_boot2_header (file))
header_multi_ver_found = 2;
else
{
grub_error (GRUB_ERR_BAD_OS, "multiboot header not found");
@ -136,25 +95,9 @@ grub_cmd_multiboot_loader (grub_command_t cmd __attribute__ ((unused)),
/* Launch multi boot with header */
/* XXX Find a better way to identify this.
This is for i386-pc */
#if defined(GRUB_MACHINE_PCBIOS) || defined(GRUB_MACHINE_COREBOOT) || \
defined(GRUB_MACHINE_QEMU)
if (header_multi_ver_found == 1)
{
grub_dprintf ("multiboot_loader",
"Launching multiboot 1 grub_multiboot() function\n");
grub_multiboot (argc, argv);
module_version_status = 1;
}
#endif
if (header_multi_ver_found == 0 || header_multi_ver_found == 2)
{
grub_dprintf ("multiboot_loader",
"Launching multiboot 2 grub_multiboot2() function\n");
grub_multiboot2 (argc, argv);
module_version_status = 2;
}
return grub_errno;
@ -172,21 +115,9 @@ grub_cmd_module_loader (grub_command_t cmd __attribute__ ((unused)),
int argc, char *argv[])
{
#if defined(GRUB_MACHINE_PCBIOS) || defined(GRUB_MACHINE_COREBOOT) || \
defined(GRUB_MACHINE_QEMU)
if (module_version_status == 1)
{
grub_dprintf("multiboot_loader",
"Launching multiboot 1 grub_module() function\n");
grub_module (argc, argv);
}
#endif
if (module_version_status == 2)
{
grub_dprintf("multiboot_loader",
"Launching multiboot 2 grub_module2() function\n");
grub_module2 (argc, argv);
}
return grub_errno;
}
@ -196,8 +127,14 @@ static grub_command_t cmd_multiboot, cmd_module;
GRUB_MOD_INIT(multiboot)
{
cmd_multiboot =
#ifdef GRUB_USE_MULTIBOOT2
grub_register_command ("multiboot2", grub_cmd_multiboot_loader,
0, "Load a multiboot 2 kernel.");
#else
grub_register_command ("multiboot", grub_cmd_multiboot_loader,
0, "Load a multiboot kernel.");
#endif
cmd_module =
grub_register_command ("module", grub_cmd_module_loader,
0, "Load a multiboot module.");