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/* Load runtime image of EFIemu. Functions common to 32/64-bit mode */
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* GRUB -- GRand Unified Bootloader
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* Copyright (C) 2009 Free Software Foundation, Inc.
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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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* 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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* 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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#include <grub/file.h>
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#include <grub/misc.h>
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#include <grub/efiemu/efiemu.h>
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#include <grub/cpu/efiemu.h>
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/* Are we in 32 or 64-bit mode?*/
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static grub_efiemu_mode_t grub_efiemu_mode = GRUB_EFIEMU_NOTLOADED;
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/* Runtime ELF file */
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static grub_ssize_t efiemu_core_size;
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static void *efiemu_core = 0;
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/* Linked list of segments */
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static grub_efiemu_segment_t efiemu_segments = 0;
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/* equivalent to sizeof (grub_efi_uintn_t) but taking the mode into account*/
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grub_efiemu_sizeof_uintn_t (void)
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if (grub_efiemu_mode == GRUB_EFIEMU32)
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if (grub_efiemu_mode == GRUB_EFIEMU64)
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/* Check the header and set mode */
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grub_efiemu_check_header (void *ehdr, grub_size_t size,
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grub_efiemu_mode_t *mode)
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/* Check the magic numbers. */
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if ((*mode == GRUB_EFIEMU_NOTLOADED || *mode == GRUB_EFIEMU32)
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&& grub_efiemu_check_header32 (ehdr,size))
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*mode = GRUB_EFIEMU32;
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if ((*mode == GRUB_EFIEMU_NOTLOADED || *mode == GRUB_EFIEMU64)
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&& grub_efiemu_check_header64 (ehdr,size))
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*mode = GRUB_EFIEMU64;
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return grub_error (GRUB_ERR_BAD_OS, "invalid ELF magic");
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grub_efiemu_unload_segs (grub_efiemu_segment_t seg)
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grub_efiemu_segment_t segn;
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for (; seg; seg = segn)
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grub_efiemu_mm_return_request (seg->handle);
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grub_efiemu_loadcore_unload(void)
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switch (grub_efiemu_mode)
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grub_efiemu_loadcore_unload32 ();
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grub_efiemu_loadcore_unload64 ();
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grub_efiemu_mode = GRUB_EFIEMU_NOTLOADED;
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grub_free (efiemu_core);
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grub_efiemu_unload_segs (efiemu_segments);
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grub_efiemu_free_syms ();
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return GRUB_ERR_NONE;
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/* Load runtime file and do some initial preparations */
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grub_efiemu_loadcore_init (grub_file_t file)
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efiemu_core_size = grub_file_size (file);
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efiemu_core = grub_malloc (efiemu_core_size);
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if (grub_file_read (file, efiemu_core, efiemu_core_size)
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!= (int) efiemu_core_size)
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grub_free (efiemu_core);
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if (grub_efiemu_check_header (efiemu_core, efiemu_core_size,
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grub_free (efiemu_core);
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return GRUB_ERR_BAD_MODULE;
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switch (grub_efiemu_mode)
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if ((err = grub_efiemu_loadcore_init32 (efiemu_core, efiemu_core_size,
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grub_free (efiemu_core);
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grub_efiemu_mode = GRUB_EFIEMU_NOTLOADED;
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if ((err = grub_efiemu_loadcore_init64 (efiemu_core, efiemu_core_size,
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grub_free (efiemu_core);
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grub_efiemu_mode = GRUB_EFIEMU_NOTLOADED;
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return grub_error (GRUB_ERR_BAD_OS, "unknown EFI runtime");
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return GRUB_ERR_NONE;
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grub_efiemu_loadcore_load (void)
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switch (grub_efiemu_mode)
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if ((err = grub_efiemu_loadcore_load32 (efiemu_core, efiemu_core_size,
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grub_efiemu_loadcore_unload ();
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if ((err = grub_efiemu_loadcore_load64 (efiemu_core, efiemu_core_size,
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grub_efiemu_loadcore_unload ();
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return grub_error (GRUB_ERR_BAD_OS, "unknown EFI runtime");