1/* SPDX-License-Identifier: GPL-2.0 */ 2/* ld script to make s390 Linux kernel 3 * Written by Martin Schwidefsky (schwidefsky@de.ibm.com) 4 */ 5 6#include <asm/thread_info.h> 7#include <asm/page.h> 8#include <asm/ftrace.lds.h> 9 10/* 11 * Put .bss..swapper_pg_dir as the first thing in .bss. This will 12 * make sure it has 16k alignment. 13 */ 14#define BSS_FIRST_SECTIONS *(.bss..swapper_pg_dir) \ 15 *(.bss..invalid_pg_dir) 16 17/* Handle ro_after_init data on our own. */ 18#define RO_AFTER_INIT_DATA 19 20#define EMITS_PT_NOTE 21 22#include <asm-generic/vmlinux.lds.h> 23#include <asm/vmlinux.lds.h> 24 25OUTPUT_FORMAT("elf64-s390", "elf64-s390", "elf64-s390") 26OUTPUT_ARCH(s390:64-bit) 27ENTRY(startup_continue) 28jiffies = jiffies_64; 29 30PHDRS { 31 text PT_LOAD FLAGS(5); /* R_E */ 32 data PT_LOAD FLAGS(7); /* RWE */ 33 note PT_NOTE FLAGS(0); /* ___ */ 34} 35 36SECTIONS 37{ 38 . = 0x100000; 39 .text : { 40 _stext = .; /* Start of text section */ 41 _text = .; /* Text and read-only data */ 42 HEAD_TEXT 43 TEXT_TEXT 44 SCHED_TEXT 45 CPUIDLE_TEXT 46 LOCK_TEXT 47 KPROBES_TEXT 48 IRQENTRY_TEXT 49 SOFTIRQENTRY_TEXT 50 FTRACE_HOTPATCH_TRAMPOLINES_TEXT 51 *(.text.*_indirect_*) 52 *(.gnu.warning) 53 . = ALIGN(PAGE_SIZE); 54 _etext = .; /* End of text section */ 55 } :text = 0x0700 56 57 RO_DATA(PAGE_SIZE) 58 59 . = ALIGN(PAGE_SIZE); 60 _sdata = .; /* Start of data section */ 61 62 . = ALIGN(PAGE_SIZE); 63 __start_ro_after_init = .; 64 .data..ro_after_init : { 65 *(.data..ro_after_init) 66 JUMP_TABLE_DATA 67 } :data 68 EXCEPTION_TABLE(16) 69 . = ALIGN(PAGE_SIZE); 70 __end_ro_after_init = .; 71 72 RW_DATA(0x100, PAGE_SIZE, THREAD_SIZE) 73 BOOT_DATA_PRESERVED 74 75 . = ALIGN(8); 76 .amode31.refs : { 77 _start_amode31_refs = .; 78 *(.amode31.refs) 79 _end_amode31_refs = .; 80 } 81 82 _edata = .; /* End of data section */ 83 84 /* will be freed after init */ 85 . = ALIGN(PAGE_SIZE); /* Init code and data */ 86 __init_begin = .; 87 88 . = ALIGN(PAGE_SIZE); 89 .init.text : AT(ADDR(.init.text) - LOAD_OFFSET) { 90 _sinittext = .; 91 INIT_TEXT 92 . = ALIGN(PAGE_SIZE); 93 _einittext = .; 94 } 95 96 /* 97 * .exit.text is discarded at runtime, not link time, 98 * to deal with references from __bug_table 99 */ 100 .exit.text : { 101 EXIT_TEXT 102 } 103 104 .exit.data : { 105 EXIT_DATA 106 } 107 108 /* 109 * struct alt_inst entries. From the header (alternative.h): 110 * "Alternative instructions for different CPU types or capabilities" 111 * Think locking instructions on spinlocks. 112 * Note, that it is a part of __init region. 113 */ 114 . = ALIGN(8); 115 .altinstructions : { 116 __alt_instructions = .; 117 *(.altinstructions) 118 __alt_instructions_end = .; 119 } 120 121 /* 122 * And here are the replacement instructions. The linker sticks 123 * them as binary blobs. The .altinstructions has enough data to 124 * get the address and the length of them to patch the kernel safely. 125 * Note, that it is a part of __init region. 126 */ 127 .altinstr_replacement : { 128 *(.altinstr_replacement) 129 } 130 131 /* 132 * Table with the patch locations to undo expolines 133 */ 134 . = ALIGN(4); 135 .nospec_call_table : { 136 __nospec_call_start = . ; 137 *(.s390_indirect*) 138 __nospec_call_end = . ; 139 } 140 .nospec_return_table : { 141 __nospec_return_start = . ; 142 *(.s390_return*) 143 __nospec_return_end = . ; 144 } 145 146 BOOT_DATA 147 148 /* 149 * .amode31 section for code, data, ex_table that need to stay 150 * below 2 GB, even when the kernel is relocated above 2 GB. 151 */ 152 . = ALIGN(PAGE_SIZE); 153 _samode31 = .; 154 .amode31.text : { 155 _stext_amode31 = .; 156 *(.amode31.text) 157 *(.amode31.text.*_indirect_*) 158 . = ALIGN(PAGE_SIZE); 159 _etext_amode31 = .; 160 } 161 . = ALIGN(16); 162 .amode31.ex_table : { 163 _start_amode31_ex_table = .; 164 KEEP(*(.amode31.ex_table)) 165 _stop_amode31_ex_table = .; 166 } 167 . = ALIGN(PAGE_SIZE); 168 .amode31.data : { 169 *(.amode31.data) 170 } 171 . = ALIGN(PAGE_SIZE); 172 _eamode31 = .; 173 174 /* early.c uses stsi, which requires page aligned data. */ 175 . = ALIGN(PAGE_SIZE); 176 INIT_DATA_SECTION(0x100) 177 178 PERCPU_SECTION(0x100) 179 180 .dynsym ALIGN(8) : { 181 __dynsym_start = .; 182 *(.dynsym) 183 __dynsym_end = .; 184 } 185 .rela.dyn ALIGN(8) : { 186 __rela_dyn_start = .; 187 *(.rela*) 188 __rela_dyn_end = .; 189 } 190 191 . = ALIGN(PAGE_SIZE); 192 __init_end = .; /* freed after init ends here */ 193 194 BSS_SECTION(PAGE_SIZE, 4 * PAGE_SIZE, PAGE_SIZE) 195 196 _end = . ; 197 198 /* 199 * uncompressed image info used by the decompressor 200 * it should match struct vmlinux_info 201 */ 202 .vmlinux.info 0 (INFO) : { 203 QUAD(_stext) /* default_lma */ 204 QUAD(startup_continue) /* entry */ 205 QUAD(__bss_start - _stext) /* image_size */ 206 QUAD(__bss_stop - __bss_start) /* bss_size */ 207 QUAD(__boot_data_start) /* bootdata_off */ 208 QUAD(__boot_data_end - __boot_data_start) /* bootdata_size */ 209 QUAD(__boot_data_preserved_start) /* bootdata_preserved_off */ 210 QUAD(__boot_data_preserved_end - 211 __boot_data_preserved_start) /* bootdata_preserved_size */ 212 QUAD(__dynsym_start) /* dynsym_start */ 213 QUAD(__rela_dyn_start) /* rela_dyn_start */ 214 QUAD(__rela_dyn_end) /* rela_dyn_end */ 215 QUAD(_eamode31 - _samode31) /* amode31_size */ 216 } :NONE 217 218 /* Debugging sections. */ 219 STABS_DEBUG 220 DWARF_DEBUG 221 ELF_DETAILS 222 223 /* Sections to be discarded */ 224 DISCARDS 225 /DISCARD/ : { 226 *(.eh_frame) 227 } 228} 229