1/* SPDX-License-Identifier: GPL-2.0 */ 2#include <asm/vdso.h> 3 4/* 5 * Linker script for vDSO. This is an ELF shared object prelinked to 6 * its virtual address, and with only one read-only segment. 7 * This script controls its layout. 8 */ 9 10SECTIONS 11{ 12 /* 13 * User/kernel shared data is before the vDSO. This may be a little 14 * uglier than putting it after the vDSO, but it avoids issues with 15 * non-allocatable things that dangle past the end of the PT_LOAD 16 * segment. 17 */ 18 19 vvar_start = . - 3 * PAGE_SIZE; 20 vvar_page = vvar_start; 21 22 /* Place all vvars at the offsets in asm/vvar.h. */ 23#define EMIT_VVAR(name, offset) vvar_ ## name = vvar_page + offset; 24#define __VVAR_KERNEL_LDS 25#include <asm/vvar.h> 26#undef __VVAR_KERNEL_LDS 27#undef EMIT_VVAR 28 29 pvclock_page = vvar_start + PAGE_SIZE; 30 hvclock_page = vvar_start + 2 * PAGE_SIZE; 31 32 . = SIZEOF_HEADERS; 33 34 .hash : { *(.hash) } :text 35 .gnu.hash : { *(.gnu.hash) } 36 .dynsym : { *(.dynsym) } 37 .dynstr : { *(.dynstr) } 38 .gnu.version : { *(.gnu.version) } 39 .gnu.version_d : { *(.gnu.version_d) } 40 .gnu.version_r : { *(.gnu.version_r) } 41 42 .dynamic : { *(.dynamic) } :text :dynamic 43 44 .rodata : { 45 *(.rodata*) 46 *(.data*) 47 *(.sdata*) 48 *(.got.plt) *(.got) 49 *(.gnu.linkonce.d.*) 50 *(.bss*) 51 *(.dynbss*) 52 *(.gnu.linkonce.b.*) 53 } :text 54 55 .note : { *(.note.*) } :text :note 56 57 .eh_frame_hdr : { *(.eh_frame_hdr) } :text :eh_frame_hdr 58 .eh_frame : { KEEP (*(.eh_frame)) } :text 59 60 61 /* 62 * Text is well-separated from actual data: there's plenty of 63 * stuff that isn't used at runtime in between. 64 */ 65 66 .text : { *(.text*) } :text =0x90909090, 67 68 .altinstructions : { *(.altinstructions) } :text 69 .altinstr_replacement : { *(.altinstr_replacement) } :text 70 71 /DISCARD/ : { 72 *(.discard) 73 *(.discard.*) 74 *(__bug_table) 75 } 76} 77 78/* 79 * Very old versions of ld do not recognize this name token; use the constant. 80 */ 81#define PT_GNU_EH_FRAME 0x6474e550 82 83/* 84 * We must supply the ELF program headers explicitly to get just one 85 * PT_LOAD segment, and set the flags explicitly to make segments read-only. 86 */ 87PHDRS 88{ 89 text PT_LOAD FLAGS(5) FILEHDR PHDRS; /* PF_R|PF_X */ 90 dynamic PT_DYNAMIC FLAGS(4); /* PF_R */ 91 note PT_NOTE FLAGS(4); /* PF_R */ 92 eh_frame_hdr PT_GNU_EH_FRAME; 93} 94