/* * 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 . */ #include #ifdef GRUB_MACHINE_PCBIOS #include #include #include #endif #include #include #include #include #include #include #include #include #include #include #if defined (GRUB_MACHINE_PCBIOS) || defined (GRUB_MACHINE_COREBOOT) || defined (GRUB_MACHINE_MULTIBOOT) || defined (GRUB_MACHINE_QEMU) #include #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; static grub_size_t elf_sec_num, elf_sec_entsize; static unsigned elf_sec_shstrndx; static void *elf_sections; 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; } 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: case MULTIBOOT_TAG_TYPE_VBE: case MULTIBOOT_TAG_TYPE_ELF_SECTIONS: case MULTIBOOT_TAG_TYPE_APM: break; 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; void *source; grub_relocator_chunk_t ch; if (addr_tag->bss_end_addr) code_size = (addr_tag->bss_end_addr - addr_tag->load_addr); else code_size = load_size; err = grub_relocator_alloc_chunk_addr (grub_multiboot_relocator, &ch, addr_tag->load_addr, code_size); if (err) { grub_dprintf ("multiboot_loader", "Error loading aout kludge\n"); grub_free (buffer); return err; } source = get_virtual_current_address (ch); if ((grub_file_seek (file, offset)) == (grub_off_t) -1) { grub_free (buffer); return grub_errno; } grub_file_read (file, source, load_size); if (grub_errno) { grub_free (buffer); return grub_errno; } if (addr_tag->bss_end_addr) grub_memset ((grub_uint32_t *) source + 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; } static 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) + ALIGN_UP (sizeof (struct multiboot_tag_basic_meminfo), MULTIBOOT_TAG_ALIGN) + ALIGN_UP (sizeof (struct multiboot_tag_bootdev), MULTIBOOT_TAG_ALIGN) + ALIGN_UP (sizeof (struct multiboot_tag_elf_sections), MULTIBOOT_TAG_ALIGN) + ALIGN_UP (elf_sec_entsize * elf_sec_num, MULTIBOOT_TAG_ALIGN) + ALIGN_UP ((sizeof (struct multiboot_tag_mmap) + grub_get_multiboot_mmap_count () * sizeof (struct multiboot_mmap_entry)), MULTIBOOT_TAG_ALIGN) + ALIGN_UP (sizeof (struct multiboot_tag_framebuffer), MULTIBOOT_TAG_ALIGN) + sizeof (struct multiboot_tag_vbe) + MULTIBOOT_TAG_ALIGN - 1 + sizeof (struct multiboot_tag_apm) + 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_memory_type_t); int NESTED_FUNC_ATTR hook (grub_uint64_t addr, grub_uint64_t size, grub_memory_type_t type) { mmap_entry->addr = addr; mmap_entry->len = size; switch (type) { case GRUB_MEMORY_AVAILABLE: mmap_entry->type = MULTIBOOT_MEMORY_AVAILABLE; break; case GRUB_MEMORY_ACPI: mmap_entry->type = MULTIBOOT_MEMORY_ACPI_RECLAIMABLE; break; case GRUB_MEMORY_NVS: mmap_entry->type = MULTIBOOT_MEMORY_NVS; break; 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); } #if defined (GRUB_MACHINE_PCBIOS) static void fill_vbe_tag (struct multiboot_tag_vbe *tag) { grub_vbe_status_t status; void *scratch = (void *) GRUB_MEMORY_MACHINE_SCRATCH_ADDR; tag->type = MULTIBOOT_TAG_TYPE_VBE; tag->size = 0; status = grub_vbe_bios_get_controller_info (scratch); if (status != GRUB_VBE_STATUS_OK) return; grub_memcpy (&tag->vbe_control_info, scratch, sizeof (struct grub_vbe_info_block)); status = grub_vbe_bios_get_mode (scratch); tag->vbe_mode = *(grub_uint32_t *) scratch; if (status != GRUB_VBE_STATUS_OK) return; /* get_mode_info isn't available for mode 3. */ if (tag->vbe_mode == 3) { struct grub_vbe_mode_info_block *mode_info = (void *) &tag->vbe_mode_info; 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 { status = grub_vbe_bios_get_mode_info (tag->vbe_mode, scratch); if (status != GRUB_VBE_STATUS_OK) return; grub_memcpy (&tag->vbe_mode_info, scratch, sizeof (struct grub_vbe_mode_info_block)); } grub_vbe_bios_get_pm_interface (&tag->vbe_interface_seg, &tag->vbe_interface_off, &tag->vbe_interface_len); tag->size = sizeof (*tag); } #endif 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 #if GRUB_MACHINE_HAS_VBE { struct multiboot_tag_vbe *tag_vbe = (struct multiboot_tag_vbe *) *ptrorig; fill_vbe_tag (tag_vbe); *ptrorig += ALIGN_UP (tag_vbe->size, MULTIBOOT_TAG_ALIGN); } #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->framebuffer_red_field_position = mode_info.red_field_pos; tag->framebuffer_red_mask_size = mode_info.red_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 (grub_uint32_t *target) { grub_uint8_t *ptrorig; grub_uint8_t *mbistart; 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 (grub_multiboot_relocator, &ch, 0, 0xffffffff - bufsize, bufsize, MULTIBOOT_TAG_ALIGN, GRUB_RELOCATOR_PREFERENCE_NONE); if (err) return err; ptrorig = get_virtual_current_address (ch); #if defined (__i386__) || defined (__x86_64__) *target = get_physical_target_address (ch); #elif defined (__mips) *target = get_physical_target_address (ch) | 0x80000000; #else #error Please complete this #endif mbistart = ptrorig; ptrorig += 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); } #ifdef GRUB_MACHINE_PCBIOS { struct grub_apm_info info; if (grub_apm_get_info (&info)) { struct multiboot_tag_apm *tag = (struct multiboot_tag_apm *) ptrorig; tag->type = MULTIBOOT_TAG_TYPE_APM; tag->size = sizeof (struct multiboot_tag_apm); tag->cseg = info.cseg; tag->offset = info.offset; tag->cseg_16 = info.cseg_16; tag->dseg = info.dseg; tag->flags = info.flags; tag->cseg_len = info.cseg_len; tag->dseg_len = info.dseg_len; tag->cseg_16_len = info.cseg_16_len; tag->version = info.version; ptrorig += ALIGN_UP (tag->size, MULTIBOOT_TAG_ALIGN); } } #endif { 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 = 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_elf_sections *tag = (struct multiboot_tag_elf_sections *) ptrorig; tag->type = MULTIBOOT_TAG_TYPE_ELF_SECTIONS; tag->size = sizeof (struct multiboot_tag_elf_sections) + elf_sec_entsize * elf_sec_num; grub_memcpy (tag->sections, elf_sections, elf_sec_entsize * elf_sec_num); tag->num = elf_sec_num; tag->entsize = elf_sec_entsize; tag->shndx = elf_sec_shstrndx; 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; }