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