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grub/grub-core/loader/multiboot_mbi2.c
Vladimir Serbinenko ef02b4ca93 multiboot: Simplify to avoid confusing assignment. 
Found by: Coverity scan.
2015-01-26 09:43:52 +01:00

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/*
* GRUB -- GRand Unified Bootloader
* Copyright (C) 1999,2000,2001,2002,2003,2004,2005,2007,2008,2009,2010,2011,2012,2013 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/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>
#include <grub/acpi.h>
#include <grub/i18n.h>
#include <grub/net.h>
#include <grub/lib/cmdline.h>
#if defined (GRUB_MACHINE_EFI)
#include <grub/efi/efi.h>
#endif
#if defined (GRUB_MACHINE_PCBIOS) || defined (GRUB_MACHINE_COREBOOT) || defined (GRUB_MACHINE_MULTIBOOT) || 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;
};
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 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;
static int keep_bs = 0;
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;
}
static struct multiboot_header *
find_header (grub_properly_aligned_t *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 <= (char *) buffer + len - 12);
header = (struct multiboot_header *) ((grub_uint32_t *) header + MULTIBOOT_HEADER_ALIGN / 4))
{
if (header->magic == MULTIBOOT_HEADER_MAGIC
&& !(header->magic + header->architecture
+ header->header_length + header->checksum)
&& header->architecture == MULTIBOOT_ARCHITECTURE_CURRENT)
return header;
}
return NULL;
}
grub_err_t
grub_multiboot_load (grub_file_t file, const char *filename)
{
grub_properly_aligned_t *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, N_("premature end of file %s"), filename);
}
COMPILE_TIME_ASSERT (MULTIBOOT_HEADER_ALIGN % 4 == 0);
header = find_header (buffer, len);
if (header == 0)
{
grub_free (buffer);
return grub_error (GRUB_ERR_BAD_ARGUMENT, "no multiboot header found");
}
COMPILE_TIME_ASSERT (MULTIBOOT_TAG_ALIGN % 4 == 0);
keep_bs = 0;
for (tag = (struct multiboot_header_tag *) (header + 1);
tag->type != MULTIBOOT_TAG_TYPE_END;
tag = (struct multiboot_header_tag *) ((grub_uint32_t *) tag + ALIGN_UP (tag->size, MULTIBOOT_TAG_ALIGN) / 4))
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:
case MULTIBOOT_TAG_TYPE_EFI32:
case MULTIBOOT_TAG_TYPE_EFI64:
case MULTIBOOT_TAG_TYPE_ACPI_OLD:
case MULTIBOOT_TAG_TYPE_ACPI_NEW:
case MULTIBOOT_TAG_TYPE_NETWORK:
case MULTIBOOT_TAG_TYPE_EFI_MMAP:
case MULTIBOOT_TAG_TYPE_EFI_BS:
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;
case MULTIBOOT_HEADER_TAG_EFI_BS:
keep_bs = 1;
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)
{
grub_uint64_t load_addr = (addr_tag->load_addr + 1)
? addr_tag->load_addr : (addr_tag->header_addr
- ((char *) header - (char *) buffer));
int offset = ((char *) header - (char *) buffer -
(addr_tag->header_addr - 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 - load_addr);
else
code_size = load_size;
err = grub_relocator_alloc_chunk_addr (grub_multiboot_relocator,
&ch, 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_uint8_t *) source + load_size, 0,
addr_tag->bss_end_addr - load_addr - load_size);
}
else
{
err = grub_multiboot_load_elf (file, filename, 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
acpiv2_size (void)
{
#if GRUB_MACHINE_HAS_ACPI
struct grub_acpi_rsdp_v20 *p = grub_acpi_get_rsdpv2 ();
if (!p)
return 0;
return ALIGN_UP (sizeof (struct multiboot_tag_old_acpi)
+ p->length, MULTIBOOT_TAG_ALIGN);
#else
return 0;
#endif
}
#ifdef GRUB_MACHINE_EFI
static grub_efi_uintn_t efi_mmap_size = 0;
/* Find the optimal number of pages for the memory map. Is it better to
move this code to efi/mm.c? */
static void
find_efi_mmap_size (void)
{
efi_mmap_size = (1 << 12);
while (1)
{
int ret;
grub_efi_memory_descriptor_t *mmap;
grub_efi_uintn_t desc_size;
grub_efi_uintn_t cur_mmap_size = efi_mmap_size;
mmap = grub_malloc (cur_mmap_size);
if (! mmap)
return;
ret = grub_efi_get_memory_map (&cur_mmap_size, mmap, 0, &desc_size, 0);
grub_free (mmap);
if (ret < 0)
return;
else if (ret > 0)
break;
if (efi_mmap_size < cur_mmap_size)
efi_mmap_size = cur_mmap_size;
efi_mmap_size += (1 << 12);
}
/* Increase the size a bit for safety, because GRUB allocates more on
later, and EFI itself may allocate more. */
efi_mmap_size += (3 << 12);
efi_mmap_size = ALIGN_UP (efi_mmap_size, 4096);
}
#endif
static grub_size_t
net_size (void)
{
struct grub_net_network_level_interface *net;
grub_size_t ret = 0;
FOR_NET_NETWORK_LEVEL_INTERFACES(net)
if (net->dhcp_ack)
ret += ALIGN_UP (sizeof (struct multiboot_tag_network) + net->dhcp_acklen,
MULTIBOOT_TAG_ALIGN);
return ret;
}
static grub_size_t
grub_multiboot_get_mbi_size (void)
{
#ifdef GRUB_MACHINE_EFI
if (!efi_mmap_size)
find_efi_mmap_size ();
#endif
return 2 * sizeof (grub_uint32_t) + sizeof (struct multiboot_tag)
+ 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)
+ ALIGN_UP (sizeof (struct multiboot_tag_efi32), MULTIBOOT_TAG_ALIGN)
+ ALIGN_UP (sizeof (struct multiboot_tag_efi64), MULTIBOOT_TAG_ALIGN)
+ ALIGN_UP (sizeof (struct multiboot_tag_old_acpi)
+ sizeof (struct grub_acpi_rsdp_v10), MULTIBOOT_TAG_ALIGN)
+ acpiv2_size ()
+ net_size ()
#ifdef GRUB_MACHINE_EFI
+ ALIGN_UP (sizeof (struct multiboot_tag_efi_mmap)
+ efi_mmap_size, MULTIBOOT_TAG_ALIGN)
#endif
+ sizeof (struct multiboot_tag_vbe) + MULTIBOOT_TAG_ALIGN - 1
+ sizeof (struct multiboot_tag_apm) + MULTIBOOT_TAG_ALIGN - 1;
}
/* 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)++;
return 0;
}
/* Fill previously allocated Multiboot mmap. */
static void
grub_fill_multiboot_mmap (struct multiboot_tag_mmap *tag)
{
struct multiboot_mmap_entry *mmap_entry = tag->entries;
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 (grub_fill_multiboot_mmap_iter, &mmap_entry);
}
#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_properly_aligned_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)
/ sizeof (grub_properly_aligned_t);
}
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)
/ sizeof (grub_properly_aligned_t);
}
#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)
/ sizeof (grub_properly_aligned_t);
return GRUB_ERR_NONE;
}
grub_err_t
grub_multiboot_make_mbi (grub_uint32_t *target)
{
grub_properly_aligned_t *ptrorig;
grub_properly_aligned_t *mbistart;
grub_err_t err;
grub_size_t bufsize;
grub_relocator_chunk_t ch;
bufsize = grub_multiboot_get_mbi_size ();
COMPILE_TIME_ASSERT (MULTIBOOT_TAG_ALIGN % sizeof (grub_properly_aligned_t) == 0);
err = grub_relocator_alloc_chunk_align (grub_multiboot_relocator, &ch,
0, 0xffffffff - bufsize,
bufsize, MULTIBOOT_TAG_ALIGN,
GRUB_RELOCATOR_PREFERENCE_NONE, 1);
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;
COMPILE_TIME_ASSERT ((2 * sizeof (grub_uint32_t))
% sizeof (grub_properly_aligned_t) == 0);
COMPILE_TIME_ASSERT (MULTIBOOT_TAG_ALIGN
% sizeof (grub_properly_aligned_t) == 0);
ptrorig += (2 * sizeof (grub_uint32_t)) / sizeof (grub_properly_aligned_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)
/ sizeof (grub_properly_aligned_t);
}
{
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)
/ sizeof (grub_properly_aligned_t);
}
#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)
/ sizeof (grub_properly_aligned_t);
}
}
#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)
/ sizeof (grub_properly_aligned_t);
}
}
{
struct multiboot_tag_mmap *tag = (struct multiboot_tag_mmap *) ptrorig;
grub_fill_multiboot_mmap (tag);
ptrorig += ALIGN_UP (tag->size, MULTIBOOT_TAG_ALIGN)
/ sizeof (grub_properly_aligned_t);
}
{
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)
/ sizeof (grub_properly_aligned_t);
}
{
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)
/ sizeof (grub_properly_aligned_t);
}
{
struct grub_net_network_level_interface *net;
FOR_NET_NETWORK_LEVEL_INTERFACES(net)
if (net->dhcp_ack)
{
struct multiboot_tag_network *tag
= (struct multiboot_tag_network *) ptrorig;
tag->type = MULTIBOOT_TAG_TYPE_NETWORK;
tag->size = sizeof (struct multiboot_tag_network) + net->dhcp_acklen;
grub_memcpy (tag->dhcpack, net->dhcp_ack, net->dhcp_acklen);
ptrorig += ALIGN_UP (tag->size, MULTIBOOT_TAG_ALIGN)
/ sizeof (grub_properly_aligned_t);
}
}
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)
/ sizeof (grub_properly_aligned_t);
}
{
err = retrieve_video_parameters (&ptrorig);
if (err)
{
grub_print_error ();
grub_errno = GRUB_ERR_NONE;
}
}
#if defined (GRUB_MACHINE_EFI) && defined (__x86_64__)
{
struct multiboot_tag_efi64 *tag = (struct multiboot_tag_efi64 *) ptrorig;
tag->type = MULTIBOOT_TAG_TYPE_EFI64;
tag->size = sizeof (*tag);
tag->pointer = (grub_addr_t) grub_efi_system_table;
ptrorig += ALIGN_UP (tag->size, MULTIBOOT_TAG_ALIGN)
/ sizeof (grub_properly_aligned_t);
}
#endif
#if defined (GRUB_MACHINE_EFI) && defined (__i386__)
{
struct multiboot_tag_efi32 *tag = (struct multiboot_tag_efi32 *) ptrorig;
tag->type = MULTIBOOT_TAG_TYPE_EFI32;
tag->size = sizeof (*tag);
tag->pointer = (grub_addr_t) grub_efi_system_table;
ptrorig += ALIGN_UP (tag->size, MULTIBOOT_TAG_ALIGN)
/ sizeof (grub_properly_aligned_t);
}
#endif
#if GRUB_MACHINE_HAS_ACPI
{
struct multiboot_tag_old_acpi *tag = (struct multiboot_tag_old_acpi *)
ptrorig;
struct grub_acpi_rsdp_v10 *a = grub_acpi_get_rsdpv1 ();
if (a)
{
tag->type = MULTIBOOT_TAG_TYPE_ACPI_OLD;
tag->size = sizeof (*tag) + sizeof (*a);
grub_memcpy (tag->rsdp, a, sizeof (*a));
ptrorig += ALIGN_UP (tag->size, MULTIBOOT_TAG_ALIGN)
/ sizeof (grub_properly_aligned_t);
}
}
{
struct multiboot_tag_new_acpi *tag = (struct multiboot_tag_new_acpi *)
ptrorig;
struct grub_acpi_rsdp_v20 *a = grub_acpi_get_rsdpv2 ();
if (a)
{
tag->type = MULTIBOOT_TAG_TYPE_ACPI_NEW;
tag->size = sizeof (*tag) + a->length;
grub_memcpy (tag->rsdp, a, a->length);
ptrorig += ALIGN_UP (tag->size, MULTIBOOT_TAG_ALIGN)
/ sizeof (grub_properly_aligned_t);
}
}
#endif
#ifdef GRUB_MACHINE_EFI
{
struct multiboot_tag_efi_mmap *tag = (struct multiboot_tag_efi_mmap *) ptrorig;
grub_efi_uintn_t efi_desc_size;
grub_efi_uint32_t efi_desc_version;
tag->type = MULTIBOOT_TAG_TYPE_EFI_MMAP;
tag->size = sizeof (*tag) + efi_mmap_size;
if (!keep_bs)
err = grub_efi_finish_boot_services (&efi_mmap_size, tag->efi_mmap, NULL,
&efi_desc_size, &efi_desc_version);
else
{
if (grub_efi_get_memory_map (&efi_mmap_size, (void *) tag->efi_mmap,
NULL,
&efi_desc_size, &efi_desc_version) <= 0)
err = grub_error (GRUB_ERR_IO, "couldn't retrieve memory map");
}
if (err)
return err;
tag->descr_size = efi_desc_size;
tag->descr_vers = efi_desc_version;
tag->size = sizeof (*tag) + efi_mmap_size;
ptrorig += ALIGN_UP (tag->size, MULTIBOOT_TAG_ALIGN)
/ sizeof (grub_properly_aligned_t);
}
if (keep_bs)
{
struct multiboot_tag *tag = (struct multiboot_tag *) ptrorig;
tag->type = MULTIBOOT_TAG_TYPE_EFI_BS;
tag->size = sizeof (struct multiboot_tag);
ptrorig += ALIGN_UP (tag->size, MULTIBOOT_TAG_ALIGN)
/ sizeof (grub_properly_aligned_t);
}
#endif
{
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)
/ sizeof (grub_properly_aligned_t);
}
((grub_uint32_t *) mbistart)[0] = (char *) ptrorig - (char *) 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;
grub_multiboot_free_mbi ();
len = grub_loader_cmdline_size (argc, argv);
cmdline = grub_malloc (len);
if (! cmdline)
return grub_errno;
cmdline_size = len;
grub_create_loader_cmdline (argc, argv, cmdline,
cmdline_size);
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;
grub_size_t len = 0;
newmod = grub_malloc (sizeof (*newmod));
if (!newmod)
return grub_errno;
newmod->start = start;
newmod->size = size;
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, MULTIBOOT_TAG_ALIGN);
grub_create_loader_cmdline (argc, argv, newmod->cmdline,
newmod->cmdline_size);
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_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;
}
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