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 LOCK_TEXT 48 KPROBES_TEXT 49 IRQENTRY_TEXT 50 SOFTIRQENTRY_TEXT 51 FTRACE_HOTPATCH_TRAMPOLINES_TEXT 52 *(.text.*_indirect_*) 53 *(.gnu.warning) 54 . = ALIGN(PAGE_SIZE); 55 _etext = .; /* End of text section */ 56 } :text = 0x0700 57 58 RO_DATA(PAGE_SIZE) 59 60 . = ALIGN(PAGE_SIZE); 61 _sdata = .; /* Start of data section */ 62 63 . = ALIGN(PAGE_SIZE); 64 __start_ro_after_init = .; 65 .data..ro_after_init : { 66 *(.data..ro_after_init) 67 JUMP_TABLE_DATA 68 } :data 69 EXCEPTION_TABLE(16) 70 . = ALIGN(PAGE_SIZE); 71 __end_ro_after_init = .; 72 73 RW_DATA(0x100, PAGE_SIZE, THREAD_SIZE) 74 BOOT_DATA_PRESERVED 75 76 . = ALIGN(8); 77 .amode31.refs : { 78 _start_amode31_refs = .; 79 *(.amode31.refs) 80 _end_amode31_refs = .; 81 } 82 83 . = ALIGN(PAGE_SIZE); 84 _edata = .; /* End of data section */ 85 86 /* will be freed after init */ 87 . = ALIGN(PAGE_SIZE); /* Init code and data */ 88 __init_begin = .; 89 90 . = ALIGN(PAGE_SIZE); 91 .init.text : AT(ADDR(.init.text) - LOAD_OFFSET) { 92 _sinittext = .; 93 INIT_TEXT 94 . = ALIGN(PAGE_SIZE); 95 _einittext = .; 96 } 97 98 /* 99 * .exit.text is discarded at runtime, not link time, 100 * to deal with references from __bug_table 101 */ 102 .exit.text : { 103 EXIT_TEXT 104 } 105 106 .exit.data : { 107 EXIT_DATA 108 } 109 110 /* 111 * struct alt_inst entries. From the header (alternative.h): 112 * "Alternative instructions for different CPU types or capabilities" 113 * Think locking instructions on spinlocks. 114 * Note, that it is a part of __init region. 115 */ 116 . = ALIGN(8); 117 .altinstructions : { 118 __alt_instructions = .; 119 *(.altinstructions) 120 __alt_instructions_end = .; 121 } 122 123 /* 124 * And here are the replacement instructions. The linker sticks 125 * them as binary blobs. The .altinstructions has enough data to 126 * get the address and the length of them to patch the kernel safely. 127 * Note, that it is a part of __init region. 128 */ 129 .altinstr_replacement : { 130 *(.altinstr_replacement) 131 } 132 133 /* 134 * Table with the patch locations to undo expolines 135 */ 136 . = ALIGN(4); 137 .nospec_call_table : { 138 __nospec_call_start = . ; 139 *(.s390_indirect*) 140 __nospec_call_end = . ; 141 } 142 .nospec_return_table : { 143 __nospec_return_start = . ; 144 *(.s390_return*) 145 __nospec_return_end = . ; 146 } 147 148 BOOT_DATA 149 150 /* 151 * .amode31 section for code, data, ex_table that need to stay 152 * below 2 GB, even when the kernel is relocated above 2 GB. 153 */ 154 . = ALIGN(PAGE_SIZE); 155 _samode31 = .; 156 .amode31.text : { 157 _stext_amode31 = .; 158 *(.amode31.text) 159 *(.amode31.text.*_indirect_*) 160 . = ALIGN(PAGE_SIZE); 161 _etext_amode31 = .; 162 } 163 . = ALIGN(16); 164 .amode31.ex_table : { 165 _start_amode31_ex_table = .; 166 KEEP(*(.amode31.ex_table)) 167 _stop_amode31_ex_table = .; 168 } 169 . = ALIGN(PAGE_SIZE); 170 .amode31.data : { 171 *(.amode31.data) 172 } 173 . = ALIGN(PAGE_SIZE); 174 _eamode31 = .; 175 176 /* early.c uses stsi, which requires page aligned data. */ 177 . = ALIGN(PAGE_SIZE); 178 INIT_DATA_SECTION(0x100) 179 180 PERCPU_SECTION(0x100) 181 182 .dynsym ALIGN(8) : { 183 __dynsym_start = .; 184 *(.dynsym) 185 __dynsym_end = .; 186 } 187 .rela.dyn ALIGN(8) : { 188 __rela_dyn_start = .; 189 *(.rela*) 190 __rela_dyn_end = .; 191 } 192 193 . = ALIGN(PAGE_SIZE); 194 __init_end = .; /* freed after init ends here */ 195 196 BSS_SECTION(PAGE_SIZE, 4 * PAGE_SIZE, PAGE_SIZE) 197 198 . = ALIGN(PAGE_SIZE); 199 _end = . ; 200 201 /* 202 * uncompressed image info used by the decompressor 203 * it should match struct vmlinux_info 204 */ 205 .vmlinux.info 0 (INFO) : { 206 QUAD(_stext) /* default_lma */ 207 QUAD(startup_continue) /* entry */ 208 QUAD(__bss_start - _stext) /* image_size */ 209 QUAD(__bss_stop - __bss_start) /* bss_size */ 210 QUAD(__boot_data_start) /* bootdata_off */ 211 QUAD(__boot_data_end - __boot_data_start) /* bootdata_size */ 212 QUAD(__boot_data_preserved_start) /* bootdata_preserved_off */ 213 QUAD(__boot_data_preserved_end - 214 __boot_data_preserved_start) /* bootdata_preserved_size */ 215 QUAD(__dynsym_start) /* dynsym_start */ 216 QUAD(__rela_dyn_start) /* rela_dyn_start */ 217 QUAD(__rela_dyn_end) /* rela_dyn_end */ 218 QUAD(_eamode31 - _samode31) /* amode31_size */ 219 QUAD(init_mm) 220 QUAD(swapper_pg_dir) 221 QUAD(invalid_pg_dir) 222 } :NONE 223 224 /* Debugging sections. */ 225 STABS_DEBUG 226 DWARF_DEBUG 227 ELF_DETAILS 228 229 /* Sections to be discarded */ 230 DISCARDS 231 /DISCARD/ : { 232 *(.eh_frame) 233 *(.interp) 234 } 235} 236