1/* SPDX-License-Identifier: (BSD-2-Clause AND MIT) */ 2/* 3 * Copyright (c) 2014, Linaro Limited 4 * All rights reserved. 5 * 6 * Redistribution and use in source and binary forms, with or without 7 * modification, are permitted provided that the following conditions are met: 8 * 9 * 1. Redistributions of source code must retain the above copyright notice, 10 * this list of conditions and the following disclaimer. 11 * 12 * 2. Redistributions in binary form must reproduce the above copyright notice, 13 * this list of conditions and the following disclaimer in the documentation 14 * and/or other materials provided with the distribution. 15 * 16 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" 17 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 19 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE 20 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 21 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 22 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 23 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 24 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 25 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 26 * POSSIBILITY OF SUCH DAMAGE. 27 */ 28 29/* 30 * Copyright (c) 2008-2010 Travis Geiselbrecht 31 * 32 * Permission is hereby granted, free of charge, to any person obtaining 33 * a copy of this software and associated documentation files 34 * (the "Software"), to deal in the Software without restriction, 35 * including without limitation the rights to use, copy, modify, merge, 36 * publish, distribute, sublicense, and/or sell copies of the Software, 37 * and to permit persons to whom the Software is furnished to do so, 38 * subject to the following conditions: 39 * 40 * The above copyright notice and this permission notice shall be 41 * included in all copies or substantial portions of the Software. 42 * 43 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, 44 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF 45 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. 46 * IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY 47 * CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, 48 * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE 49 * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. 50 */ 51 52#include <mm/core_mmu.h> 53#include <platform_config.h> 54#include <util.h> 55 56/* 57 * TEE_RAM_VA_START: The start virtual address of the TEE RAM 58 * TEE_TEXT_VA_START: The start virtual address of the OP-TEE text 59 */ 60#define TEE_RAM_VA_START TEE_RAM_START 61#define TEE_TEXT_VA_START (TEE_RAM_VA_START + \ 62 (TEE_LOAD_ADDR - TEE_RAM_START)) 63 64/* 65 * Note: 66 * Clang 11 (ld.lld) generates non-relocatable reference when using ROUNDDOWN() 67 * from <util.h>, which does not work with ASLR. 68 */ 69#define LD_ROUNDDOWN(x, y) ((x) - ((x) % (y))) 70 71OUTPUT_FORMAT(CFG_KERN_LINKER_FORMAT) 72OUTPUT_ARCH(CFG_KERN_LINKER_ARCH) 73 74ENTRY(_start) 75SECTIONS 76{ 77 . = TEE_TEXT_VA_START; 78#ifdef ARM32 79 ASSERT(!(TEE_TEXT_VA_START & 31), "text start should align to 32bytes") 80#endif 81#ifdef ARM64 82 ASSERT(!(TEE_TEXT_VA_START & 127), "text start should align to 128bytes") 83#endif 84 __text_start = .; 85 86 /* 87 * Memory between TEE_TEXT_VA_START and page aligned rounded down 88 * value will be mapped with unpaged "text" section attributes: 89 * likely to be read-only/executable. 90 */ 91 __flatmap_unpg_rx_start = LD_ROUNDDOWN(__text_start, SMALL_PAGE_SIZE); 92 93 .text : { 94 KEEP(*(.text._start)) 95 __identity_map_init_start = .; 96 __text_data_start = .; 97 *(.identity_map.data) 98 __text_data_end = .; 99 *(.identity_map .identity_map.* \ 100 /* 101 * The one below is needed because it's a weak 102 * symbol that may be overridden by platform 103 * specific code. 104 */ 105 .text.get_core_pos_mpidr) 106 __identity_map_init_end = .; 107 KEEP(*(.text.init .text.plat_cpu_reset_early \ 108 .text.reset .text.reset_primary .text.unhandled_cpu \ 109 .text.__assert_flat_mapped_range)) 110 111#ifdef CFG_WITH_PAGER 112 *(.text) 113/* Include list of sections needed for paging */ 114#include <text_unpaged.ld.S> 115#else 116 *(.text .text.*) 117#endif 118 *(.sram.text.glue_7* .gnu.linkonce.t.*) 119 . = ALIGN(8); 120 } 121 __text_end = .; 122 123#ifdef CFG_CORE_RODATA_NOEXEC 124 . = ALIGN(SMALL_PAGE_SIZE); 125#endif 126 __flatmap_unpg_rx_size = . - __flatmap_unpg_rx_start; 127 __flatmap_unpg_ro_start = .; 128 129 .rodata : ALIGN(8) { 130 __rodata_start = .; 131 *(.gnu.linkonce.r.*) 132#ifdef CFG_WITH_PAGER 133 *(.rodata .rodata.__unpaged .rodata.__unpaged.*) 134#include <rodata_unpaged.ld.S> 135#else 136 *(.rodata .rodata.*) 137#ifndef CFG_CORE_ASLR 138 . = ALIGN(8); 139 KEEP(*(SORT(.scattered_array*))); 140#endif 141#endif 142 . = ALIGN(8); 143 __rodata_end = .; 144 } 145 146#if defined(CFG_CORE_ASLR) 147 .data.rel.ro : { 148#if !defined(CFG_WITH_PAGER) 149 . = ALIGN(8); 150 KEEP(*(SORT(.scattered_array*))); 151#endif 152 *(.data.rel.ro.__unpaged .data.rel.ro.__unpaged.*) 153 } 154#endif 155 156 .got : { *(.got.plt) *(.got) } 157 .note.gnu.property : { *(.note.gnu.property) } 158 .plt : { *(.plt) } 159 160 .ctors : ALIGN(8) { 161 __ctor_list = .; 162 KEEP(*(.ctors .ctors.* .init_array .init_array.*)) 163 __ctor_end = .; 164 } 165 .dtors : ALIGN(8) { 166 __dtor_list = .; 167 KEEP(*(.dtors .dtors.* .fini_array .fini_array.*)) 168 __dtor_end = .; 169 } 170 171 /* .ARM.exidx is sorted, so has to go in its own output section. */ 172 .ARM.exidx : { 173 __exidx_start = .; 174 *(.ARM.exidx* .gnu.linkonce.armexidx.*) 175 __exidx_end = .; 176 } 177 178 .ARM.extab : { 179 __extab_start = .; 180 *(.ARM.extab*) 181 __extab_end = .; 182 } 183 184 /* Start page aligned read-write memory */ 185#ifdef CFG_CORE_RWDATA_NOEXEC 186 . = ALIGN(SMALL_PAGE_SIZE); 187#endif 188 __flatmap_unpg_ro_size = . - __flatmap_unpg_ro_start; 189 190#ifdef CFG_VIRTUALIZATION 191 __flatmap_nex_rw_start = . ; 192 .nex_data : ALIGN(8) { 193 *(.nex_data .nex_data.*) 194 } 195 196 .nex_bss : ALIGN(8) { 197 __nex_bss_start = .; 198 *(.nex_bss .nex_bss.*) 199 __nex_bss_end = .; 200 } 201 202 /* 203 * We want to keep all nexus memory in one place, because 204 * it should be always mapped and it is easier to map one 205 * memory region than two. 206 * Next section are NOLOAD ones, but they are followed 207 * by sections with data. Thus, this NOLOAD section will 208 * be included in the resulting binary, filled with zeroes 209 */ 210 .nex_stack (NOLOAD) : { 211 __nozi_stack_start = .; 212 KEEP(*(.nozi_stack.stack_tmp .nozi_stack.stack_abt)) 213 . = ALIGN(8); 214 __nozi_stack_end = .; 215 } 216 217 .nex_heap (NOLOAD) : { 218 __nex_heap_start = .; 219 . += CFG_CORE_NEX_HEAP_SIZE; 220 . = ALIGN(16 * 1024); 221 __nex_heap_end = .; 222 } 223 .nex_nozi (NOLOAD) : { 224 ASSERT(!(ABSOLUTE(.) & (16 * 1024 - 1)), "align nozi to 16kB"); 225 KEEP(*(.nozi.mmu.base_table .nozi.mmu.l2)) 226 } 227 228 . = ALIGN(SMALL_PAGE_SIZE); 229 230 __flatmap_nex_rw_size = . - __flatmap_nex_rw_start; 231 __flatmap_nex_rw_end = .; 232#endif 233 234 __flatmap_unpg_rw_start = .; 235 236 .data : ALIGN(8) { 237 /* writable data */ 238 __data_start_rom = .; 239 /* in one segment binaries, the rom data address is on top 240 of the ram data address */ 241 __data_start = .; 242 *(.data .data.* .gnu.linkonce.d.*) 243 . = ALIGN(8); 244 } 245 246 /* unintialized data */ 247 .bss : { 248 __data_end = .; 249 __bss_start = .; 250 *(.bss .bss.*) 251 *(.gnu.linkonce.b.*) 252 *(COMMON) 253 . = ALIGN(8); 254 __bss_end = .; 255 } 256 257 .heap1 (NOLOAD) : { 258 /* 259 * We're keeping track of the padding added before the 260 * .nozi section so we can do something useful with 261 * this otherwise wasted memory. 262 */ 263 __heap1_start = .; 264#ifndef CFG_WITH_PAGER 265 . += CFG_CORE_HEAP_SIZE; 266#endif 267#ifdef CFG_WITH_LPAE 268 . = ALIGN(4 * 1024); 269#else 270 . = ALIGN(16 * 1024); 271#endif 272 __heap1_end = .; 273 } 274 /* 275 * Uninitialized data that shouldn't be zero initialized at 276 * runtime. 277 * 278 * L1 mmu table requires 16 KiB alignment 279 */ 280 .nozi (NOLOAD) : { 281 __nozi_start = .; 282 KEEP(*(.nozi .nozi.*)) 283 . = ALIGN(16); 284 __nozi_end = .; 285 /* 286 * If virtualization is enabled, abt and tmp stacks will placed 287 * at above .nex_stack section and thread stacks will go there 288 */ 289 __nozi_stack_start = .; 290 KEEP(*(.nozi_stack .nozi_stack.*)) 291 . = ALIGN(8); 292 __nozi_stack_end = .; 293 } 294 295#ifdef CFG_WITH_PAGER 296 .heap2 (NOLOAD) : { 297 __heap2_start = .; 298 /* 299 * Reserve additional memory for heap, the total should be 300 * at least CFG_CORE_HEAP_SIZE, but count what has already 301 * been reserved in .heap1 302 */ 303 . += CFG_CORE_HEAP_SIZE - (__heap1_end - __heap1_start); 304 . = ALIGN(SMALL_PAGE_SIZE); 305 __heap2_end = .; 306 } 307 308 /* Start page aligned read-only memory */ 309 __flatmap_unpg_rw_size = . - __flatmap_unpg_rw_start; 310 311 __init_start = .; 312 __flatmap_init_rx_start = .; 313 314 ASSERT(!(__flatmap_init_rx_start & (SMALL_PAGE_SIZE - 1)), 315 "read-write memory is not paged aligned") 316 317 .text_init : { 318/* 319 * Include list of sections needed for boot initialization, this list 320 * overlaps with unpaged.ld.S but since unpaged.ld.S is first all those 321 * sections will go into the unpaged area. 322 */ 323#include <text_init.ld.S> 324 KEEP(*(.text.startup.*)); 325 /* Make sure constructor functions are available during init */ 326 KEEP(*(.text._GLOBAL__sub_*)); 327 . = ALIGN(8); 328 } 329 330#ifdef CFG_CORE_RODATA_NOEXEC 331 . = ALIGN(SMALL_PAGE_SIZE); 332#endif 333 __flatmap_init_rx_size = . - __flatmap_init_rx_start; 334 __flatmap_init_ro_start = .; 335 336 .rodata_init : { 337#include <rodata_init.ld.S> 338#ifndef CFG_CORE_ASLR 339 . = ALIGN(8); 340 KEEP(*(SORT(.scattered_array*))); 341#endif 342 } 343#ifdef CFG_CORE_ASLR 344 .data.rel.ro_init : ALIGN(8) { 345 KEEP(*(SORT(.scattered_array*))); 346 } 347#endif 348 . = ALIGN(8); 349 __ro_and_relro_data_init_end = .; 350 351 __init_end = ALIGN(__ro_and_relro_data_init_end, SMALL_PAGE_SIZE); 352 __get_tee_init_end = __init_end; 353 __init_size = __init_end - __init_start; 354 355 /* vcore flat map stops here. No need to page align, rodata follows. */ 356 __flatmap_init_ro_size = __init_end - __flatmap_init_ro_start; 357 358 .rodata_pageable : ALIGN(8) { 359 *(.rodata*) 360 } 361 362#ifdef CFG_CORE_RODATA_NOEXEC 363 . = ALIGN(SMALL_PAGE_SIZE); 364#endif 365 366 .text_pageable : ALIGN(8) { 367 *(.text*) 368 . = ALIGN(SMALL_PAGE_SIZE); 369 } 370 371 __pageable_part_end = .; 372 __pageable_part_start = __init_end; 373 __pageable_start = __init_start; 374 __pageable_end = __pageable_part_end; 375 376 ASSERT(TEE_LOAD_ADDR >= TEE_RAM_START, 377 "Load address before start of physical memory") 378 ASSERT(TEE_LOAD_ADDR < (TEE_RAM_START + TEE_RAM_PH_SIZE), 379 "Load address after end of physical memory") 380 ASSERT((TEE_RAM_VA_START + TEE_RAM_PH_SIZE - __init_end) > 381 SMALL_PAGE_SIZE, "Too few free pages to initialize paging") 382 383 384#endif /*CFG_WITH_PAGER*/ 385 386#ifdef CFG_CORE_SANITIZE_KADDRESS 387 . = TEE_RAM_VA_START + (TEE_RAM_VA_SIZE * 8) / 9 - 8; 388 . = ALIGN(8); 389 .asan_shadow : { 390 __asan_shadow_start = .; 391 . += TEE_RAM_VA_SIZE / 9; 392 __asan_shadow_end = .; 393 __asan_shadow_size = __asan_shadow_end - __asan_shadow_start; 394 } 395#endif /*CFG_CORE_SANITIZE_KADDRESS*/ 396 397 __end = .; 398 399#ifndef CFG_WITH_PAGER 400 __init_size = __data_end - TEE_TEXT_VA_START; 401#endif 402 /* 403 * Guard against moving the location counter backwards in the assignment 404 * below. 405 */ 406 ASSERT(. <= (TEE_RAM_VA_START + TEE_RAM_VA_SIZE), 407 "TEE_RAM_VA_SIZE is too small") 408 . = TEE_RAM_VA_START + TEE_RAM_VA_SIZE; 409 410 _end_of_ram = .; 411 412#ifndef CFG_WITH_PAGER 413 __flatmap_unpg_rw_size = _end_of_ram - __flatmap_unpg_rw_start; 414 __get_tee_init_end = .; 415#endif 416 417 /* 418 * These regions will not become a normal part of the dumped 419 * binary, instead some are interpreted by the dump script and 420 * converted into suitable format for OP-TEE itself to use. 421 */ 422 .dynamic : { *(.dynamic) } 423 .hash : { *(.hash) } 424 .dynsym : { *(.dynsym) } 425 .dynstr : { *(.dynstr) } 426 427 .rel : { 428 *(.rel.*) 429 } 430 .rela : { 431 *(.rela.*) 432 } 433#ifndef CFG_CORE_ASLR 434 ASSERT(SIZEOF(.rel) == 0, "Relocation entries not expected") 435 ASSERT(SIZEOF(.rela) == 0, "Relocation entries not expected") 436#endif 437 438 /DISCARD/ : { 439 /* Strip unnecessary stuff */ 440 *(.comment .note .eh_frame .interp) 441 /* Strip meta variables */ 442 *(__keep_meta_vars*) 443 } 444 445} 446 447/* Unpaged read-only memories */ 448__vcore_unpg_rx_start = __flatmap_unpg_rx_start; 449__vcore_unpg_ro_start = __flatmap_unpg_ro_start; 450#ifdef CFG_CORE_RODATA_NOEXEC 451__vcore_unpg_rx_size = __flatmap_unpg_rx_size; 452__vcore_unpg_ro_size = __flatmap_unpg_ro_size; 453#else 454__vcore_unpg_rx_size = __flatmap_unpg_rx_size + __flatmap_unpg_ro_size; 455__vcore_unpg_ro_size = 0; 456#endif 457__vcore_unpg_rx_end = __vcore_unpg_rx_start + __vcore_unpg_rx_size; 458__vcore_unpg_ro_end = __vcore_unpg_ro_start + __vcore_unpg_ro_size; 459 460/* Unpaged read-write memory */ 461__vcore_unpg_rw_start = __flatmap_unpg_rw_start; 462__vcore_unpg_rw_size = __flatmap_unpg_rw_size; 463__vcore_unpg_rw_end = __vcore_unpg_rw_start + __vcore_unpg_rw_size; 464 465#ifdef CFG_VIRTUALIZATION 466/* Nexus read-write memory */ 467__vcore_nex_rw_start = __flatmap_nex_rw_start; 468__vcore_nex_rw_size = __flatmap_nex_rw_size; 469__vcore_nex_rw_end = __vcore_nex_rw_start + __vcore_nex_rw_size; 470#endif 471 472#ifdef CFG_WITH_PAGER 473/* 474 * Core init mapping shall cover up to end of the physical RAM. 475 * This is required since the hash table is appended to the 476 * binary data after the firmware build sequence. 477 */ 478#define __FLATMAP_PAGER_TRAILING_SPACE \ 479 (TEE_RAM_START + TEE_RAM_PH_SIZE - \ 480 (__flatmap_init_ro_start + __flatmap_init_ro_size)) 481 482/* Paged/init read-only memories */ 483__vcore_init_rx_start = __flatmap_init_rx_start; 484__vcore_init_ro_start = __flatmap_init_ro_start; 485#ifdef CFG_CORE_RODATA_NOEXEC 486__vcore_init_rx_size = __flatmap_init_rx_size; 487__vcore_init_ro_size = __flatmap_init_ro_size + __FLATMAP_PAGER_TRAILING_SPACE; 488#else 489__vcore_init_rx_size = __flatmap_init_rx_size + __flatmap_init_ro_size + 490 __FLATMAP_PAGER_TRAILING_SPACE; 491__vcore_init_ro_size = 0; 492#endif /* CFG_CORE_RODATA_NOEXEC */ 493__vcore_init_rx_end = __vcore_init_rx_start + __vcore_init_rx_size; 494__vcore_init_ro_end = __vcore_init_ro_start + __vcore_init_ro_size; 495#endif /* CFG_WITH_PAGER */ 496 497#ifdef CFG_CORE_SANITIZE_KADDRESS 498__asan_map_start = (__asan_shadow_start / SMALL_PAGE_SIZE) * 499 SMALL_PAGE_SIZE; 500__asan_map_end = ((__asan_shadow_end - 1) / SMALL_PAGE_SIZE) * 501 SMALL_PAGE_SIZE + SMALL_PAGE_SIZE; 502__asan_map_size = __asan_map_end - __asan_map_start; 503#endif /*CFG_CORE_SANITIZE_KADDRESS*/ 504