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 .note : { *(.note.*) } :text :note 35 36 . = ALIGN(16); 37 38 .text : { *(.text*) } :text =0xd503201f 39 PROVIDE (__etext = .); 40 PROVIDE (_etext = .); 41 PROVIDE (etext = .); 42 43 .eh_frame_hdr : { *(.eh_frame_hdr) } :text :eh_frame_hdr 44 .eh_frame : { KEEP (*(.eh_frame)) } :text 45 46 .dynamic : { *(.dynamic) } :text :dynamic 47 48 .rodata : { *(.rodata*) } :text 49 50 _end = .; 51 PROVIDE(end = .); 52 53 /DISCARD/ : { 54 *(.note.GNU-stack) 55 *(.data .data.* .gnu.linkonce.d.* .sdata*) 56 *(.bss .sbss .dynbss .dynsbss) 57 } 58} 59 60/* 61 * We must supply the ELF program headers explicitly to get just one 62 * PT_LOAD segment, and set the flags explicitly to make segments read-only. 63 */ 64PHDRS 65{ 66 text PT_LOAD FLAGS(5) FILEHDR PHDRS; /* PF_R|PF_X */ 67 dynamic PT_DYNAMIC FLAGS(4); /* PF_R */ 68 note PT_NOTE FLAGS(4); /* PF_R */ 69 eh_frame_hdr PT_GNU_EH_FRAME; 70} 71 72/* 73 * This controls what symbols we export from the DSO. 74 */ 75VERSION 76{ 77 LINUX_2.6.39 { 78 global: 79 __kernel_rt_sigreturn; 80 __kernel_gettimeofday; 81 __kernel_clock_gettime; 82 __kernel_clock_getres; 83 local: *; 84 }; 85} 86 87/* 88 * Make the sigreturn code visible to the kernel. 89 */ 90VDSO_sigtramp = __kernel_rt_sigreturn; 91