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This commit is contained in:
Vladimir 'phcoder' Serbinenko 2010-04-03 14:29:11 +02:00
parent 8c46a785e3
commit a9cd257a87
5 changed files with 4 additions and 6 deletions
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354
loader/i386/multiboot.c
View file

@ -1,354 +0,0 @@
/* multiboot.c - boot a multiboot OS image. */
/*
* GRUB -- GRand Unified Bootloader
* Copyright (C) 1999,2000,2001,2002,2003,2004,2005,2007,2008,2009,2010 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.
*
* 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/>.
*/
/*
* FIXME: The following features from the Multiboot specification still
* need to be implemented:
* - VBE support
* - symbol table
* - drives table
* - ROM configuration table
* - APM table
*/
#include <grub/loader.h>
#include <grub/command.h>
#include <grub/machine/loader.h>
#include <grub/multiboot.h>
#include <grub/cpu/multiboot.h>
#include <grub/elf.h>
#include <grub/aout.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>
#include <grub/env.h>
#include <grub/cpu/relocator.h>
#include <grub/video.h>
#include <grub/memory.h>
#include <grub/i18n.h>
#ifdef GRUB_MACHINE_EFI
#include <grub/efi/efi.h>
#endif
#if defined (GRUB_MACHINE_PCBIOS) || defined (GRUB_MACHINE_COREBOOT) || defined (GRUB_MACHINE_QEMU)
#define DEFAULT_VIDEO_MODE "text"
#else
#define DEFAULT_VIDEO_MODE "auto"
#endif
grub_size_t grub_multiboot_alloc_mbi;
char *grub_multiboot_payload_orig;
grub_addr_t grub_multiboot_payload_dest;
grub_size_t grub_multiboot_pure_size;
grub_uint32_t grub_multiboot_payload_eip;
static int accepts_video;
static int accepts_ega_text;
static int console_required;
static grub_dl_t my_mod;
/* Return the length of the Multiboot mmap that will be needed to allocate
our platform's map. */
grub_uint32_t
grub_get_multiboot_mmap_count (void)
{
grub_size_t count = 0;
auto int NESTED_FUNC_ATTR hook (grub_uint64_t, grub_uint64_t, grub_uint32_t);
int NESTED_FUNC_ATTR hook (grub_uint64_t addr __attribute__ ((unused)),
grub_uint64_t size __attribute__ ((unused)),
grub_uint32_t type __attribute__ ((unused)))
{
count++;
return 0;
}
grub_mmap_iterate (hook);
return count;
}
grub_err_t
grub_multiboot_set_video_mode (void)
{
grub_err_t err;
const char *modevar;
if (accepts_video || !GRUB_MACHINE_HAS_VGA_TEXT)
{
modevar = grub_env_get ("gfxpayload");
if (! modevar || *modevar == 0)
err = grub_video_set_mode (DEFAULT_VIDEO_MODE, 0, 0);
else
{
char *tmp;
tmp = grub_xasprintf ("%s;" DEFAULT_VIDEO_MODE, modevar);
if (! tmp)
return grub_errno;
err = grub_video_set_mode (tmp, 0, 0);
grub_free (tmp);
}
}
else
err = grub_video_set_mode ("text", 0, 0);
return err;
}
static grub_err_t
grub_multiboot_boot (void)
{
grub_size_t mbi_size;
grub_err_t err;
struct grub_relocator32_state state = MULTIBOOT_INITIAL_STATE;
state.MULTIBOOT_ENTRY_REGISTER = grub_multiboot_payload_eip;
mbi_size = grub_multiboot_get_mbi_size ();
if (grub_multiboot_alloc_mbi < mbi_size)
{
grub_multiboot_payload_orig
= grub_relocator32_realloc (grub_multiboot_payload_orig,
grub_multiboot_pure_size + mbi_size);
if (!grub_multiboot_payload_orig)
return grub_errno;
grub_multiboot_alloc_mbi = mbi_size;
}
state.MULTIBOOT_MBI_REGISTER = grub_multiboot_payload_dest
+ grub_multiboot_pure_size;
err = grub_multiboot_make_mbi (grub_multiboot_payload_orig,
grub_multiboot_payload_dest,
grub_multiboot_pure_size, mbi_size);
if (err)
return err;
#ifdef GRUB_MACHINE_EFI
if (! grub_efi_finish_boot_services ())
grub_fatal ("cannot exit boot services");
#endif
grub_relocator32_boot (grub_multiboot_payload_orig,
grub_multiboot_payload_dest,
state);
/* Not reached. */
return GRUB_ERR_NONE;
}
static grub_err_t
grub_multiboot_unload (void)
{
grub_multiboot_free_mbi ();
grub_relocator32_free (grub_multiboot_payload_orig);
grub_multiboot_alloc_mbi = 0;
grub_multiboot_payload_orig = NULL;
grub_dl_unref (my_mod);
return GRUB_ERR_NONE;
}
#define MULTIBOOT_LOAD_ELF64
#include "multiboot_elfxx.c"
#undef MULTIBOOT_LOAD_ELF64
#define MULTIBOOT_LOAD_ELF32
#include "multiboot_elfxx.c"
#undef MULTIBOOT_LOAD_ELF32
/* Load ELF32 or ELF64. */
grub_err_t
grub_multiboot_load_elf (grub_file_t file, void *buffer)
{
if (grub_multiboot_is_elf32 (buffer))
return grub_multiboot_load_elf32 (file, buffer);
else if (grub_multiboot_is_elf64 (buffer))
return grub_multiboot_load_elf64 (file, buffer);
return grub_error (GRUB_ERR_UNKNOWN_OS, "unknown ELF class");
}
grub_err_t
grub_multiboot_set_console (int console_type, int accepted_consoles,
int width, int height, int depth,
int console_req)
{
console_required = console_req;
if (!(accepted_consoles
& (GRUB_MULTIBOOT_CONSOLE_FRAMEBUFFER
| (GRUB_MACHINE_HAS_VGA_TEXT ? GRUB_MULTIBOOT_CONSOLE_EGA_TEXT : 0))))
{
if (console_required)
return grub_error (GRUB_ERR_BAD_OS,
"OS requires a console but none is available");
grub_printf ("WARNING: no console will be available to OS");
accepts_video = 0;
accepts_ega_text = 0;
return GRUB_ERR_NONE;
}
if (console_type == GRUB_MULTIBOOT_CONSOLE_FRAMEBUFFER)
{
char *buf;
if (depth && width && height)
buf = grub_xasprintf ("%dx%dx%d,%dx%d,auto", width,
height, depth, width, height);
else if (width && height)
buf = grub_xasprintf ("%dx%d,auto", width, height);
else
buf = grub_strdup ("auto");
if (!buf)
return grub_errno;
grub_env_set ("gfxpayload", buf);
grub_free (buf);
}
else
grub_env_set ("gfxpayload", "text");
accepts_video = !!(accepted_consoles & GRUB_MULTIBOOT_CONSOLE_FRAMEBUFFER);
accepts_ega_text = !!(accepted_consoles & GRUB_MULTIBOOT_CONSOLE_EGA_TEXT);
return GRUB_ERR_NONE;
}
static grub_err_t
grub_cmd_multiboot (grub_command_t cmd __attribute__ ((unused)),
int argc, char *argv[])
{
grub_file_t file = 0;
grub_err_t err;
grub_loader_unset ();
if (argc == 0)
return grub_error (GRUB_ERR_BAD_ARGUMENT, "no kernel specified");
file = grub_gzfile_open (argv[0], 1);
if (! file)
return grub_error (GRUB_ERR_BAD_ARGUMENT, "couldn't open file");
grub_dl_ref (my_mod);
/* Skip filename. */
grub_multiboot_init_mbi (argc - 1, argv + 1);
grub_relocator32_free (grub_multiboot_payload_orig);
grub_multiboot_payload_orig = NULL;
err = grub_multiboot_load (file);
if (err)
goto fail;
grub_multiboot_set_bootdev ();
grub_loader_set (grub_multiboot_boot, grub_multiboot_unload, 0);
fail:
if (file)
grub_file_close (file);
if (grub_errno != GRUB_ERR_NONE)
{
grub_relocator32_free (grub_multiboot_payload_orig);
grub_multiboot_free_mbi ();
grub_dl_unref (my_mod);
}
return grub_errno;
}
static grub_err_t
grub_cmd_module (grub_command_t cmd __attribute__ ((unused)),
int argc, char *argv[])
{
grub_file_t file = 0;
grub_ssize_t size;
char *module = 0;
grub_err_t err;
if (argc == 0)
return grub_error (GRUB_ERR_BAD_ARGUMENT, "no module specified");
if (!grub_multiboot_payload_orig)
return grub_error (GRUB_ERR_BAD_ARGUMENT,
"you need to load the multiboot kernel first");
file = grub_gzfile_open (argv[0], 1);
if (! file)
return grub_errno;
size = grub_file_size (file);
module = grub_memalign (MULTIBOOT_MOD_ALIGN, size);
if (! module)
{
grub_file_close (file);
return grub_errno;
}
err = grub_multiboot_add_module ((grub_addr_t) module, size,
argc - 1, argv + 1);
if (err)
{
grub_file_close (file);
return err;
}
if (grub_file_read (file, module, size) != size)
{
grub_file_close (file);
return grub_error (GRUB_ERR_FILE_READ_ERROR, "couldn't read file");
}
grub_file_close (file);
return GRUB_ERR_NONE;;
}
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,
0, N_("Load a multiboot 2 kernel."));
#else
grub_register_command ("multiboot", grub_cmd_multiboot,
0, N_("Load a multiboot kernel."));
#endif
cmd_module =
grub_register_command ("module", grub_cmd_module,
0, N_("Load a multiboot module."));
my_mod = mod;
}
GRUB_MOD_FINI(multiboot)
{
grub_unregister_command (cmd_multiboot);
grub_unregister_command (cmd_module);
}

160
loader/i386/multiboot_elfxx.c
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@ -1,160 +0,0 @@
/*
* GRUB -- GRand Unified Bootloader
* Copyright (C) 1999,2000,2001,2002,2003,2004,2005,2007,2008,2009 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/>.
*/
#if defined(MULTIBOOT_LOAD_ELF32)
# define XX 32
# define E_MACHINE MULTIBOOT_ELF32_MACHINE
# define ELFCLASSXX ELFCLASS32
# define Elf_Ehdr Elf32_Ehdr
# define Elf_Phdr Elf32_Phdr
#elif defined(MULTIBOOT_LOAD_ELF64)
# define XX 64
# define E_MACHINE MULTIBOOT_ELF64_MACHINE
# define ELFCLASSXX ELFCLASS64
# define Elf_Ehdr Elf64_Ehdr
# define Elf_Phdr Elf64_Phdr
#else
#error "I'm confused"
#endif
#include <grub/i386/relocator.h>
#define CONCAT(a,b) CONCAT_(a, b)
#define CONCAT_(a,b) a ## b
/* Check if BUFFER contains ELF32 (or ELF64). */
static int
CONCAT(grub_multiboot_is_elf, XX) (void *buffer)
{
Elf_Ehdr *ehdr = (Elf_Ehdr *) buffer;
return ehdr->e_ident[EI_CLASS] == ELFCLASSXX;
}
static grub_err_t
CONCAT(grub_multiboot_load_elf, XX) (grub_file_t file, void *buffer)
{
Elf_Ehdr *ehdr = (Elf_Ehdr *) buffer;
char *phdr_base;
int lowest_segment = -1, highest_segment = -1;
int i;
grub_size_t code_size;
if (ehdr->e_ident[EI_CLASS] != ELFCLASSXX)
return grub_error (GRUB_ERR_UNKNOWN_OS, "invalid ELF class");
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_version != EV_CURRENT
|| ehdr->e_ident[EI_DATA] != ELFDATA2LSB
|| ehdr->e_machine != E_MACHINE)
return grub_error(GRUB_ERR_UNKNOWN_OS, "no valid ELF header found");
if (ehdr->e_type != ET_EXEC && ehdr->e_type != ET_DYN)
return grub_error (GRUB_ERR_UNKNOWN_OS, "invalid ELF file type");
/* FIXME: Should we support program headers at strange locations? */
if (ehdr->e_phoff + ehdr->e_phnum * ehdr->e_phentsize > MULTIBOOT_SEARCH)
return grub_error (GRUB_ERR_BAD_OS, "program header at a too high offset");
#ifdef MULTIBOOT_LOAD_ELF64
/* We still in 32-bit mode. */
if (ehdr->e_entry > 0xffffffff)
return grub_error (GRUB_ERR_BAD_OS, "invalid entry point for ELF64");
#endif
phdr_base = (char *) buffer + ehdr->e_phoff;
#define phdr(i) ((Elf_Phdr *) (phdr_base + (i) * ehdr->e_phentsize))
for (i = 0; i < ehdr->e_phnum; i++)
if (phdr(i)->p_type == PT_LOAD && phdr(i)->p_filesz != 0)
{
/* Beware that segment 0 isn't necessarily loadable */
if (lowest_segment == -1
|| phdr(i)->p_paddr < phdr(lowest_segment)->p_paddr)
lowest_segment = i;
if (highest_segment == -1
|| phdr(i)->p_paddr > phdr(highest_segment)->p_paddr)
highest_segment = i;
}
if (lowest_segment == -1)
return grub_error (GRUB_ERR_BAD_OS, "ELF contains no loadable segments");
code_size = (phdr(highest_segment)->p_paddr + phdr(highest_segment)->p_memsz) - phdr(lowest_segment)->p_paddr;
grub_multiboot_payload_dest = phdr(lowest_segment)->p_paddr;
grub_multiboot_pure_size += code_size;
grub_multiboot_alloc_mbi = grub_multiboot_get_mbi_size () + 65536;
grub_multiboot_payload_orig
= grub_relocator32_alloc (grub_multiboot_pure_size + grub_multiboot_alloc_mbi);
if (!grub_multiboot_payload_orig)
return grub_errno;
/* Load every loadable segment in memory. */
for (i = 0; i < ehdr->e_phnum; i++)
{
if (phdr(i)->p_type == PT_LOAD && phdr(i)->p_filesz != 0)
{
char *load_this_module_at = (char *) (grub_multiboot_payload_orig + (long) (phdr(i)->p_paddr - phdr(lowest_segment)->p_paddr));
grub_dprintf ("multiboot_loader", "segment %d: paddr=0x%lx, memsz=0x%lx, vaddr=0x%lx\n",
i, (long) phdr(i)->p_paddr, (long) phdr(i)->p_memsz, (long) phdr(i)->p_vaddr);
if (grub_file_seek (file, (grub_off_t) phdr(i)->p_offset)
== (grub_off_t) -1)
return grub_error (GRUB_ERR_BAD_OS,
"invalid offset in program header");
if (grub_file_read (file, load_this_module_at, phdr(i)->p_filesz)
!= (grub_ssize_t) phdr(i)->p_filesz)
return grub_error (GRUB_ERR_BAD_OS,
"couldn't read segment from file");
if (phdr(i)->p_filesz < phdr(i)->p_memsz)
grub_memset (load_this_module_at + phdr(i)->p_filesz, 0,
phdr(i)->p_memsz - phdr(i)->p_filesz);
}
}
for (i = 0; i < ehdr->e_phnum; i++)
if (phdr(i)->p_vaddr <= ehdr->e_entry
&& phdr(i)->p_vaddr + phdr(i)->p_memsz > ehdr->e_entry)
{
grub_multiboot_payload_eip = grub_multiboot_payload_dest
+ (ehdr->e_entry - phdr(i)->p_vaddr) + (phdr(i)->p_paddr - phdr(lowest_segment)->p_paddr);
break;
}
if (i == ehdr->e_phnum)
return grub_error (GRUB_ERR_BAD_OS, "entry point isn't in a segment");
#undef phdr
return grub_errno;
}
#undef XX
#undef E_MACHINE
#undef ELFCLASSXX
#undef Elf_Ehdr
#undef Elf_Phdr

701
loader/i386/multiboot_mbi2.c
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@ -1,701 +0,0 @@
/*
* GRUB -- GRand Unified Bootloader
* Copyright (C) 1999,2000,2001,2002,2003,2004,2005,2007,2008,2009 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/machine/memory.h>
#include <grub/memory.h>
#ifdef GRUB_MACHINE_PCBIOS
#include <grub/machine/biosnum.h>
#endif
#include <grub/multiboot.h>
#include <grub/cpu/multiboot.h>
#include <grub/cpu/relocator.h>
#include <grub/disk.h>
#include <grub/device.h>
#include <grub/partition.h>
#include <grub/mm.h>
#include <grub/misc.h>
#include <grub/env.h>
#include <grub/video.h>
#if defined (GRUB_MACHINE_PCBIOS) || defined (GRUB_MACHINE_COREBOOT) || defined (GRUB_MACHINE_QEMU)
#include <grub/i386/pc/vbe.h>
#define HAS_VGA_TEXT 1
#else
#define HAS_VGA_TEXT 0
#endif
struct module
{
struct module *next;
grub_addr_t start;
grub_size_t size;
char *cmdline;
int cmdline_size;
};
struct module *modules, *modules_last;
static grub_size_t cmdline_size;
static grub_size_t total_modcmd;
static unsigned modcnt;
static char *cmdline = NULL;
static int bootdev_set;
static grub_uint32_t biosdev, slice, part;
grub_err_t
grub_multiboot_load (grub_file_t file)
{
char *buffer;
grub_ssize_t len;
struct multiboot_header *header;
grub_err_t err;
struct multiboot_header_tag *tag;
struct multiboot_header_tag_address *addr_tag = NULL;
int entry_specified = 0;
grub_addr_t entry = 0;
grub_uint32_t console_required = 0;
struct multiboot_header_tag_framebuffer *fbtag = NULL;
int accepted_consoles = GRUB_MULTIBOOT_CONSOLE_EGA_TEXT;
buffer = grub_malloc (MULTIBOOT_SEARCH);
if (!buffer)
return grub_errno;
len = grub_file_read (file, buffer, MULTIBOOT_SEARCH);
if (len < 32)
{
grub_free (buffer);
return grub_error (GRUB_ERR_BAD_OS, "file too small");
}
/* 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 multiboot_header *) buffer;
((char *) header <= buffer + len - 12) || (header = 0);
header = (struct multiboot_header *) ((char *) header + MULTIBOOT_HEADER_ALIGN))
{
if (header->magic == MULTIBOOT_HEADER_MAGIC
&& !(header->magic + header->architecture
+ header->header_length + header->checksum)
&& header->architecture == MULTIBOOT_ARCHITECTURE_CURRENT)
break;
}
if (header == 0)
{
grub_free (buffer);
return grub_error (GRUB_ERR_BAD_ARGUMENT, "no multiboot header found");
}
for (tag = (struct multiboot_header_tag *) (header + 1);
tag->type != MULTIBOOT_TAG_TYPE_END;
tag = (struct multiboot_header_tag *) ((char *) tag + tag->size))
switch (tag->type)
{
case MULTIBOOT_HEADER_TAG_INFORMATION_REQUEST:
{
unsigned i;
struct multiboot_header_tag_information_request *request_tag
= (struct multiboot_header_tag_information_request *) tag;
if (request_tag->flags & MULTIBOOT_HEADER_TAG_OPTIONAL)
break;
for (i = 0; i < (request_tag->size - sizeof (request_tag))
/ sizeof (request_tag->requests[0]); i++)
switch (request_tag->requests[i])
{
case MULTIBOOT_TAG_TYPE_END:
case MULTIBOOT_TAG_TYPE_CMDLINE:
case MULTIBOOT_TAG_TYPE_BOOT_LOADER_NAME:
case MULTIBOOT_TAG_TYPE_MODULE:
case MULTIBOOT_TAG_TYPE_BASIC_MEMINFO:
case MULTIBOOT_TAG_TYPE_BOOTDEV:
case MULTIBOOT_TAG_TYPE_MMAP:
case MULTIBOOT_TAG_TYPE_FRAMEBUFFER:
break;
case MULTIBOOT_TAG_TYPE_VBE:
case MULTIBOOT_TAG_TYPE_ELF_SECTIONS:
case MULTIBOOT_TAG_TYPE_APM:
default:
grub_free (buffer);
return grub_error (GRUB_ERR_UNKNOWN_OS,
"unsupported information tag: 0x%x",
request_tag->requests[i]);
}
break;
}
case MULTIBOOT_HEADER_TAG_ADDRESS:
addr_tag = (struct multiboot_header_tag_address *) tag;
break;
case MULTIBOOT_HEADER_TAG_ENTRY_ADDRESS:
entry_specified = 1;
entry = ((struct multiboot_header_tag_entry_address *) tag)->entry_addr;
break;
case MULTIBOOT_HEADER_TAG_CONSOLE_FLAGS:
if (!(((struct multiboot_header_tag_console_flags *) tag)->console_flags
& MULTIBOOT_CONSOLE_FLAGS_EGA_TEXT_SUPPORTED))
accepted_consoles &= ~GRUB_MULTIBOOT_CONSOLE_EGA_TEXT;
if (((struct multiboot_header_tag_console_flags *) tag)->console_flags
& MULTIBOOT_CONSOLE_FLAGS_CONSOLE_REQUIRED)
console_required = 1;
break;
case MULTIBOOT_HEADER_TAG_FRAMEBUFFER:
fbtag = (struct multiboot_header_tag_framebuffer *) tag;
accepted_consoles |= GRUB_MULTIBOOT_CONSOLE_FRAMEBUFFER;
break;
/* GRUB always page-aligns modules. */
case MULTIBOOT_HEADER_TAG_MODULE_ALIGN:
break;
default:
if (! (tag->flags & MULTIBOOT_HEADER_TAG_OPTIONAL))
{
grub_free (buffer);
return grub_error (GRUB_ERR_UNKNOWN_OS,
"unsupported tag: 0x%x", tag->type);
}
break;
}
if (addr_tag && !entry_specified)
{
grub_free (buffer);
return grub_error (GRUB_ERR_UNKNOWN_OS,
"load address tag without entry address tag");
}
if (addr_tag)
{
int offset = ((char *) header - buffer -
(addr_tag->header_addr - addr_tag->load_addr));
int load_size = ((addr_tag->load_end_addr == 0) ? file->size - offset :
addr_tag->load_end_addr - addr_tag->load_addr);
grub_size_t code_size;
if (addr_tag->bss_end_addr)
code_size = (addr_tag->bss_end_addr - addr_tag->load_addr);
else
code_size = load_size;
grub_multiboot_payload_dest = addr_tag->load_addr;
grub_multiboot_pure_size += code_size;
/* Allocate a bit more to avoid relocations in most cases. */
grub_multiboot_alloc_mbi = grub_multiboot_get_mbi_size () + 65536;
grub_multiboot_payload_orig
= grub_relocator32_alloc (grub_multiboot_pure_size + grub_multiboot_alloc_mbi);
if (! grub_multiboot_payload_orig)
{
grub_free (buffer);
return grub_errno;
}
if ((grub_file_seek (file, offset)) == (grub_off_t) -1)
{
grub_free (buffer);
return grub_errno;
}
grub_file_read (file, (void *) grub_multiboot_payload_orig, load_size);
if (grub_errno)
{
grub_free (buffer);
return grub_errno;
}
if (addr_tag->bss_end_addr)
grub_memset ((void *) (grub_multiboot_payload_orig + load_size), 0,
addr_tag->bss_end_addr - addr_tag->load_addr - load_size);
}
else
{
err = grub_multiboot_load_elf (file, buffer);
if (err)
{
grub_free (buffer);
return err;
}
}
if (entry_specified)
grub_multiboot_payload_eip = entry;
if (fbtag)
err = grub_multiboot_set_console (GRUB_MULTIBOOT_CONSOLE_FRAMEBUFFER,
accepted_consoles,
fbtag->width, fbtag->height,
fbtag->depth, console_required);
else
err = grub_multiboot_set_console (GRUB_MULTIBOOT_CONSOLE_EGA_TEXT,
accepted_consoles,
0, 0, 0, console_required);
return err;
}
grub_size_t
grub_multiboot_get_mbi_size (void)
{
return 2 * sizeof (grub_uint32_t) + sizeof (struct multiboot_tag)
+ (sizeof (struct multiboot_tag_string)
+ ALIGN_UP (cmdline_size, MULTIBOOT_TAG_ALIGN))
+ (sizeof (struct multiboot_tag_string)
+ ALIGN_UP (sizeof (PACKAGE_STRING), MULTIBOOT_TAG_ALIGN))
+ (modcnt * sizeof (struct multiboot_tag_module) + total_modcmd)
+ sizeof (struct multiboot_tag_basic_meminfo)
+ ALIGN_UP (sizeof (struct multiboot_tag_bootdev), MULTIBOOT_TAG_ALIGN)
+ (sizeof (struct multiboot_tag_mmap) + grub_get_multiboot_mmap_count ()
* sizeof (struct multiboot_mmap_entry))
+ sizeof (struct multiboot_tag_vbe) + MULTIBOOT_TAG_ALIGN - 1;
}
/* Fill previously allocated Multiboot mmap. */
static void
grub_fill_multiboot_mmap (struct multiboot_tag_mmap *tag)
{
struct multiboot_mmap_entry *mmap_entry = tag->entries;
auto int NESTED_FUNC_ATTR hook (grub_uint64_t, grub_uint64_t, grub_uint32_t);
int NESTED_FUNC_ATTR hook (grub_uint64_t addr, grub_uint64_t size, grub_uint32_t type)
{
mmap_entry->addr = addr;
mmap_entry->len = size;
switch (type)
{
case GRUB_MACHINE_MEMORY_AVAILABLE:
mmap_entry->type = MULTIBOOT_MEMORY_AVAILABLE;
break;
#ifdef GRUB_MACHINE_MEMORY_ACPI_RECLAIMABLE
case GRUB_MACHINE_MEMORY_ACPI_RECLAIMABLE:
mmap_entry->type = MULTIBOOT_MEMORY_ACPI_RECLAIMABLE;
break;
#endif
#ifdef GRUB_MACHINE_MEMORY_NVS
case GRUB_MACHINE_MEMORY_NVS:
mmap_entry->type = MULTIBOOT_MEMORY_NVS;
break;
#endif
default:
mmap_entry->type = MULTIBOOT_MEMORY_RESERVED;
break;
}
mmap_entry++;
return 0;
}
tag->type = MULTIBOOT_TAG_TYPE_MMAP;
tag->size = sizeof (struct multiboot_tag_mmap)
+ sizeof (struct multiboot_mmap_entry) * grub_get_multiboot_mmap_count ();
tag->entry_size = sizeof (struct multiboot_mmap_entry);
tag->entry_version = 0;
grub_mmap_iterate (hook);
}
static grub_err_t
retrieve_video_parameters (grub_uint8_t **ptrorig)
{
grub_err_t err;
struct grub_video_mode_info mode_info;
void *framebuffer;
grub_video_driver_id_t driv_id;
struct grub_video_palette_data palette[256];
struct multiboot_tag_framebuffer *tag
= (struct multiboot_tag_framebuffer *) *ptrorig;
err = grub_multiboot_set_video_mode ();
if (err)
{
grub_print_error ();
grub_errno = GRUB_ERR_NONE;
}
grub_video_get_palette (0, ARRAY_SIZE (palette), palette);
driv_id = grub_video_get_driver_id ();
#if HAS_VGA_TEXT
if (driv_id == GRUB_VIDEO_DRIVER_NONE)
{
struct grub_vbe_mode_info_block vbe_mode_info;
grub_uint32_t vbe_mode;
#if defined (GRUB_MACHINE_PCBIOS)
{
grub_vbe_status_t status;
void *scratch = (void *) GRUB_MEMORY_MACHINE_SCRATCH_ADDR;
status = grub_vbe_bios_get_mode (scratch);
vbe_mode = *(grub_uint32_t *) scratch;
if (status != GRUB_VBE_STATUS_OK)
return GRUB_ERR_NONE;
}
#else
vbe_mode = 3;
#endif
/* get_mode_info isn't available for mode 3. */
if (vbe_mode == 3)
{
grub_memset (&vbe_mode_info, 0,
sizeof (struct grub_vbe_mode_info_block));
vbe_mode_info.memory_model = GRUB_VBE_MEMORY_MODEL_TEXT;
vbe_mode_info.x_resolution = 80;
vbe_mode_info.y_resolution = 25;
}
#if defined (GRUB_MACHINE_PCBIOS)
else
{
grub_vbe_status_t status;
void *scratch = (void *) GRUB_MEMORY_MACHINE_SCRATCH_ADDR;
status = grub_vbe_bios_get_mode_info (vbe_mode, scratch);
if (status != GRUB_VBE_STATUS_OK)
return GRUB_ERR_NONE;
grub_memcpy (&vbe_mode_info, scratch,
sizeof (struct grub_vbe_mode_info_block));
}
#endif
if (vbe_mode_info.memory_model == GRUB_VBE_MEMORY_MODEL_TEXT)
{
tag = (struct multiboot_tag_framebuffer *) *ptrorig;
tag->common.type = MULTIBOOT_TAG_TYPE_FRAMEBUFFER;
tag->common.size = 0;
tag->common.framebuffer_addr = 0xb8000;
tag->common.framebuffer_pitch = 2 * vbe_mode_info.x_resolution;
tag->common.framebuffer_width = vbe_mode_info.x_resolution;
tag->common.framebuffer_height = vbe_mode_info.y_resolution;
tag->common.framebuffer_bpp = 16;
tag->common.framebuffer_type = MULTIBOOT_FRAMEBUFFER_TYPE_EGA_TEXT;
tag->common.size = sizeof (tag->common);
tag->common.reserved = 0;
*ptrorig += ALIGN_UP (tag->common.size, MULTIBOOT_TAG_ALIGN);
}
return GRUB_ERR_NONE;
}
#else
if (driv_id == GRUB_VIDEO_DRIVER_NONE)
return GRUB_ERR_NONE;
#endif
err = grub_video_get_info_and_fini (&mode_info, &framebuffer);
if (err)
return err;
tag = (struct multiboot_tag_framebuffer *) *ptrorig;
tag->common.type = MULTIBOOT_TAG_TYPE_FRAMEBUFFER;
tag->common.size = 0;
tag->common.framebuffer_addr = (grub_addr_t) framebuffer;
tag->common.framebuffer_pitch = mode_info.pitch;
tag->common.framebuffer_width = mode_info.width;
tag->common.framebuffer_height = mode_info.height;
tag->common.framebuffer_bpp = mode_info.bpp;
tag->common.reserved = 0;
if (mode_info.mode_type & GRUB_VIDEO_MODE_TYPE_INDEX_COLOR)
{
unsigned i;
tag->common.framebuffer_type = MULTIBOOT_FRAMEBUFFER_TYPE_INDEXED;
tag->framebuffer_palette_num_colors = mode_info.number_of_colors;
if (tag->framebuffer_palette_num_colors > ARRAY_SIZE (palette))
tag->framebuffer_palette_num_colors = ARRAY_SIZE (palette);
tag->common.size = sizeof (struct multiboot_tag_framebuffer_common)
+ sizeof (multiboot_uint16_t) + tag->framebuffer_palette_num_colors
* sizeof (struct multiboot_color);
for (i = 0; i < tag->framebuffer_palette_num_colors; i++)
{
tag->framebuffer_palette[i].red = palette[i].r;
tag->framebuffer_palette[i].green = palette[i].g;
tag->framebuffer_palette[i].blue = palette[i].b;
}
}
else
{
tag->common.framebuffer_type = MULTIBOOT_FRAMEBUFFER_TYPE_RGB;
tag->common.framebuffer_type = MULTIBOOT_FRAMEBUFFER_TYPE_RGB;
tag->framebuffer_red_field_position = mode_info.green_field_pos;
tag->framebuffer_red_mask_size = mode_info.green_mask_size;
tag->framebuffer_green_field_position = mode_info.green_field_pos;
tag->framebuffer_green_mask_size = mode_info.green_mask_size;
tag->framebuffer_blue_field_position = mode_info.blue_field_pos;
tag->framebuffer_blue_mask_size = mode_info.blue_mask_size;
tag->common.size = sizeof (struct multiboot_tag_framebuffer_common) + 6;
}
*ptrorig += ALIGN_UP (tag->common.size, MULTIBOOT_TAG_ALIGN);
return GRUB_ERR_NONE;
}
grub_err_t
grub_multiboot_make_mbi (void *orig, grub_uint32_t dest, grub_off_t buf_off,
grub_size_t bufsize)
{
grub_uint8_t *ptrorig;
grub_uint8_t *mbistart = (grub_uint8_t *) orig + buf_off
+ (ALIGN_UP (dest + buf_off, MULTIBOOT_TAG_ALIGN) - (dest + buf_off));
grub_err_t err;
if (bufsize < grub_multiboot_get_mbi_size ())
return grub_error (GRUB_ERR_OUT_OF_MEMORY, "mbi buffer is too small");
ptrorig = mbistart + 2 * sizeof (grub_uint32_t);
{
struct multiboot_tag_string *tag = (struct multiboot_tag_string *) ptrorig;
tag->type = MULTIBOOT_TAG_TYPE_CMDLINE;
tag->size = sizeof (struct multiboot_tag_string) + cmdline_size;
grub_memcpy (tag->string, cmdline, cmdline_size);
ptrorig += ALIGN_UP (tag->size, MULTIBOOT_TAG_ALIGN);
}
{
struct multiboot_tag_string *tag = (struct multiboot_tag_string *) ptrorig;
tag->type = MULTIBOOT_TAG_TYPE_BOOT_LOADER_NAME;
tag->size = sizeof (struct multiboot_tag_string) + sizeof (PACKAGE_STRING);
grub_memcpy (tag->string, PACKAGE_STRING, sizeof (PACKAGE_STRING));
ptrorig += ALIGN_UP (tag->size, MULTIBOOT_TAG_ALIGN);
}
{
unsigned i;
struct module *cur;
for (i = 0, cur = modules; i < modcnt; i++, cur = cur->next)
{
struct multiboot_tag_module *tag
= (struct multiboot_tag_module *) ptrorig;
tag->type = MULTIBOOT_TAG_TYPE_MODULE;
tag->size = sizeof (struct multiboot_tag_module) + cur->cmdline_size;
tag->mod_start = dest + cur->start;
tag->mod_end = tag->mod_start + cur->size;
grub_memcpy (tag->cmdline, cur->cmdline, cur->cmdline_size);
ptrorig += ALIGN_UP (tag->size, MULTIBOOT_TAG_ALIGN);
}
}
{
struct multiboot_tag_mmap *tag = (struct multiboot_tag_mmap *) ptrorig;
grub_fill_multiboot_mmap (tag);
ptrorig += ALIGN_UP (tag->size, MULTIBOOT_TAG_ALIGN);
}
{
struct multiboot_tag_basic_meminfo *tag
= (struct multiboot_tag_basic_meminfo *) ptrorig;
tag->type = MULTIBOOT_TAG_TYPE_BASIC_MEMINFO;
tag->size = sizeof (struct multiboot_tag_basic_meminfo);
/* Convert from bytes to kilobytes. */
tag->mem_lower = grub_mmap_get_lower () / 1024;
tag->mem_upper = grub_mmap_get_upper () / 1024;
ptrorig += ALIGN_UP (tag->size, MULTIBOOT_TAG_ALIGN);
}
if (bootdev_set)
{
struct multiboot_tag_bootdev *tag
= (struct multiboot_tag_bootdev *) ptrorig;
tag->type = MULTIBOOT_TAG_TYPE_BOOTDEV;
tag->size = sizeof (struct multiboot_tag_bootdev);
tag->biosdev = biosdev;
tag->slice = slice;
tag->part = part;
ptrorig += ALIGN_UP (tag->size, MULTIBOOT_TAG_ALIGN);
}
{
err = retrieve_video_parameters (&ptrorig);
if (err)
{
grub_print_error ();
grub_errno = GRUB_ERR_NONE;
}
}
{
struct multiboot_tag *tag = (struct multiboot_tag *) ptrorig;
tag->type = MULTIBOOT_TAG_TYPE_END;
tag->size = sizeof (struct multiboot_tag);
ptrorig += ALIGN_UP (tag->size, MULTIBOOT_TAG_ALIGN);
}
((grub_uint32_t *) mbistart)[0] = ptrorig - mbistart;
((grub_uint32_t *) mbistart)[1] = 0;
return GRUB_ERR_NONE;
}
void
grub_multiboot_free_mbi (void)
{
struct module *cur, *next;
cmdline_size = 0;
total_modcmd = 0;
modcnt = 0;
grub_free (cmdline);
cmdline = NULL;
bootdev_set = 0;
for (cur = modules; cur; cur = next)
{
next = cur->next;
grub_free (cur->cmdline);
grub_free (cur);
}
modules = NULL;
modules_last = NULL;
}
grub_err_t
grub_multiboot_init_mbi (int argc, char *argv[])
{
grub_ssize_t len = 0;
char *p;
int i;
grub_multiboot_free_mbi ();
for (i = 0; i < argc; i++)
len += grub_strlen (argv[i]) + 1;
if (len == 0)
len = 1;
cmdline = p = grub_malloc (len);
if (! cmdline)
return grub_errno;
cmdline_size = len;
for (i = 0; i < argc; i++)
{
p = grub_stpcpy (p, argv[i]);
*(p++) = ' ';
}
/* Remove the space after the last word. */
if (p != cmdline)
p--;
*p = '\0';
return GRUB_ERR_NONE;
}
grub_err_t
grub_multiboot_add_module (grub_addr_t start, grub_size_t size,
int argc, char *argv[])
{
struct module *newmod;
char *p;
grub_ssize_t len = 0;
int i;
newmod = grub_malloc (sizeof (*newmod));
if (!newmod)
return grub_errno;
newmod->start = start;
newmod->size = size;
for (i = 0; i < argc; i++)
len += grub_strlen (argv[i]) + 1;
if (len == 0)
len = 1;
newmod->cmdline = p = grub_malloc (len);
if (! newmod->cmdline)
{
grub_free (newmod);
return grub_errno;
}
newmod->cmdline_size = len;
total_modcmd += ALIGN_UP (len, MULTIBOOT_TAG_ALIGN);
for (i = 0; i < argc; i++)
{
p = grub_stpcpy (p, argv[i]);
*(p++) = ' ';
}
/* Remove the space after the last word. */
if (p != newmod->cmdline)
p--;
*p = '\0';
if (modules_last)
modules_last->next = newmod;
else
{
modules = newmod;
modules_last->next = NULL;
}
modules_last = newmod;
modcnt++;
return GRUB_ERR_NONE;
}
void
grub_multiboot_set_bootdev (void)
{
grub_device_t dev;
slice = ~0;
part = ~0;
#ifdef GRUB_MACHINE_PCBIOS
biosdev = grub_get_root_biosnumber ();
#else
biosdev = 0xffffffff;
#endif
if (biosdev == 0xffffffff)
return;
dev = grub_device_open (0);
if (dev && dev->disk && dev->disk->partition)
{
if (dev->disk->partition->parent)
{
part = dev->disk->partition->number;
slice = dev->disk->partition->parent->number;
}
else
slice = dev->disk->partition->number;
}
if (dev)
grub_device_close (dev);
bootdev_set = 1;
}