Add new ports: i386-xen and x86_64-xen. This allows running GRUB in
XEN PV environment and load kernels.
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1a46a3a4b3
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59 changed files with 4167 additions and 259 deletions
154
grub-core/lib/x86_64/xen/relocator.S
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154
grub-core/lib/x86_64/xen/relocator.S
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/*
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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 imm64, %rax */
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.byte 0x48
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.byte 0xb8
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VARIABLE(grub_relocator_xen_remapper_virt)
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.quad 0
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movq %rax, %rdi
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/* mov imm64, %rax */
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.byte 0x48
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.byte 0xb8
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VARIABLE(grub_relocator_xen_remapper_map)
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.quad 0
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movq %rax, %rsi
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movq $2, %rdx
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movq $__HYPERVISOR_update_va_mapping, %rax
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syscall
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addq $(LOCAL(cont) - LOCAL(base)), %rdi
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jmp *%rdi
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LOCAL(cont):
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/* mov imm64, %rcx */
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.byte 0x48
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.byte 0xb9
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VARIABLE(grub_relocator_xen_paging_size)
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.quad 0
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/* mov imm64, %rax */
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.byte 0x48
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.byte 0xb8
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VARIABLE(grub_relocator_xen_paging_start)
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.quad 0
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movq %rax, %rdi
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/* mov imm64, %rax */
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.byte 0x48
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.byte 0xb8
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VARIABLE(grub_relocator_xen_mfn_list)
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.quad 0
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movq %rax, %rsi
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1:
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movq %rsi, %rbx
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movq 0(%rsi), %rsi
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shlq $12, %rsi
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orq $5, %rsi
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movq $2, %rdx
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movq %rcx, %r9
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movq $__HYPERVISOR_update_va_mapping, %rax
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syscall
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movq %r9, %rcx
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addq $8, %rbx
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addq $4096, %rdi
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movq %rbx, %rsi
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loop 1b
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leaq EXT_C(grub_relocator_xen_mmu_op) (%rip), %rdi
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movq $3, %rsi
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movq $0, %rdx
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movq $0x7FF0, %r10
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movq $__HYPERVISOR_mmuext_op, %rax
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syscall
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/* mov imm64, %rax */
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.byte 0x48
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.byte 0xb8
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VARIABLE(grub_relocator_xen_remap_continue)
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.quad 0
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jmp *%rax
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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 imm64, %rax */
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.byte 0x48
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.byte 0xb8
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VARIABLE(grub_relocator_xen_remapper_virt2)
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.quad 0
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movq %rax, %rdi
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xorq %rax, %rax
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movq %rax, %rsi
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movq $2, %rdx
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movq $__HYPERVISOR_update_va_mapping, %rax
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syscall
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/* mov imm64, %rax */
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.byte 0x48
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.byte 0xb8
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VARIABLE(grub_relocator_xen_stack)
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.quad 0
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movq %rax, %rsp
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/* mov imm64, %rax */
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.byte 0x48
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.byte 0xb8
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VARIABLE(grub_relocator_xen_start_info)
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.quad 0
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movq %rax, %rsi
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cld
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/* mov imm64, %rax */
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.byte 0x48
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.byte 0xb8
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VARIABLE(grub_relocator_xen_entry_point)
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.quad 0
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jmp *%rax
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VARIABLE(grub_relocator_xen_end)
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