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 _stext = .; /* Start of text section */ 36 .text : { 37 /* Text and read-only data */ 38 _text = .; 39 HEAD_TEXT 40 TEXT_TEXT 41 SCHED_TEXT 42 CPUIDLE_TEXT 43 LOCK_TEXT 44 KPROBES_TEXT 45 IRQENTRY_TEXT 46 SOFTIRQENTRY_TEXT 47 *(.text.*_indirect_*) 48 *(.fixup) 49 *(.gnu.warning) 50 } :text = 0x0700 51 52 . = ALIGN(PAGE_SIZE); 53 _etext = .; /* End of text section */ 54 55 NOTES :text :note 56 57 .dummy : { *(.dummy) } :data 58 59 RO_DATA_SECTION(PAGE_SIZE) 60 61 . = ALIGN(PAGE_SIZE); 62 _sdata = .; /* Start of data section */ 63 64 . = ALIGN(PAGE_SIZE); 65 __start_ro_after_init = .; 66 .data..ro_after_init : { 67 *(.data..ro_after_init) 68 JUMP_TABLE_DATA 69 } 70 EXCEPTION_TABLE(16) 71 . = ALIGN(PAGE_SIZE); 72 __end_ro_after_init = .; 73 74 RW_DATA_SECTION(0x100, PAGE_SIZE, THREAD_SIZE) 75 BOOT_DATA_PRESERVED 76 77 _edata = .; /* End of data section */ 78 79 /* will be freed after init */ 80 . = ALIGN(PAGE_SIZE); /* Init code and data */ 81 __init_begin = .; 82 83 . = ALIGN(PAGE_SIZE); 84 .init.text : AT(ADDR(.init.text) - LOAD_OFFSET) { 85 _sinittext = .; 86 INIT_TEXT 87 . = ALIGN(PAGE_SIZE); 88 _einittext = .; 89 } 90 91 /* 92 * .exit.text is discarded at runtime, not link time, 93 * to deal with references from __bug_table 94 */ 95 .exit.text : { 96 EXIT_TEXT 97 } 98 99 .exit.data : { 100 EXIT_DATA 101 } 102 103 /* 104 * struct alt_inst entries. From the header (alternative.h): 105 * "Alternative instructions for different CPU types or capabilities" 106 * Think locking instructions on spinlocks. 107 * Note, that it is a part of __init region. 108 */ 109 . = ALIGN(8); 110 .altinstructions : { 111 __alt_instructions = .; 112 *(.altinstructions) 113 __alt_instructions_end = .; 114 } 115 116 /* 117 * And here are the replacement instructions. The linker sticks 118 * them as binary blobs. The .altinstructions has enough data to 119 * get the address and the length of them to patch the kernel safely. 120 * Note, that it is a part of __init region. 121 */ 122 .altinstr_replacement : { 123 *(.altinstr_replacement) 124 } 125 126 /* 127 * Table with the patch locations to undo expolines 128 */ 129 .nospec_call_table : { 130 __nospec_call_start = . ; 131 *(.s390_indirect*) 132 __nospec_call_end = . ; 133 } 134 .nospec_return_table : { 135 __nospec_return_start = . ; 136 *(.s390_return*) 137 __nospec_return_end = . ; 138 } 139 140 BOOT_DATA 141 142 /* early.c uses stsi, which requires page aligned data. */ 143 . = ALIGN(PAGE_SIZE); 144 INIT_DATA_SECTION(0x100) 145 146 PERCPU_SECTION(0x100) 147 148 .dynsym ALIGN(8) : { 149 __dynsym_start = .; 150 *(.dynsym) 151 __dynsym_end = .; 152 } 153 .rela.dyn ALIGN(8) : { 154 __rela_dyn_start = .; 155 *(.rela*) 156 __rela_dyn_end = .; 157 } 158 159 . = ALIGN(PAGE_SIZE); 160 __init_end = .; /* freed after init ends here */ 161 162 BSS_SECTION(PAGE_SIZE, 4 * PAGE_SIZE, PAGE_SIZE) 163 164 _end = . ; 165 166 /* 167 * uncompressed image info used by the decompressor 168 * it should match struct vmlinux_info 169 */ 170 .vmlinux.info 0 (INFO) : { 171 QUAD(_stext) /* default_lma */ 172 QUAD(startup_continue) /* entry */ 173 QUAD(__bss_start - _stext) /* image_size */ 174 QUAD(__bss_stop - __bss_start) /* bss_size */ 175 QUAD(__boot_data_start) /* bootdata_off */ 176 QUAD(__boot_data_end - __boot_data_start) /* bootdata_size */ 177 QUAD(__boot_data_preserved_start) /* bootdata_preserved_off */ 178 QUAD(__boot_data_preserved_end - 179 __boot_data_preserved_start) /* bootdata_preserved_size */ 180 QUAD(__dynsym_start) /* dynsym_start */ 181 QUAD(__rela_dyn_start) /* rela_dyn_start */ 182 QUAD(__rela_dyn_end) /* rela_dyn_end */ 183 } :NONE 184 185 /* Debugging sections. */ 186 STABS_DEBUG 187 DWARF_DEBUG 188 189 /* Sections to be discarded */ 190 DISCARDS 191 /DISCARD/ : { 192 *(.eh_frame) 193 } 194} 195