mirror of
https://github.com/torvalds/linux.git
synced 2024-12-02 00:51:44 +00:00
b16fed65a7
Purgatory used no annotations at all. So include linux/linkage.h and annotate everything: * code by SYM_CODE_* * data by SYM_DATA_* [ bp: Fixup comment in gdt: ] Signed-off-by: Jiri Slaby <jslaby@suse.cz> Signed-off-by: Borislav Petkov <bp@suse.de> Cc: Alexios Zavras <alexios.zavras@intel.com> Cc: Allison Randal <allison@lohutok.net> Cc: Enrico Weigelt <info@metux.net> Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Cc: "H. Peter Anvin" <hpa@zytor.com> Cc: Ingo Molnar <mingo@redhat.com> Cc: linux-arch@vger.kernel.org Cc: Thomas Gleixner <tglx@linutronix.de> Cc: x86-ml <x86@kernel.org> Link: https://lkml.kernel.org/r/20191011115108.12392-16-jslaby@suse.cz
60 lines
1.2 KiB
ArmAsm
60 lines
1.2 KiB
ArmAsm
/* 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)
|