linux-phytium/arch/riscv/kernel/vdso/vdso.lds.S

/*
 * Copyright (C) 2012 Regents of the University of California
 *
 *   This program is free software; you can redistribute it and/or
 *   modify it under the terms of the GNU General Public License
 *   as published by the Free Software Foundation, version 2.
 *
 *   This program is distributed in the hope that it will be useful,
 *   but WITHOUT ANY WARRANTY; without even the implied warranty of
 *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *   GNU General Public License for more details.
 */

OUTPUT_ARCH(riscv)

SECTIONS
{
	. = SIZEOF_HEADERS;

	.hash		: { *(.hash) }			:text
	.gnu.hash	: { *(.gnu.hash) }
	.dynsym		: { *(.dynsym) }
	.dynstr		: { *(.dynstr) }
	.gnu.version	: { *(.gnu.version) }
	.gnu.version_d	: { *(.gnu.version_d) }
	.gnu.version_r	: { *(.gnu.version_r) }

	.note		: { *(.note.*) }		:text	:note
	.dynamic	: { *(.dynamic) }		:text	:dynamic

	.eh_frame_hdr	: { *(.eh_frame_hdr) }		:text	:eh_frame_hdr
	.eh_frame	: { KEEP (*(.eh_frame)) }	:text

	.rodata		: { *(.rodata .rodata.* .gnu.linkonce.r.*) }

	/*
	 * This linker script is used both with -r and with -shared.
	 * For the layouts to match, we need to skip more than enough
	 * space for the dynamic symbol table, etc. If this amount is
	 * insufficient, ld -shared will error; simply increase it here.
	 */
	. = 0x800;
	.text		: { *(.text .text.*) }		:text

	.data		: {
		*(.got.plt) *(.got)
		*(.data .data.* .gnu.linkonce.d.*)
		*(.dynbss)
		*(.bss .bss.* .gnu.linkonce.b.*)
	}
}

/*
 * We must supply the ELF program headers explicitly to get just one
 * PT_LOAD segment, and set the flags explicitly to make segments read-only.
 */
PHDRS
{
	text		PT_LOAD		FLAGS(5) FILEHDR PHDRS; /* PF_R|PF_X */
	dynamic		PT_DYNAMIC	FLAGS(4);		/* PF_R */
	note		PT_NOTE		FLAGS(4);		/* PF_R */
	eh_frame_hdr	PT_GNU_EH_FRAME;
}

/*
 * This controls what symbols we export from the DSO.
 */
VERSION
{
	LINUX_4.15 {
	global:
		__vdso_rt_sigreturn;
		__vdso_gettimeofday;
		__vdso_clock_gettime;
		__vdso_clock_getres;
		__vdso_getcpu;
		__vdso_flush_icache;
	local: *;
	};
}