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1/* SPDX-License-Identifier: GPL-2.0-only */
2/*
3 * GNU linker script for the VDSO library.
4*
5 * Copyright (C) 2012 ARM Limited
6 *
7 * Author: Will Deacon <will.deacon@arm.com>
8 * Heavily based on the vDSO linker scripts for other archs.
9 */
10
11#include <linux/const.h>
12#include <asm/page.h>
13#include <asm/vdso.h>
14
15OUTPUT_FORMAT("elf64-littleaarch64", "elf64-bigaarch64", "elf64-littleaarch64")
16OUTPUT_ARCH(aarch64)
17
18SECTIONS
19{
20	PROVIDE(_vdso_data = . - __VVAR_PAGES * PAGE_SIZE);
21#ifdef CONFIG_TIME_NS
22	PROVIDE(_timens_data = _vdso_data + PAGE_SIZE);
23#endif
24	. = VDSO_LBASE + SIZEOF_HEADERS;
25
26	.hash		: { *(.hash) }			:text
27	.gnu.hash	: { *(.gnu.hash) }
28	.dynsym		: { *(.dynsym) }
29	.dynstr		: { *(.dynstr) }
30	.gnu.version	: { *(.gnu.version) }
31	.gnu.version_d	: { *(.gnu.version_d) }
32	.gnu.version_r	: { *(.gnu.version_r) }
33
34	/*
35	 * Discard .note.gnu.property sections which are unused and have
36	 * different alignment requirement from vDSO note sections.
37	 */
38	/DISCARD/	: {
39		*(.note.GNU-stack .note.gnu.property)
40	}
41	.note		: { *(.note.*) }		:text	:note
42
43	. = ALIGN(16);
44
45	.text		: { *(.text*) }			:text	=0xd503201f
46	PROVIDE (__etext = .);
47	PROVIDE (_etext = .);
48	PROVIDE (etext = .);
49
50	.dynamic	: { *(.dynamic) }		:text	:dynamic
51
52	.rodata		: { *(.rodata*) }		:text
53
54	_end = .;
55	PROVIDE(end = .);
56
57	/DISCARD/	: {
58		*(.data .data.* .gnu.linkonce.d.* .sdata*)
59		*(.bss .sbss .dynbss .dynsbss)
60		*(.eh_frame .eh_frame_hdr)
61	}
62}
63
64/*
65 * We must supply the ELF program headers explicitly to get just one
66 * PT_LOAD segment, and set the flags explicitly to make segments read-only.
67 */
68PHDRS
69{
70	text		PT_LOAD		FLAGS(5) FILEHDR PHDRS; /* PF_R|PF_X */
71	dynamic		PT_DYNAMIC	FLAGS(4);		/* PF_R */
72	note		PT_NOTE		FLAGS(4);		/* PF_R */
73}
74
75/*
76 * This controls what symbols we export from the DSO.
77 */
78VERSION
79{
80	LINUX_2.6.39 {
81	global:
82		__kernel_rt_sigreturn;
83		__kernel_gettimeofday;
84		__kernel_clock_gettime;
85		__kernel_clock_getres;
86	local: *;
87	};
88}
89
90/*
91 * Make the sigreturn code visible to the kernel.
92 */
93VDSO_sigtramp		= __kernel_rt_sigreturn;
94