1/* SPDX-License-Identifier: GPL-2.0 */ 2/* ld script to make ARM Linux kernel 3 * taken from the i386 version by Russell King 4 * Written by Martin Mares <mj@atrey.karlin.mff.cuni.cz> 5 */ 6 7#ifdef CONFIG_XIP_KERNEL 8#include "vmlinux-xip.lds.S" 9#else 10 11#include <asm-generic/vmlinux.lds.h> 12#include <asm/cache.h> 13#include <asm/thread_info.h> 14#include <asm/memory.h> 15#include <asm/mpu.h> 16#include <asm/page.h> 17#include <asm/pgtable.h> 18 19#include "vmlinux.lds.h" 20 21OUTPUT_ARCH(arm) 22ENTRY(stext) 23 24#ifndef __ARMEB__ 25jiffies = jiffies_64; 26#else 27jiffies = jiffies_64 + 4; 28#endif 29 30SECTIONS 31{ 32 /* 33 * XXX: The linker does not define how output sections are 34 * assigned to input sections when there are multiple statements 35 * matching the same input section name. There is no documented 36 * order of matching. 37 * 38 * unwind exit sections must be discarded before the rest of the 39 * unwind sections get included. 40 */ 41 /DISCARD/ : { 42 ARM_DISCARD 43#ifndef CONFIG_SMP_ON_UP 44 *(.alt.smp.init) 45#endif 46 } 47 48 . = PAGE_OFFSET + TEXT_OFFSET; 49 .head.text : { 50 _text = .; 51 HEAD_TEXT 52 } 53 54#ifdef CONFIG_STRICT_KERNEL_RWX 55 . = ALIGN(1<<SECTION_SHIFT); 56#endif 57 58#ifdef CONFIG_ARM_MPU 59 . = ALIGN(PMSAv8_MINALIGN); 60#endif 61 .text : { /* Real text segment */ 62 _stext = .; /* Text and read-only data */ 63 ARM_TEXT 64 } 65 66#ifdef CONFIG_DEBUG_ALIGN_RODATA 67 . = ALIGN(1<<SECTION_SHIFT); 68#endif 69 _etext = .; /* End of text section */ 70 71 RO_DATA(PAGE_SIZE) 72 73 . = ALIGN(4); 74 __ex_table : AT(ADDR(__ex_table) - LOAD_OFFSET) { 75 __start___ex_table = .; 76 ARM_MMU_KEEP(*(__ex_table)) 77 __stop___ex_table = .; 78 } 79 80#ifdef CONFIG_ARM_UNWIND 81 ARM_UNWIND_SECTIONS 82#endif 83 84 NOTES 85 86#ifdef CONFIG_STRICT_KERNEL_RWX 87 . = ALIGN(1<<SECTION_SHIFT); 88#else 89 . = ALIGN(PAGE_SIZE); 90#endif 91 __init_begin = .; 92 93 ARM_VECTORS 94 INIT_TEXT_SECTION(8) 95 .exit.text : { 96 ARM_EXIT_KEEP(EXIT_TEXT) 97 } 98 .init.proc.info : { 99 ARM_CPU_DISCARD(PROC_INFO) 100 } 101 .init.arch.info : { 102 __arch_info_begin = .; 103 *(.arch.info.init) 104 __arch_info_end = .; 105 } 106 .init.tagtable : { 107 __tagtable_begin = .; 108 *(.taglist.init) 109 __tagtable_end = .; 110 } 111#ifdef CONFIG_SMP_ON_UP 112 .init.smpalt : { 113 __smpalt_begin = .; 114 *(.alt.smp.init) 115 __smpalt_end = .; 116 } 117#endif 118 .init.pv_table : { 119 __pv_table_begin = .; 120 *(.pv_table) 121 __pv_table_end = .; 122 } 123 124 INIT_DATA_SECTION(16) 125 126 .exit.data : { 127 ARM_EXIT_KEEP(EXIT_DATA) 128 } 129 130#ifdef CONFIG_SMP 131 PERCPU_SECTION(L1_CACHE_BYTES) 132#endif 133 134#ifdef CONFIG_HAVE_TCM 135 ARM_TCM 136#endif 137 138#ifdef CONFIG_STRICT_KERNEL_RWX 139 . = ALIGN(1<<SECTION_SHIFT); 140#else 141 . = ALIGN(THREAD_SIZE); 142#endif 143 __init_end = .; 144 145 _sdata = .; 146 RW_DATA_SECTION(L1_CACHE_BYTES, PAGE_SIZE, THREAD_SIZE) 147 _edata = .; 148 149 BSS_SECTION(0, 0, 0) 150#ifdef CONFIG_ARM_MPU 151 . = ALIGN(PMSAv8_MINALIGN); 152#endif 153 _end = .; 154 155 STABS_DEBUG 156} 157 158#ifdef CONFIG_STRICT_KERNEL_RWX 159/* 160 * Without CONFIG_DEBUG_ALIGN_RODATA, __start_rodata_section_aligned will 161 * be the first section-aligned location after __start_rodata. Otherwise, 162 * it will be equal to __start_rodata. 163 */ 164__start_rodata_section_aligned = ALIGN(__start_rodata, 1 << SECTION_SHIFT); 165#endif 166 167/* 168 * These must never be empty 169 * If you have to comment these two assert statements out, your 170 * binutils is too old (for other reasons as well) 171 */ 172ASSERT((__proc_info_end - __proc_info_begin), "missing CPU support") 173ASSERT((__arch_info_end - __arch_info_begin), "no machine record defined") 174 175/* 176 * The HYP init code can't be more than a page long, 177 * and should not cross a page boundary. 178 * The above comment applies as well. 179 */ 180ASSERT(__hyp_idmap_text_end - (__hyp_idmap_text_start & PAGE_MASK) <= PAGE_SIZE, 181 "HYP init code too big or misaligned") 182 183#endif /* CONFIG_XIP_KERNEL */ 184