150 lines
2.8 KiB
ArmAsm
150 lines
2.8 KiB
ArmAsm
/*
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* GRUB -- GRand Unified Bootloader
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* Copyright (C) 2013 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/symbol.h>
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#include <grub/xen.h>
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.p2align 4 /* force 16-byte alignment */
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VARIABLE(grub_relocator_xen_remap_start)
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LOCAL(base):
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/* mov imm32, %ebx */
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.byte 0xbb
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VARIABLE(grub_relocator_xen_remapper_virt)
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.long 0
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/* mov imm32, %ecx */
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.byte 0xb9
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VARIABLE(grub_relocator_xen_remapper_map)
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.long 0
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/* mov imm32, %edx */
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.byte 0xba
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VARIABLE(grub_relocator_xen_remapper_map_high)
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.long 0
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movl %ebx, %ebp
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movl $2, %esi
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movl $__HYPERVISOR_update_va_mapping, %eax
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int $0x82
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movl %ebp, %ebx
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addl $(LOCAL(cont) - LOCAL(base)), %ebx
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jmp *%ebx
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LOCAL(cont):
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xorl %eax, %eax
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movl %eax, %ebp
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1:
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/* mov imm32, %eax */
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.byte 0xb8
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VARIABLE(grub_relocator_xen_mfn_list)
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.long 0
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movl %eax, %edi
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movl %ebp, %eax
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movl 0(%edi, %eax, 4), %ecx
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/* mov imm32, %ebx */
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.byte 0xbb
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VARIABLE(grub_relocator_xen_paging_start)
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.long 0
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shll $12, %eax
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addl %eax, %ebx
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movl %ecx, %edx
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shll $12, %ecx
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shrl $20, %edx
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orl $5, %ecx
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movl $2, %esi
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movl $__HYPERVISOR_update_va_mapping, %eax
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int $0x82
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incl %ebp
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/* mov imm32, %ecx */
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.byte 0xb9
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VARIABLE(grub_relocator_xen_paging_size)
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.long 0
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cmpl %ebp, %ecx
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ja 1b
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/* mov imm32, %ebx */
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.byte 0xbb
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VARIABLE(grub_relocator_xen_mmu_op_addr)
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.long 0
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movl $3, %ecx
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movl $0, %edx
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movl $0x7FF0, %esi
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movl $__HYPERVISOR_mmuext_op, %eax
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int $0x82
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/* mov imm32, %eax */
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.byte 0xb8
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VARIABLE(grub_relocator_xen_remap_continue)
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.long 0
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jmp *%eax
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VARIABLE(grub_relocator_xen_mmu_op)
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.space 256
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VARIABLE(grub_relocator_xen_remap_end)
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VARIABLE(grub_relocator_xen_start)
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/* mov imm32, %eax */
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.byte 0xb8
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VARIABLE(grub_relocator_xen_remapper_virt2)
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.long 0
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movl %eax, %edi
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xorl %ecx, %ecx
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xorl %edx, %edx
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movl $2, %esi
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movl $__HYPERVISOR_update_va_mapping, %eax
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int $0x82
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/* mov imm32, %eax */
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.byte 0xb8
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VARIABLE(grub_relocator_xen_stack)
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.long 0
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movl %eax, %esp
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/* mov imm32, %eax */
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.byte 0xb8
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VARIABLE(grub_relocator_xen_start_info)
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.long 0
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movl %eax, %esi
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cld
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/* mov imm32, %eax */
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.byte 0xb8
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VARIABLE(grub_relocator_xen_entry_point)
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.long 0
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jmp *%eax
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VARIABLE(grub_relocator_xen_end)
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