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 *(.bss..invalid_pg_dir) 15 16/* Handle ro_after_init data on our own. */ 17#define RO_AFTER_INIT_DATA 18 19#define EMITS_PT_NOTE 20 21#include <asm-generic/vmlinux.lds.h> 22#include <asm/vmlinux.lds.h> 23 24OUTPUT_FORMAT("elf64-s390", "elf64-s390", "elf64-s390") 25OUTPUT_ARCH(s390:64-bit) 26ENTRY(startup_continue) 27jiffies = jiffies_64; 28 29PHDRS { 30 text PT_LOAD FLAGS(5); /* R_E */ 31 data PT_LOAD FLAGS(7); /* RWE */ 32 note PT_NOTE FLAGS(0); /* ___ */ 33} 34 35SECTIONS 36{ 37 . = 0x100000; 38 .text : { 39 _stext = .; /* Start of text section */ 40 _text = .; /* Text and read-only data */ 41 HEAD_TEXT 42 TEXT_TEXT 43 SCHED_TEXT 44 CPUIDLE_TEXT 45 LOCK_TEXT 46 KPROBES_TEXT 47 IRQENTRY_TEXT 48 SOFTIRQENTRY_TEXT 49 *(.text.*_indirect_*) 50 *(.fixup) 51 *(.gnu.warning) 52 . = ALIGN(PAGE_SIZE); 53 _etext = .; /* End of text section */ 54 } :text = 0x0700 55 56 RO_DATA(PAGE_SIZE) 57 58 . = ALIGN(PAGE_SIZE); 59 _sdata = .; /* Start of data section */ 60 61 . = ALIGN(PAGE_SIZE); 62 __start_ro_after_init = .; 63 .data..ro_after_init : { 64 *(.data..ro_after_init) 65 JUMP_TABLE_DATA 66 } :data 67 EXCEPTION_TABLE(16) 68 . = ALIGN(PAGE_SIZE); 69 __end_ro_after_init = .; 70 71 RW_DATA(0x100, PAGE_SIZE, THREAD_SIZE) 72 BOOT_DATA_PRESERVED 73 74 _edata = .; /* End of data section */ 75 76 /* will be freed after init */ 77 . = ALIGN(PAGE_SIZE); /* Init code and data */ 78 __init_begin = .; 79 80 . = ALIGN(PAGE_SIZE); 81 .init.text : AT(ADDR(.init.text) - LOAD_OFFSET) { 82 _sinittext = .; 83 INIT_TEXT 84 . = ALIGN(PAGE_SIZE); 85 _einittext = .; 86 } 87 88 /* 89 * .exit.text is discarded at runtime, not link time, 90 * to deal with references from __bug_table 91 */ 92 .exit.text : { 93 EXIT_TEXT 94 } 95 96 .exit.data : { 97 EXIT_DATA 98 } 99 100 /* 101 * struct alt_inst entries. From the header (alternative.h): 102 * "Alternative instructions for different CPU types or capabilities" 103 * Think locking instructions on spinlocks. 104 * Note, that it is a part of __init region. 105 */ 106 . = ALIGN(8); 107 .altinstructions : { 108 __alt_instructions = .; 109 *(.altinstructions) 110 __alt_instructions_end = .; 111 } 112 113 /* 114 * And here are the replacement instructions. The linker sticks 115 * them as binary blobs. The .altinstructions has enough data to 116 * get the address and the length of them to patch the kernel safely. 117 * Note, that it is a part of __init region. 118 */ 119 .altinstr_replacement : { 120 *(.altinstr_replacement) 121 } 122 123 /* 124 * Table with the patch locations to undo expolines 125 */ 126 .nospec_call_table : { 127 __nospec_call_start = . ; 128 *(.s390_indirect*) 129 __nospec_call_end = . ; 130 } 131 .nospec_return_table : { 132 __nospec_return_start = . ; 133 *(.s390_return*) 134 __nospec_return_end = . ; 135 } 136 137 BOOT_DATA 138 139 /* early.c uses stsi, which requires page aligned data. */ 140 . = ALIGN(PAGE_SIZE); 141 INIT_DATA_SECTION(0x100) 142 143 PERCPU_SECTION(0x100) 144 145 .dynsym ALIGN(8) : { 146 __dynsym_start = .; 147 *(.dynsym) 148 __dynsym_end = .; 149 } 150 .rela.dyn ALIGN(8) : { 151 __rela_dyn_start = .; 152 *(.rela*) 153 __rela_dyn_end = .; 154 } 155 156 . = ALIGN(PAGE_SIZE); 157 __init_end = .; /* freed after init ends here */ 158 159 BSS_SECTION(PAGE_SIZE, 4 * PAGE_SIZE, PAGE_SIZE) 160 161 _end = . ; 162 163 /* 164 * uncompressed image info used by the decompressor 165 * it should match struct vmlinux_info 166 */ 167 .vmlinux.info 0 (INFO) : { 168 QUAD(_stext) /* default_lma */ 169 QUAD(startup_continue) /* entry */ 170 QUAD(__bss_start - _stext) /* image_size */ 171 QUAD(__bss_stop - __bss_start) /* bss_size */ 172 QUAD(__boot_data_start) /* bootdata_off */ 173 QUAD(__boot_data_end - __boot_data_start) /* bootdata_size */ 174 QUAD(__boot_data_preserved_start) /* bootdata_preserved_off */ 175 QUAD(__boot_data_preserved_end - 176 __boot_data_preserved_start) /* bootdata_preserved_size */ 177 QUAD(__dynsym_start) /* dynsym_start */ 178 QUAD(__rela_dyn_start) /* rela_dyn_start */ 179 QUAD(__rela_dyn_end) /* rela_dyn_end */ 180 } :NONE 181 182 /* Debugging sections. */ 183 STABS_DEBUG 184 DWARF_DEBUG 185 ELF_DETAILS 186 187 /* Sections to be discarded */ 188 DISCARDS 189 /DISCARD/ : { 190 *(.eh_frame) 191 } 192} 193