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 20OUTPUT_FORMAT("elf64-s390", "elf64-s390", "elf64-s390") 21OUTPUT_ARCH(s390:64-bit) 22ENTRY(startup_continue) 23jiffies = jiffies_64; 24 25PHDRS { 26 text PT_LOAD FLAGS(5); /* R_E */ 27 data PT_LOAD FLAGS(7); /* RWE */ 28 note PT_NOTE FLAGS(0); /* ___ */ 29} 30 31SECTIONS 32{ 33 . = 0x100000; 34 _stext = .; /* Start of text section */ 35 .text : { 36 /* Text and read-only data */ 37 _text = .; 38 HEAD_TEXT 39 TEXT_TEXT 40 SCHED_TEXT 41 CPUIDLE_TEXT 42 LOCK_TEXT 43 KPROBES_TEXT 44 IRQENTRY_TEXT 45 SOFTIRQENTRY_TEXT 46 *(.text.*_indirect_*) 47 *(.fixup) 48 *(.gnu.warning) 49 } :text = 0x0700 50 51 . = ALIGN(PAGE_SIZE); 52 _etext = .; /* End of text section */ 53 54 NOTES :text :note 55 56 .dummy : { *(.dummy) } :data 57 58 RO_DATA_SECTION(PAGE_SIZE) 59 60 . = ALIGN(PAGE_SIZE); 61 _sdata = .; /* Start of data section */ 62 63 . = ALIGN(PAGE_SIZE); 64 __start_ro_after_init = .; 65 .data..ro_after_init : { 66 *(.data..ro_after_init) 67 } 68 EXCEPTION_TABLE(16) 69 . = ALIGN(PAGE_SIZE); 70 __end_ro_after_init = .; 71 72 RW_DATA_SECTION(0x100, PAGE_SIZE, THREAD_SIZE) 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 /* early.c uses stsi, which requires page aligned data. */ 138 . = ALIGN(PAGE_SIZE); 139 INIT_DATA_SECTION(0x100) 140 141 PERCPU_SECTION(0x100) 142 . = ALIGN(PAGE_SIZE); 143 __init_end = .; /* freed after init ends here */ 144 145 BSS_SECTION(PAGE_SIZE, 4 * PAGE_SIZE, PAGE_SIZE) 146 147 _end = . ; 148 149 /* Debugging sections. */ 150 STABS_DEBUG 151 DWARF_DEBUG 152 153 /* Sections to be discarded */ 154 DISCARDS 155 /DISCARD/ : { 156 *(.eh_frame) 157 } 158} 159