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1 | /* |
2 | * GNU linker script for the VDSO library. | |
3 | * | |
4 | * Copyright (C) 2012 ARM Limited | |
5 | * | |
6 | * This program is free software; you can redistribute it and/or modify | |
7 | * it under the terms of the GNU General Public License version 2 as | |
8 | * published by the Free Software Foundation. | |
9 | * | |
10 | * This program is distributed in the hope that it will be useful, | |
11 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
12 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
13 | * GNU General Public License for more details. | |
14 | * | |
15 | * You should have received a copy of the GNU General Public License | |
16 | * along with this program. If not, see <http://www.gnu.org/licenses/>. | |
17 | * | |
18 | * Author: Will Deacon <will.deacon@arm.com> | |
19 | * Heavily based on the vDSO linker scripts for other archs. | |
20 | */ | |
21 | ||
22 | #include <linux/const.h> | |
23 | #include <asm/page.h> | |
24 | #include <asm/vdso.h> | |
25 | ||
26 | OUTPUT_FORMAT("elf64-littleaarch64", "elf64-bigaarch64", "elf64-littleaarch64") | |
27 | OUTPUT_ARCH(aarch64) | |
28 | ||
29 | SECTIONS | |
30 | { | |
601255ae | 31 | PROVIDE(_vdso_data = . - PAGE_SIZE); |
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32 | . = VDSO_LBASE + 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 | .note : { *(.note.*) } :text :note | |
43 | ||
44 | . = ALIGN(16); | |
45 | ||
46 | .text : { *(.text*) } :text =0xd503201f | |
47 | PROVIDE (__etext = .); | |
48 | PROVIDE (_etext = .); | |
49 | PROVIDE (etext = .); | |
50 | ||
51 | .eh_frame_hdr : { *(.eh_frame_hdr) } :text :eh_frame_hdr | |
52 | .eh_frame : { KEEP (*(.eh_frame)) } :text | |
53 | ||
54 | .dynamic : { *(.dynamic) } :text :dynamic | |
55 | ||
56 | .rodata : { *(.rodata*) } :text | |
57 | ||
58 | _end = .; | |
59 | PROVIDE(end = .); | |
60 | ||
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61 | /DISCARD/ : { |
62 | *(.note.GNU-stack) | |
63 | *(.data .data.* .gnu.linkonce.d.* .sdata*) | |
64 | *(.bss .sbss .dynbss .dynsbss) | |
65 | } | |
66 | } | |
67 | ||
68 | /* | |
69 | * We must supply the ELF program headers explicitly to get just one | |
70 | * PT_LOAD segment, and set the flags explicitly to make segments read-only. | |
71 | */ | |
72 | PHDRS | |
73 | { | |
74 | text PT_LOAD FLAGS(5) FILEHDR PHDRS; /* PF_R|PF_X */ | |
75 | dynamic PT_DYNAMIC FLAGS(4); /* PF_R */ | |
76 | note PT_NOTE FLAGS(4); /* PF_R */ | |
77 | eh_frame_hdr PT_GNU_EH_FRAME; | |
78 | } | |
79 | ||
80 | /* | |
81 | * This controls what symbols we export from the DSO. | |
82 | */ | |
83 | VERSION | |
84 | { | |
85 | LINUX_2.6.39 { | |
86 | global: | |
87 | __kernel_rt_sigreturn; | |
88 | __kernel_gettimeofday; | |
89 | __kernel_clock_gettime; | |
90 | __kernel_clock_getres; | |
f5f95150 | 91 | __kernel_time; |
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92 | local: *; |
93 | }; | |
94 | } | |
95 | ||
96 | /* | |
97 | * Make the sigreturn code visible to the kernel. | |
98 | */ | |
99 | VDSO_sigtramp = __kernel_rt_sigreturn; |