1/* SPDX-License-Identifier: GPL-2.0 */
2#include <asm/vdso.h>
3#include <asm/vdso/vsyscall.h>
4#include <vdso/datapage.h>
5
6/*
7 * Linker script for vDSO.  This is an ELF shared object prelinked to
8 * its virtual address, and with only one read-only segment.
9 * This script controls its layout.
10 */
11
12SECTIONS
13{
14	/*
15	 * User/kernel shared data is before the vDSO.  This may be a little
16	 * uglier than putting it after the vDSO, but it avoids issues with
17	 * non-allocatable things that dangle past the end of the PT_LOAD
18	 * segment.
19	 */
20
21	VDSO_VVAR_SYMS
22
23	vclock_pages = VDSO_VCLOCK_PAGES_START(vdso_u_data);
24	pvclock_page = vclock_pages + VDSO_PAGE_PVCLOCK_OFFSET * PAGE_SIZE;
25	hvclock_page = vclock_pages + VDSO_PAGE_HVCLOCK_OFFSET * PAGE_SIZE;
26
27	. = SIZEOF_HEADERS;
28
29	.hash		: { *(.hash) }			:text
30	.gnu.hash	: { *(.gnu.hash) }
31	.dynsym		: { *(.dynsym) }
32	.dynstr		: { *(.dynstr) }
33	.gnu.version	: { *(.gnu.version) }
34	.gnu.version_d	: { *(.gnu.version_d) }
35	.gnu.version_r	: { *(.gnu.version_r) }
36
37	.dynamic	: { *(.dynamic) }		:text	:dynamic
38
39	.rodata		: {
40		*(.rodata*)
41		*(.data*)
42		*(.sdata*)
43		*(.got.plt) *(.got)
44		*(.gnu.linkonce.d.*)
45		*(.bss*)
46		*(.dynbss*)
47		*(.gnu.linkonce.b.*)
48	}						:text
49
50	/*
51	 * Discard .note.gnu.property sections which are unused and have
52	 * different alignment requirement from vDSO note sections.
53	 */
54	/DISCARD/ : {
55		*(.note.gnu.property)
56	}
57	.note		: { *(.note.*) }		:text	:note
58
59	.eh_frame_hdr	: { *(.eh_frame_hdr) }		:text	:eh_frame_hdr
60	.eh_frame	: { KEEP (*(.eh_frame)) }	:text
61
62
63	/*
64	 * Text is well-separated from actual data: there's plenty of
65	 * stuff that isn't used at runtime in between.
66	 */
67
68	.text		: {
69		*(.text*)
70	}						:text	=0x90909090,
71
72
73
74	.altinstructions	: { *(.altinstructions) }	:text
75	.altinstr_replacement	: { *(.altinstr_replacement) }	:text
76
77	__ex_table		: { *(__ex_table) }		:text
78
79	/DISCARD/ : {
80		*(.discard)
81		*(.discard.*)
82		*(__bug_table)
83	}
84}
85
86/*
87 * Very old versions of ld do not recognize this name token; use the constant.
88 */
89#define PT_GNU_EH_FRAME	0x6474e550
90
91/*
92 * We must supply the ELF program headers explicitly to get just one
93 * PT_LOAD segment, and set the flags explicitly to make segments read-only.
94 */
95PHDRS
96{
97	text		PT_LOAD		FLAGS(5) FILEHDR PHDRS; /* PF_R|PF_X */
98	dynamic		PT_DYNAMIC	FLAGS(4);		/* PF_R */
99	note		PT_NOTE		FLAGS(4);		/* PF_R */
100	eh_frame_hdr	PT_GNU_EH_FRAME;
101}
102