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#define RO_EXCEPTION_TABLE_ALIGN 16 18 19/* Handle ro_after_init data on our own. */ 20#define RO_AFTER_INIT_DATA 21 22#define RUNTIME_DISCARD_EXIT 23 24#define EMITS_PT_NOTE 25 26#include <asm-generic/vmlinux.lds.h> 27#include <asm/vmlinux.lds.h> 28 29OUTPUT_FORMAT("elf64-s390", "elf64-s390", "elf64-s390") 30OUTPUT_ARCH(s390:64-bit) 31ENTRY(startup_continue) 32jiffies = jiffies_64; 33 34PHDRS { 35 text PT_LOAD FLAGS(5); /* R_E */ 36 data PT_LOAD FLAGS(7); /* RWE */ 37 note PT_NOTE FLAGS(0); /* ___ */ 38} 39 40SECTIONS 41{ 42 . = 0x100000; 43 .text : { 44 _stext = .; /* Start of text section */ 45 _text = .; /* Text and read-only data */ 46 HEAD_TEXT 47 TEXT_TEXT 48 SCHED_TEXT 49 LOCK_TEXT 50 KPROBES_TEXT 51 IRQENTRY_TEXT 52 SOFTIRQENTRY_TEXT 53 FTRACE_HOTPATCH_TRAMPOLINES_TEXT 54 *(.text.*_indirect_*) 55 *(.gnu.warning) 56 . = ALIGN(PAGE_SIZE); 57 _etext = .; /* End of text section */ 58 } :text = 0x0700 59 60 RO_DATA(PAGE_SIZE) 61 62 . = ALIGN(PAGE_SIZE); 63 _sdata = .; /* Start of data section */ 64 65 . = ALIGN(PAGE_SIZE); 66 __start_ro_after_init = .; 67 .data..ro_after_init : { 68 *(.data..ro_after_init) 69 JUMP_TABLE_DATA 70 } :data 71 . = ALIGN(PAGE_SIZE); 72 __end_ro_after_init = .; 73 74 .data.rel.ro : { 75 *(.data.rel.ro .data.rel.ro.*) 76 } 77 .got : { 78 __got_start = .; 79 *(.got) 80 __got_end = .; 81 } 82 83 RW_DATA(0x100, PAGE_SIZE, THREAD_SIZE) 84 BOOT_DATA_PRESERVED 85 86 . = ALIGN(8); 87 .amode31.refs : { 88 _start_amode31_refs = .; 89 *(.amode31.refs) 90 _end_amode31_refs = .; 91 } 92 93 . = ALIGN(PAGE_SIZE); 94 _edata = .; /* End of data section */ 95 96 /* will be freed after init */ 97 . = ALIGN(PAGE_SIZE); /* Init code and data */ 98 __init_begin = .; 99 100 . = ALIGN(PAGE_SIZE); 101 .init.text : AT(ADDR(.init.text) - LOAD_OFFSET) { 102 _sinittext = .; 103 INIT_TEXT 104 . = ALIGN(PAGE_SIZE); 105 _einittext = .; 106 } 107 108 /* 109 * .exit.text is discarded at runtime, not link time, 110 * to deal with references from __bug_table 111 */ 112 .exit.text : { 113 EXIT_TEXT 114 } 115 116 .exit.data : { 117 EXIT_DATA 118 } 119 120 /* 121 * struct alt_inst entries. From the header (alternative.h): 122 * "Alternative instructions for different CPU types or capabilities" 123 * Think locking instructions on spinlocks. 124 * Note, that it is a part of __init region. 125 */ 126 . = ALIGN(8); 127 .altinstructions : { 128 __alt_instructions = .; 129 *(.altinstructions) 130 __alt_instructions_end = .; 131 } 132 133 /* 134 * And here are the replacement instructions. The linker sticks 135 * them as binary blobs. The .altinstructions has enough data to 136 * get the address and the length of them to patch the kernel safely. 137 * Note, that it is a part of __init region. 138 */ 139 .altinstr_replacement : { 140 *(.altinstr_replacement) 141 } 142 143 /* 144 * Table with the patch locations to undo expolines 145 */ 146 . = ALIGN(4); 147 .nospec_call_table : { 148 __nospec_call_start = . ; 149 *(.s390_indirect*) 150 __nospec_call_end = . ; 151 } 152 .nospec_return_table : { 153 __nospec_return_start = . ; 154 *(.s390_return*) 155 __nospec_return_end = . ; 156 } 157 158 BOOT_DATA 159 160 /* 161 * .amode31 section for code, data, ex_table that need to stay 162 * below 2 GB, even when the kernel is relocated above 2 GB. 163 */ 164 . = ALIGN(PAGE_SIZE); 165 _samode31 = .; 166 .amode31.text : { 167 _stext_amode31 = .; 168 *(.amode31.text) 169 *(.amode31.text.*_indirect_*) 170 . = ALIGN(PAGE_SIZE); 171 _etext_amode31 = .; 172 } 173 . = ALIGN(16); 174 .amode31.ex_table : { 175 _start_amode31_ex_table = .; 176 KEEP(*(.amode31.ex_table)) 177 _stop_amode31_ex_table = .; 178 } 179 . = ALIGN(PAGE_SIZE); 180 .amode31.data : { 181 *(.amode31.data) 182 } 183 . = ALIGN(PAGE_SIZE); 184 _eamode31 = .; 185 186 /* early.c uses stsi, which requires page aligned data. */ 187 . = ALIGN(PAGE_SIZE); 188 INIT_DATA_SECTION(0x100) 189 190 PERCPU_SECTION(0x100) 191 192 .dynsym ALIGN(8) : { 193 __dynsym_start = .; 194 *(.dynsym) 195 __dynsym_end = .; 196 } 197 .rela.dyn ALIGN(8) : { 198 __rela_dyn_start = .; 199 *(.rela*) 200 __rela_dyn_end = .; 201 } 202 203 . = ALIGN(PAGE_SIZE); 204 __init_end = .; /* freed after init ends here */ 205 206 BSS_SECTION(PAGE_SIZE, 4 * PAGE_SIZE, PAGE_SIZE) 207 208 . = ALIGN(PAGE_SIZE); 209 _end = . ; 210 211 /* 212 * uncompressed image info used by the decompressor 213 * it should match struct vmlinux_info 214 */ 215 .vmlinux.info 0 (INFO) : { 216 QUAD(_stext) /* default_lma */ 217 QUAD(startup_continue) /* entry */ 218 QUAD(__bss_start - _stext) /* image_size */ 219 QUAD(__bss_stop - __bss_start) /* bss_size */ 220 QUAD(__boot_data_start) /* bootdata_off */ 221 QUAD(__boot_data_end - __boot_data_start) /* bootdata_size */ 222 QUAD(__boot_data_preserved_start) /* bootdata_preserved_off */ 223 QUAD(__boot_data_preserved_end - 224 __boot_data_preserved_start) /* bootdata_preserved_size */ 225 QUAD(__dynsym_start) /* dynsym_start */ 226 QUAD(__rela_dyn_start) /* rela_dyn_start */ 227 QUAD(__rela_dyn_end) /* rela_dyn_end */ 228 QUAD(_eamode31 - _samode31) /* amode31_size */ 229 QUAD(init_mm) 230 QUAD(swapper_pg_dir) 231 QUAD(invalid_pg_dir) 232#ifdef CONFIG_KASAN 233 QUAD(kasan_early_shadow_page) 234 QUAD(kasan_early_shadow_pte) 235 QUAD(kasan_early_shadow_pmd) 236 QUAD(kasan_early_shadow_pud) 237 QUAD(kasan_early_shadow_p4d) 238#endif 239 } :NONE 240 241 /* Debugging sections. */ 242 STABS_DEBUG 243 DWARF_DEBUG 244 ELF_DETAILS 245 246 /* Sections to be discarded */ 247 DISCARDS 248 /DISCARD/ : { 249 *(.eh_frame) 250 *(.interp) 251 } 252} 253