blob: f2e75ed4c6c757caca14fa19cb488e75d97f685e [file] [log] [blame]
Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
2 * Linker script for vsyscall DSO. The vsyscall page is an ELF shared
3 * object prelinked to its virtual address. This script controls its layout.
4 */
5
6/* This must match <asm/fixmap.h>. */
7VSYSCALL_BASE = 0xffffe000;
8
9SECTIONS
10{
11 . = VSYSCALL_BASE + SIZEOF_HEADERS;
12
13 .hash : { *(.hash) } :text
14 .dynsym : { *(.dynsym) }
15 .dynstr : { *(.dynstr) }
16 .gnu.version : { *(.gnu.version) }
17 .gnu.version_d : { *(.gnu.version_d) }
18 .gnu.version_r : { *(.gnu.version_r) }
19
20 /* This linker script is used both with -r and with -shared.
21 For the layouts to match, we need to skip more than enough
22 space for the dynamic symbol table et al. If this amount
23 is insufficient, ld -shared will barf. Just increase it here. */
24 . = VSYSCALL_BASE + 0x400;
25
26 .text.vsyscall : { *(.text.vsyscall) } :text =0x90909090
27
28 /* This is an 32bit object and we cannot easily get the offsets
29 into the 64bit kernel. Just hardcode them here. This assumes
30 that all the stubs don't need more than 0x100 bytes. */
31 . = VSYSCALL_BASE + 0x500;
32
33 .text.sigreturn : { *(.text.sigreturn) } :text =0x90909090
34
35 . = VSYSCALL_BASE + 0x600;
36
37 .text.rtsigreturn : { *(.text.rtsigreturn) } :text =0x90909090
38
Roland McGrathc60c3902005-04-28 22:47:29 -070039 .note : { *(.note.*) } :text :note
Linus Torvalds1da177e2005-04-16 15:20:36 -070040 .eh_frame_hdr : { *(.eh_frame_hdr) } :text :eh_frame_hdr
41 .eh_frame : { KEEP (*(.eh_frame)) } :text
42 .dynamic : { *(.dynamic) } :text :dynamic
43 .useless : {
44 *(.got.plt) *(.got)
45 *(.data .data.* .gnu.linkonce.d.*)
46 *(.dynbss)
47 *(.bss .bss.* .gnu.linkonce.b.*)
48 } :text
49}
50
51/*
52 * We must supply the ELF program headers explicitly to get just one
53 * PT_LOAD segment, and set the flags explicitly to make segments read-only.
54 */
55PHDRS
56{
57 text PT_LOAD FILEHDR PHDRS FLAGS(5); /* PF_R|PF_X */
58 dynamic PT_DYNAMIC FLAGS(4); /* PF_R */
Roland McGrathc60c3902005-04-28 22:47:29 -070059 note PT_NOTE FLAGS(4); /* PF_R */
Linus Torvalds1da177e2005-04-16 15:20:36 -070060 eh_frame_hdr 0x6474e550; /* PT_GNU_EH_FRAME, but ld doesn't match the name */
61}
62
63/*
64 * This controls what symbols we export from the DSO.
65 */
66VERSION
67{
68 LINUX_2.5 {
69 global:
70 __kernel_vsyscall;
71 __kernel_sigreturn;
72 __kernel_rt_sigreturn;
73
74 local: *;
75 };
76}
77
78/* The ELF entry point can be used to set the AT_SYSINFO value. */
79ENTRY(__kernel_vsyscall);