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 15OUTPUT_FORMAT("elf64-littleaarch64", "elf64-bigaarch64", "elf64-littleaarch64") 16OUTPUT_ARCH(aarch64) 17 18SECTIONS 19{ 20 PROVIDE(_vdso_data = . - __VVAR_PAGES * PAGE_SIZE); 21#ifdef CONFIG_TIME_NS 22 PROVIDE(_timens_data = _vdso_data + PAGE_SIZE); 23#endif 24 . = VDSO_LBASE + SIZEOF_HEADERS; 25 26 .hash : { *(.hash) } :text 27 .gnu.hash : { *(.gnu.hash) } 28 .dynsym : { *(.dynsym) } 29 .dynstr : { *(.dynstr) } 30 .gnu.version : { *(.gnu.version) } 31 .gnu.version_d : { *(.gnu.version_d) } 32 .gnu.version_r : { *(.gnu.version_r) } 33 34 /* 35 * Discard .note.gnu.property sections which are unused and have 36 * different alignment requirement from vDSO note sections. 37 */ 38 /DISCARD/ : { 39 *(.note.GNU-stack .note.gnu.property) 40 } 41 .note : { *(.note.*) } :text :note 42 43 . = ALIGN(16); 44 45 .text : { *(.text*) } :text =0xd503201f 46 PROVIDE (__etext = .); 47 PROVIDE (_etext = .); 48 PROVIDE (etext = .); 49 50 .dynamic : { *(.dynamic) } :text :dynamic 51 52 .rodata : { *(.rodata*) } :text 53 54 _end = .; 55 PROVIDE(end = .); 56 57 /DISCARD/ : { 58 *(.data .data.* .gnu.linkonce.d.* .sdata*) 59 *(.bss .sbss .dynbss .dynsbss) 60 *(.eh_frame .eh_frame_hdr) 61 } 62} 63 64/* 65 * We must supply the ELF program headers explicitly to get just one 66 * PT_LOAD segment, and set the flags explicitly to make segments read-only. 67 */ 68PHDRS 69{ 70 text PT_LOAD FLAGS(5) FILEHDR PHDRS; /* PF_R|PF_X */ 71 dynamic PT_DYNAMIC FLAGS(4); /* PF_R */ 72 note PT_NOTE FLAGS(4); /* PF_R */ 73} 74 75/* 76 * This controls what symbols we export from the DSO. 77 */ 78VERSION 79{ 80 LINUX_2.6.39 { 81 global: 82 __kernel_rt_sigreturn; 83 __kernel_gettimeofday; 84 __kernel_clock_gettime; 85 __kernel_clock_getres; 86 local: *; 87 }; 88} 89 90/* 91 * Make the sigreturn code visible to the kernel. 92 */ 93VDSO_sigtramp = __kernel_rt_sigreturn; 94