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 76 _edata = .; /* End of data section */ 77 78 /* will be freed after init */ 79 . = ALIGN(PAGE_SIZE); /* Init code and data */ 80 __init_begin = .; 81 82 . = ALIGN(PAGE_SIZE); 83 .init.text : AT(ADDR(.init.text) - LOAD_OFFSET) { 84 _sinittext = .; 85 INIT_TEXT 86 . = ALIGN(PAGE_SIZE); 87 _einittext = .; 88 } 89 90 /* 91 * .exit.text is discarded at runtime, not link time, 92 * to deal with references from __bug_table 93 */ 94 .exit.text : { 95 EXIT_TEXT 96 } 97 98 .exit.data : { 99 EXIT_DATA 100 } 101 102 /* 103 * struct alt_inst entries. From the header (alternative.h): 104 * "Alternative instructions for different CPU types or capabilities" 105 * Think locking instructions on spinlocks. 106 * Note, that it is a part of __init region. 107 */ 108 . = ALIGN(8); 109 .altinstructions : { 110 __alt_instructions = .; 111 *(.altinstructions) 112 __alt_instructions_end = .; 113 } 114 115 /* 116 * And here are the replacement instructions. The linker sticks 117 * them as binary blobs. The .altinstructions has enough data to 118 * get the address and the length of them to patch the kernel safely. 119 * Note, that it is a part of __init region. 120 */ 121 .altinstr_replacement : { 122 *(.altinstr_replacement) 123 } 124 125 /* 126 * Table with the patch locations to undo expolines 127 */ 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 . = ALIGN(PAGE_SIZE); 147 __init_end = .; /* freed after init ends here */ 148 149 BSS_SECTION(PAGE_SIZE, 4 * PAGE_SIZE, PAGE_SIZE) 150 151 _end = . ; 152 153 /* 154 * uncompressed image info used by the decompressor 155 * it should match struct vmlinux_info 156 */ 157 .vmlinux.info 0 (INFO) : { 158 QUAD(_stext) /* default_lma */ 159 QUAD(startup_continue) /* entry */ 160 QUAD(__bss_start - _stext) /* image_size */ 161 QUAD(__bss_stop - __bss_start) /* bss_size */ 162 QUAD(__boot_data_start) /* bootdata_off */ 163 QUAD(__boot_data_end - __boot_data_start) /* bootdata_size */ 164 } :NONE 165 166 /* Debugging sections. */ 167 STABS_DEBUG 168 DWARF_DEBUG 169 170 /* Sections to be discarded */ 171 DISCARDS 172 /DISCARD/ : { 173 *(.eh_frame) 174 } 175} 176