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-rw-r--r--purgatory/arch/x86_64/Makefile28
-rw-r--r--purgatory/arch/x86_64/entry64-32.S164
-rw-r--r--purgatory/arch/x86_64/entry64.S107
-rw-r--r--purgatory/arch/x86_64/include/arch/debug.h317
-rw-r--r--purgatory/arch/x86_64/include/arch/io.h7
-rw-r--r--purgatory/arch/x86_64/purgatory-x86_64.c30
-rw-r--r--purgatory/arch/x86_64/purgatory-x86_64.h4
-rw-r--r--purgatory/arch/x86_64/setup-x86_64.S76
-rw-r--r--purgatory/arch/x86_64/stack.S44
9 files changed, 777 insertions, 0 deletions
diff --git a/purgatory/arch/x86_64/Makefile b/purgatory/arch/x86_64/Makefile
new file mode 100644
index 0000000..b0e277a
--- /dev/null
+++ b/purgatory/arch/x86_64/Makefile
@@ -0,0 +1,28 @@
+#
+# Purgatory x86_64
+#
+
+x86_64_PURGATORY_SRCS_native = purgatory/arch/x86_64/entry64-32.S
+x86_64_PURGATORY_SRCS_native += purgatory/arch/x86_64/entry64.S
+x86_64_PURGATORY_SRCS_native += purgatory/arch/x86_64/setup-x86_64.S
+x86_64_PURGATORY_SRCS_native += purgatory/arch/x86_64/stack.S
+x86_64_PURGATORY_SRCS_native += purgatory/arch/x86_64/purgatory-x86_64.c
+
+x86_64_PURGATORY_SRCS += $(x86_64_PURGATORY_SRCS_native)
+
+dist += purgatory/arch/x86_64/Makefile $(x86_64_PURGATORY_SRCS_native) \
+ purgatory/arch/x86_64/include/arch/io.h \
+ purgatory/arch/x86_64/include/arch/debug.h \
+ purgatory/arch/x86_64/purgatory-x86_64.h
+
+# Don't add sources in i386/ to dist, as i386/Makefile adds them
+x86_64_PURGATORY_SRCS += purgatory/arch/i386/entry32-16.S
+x86_64_PURGATORY_SRCS += purgatory/arch/i386/entry32-16-debug.S
+x86_64_PURGATORY_SRCS += purgatory/arch/i386/crashdump_backup.c
+x86_64_PURGATORY_SRCS += purgatory/arch/i386/console-x86.c
+x86_64_PURGATORY_SRCS += purgatory/arch/i386/vga.c
+x86_64_PURGATORY_SRCS += purgatory/arch/i386/pic.c
+
+ifneq ($(SUBARCH),x32)
+x86_64_PURGATORY_EXTRA_CFLAGS = -mcmodel=large
+endif
diff --git a/purgatory/arch/x86_64/entry64-32.S b/purgatory/arch/x86_64/entry64-32.S
new file mode 100644
index 0000000..f2b6377
--- /dev/null
+++ b/purgatory/arch/x86_64/entry64-32.S
@@ -0,0 +1,164 @@
+/*
+ * purgatory: setup code
+ *
+ * Copyright (C) 2003,2004 Eric Biederman (ebiederm@xmission.com)
+ *
+ * This program 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 (version 2 of the License).
+ *
+ * This program 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 this program; if not, write to the Free Software
+ * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+ */
+
+.data
+ .equ MSR_K6_EFER, 0xC0000080
+ .equ EFER_LME, 0x00000100
+ .equ X86_CR4_PAE, 0x00000020
+ .equ CR0_PG, 0x80000000
+
+ .text
+ .balign 16
+ .globl entry32, entry32_regs
+entry32:
+ .code64
+
+ /* Setup the 4G offset of entry32 lm_exit code segment */
+ movq $0x00CF9A000000ffff, %rax
+
+ leaq entry32(%rip), %rbx /* Low 24 bits */
+ andq $0xffffff, %rbx
+ shlq $16, %rbx
+ orq %rbx, %rax
+
+ leaq entry32(%rip), %rbx /* High 8 bits */
+ movq $0xff000000, %rdx
+ andq %rdx, %rbx
+ shlq $32, %rbx
+ orq %rbx, %rax
+
+ movq %rax, (gdt + 0x20)(%rip)
+
+ /* Setup a gdt that is generally usefully */
+ lgdt gdt(%rip)
+
+ /* Setup the far pointer to the entry point */
+ movl eip(%rip), %eax
+ movl %eax, entry32_addr(%rip)
+
+ /* Switch to 32bit compatiblity mode */
+ ljmp *lm_exit_addr(%rip)
+lm_exit:
+ .code32
+
+ /* Disable paging */
+ movl %cr0, %eax
+ andl $~CR0_PG, %eax
+ movl %eax, %cr0
+
+ /* Disable long mode */
+ movl $MSR_K6_EFER, %ecx
+ rdmsr
+ andl $~EFER_LME, %eax
+ wrmsr
+
+ /* Disable PAE */
+ xorl %eax, %eax
+ movl %eax, %cr4
+
+ /* load the data segments */
+ movl $0x18, %eax /* data segment */
+ movl %eax, %ds
+ movl %eax, %es
+ movl %eax, %ss
+ movl %eax, %fs
+ movl %eax, %gs
+
+ /* Load the registers */
+ movl %cs:eax - entry32, %eax
+ movl %cs:ecx - entry32, %ecx
+ movl %cs:edx - entry32, %edx
+ movl %cs:esi - entry32, %esi
+ movl %cs:edi - entry32, %edi
+ movl %cs:esp - entry32, %esp
+ movl %cs:ebp - entry32, %ebp
+ movl %cs:ebx - entry32, %ebx
+
+ /* Jump to the loaded image */
+ ljmp *%cs:entry32_addr - entry32
+
+ .section ".data"
+ .balign 16
+gdt: /* 0x00 unusable segment
+ * 0x08 unused
+ * so use them as the gdt ptr
+ */
+ .word gdt_end - gdt - 1
+ .quad gdt
+ .word 0, 0, 0
+
+ /* Documented linux kernel segments */
+ /* 0x10 4GB flat code segment */
+ .word 0xFFFF, 0x0000, 0x9A00, 0x00CF
+ /* 0x18 4GB flat data segment */
+ .word 0xFFFF, 0x0000, 0x9200, 0x00CF
+
+ /* 0x20 4GB flat code segment base at entry32 */
+ .word 0xFFFF, 0x0000, 0x9A00, 0x0CF
+ /* 0x28 dummy */
+ .word 0x0000, 0x0000, 0x0000, 0x000
+ /* 0x30 dummy */
+ .word 0x0000, 0x0000, 0x0000, 0x000
+ /* 0x38 dummy */
+ .word 0x0000, 0x0000, 0x0000, 0x000
+ /* 0x40 dummy */
+ .word 0x0000, 0x0000, 0x0000, 0x000
+ /* 0x48 dummy */
+ .word 0x0000, 0x0000, 0x0000, 0x000
+ /* 0x50 dummy */
+ .word 0x0000, 0x0000, 0x0000, 0x000
+ /* 0x58 dummy */
+ .word 0x0000, 0x0000, 0x0000, 0x000
+
+ /* Segments used by the 2.5.x kernel */
+ /* 0x60 4GB flat code segment */
+ .word 0xFFFF, 0x0000, 0x9A00, 0x00CF
+ /* 0x68 4GB flat data segment */
+ .word 0xFFFF, 0x0000, 0x9200, 0x00CF
+gdt_end:
+
+ .section ".rodata"
+ .balign 4
+lm_exit_addr:
+ .long lm_exit - entry32
+ .long 0x20
+
+ .section ".data"
+ .balign 4
+entry32_addr:
+ .long 0x00000000
+ .long 0x10
+
+ .section ".rodata"
+ .balign 4
+entry32_regs:
+eax: .long 0x00000000
+ebx: .long 0x00000000
+ecx: .long 0x00000000
+edx: .long 0x00000000
+esi: .long 0x00000000
+edi: .long 0x00000000
+esp: .long 0x00000000
+ebp: .long 0x00000000
+eip: .quad entry16 /* low 32 bits address
+ * high 32bits zeros
+ * uses 64bit reloc
+ */
+ .size entry32_regs, (. - 4) - entry32_regs
+
diff --git a/purgatory/arch/x86_64/entry64.S b/purgatory/arch/x86_64/entry64.S
new file mode 100644
index 0000000..e3223b7
--- /dev/null
+++ b/purgatory/arch/x86_64/entry64.S
@@ -0,0 +1,107 @@
+/*
+ * kexec: Linux boots Linux
+ *
+ * Copyright (C) 2003,2004 Eric Biederman (ebiederm@xmission.com)
+ *
+ * This program 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 (version 2 of the License).
+ *
+ * This program 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 this program; if not, write to the Free Software
+ * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+ */
+
+#include "arch/debug.h"
+
+.text
+.code64
+ .balign 16
+ .globl entry64, entry64_regs
+entry64:
+ /* Don't worry about special registers... */
+
+ /* Setup a gdt that should be preserved */
+ lgdt gdt(%rip)
+
+ /* load the data segments */
+ movl $0x18, %eax /* data segment */
+ movl %eax, %ds
+ movl %eax, %es
+ movl %eax, %ss
+ movl %eax, %fs
+ movl %eax, %gs
+
+ leaq stack_init(%rip), %rsp
+ pushq $0x10 /* CS */
+ leaq new_cs_exit(%rip), %rax
+ pushq %rax
+ lretq
+new_cs_exit:
+
+ /* Load the registers */
+ movq rax(%rip), %rax
+ movq rbx(%rip), %rbx
+ movq rcx(%rip), %rcx
+ movq rdx(%rip), %rdx
+ movq rsi(%rip), %rsi
+ movq rdi(%rip), %rdi
+ movq rsp(%rip), %rsp
+ movq rbp(%rip), %rbp
+ movq r8(%rip), %r8
+ movq r9(%rip), %r9
+ movq r10(%rip), %r10
+ movq r11(%rip), %r11
+ movq r12(%rip), %r12
+ movq r13(%rip), %r13
+ movq r14(%rip), %r14
+ movq r15(%rip), %r15
+
+ /* Jump to the new code... */
+ jmpq *rip(%rip)
+
+ .section ".rodata"
+ .balign 4
+entry64_regs:
+rax: .quad 0x00000000
+rbx: .quad 0x00000000
+rcx: .quad 0x00000000
+rdx: .quad 0x00000000
+rsi: .quad 0x00000000
+rdi: .quad 0x00000000
+rsp: .quad 0x00000000
+rbp: .quad 0x00000000
+r8: .quad 0x00000000
+r9: .quad 0x00000000
+r10: .quad 0x00000000
+r11: .quad 0x00000000
+r12: .quad 0x00000000
+r13: .quad 0x00000000
+r14: .quad 0x00000000
+r15: .quad 0x00000000
+rip: .quad entry32
+ .size entry64_regs, . - entry64_regs
+
+ .section ".rodata"
+ .balign 16
+gdt: /* 0x00 unusable segment
+ * 0x08 unused
+ * so use them as the gdt ptr
+ */
+ .word gdt_end - gdt - 1
+ .quad gdt
+ .word 0, 0, 0
+
+ /* 0x10 4GB flat code segment */
+ .word 0xFFFF, 0x0000, 0x9A00, 0x00AF
+
+ /* 0x18 4GB flat data segment */
+ .word 0xFFFF, 0x0000, 0x9200, 0x00CF
+gdt_end:
+stack: .quad 0, 0
+stack_init:
diff --git a/purgatory/arch/x86_64/include/arch/debug.h b/purgatory/arch/x86_64/include/arch/debug.h
new file mode 100644
index 0000000..e050942
--- /dev/null
+++ b/purgatory/arch/x86_64/include/arch/debug.h
@@ -0,0 +1,317 @@
+/* Base Address */
+#define TTYS0_BASE 0x3f8
+/* Data */
+#define TTYS0_RBR (TTYS0_BASE+0x00)
+#define TTYS0_TBR (TTYS0_BASE+0x00)
+/* Control */
+#define TTYS0_IER (TTYS0_BASE+0x01)
+#define TTYS0_IIR (TTYS0_BASE+0x02)
+#define TTYS0_FCR (TTYS0_BASE+0x02)
+#define TTYS0_LCR (TTYS0_BASE+0x03)
+#define TTYS0_MCR (TTYS0_BASE+0x04)
+
+#define TTYS0_DLL (TTYS0_BASE+0x00)
+#define TTYS0_DLM (TTYS0_BASE+0x01)
+/* Status */
+#define TTYS0_LSR (TTYS0_BASE+0x05)
+#define TTYS0_MSR (TTYS0_BASE+0x06)
+#define TTYS0_SCR (TTYS0_BASE+0x07)
+
+#define TTYS0_BAUD 9600
+#define TTYS0_DIV (115200/TTYS0_BAUD)
+#define TTYS0_DIV_LO (TTYS0_DIV&0xFF)
+#define TTYS0_DIV_HI ((TTYS0_DIV >> 8)&0xFF)
+
+#if ((115200%TTYS0_BAUD) != 0)
+#error Bad ttyS0 baud rate
+#endif
+
+#define TTYS0_INIT \
+ /* disable interrupts */ \
+ movb $0x00, %al ; \
+ movw $TTYS0_IER, %dx ; \
+ outb %al, %dx ; \
+ ; \
+ /* enable fifos */ \
+ movb $0x01, %al ; \
+ movw $TTYS0_FCR, %dx ; \
+ outb %al, %dx ; \
+ ; \
+ /* Set Baud Rate Divisor to TTYS0_BAUD */ \
+ movw $TTYS0_LCR, %dx ; \
+ movb $0x83, %al ; \
+ outb %al, %dx ; \
+ ; \
+ movw $TTYS0_DLL, %dx ; \
+ movb $TTYS0_DIV_LO, %al ; \
+ outb %al, %dx ; \
+ ; \
+ movw $TTYS0_DLM, %dx ; \
+ movb $TTYS0_DIV_HI, %al ; \
+ outb %al, %dx ; \
+ ; \
+ movw $TTYS0_LCR, %dx ; \
+ movb $0x03, %al ; \
+ outb %al, %dx
+
+
+ /* uses: ax, dx */
+#define TTYS0_TX_AL \
+ mov %al, %ah ; \
+9: mov $TTYS0_LSR, %dx ; \
+ inb %dx, %al ; \
+ test $0x20, %al ; \
+ je 9b ; \
+ mov $TTYS0_TBR, %dx ; \
+ mov %ah, %al ; \
+ outb %al, %dx
+
+ /* uses: ax, dx */
+#define TTYS0_TX_CHAR(byte) \
+ mov byte, %al ; \
+ TTYS0_TX_AL
+
+ /* uses: eax, dx */
+#define TTYS0_TX_HEX32(lword) \
+ mov lword, %eax ; \
+ shr $28, %eax ; \
+ add $'0', %al ; \
+ cmp $'9', %al ; \
+ jle 9f ; \
+ add $39, %al ; \
+9: ; \
+ TTYS0_TX_AL ; \
+ ; \
+ mov lword, %eax ; \
+ shr $24, %eax ; \
+ and $0x0f, %al ; \
+ add $'0', %al ; \
+ cmp $'9', %al ; \
+ jle 9f ; \
+ add $39, %al ; \
+9: ; \
+ TTYS0_TX_AL ; \
+ ; \
+ mov lword, %eax ; \
+ shr $20, %eax ; \
+ and $0x0f, %al ; \
+ add $'0', %al ; \
+ cmp $'9', %al ; \
+ jle 9f ; \
+ add $39, %al ; \
+9: ; \
+ TTYS0_TX_AL ; \
+ ; \
+ mov lword, %eax ; \
+ shr $16, %eax ; \
+ and $0x0f, %al ; \
+ add $'0', %al ; \
+ cmp $'9', %al ; \
+ jle 9f ; \
+ add $39, %al ; \
+9: ; \
+ TTYS0_TX_AL ; \
+ ; \
+ mov lword, %eax ; \
+ shr $12, %eax ; \
+ and $0x0f, %al ; \
+ add $'0', %al ; \
+ cmp $'9', %al ; \
+ jle 9f ; \
+ add $39, %al ; \
+9: ; \
+ TTYS0_TX_AL ; \
+ ; \
+ mov lword, %eax ; \
+ shr $8, %eax ; \
+ and $0x0f, %al ; \
+ add $'0', %al ; \
+ cmp $'9', %al ; \
+ jle 9f ; \
+ add $39, %al ; \
+9: ; \
+ TTYS0_TX_AL ; \
+ ; \
+ mov lword, %eax ; \
+ shr $4, %eax ; \
+ and $0x0f, %al ; \
+ add $'0', %al ; \
+ cmp $'9', %al ; \
+ jle 9f ; \
+ add $39, %al ; \
+9: ; \
+ TTYS0_TX_AL ; \
+ ; \
+ mov lword, %eax ; \
+ and $0x0f, %al ; \
+ add $'0', %al ; \
+ cmp $'9', %al ; \
+ jle 9f ; \
+ add $39, %al ; \
+9: ; \
+ TTYS0_TX_AL
+
+ /* uses: rax, dx */
+#define TTYS0_TX_HEX64(lword) \
+ mov lword, %rax ; \
+ shr $60, %rax ; \
+ add $'0', %al ; \
+ cmp $'9', %al ; \
+ jle 9f ; \
+ add $39, %al ; \
+9: ; \
+ TTYS0_TX_AL ; \
+ ; \
+ mov lword, %rax ; \
+ shr $56, %rax ; \
+ and $0x0f, %al ; \
+ add $'0', %al ; \
+ cmp $'9', %al ; \
+ jle 9f ; \
+ add $39, %al ; \
+9: ; \
+ TTYS0_TX_AL ; \
+ ; \
+ mov lword, %rax ; \
+ shr $52, %rax ; \
+ and $0x0f, %al ; \
+ add $'0', %al ; \
+ cmp $'9', %al ; \
+ jle 9f ; \
+ add $39, %al ; \
+9: ; \
+ TTYS0_TX_AL ; \
+ ; \
+ mov lword, %rax ; \
+ shr $48, %rax ; \
+ and $0x0f, %al ; \
+ add $'0', %al ; \
+ cmp $'9', %al ; \
+ jle 9f ; \
+ add $39, %al ; \
+9: ; \
+ TTYS0_TX_AL ; \
+ ; \
+ mov lword, %rax ; \
+ shr $44, %rax ; \
+ and $0x0f, %al ; \
+ add $'0', %al ; \
+ cmp $'9', %al ; \
+ jle 9f ; \
+ add $39, %al ; \
+9: ; \
+ TTYS0_TX_AL ; \
+ ; \
+ mov lword, %rax ; \
+ shr $40, %rax ; \
+ and $0x0f, %al ; \
+ add $'0', %al ; \
+ cmp $'9', %al ; \
+ jle 9f ; \
+ add $39, %al ; \
+9: ; \
+ TTYS0_TX_AL ; \
+ ; \
+ mov lword, %rax ; \
+ shr $36, %rax ; \
+ and $0x0f, %al ; \
+ add $'0', %al ; \
+ cmp $'9', %al ; \
+ jle 9f ; \
+ add $39, %al ; \
+9: ; \
+ TTYS0_TX_AL ; \
+ ; \
+ mov lword, %rax ; \
+ shr $32, %rax ; \
+ and $0x0f, %al ; \
+ add $'0', %al ; \
+ cmp $'9', %al ; \
+ jle 9f ; \
+ add $39, %al ; \
+9: ; \
+ TTYS0_TX_AL ; \
+ ; \
+ mov lword, %rax ; \
+ shr $28, %rax ; \
+ add $'0', %al ; \
+ cmp $'9', %al ; \
+ jle 9f ; \
+ add $39, %al ; \
+9: ; \
+ TTYS0_TX_AL ; \
+ ; \
+ mov lword, %rax ; \
+ shr $24, %rax ; \
+ and $0x0f, %al ; \
+ add $'0', %al ; \
+ cmp $'9', %al ; \
+ jle 9f ; \
+ add $39, %al ; \
+9: ; \
+ TTYS0_TX_AL ; \
+ ; \
+ mov lword, %rax ; \
+ shr $20, %rax ; \
+ and $0x0f, %al ; \
+ add $'0', %al ; \
+ cmp $'9', %al ; \
+ jle 9f ; \
+ add $39, %al ; \
+9: ; \
+ TTYS0_TX_AL ; \
+ ; \
+ mov lword, %rax ; \
+ shr $16, %rax ; \
+ and $0x0f, %al ; \
+ add $'0', %al ; \
+ cmp $'9', %al ; \
+ jle 9f ; \
+ add $39, %al ; \
+9: ; \
+ TTYS0_TX_AL ; \
+ ; \
+ mov lword, %rax ; \
+ shr $12, %rax ; \
+ and $0x0f, %al ; \
+ add $'0', %al ; \
+ cmp $'9', %al ; \
+ jle 9f ; \
+ add $39, %al ; \
+9: ; \
+ TTYS0_TX_AL ; \
+ ; \
+ mov lword, %rax ; \
+ shr $8, %rax ; \
+ and $0x0f, %al ; \
+ add $'0', %al ; \
+ cmp $'9', %al ; \
+ jle 9f ; \
+ add $39, %al ; \
+9: ; \
+ TTYS0_TX_AL ; \
+ ; \
+ mov lword, %rax ; \
+ shr $4, %rax ; \
+ and $0x0f, %al ; \
+ add $'0', %al ; \
+ cmp $'9', %al ; \
+ jle 9f ; \
+ add $39, %al ; \
+9: ; \
+ TTYS0_TX_AL ; \
+ ; \
+ mov lword, %rax ; \
+ and $0x0f, %al ; \
+ add $'0', %al ; \
+ cmp $'9', %al ; \
+ jle 9f ; \
+ add $39, %al ; \
+9: ; \
+ TTYS0_TX_AL
+
+
+#define DEBUG_CHAR(x) TTYS0_TX_CHAR($x) ; TTYS0_TX_CHAR($'\r') ; TTYS0_TX_CHAR($'\n')
+#define DEBUG_TX_HEX32(x) TTYS0_TX_HEX32(x); TTYS0_TX_CHAR($'\r') ; TTYS0_TX_CHAR($'\n')
+#define DEBUG_TX_HEX64(x) TTYS0_TX_HEX64(x); TTYS0_TX_CHAR($'\r') ; TTYS0_TX_CHAR($'\n')
+
diff --git a/purgatory/arch/x86_64/include/arch/io.h b/purgatory/arch/x86_64/include/arch/io.h
new file mode 100644
index 0000000..464cd14
--- /dev/null
+++ b/purgatory/arch/x86_64/include/arch/io.h
@@ -0,0 +1,7 @@
+#ifndef ARCH_X86_64_IO_H
+#define ARCH_X86_64_IO_H
+
+#include <stdint.h>
+#include "../../../i386/include/arch/io.h"
+
+#endif /* ARCH_X86_64_IO_H */
diff --git a/purgatory/arch/x86_64/purgatory-x86_64.c b/purgatory/arch/x86_64/purgatory-x86_64.c
new file mode 100644
index 0000000..c25a9c2
--- /dev/null
+++ b/purgatory/arch/x86_64/purgatory-x86_64.c
@@ -0,0 +1,30 @@
+#include <stdint.h>
+#include <stddef.h>
+#include <purgatory.h>
+#include "purgatory-x86_64.h"
+
+uint8_t reset_vga = 0;
+uint8_t legacy_pic = 0;
+uint8_t panic_kernel = 0;
+unsigned long jump_back_entry = 0;
+char *cmdline_end = NULL;
+
+void setup_arch(void)
+{
+ if (reset_vga) x86_reset_vga();
+ if (legacy_pic) x86_setup_legacy_pic();
+}
+
+void x86_setup_jump_back_entry(void)
+{
+ if (cmdline_end)
+ sprintf(cmdline_end, " kexec_jump_back_entry=0x%lx",
+ jump_back_entry);
+}
+
+/* This function can be used to execute after the SHA256 verification. */
+void post_verification_setup_arch(void)
+{
+ if (panic_kernel) crashdump_backup_memory();
+ if (jump_back_entry) x86_setup_jump_back_entry();
+}
diff --git a/purgatory/arch/x86_64/purgatory-x86_64.h b/purgatory/arch/x86_64/purgatory-x86_64.h
new file mode 100644
index 0000000..209edea
--- /dev/null
+++ b/purgatory/arch/x86_64/purgatory-x86_64.h
@@ -0,0 +1,4 @@
+#ifndef PURGATORY_X86_64_H
+#define PURGATORY_X86_64_H
+#include "../i386/purgatory-x86.h"
+#endif /* PURGATORY_X86_64_H */
diff --git a/purgatory/arch/x86_64/setup-x86_64.S b/purgatory/arch/x86_64/setup-x86_64.S
new file mode 100644
index 0000000..95572d8
--- /dev/null
+++ b/purgatory/arch/x86_64/setup-x86_64.S
@@ -0,0 +1,76 @@
+/*
+ * purgatory: setup code
+ *
+ * Copyright (C) 2003,2004 Eric Biederman (ebiederm@xmission.com)
+ *
+ * This program 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 (version 2 of the License).
+ *
+ * This program 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 this program; if not, write to the Free Software
+ * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+ */
+
+#include "arch/debug.h"
+
+
+#undef i386
+
+ .text
+ .globl purgatory_start
+ .balign 16
+purgatory_start:
+ .code64
+
+ /* Load a gdt so I know what the segment registers are */
+ lgdt gdt(%rip)
+
+ /* load the data segments */
+ movl $0x18, %eax /* data segment */
+ movl %eax, %ds
+ movl %eax, %es
+ movl %eax, %ss
+ movl %eax, %fs
+ movl %eax, %gs
+
+ /* In 64bit mode the code segment is meaningless */
+
+ movq 0(%rsp), %rax
+ movq %rax, jump_back_entry(%rip)
+
+ /* Setup a stack */
+ leaq lstack_end(%rip), %rsp
+
+ /* Call the C code */
+ call purgatory
+ jmp entry64
+
+ .section ".rodata"
+ .balign 16
+gdt: /* 0x00 unusable segment
+ * 0x08 unused
+ * so use them as the gdt ptr
+ */
+ .word gdt_end - gdt - 1
+ .quad gdt
+ .word 0, 0, 0
+
+ /* 0x10 4GB flat code segment */
+ .word 0xFFFF, 0x0000, 0x9A00, 0x00AF
+
+ /* 0x18 4GB flat data segment */
+ .word 0xFFFF, 0x0000, 0x9200, 0x00CF
+gdt_end:
+
+ .bss
+ .balign 4096
+lstack:
+ .skip 4096
+lstack_end:
+
diff --git a/purgatory/arch/x86_64/stack.S b/purgatory/arch/x86_64/stack.S
new file mode 100644
index 0000000..4188ea3
--- /dev/null
+++ b/purgatory/arch/x86_64/stack.S
@@ -0,0 +1,44 @@
+/*
+ * purgatory: stack
+ *
+ * Copyright (C) 2003,2004 Eric Biederman (ebiederm@xmission.com)
+ *
+ * This program 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 (version 2 of the License).
+ *
+ * This program 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 this program; if not, write to the Free Software
+ * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+ */
+
+ /* A stack for the loaded kernel.
+ * Seperate and in the data section so it can be prepopulated.
+ */
+ .data
+ .balign 4096
+ .globl stack, stack_end
+ .globl stack_arg32_1, stack_arg32_2, stack_arg32_3 ,stack_arg32_4
+ .globl stack_arg32_5, stack_arg32_6, stack_arg32_7 ,stack_arg32_8
+ .globl stack_arg64_1, stack_arg64_2, stack_arg64_3 ,stack_arg64_4
+
+stack:
+ .skip 4096 - (8*4)
+stack_arg64_4: ; .size stack_arg64_4, 8
+stack_arg32_8: .long 0 ; .size stack_arg32_8, 4
+stack_arg32_7: .long 0 ; .size stack_arg32_7, 4
+stack_arg64_3: ; .size stack_arg64_3, 8
+stack_arg32_6: .long 0 ; .size stack_arg32_6, 4
+stack_arg32_5: .long 0 ; .size stack_arg32_5, 4
+stack_arg64_2: ; .size stack_arg64_2, 8
+stack_arg32_4: .long 0 ; .size stack_arg32_4, 4
+stack_arg32_3: .long 0 ; .size stack_arg32_3, 4
+stack_arg64_1: ; .size stack_arg64_1, 8
+stack_arg32_2: .long 0 ; .size stack_arg32_2, 4
+stack_arg32_1: .long 0 ; .size stack_arg32_1, 4
+stack_end:
generated by cgit v1.2.3 (git 2.39.1) at 2024-07-29 07:50:36 +0000