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freebsd
GitHub Repository: freebsd/freebsd-src
 Path: blob/main/sys/amd64/linux/linux_locore.asm
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/*-

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 * SPDX-License-Identifier: BSD-2-Clause

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 *

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 * Copyright (c) 2015-2022 Dmitry Chagin <[email protected]>

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 *

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 * Redistribution and use in source and binary forms, with or without

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 * modification, are permitted provided that the following conditions

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 * are met:

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 * 1. Redistributions of source code must retain the above copyright

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 *    notice, this list of conditions and the following disclaimer.

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 * 2. Redistributions in binary form must reproduce the above copyright

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 *    notice, this list of conditions and the following disclaimer in the

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 *    documentation and/or other materials provided with the distribution.

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 *

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 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND

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 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE

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 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE

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 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE

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 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL

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 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS

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 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)

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 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT

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 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY

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 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF

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 * SUCH DAMAGE.

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 */

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#include "linux_assym.h"			/* system definitions */

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#include <machine/asmacros.h>			/* miscellaneous asm macros */

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#include <amd64/linux/linux_syscall.h>		/* system call numbers */

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	.data

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	.globl linux_platform

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linux_platform:

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	.asciz "x86_64"

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	.text

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ENTRY(linux_rt_sigcode)

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	.cfi_startproc

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	.cfi_signal_frame

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	.cfi_def_cfa	%rsp, LINUX_RT_SIGF_SC

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	.cfi_offset	%r8, L_SC_R8

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	.cfi_offset	%r9, L_SC_R9

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	.cfi_offset	%r10, L_SC_R10

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	.cfi_offset	%r11, L_SC_R11

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	.cfi_offset	%r12, L_SC_R12

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	.cfi_offset	%r13, L_SC_R13

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	.cfi_offset	%r14, L_SC_R14

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	.cfi_offset	%r15, L_SC_R15

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	.cfi_offset	%rdi, L_SC_RDI

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	.cfi_offset	%rsi, L_SC_RSI

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	.cfi_offset	%rbp, L_SC_RBP

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	.cfi_offset	%rbx, L_SC_RBX

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	.cfi_offset	%rdx, L_SC_RDX

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	.cfi_offset	%rax, L_SC_RAX

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	.cfi_offset	%rcx, L_SC_RCX

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	.cfi_offset	%rip, L_SC_RIP

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	.cfi_offset	%rsp, L_SC_RSP

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	movq	%rsp, %rbx			/* rt_sigframe for rt_sigreturn */

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	call	*%rcx				/* call signal handler */

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	movq	$LINUX_SYS_linux_rt_sigreturn, %rax

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	syscall

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0:	hlt

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	jmp	0b

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	.cfi_endproc

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END(linux_rt_sigcode)

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#if 0

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	.section .note.Linux, "a",@note

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	.long 2f - 1f		/* namesz */

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	.balign 4

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	.long 4f - 3f		/* descsz */

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	.long 0

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1:

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	.asciz "Linux"

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2:

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	.balign 4

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3:

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	.long LINUX_VERSION_CODE

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4:

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	.balign 4

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	.previous

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#endif

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