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 <linux/pgtable.h> 12#include <asm/vmlinux.lds.h> 13#include <asm/cache.h> 14#include <asm/thread_info.h> 15#include <asm/memory.h> 16#include <asm/mpu.h> 17#include <asm/page.h> 18 19OUTPUT_ARCH(arm) 20ENTRY(stext) 21 22#ifndef __ARMEB__ 23jiffies = jiffies_64; 24#else 25jiffies = jiffies_64 + 4; 26#endif 27 28SECTIONS 29{ 30 /* 31 * XXX: The linker does not define how output sections are 32 * assigned to input sections when there are multiple statements 33 * matching the same input section name. There is no documented 34 * order of matching. 35 * 36 * unwind exit sections must be discarded before the rest of the 37 * unwind sections get included. 38 */ 39 /DISCARD/ : { 40 ARM_DISCARD 41#ifndef CONFIG_SMP_ON_UP 42 *(.alt.smp.init) 43#endif 44#ifndef CONFIG_ARM_UNWIND 45 *(.ARM.exidx) *(.ARM.exidx.*) 46 *(.ARM.extab) *(.ARM.extab.*) 47#endif 48 } 49 50 . = PAGE_OFFSET + TEXT_OFFSET; 51 .head.text : { 52 _text = .; 53 HEAD_TEXT 54 } 55 56#ifdef CONFIG_STRICT_KERNEL_RWX 57 . = ALIGN(1<<SECTION_SHIFT); 58#endif 59 60#ifdef CONFIG_ARM_MPU 61 . = ALIGN(PMSAv8_MINALIGN); 62#endif 63 .text : { /* Real text segment */ 64 _stext = .; /* Text and read-only data */ 65 ARM_TEXT 66 } 67 68#ifdef CONFIG_DEBUG_ALIGN_RODATA 69 . = ALIGN(1<<SECTION_SHIFT); 70#endif 71 _etext = .; /* End of text section */ 72 73 .gnu.hash : { 74 *(.gnu.hash) 75 } 76 77 RO_DATA(PAGE_SIZE) 78 79 . = ALIGN(4); 80 __ex_table : AT(ADDR(__ex_table) - LOAD_OFFSET) { 81 __start___ex_table = .; 82 ARM_MMU_KEEP(*(__ex_table)) 83 __stop___ex_table = .; 84 } 85 86#ifdef CONFIG_ARM_UNWIND 87 ARM_UNWIND_SECTIONS 88#endif 89 90#ifdef CONFIG_STRICT_KERNEL_RWX 91 . = ALIGN(1<<SECTION_SHIFT); 92#else 93 . = ALIGN(PAGE_SIZE); 94#endif 95 __init_begin = .; 96 97 ARM_VECTORS 98 INIT_TEXT_SECTION(8) 99 .exit.text : { 100 ARM_EXIT_KEEP(EXIT_TEXT) 101 } 102 .init.proc.info : { 103 ARM_CPU_DISCARD(PROC_INFO) 104 } 105 .init.arch.info : { 106 __arch_info_begin = .; 107 *(.arch.info.init) 108 __arch_info_end = .; 109 } 110 .init.tagtable : { 111 __tagtable_begin = .; 112 *(.taglist.init) 113 __tagtable_end = .; 114 } 115#ifdef CONFIG_SMP_ON_UP 116 .init.smpalt : { 117 __smpalt_begin = .; 118 *(.alt.smp.init) 119 __smpalt_end = .; 120 } 121#endif 122 .rel.dyn : ALIGN(8) { 123 __rel_begin = .; 124 *(.rel .rel.* .rel.dyn .rel*) 125 } 126 __rel_end = ADDR(.rel.dyn) + SIZEOF(.rel.dyn); 127 128 .init.pv_table : { 129 __pv_table_begin = .; 130 *(.pv_table) 131 __pv_table_end = .; 132 } 133 134 INIT_DATA_SECTION(16) 135 136 .exit.data : { 137 ARM_EXIT_KEEP(EXIT_DATA) 138 } 139 140#ifdef CONFIG_SMP 141 PERCPU_SECTION(L1_CACHE_BYTES) 142#endif 143 144#ifdef CONFIG_HAVE_TCM 145 ARM_TCM 146#endif 147 148#ifdef CONFIG_STRICT_KERNEL_RWX 149 . = ALIGN(1<<SECTION_SHIFT); 150#else 151 . = ALIGN(THREAD_SIZE); 152#endif 153 __init_end = .; 154 155 _sdata = .; 156 RW_DATA(L1_CACHE_BYTES, PAGE_SIZE, THREAD_SIZE) 157 158 .data.rel.local : { 159 *(.data.rel.local) 160 } 161 162 .data.rel.ro : { 163 *(.data.rel.ro) 164 } 165 166 _edata = .; 167 168 BSS_SECTION(0, 0, 0) 169#ifdef CONFIG_ARM_MPU 170 . = ALIGN(PMSAv8_MINALIGN); 171#endif 172 _end = .; 173 174 STABS_DEBUG 175 DWARF_DEBUG 176 ARM_DETAILS 177 178 ARM_ASSERTS 179} 180 181#ifdef CONFIG_STRICT_KERNEL_RWX 182/* 183 * Without CONFIG_DEBUG_ALIGN_RODATA, __start_rodata_section_aligned will 184 * be the first section-aligned location after __start_rodata. Otherwise, 185 * it will be equal to __start_rodata. 186 */ 187__start_rodata_section_aligned = ALIGN(__start_rodata, 1 << SECTION_SHIFT); 188#endif 189 190/* 191 * These must never be empty 192 * If you have to comment these two assert statements out, your 193 * binutils is too old (for other reasons as well) 194 */ 195ASSERT((__proc_info_end - __proc_info_begin), "missing CPU support") 196ASSERT((__arch_info_end - __arch_info_begin), "no machine record defined") 197 198#endif /* CONFIG_XIP_KERNEL */ 199