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#ifdef CONFIG_STRICT_KERNEL_RWX 85 . = ALIGN(1<<SECTION_SHIFT); 86#else 87 . = ALIGN(PAGE_SIZE); 88#endif 89 __init_begin = .; 90 91 ARM_VECTORS 92 INIT_TEXT_SECTION(8) 93 .exit.text : { 94 ARM_EXIT_KEEP(EXIT_TEXT) 95 } 96 .init.proc.info : { 97 ARM_CPU_DISCARD(PROC_INFO) 98 } 99 .init.arch.info : { 100 __arch_info_begin = .; 101 *(.arch.info.init) 102 __arch_info_end = .; 103 } 104 .init.tagtable : { 105 __tagtable_begin = .; 106 *(.taglist.init) 107 __tagtable_end = .; 108 } 109#ifdef CONFIG_SMP_ON_UP 110 .init.smpalt : { 111 __smpalt_begin = .; 112 *(.alt.smp.init) 113 __smpalt_end = .; 114 } 115#endif 116 .init.pv_table : { 117 __pv_table_begin = .; 118 *(.pv_table) 119 __pv_table_end = .; 120 } 121 122 INIT_DATA_SECTION(16) 123 124 .exit.data : { 125 ARM_EXIT_KEEP(EXIT_DATA) 126 } 127 128#ifdef CONFIG_SMP 129 PERCPU_SECTION(L1_CACHE_BYTES) 130#endif 131 132#ifdef CONFIG_HAVE_TCM 133 ARM_TCM 134#endif 135 136#ifdef CONFIG_STRICT_KERNEL_RWX 137 . = ALIGN(1<<SECTION_SHIFT); 138#else 139 . = ALIGN(THREAD_SIZE); 140#endif 141 __init_end = .; 142 143 _sdata = .; 144 RW_DATA(L1_CACHE_BYTES, PAGE_SIZE, THREAD_SIZE) 145 _edata = .; 146 147 BSS_SECTION(0, 0, 0) 148#ifdef CONFIG_ARM_MPU 149 . = ALIGN(PMSAv8_MINALIGN); 150#endif 151 _end = .; 152 153 STABS_DEBUG 154} 155 156#ifdef CONFIG_STRICT_KERNEL_RWX 157/* 158 * Without CONFIG_DEBUG_ALIGN_RODATA, __start_rodata_section_aligned will 159 * be the first section-aligned location after __start_rodata. Otherwise, 160 * it will be equal to __start_rodata. 161 */ 162__start_rodata_section_aligned = ALIGN(__start_rodata, 1 << SECTION_SHIFT); 163#endif 164 165/* 166 * These must never be empty 167 * If you have to comment these two assert statements out, your 168 * binutils is too old (for other reasons as well) 169 */ 170ASSERT((__proc_info_end - __proc_info_begin), "missing CPU support") 171ASSERT((__arch_info_end - __arch_info_begin), "no machine record defined") 172 173/* 174 * The HYP init code can't be more than a page long, 175 * and should not cross a page boundary. 176 * The above comment applies as well. 177 */ 178ASSERT(__hyp_idmap_text_end - (__hyp_idmap_text_start & PAGE_MASK) <= PAGE_SIZE, 179 "HYP init code too big or misaligned") 180 181#endif /* CONFIG_XIP_KERNEL */ 182