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