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 RUNTIME_DISCARD_EXIT 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 *(.text.*_indirect_*) 51 *(.fixup) 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 _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 . = ALIGN(4); 128 .nospec_call_table : { 129 __nospec_call_start = . ; 130 *(.s390_indirect*) 131 __nospec_call_end = . ; 132 } 133 .nospec_return_table : { 134 __nospec_return_start = . ; 135 *(.s390_return*) 136 __nospec_return_end = . ; 137 } 138 139 BOOT_DATA 140 141 /* early.c uses stsi, which requires page aligned data. */ 142 . = ALIGN(PAGE_SIZE); 143 INIT_DATA_SECTION(0x100) 144 145 PERCPU_SECTION(0x100) 146 147 .dynsym ALIGN(8) : { 148 __dynsym_start = .; 149 *(.dynsym) 150 __dynsym_end = .; 151 } 152 .rela.dyn ALIGN(8) : { 153 __rela_dyn_start = .; 154 *(.rela*) 155 __rela_dyn_end = .; 156 } 157 158 . = ALIGN(PAGE_SIZE); 159 __init_end = .; /* freed after init ends here */ 160 161 BSS_SECTION(PAGE_SIZE, 4 * PAGE_SIZE, PAGE_SIZE) 162 163 _end = . ; 164 165 /* 166 * uncompressed image info used by the decompressor 167 * it should match struct vmlinux_info 168 */ 169 .vmlinux.info 0 (INFO) : { 170 QUAD(_stext) /* default_lma */ 171 QUAD(startup_continue) /* entry */ 172 QUAD(__bss_start - _stext) /* image_size */ 173 QUAD(__bss_stop - __bss_start) /* bss_size */ 174 QUAD(__boot_data_start) /* bootdata_off */ 175 QUAD(__boot_data_end - __boot_data_start) /* bootdata_size */ 176 QUAD(__boot_data_preserved_start) /* bootdata_preserved_off */ 177 QUAD(__boot_data_preserved_end - 178 __boot_data_preserved_start) /* bootdata_preserved_size */ 179 QUAD(__dynsym_start) /* dynsym_start */ 180 QUAD(__rela_dyn_start) /* rela_dyn_start */ 181 QUAD(__rela_dyn_end) /* rela_dyn_end */ 182 } :NONE 183 184 /* Debugging sections. */ 185 STABS_DEBUG 186 DWARF_DEBUG 187 ELF_DETAILS 188 189 /* Sections to be discarded */ 190 DISCARDS 191 /DISCARD/ : { 192 *(.eh_frame) 193 *(.interp) 194 } 195} 196