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#define EMITS_PT_NOTE 19 20#include <asm-generic/vmlinux.lds.h> 21#include <asm/vmlinux.lds.h> 22 23OUTPUT_FORMAT("elf64-s390", "elf64-s390", "elf64-s390") 24OUTPUT_ARCH(s390:64-bit) 25ENTRY(startup_continue) 26jiffies = jiffies_64; 27 28PHDRS { 29 text PT_LOAD FLAGS(5); /* R_E */ 30 data PT_LOAD FLAGS(7); /* RWE */ 31 note PT_NOTE FLAGS(0); /* ___ */ 32} 33 34SECTIONS 35{ 36 . = 0x100000; 37 .text : { 38 _stext = .; /* Start of text section */ 39 _text = .; /* Text and read-only data */ 40 HEAD_TEXT 41 TEXT_TEXT 42 SCHED_TEXT 43 CPUIDLE_TEXT 44 LOCK_TEXT 45 KPROBES_TEXT 46 IRQENTRY_TEXT 47 SOFTIRQENTRY_TEXT 48 *(.text.*_indirect_*) 49 *(.fixup) 50 *(.gnu.warning) 51 . = ALIGN(PAGE_SIZE); 52 _etext = .; /* End of text section */ 53 } :text = 0x0700 54 55 RO_DATA(PAGE_SIZE) 56 57 . = ALIGN(PAGE_SIZE); 58 _sdata = .; /* Start of data section */ 59 60 . = ALIGN(PAGE_SIZE); 61 __start_ro_after_init = .; 62 .data..ro_after_init : { 63 *(.data..ro_after_init) 64 JUMP_TABLE_DATA 65 } :data 66 EXCEPTION_TABLE(16) 67 . = ALIGN(PAGE_SIZE); 68 __end_ro_after_init = .; 69 70 RW_DATA(0x100, PAGE_SIZE, THREAD_SIZE) 71 BOOT_DATA_PRESERVED 72 73 _edata = .; /* End of data section */ 74 75 /* will be freed after init */ 76 . = ALIGN(PAGE_SIZE); /* Init code and data */ 77 __init_begin = .; 78 79 . = ALIGN(PAGE_SIZE); 80 .init.text : AT(ADDR(.init.text) - LOAD_OFFSET) { 81 _sinittext = .; 82 INIT_TEXT 83 . = ALIGN(PAGE_SIZE); 84 _einittext = .; 85 } 86 87 /* 88 * .exit.text is discarded at runtime, not link time, 89 * to deal with references from __bug_table 90 */ 91 .exit.text : { 92 EXIT_TEXT 93 } 94 95 .exit.data : { 96 EXIT_DATA 97 } 98 99 /* 100 * struct alt_inst entries. From the header (alternative.h): 101 * "Alternative instructions for different CPU types or capabilities" 102 * Think locking instructions on spinlocks. 103 * Note, that it is a part of __init region. 104 */ 105 . = ALIGN(8); 106 .altinstructions : { 107 __alt_instructions = .; 108 *(.altinstructions) 109 __alt_instructions_end = .; 110 } 111 112 /* 113 * And here are the replacement instructions. The linker sticks 114 * them as binary blobs. The .altinstructions has enough data to 115 * get the address and the length of them to patch the kernel safely. 116 * Note, that it is a part of __init region. 117 */ 118 .altinstr_replacement : { 119 *(.altinstr_replacement) 120 } 121 122 /* 123 * Table with the patch locations to undo expolines 124 */ 125 .nospec_call_table : { 126 __nospec_call_start = . ; 127 *(.s390_indirect*) 128 __nospec_call_end = . ; 129 } 130 .nospec_return_table : { 131 __nospec_return_start = . ; 132 *(.s390_return*) 133 __nospec_return_end = . ; 134 } 135 136 BOOT_DATA 137 138 /* early.c uses stsi, which requires page aligned data. */ 139 . = ALIGN(PAGE_SIZE); 140 INIT_DATA_SECTION(0x100) 141 142 PERCPU_SECTION(0x100) 143 144 .dynsym ALIGN(8) : { 145 __dynsym_start = .; 146 *(.dynsym) 147 __dynsym_end = .; 148 } 149 .rela.dyn ALIGN(8) : { 150 __rela_dyn_start = .; 151 *(.rela*) 152 __rela_dyn_end = .; 153 } 154 155 . = ALIGN(PAGE_SIZE); 156 __init_end = .; /* freed after init ends here */ 157 158 BSS_SECTION(PAGE_SIZE, 4 * PAGE_SIZE, PAGE_SIZE) 159 160 _end = . ; 161 162 /* 163 * uncompressed image info used by the decompressor 164 * it should match struct vmlinux_info 165 */ 166 .vmlinux.info 0 (INFO) : { 167 QUAD(_stext) /* default_lma */ 168 QUAD(startup_continue) /* entry */ 169 QUAD(__bss_start - _stext) /* image_size */ 170 QUAD(__bss_stop - __bss_start) /* bss_size */ 171 QUAD(__boot_data_start) /* bootdata_off */ 172 QUAD(__boot_data_end - __boot_data_start) /* bootdata_size */ 173 QUAD(__boot_data_preserved_start) /* bootdata_preserved_off */ 174 QUAD(__boot_data_preserved_end - 175 __boot_data_preserved_start) /* bootdata_preserved_size */ 176 QUAD(__dynsym_start) /* dynsym_start */ 177 QUAD(__rela_dyn_start) /* rela_dyn_start */ 178 QUAD(__rela_dyn_end) /* rela_dyn_end */ 179 } :NONE 180 181 /* Debugging sections. */ 182 STABS_DEBUG 183 DWARF_DEBUG 184 185 /* Sections to be discarded */ 186 DISCARDS 187 /DISCARD/ : { 188 *(.eh_frame) 189 } 190} 191