main/vaseboot
main
/
vaseboot
1
0
Fork 0
Code Issues Pull Requests 1 Packages Projects Releases Wiki Activity
vaseboot/VasEBoot-core/loader/multiboot.c

460 lines
12 KiB
C
Raw Blame History

/* multiboot.c - boot a multiboot OS image. */
/*
* VasEBoot -- GRand Unified Bootloader
* Copyright (C) 1999,2000,2001,2002,2003,2004,2005,2007,2008,2009,2010 Free Software Foundation, Inc.
*
* VasEBoot 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.
*
* VasEBoot 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 VasEBoot. If not, see <http://www.gnu.org/licenses/>.
*/
/*
* FIXME: The following features from the Multiboot specification still
* need to be implemented:
* - drives table
* - ROM configuration table
* - SMBIOS tables
* - Networking information
*/
#include <VasEBoot/loader.h>
#include <VasEBoot/command.h>
#include <VasEBoot/multiboot.h>
#include <VasEBoot/cpu/multiboot.h>
#include <VasEBoot/elf.h>
#include <VasEBoot/aout.h>
#include <VasEBoot/file.h>
#include <VasEBoot/err.h>
#include <VasEBoot/dl.h>
#include <VasEBoot/mm.h>
#include <VasEBoot/misc.h>
#include <VasEBoot/env.h>
#include <VasEBoot/cpu/relocator.h>
#include <VasEBoot/video.h>
#include <VasEBoot/memory.h>
#include <VasEBoot/i18n.h>
#include <VasEBoot/tpm.h>
VasEBoot_MOD_LICENSE ("GPLv3+");
#ifdef VasEBoot_MACHINE_EFI
#include <VasEBoot/efi/efi.h>
#endif
struct VasEBoot_relocator *VasEBoot_multiboot_relocator = NULL;
VasEBoot_uint32_t VasEBoot_multiboot_payload_eip;
#if defined (VasEBoot_MACHINE_PCBIOS) || defined (VasEBoot_MACHINE_MULTIBOOT) || defined (VasEBoot_MACHINE_COREBOOT) || defined (VasEBoot_MACHINE_QEMU)
#define DEFAULT_VIDEO_MODE "text"
#else
#define DEFAULT_VIDEO_MODE "auto"
#endif
static int accepts_video;
static int accepts_ega_text;
static int console_required;
static VasEBoot_dl_t my_mod;
/* Helper for VasEBoot_get_multiboot_mmap_count. */
static int
count_hook (VasEBoot_uint64_t addr __attribute__ ((unused)),
VasEBoot_uint64_t size __attribute__ ((unused)),
VasEBoot_memory_type_t type __attribute__ ((unused)), void *data)
{
VasEBoot_size_t *count = data;
(*count)++;
return 0;
}
/* Return the length of the Multiboot mmap that will be needed to allocate
our platform's map. */
VasEBoot_uint32_t
VasEBoot_get_multiboot_mmap_count (void)
{
VasEBoot_size_t count = 0;
VasEBoot_mmap_iterate (count_hook, &count);
return count;
}
VasEBoot_err_t
VasEBoot_multiboot_set_video_mode (void)
{
VasEBoot_err_t err;
const char *modevar;
#if VasEBoot_MACHINE_HAS_VGA_TEXT
if (accepts_video)
#endif
{
modevar = VasEBoot_env_get ("gfxpayload");
if (! modevar || *modevar == 0)
err = VasEBoot_video_set_mode (DEFAULT_VIDEO_MODE, 0, 0);
else
{
char *tmp;
tmp = VasEBoot_xasprintf ("%s;" DEFAULT_VIDEO_MODE, modevar);
if (! tmp)
return VasEBoot_errno;
err = VasEBoot_video_set_mode (tmp, 0, 0);
VasEBoot_free (tmp);
}
}
#if VasEBoot_MACHINE_HAS_VGA_TEXT
else
err = VasEBoot_video_set_mode ("text", 0, 0);
#endif
return err;
}
#ifdef VasEBoot_MACHINE_EFI
#ifdef __x86_64__
#define VasEBoot_relocator_efi_boot VasEBoot_relocator64_efi_boot
#define VasEBoot_relocator_efi_state VasEBoot_relocator64_efi_state
#endif
#endif
#ifdef VasEBoot_relocator_efi_boot
static void
efi_boot (struct VasEBoot_relocator *rel,
VasEBoot_uint32_t target)
{
struct VasEBoot_relocator_efi_state state_efi = MULTIBOOT_EFI_INITIAL_STATE;
state_efi.MULTIBOOT_EFI_ENTRY_REGISTER = VasEBoot_multiboot_payload_eip;
state_efi.MULTIBOOT_EFI_MBI_REGISTER = target;
VasEBoot_relocator_efi_boot (rel, state_efi);
}
#else
#define VasEBoot_efi_is_finished 1
static void
efi_boot (struct VasEBoot_relocator *rel __attribute__ ((unused)),
VasEBoot_uint32_t target __attribute__ ((unused)))
{
}
#endif
#if defined (__i386__) || defined (__x86_64__)
static void
normal_boot (struct VasEBoot_relocator *rel, struct VasEBoot_relocator32_state state)
{
VasEBoot_relocator32_boot (rel, state, 0);
}
#else
static void
normal_boot (struct VasEBoot_relocator *rel, struct VasEBoot_relocator32_state state)
{
VasEBoot_relocator32_boot (rel, state);
}
#endif
static VasEBoot_err_t
VasEBoot_multiboot_boot (void)
{
VasEBoot_err_t err;
struct VasEBoot_relocator32_state state = MULTIBOOT_INITIAL_STATE;
state.MULTIBOOT_ENTRY_REGISTER = VasEBoot_multiboot_payload_eip;
err = VasEBoot_multiboot_make_mbi (&state.MULTIBOOT_MBI_REGISTER);
if (err)
return err;
if (VasEBoot_efi_is_finished)
normal_boot (VasEBoot_multiboot_relocator, state);
else
efi_boot (VasEBoot_multiboot_relocator, state.MULTIBOOT_MBI_REGISTER);
/* Not reached. */
return VasEBoot_ERR_NONE;
}
static VasEBoot_err_t
VasEBoot_multiboot_unload (void)
{
VasEBoot_multiboot_free_mbi ();
VasEBoot_relocator_unload (VasEBoot_multiboot_relocator);
VasEBoot_multiboot_relocator = NULL;
VasEBoot_dl_unref (my_mod);
return VasEBoot_ERR_NONE;
}
static VasEBoot_uint64_t highest_load;
#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. */
VasEBoot_err_t
VasEBoot_multiboot_load_elf (mbi_load_data_t *mld)
{
if (VasEBoot_multiboot_is_elf32 (mld->buffer))
return VasEBoot_multiboot_load_elf32 (mld);
else if (VasEBoot_multiboot_is_elf64 (mld->buffer))
return VasEBoot_multiboot_load_elf64 (mld);
return VasEBoot_error (VasEBoot_ERR_UNKNOWN_OS, N_("invalid arch-dependent ELF magic"));
}
VasEBoot_err_t
VasEBoot_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
& (VasEBoot_MULTIBOOT_CONSOLE_FRAMEBUFFER
| (VasEBoot_MACHINE_HAS_VGA_TEXT ? VasEBoot_MULTIBOOT_CONSOLE_EGA_TEXT : 0))))
{
if (console_required)
return VasEBoot_error (VasEBoot_ERR_BAD_OS,
"OS requires a console but none is available");
VasEBoot_puts_ (N_("WARNING: no console will be available to OS"));
accepts_video = 0;
accepts_ega_text = 0;
return VasEBoot_ERR_NONE;
}
if (console_type == VasEBoot_MULTIBOOT_CONSOLE_FRAMEBUFFER)
{
char *buf;
if (depth && width && height)
buf = VasEBoot_xasprintf ("%dx%dx%d,%dx%d,auto", width,
height, depth, width, height);
else if (width && height)
buf = VasEBoot_xasprintf ("%dx%d,auto", width, height);
else
buf = VasEBoot_strdup ("auto");
if (!buf)
return VasEBoot_errno;
VasEBoot_env_set ("gfxpayload", buf);
VasEBoot_free (buf);
}
else
{
#if VasEBoot_MACHINE_HAS_VGA_TEXT
VasEBoot_env_set ("gfxpayload", "text");
#else
/* Always use video if no VGA text is available. */
VasEBoot_env_set ("gfxpayload", "auto");
#endif
}
accepts_video = !!(accepted_consoles & VasEBoot_MULTIBOOT_CONSOLE_FRAMEBUFFER);
accepts_ega_text = !!(accepted_consoles & VasEBoot_MULTIBOOT_CONSOLE_EGA_TEXT);
return VasEBoot_ERR_NONE;
}
static VasEBoot_err_t
VasEBoot_cmd_multiboot (VasEBoot_command_t cmd __attribute__ ((unused)),
int argc, char *argv[])
{
VasEBoot_file_t file = 0;
VasEBoot_err_t err;
VasEBoot_loader_unset ();
highest_load = 0;
#ifndef VasEBoot_USE_MULTIBOOT2
VasEBoot_multiboot_quirks = VasEBoot_MULTIBOOT_QUIRKS_NONE;
int option_found = 0;
do
{
option_found = 0;
if (argc != 0 && VasEBoot_strcmp (argv[0], "--quirk-bad-kludge") == 0)
{
argc--;
argv++;
option_found = 1;
VasEBoot_multiboot_quirks |= VasEBoot_MULTIBOOT_QUIRK_BAD_KLUDGE;
}
if (argc != 0 && VasEBoot_strcmp (argv[0], "--quirk-modules-after-kernel") == 0)
{
argc--;
argv++;
option_found = 1;
VasEBoot_multiboot_quirks |= VasEBoot_MULTIBOOT_QUIRK_MODULES_AFTER_KERNEL;
}
} while (option_found);
#endif
if (argc == 0)
return VasEBoot_error (VasEBoot_ERR_BAD_ARGUMENT, N_("filename expected"));
file = VasEBoot_file_open (argv[0]);
if (! file)
return VasEBoot_errno;
VasEBoot_dl_ref (my_mod);
/* Skip filename. */
VasEBoot_multiboot_init_mbi (argc - 1, argv + 1);
VasEBoot_relocator_unload (VasEBoot_multiboot_relocator);
VasEBoot_multiboot_relocator = VasEBoot_relocator_new ();
if (!VasEBoot_multiboot_relocator)
goto fail;
err = VasEBoot_multiboot_load (file, argv[0]);
if (err)
goto fail;
VasEBoot_multiboot_set_bootdev ();
VasEBoot_loader_set (VasEBoot_multiboot_boot, VasEBoot_multiboot_unload, 0);
fail:
if (file)
VasEBoot_file_close (file);
if (VasEBoot_errno != VasEBoot_ERR_NONE)
{
VasEBoot_relocator_unload (VasEBoot_multiboot_relocator);
VasEBoot_multiboot_relocator = NULL;
VasEBoot_dl_unref (my_mod);
}
return VasEBoot_errno;
}
static VasEBoot_err_t
VasEBoot_cmd_module (VasEBoot_command_t cmd __attribute__ ((unused)),
int argc, char *argv[])
{
VasEBoot_file_t file = 0;
VasEBoot_ssize_t size;
void *module = NULL;
VasEBoot_addr_t target;
VasEBoot_err_t err;
int nounzip = 0;
VasEBoot_uint64_t lowest_addr = 0;
if (argc == 0)
return VasEBoot_error (VasEBoot_ERR_BAD_ARGUMENT, N_("filename expected"));
if (VasEBoot_strcmp (argv[0], "--nounzip") == 0)
{
argv++;
argc--;
nounzip = 1;
}
if (argc == 0)
return VasEBoot_error (VasEBoot_ERR_BAD_ARGUMENT, N_("filename expected"));
if (!VasEBoot_multiboot_relocator)
return VasEBoot_error (VasEBoot_ERR_BAD_ARGUMENT,
N_("you need to load the kernel first"));
if (nounzip)
VasEBoot_file_filter_disable_compression ();
file = VasEBoot_file_open (argv[0]);
if (! file)
return VasEBoot_errno;
#ifndef VasEBoot_USE_MULTIBOOT2
lowest_addr = 0x100000;
if (VasEBoot_multiboot_quirks & VasEBoot_MULTIBOOT_QUIRK_MODULES_AFTER_KERNEL)
lowest_addr = ALIGN_UP (highest_load + 1048576, 4096);
#endif
size = VasEBoot_file_size (file);
if (size)
{
VasEBoot_relocator_chunk_t ch;
err = VasEBoot_relocator_alloc_chunk_align (VasEBoot_multiboot_relocator, &ch,
lowest_addr, (0xffffffff - size) + 1,
size, MULTIBOOT_MOD_ALIGN,
VasEBoot_RELOCATOR_PREFERENCE_NONE, 1);
if (err)
{
VasEBoot_file_close (file);
return err;
}
module = get_virtual_current_address (ch);
target = get_physical_target_address (ch);
}
else
{
module = 0;
target = 0;
}
err = VasEBoot_multiboot_add_module (target, size, argc - 1, argv + 1);
if (err)
{
VasEBoot_file_close (file);
return err;
}
if (size && VasEBoot_file_read (file, module, size) != size)
{
VasEBoot_file_close (file);
if (!VasEBoot_errno)
VasEBoot_error (VasEBoot_ERR_FILE_READ_ERROR, N_("premature end of file %s"),
argv[0]);
return VasEBoot_errno;
}
VasEBoot_file_close (file);
VasEBoot_tpm_measure (module, size, VasEBoot_BINARY_PCR, "VasEBoot_multiboot", argv[0]);
VasEBoot_print_error();
return VasEBoot_ERR_NONE;
}
static VasEBoot_command_t cmd_multiboot, cmd_module;
VasEBoot_MOD_INIT(multiboot)
{
cmd_multiboot =
#ifdef VasEBoot_USE_MULTIBOOT2
VasEBoot_register_command ("multiboot2", VasEBoot_cmd_multiboot,
0, N_("Load a multiboot 2 kernel."));
cmd_module =
VasEBoot_register_command ("module2", VasEBoot_cmd_module,
0, N_("Load a multiboot 2 module."));
#else
VasEBoot_register_command ("multiboot", VasEBoot_cmd_multiboot,
0, N_("Load a multiboot kernel."));
cmd_module =
VasEBoot_register_command ("module", VasEBoot_cmd_module,
0, N_("Load a multiboot module."));
#endif
my_mod = mod;
}
VasEBoot_MOD_FINI(multiboot)
{
VasEBoot_unregister_command (cmd_multiboot);
VasEBoot_unregister_command (cmd_module);
}
Reference in New Issue View Git Blame Copy Permalink