vmlinux.lds.S (3513B)
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 . = KERNEL_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 RO_DATA(PAGE_SIZE) 74 75 . = ALIGN(4); 76 __ex_table : AT(ADDR(__ex_table) - LOAD_OFFSET) { 77 __start___ex_table = .; 78 ARM_MMU_KEEP(*(__ex_table)) 79 __stop___ex_table = .; 80 } 81 82#ifdef CONFIG_ARM_UNWIND 83 ARM_UNWIND_SECTIONS 84#endif 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_ALIGN); 142#endif 143 __init_end = .; 144 145 _sdata = .; 146 RW_DATA(L1_CACHE_BYTES, PAGE_SIZE, THREAD_ALIGN) 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 DWARF_DEBUG 157 ARM_DETAILS 158 159 ARM_ASSERTS 160} 161 162#ifdef CONFIG_STRICT_KERNEL_RWX 163/* 164 * Without CONFIG_DEBUG_ALIGN_RODATA, __start_rodata_section_aligned will 165 * be the first section-aligned location after __start_rodata. Otherwise, 166 * it will be equal to __start_rodata. 167 */ 168__start_rodata_section_aligned = ALIGN(__start_rodata, 1 << SECTION_SHIFT); 169#endif 170 171/* 172 * These must never be empty 173 * If you have to comment these two assert statements out, your 174 * binutils is too old (for other reasons as well) 175 */ 176ASSERT((__proc_info_end - __proc_info_begin), "missing CPU support") 177#ifndef CONFIG_COMPILE_TEST 178ASSERT((__arch_info_end - __arch_info_begin), "no machine record defined") 179#endif 180 181#endif /* CONFIG_XIP_KERNEL */