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 .note.gnu.property : { 51 *(.note.gnu.property) 52 } :text :note :gnu_property 53 .note : { 54 *(.note*) 55 } :text :note 56 57 .eh_frame_hdr : { *(.eh_frame_hdr) } :text :eh_frame_hdr 58 .eh_frame : { 59 KEEP (*(.eh_frame)) 60 *(.eh_frame.*) 61 } :text 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#define PT_GNU_STACK 0x6474e551 91#define PT_GNU_PROPERTY 0x6474e553 92 93/* 94 * We must supply the ELF program headers explicitly to get just one 95 * PT_LOAD segment, and set the flags explicitly to make segments read-only. 96*/ 97#define PF_R FLAGS(4) 98#define PF_RW FLAGS(6) 99#define PF_RX FLAGS(5) 100 101PHDRS 102{ 103 text PT_LOAD PF_RX FILEHDR PHDRS; 104 dynamic PT_DYNAMIC PF_R; 105 note PT_NOTE PF_R; 106 eh_frame_hdr PT_GNU_EH_FRAME PF_R; 107 gnu_stack PT_GNU_STACK PF_RW; 108 gnu_property PT_GNU_PROPERTY PF_R; 109} 110