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torvalds
GitHub Repository: torvalds/linux
 Path: blob/master/arch/x86/boot/compressed/idt_handlers_64.S
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/* SPDX-License-Identifier: GPL-2.0-only */

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/*

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 * Early IDT handler entry points

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 *

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 * Copyright (C) 2019 SUSE

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 *

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 * Author: Joerg Roedel <[email protected]>

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 */

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#include <asm/segment.h>

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/* For ORIG_RAX */

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#include "../../entry/calling.h"

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.macro EXCEPTION_HANDLER name function error_code=0

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SYM_FUNC_START(\name)

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	/* Build pt_regs */

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	.if \error_code == 0

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	pushq   $0

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	.endif

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	pushq   %rdi

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	pushq   %rsi

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	pushq   %rdx

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	pushq   %rcx

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	pushq   %rax

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	pushq   %r8

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	pushq   %r9

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	pushq   %r10

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	pushq   %r11

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	pushq   %rbx

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	pushq   %rbp

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	pushq   %r12

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	pushq   %r13

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	pushq   %r14

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	pushq   %r15

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	/* Call handler with pt_regs */

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	movq    %rsp, %rdi

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	/* Error code is second parameter */

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	movq	ORIG_RAX(%rsp), %rsi

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	call    \function

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	/* Restore regs */

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	popq    %r15

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	popq    %r14

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	popq    %r13

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	popq    %r12

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	popq    %rbp

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	popq    %rbx

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	popq    %r11

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	popq    %r10

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	popq    %r9

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	popq    %r8

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	popq    %rax

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	popq    %rcx

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	popq    %rdx

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	popq    %rsi

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	popq    %rdi

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	/* Remove error code and return */

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	addq    $8, %rsp

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	iretq

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SYM_FUNC_END(\name)

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	.endm

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	.text

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	.code64

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EXCEPTION_HANDLER	boot_page_fault do_boot_page_fault error_code=1

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EXCEPTION_HANDLER	boot_nmi_trap do_boot_nmi_trap error_code=0

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#ifdef CONFIG_AMD_MEM_ENCRYPT

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EXCEPTION_HANDLER	boot_stage1_vc do_vc_no_ghcb		error_code=1

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EXCEPTION_HANDLER	boot_stage2_vc do_boot_stage2_vc	error_code=1

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#endif

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