HardenedBSD/sys/conf/vdso_amd64_ia32.ldscript

/*-
 * SPDX-License-Identifier: BSD-2-Clause
 *
 * Copyright (c) 2021 The FreeBSD Foundation
 *
 * This software was developed by Konstantin Belousov <kib@FreeBSD.org>
 * under sponsorship from the FreeBSD Foundation.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 */

/*
 * Linker script for ia32 (32bit) vdso on amd64.
 */

/*
 * The OUTPUT_ARCH and TARGET lines are for ld.bfd, which cannot determine
 * the output format based on the first input file.
 * lld doesn't do much with them, the only thing it does is produce ELF
 * or binary based on TARGET.
 */
OUTPUT_ARCH(i386)
TARGET(elf32-i386-freebsd)

PHDRS
{
	text		PT_LOAD		FILEHDR PHDRS FLAGS(5); /* PF_R|PF_X */
	dynamic		PT_DYNAMIC	FLAGS(5);
	eh_frame_hdr	PT_GNU_EH_FRAME FLAGS(5);
}

SECTIONS
{
	. = . + SIZEOF_HEADERS;

	.hash		: { *(.hash) }			:text
	.gnu.hash	: { *(.gnu.hash) }		:text
	.dynsym		: { *(.dynsym) }		:text
	.dynstr		: { *(.dynstr) }		:text
	.gnu.version	: { *(.gnu.version) }		:text
	.gnu.version_d	: { *(.gnu.version_d) }		:text
	.gnu.version_r	: { *(.gnu.version_r) }		:text
	.eh_frame_hdr	: { *(.eh_frame_hdr) }		:text	:eh_frame_hdr
	.eh_frame	: { KEEP (*(.eh_frame)) }	:text
	.dynamic	: { *(.dynamic) }		:text	:dynamic
	.rodata		: { *(.rodata*) }		:text
	.data : {
	      *(.got.plt) *(.got)
	} :text
	/DISCARD/ /* .data */: {
	      *(.data*)
	      *(.sdata*)
	      *(.gnu.linkonce.d.*)
	      *(.bss*)
	      *(.dynbss*)
	      *(.gnu.linkonce.b.*)
	      *(.ctors)
	      *(.dtors)
	      *(.jcr)
	      *(.init_array)
	      *(.init)
	      *(.fini)
	      *(.debug*)
	      *(.comment)
	}

	. = ALIGN(0x10);
	.text		: { *(.text .text*) }		:text	=0x90909090
}

VERSION
{
	FBSD_1.7 {
		global:
			__vdso_ia32_sigcode;
			__vdso_freebsd4_ia32_sigcode;
			__vdso_ia32_osigcode;
			__vdso_lcall_tramp;
		local:
			*;
	};
}