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 11#define PROC_INFO \ 12 VMLINUX_SYMBOL(__proc_info_begin) = .; \ 13 *(.proc.info.init) \ 14 VMLINUX_SYMBOL(__proc_info_end) = .; 15 16#ifdef CONFIG_HOTPLUG_CPU 17#define ARM_CPU_DISCARD(x) 18#define ARM_CPU_KEEP(x) x 19#else 20#define ARM_CPU_DISCARD(x) x 21#define ARM_CPU_KEEP(x) 22#endif 23 24#if defined(CONFIG_SMP_ON_UP) && !defined(CONFIG_DEBUG_SPINLOCK) 25#define ARM_EXIT_KEEP(x) x 26#else 27#define ARM_EXIT_KEEP(x) 28#endif 29 30OUTPUT_ARCH(arm) 31ENTRY(stext) 32 33#ifndef __ARMEB__ 34jiffies = jiffies_64; 35#else 36jiffies = jiffies_64 + 4; 37#endif 38 39SECTIONS 40{ 41 /* 42 * unwind exit sections must be discarded before the rest of the 43 * unwind sections get included. 44 */ 45 /DISCARD/ : { 46 *(.ARM.exidx.exit.text) 47 *(.ARM.extab.exit.text) 48 ARM_CPU_DISCARD(*(.ARM.exidx.cpuexit.text)) 49 ARM_CPU_DISCARD(*(.ARM.extab.cpuexit.text)) 50#ifndef CONFIG_HOTPLUG 51 *(.ARM.exidx.devexit.text) 52 *(.ARM.extab.devexit.text) 53#endif 54#ifndef CONFIG_MMU 55 *(.fixup) 56 *(__ex_table) 57#endif 58#ifndef CONFIG_SMP_ON_UP 59 *(.alt.smp.init) 60#endif 61 } 62 63#ifdef CONFIG_XIP_KERNEL 64 . = XIP_VIRT_ADDR(CONFIG_XIP_PHYS_ADDR); 65#else 66 . = PAGE_OFFSET + TEXT_OFFSET; 67#endif 68 .head.text : { 69 _text = .; 70 HEAD_TEXT 71 } 72 .text : { /* Real text segment */ 73 _stext = .; /* Text and read-only data */ 74 __exception_text_start = .; 75 *(.exception.text) 76 __exception_text_end = .; 77 IRQENTRY_TEXT 78 TEXT_TEXT 79 SCHED_TEXT 80 LOCK_TEXT 81 KPROBES_TEXT 82#ifdef CONFIG_MMU 83 *(.fixup) 84#endif 85 *(.gnu.warning) 86 *(.glue_7) 87 *(.glue_7t) 88 . = ALIGN(4); 89 *(.got) /* Global offset table */ 90 ARM_CPU_KEEP(PROC_INFO) 91 } 92 93 RO_DATA(PAGE_SIZE) 94 95#ifdef CONFIG_ARM_UNWIND 96 /* 97 * Stack unwinding tables 98 */ 99 . = ALIGN(8); 100 .ARM.unwind_idx : { 101 __start_unwind_idx = .; 102 *(.ARM.exidx*) 103 __stop_unwind_idx = .; 104 } 105 .ARM.unwind_tab : { 106 __start_unwind_tab = .; 107 *(.ARM.extab*) 108 __stop_unwind_tab = .; 109 } 110#endif 111 112 _etext = .; /* End of text and rodata section */ 113 114#ifndef CONFIG_XIP_KERNEL 115 . = ALIGN(PAGE_SIZE); 116 __init_begin = .; 117#endif 118 119 INIT_TEXT_SECTION(8) 120 .exit.text : { 121 ARM_EXIT_KEEP(EXIT_TEXT) 122 } 123 .init.proc.info : { 124 ARM_CPU_DISCARD(PROC_INFO) 125 } 126 .init.arch.info : { 127 __arch_info_begin = .; 128 *(.arch.info.init) 129 __arch_info_end = .; 130 } 131 .init.tagtable : { 132 __tagtable_begin = .; 133 *(.taglist.init) 134 __tagtable_end = .; 135 } 136#ifdef CONFIG_SMP_ON_UP 137 .init.smpalt : { 138 __smpalt_begin = .; 139 *(.alt.smp.init) 140 __smpalt_end = .; 141 } 142#endif 143 .init.pv_table : { 144 __pv_table_begin = .; 145 *(.pv_table) 146 __pv_table_end = .; 147 } 148 .init.data : { 149#ifndef CONFIG_XIP_KERNEL 150 INIT_DATA 151#endif 152 INIT_SETUP(16) 153 INIT_CALLS 154 CON_INITCALL 155 SECURITY_INITCALL 156 INIT_RAM_FS 157 } 158#ifndef CONFIG_XIP_KERNEL 159 .exit.data : { 160 ARM_EXIT_KEEP(EXIT_DATA) 161 } 162#endif 163 164 PERCPU_SECTION(32) 165 166#ifdef CONFIG_XIP_KERNEL 167 __data_loc = ALIGN(4); /* location in binary */ 168 . = PAGE_OFFSET + TEXT_OFFSET; 169#else 170 __init_end = .; 171 . = ALIGN(THREAD_SIZE); 172 __data_loc = .; 173#endif 174 175 .data : AT(__data_loc) { 176 _data = .; /* address in memory */ 177 _sdata = .; 178 179 /* 180 * first, the init task union, aligned 181 * to an 8192 byte boundary. 182 */ 183 INIT_TASK_DATA(THREAD_SIZE) 184 185#ifdef CONFIG_XIP_KERNEL 186 . = ALIGN(PAGE_SIZE); 187 __init_begin = .; 188 INIT_DATA 189 ARM_EXIT_KEEP(EXIT_DATA) 190 . = ALIGN(PAGE_SIZE); 191 __init_end = .; 192#endif 193 194 NOSAVE_DATA 195 CACHELINE_ALIGNED_DATA(32) 196 READ_MOSTLY_DATA(32) 197 198 /* 199 * The exception fixup table (might need resorting at runtime) 200 */ 201 . = ALIGN(32); 202 __start___ex_table = .; 203#ifdef CONFIG_MMU 204 *(__ex_table) 205#endif 206 __stop___ex_table = .; 207 208 /* 209 * and the usual data section 210 */ 211 DATA_DATA 212 CONSTRUCTORS 213 214 _edata = .; 215 } 216 _edata_loc = __data_loc + SIZEOF(.data); 217 218#ifdef CONFIG_HAVE_TCM 219 /* 220 * We align everything to a page boundary so we can 221 * free it after init has commenced and TCM contents have 222 * been copied to its destination. 223 */ 224 .tcm_start : { 225 . = ALIGN(PAGE_SIZE); 226 __tcm_start = .; 227 __itcm_start = .; 228 } 229 230 /* 231 * Link these to the ITCM RAM 232 * Put VMA to the TCM address and LMA to the common RAM 233 * and we'll upload the contents from RAM to TCM and free 234 * the used RAM after that. 235 */ 236 .text_itcm ITCM_OFFSET : AT(__itcm_start) 237 { 238 __sitcm_text = .; 239 *(.tcm.text) 240 *(.tcm.rodata) 241 . = ALIGN(4); 242 __eitcm_text = .; 243 } 244 245 /* 246 * Reset the dot pointer, this is needed to create the 247 * relative __dtcm_start below (to be used as extern in code). 248 */ 249 . = ADDR(.tcm_start) + SIZEOF(.tcm_start) + SIZEOF(.text_itcm); 250 251 .dtcm_start : { 252 __dtcm_start = .; 253 } 254 255 /* TODO: add remainder of ITCM as well, that can be used for data! */ 256 .data_dtcm DTCM_OFFSET : AT(__dtcm_start) 257 { 258 . = ALIGN(4); 259 __sdtcm_data = .; 260 *(.tcm.data) 261 . = ALIGN(4); 262 __edtcm_data = .; 263 } 264 265 /* Reset the dot pointer or the linker gets confused */ 266 . = ADDR(.dtcm_start) + SIZEOF(.data_dtcm); 267 268 /* End marker for freeing TCM copy in linked object */ 269 .tcm_end : AT(ADDR(.dtcm_start) + SIZEOF(.data_dtcm)){ 270 . = ALIGN(PAGE_SIZE); 271 __tcm_end = .; 272 } 273#endif 274 275 NOTES 276 277 BSS_SECTION(0, 0, 0) 278 _end = .; 279 280 STABS_DEBUG 281 .comment 0 : { *(.comment) } 282 283 /* Default discards */ 284 DISCARDS 285} 286 287/* 288 * These must never be empty 289 * If you have to comment these two assert statements out, your 290 * binutils is too old (for other reasons as well) 291 */ 292ASSERT((__proc_info_end - __proc_info_begin), "missing CPU support") 293ASSERT((__arch_info_end - __arch_info_begin), "no machine record defined") 294