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