104 lines
3.5 KiB
C
104 lines
3.5 KiB
C
/*
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* GRUB -- GRand Unified Bootloader
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* Copyright (C) 2009 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/mm.h>
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#include <grub/misc.h>
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#include <grub/types.h>
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#include <grub/types.h>
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#include <grub/err.h>
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#include <grub/i386/relocator.h>
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extern grub_uint8_t grub_relocator32_forward_start;
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extern grub_uint8_t grub_relocator32_forward_end;
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extern grub_uint8_t grub_relocator32_backward_start;
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extern grub_uint8_t grub_relocator32_backward_end;
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extern grub_uint32_t grub_relocator32_backward_dest;
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extern grub_uint32_t grub_relocator32_backward_size;
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extern grub_addr_t grub_relocator32_backward_src;
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extern grub_uint32_t grub_relocator32_forward_dest;
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extern grub_uint32_t grub_relocator32_forward_size;
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extern grub_addr_t grub_relocator32_forward_src;
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extern grub_uint32_t grub_relocator32_forward_eax;
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extern grub_uint32_t grub_relocator32_forward_ebx;
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extern grub_uint32_t grub_relocator32_forward_ecx;
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extern grub_uint32_t grub_relocator32_forward_edx;
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extern grub_uint32_t grub_relocator32_forward_eip;
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extern grub_uint32_t grub_relocator32_forward_esp;
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extern grub_uint32_t grub_relocator32_backward_eax;
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extern grub_uint32_t grub_relocator32_backward_ebx;
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extern grub_uint32_t grub_relocator32_backward_ecx;
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extern grub_uint32_t grub_relocator32_backward_edx;
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extern grub_uint32_t grub_relocator32_backward_eip;
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extern grub_uint32_t grub_relocator32_backward_esp;
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#define RELOCATOR_SIZEOF(x) (&grub_relocator32_##x##_end - &grub_relocator32_##x##_start)
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#define RELOCATOR_ALIGN 16
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#define PREFIX(x) grub_relocator32_ ## x
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static void
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write_relocator_bw (void *ptr, void *src, grub_uint32_t dest,
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grub_size_t size, struct grub_relocator32_state state)
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{
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void (*entry) ();
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grub_relocator32_backward_dest = dest;
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grub_relocator32_backward_src = PTR_TO_UINT64 (src);
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grub_relocator32_backward_size = size;
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grub_relocator32_backward_eax = state.eax;
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grub_relocator32_backward_ebx = state.ebx;
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grub_relocator32_backward_ecx = state.ecx;
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grub_relocator32_backward_edx = state.edx;
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grub_relocator32_backward_eip = state.eip;
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grub_relocator32_backward_esp = state.esp;
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grub_memmove (ptr,
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&grub_relocator32_backward_start,
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RELOCATOR_SIZEOF (backward));
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entry = (void (*)()) (ptr);
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entry ();
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}
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static void
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write_relocator_bw (void *ptr, void *src, grub_uint32_t dest,
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grub_size_t size, struct grub_relocator32_state state)
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{
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grub_relocator32_forward_dest = dest;
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grub_relocator32_forward_src = PTR_TO_UINT64 (src);
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grub_relocator32_forward_size = size;
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grub_relocator32_forward_eax = state.eax;
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grub_relocator32_forward_ebx = state.ebx;
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grub_relocator32_forward_ecx = state.ecx;
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grub_relocator32_forward_edx = state.edx;
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grub_relocator32_forward_eip = state.eip;
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grub_relocator32_forward_esp = state.esp;
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grub_memmove (ptr,
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&grub_relocator32_forward_start,
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RELOCATOR_SIZEOF (forward));
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entry = (void (*)()) ptr;
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entry ();
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}
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