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