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