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 9/* 10 * Put .bss..swapper_pg_dir as the first thing in .bss. This will 11 * make sure it has 16k alignment. 12 */ 13#define BSS_FIRST_SECTIONS *(.bss..swapper_pg_dir) 14 15/* Handle ro_after_init data on our own. */ 16#define RO_AFTER_INIT_DATA 17 18#include <asm-generic/vmlinux.lds.h> 19#include <asm/vmlinux.lds.h> 20 21OUTPUT_FORMAT("elf64-s390", "elf64-s390", "elf64-s390") 22OUTPUT_ARCH(s390:64-bit) 23ENTRY(startup_continue) 24jiffies = jiffies_64; 25 26PHDRS { 27 text PT_LOAD FLAGS(5); /* R_E */ 28 data PT_LOAD FLAGS(7); /* RWE */ 29 note PT_NOTE FLAGS(0); /* ___ */ 30} 31 32SECTIONS 33{ 34 . = 0x100000; 35 .text : { 36 _stext = .; /* Start of text section */ 37 _text = .; /* Text and read-only data */ 38 HEAD_TEXT 39 TEXT_TEXT 40 SCHED_TEXT 41 CPUIDLE_TEXT 42 LOCK_TEXT 43 KPROBES_TEXT 44 IRQENTRY_TEXT 45 SOFTIRQENTRY_TEXT 46 *(.text.*_indirect_*) 47 *(.fixup) 48 *(.gnu.warning) 49 . = ALIGN(PAGE_SIZE); 50 _etext = .; /* End of text section */ 51 } :text = 0x0700 52 53 NOTES :text :note 54 55 .dummy : { *(.dummy) } :data 56 57 RO_DATA_SECTION(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 } 68 EXCEPTION_TABLE(16) 69 . = ALIGN(PAGE_SIZE); 70 __end_ro_after_init = .; 71 72 RW_DATA_SECTION(0x100, PAGE_SIZE, THREAD_SIZE) 73 BOOT_DATA_PRESERVED 74 75 _edata = .; /* End of data section */ 76 77 /* will be freed after init */ 78 . = ALIGN(PAGE_SIZE); /* Init code and data */ 79 __init_begin = .; 80 81 . = ALIGN(PAGE_SIZE); 82 .init.text : AT(ADDR(.init.text) - LOAD_OFFSET) { 83 _sinittext = .; 84 INIT_TEXT 85 . = ALIGN(PAGE_SIZE); 86 _einittext = .; 87 } 88 89 /* 90 * .exit.text is discarded at runtime, not link time, 91 * to deal with references from __bug_table 92 */ 93 .exit.text : { 94 EXIT_TEXT 95 } 96 97 .exit.data : { 98 EXIT_DATA 99 } 100 101 /* 102 * struct alt_inst entries. From the header (alternative.h): 103 * "Alternative instructions for different CPU types or capabilities" 104 * Think locking instructions on spinlocks. 105 * Note, that it is a part of __init region. 106 */ 107 . = ALIGN(8); 108 .altinstructions : { 109 __alt_instructions = .; 110 *(.altinstructions) 111 __alt_instructions_end = .; 112 } 113 114 /* 115 * And here are the replacement instructions. The linker sticks 116 * them as binary blobs. The .altinstructions has enough data to 117 * get the address and the length of them to patch the kernel safely. 118 * Note, that it is a part of __init region. 119 */ 120 .altinstr_replacement : { 121 *(.altinstr_replacement) 122 } 123 124 /* 125 * Table with the patch locations to undo expolines 126 */ 127 .nospec_call_table : { 128 __nospec_call_start = . ; 129 *(.s390_indirect*) 130 __nospec_call_end = . ; 131 } 132 .nospec_return_table : { 133 __nospec_return_start = . ; 134 *(.s390_return*) 135 __nospec_return_end = . ; 136 } 137 138 BOOT_DATA 139 140 /* early.c uses stsi, which requires page aligned data. */ 141 . = ALIGN(PAGE_SIZE); 142 INIT_DATA_SECTION(0x100) 143 144 PERCPU_SECTION(0x100) 145 146 .dynsym ALIGN(8) : { 147 __dynsym_start = .; 148 *(.dynsym) 149 __dynsym_end = .; 150 } 151 .rela.dyn ALIGN(8) : { 152 __rela_dyn_start = .; 153 *(.rela*) 154 __rela_dyn_end = .; 155 } 156 157 . = ALIGN(PAGE_SIZE); 158 __init_end = .; /* freed after init ends here */ 159 160 BSS_SECTION(PAGE_SIZE, 4 * PAGE_SIZE, PAGE_SIZE) 161 162 _end = . ; 163 164 /* 165 * uncompressed image info used by the decompressor 166 * it should match struct vmlinux_info 167 */ 168 .vmlinux.info 0 (INFO) : { 169 QUAD(_stext) /* default_lma */ 170 QUAD(startup_continue) /* entry */ 171 QUAD(__bss_start - _stext) /* image_size */ 172 QUAD(__bss_stop - __bss_start) /* bss_size */ 173 QUAD(__boot_data_start) /* bootdata_off */ 174 QUAD(__boot_data_end - __boot_data_start) /* bootdata_size */ 175 QUAD(__boot_data_preserved_start) /* bootdata_preserved_off */ 176 QUAD(__boot_data_preserved_end - 177 __boot_data_preserved_start) /* bootdata_preserved_size */ 178 QUAD(__dynsym_start) /* dynsym_start */ 179 QUAD(__rela_dyn_start) /* rela_dyn_start */ 180 QUAD(__rela_dyn_end) /* rela_dyn_end */ 181 } :NONE 182 183 /* Debugging sections. */ 184 STABS_DEBUG 185 DWARF_DEBUG 186 187 /* Sections to be discarded */ 188 DISCARDS 189 /DISCARD/ : { 190 *(.eh_frame) 191 } 192} 193