1/* SPDX-License-Identifier: GPL-2.0-only */ 2/* 3 * GNU linker script for the VDSO library. 4* 5 * Copyright (C) 2012 ARM Limited 6 * 7 * Author: Will Deacon <will.deacon@arm.com> 8 * Heavily based on the vDSO linker scripts for other archs. 9 */ 10 11#include <linux/const.h> 12#include <asm/page.h> 13#include <asm/vdso.h> 14#include <asm/vdso/vsyscall.h> 15#include <asm-generic/vmlinux.lds.h> 16#include <vdso/datapage.h> 17 18OUTPUT_FORMAT("elf64-littleaarch64", "elf64-bigaarch64", "elf64-littleaarch64") 19OUTPUT_ARCH(aarch64) 20 21SECTIONS 22{ 23 PROVIDE(_vdso_data = . - __VVAR_PAGES * PAGE_SIZE); 24 PROVIDE(_vdso_rng_data = _vdso_data + __VDSO_RND_DATA_OFFSET); 25#ifdef CONFIG_TIME_NS 26 PROVIDE(_timens_data = _vdso_data + PAGE_SIZE); 27#endif 28 . = SIZEOF_HEADERS; 29 30 .hash : { *(.hash) } :text 31 .gnu.hash : { *(.gnu.hash) } 32 .dynsym : { *(.dynsym) } 33 .dynstr : { *(.dynstr) } 34 .gnu.version : { *(.gnu.version) } 35 .gnu.version_d : { *(.gnu.version_d) } 36 .gnu.version_r : { *(.gnu.version_r) } 37 38 /* 39 * Discard .note.gnu.property sections which are unused and have 40 * different alignment requirement from vDSO note sections. 41 */ 42 /DISCARD/ : { 43 *(.note.GNU-stack .note.gnu.property) 44 } 45 .note : { *(.note.*) } :text :note 46 47 . = ALIGN(16); 48 49 .text : { *(.text*) } :text =0xd503201f 50 PROVIDE (__etext = .); 51 PROVIDE (_etext = .); 52 PROVIDE (etext = .); 53 54 . = ALIGN(4); 55 .altinstructions : { 56 *(.altinstructions) 57 } 58 59 .dynamic : { *(.dynamic) } :text :dynamic 60 61 .rela.dyn : ALIGN(8) { *(.rela .rela*) } 62 63 .rodata : { 64 *(.rodata*) 65 *(.got) 66 *(.got.plt) 67 *(.plt) 68 *(.plt.*) 69 *(.iplt) 70 *(.igot .igot.plt) 71 } :text 72 73 _end = .; 74 PROVIDE(end = .); 75 76 DWARF_DEBUG 77 ELF_DETAILS 78 79 /DISCARD/ : { 80 *(.data .data.* .gnu.linkonce.d.* .sdata*) 81 *(.bss .sbss .dynbss .dynsbss) 82 *(.eh_frame .eh_frame_hdr) 83 } 84} 85 86/* 87 * We must supply the ELF program headers explicitly to get just one 88 * PT_LOAD segment, and set the flags explicitly to make segments read-only. 89 */ 90PHDRS 91{ 92 text PT_LOAD FLAGS(5) FILEHDR PHDRS; /* PF_R|PF_X */ 93 dynamic PT_DYNAMIC FLAGS(4); /* PF_R */ 94 note PT_NOTE FLAGS(4); /* PF_R */ 95} 96 97/* 98 * This controls what symbols we export from the DSO. 99 */ 100VERSION 101{ 102 LINUX_2.6.39 { 103 global: 104 __kernel_rt_sigreturn; 105 __kernel_gettimeofday; 106 __kernel_clock_gettime; 107 __kernel_clock_getres; 108 __kernel_getrandom; 109 local: *; 110 }; 111} 112 113/* 114 * Make the sigreturn code visible to the kernel. 115 */ 116VDSO_sigtramp = __kernel_rt_sigreturn; 117