119d11c885
* grub-core/loader/i386/linux.c (find_efi_mmap_size): Return 0 on error. (allocate_pages): Check find_efi_mmap_size return value. (grub_e820_add_region): Return error. (grub_linux_boot): Check mmap return value.
1050 lines
27 KiB
C
1050 lines
27 KiB
C
/*
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* GRUB -- GRand Unified Bootloader
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* Copyright (C) 2006,2007,2008,2009,2010 Free Software Foundation, Inc.
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*
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* GRUB is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* GRUB is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with GRUB. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include <grub/loader.h>
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#include <grub/memory.h>
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#include <grub/normal.h>
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#include <grub/file.h>
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#include <grub/disk.h>
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#include <grub/err.h>
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#include <grub/misc.h>
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#include <grub/types.h>
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#include <grub/dl.h>
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#include <grub/mm.h>
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#include <grub/term.h>
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#include <grub/cpu/linux.h>
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#include <grub/video.h>
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#include <grub/video_fb.h>
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#include <grub/command.h>
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#include <grub/i386/relocator.h>
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#include <grub/i18n.h>
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#include <grub/lib/cmdline.h>
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GRUB_MOD_LICENSE ("GPLv3+");
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#ifdef GRUB_MACHINE_PCBIOS
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#include <grub/i386/pc/vesa_modes_table.h>
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#endif
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#ifdef GRUB_MACHINE_EFI
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#include <grub/efi/efi.h>
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#define HAS_VGA_TEXT 0
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#define DEFAULT_VIDEO_MODE "auto"
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#define ACCEPTS_PURE_TEXT 0
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#elif defined (GRUB_MACHINE_IEEE1275)
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#include <grub/ieee1275/ieee1275.h>
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#define HAS_VGA_TEXT 0
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#define DEFAULT_VIDEO_MODE "text"
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#define ACCEPTS_PURE_TEXT 1
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#else
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#include <grub/i386/pc/vbe.h>
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#include <grub/i386/pc/console.h>
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#define HAS_VGA_TEXT 1
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#define DEFAULT_VIDEO_MODE "text"
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#define ACCEPTS_PURE_TEXT 1
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#endif
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#define GRUB_LINUX_CL_OFFSET 0x1000
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static grub_dl_t my_mod;
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static grub_size_t linux_mem_size;
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static int loaded;
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static void *real_mode_mem;
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static grub_addr_t real_mode_target;
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static void *prot_mode_mem;
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static grub_addr_t prot_mode_target;
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static void *initrd_mem;
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static grub_addr_t initrd_mem_target;
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static grub_uint32_t real_mode_pages;
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static grub_uint32_t prot_mode_pages;
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static grub_uint32_t initrd_pages;
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static struct grub_relocator *relocator = NULL;
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static void *efi_mmap_buf;
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static grub_size_t maximal_cmdline_size;
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#ifdef GRUB_MACHINE_EFI
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static grub_efi_uintn_t efi_mmap_size;
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#else
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static const grub_size_t efi_mmap_size = 0;
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#endif
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/* FIXME */
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#if 0
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struct idt_descriptor
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{
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grub_uint16_t limit;
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void *base;
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} __attribute__ ((packed));
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static struct idt_descriptor idt_desc =
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{
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0,
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0
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};
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#endif
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static inline grub_size_t
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page_align (grub_size_t size)
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{
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return (size + (1 << 12) - 1) & (~((1 << 12) - 1));
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}
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#ifdef GRUB_MACHINE_EFI
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/* Find the optimal number of pages for the memory map. Is it better to
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move this code to efi/mm.c? */
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static grub_efi_uintn_t
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find_efi_mmap_size (void)
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{
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static grub_efi_uintn_t mmap_size = 0;
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if (mmap_size != 0)
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return mmap_size;
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mmap_size = (1 << 12);
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while (1)
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{
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int ret;
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grub_efi_memory_descriptor_t *mmap;
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grub_efi_uintn_t desc_size;
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mmap = grub_malloc (mmap_size);
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if (! mmap)
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return 0;
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ret = grub_efi_get_memory_map (&mmap_size, mmap, 0, &desc_size, 0);
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grub_free (mmap);
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if (ret < 0)
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{
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grub_error (GRUB_ERR_IO, "cannot get memory map");
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return 0;
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}
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else if (ret > 0)
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break;
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mmap_size += (1 << 12);
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}
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/* Increase the size a bit for safety, because GRUB allocates more on
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later, and EFI itself may allocate more. */
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mmap_size += (1 << 12);
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mmap_size = page_align (mmap_size);
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return mmap_size;
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}
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#endif
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/* Find the optimal number of pages for the memory map. */
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static grub_size_t
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find_mmap_size (void)
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{
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grub_size_t count = 0, mmap_size;
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auto int NESTED_FUNC_ATTR hook (grub_uint64_t, grub_uint64_t,
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grub_memory_type_t);
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int NESTED_FUNC_ATTR hook (grub_uint64_t addr __attribute__ ((unused)),
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grub_uint64_t size __attribute__ ((unused)),
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grub_memory_type_t type __attribute__ ((unused)))
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{
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count++;
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return 0;
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}
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grub_mmap_iterate (hook);
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mmap_size = count * sizeof (struct grub_e820_mmap);
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/* Increase the size a bit for safety, because GRUB allocates more on
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later. */
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mmap_size += (1 << 12);
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return page_align (mmap_size);
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}
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static void
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free_pages (void)
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{
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grub_relocator_unload (relocator);
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relocator = NULL;
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real_mode_mem = prot_mode_mem = initrd_mem = 0;
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real_mode_target = prot_mode_target = initrd_mem_target = 0;
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}
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/* Allocate pages for the real mode code and the protected mode code
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for linux as well as a memory map buffer. */
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static grub_err_t
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allocate_pages (grub_size_t prot_size)
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{
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grub_size_t real_size, mmap_size;
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grub_err_t err;
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/* Make sure that each size is aligned to a page boundary. */
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real_size = GRUB_LINUX_CL_OFFSET + maximal_cmdline_size;
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prot_size = page_align (prot_size);
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mmap_size = find_mmap_size ();
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#ifdef GRUB_MACHINE_EFI
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efi_mmap_size = find_efi_mmap_size ();
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if (efi_mmap_size == 0)
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return grub_errno;
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#endif
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grub_dprintf ("linux", "real_size = %x, prot_size = %x, mmap_size = %x\n",
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(unsigned) real_size, (unsigned) prot_size, (unsigned) mmap_size);
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/* Calculate the number of pages; Combine the real mode code with
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the memory map buffer for simplicity. */
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real_mode_pages = ((real_size + mmap_size + efi_mmap_size) >> 12);
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prot_mode_pages = (prot_size >> 12);
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/* Initialize the memory pointers with NULL for convenience. */
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free_pages ();
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relocator = grub_relocator_new ();
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if (!relocator)
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{
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err = grub_errno;
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goto fail;
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}
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/* FIXME: Should request low memory from the heap when this feature is
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implemented. */
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auto int NESTED_FUNC_ATTR hook (grub_uint64_t, grub_uint64_t,
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grub_memory_type_t);
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int NESTED_FUNC_ATTR hook (grub_uint64_t addr, grub_uint64_t size,
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grub_memory_type_t type)
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{
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/* We must put real mode code in the traditional space. */
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if (type == GRUB_MEMORY_AVAILABLE
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&& addr <= 0x90000)
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{
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if (addr < 0x10000)
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{
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size += addr - 0x10000;
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addr = 0x10000;
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}
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if (addr + size > 0x90000)
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size = 0x90000 - addr;
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if (real_size + mmap_size + efi_mmap_size > size)
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return 0;
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real_mode_target = ((addr + size) - (real_size + mmap_size + efi_mmap_size));
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return 1;
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}
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return 0;
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}
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grub_mmap_iterate (hook);
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if (! real_mode_target)
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{
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err = grub_error (GRUB_ERR_OUT_OF_MEMORY, "cannot allocate real mode pages");
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goto fail;
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}
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{
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grub_relocator_chunk_t ch;
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err = grub_relocator_alloc_chunk_addr (relocator, &ch,
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real_mode_target,
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(real_size + mmap_size
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+ efi_mmap_size));
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if (err)
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goto fail;
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real_mode_mem = get_virtual_current_address (ch);
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}
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efi_mmap_buf = (grub_uint8_t *) real_mode_mem + real_size + mmap_size;
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prot_mode_target = GRUB_LINUX_BZIMAGE_ADDR;
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{
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grub_relocator_chunk_t ch;
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err = grub_relocator_alloc_chunk_addr (relocator, &ch,
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prot_mode_target, prot_size);
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if (err)
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goto fail;
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prot_mode_mem = get_virtual_current_address (ch);
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}
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grub_dprintf ("linux", "real_mode_mem = %lx, real_mode_pages = %x, "
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"prot_mode_mem = %lx, prot_mode_pages = %x\n",
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(unsigned long) real_mode_mem, (unsigned) real_mode_pages,
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(unsigned long) prot_mode_mem, (unsigned) prot_mode_pages);
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return GRUB_ERR_NONE;
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fail:
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free_pages ();
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return err;
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}
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static grub_err_t
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grub_e820_add_region (struct grub_e820_mmap *e820_map, int *e820_num,
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grub_uint64_t start, grub_uint64_t size,
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grub_uint32_t type)
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{
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int n = *e820_num;
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if (n >= GRUB_E820_MAX_ENTRY)
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{
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return grub_error (GRUB_ERR_OUT_OF_RANGE,
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"Too many e820 memory map entries");
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}
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if ((n > 0) && (e820_map[n - 1].addr + e820_map[n - 1].size == start) &&
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(e820_map[n - 1].type == type))
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e820_map[n - 1].size += size;
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else
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{
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e820_map[n].addr = start;
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e820_map[n].size = size;
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e820_map[n].type = type;
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(*e820_num)++;
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}
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return GRUB_ERR_NONE;
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}
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static grub_err_t
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grub_linux_setup_video (struct linux_kernel_params *params)
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{
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struct grub_video_mode_info mode_info;
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void *framebuffer;
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grub_err_t err;
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grub_video_driver_id_t driver_id;
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const char *gfxlfbvar = grub_env_get ("gfxpayloadforcelfb");
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driver_id = grub_video_get_driver_id ();
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if (driver_id == GRUB_VIDEO_DRIVER_NONE)
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return 1;
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err = grub_video_get_info_and_fini (&mode_info, &framebuffer);
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if (err)
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{
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grub_errno = GRUB_ERR_NONE;
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return 1;
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}
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params->lfb_width = mode_info.width;
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params->lfb_height = mode_info.height;
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params->lfb_depth = mode_info.bpp;
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params->lfb_line_len = mode_info.pitch;
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params->lfb_base = (grub_size_t) framebuffer;
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params->lfb_size = ALIGN_UP (params->lfb_line_len * params->lfb_height, 65536);
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params->red_mask_size = mode_info.red_mask_size;
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params->red_field_pos = mode_info.red_field_pos;
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params->green_mask_size = mode_info.green_mask_size;
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params->green_field_pos = mode_info.green_field_pos;
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params->blue_mask_size = mode_info.blue_mask_size;
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params->blue_field_pos = mode_info.blue_field_pos;
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params->reserved_mask_size = mode_info.reserved_mask_size;
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params->reserved_field_pos = mode_info.reserved_field_pos;
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if (gfxlfbvar && (gfxlfbvar[0] == '1' || gfxlfbvar[0] == 'y'))
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params->have_vga = GRUB_VIDEO_LINUX_TYPE_SIMPLE;
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else
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{
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switch (driver_id)
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{
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case GRUB_VIDEO_DRIVER_VBE:
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params->lfb_size >>= 16;
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params->have_vga = GRUB_VIDEO_LINUX_TYPE_VESA;
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break;
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case GRUB_VIDEO_DRIVER_EFI_UGA:
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case GRUB_VIDEO_DRIVER_EFI_GOP:
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params->have_vga = GRUB_VIDEO_LINUX_TYPE_EFIFB;
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break;
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/* FIXME: check if better id is available. */
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case GRUB_VIDEO_DRIVER_SM712:
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case GRUB_VIDEO_DRIVER_SIS315PRO:
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case GRUB_VIDEO_DRIVER_VGA:
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case GRUB_VIDEO_DRIVER_CIRRUS:
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case GRUB_VIDEO_DRIVER_BOCHS:
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case GRUB_VIDEO_DRIVER_RADEON_FULOONG2E:
|
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/* Make gcc happy. */
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case GRUB_VIDEO_DRIVER_SDL:
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case GRUB_VIDEO_DRIVER_NONE:
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params->have_vga = GRUB_VIDEO_LINUX_TYPE_SIMPLE;
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break;
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}
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}
|
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|
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#ifdef GRUB_MACHINE_PCBIOS
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/* VESA packed modes may come with zeroed mask sizes, which need
|
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to be set here according to DAC Palette width. If we don't,
|
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this results in Linux displaying a black screen. */
|
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if (driver_id == GRUB_VIDEO_DRIVER_VBE && mode_info.bpp <= 8)
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{
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struct grub_vbe_info_block controller_info;
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int status;
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int width = 8;
|
|
|
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status = grub_vbe_bios_get_controller_info (&controller_info);
|
|
|
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if (status == GRUB_VBE_STATUS_OK &&
|
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(controller_info.capabilities & GRUB_VBE_CAPABILITY_DACWIDTH))
|
|
status = grub_vbe_bios_set_dac_palette_width (&width);
|
|
|
|
if (status != GRUB_VBE_STATUS_OK)
|
|
/* 6 is default after mode reset. */
|
|
width = 6;
|
|
|
|
params->red_mask_size = params->green_mask_size
|
|
= params->blue_mask_size = width;
|
|
params->reserved_mask_size = 0;
|
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}
|
|
#endif
|
|
|
|
return GRUB_ERR_NONE;
|
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}
|
|
|
|
static grub_err_t
|
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grub_linux_boot (void)
|
|
{
|
|
struct linux_kernel_params *params;
|
|
int e820_num;
|
|
grub_err_t err = 0;
|
|
const char *modevar;
|
|
char *tmp;
|
|
struct grub_relocator32_state state;
|
|
|
|
params = real_mode_mem;
|
|
|
|
#ifdef GRUB_MACHINE_IEEE1275
|
|
{
|
|
const char *bootpath;
|
|
grub_ssize_t len;
|
|
|
|
bootpath = grub_env_get ("root");
|
|
if (bootpath)
|
|
grub_ieee1275_set_property (grub_ieee1275_chosen,
|
|
"bootpath", bootpath,
|
|
grub_strlen (bootpath) + 1,
|
|
&len);
|
|
}
|
|
#endif
|
|
|
|
grub_dprintf ("linux", "code32_start = %x\n",
|
|
(unsigned) params->code32_start);
|
|
|
|
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)
|
|
{
|
|
grub_uint32_t e820_type;
|
|
switch (type)
|
|
{
|
|
case GRUB_MEMORY_AVAILABLE:
|
|
e820_type = GRUB_E820_RAM;
|
|
break;
|
|
|
|
case GRUB_MEMORY_ACPI:
|
|
e820_type = GRUB_E820_ACPI;
|
|
break;
|
|
|
|
case GRUB_MEMORY_NVS:
|
|
e820_type = GRUB_E820_NVS;
|
|
break;
|
|
|
|
case GRUB_MEMORY_BADRAM:
|
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e820_type = GRUB_E820_BADRAM;
|
|
break;
|
|
|
|
default:
|
|
e820_type = GRUB_E820_RESERVED;
|
|
}
|
|
if (grub_e820_add_region (params->e820_map, &e820_num,
|
|
addr, size, e820_type))
|
|
return 1;
|
|
|
|
return 0;
|
|
}
|
|
|
|
e820_num = 0;
|
|
if (grub_mmap_iterate (hook))
|
|
return grub_errno;
|
|
params->mmap_size = e820_num;
|
|
|
|
modevar = grub_env_get ("gfxpayload");
|
|
|
|
/* Now all graphical modes are acceptable.
|
|
May change in future if we have modes without framebuffer. */
|
|
if (modevar && *modevar != 0)
|
|
{
|
|
tmp = grub_xasprintf ("%s;" DEFAULT_VIDEO_MODE, modevar);
|
|
if (! tmp)
|
|
return grub_errno;
|
|
#if ACCEPTS_PURE_TEXT
|
|
err = grub_video_set_mode (tmp, 0, 0);
|
|
#else
|
|
err = grub_video_set_mode (tmp, GRUB_VIDEO_MODE_TYPE_PURE_TEXT, 0);
|
|
#endif
|
|
grub_free (tmp);
|
|
}
|
|
else
|
|
{
|
|
#if ACCEPTS_PURE_TEXT
|
|
err = grub_video_set_mode (DEFAULT_VIDEO_MODE, 0, 0);
|
|
#else
|
|
err = grub_video_set_mode (DEFAULT_VIDEO_MODE,
|
|
GRUB_VIDEO_MODE_TYPE_PURE_TEXT, 0);
|
|
#endif
|
|
}
|
|
if (err)
|
|
{
|
|
grub_print_error ();
|
|
grub_printf ("Booting however\n");
|
|
grub_errno = GRUB_ERR_NONE;
|
|
}
|
|
|
|
if (grub_linux_setup_video (params))
|
|
{
|
|
#if defined (GRUB_MACHINE_PCBIOS) || defined (GRUB_MACHINE_COREBOOT) || defined (GRUB_MACHINE_QEMU)
|
|
params->have_vga = GRUB_VIDEO_LINUX_TYPE_TEXT;
|
|
params->video_mode = 0x3;
|
|
#else
|
|
params->have_vga = 0;
|
|
params->video_mode = 0;
|
|
params->video_width = 0;
|
|
params->video_height = 0;
|
|
#endif
|
|
}
|
|
|
|
/* Initialize these last, because terminal position could be affected by printfs above. */
|
|
#ifndef GRUB_MACHINE_IEEE1275
|
|
if (params->have_vga == GRUB_VIDEO_LINUX_TYPE_TEXT)
|
|
#endif
|
|
{
|
|
grub_term_output_t term;
|
|
int found = 0;
|
|
FOR_ACTIVE_TERM_OUTPUTS(term)
|
|
if (grub_strcmp (term->name, "vga_text") == 0
|
|
|| grub_strcmp (term->name, "console") == 0
|
|
|| grub_strcmp (term->name, "ofconsole") == 0)
|
|
{
|
|
grub_uint16_t pos = grub_term_getxy (term);
|
|
params->video_cursor_x = pos >> 8;
|
|
params->video_cursor_y = pos & 0xff;
|
|
params->video_width = grub_term_width (term);
|
|
params->video_height = grub_term_height (term);
|
|
found = 1;
|
|
break;
|
|
}
|
|
if (!found)
|
|
{
|
|
params->video_cursor_x = 0;
|
|
params->video_cursor_y = 0;
|
|
params->video_width = 80;
|
|
params->video_height = 25;
|
|
}
|
|
}
|
|
|
|
#ifdef GRUB_MACHINE_IEEE1275
|
|
{
|
|
params->ofw_signature = GRUB_LINUX_OFW_SIGNATURE;
|
|
params->ofw_num_items = 1;
|
|
params->ofw_cif_handler = (grub_uint32_t) grub_ieee1275_entry_fn;
|
|
params->ofw_idt = 0;
|
|
}
|
|
#endif
|
|
|
|
#ifdef GRUB_MACHINE_EFI
|
|
{
|
|
grub_efi_uintn_t efi_desc_size;
|
|
grub_size_t efi_mmap_target;
|
|
grub_efi_uint32_t efi_desc_version;
|
|
err = grub_efi_finish_boot_services (&efi_mmap_size, efi_mmap_buf, NULL,
|
|
&efi_desc_size, &efi_desc_version);
|
|
if (err)
|
|
return err;
|
|
|
|
/* Note that no boot services are available from here. */
|
|
efi_mmap_target = real_mode_target
|
|
+ ((grub_uint8_t *) efi_mmap_buf - (grub_uint8_t *) real_mode_mem);
|
|
/* Pass EFI parameters. */
|
|
if (grub_le_to_cpu16 (params->version) >= 0x0206)
|
|
{
|
|
params->v0206.efi_mem_desc_size = efi_desc_size;
|
|
params->v0206.efi_mem_desc_version = efi_desc_version;
|
|
params->v0206.efi_mmap = efi_mmap_target;
|
|
params->v0206.efi_mmap_size = efi_mmap_size;
|
|
#ifdef __x86_64__
|
|
params->v0206.efi_mmap_hi = (efi_mmap_target >> 32);
|
|
#endif
|
|
}
|
|
else if (grub_le_to_cpu16 (params->version) >= 0x0204)
|
|
{
|
|
params->v0204.efi_mem_desc_size = efi_desc_size;
|
|
params->v0204.efi_mem_desc_version = efi_desc_version;
|
|
params->v0204.efi_mmap = efi_mmap_target;
|
|
params->v0204.efi_mmap_size = efi_mmap_size;
|
|
}
|
|
}
|
|
#endif
|
|
|
|
/* FIXME. */
|
|
/* asm volatile ("lidt %0" : : "m" (idt_desc)); */
|
|
state.ebp = state.edi = state.ebx = 0;
|
|
state.esi = real_mode_target;
|
|
state.esp = real_mode_target;
|
|
state.eip = params->code32_start;
|
|
return grub_relocator32_boot (relocator, state);
|
|
}
|
|
|
|
static grub_err_t
|
|
grub_linux_unload (void)
|
|
{
|
|
grub_dl_unref (my_mod);
|
|
loaded = 0;
|
|
return GRUB_ERR_NONE;
|
|
}
|
|
|
|
static grub_err_t
|
|
grub_cmd_linux (grub_command_t cmd __attribute__ ((unused)),
|
|
int argc, char *argv[])
|
|
{
|
|
grub_file_t file = 0;
|
|
struct linux_kernel_header lh;
|
|
struct linux_kernel_params *params;
|
|
grub_uint8_t setup_sects;
|
|
grub_size_t real_size, prot_size;
|
|
grub_ssize_t len;
|
|
int i;
|
|
|
|
grub_dl_ref (my_mod);
|
|
|
|
if (argc == 0)
|
|
{
|
|
grub_error (GRUB_ERR_BAD_ARGUMENT, "no kernel specified");
|
|
goto fail;
|
|
}
|
|
|
|
file = grub_file_open (argv[0]);
|
|
if (! file)
|
|
goto fail;
|
|
|
|
if (grub_file_read (file, &lh, sizeof (lh)) != sizeof (lh))
|
|
{
|
|
grub_error (GRUB_ERR_READ_ERROR, "cannot read the Linux header");
|
|
goto fail;
|
|
}
|
|
|
|
if (lh.boot_flag != grub_cpu_to_le16 (0xaa55))
|
|
{
|
|
grub_error (GRUB_ERR_BAD_OS, "invalid magic number");
|
|
goto fail;
|
|
}
|
|
|
|
if (lh.setup_sects > GRUB_LINUX_MAX_SETUP_SECTS)
|
|
{
|
|
grub_error (GRUB_ERR_BAD_OS, "too many setup sectors");
|
|
goto fail;
|
|
}
|
|
|
|
if (! (lh.loadflags & GRUB_LINUX_FLAG_BIG_KERNEL))
|
|
{
|
|
grub_error (GRUB_ERR_BAD_OS, "zImage doesn't support 32-bit boot"
|
|
#ifdef GRUB_MACHINE_PCBIOS
|
|
" (try with `linux16')"
|
|
#endif
|
|
);
|
|
goto fail;
|
|
}
|
|
|
|
/* FIXME: 2.03 is not always good enough (Linux 2.4 can be 2.03 and
|
|
still not support 32-bit boot. */
|
|
if (lh.header != grub_cpu_to_le32 (GRUB_LINUX_MAGIC_SIGNATURE)
|
|
|| grub_le_to_cpu16 (lh.version) < 0x0203)
|
|
{
|
|
grub_error (GRUB_ERR_BAD_OS, "version too old for 32-bit boot"
|
|
#ifdef GRUB_MACHINE_PCBIOS
|
|
" (try with `linux16')"
|
|
#endif
|
|
);
|
|
goto fail;
|
|
}
|
|
|
|
if (grub_le_to_cpu16 (lh.version) >= 0x0206)
|
|
maximal_cmdline_size = grub_le_to_cpu32 (lh.cmdline_size) + 1;
|
|
else
|
|
maximal_cmdline_size = 256;
|
|
|
|
if (maximal_cmdline_size < 128)
|
|
maximal_cmdline_size = 128;
|
|
|
|
setup_sects = lh.setup_sects;
|
|
|
|
/* If SETUP_SECTS is not set, set it to the default (4). */
|
|
if (! setup_sects)
|
|
setup_sects = GRUB_LINUX_DEFAULT_SETUP_SECTS;
|
|
|
|
real_size = setup_sects << GRUB_DISK_SECTOR_BITS;
|
|
prot_size = grub_file_size (file) - real_size - GRUB_DISK_SECTOR_SIZE;
|
|
|
|
if (allocate_pages (prot_size))
|
|
goto fail;
|
|
|
|
params = (struct linux_kernel_params *) real_mode_mem;
|
|
grub_memset (params, 0, GRUB_LINUX_CL_OFFSET + maximal_cmdline_size);
|
|
grub_memcpy (¶ms->setup_sects, &lh.setup_sects, sizeof (lh) - 0x1F1);
|
|
|
|
params->ps_mouse = params->padding10 = 0;
|
|
|
|
len = 0x400 - sizeof (lh);
|
|
if (grub_file_read (file, (char *) real_mode_mem + sizeof (lh), len) != len)
|
|
{
|
|
grub_error (GRUB_ERR_FILE_READ_ERROR, "couldn't read file");
|
|
goto fail;
|
|
}
|
|
|
|
params->type_of_loader = GRUB_LINUX_BOOT_LOADER_TYPE;
|
|
|
|
/* These two are used (instead of cmd_line_ptr) by older versions of Linux,
|
|
and otherwise ignored. */
|
|
params->cl_magic = GRUB_LINUX_CL_MAGIC;
|
|
params->cl_offset = 0x1000;
|
|
|
|
params->cmd_line_ptr = real_mode_target + 0x1000;
|
|
params->ramdisk_image = 0;
|
|
params->ramdisk_size = 0;
|
|
|
|
params->heap_end_ptr = GRUB_LINUX_HEAP_END_OFFSET;
|
|
params->loadflags |= GRUB_LINUX_FLAG_CAN_USE_HEAP;
|
|
|
|
/* These are not needed to be precise, because Linux uses these values
|
|
only to raise an error when the decompression code cannot find good
|
|
space. */
|
|
params->ext_mem = ((32 * 0x100000) >> 10);
|
|
params->alt_mem = ((32 * 0x100000) >> 10);
|
|
|
|
/* Ignored by Linux. */
|
|
params->video_page = 0;
|
|
|
|
/* Only used when `video_mode == 0x7', otherwise ignored. */
|
|
params->video_ega_bx = 0;
|
|
|
|
params->font_size = 16; /* XXX */
|
|
|
|
#ifdef GRUB_MACHINE_EFI
|
|
if (grub_le_to_cpu16 (params->version) >= 0x0206)
|
|
{
|
|
params->v0206.efi_signature = GRUB_LINUX_EFI_SIGNATURE;
|
|
params->v0206.efi_system_table = (grub_uint32_t) (unsigned long) grub_efi_system_table;
|
|
#ifdef __x86_64__
|
|
params->v0206.efi_system_table_hi = (grub_uint32_t) ((grub_uint64_t) grub_efi_system_table >> 32);
|
|
#endif
|
|
}
|
|
else if (grub_le_to_cpu16 (params->version) >= 0x0204)
|
|
{
|
|
params->v0204.efi_signature = GRUB_LINUX_EFI_SIGNATURE_0204;
|
|
params->v0204.efi_system_table = (grub_uint32_t) (unsigned long) grub_efi_system_table;
|
|
}
|
|
#endif
|
|
|
|
/* The other parameters are filled when booting. */
|
|
|
|
grub_file_seek (file, real_size + GRUB_DISK_SECTOR_SIZE);
|
|
|
|
grub_dprintf ("linux", "bzImage, setup=0x%x, size=0x%x\n",
|
|
(unsigned) real_size, (unsigned) prot_size);
|
|
|
|
/* Look for memory size and video mode specified on the command line. */
|
|
linux_mem_size = 0;
|
|
for (i = 1; i < argc; i++)
|
|
#ifdef GRUB_MACHINE_PCBIOS
|
|
if (grub_memcmp (argv[i], "vga=", 4) == 0)
|
|
{
|
|
/* Video mode selection support. */
|
|
char *val = argv[i] + 4;
|
|
unsigned vid_mode = GRUB_LINUX_VID_MODE_NORMAL;
|
|
struct grub_vesa_mode_table_entry *linux_mode;
|
|
grub_err_t err;
|
|
char *buf;
|
|
|
|
grub_dl_load ("vbe");
|
|
|
|
if (grub_strcmp (val, "normal") == 0)
|
|
vid_mode = GRUB_LINUX_VID_MODE_NORMAL;
|
|
else if (grub_strcmp (val, "ext") == 0)
|
|
vid_mode = GRUB_LINUX_VID_MODE_EXTENDED;
|
|
else if (grub_strcmp (val, "ask") == 0)
|
|
{
|
|
grub_printf ("Legacy `ask' parameter no longer supported.\n");
|
|
|
|
/* We usually would never do this in a loader, but "vga=ask" means user
|
|
requested interaction, so it can't hurt to request keyboard input. */
|
|
grub_wait_after_message ();
|
|
|
|
goto fail;
|
|
}
|
|
else
|
|
vid_mode = (grub_uint16_t) grub_strtoul (val, 0, 0);
|
|
|
|
switch (vid_mode)
|
|
{
|
|
case 0:
|
|
case GRUB_LINUX_VID_MODE_NORMAL:
|
|
grub_env_set ("gfxpayload", "text");
|
|
grub_printf ("%s is deprecated. "
|
|
"Use set gfxpayload=text before "
|
|
"linux command instead.\n",
|
|
argv[i]);
|
|
break;
|
|
|
|
case 1:
|
|
case GRUB_LINUX_VID_MODE_EXTENDED:
|
|
/* FIXME: support 80x50 text. */
|
|
grub_env_set ("gfxpayload", "text");
|
|
grub_printf ("%s is deprecated. "
|
|
"Use set gfxpayload=text before "
|
|
"linux command instead.\n",
|
|
argv[i]);
|
|
break;
|
|
default:
|
|
/* Ignore invalid values. */
|
|
if (vid_mode < GRUB_VESA_MODE_TABLE_START ||
|
|
vid_mode > GRUB_VESA_MODE_TABLE_END)
|
|
{
|
|
grub_env_set ("gfxpayload", "text");
|
|
grub_printf ("%s is deprecated. Mode %d isn't recognized. "
|
|
"Use set gfxpayload=WIDTHxHEIGHT[xDEPTH] before "
|
|
"linux command instead.\n",
|
|
argv[i], vid_mode);
|
|
break;
|
|
}
|
|
|
|
linux_mode = &grub_vesa_mode_table[vid_mode
|
|
- GRUB_VESA_MODE_TABLE_START];
|
|
|
|
buf = grub_xasprintf ("%ux%ux%u,%ux%u",
|
|
linux_mode->width, linux_mode->height,
|
|
linux_mode->depth,
|
|
linux_mode->width, linux_mode->height);
|
|
if (! buf)
|
|
goto fail;
|
|
|
|
grub_printf ("%s is deprecated. "
|
|
"Use set gfxpayload=%s before "
|
|
"linux command instead.\n",
|
|
argv[i], buf);
|
|
err = grub_env_set ("gfxpayload", buf);
|
|
grub_free (buf);
|
|
if (err)
|
|
goto fail;
|
|
}
|
|
}
|
|
else
|
|
#endif /* GRUB_MACHINE_PCBIOS */
|
|
if (grub_memcmp (argv[i], "mem=", 4) == 0)
|
|
{
|
|
char *val = argv[i] + 4;
|
|
|
|
linux_mem_size = grub_strtoul (val, &val, 0);
|
|
|
|
if (grub_errno)
|
|
{
|
|
grub_errno = GRUB_ERR_NONE;
|
|
linux_mem_size = 0;
|
|
}
|
|
else
|
|
{
|
|
int shift = 0;
|
|
|
|
switch (grub_tolower (val[0]))
|
|
{
|
|
case 'g':
|
|
shift += 10;
|
|
case 'm':
|
|
shift += 10;
|
|
case 'k':
|
|
shift += 10;
|
|
default:
|
|
break;
|
|
}
|
|
|
|
/* Check an overflow. */
|
|
if (linux_mem_size > (~0UL >> shift))
|
|
linux_mem_size = 0;
|
|
else
|
|
linux_mem_size <<= shift;
|
|
}
|
|
}
|
|
else if (grub_memcmp (argv[i], "quiet", sizeof ("quiet") - 1) == 0)
|
|
{
|
|
params->loadflags |= GRUB_LINUX_FLAG_QUIET;
|
|
}
|
|
|
|
/* Create kernel command line. */
|
|
grub_memcpy ((char *)real_mode_mem + GRUB_LINUX_CL_OFFSET, LINUX_IMAGE,
|
|
sizeof (LINUX_IMAGE));
|
|
grub_create_loader_cmdline (argc, argv,
|
|
(char *)real_mode_mem + GRUB_LINUX_CL_OFFSET
|
|
+ sizeof (LINUX_IMAGE) - 1,
|
|
maximal_cmdline_size
|
|
- (sizeof (LINUX_IMAGE) - 1));
|
|
|
|
len = prot_size;
|
|
if (grub_file_read (file, prot_mode_mem, len) != len)
|
|
grub_error (GRUB_ERR_FILE_READ_ERROR, "couldn't read file");
|
|
|
|
if (grub_errno == GRUB_ERR_NONE)
|
|
{
|
|
grub_loader_set (grub_linux_boot, grub_linux_unload,
|
|
0 /* set noreturn=0 in order to avoid grub_console_fini() */);
|
|
loaded = 1;
|
|
}
|
|
|
|
fail:
|
|
|
|
if (file)
|
|
grub_file_close (file);
|
|
|
|
if (grub_errno != GRUB_ERR_NONE)
|
|
{
|
|
grub_dl_unref (my_mod);
|
|
loaded = 0;
|
|
}
|
|
|
|
return grub_errno;
|
|
}
|
|
|
|
static grub_err_t
|
|
grub_cmd_initrd (grub_command_t cmd __attribute__ ((unused)),
|
|
int argc, char *argv[])
|
|
{
|
|
grub_file_t file = 0;
|
|
grub_ssize_t size;
|
|
grub_addr_t addr_min, addr_max;
|
|
grub_addr_t addr;
|
|
grub_err_t err;
|
|
struct linux_kernel_header *lh;
|
|
|
|
if (argc == 0)
|
|
{
|
|
grub_error (GRUB_ERR_BAD_ARGUMENT, "no module specified");
|
|
goto fail;
|
|
}
|
|
|
|
if (! loaded)
|
|
{
|
|
grub_error (GRUB_ERR_BAD_ARGUMENT, "you need to load the kernel first");
|
|
goto fail;
|
|
}
|
|
|
|
grub_file_filter_disable_compression ();
|
|
file = grub_file_open (argv[0]);
|
|
if (! file)
|
|
goto fail;
|
|
|
|
size = grub_file_size (file);
|
|
initrd_pages = (page_align (size) >> 12);
|
|
|
|
lh = (struct linux_kernel_header *) real_mode_mem;
|
|
|
|
/* Get the highest address available for the initrd. */
|
|
if (grub_le_to_cpu16 (lh->version) >= 0x0203)
|
|
{
|
|
addr_max = grub_cpu_to_le32 (lh->initrd_addr_max);
|
|
|
|
/* XXX in reality, Linux specifies a bogus value, so
|
|
it is necessary to make sure that ADDR_MAX does not exceed
|
|
0x3fffffff. */
|
|
if (addr_max > GRUB_LINUX_INITRD_MAX_ADDRESS)
|
|
addr_max = GRUB_LINUX_INITRD_MAX_ADDRESS;
|
|
}
|
|
else
|
|
addr_max = GRUB_LINUX_INITRD_MAX_ADDRESS;
|
|
|
|
if (linux_mem_size != 0 && linux_mem_size < addr_max)
|
|
addr_max = linux_mem_size;
|
|
|
|
/* Linux 2.3.xx has a bug in the memory range check, so avoid
|
|
the last page.
|
|
Linux 2.2.xx has a bug in the memory range check, which is
|
|
worse than that of Linux 2.3.xx, so avoid the last 64kb. */
|
|
addr_max -= 0x10000;
|
|
|
|
/* Usually, the compression ratio is about 50%. */
|
|
addr_min = (grub_addr_t) prot_mode_target + ((prot_mode_pages * 3) << 12)
|
|
+ page_align (size);
|
|
|
|
/* Put the initrd as high as possible, 4KiB aligned. */
|
|
addr = (addr_max - size) & ~0xFFF;
|
|
|
|
if (addr < addr_min)
|
|
{
|
|
grub_error (GRUB_ERR_OUT_OF_RANGE, "the initrd is too big");
|
|
goto fail;
|
|
}
|
|
|
|
{
|
|
grub_relocator_chunk_t ch;
|
|
err = grub_relocator_alloc_chunk_align (relocator, &ch,
|
|
addr_min, addr, size, 0x1000,
|
|
GRUB_RELOCATOR_PREFERENCE_HIGH);
|
|
if (err)
|
|
return err;
|
|
initrd_mem = get_virtual_current_address (ch);
|
|
initrd_mem_target = get_physical_target_address (ch);
|
|
}
|
|
|
|
if (grub_file_read (file, initrd_mem, size) != size)
|
|
{
|
|
grub_error (GRUB_ERR_FILE_READ_ERROR, "couldn't read file");
|
|
goto fail;
|
|
}
|
|
|
|
grub_dprintf ("linux", "Initrd, addr=0x%x, size=0x%x\n",
|
|
(unsigned) addr, (unsigned) size);
|
|
|
|
lh->ramdisk_image = initrd_mem_target;
|
|
lh->ramdisk_size = size;
|
|
lh->root_dev = 0x0100; /* XXX */
|
|
|
|
fail:
|
|
if (file)
|
|
grub_file_close (file);
|
|
|
|
return grub_errno;
|
|
}
|
|
|
|
static grub_command_t cmd_linux, cmd_initrd;
|
|
|
|
GRUB_MOD_INIT(linux)
|
|
{
|
|
cmd_linux = grub_register_command ("linux", grub_cmd_linux,
|
|
0, N_("Load Linux."));
|
|
cmd_initrd = grub_register_command ("initrd", grub_cmd_initrd,
|
|
0, N_("Load initrd."));
|
|
my_mod = mod;
|
|
}
|
|
|
|
GRUB_MOD_FINI(linux)
|
|
{
|
|
grub_unregister_command (cmd_linux);
|
|
grub_unregister_command (cmd_initrd);
|
|
}
|