1/* ld script to make ARM Linux kernel 2 * taken from the i386 version by Russell King 3 * Written by Martin Mares <mj@atrey.karlin.mff.cuni.cz> 4 */ 5 6#include <asm-generic/vmlinux.lds.h> 7#include <asm/thread_info.h> 8#include <asm/memory.h> 9#include <asm/page.h> 10 11OUTPUT_ARCH(arm) 12ENTRY(stext) 13 14#ifndef __ARMEB__ 15jiffies = jiffies_64; 16#else 17jiffies = jiffies_64 + 4; 18#endif 19 20SECTIONS 21{ 22#ifdef CONFIG_XIP_KERNEL 23 . = XIP_VIRT_ADDR(CONFIG_XIP_PHYS_ADDR); 24#else 25 . = PAGE_OFFSET + TEXT_OFFSET; 26#endif 27 .text.head : { 28 _stext = .; 29 _sinittext = .; 30 *(.text.head) 31 } 32 33 .init : { /* Init code and data */ 34 INIT_TEXT 35 _einittext = .; 36 __proc_info_begin = .; 37 *(.proc.info.init) 38 __proc_info_end = .; 39 __arch_info_begin = .; 40 *(.arch.info.init) 41 __arch_info_end = .; 42 __tagtable_begin = .; 43 *(.taglist.init) 44 __tagtable_end = .; 45 . = ALIGN(16); 46 __setup_start = .; 47 *(.init.setup) 48 __setup_end = .; 49 __early_begin = .; 50 *(.early_param.init) 51 __early_end = .; 52 __initcall_start = .; 53 INITCALLS 54 __initcall_end = .; 55 __con_initcall_start = .; 56 *(.con_initcall.init) 57 __con_initcall_end = .; 58 __security_initcall_start = .; 59 *(.security_initcall.init) 60 __security_initcall_end = .; 61#ifdef CONFIG_BLK_DEV_INITRD 62 . = ALIGN(32); 63 __initramfs_start = .; 64 usr/built-in.o(.init.ramfs) 65 __initramfs_end = .; 66#endif 67 . = ALIGN(PAGE_SIZE); 68 __per_cpu_load = .; 69 __per_cpu_start = .; 70 *(.data.percpu.page_aligned) 71 *(.data.percpu) 72 *(.data.percpu.shared_aligned) 73 __per_cpu_end = .; 74#ifndef CONFIG_XIP_KERNEL 75 __init_begin = _stext; 76 INIT_DATA 77 . = ALIGN(PAGE_SIZE); 78 __init_end = .; 79#endif 80 } 81 82 /DISCARD/ : { /* Exit code and data */ 83 EXIT_TEXT 84 EXIT_DATA 85 *(.exitcall.exit) 86 *(.discard) 87 *(.ARM.exidx.exit.text) 88 *(.ARM.extab.exit.text) 89#ifndef CONFIG_HOTPLUG_CPU 90 *(.ARM.exidx.cpuexit.text) 91 *(.ARM.extab.cpuexit.text) 92#endif 93#ifndef CONFIG_HOTPLUG 94 *(.ARM.exidx.devexit.text) 95 *(.ARM.extab.devexit.text) 96#endif 97#ifndef CONFIG_MMU 98 *(.fixup) 99 *(__ex_table) 100#endif 101 } 102 103 .text : { /* Real text segment */ 104 _text = .; /* Text and read-only data */ 105 __exception_text_start = .; 106 *(.exception.text) 107 __exception_text_end = .; 108 TEXT_TEXT 109 SCHED_TEXT 110 LOCK_TEXT 111 KPROBES_TEXT 112#ifdef CONFIG_MMU 113 *(.fixup) 114#endif 115 *(.gnu.warning) 116 *(.rodata) 117 *(.rodata.*) 118 *(.glue_7) 119 *(.glue_7t) 120 *(.got) /* Global offset table */ 121 } 122 123 RO_DATA(PAGE_SIZE) 124 125 _etext = .; /* End of text and rodata section */ 126 127#ifdef CONFIG_ARM_UNWIND 128 /* 129 * Stack unwinding tables 130 */ 131 . = ALIGN(8); 132 .ARM.unwind_idx : { 133 __start_unwind_idx = .; 134 *(.ARM.exidx*) 135 __stop_unwind_idx = .; 136 } 137 .ARM.unwind_tab : { 138 __start_unwind_tab = .; 139 *(.ARM.extab*) 140 __stop_unwind_tab = .; 141 } 142#endif 143 144#ifdef CONFIG_XIP_KERNEL 145 __data_loc = ALIGN(4); /* location in binary */ 146 . = PAGE_OFFSET + TEXT_OFFSET; 147#else 148 . = ALIGN(THREAD_SIZE); 149 __data_loc = .; 150#endif 151 152 .data : AT(__data_loc) { 153 _data = .; /* address in memory */ 154 _sdata = .; 155 156 /* 157 * first, the init task union, aligned 158 * to an 8192 byte boundary. 159 */ 160 *(.data.init_task) 161 162#ifdef CONFIG_XIP_KERNEL 163 . = ALIGN(PAGE_SIZE); 164 __init_begin = .; 165 INIT_DATA 166 . = ALIGN(PAGE_SIZE); 167 __init_end = .; 168#endif 169 170 . = ALIGN(PAGE_SIZE); 171 __nosave_begin = .; 172 *(.data.nosave) 173 . = ALIGN(PAGE_SIZE); 174 __nosave_end = .; 175 176 /* 177 * then the cacheline aligned data 178 */ 179 . = ALIGN(32); 180 *(.data.cacheline_aligned) 181 182 /* 183 * The exception fixup table (might need resorting at runtime) 184 */ 185 . = ALIGN(32); 186 __start___ex_table = .; 187#ifdef CONFIG_MMU 188 *(__ex_table) 189#endif 190 __stop___ex_table = .; 191 192 /* 193 * and the usual data section 194 */ 195 DATA_DATA 196 CONSTRUCTORS 197 198 _edata = .; 199 } 200 _edata_loc = __data_loc + SIZEOF(.data); 201 202#ifdef CONFIG_HAVE_TCM 203 /* 204 * We align everything to a page boundary so we can 205 * free it after init has commenced and TCM contents have 206 * been copied to its destination. 207 */ 208 .tcm_start : { 209 . = ALIGN(PAGE_SIZE); 210 __tcm_start = .; 211 __itcm_start = .; 212 } 213 214 /* 215 * Link these to the ITCM RAM 216 * Put VMA to the TCM address and LMA to the common RAM 217 * and we'll upload the contents from RAM to TCM and free 218 * the used RAM after that. 219 */ 220 .text_itcm ITCM_OFFSET : AT(__itcm_start) 221 { 222 __sitcm_text = .; 223 *(.tcm.text) 224 *(.tcm.rodata) 225 . = ALIGN(4); 226 __eitcm_text = .; 227 } 228 229 /* 230 * Reset the dot pointer, this is needed to create the 231 * relative __dtcm_start below (to be used as extern in code). 232 */ 233 . = ADDR(.tcm_start) + SIZEOF(.tcm_start) + SIZEOF(.text_itcm); 234 235 .dtcm_start : { 236 __dtcm_start = .; 237 } 238 239 /* TODO: add remainder of ITCM as well, that can be used for data! */ 240 .data_dtcm DTCM_OFFSET : AT(__dtcm_start) 241 { 242 . = ALIGN(4); 243 __sdtcm_data = .; 244 *(.tcm.data) 245 . = ALIGN(4); 246 __edtcm_data = .; 247 } 248 249 /* Reset the dot pointer or the linker gets confused */ 250 . = ADDR(.dtcm_start) + SIZEOF(.data_dtcm); 251 252 /* End marker for freeing TCM copy in linked object */ 253 .tcm_end : AT(ADDR(.dtcm_start) + SIZEOF(.data_dtcm)){ 254 . = ALIGN(PAGE_SIZE); 255 __tcm_end = .; 256 } 257#endif 258 259 .bss : { 260 __bss_start = .; /* BSS */ 261 *(.bss) 262 *(COMMON) 263 __bss_stop = .; 264 _end = .; 265 } 266 /* Stabs debugging sections. */ 267 .stab 0 : { *(.stab) } 268 .stabstr 0 : { *(.stabstr) } 269 .stab.excl 0 : { *(.stab.excl) } 270 .stab.exclstr 0 : { *(.stab.exclstr) } 271 .stab.index 0 : { *(.stab.index) } 272 .stab.indexstr 0 : { *(.stab.indexstr) } 273 .comment 0 : { *(.comment) } 274} 275 276/* 277 * These must never be empty 278 * If you have to comment these two assert statements out, your 279 * binutils is too old (for other reasons as well) 280 */ 281ASSERT((__proc_info_end - __proc_info_begin), "missing CPU support") 282ASSERT((__arch_info_end - __arch_info_begin), "no machine record defined") 283