diff options
Diffstat (limited to 'grub-core/loader/i386/multiboot_mbi.c')
| -rw-r--r-- | grub-core/loader/i386/multiboot_mbi.c | 756 |
1 files changed, 756 insertions, 0 deletions
diff --git a/grub-core/loader/i386/multiboot_mbi.c b/grub-core/loader/i386/multiboot_mbi.c new file mode 100644 index 0000000..a67d9d0 --- /dev/null +++ b/grub-core/loader/i386/multiboot_mbi.c @@ -0,0 +1,756 @@ +/* + * 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/memory.h> +#ifdef GRUB_MACHINE_PCBIOS +#include <grub/machine/biosnum.h> +#include <grub/machine/apm.h> +#include <grub/machine/memory.h> +#endif +#include <grub/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/relocator.h> +#include <grub/video.h> +#include <grub/file.h> +#include <grub/net.h> +#include <grub/i18n.h> +#include <grub/lib/cmdline.h> + +#ifdef GRUB_MACHINE_EFI +#include <grub/efi/efi.h> +#endif + +/* The bits in the required part of flags field we don't support. */ +#define UNSUPPORTED_FLAGS 0x0000fff8 + +struct module +{ + struct module *next; + grub_addr_t start; + grub_size_t size; + char *cmdline; + int cmdline_size; +}; + +static 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 grub_uint32_t bootdev; +static int bootdev_set; +static grub_size_t elf_sec_num, elf_sec_entsize; +static unsigned elf_sec_shstrndx; +static void *elf_sections; +grub_multiboot_quirks_t grub_multiboot_quirks; + +static grub_err_t +load_kernel (grub_file_t file, const char *filename, + char *buffer, struct multiboot_header *header) +{ + grub_err_t err; + mbi_load_data_t mld; + + mld.file = file; + mld.filename = filename; + mld.buffer = buffer; + mld.mbi_ver = 1; + mld.relocatable = 0; + mld.avoid_efi_boot_services = 0; + + if (grub_multiboot_quirks & GRUB_MULTIBOOT_QUIRK_BAD_KLUDGE) + { + err = grub_multiboot_load_elf (&mld); + if (err == GRUB_ERR_NONE) { + return GRUB_ERR_NONE; + } + if (err == GRUB_ERR_UNKNOWN_OS && (header->flags & MULTIBOOT_AOUT_KLUDGE)) + grub_errno = err = GRUB_ERR_NONE; + } + if (header->flags & MULTIBOOT_AOUT_KLUDGE) + { + int offset = ((char *) header - buffer - + (header->header_addr - header->load_addr)); + int load_size = ((header->load_end_addr == 0) ? file->size - offset : + header->load_end_addr - header->load_addr); + grub_size_t code_size; + void *source; + grub_relocator_chunk_t ch; + + if (header->bss_end_addr) + code_size = (header->bss_end_addr - header->load_addr); + else + code_size = load_size; + + err = grub_relocator_alloc_chunk_addr (grub_multiboot_relocator, + &ch, header->load_addr, + code_size); + if (err) + { + grub_dprintf ("multiboot_loader", "Error loading aout kludge\n"); + return err; + } + source = get_virtual_current_address (ch); + + if ((grub_file_seek (file, offset)) == (grub_off_t) -1) + { + return grub_errno; + } + + grub_file_read (file, source, load_size); + if (grub_errno) + return grub_errno; + + if (header->bss_end_addr) + grub_memset ((grub_uint8_t *) source + load_size, 0, + header->bss_end_addr - header->load_addr - load_size); + + grub_multiboot_payload_eip = header->entry_addr; + return GRUB_ERR_NONE; + } + + return grub_multiboot_load_elf (&mld); +} + +static struct multiboot_header * +find_header (char *buffer, grub_ssize_t len) +{ + struct multiboot_header *header; + + /* 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 = (struct multiboot_header *) ((char *) header + MULTIBOOT_HEADER_ALIGN)) + { + if (header->magic == MULTIBOOT_HEADER_MAGIC + && !(header->magic + header->flags + header->checksum)) + return header; + } + return NULL; +} + +grub_err_t +grub_multiboot_load (grub_file_t file, const char *filename) +{ + char *buffer; + grub_ssize_t len; + struct multiboot_header *header; + grub_err_t err; + + buffer = grub_malloc (MULTIBOOT_SEARCH); + if (!buffer) + return grub_errno; + + len = grub_file_read (file, buffer, MULTIBOOT_SEARCH); + if (len < 32) + { + grub_free (buffer); + if (!grub_errno) + grub_error (GRUB_ERR_BAD_OS, N_("premature end of file %s"), + filename); + return grub_errno; + } + + header = find_header (buffer, len); + + if (header == 0) + { + grub_free (buffer); + return grub_error (GRUB_ERR_BAD_ARGUMENT, "no multiboot header found"); + } + + if (header->flags & UNSUPPORTED_FLAGS) + { + grub_free (buffer); + return grub_error (GRUB_ERR_UNKNOWN_OS, + "unsupported flag: 0x%x", header->flags); + } + + err = load_kernel (file, filename, buffer, header); + if (err) + { + grub_free (buffer); + return err; + } + + if (header->flags & MULTIBOOT_VIDEO_MODE) + { + switch (header->mode_type) + { + case 1: + err = grub_multiboot_set_console (GRUB_MULTIBOOT_CONSOLE_EGA_TEXT, + GRUB_MULTIBOOT_CONSOLE_EGA_TEXT + | GRUB_MULTIBOOT_CONSOLE_FRAMEBUFFER, + 0, 0, 0, 0); + break; + case 0: + err = grub_multiboot_set_console (GRUB_MULTIBOOT_CONSOLE_FRAMEBUFFER, + GRUB_MULTIBOOT_CONSOLE_EGA_TEXT + | GRUB_MULTIBOOT_CONSOLE_FRAMEBUFFER, + header->width, header->height, + header->depth, 0); + break; + default: + err = grub_error (GRUB_ERR_BAD_OS, + "unsupported graphical mode type %d", + header->mode_type); + break; + } + } + else + err = grub_multiboot_set_console (GRUB_MULTIBOOT_CONSOLE_EGA_TEXT, + GRUB_MULTIBOOT_CONSOLE_EGA_TEXT, + 0, 0, 0, 0); + return err; +} + +#if GRUB_MACHINE_HAS_VBE || GRUB_MACHINE_HAS_VGA_TEXT +#include <grub/i386/pc/vbe.h> +#endif + +static grub_size_t +grub_multiboot_get_mbi_size (void) +{ + grub_size_t ret; + struct grub_net_network_level_interface *net; + + ret = sizeof (struct multiboot_info) + ALIGN_UP (cmdline_size, 4) + + modcnt * sizeof (struct multiboot_mod_list) + total_modcmd + + ALIGN_UP (sizeof(PACKAGE_STRING), 4) + + grub_multiboot_get_mmap_count () * sizeof (struct multiboot_mmap_entry) + + elf_sec_entsize * elf_sec_num + + 256 * sizeof (struct multiboot_color) +#if GRUB_MACHINE_HAS_VBE || GRUB_MACHINE_HAS_VGA_TEXT + + sizeof (struct grub_vbe_info_block) + + sizeof (struct grub_vbe_mode_info_block) +#endif + + ALIGN_UP (sizeof (struct multiboot_apm_info), 4); + + FOR_NET_NETWORK_LEVEL_INTERFACES(net) + if (net->dhcp_ack) + { + ret += net->dhcp_acklen; + break; + } + + return ret; +} + +/* Helper for grub_fill_multiboot_mmap. */ +static int +grub_fill_multiboot_mmap_iter (grub_uint64_t addr, grub_uint64_t size, + grub_memory_type_t type, void *data) +{ + struct multiboot_mmap_entry **mmap_entry = data; + + (*mmap_entry)->addr = addr; + (*mmap_entry)->len = size; + (*mmap_entry)->type = type; + (*mmap_entry)->size = sizeof (struct multiboot_mmap_entry) - sizeof ((*mmap_entry)->size); + (*mmap_entry)++; + + return 0; +} + +/* Fill previously allocated Multiboot mmap. */ +static void +grub_fill_multiboot_mmap (struct multiboot_mmap_entry *first_entry) +{ + struct multiboot_mmap_entry *mmap_entry = (struct multiboot_mmap_entry *) first_entry; + + grub_mmap_iterate (grub_fill_multiboot_mmap_iter, &mmap_entry); +} + +#if GRUB_MACHINE_HAS_VBE || GRUB_MACHINE_HAS_VGA_TEXT + +static grub_err_t +fill_vbe_info (struct multiboot_info *mbi, grub_uint8_t *ptrorig, + grub_uint32_t ptrdest, int fill_generic) +{ + grub_uint32_t vbe_mode; + struct grub_vbe_mode_info_block *mode_info; +#if GRUB_MACHINE_HAS_VBE + grub_vbe_status_t status; + void *scratch = (void *) GRUB_MEMORY_MACHINE_SCRATCH_ADDR; + + status = grub_vbe_bios_get_controller_info (scratch); + if (status != GRUB_VBE_STATUS_OK) + return grub_error (GRUB_ERR_IO, "Can't get controller info."); + + mbi->vbe_control_info = ptrdest; + grub_memcpy (ptrorig, scratch, sizeof (struct grub_vbe_info_block)); + ptrorig += sizeof (struct grub_vbe_info_block); + ptrdest += sizeof (struct grub_vbe_info_block); +#else + mbi->vbe_control_info = 0; +#endif + +#if GRUB_MACHINE_HAS_VBE + status = grub_vbe_bios_get_mode (scratch); + vbe_mode = *(grub_uint32_t *) scratch; + if (status != GRUB_VBE_STATUS_OK) + return grub_error (GRUB_ERR_IO, "can't get VBE mode"); +#else + vbe_mode = 3; +#endif + mbi->vbe_mode = vbe_mode; + + mode_info = (struct grub_vbe_mode_info_block *) ptrorig; + mbi->vbe_mode_info = ptrdest; + /* get_mode_info isn't available for mode 3. */ + if (vbe_mode == 3) + { + grub_memset (mode_info, 0, sizeof (struct grub_vbe_mode_info_block)); + mode_info->memory_model = GRUB_VBE_MEMORY_MODEL_TEXT; + mode_info->x_resolution = 80; + mode_info->y_resolution = 25; + } + else + { +#if GRUB_MACHINE_HAS_VBE + status = grub_vbe_bios_get_mode_info (vbe_mode, scratch); + if (status != GRUB_VBE_STATUS_OK) + return grub_error (GRUB_ERR_IO, "can't get mode info"); + grub_memcpy (mode_info, scratch, + sizeof (struct grub_vbe_mode_info_block)); +#endif + } + ptrorig += sizeof (struct grub_vbe_mode_info_block); + ptrdest += sizeof (struct grub_vbe_mode_info_block); + +#if GRUB_MACHINE_HAS_VBE + grub_vbe_bios_get_pm_interface (&mbi->vbe_interface_seg, + &mbi->vbe_interface_off, + &mbi->vbe_interface_len); +#endif + + mbi->flags |= MULTIBOOT_INFO_VBE_INFO; + + if (fill_generic && mode_info->memory_model == GRUB_VBE_MEMORY_MODEL_TEXT) + { + mbi->framebuffer_addr = 0xb8000; + + mbi->framebuffer_pitch = 2 * mode_info->x_resolution; + mbi->framebuffer_width = mode_info->x_resolution; + mbi->framebuffer_height = mode_info->y_resolution; + + mbi->framebuffer_bpp = 16; + + mbi->framebuffer_type = MULTIBOOT_FRAMEBUFFER_TYPE_EGA_TEXT; + + mbi->flags |= MULTIBOOT_INFO_FRAMEBUFFER_INFO; + } + + return GRUB_ERR_NONE; +} +#endif + +static grub_err_t +retrieve_video_parameters (struct multiboot_info *mbi, + grub_uint8_t *ptrorig, grub_uint32_t ptrdest) +{ + 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]; + + 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 GRUB_MACHINE_HAS_VGA_TEXT + if (driv_id == GRUB_VIDEO_DRIVER_NONE) + return fill_vbe_info (mbi, ptrorig, ptrdest, 1); +#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; + + mbi->framebuffer_addr = (grub_addr_t) framebuffer; + mbi->framebuffer_pitch = mode_info.pitch; + + mbi->framebuffer_width = mode_info.width; + mbi->framebuffer_height = mode_info.height; + + mbi->framebuffer_bpp = mode_info.bpp; + + if (mode_info.mode_type & GRUB_VIDEO_MODE_TYPE_INDEX_COLOR) + { + struct multiboot_color *mb_palette; + unsigned i; + mbi->framebuffer_type = MULTIBOOT_FRAMEBUFFER_TYPE_INDEXED; + mbi->framebuffer_palette_addr = ptrdest; + mbi->framebuffer_palette_num_colors = mode_info.number_of_colors; + if (mbi->framebuffer_palette_num_colors > ARRAY_SIZE (palette)) + mbi->framebuffer_palette_num_colors = ARRAY_SIZE (palette); + mb_palette = (struct multiboot_color *) ptrorig; + for (i = 0; i < mbi->framebuffer_palette_num_colors; i++) + { + mb_palette[i].red = palette[i].r; + mb_palette[i].green = palette[i].g; + mb_palette[i].blue = palette[i].b; + } + ptrorig += mbi->framebuffer_palette_num_colors + * sizeof (struct multiboot_color); + ptrdest += mbi->framebuffer_palette_num_colors + * sizeof (struct multiboot_color); + } + else + { + mbi->framebuffer_type = MULTIBOOT_FRAMEBUFFER_TYPE_RGB; + mbi->framebuffer_red_field_position = mode_info.red_field_pos; + mbi->framebuffer_red_mask_size = mode_info.red_mask_size; + mbi->framebuffer_green_field_position = mode_info.green_field_pos; + mbi->framebuffer_green_mask_size = mode_info.green_mask_size; + mbi->framebuffer_blue_field_position = mode_info.blue_field_pos; + mbi->framebuffer_blue_mask_size = mode_info.blue_mask_size; + } + + mbi->flags |= MULTIBOOT_INFO_FRAMEBUFFER_INFO; + +#if GRUB_MACHINE_HAS_VBE + if (driv_id == GRUB_VIDEO_DRIVER_VBE) + return fill_vbe_info (mbi, ptrorig, ptrdest, 0); +#endif + + return GRUB_ERR_NONE; +} + +grub_err_t +grub_multiboot_make_mbi (grub_uint32_t *target) +{ + struct multiboot_info *mbi; + struct multiboot_mod_list *modlist; + unsigned i; + struct module *cur; + grub_size_t mmap_size; + grub_uint8_t *ptrorig; + grub_addr_t ptrdest; + + grub_err_t err; + grub_size_t bufsize; + grub_relocator_chunk_t ch; + + bufsize = grub_multiboot_get_mbi_size (); + + err = grub_relocator_alloc_chunk_align_safe (grub_multiboot_relocator, &ch, + 0x10000, 0xa0000, bufsize, 4, + GRUB_RELOCATOR_PREFERENCE_NONE, 0); + if (err) + return err; + ptrorig = get_virtual_current_address (ch); + ptrdest = get_physical_target_address (ch); + + *target = ptrdest; + + mbi = (struct multiboot_info *) ptrorig; + ptrorig += sizeof (*mbi); + ptrdest += sizeof (*mbi); + grub_memset (mbi, 0, sizeof (*mbi)); + + grub_memcpy (ptrorig, cmdline, cmdline_size); + mbi->flags |= MULTIBOOT_INFO_CMDLINE; + mbi->cmdline = ptrdest; + ptrorig += ALIGN_UP (cmdline_size, 4); + ptrdest += ALIGN_UP (cmdline_size, 4); + + grub_memcpy (ptrorig, PACKAGE_STRING, sizeof(PACKAGE_STRING)); + mbi->flags |= MULTIBOOT_INFO_BOOT_LOADER_NAME; + mbi->boot_loader_name = ptrdest; + ptrorig += ALIGN_UP (sizeof(PACKAGE_STRING), 4); + ptrdest += ALIGN_UP (sizeof(PACKAGE_STRING), 4); + +#ifdef GRUB_MACHINE_PCBIOS + { + struct grub_apm_info info; + if (grub_apm_get_info (&info)) + { + struct multiboot_apm_info *mbinfo = (void *) ptrorig; + + mbinfo->cseg = info.cseg; + mbinfo->offset = info.offset; + mbinfo->cseg_16 = info.cseg_16; + mbinfo->dseg = info.dseg; + mbinfo->flags = info.flags; + mbinfo->cseg_len = info.cseg_len; + mbinfo->dseg_len = info.dseg_len; + mbinfo->cseg_16_len = info.cseg_16_len; + mbinfo->version = info.version; + + ptrorig += ALIGN_UP (sizeof (struct multiboot_apm_info), 4); + ptrdest += ALIGN_UP (sizeof (struct multiboot_apm_info), 4); + } + } +#endif + + if (modcnt) + { + mbi->flags |= MULTIBOOT_INFO_MODS; + mbi->mods_addr = ptrdest; + mbi->mods_count = modcnt; + modlist = (struct multiboot_mod_list *) ptrorig; + ptrorig += modcnt * sizeof (struct multiboot_mod_list); + ptrdest += modcnt * sizeof (struct multiboot_mod_list); + + for (i = 0, cur = modules; i < modcnt; i++, cur = cur->next) + { + modlist[i].mod_start = cur->start; + modlist[i].mod_end = modlist[i].mod_start + cur->size; + modlist[i].cmdline = ptrdest; + grub_memcpy (ptrorig, cur->cmdline, cur->cmdline_size); + ptrorig += ALIGN_UP (cur->cmdline_size, 4); + ptrdest += ALIGN_UP (cur->cmdline_size, 4); + } + } + else + { + mbi->mods_addr = 0; + mbi->mods_count = 0; + } + + mmap_size = grub_multiboot_get_mmap_count () + * sizeof (struct multiboot_mmap_entry); + grub_fill_multiboot_mmap ((struct multiboot_mmap_entry *) ptrorig); + mbi->mmap_length = mmap_size; + mbi->mmap_addr = ptrdest; + mbi->flags |= MULTIBOOT_INFO_MEM_MAP; + ptrorig += mmap_size; + ptrdest += mmap_size; + + /* Convert from bytes to kilobytes. */ + mbi->mem_lower = grub_mmap_get_lower () / 1024; + mbi->mem_upper = grub_mmap_get_upper () / 1024; + mbi->flags |= MULTIBOOT_INFO_MEMORY; + + if (bootdev_set) + { + mbi->boot_device = bootdev; + mbi->flags |= MULTIBOOT_INFO_BOOTDEV; + } + + { + struct grub_net_network_level_interface *net; + FOR_NET_NETWORK_LEVEL_INTERFACES(net) + if (net->dhcp_ack) + { + grub_memcpy (ptrorig, net->dhcp_ack, net->dhcp_acklen); + mbi->drives_addr = ptrdest; + mbi->drives_length = net->dhcp_acklen; + ptrorig += net->dhcp_acklen; + ptrdest += net->dhcp_acklen; + break; + } + } + + if (elf_sec_num) + { + mbi->u.elf_sec.addr = ptrdest; + grub_memcpy (ptrorig, elf_sections, elf_sec_entsize * elf_sec_num); + mbi->u.elf_sec.num = elf_sec_num; + mbi->u.elf_sec.size = elf_sec_entsize; + mbi->u.elf_sec.shndx = elf_sec_shstrndx; + + mbi->flags |= MULTIBOOT_INFO_ELF_SHDR; + + ptrorig += elf_sec_entsize * elf_sec_num; + ptrdest += elf_sec_entsize * elf_sec_num; + } + + err = retrieve_video_parameters (mbi, ptrorig, ptrdest); + if (err) + { + grub_print_error (); + grub_errno = GRUB_ERR_NONE; + } + + if ((mbi->flags & MULTIBOOT_INFO_FRAMEBUFFER_INFO) + && mbi->framebuffer_type == MULTIBOOT_FRAMEBUFFER_TYPE_INDEXED) + { + ptrorig += mbi->framebuffer_palette_num_colors + * sizeof (struct multiboot_color); + ptrdest += mbi->framebuffer_palette_num_colors + * sizeof (struct multiboot_color); + } + +#if GRUB_MACHINE_HAS_VBE + ptrorig += sizeof (struct grub_vbe_info_block); + ptrdest += sizeof (struct grub_vbe_info_block); + ptrorig += sizeof (struct grub_vbe_mode_info_block); + ptrdest += sizeof (struct grub_vbe_mode_info_block); +#endif + +#ifdef GRUB_MACHINE_EFI + err = grub_efi_finish_boot_services (NULL, NULL, NULL, NULL, NULL); + if (err) + return err; +#endif + + return GRUB_ERR_NONE; +} + +void +grub_multiboot_add_elfsyms (grub_size_t num, grub_size_t entsize, + unsigned shndx, void *data) +{ + elf_sec_num = num; + elf_sec_shstrndx = shndx; + elf_sec_entsize = entsize; + elf_sections = data; +} + +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_free (elf_sections); + elf_sections = NULL; + elf_sec_entsize = 0; + elf_sec_num = 0; +} + +grub_err_t +grub_multiboot_init_mbi (int argc, char *argv[]) +{ + grub_ssize_t len = 0; + + grub_multiboot_free_mbi (); + + len = grub_loader_cmdline_size (argc, argv); + + cmdline = grub_malloc (len); + if (! cmdline) + return grub_errno; + cmdline_size = len; + + return grub_create_loader_cmdline (argc, argv, cmdline, + cmdline_size, GRUB_VERIFY_KERNEL_CMDLINE); +} + +grub_err_t +grub_multiboot_add_module (grub_addr_t start, grub_size_t size, + int argc, char *argv[]) +{ + struct module *newmod; + grub_size_t len = 0; + grub_err_t err; + + newmod = grub_malloc (sizeof (*newmod)); + if (!newmod) + return grub_errno; + newmod->start = start; + newmod->size = size; + newmod->next = 0; + + len = grub_loader_cmdline_size (argc, argv); + + newmod->cmdline = grub_malloc (len); + if (! newmod->cmdline) + { + grub_free (newmod); + return grub_errno; + } + newmod->cmdline_size = len; + total_modcmd += ALIGN_UP (len, 4); + + err = grub_create_loader_cmdline (argc, argv, newmod->cmdline, + newmod->cmdline_size, GRUB_VERIFY_MODULE_CMDLINE); + if (err) + { + grub_free (newmod); + return grub_errno; + } + + if (modules_last) + modules_last->next = newmod; + else + modules = newmod; + modules_last = newmod; + + modcnt++; + + return GRUB_ERR_NONE; +} + +void +grub_multiboot_set_bootdev (void) +{ + grub_uint32_t biosdev, slice = ~0, part = ~0; + grub_device_t dev; + +#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 = ((biosdev & 0xff) << 24) | ((slice & 0xff) << 16) + | ((part & 0xff) << 8) | 0xff; + bootdev_set = 1; +} |