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Nama	Ukuran	Aksi
entry64.S	1.94 MB	View DL Edit
Makefile	2.91 MB	View DL Edit
purgatory.c	1.23 MB	View DL Edit
setup-x86_64.S	1.17 MB	View DL Edit
stack.S	350 B	View DL Edit

Edit file: /usr/src/kernels/5.14.0-611.34.1.el9_7.x86_64/arch/x86/purgatory/setup-x86_64.S

/* SPDX-License-Identifier: GPL-2.0-only */
/*
 * purgatory:  setup code
 *
 * Copyright (C) 2003,2004  Eric Biederman (ebiederm@xmission.com)
 * Copyright (C) 2014 Red Hat Inc.
 *
 * This code has been taken from kexec-tools.
 */
#include <linux/linkage.h>
#include <asm/purgatory.h>

.text
	.balign 16
	.code64

SYM_CODE_START(purgatory_start)
	/* 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

/* Setup a stack */
	leaq	lstack_end(%rip), %rsp

/* Call the C code */
	call purgatory
	jmp	entry64
SYM_CODE_END(purgatory_start)

.section ".rodata"
	.balign 16
SYM_DATA_START_LOCAL(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
SYM_DATA_END_LABEL(gdt, SYM_L_LOCAL, gdt_end)

.bss
	.balign 4096
SYM_DATA_START_LOCAL(lstack)
	.skip 4096
SYM_DATA_END_LABEL(lstack, SYM_L_LOCAL, lstack_end)

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