* 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/symbol.h>
-#include <grub/i386/memory.h>
-
-#ifdef __x86_64__
-#define RAX %rax
-#define RSI %rsi
-#else
-#define RAX %eax
-#define RSI %esi
-#endif
-
+
/* The code segment of the protected mode. */
#define CODE_SEGMENT 0x08
#define PSEUDO_REAL_DSEG 0x20
+#include "relocator_common.S"
+
.p2align 4 /* force 16-byte alignment */
VARIABLE(grub_relocator16_start)
-LOCAL(base):
- /* %rax contains now our new 'base'. */
- mov RAX, RSI
- add $(LOCAL(cont0) - LOCAL(base)), RAX
- jmp *RAX
-LOCAL(cont0):
- lea (LOCAL(cont1) - LOCAL(base)) (RSI, 1), RAX
- movl %eax, (LOCAL(jump_vector) - LOCAL(base)) (RSI, 1)
-
- lea (LOCAL(gdt) - LOCAL(base)) (RSI, 1), RAX
- mov RAX, (LOCAL(gdt_addr) - LOCAL(base)) (RSI, 1)
+ PREAMBLE
movl %esi, %eax
movw %ax, (LOCAL (cs_base_bytes12) - LOCAL (base)) (RSI, 1)
shrl $16, %eax
movb %al, (LOCAL (cs_base_byte3) - LOCAL (base)) (RSI, 1)
- /* Switch to compatibility mode. */
-
- lgdt (LOCAL(gdtdesc) - LOCAL(base)) (RSI, 1)
-
- /* Update %cs. */
- ljmp *(LOCAL(jump_vector) - LOCAL(base)) (RSI, 1)
-
-LOCAL(cont1):
+ RELOAD_GDT
.code32
+ /* Update other registers. */
+ movl $DATA_SEGMENT, %eax
+ movl %eax, %ds
+ movl %eax, %es
+ movl %eax, %fs
+ movl %eax, %gs
+ movl %eax, %ss
- /* Disable paging. */
- movl %cr0, %eax
- andl $(~GRUB_MEMORY_CPU_CR0_PAGING_ON), %eax
- movl %eax, %cr0
+ DISABLE_PAGING
+#ifdef __x86_64__
/* Disable amd64. */
movl $GRUB_MEMORY_CPU_AMD64_MSR, %ecx
rdmsr
andl $(~GRUB_MEMORY_CPU_AMD64_MSR_ON), %eax
wrmsr
+#endif
/* Turn off PAE. */
movl %cr4, %eax
- andl $GRUB_MEMORY_CPU_CR4_PAE_ON, %eax
+ andl $(~GRUB_MEMORY_CPU_CR4_PAE_ON), %eax
movl %eax, %cr4
/* Update other registers. */
*/
.word 0xFFFF, 0
.byte 0, 0x92, 0, 0
-
- .p2align 4
-LOCAL(gdtdesc):
- .word 0x27
-LOCAL(gdt_addr):
-#ifdef __x86_64__
- /* Filled by the code. */
- .quad 0
-#else
- /* Filled by the code. */
- .long 0
-#endif
-
- .p2align 4
-LOCAL(jump_vector):
- /* Jump location. Is filled by the code */
- .long 0
- .long CODE_SEGMENT
+LOCAL(gdt_end):
VARIABLE(grub_relocator16_end)
* along with GRUB. If not, see <http://www.gnu.org/licenses/>.
*/
-#include <grub/symbol.h>
-#include <grub/i386/memory.h>
-
-#ifdef __x86_64__
-#define RAX %rax
-#define RSI %rsi
-#else
-#define RAX %eax
-#define RSI %esi
-#endif
-
/* The code segment of the protected mode. */
#define CODE_SEGMENT 0x10
/* The data segment of the protected mode. */
#define DATA_SEGMENT 0x18
+#include "relocator_common.S"
+
.p2align 4 /* force 16-byte alignment */
VARIABLE(grub_relocator32_start)
-LOCAL(base):
- /* %rax contains now our new 'base'. */
- mov RAX, RSI
- add $(LOCAL(cont0) - LOCAL(base)), RAX
- jmp *RAX
-LOCAL(cont0):
- lea (LOCAL(cont1) - LOCAL(base)) (RSI, 1), RAX
- movl %eax, (LOCAL(jump_vector) - LOCAL(base)) (RSI, 1)
+ PREAMBLE
- lea (LOCAL(gdt) - LOCAL(base)) (RSI, 1), RAX
- mov RAX, (LOCAL(gdt_addr) - LOCAL(base)) (RSI, 1)
-
- /* Switch to compatibility mode. */
-
- lgdt (LOCAL(gdtdesc) - LOCAL(base)) (RSI, 1)
-
- /* Update %cs. */
- ljmp *(LOCAL(jump_vector) - LOCAL(base)) (RSI, 1)
-
-LOCAL(cont1):
+ RELOAD_GDT
.code32
-
/* Update other registers. */
movl $DATA_SEGMENT, %eax
movl %eax, %ds
movl %eax, %gs
movl %eax, %ss
- /* Disable paging. */
- movl %cr0, %eax
- andl $(~GRUB_MEMORY_CPU_CR0_PAGING_ON), %eax
- movl %eax, %cr0
+ DISABLE_PAGING
+#ifdef __x86_64__
/* Disable amd64. */
movl $GRUB_MEMORY_CPU_AMD64_MSR, %ecx
rdmsr
andl $(~GRUB_MEMORY_CPU_AMD64_MSR_ON), %eax
wrmsr
+#endif
/* Turn off PAE. */
movl %cr4, %eax
/* Data segment. */
.byte 0xFF, 0xFF, 0x00, 0x00, 0x00, 0x92, 0xCF, 0x00
-
- .p2align 4
-LOCAL(gdtdesc):
- .word 0x27
-LOCAL(gdt_addr):
-#ifdef __x86_64__
- /* Filled by the code. */
- .quad 0
-#else
- /* Filled by the code. */
- .long 0
-#endif
-
- .p2align 4
-LOCAL(jump_vector):
- /* Jump location. Is filled by the code */
- .long 0
- .long CODE_SEGMENT
+LOCAL(gdt_end):
VARIABLE(grub_relocator32_end)
* along with GRUB. If not, see <http://www.gnu.org/licenses/>.
*/
-#include <grub/symbol.h>
-#include <grub/i386/memory.h>
-
-#ifdef __x86_64__
-#define RAX %rax
-#define RSI %rsi
-#else
-#define RAX %eax
-#define RSI %esi
-#endif
-
#define CODE32_SEGMENT 0x18
-#define CODE64_SEGMENT 0x08
+#define CODE_SEGMENT 0x08
/* The data segment of the protected mode. */
#define DATA_SEGMENT 0x10
+#include "relocator_common.S"
+
.p2align 4 /* force 16-byte alignment */
VARIABLE(grub_relocator64_start)
-LOCAL(base):
- /* %rax contains now our new 'base'. */
- mov RAX, RSI
-
- add $(LOCAL(cont0) - LOCAL(base)), RAX
- jmp *RAX
-LOCAL(cont0):
+ PREAMBLE
#ifndef __x86_64__
- lea (LOCAL(cont1) - LOCAL(base)) (RSI, 1), RAX
- mov RAX, (LOCAL(jump_vector) - LOCAL(base)) (RSI, 1)
-
- lea (LOCAL(gdt) - LOCAL(base)) (RSI, 1), RAX
- mov RAX, (LOCAL(gdt_addr) - LOCAL(base)) (RSI, 1)
-
- /* Disable paging. */
- movl %cr0, %eax
- andl $(~GRUB_MEMORY_CPU_CR0_PAGING_ON), %eax
- movl %eax, %cr0
+ DISABLE_PAGING
/* Turn on PAE. */
movl %cr4, %eax
orl $GRUB_MEMORY_CPU_CR0_PAGING_ON, %eax
movl %eax, %cr0
- /* Load GDT. */
- lgdt (LOCAL(gdtdesc) - LOCAL(base)) (RSI, 1)
-
- /* Update %cs. */
- ljmp *(LOCAL(jump_vector) - LOCAL(base)) (RSI, 1)
+ RELOAD_GDT
#else
/* mov imm64, %rax */
.byte 0x48
movq %rax, %cr3
#endif
-LOCAL(cont1):
.code64
/* mov imm64, %rax */
| (1 << 7) /* 4K granular. */)
.byte 0x00 /* Base 00xxxxxx. */
- .p2align 4
-LOCAL(gdtdesc):
- .word 0x20
-LOCAL(gdt_addr):
- /* Filled by the code. */
- .long 0
-
- .p2align 4
-LOCAL(jump_vector):
- /* Jump location. Is filled by the code */
- .long 0
- .long CODE64_SEGMENT
+LOCAL(gdt_end):
#endif
VARIABLE(grub_relocator64_end)
--- /dev/null
+/*
+ * GRUB -- GRand Unified Bootloader
+ * Copyright (C) 2009,2010 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/symbol.h>
+#include <grub/i386/memory.h>
+
+#ifdef __x86_64__
+#define RAX %rax
+#define RSI %rsi
+#else
+#define RAX %eax
+#define RSI %esi
+#endif
+
+ .macro DISABLE_PAGING
+#ifdef GRUB_MACHINE_IEEE1275
+#endif
+
+ movl %cr0, %eax
+ andl $(~GRUB_MEMORY_CPU_CR0_PAGING_ON), %eax
+ movl %eax, %cr0
+ .endm
+
+ .macro PREAMBLE
+LOCAL(base):
+ /* %rax contains now our new 'base'. */
+ mov RAX, RSI
+
+ add $(LOCAL(cont0) - LOCAL(base)), RAX
+ jmp *RAX
+LOCAL(cont0):
+ .endm
+
+ .macro RELOAD_GDT
+ lea (LOCAL(cont1) - LOCAL(base)) (RSI, 1), RAX
+ movl %eax, (LOCAL(jump_vector) - LOCAL(base)) (RSI, 1)
+
+ lea (LOCAL(gdt) - LOCAL(base)) (RSI, 1), RAX
+ mov RAX, (LOCAL(gdt_addr) - LOCAL(base)) (RSI, 1)
+
+ /* Switch to compatibility mode. */
+ lgdt (LOCAL(gdtdesc) - LOCAL(base)) (RSI, 1)
+
+ /* Update %cs. */
+ ljmp *(LOCAL(jump_vector) - LOCAL(base)) (RSI, 1)
+
+ .p2align 4
+LOCAL(gdtdesc):
+ .word LOCAL(gdt_end) - LOCAL(gdt)
+LOCAL(gdt_addr):
+#ifdef __x86_64__
+ /* Filled by the code. */
+ .quad 0
+#else
+ /* Filled by the code. */
+ .long 0
+#endif
+
+ .p2align 4
+LOCAL(jump_vector):
+ /* Jump location. Is filled by the code */
+ .long 0
+ .long CODE_SEGMENT
+
+LOCAL(cont1):
+ .endm
projects / thirdparty / grub.git / commitdiff
