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 RUNTIME_DISCARD_EXIT 21 22#define EMITS_PT_NOTE 23 24#include <asm-generic/vmlinux.lds.h> 25#include <asm/vmlinux.lds.h> 26 27OUTPUT_FORMAT("elf64-s390", "elf64-s390", "elf64-s390") 28OUTPUT_ARCH(s390:64-bit) 29ENTRY(startup_continue) 30jiffies = jiffies_64; 31 32PHDRS { 33 text PT_LOAD FLAGS(5); /* R_E */ 34 data PT_LOAD FLAGS(7); /* RWE */ 35 note PT_NOTE FLAGS(0); /* ___ */ 36} 37 38SECTIONS 39{ 40 . = 0x100000; 41 .text : { 42 _stext = .; /* Start of text section */ 43 _text = .; /* Text and read-only data */ 44 HEAD_TEXT 45 TEXT_TEXT 46 SCHED_TEXT 47 CPUIDLE_TEXT 48 LOCK_TEXT 49 KPROBES_TEXT 50 IRQENTRY_TEXT 51 SOFTIRQENTRY_TEXT 52 FTRACE_HOTPATCH_TRAMPOLINES_TEXT 53 *(.text.*_indirect_*) 54 *(.gnu.warning) 55 . = ALIGN(PAGE_SIZE); 56 _etext = .; /* End of text section */ 57 } :text = 0x0700 58 59 RO_DATA(PAGE_SIZE) 60 61 . = ALIGN(PAGE_SIZE); 62 _sdata = .; /* Start of data section */ 63 64 . = ALIGN(PAGE_SIZE); 65 __start_ro_after_init = .; 66 .data..ro_after_init : { 67 *(.data..ro_after_init) 68 JUMP_TABLE_DATA 69 } :data 70 EXCEPTION_TABLE(16) 71 . = ALIGN(PAGE_SIZE); 72 __end_ro_after_init = .; 73 74 RW_DATA(0x100, PAGE_SIZE, THREAD_SIZE) 75 BOOT_DATA_PRESERVED 76 77 . = ALIGN(8); 78 .amode31.refs : { 79 _start_amode31_refs = .; 80 *(.amode31.refs) 81 _end_amode31_refs = .; 82 } 83 84 . = ALIGN(PAGE_SIZE); 85 _edata = .; /* End of data section */ 86 87 /* will be freed after init */ 88 . = ALIGN(PAGE_SIZE); /* Init code and data */ 89 __init_begin = .; 90 91 . = ALIGN(PAGE_SIZE); 92 .init.text : AT(ADDR(.init.text) - LOAD_OFFSET) { 93 _sinittext = .; 94 INIT_TEXT 95 . = ALIGN(PAGE_SIZE); 96 _einittext = .; 97 } 98 99 /* 100 * .exit.text is discarded at runtime, not link time, 101 * to deal with references from __bug_table 102 */ 103 .exit.text : { 104 EXIT_TEXT 105 } 106 107 .exit.data : { 108 EXIT_DATA 109 } 110 111 /* 112 * struct alt_inst entries. From the header (alternative.h): 113 * "Alternative instructions for different CPU types or capabilities" 114 * Think locking instructions on spinlocks. 115 * Note, that it is a part of __init region. 116 */ 117 . = ALIGN(8); 118 .altinstructions : { 119 __alt_instructions = .; 120 *(.altinstructions) 121 __alt_instructions_end = .; 122 } 123 124 /* 125 * And here are the replacement instructions. The linker sticks 126 * them as binary blobs. The .altinstructions has enough data to 127 * get the address and the length of them to patch the kernel safely. 128 * Note, that it is a part of __init region. 129 */ 130 .altinstr_replacement : { 131 *(.altinstr_replacement) 132 } 133 134 /* 135 * Table with the patch locations to undo expolines 136 */ 137 . = ALIGN(4); 138 .nospec_call_table : { 139 __nospec_call_start = . ; 140 *(.s390_indirect*) 141 __nospec_call_end = . ; 142 } 143 .nospec_return_table : { 144 __nospec_return_start = . ; 145 *(.s390_return*) 146 __nospec_return_end = . ; 147 } 148 149 BOOT_DATA 150 151 /* 152 * .amode31 section for code, data, ex_table that need to stay 153 * below 2 GB, even when the kernel is relocated above 2 GB. 154 */ 155 . = ALIGN(PAGE_SIZE); 156 _samode31 = .; 157 .amode31.text : { 158 _stext_amode31 = .; 159 *(.amode31.text) 160 *(.amode31.text.*_indirect_*) 161 . = ALIGN(PAGE_SIZE); 162 _etext_amode31 = .; 163 } 164 . = ALIGN(16); 165 .amode31.ex_table : { 166 _start_amode31_ex_table = .; 167 KEEP(*(.amode31.ex_table)) 168 _stop_amode31_ex_table = .; 169 } 170 . = ALIGN(PAGE_SIZE); 171 .amode31.data : { 172 *(.amode31.data) 173 } 174 . = ALIGN(PAGE_SIZE); 175 _eamode31 = .; 176 177 /* early.c uses stsi, which requires page aligned data. */ 178 . = ALIGN(PAGE_SIZE); 179 INIT_DATA_SECTION(0x100) 180 181 PERCPU_SECTION(0x100) 182 183 .dynsym ALIGN(8) : { 184 __dynsym_start = .; 185 *(.dynsym) 186 __dynsym_end = .; 187 } 188 .rela.dyn ALIGN(8) : { 189 __rela_dyn_start = .; 190 *(.rela*) 191 __rela_dyn_end = .; 192 } 193 194 . = ALIGN(PAGE_SIZE); 195 __init_end = .; /* freed after init ends here */ 196 197 BSS_SECTION(PAGE_SIZE, 4 * PAGE_SIZE, PAGE_SIZE) 198 199 . = ALIGN(PAGE_SIZE); 200 _end = . ; 201 202 /* 203 * uncompressed image info used by the decompressor 204 * it should match struct vmlinux_info 205 */ 206 .vmlinux.info 0 (INFO) : { 207 QUAD(_stext) /* default_lma */ 208 QUAD(startup_continue) /* entry */ 209 QUAD(__bss_start - _stext) /* image_size */ 210 QUAD(__bss_stop - __bss_start) /* bss_size */ 211 QUAD(__boot_data_start) /* bootdata_off */ 212 QUAD(__boot_data_end - __boot_data_start) /* bootdata_size */ 213 QUAD(__boot_data_preserved_start) /* bootdata_preserved_off */ 214 QUAD(__boot_data_preserved_end - 215 __boot_data_preserved_start) /* bootdata_preserved_size */ 216 QUAD(__dynsym_start) /* dynsym_start */ 217 QUAD(__rela_dyn_start) /* rela_dyn_start */ 218 QUAD(__rela_dyn_end) /* rela_dyn_end */ 219 QUAD(_eamode31 - _samode31) /* amode31_size */ 220 } :NONE 221 222 /* Debugging sections. */ 223 STABS_DEBUG 224 DWARF_DEBUG 225 ELF_DETAILS 226 227 /* Sections to be discarded */ 228 DISCARDS 229 /DISCARD/ : { 230 *(.eh_frame) 231 } 232} 233