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a927cc7383
* loader/i386/pc/multiboot.c (playground, forward_relocator)
(backward_relocator): New variables. Used to allocate and relocate
the payload, respectively.
(grub_multiboot_load_elf32): Load into heap instead of requested
address, install the appropiate relocator code in each bound of
the payload, and set the entry point such that
grub_multiboot_real_boot() will jump to one of them.
* kern/i386/loader.S (grub_multiboot_payload_size)
(grub_multiboot_payload_orig, grub_multiboot_payload_dest)
(grub_multiboot_payload_entry_offset): New variables.
(grub_multiboot_real_boot): Set cpu context to what the relocator
expects, and jump to the relocator instead of the payload.
* include/grub/i386/loader.h (grub_multiboot_payload_size)
(grub_multiboot_payload_orig, grub_multiboot_payload_dest)
(grub_multiboot_payload_entry_offset): Export.
57 lines
2.2 KiB
C
57 lines
2.2 KiB
C
/*
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* GRUB -- GRand Unified Bootloader
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* Copyright (C) 2002,2003,2004,2007,2008 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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#ifndef GRUB_LOADER_CPU_HEADER
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#define GRUB_LOADER_CPU_HEADER 1
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#include <grub/types.h>
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#include <grub/err.h>
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#include <grub/symbol.h>
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#include <grub/multiboot.h>
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extern grub_uint32_t EXPORT_VAR(grub_linux_prot_size);
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extern char *EXPORT_VAR(grub_linux_tmp_addr);
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extern char *EXPORT_VAR(grub_linux_real_addr);
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extern grub_int32_t EXPORT_VAR(grub_linux_is_bzimage);
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extern grub_addr_t EXPORT_VAR(grub_os_area_addr);
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extern grub_size_t EXPORT_VAR(grub_os_area_size);
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grub_err_t EXPORT_FUNC(grub_linux_boot) (void);
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/* The asm part of the multiboot loader. */
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void EXPORT_FUNC(grub_multiboot_real_boot) (grub_addr_t entry,
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struct grub_multiboot_info *mbi)
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__attribute__ ((noreturn));
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void EXPORT_FUNC(grub_multiboot2_real_boot) (grub_addr_t entry,
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struct grub_multiboot_info *mbi)
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__attribute__ ((noreturn));
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void EXPORT_FUNC(grub_unix_real_boot) (grub_addr_t entry, ...)
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__attribute__ ((cdecl,noreturn));
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extern grub_addr_t EXPORT_VAR(grub_multiboot_payload_orig);
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extern grub_addr_t EXPORT_VAR(grub_multiboot_payload_dest);
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extern grub_size_t EXPORT_VAR(grub_multiboot_payload_size);
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extern grub_uint32_t EXPORT_VAR(grub_multiboot_payload_entry_offset);
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/* It is necessary to export these functions, because normal mode commands
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reuse rescue mode commands. */
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void grub_rescue_cmd_linux (int argc, char *argv[]);
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void grub_rescue_cmd_initrd (int argc, char *argv[]);
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#endif /* ! GRUB_LOADER_CPU_HEADER */
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