| 1 | /* |
| 2 | * ARM v8.3-PAuth Operations |
| 3 | * |
| 4 | * Copyright (c) 2019 Linaro, Ltd. |
| 5 | * |
| 6 | * This library is free software; you can redistribute it and/or |
| 7 | * modify it under the terms of the GNU Lesser General Public |
| 8 | * License as published by the Free Software Foundation; either |
| 9 | * version 2.1 of the License, or (at your option) any later version. |
| 10 | * |
| 11 | * This library is distributed in the hope that it will be useful, |
| 12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| 14 | * Lesser General Public License for more details. |
| 15 | * |
| 16 | * You should have received a copy of the GNU Lesser General Public |
| 17 | * License along with this library; if not, see <http://www.gnu.org/licenses/>. |
| 18 | */ |
| 19 | |
| 20 | #include "qemu/osdep.h" |
| 21 | #include "cpu.h" |
| 22 | #include "helper.h" |
| 23 | #include "internals.h" |
| 24 | #include "cpu-features.h" |
| 25 | #include "accel/tcg/cpu-ldst.h" |
| 26 | #include "helper-a64.h" |
| 27 | #include "tcg/tcg-gvec-desc.h" |
| 28 | #include "qemu/xxhash.h" |
| 29 | |
| 30 | |
| 31 | static uint64_t pac_cell_shuffle(uint64_t i) |
| 32 | { |
| 33 | uint64_t o = 0; |
| 34 | |
| 35 | o |= extract64(i, 52, 4); |
| 36 | o |= extract64(i, 24, 4) << 4; |
| 37 | o |= extract64(i, 44, 4) << 8; |
| 38 | o |= extract64(i, 0, 4) << 12; |
| 39 | |
| 40 | o |= extract64(i, 28, 4) << 16; |
| 41 | o |= extract64(i, 48, 4) << 20; |
| 42 | o |= extract64(i, 4, 4) << 24; |
| 43 | o |= extract64(i, 40, 4) << 28; |
| 44 | |
| 45 | o |= extract64(i, 32, 4) << 32; |
| 46 | o |= extract64(i, 12, 4) << 36; |
| 47 | o |= extract64(i, 56, 4) << 40; |
| 48 | o |= extract64(i, 20, 4) << 44; |
| 49 | |
| 50 | o |= extract64(i, 8, 4) << 48; |
| 51 | o |= extract64(i, 36, 4) << 52; |
| 52 | o |= extract64(i, 16, 4) << 56; |
| 53 | o |= extract64(i, 60, 4) << 60; |
| 54 | |
| 55 | return o; |
| 56 | } |
| 57 | |
| 58 | static uint64_t pac_cell_inv_shuffle(uint64_t i) |
| 59 | { |
| 60 | uint64_t o = 0; |
| 61 | |
| 62 | o |= extract64(i, 12, 4); |
| 63 | o |= extract64(i, 24, 4) << 4; |
| 64 | o |= extract64(i, 48, 4) << 8; |
| 65 | o |= extract64(i, 36, 4) << 12; |
| 66 | |
| 67 | o |= extract64(i, 56, 4) << 16; |
| 68 | o |= extract64(i, 44, 4) << 20; |
| 69 | o |= extract64(i, 4, 4) << 24; |
| 70 | o |= extract64(i, 16, 4) << 28; |
| 71 | |
| 72 | o |= i & MAKE_64BIT_MASK(32, 4); |
| 73 | o |= extract64(i, 52, 4) << 36; |
| 74 | o |= extract64(i, 28, 4) << 40; |
| 75 | o |= extract64(i, 8, 4) << 44; |
| 76 | |
| 77 | o |= extract64(i, 20, 4) << 48; |
| 78 | o |= extract64(i, 0, 4) << 52; |
| 79 | o |= extract64(i, 40, 4) << 56; |
| 80 | o |= i & MAKE_64BIT_MASK(60, 4); |
| 81 | |
| 82 | return o; |
| 83 | } |
| 84 | |
| 85 | static uint64_t pac_sub(uint64_t i) |
| 86 | { |
| 87 | static const uint8_t sub[16] = { |
| 88 | 0xb, 0x6, 0x8, 0xf, 0xc, 0x0, 0x9, 0xe, |
| 89 | 0x3, 0x7, 0x4, 0x5, 0xd, 0x2, 0x1, 0xa, |
| 90 | }; |
| 91 | uint64_t o = 0; |
| 92 | int b; |
| 93 | |
| 94 | for (b = 0; b < 64; b += 4) { |
| 95 | o |= (uint64_t)sub[(i >> b) & 0xf] << b; |
| 96 | } |
| 97 | return o; |
| 98 | } |
| 99 | |
| 100 | static uint64_t pac_sub1(uint64_t i) |
| 101 | { |
| 102 | static const uint8_t sub1[16] = { |
| 103 | 0xa, 0xd, 0xe, 0x6, 0xf, 0x7, 0x3, 0x5, |
| 104 | 0x9, 0x8, 0x0, 0xc, 0xb, 0x1, 0x2, 0x4, |
| 105 | }; |
| 106 | uint64_t o = 0; |
| 107 | int b; |
| 108 | |
| 109 | for (b = 0; b < 64; b += 4) { |
| 110 | o |= (uint64_t)sub1[(i >> b) & 0xf] << b; |
| 111 | } |
| 112 | return o; |
| 113 | } |
| 114 | |
| 115 | static uint64_t pac_inv_sub(uint64_t i) |
| 116 | { |
| 117 | static const uint8_t inv_sub[16] = { |
| 118 | 0x5, 0xe, 0xd, 0x8, 0xa, 0xb, 0x1, 0x9, |
| 119 | 0x2, 0x6, 0xf, 0x0, 0x4, 0xc, 0x7, 0x3, |
| 120 | }; |
| 121 | uint64_t o = 0; |
| 122 | int b; |
| 123 | |
| 124 | for (b = 0; b < 64; b += 4) { |
| 125 | o |= (uint64_t)inv_sub[(i >> b) & 0xf] << b; |
| 126 | } |
| 127 | return o; |
| 128 | } |
| 129 | |
| 130 | static int rot_cell(int cell, int n) |
| 131 | { |
| 132 | /* 4-bit rotate left by n. */ |
| 133 | cell |= cell << 4; |
| 134 | return extract32(cell, 4 - n, 4); |
| 135 | } |
| 136 | |
| 137 | static uint64_t pac_mult(uint64_t i) |
| 138 | { |
| 139 | uint64_t o = 0; |
| 140 | int b; |
| 141 | |
| 142 | for (b = 0; b < 4 * 4; b += 4) { |
| 143 | int i0, i4, i8, ic, t0, t1, t2, t3; |
| 144 | |
| 145 | i0 = extract64(i, b, 4); |
| 146 | i4 = extract64(i, b + 4 * 4, 4); |
| 147 | i8 = extract64(i, b + 8 * 4, 4); |
| 148 | ic = extract64(i, b + 12 * 4, 4); |
| 149 | |
| 150 | t0 = rot_cell(i8, 1) ^ rot_cell(i4, 2) ^ rot_cell(i0, 1); |
| 151 | t1 = rot_cell(ic, 1) ^ rot_cell(i4, 1) ^ rot_cell(i0, 2); |
| 152 | t2 = rot_cell(ic, 2) ^ rot_cell(i8, 1) ^ rot_cell(i0, 1); |
| 153 | t3 = rot_cell(ic, 1) ^ rot_cell(i8, 2) ^ rot_cell(i4, 1); |
| 154 | |
| 155 | o |= (uint64_t)t3 << b; |
| 156 | o |= (uint64_t)t2 << (b + 4 * 4); |
| 157 | o |= (uint64_t)t1 << (b + 8 * 4); |
| 158 | o |= (uint64_t)t0 << (b + 12 * 4); |
| 159 | } |
| 160 | return o; |
| 161 | } |
| 162 | |
| 163 | static uint64_t tweak_cell_rot(uint64_t cell) |
| 164 | { |
| 165 | return (cell >> 1) | (((cell ^ (cell >> 1)) & 1) << 3); |
| 166 | } |
| 167 | |
| 168 | static uint64_t tweak_shuffle(uint64_t i) |
| 169 | { |
| 170 | uint64_t o = 0; |
| 171 | |
| 172 | o |= extract64(i, 16, 4) << 0; |
| 173 | o |= extract64(i, 20, 4) << 4; |
| 174 | o |= tweak_cell_rot(extract64(i, 24, 4)) << 8; |
| 175 | o |= extract64(i, 28, 4) << 12; |
| 176 | |
| 177 | o |= tweak_cell_rot(extract64(i, 44, 4)) << 16; |
| 178 | o |= extract64(i, 8, 4) << 20; |
| 179 | o |= extract64(i, 12, 4) << 24; |
| 180 | o |= tweak_cell_rot(extract64(i, 32, 4)) << 28; |
| 181 | |
| 182 | o |= extract64(i, 48, 4) << 32; |
| 183 | o |= extract64(i, 52, 4) << 36; |
| 184 | o |= extract64(i, 56, 4) << 40; |
| 185 | o |= tweak_cell_rot(extract64(i, 60, 4)) << 44; |
| 186 | |
| 187 | o |= tweak_cell_rot(extract64(i, 0, 4)) << 48; |
| 188 | o |= extract64(i, 4, 4) << 52; |
| 189 | o |= tweak_cell_rot(extract64(i, 40, 4)) << 56; |
| 190 | o |= tweak_cell_rot(extract64(i, 36, 4)) << 60; |
| 191 | |
| 192 | return o; |
| 193 | } |
| 194 | |
| 195 | static uint64_t tweak_cell_inv_rot(uint64_t cell) |
| 196 | { |
| 197 | return ((cell << 1) & 0xf) | ((cell & 1) ^ (cell >> 3)); |
| 198 | } |
| 199 | |
| 200 | static uint64_t tweak_inv_shuffle(uint64_t i) |
| 201 | { |
| 202 | uint64_t o = 0; |
| 203 | |
| 204 | o |= tweak_cell_inv_rot(extract64(i, 48, 4)); |
| 205 | o |= extract64(i, 52, 4) << 4; |
| 206 | o |= extract64(i, 20, 4) << 8; |
| 207 | o |= extract64(i, 24, 4) << 12; |
| 208 | |
| 209 | o |= extract64(i, 0, 4) << 16; |
| 210 | o |= extract64(i, 4, 4) << 20; |
| 211 | o |= tweak_cell_inv_rot(extract64(i, 8, 4)) << 24; |
| 212 | o |= extract64(i, 12, 4) << 28; |
| 213 | |
| 214 | o |= tweak_cell_inv_rot(extract64(i, 28, 4)) << 32; |
| 215 | o |= tweak_cell_inv_rot(extract64(i, 60, 4)) << 36; |
| 216 | o |= tweak_cell_inv_rot(extract64(i, 56, 4)) << 40; |
| 217 | o |= tweak_cell_inv_rot(extract64(i, 16, 4)) << 44; |
| 218 | |
| 219 | o |= extract64(i, 32, 4) << 48; |
| 220 | o |= extract64(i, 36, 4) << 52; |
| 221 | o |= extract64(i, 40, 4) << 56; |
| 222 | o |= tweak_cell_inv_rot(extract64(i, 44, 4)) << 60; |
| 223 | |
| 224 | return o; |
| 225 | } |
| 226 | |
| 227 | static uint64_t pauth_computepac_architected(uint64_t data, uint64_t modifier, |
| 228 | ARMPACKey key, bool isqarma3) |
| 229 | { |
| 230 | static const uint64_t RC[5] = { |
| 231 | 0x0000000000000000ull, |
| 232 | 0x13198A2E03707344ull, |
| 233 | 0xA4093822299F31D0ull, |
| 234 | 0x082EFA98EC4E6C89ull, |
| 235 | 0x452821E638D01377ull, |
| 236 | }; |
| 237 | const uint64_t alpha = 0xC0AC29B7C97C50DDull; |
| 238 | int iterations = isqarma3 ? 2 : 4; |
| 239 | /* |
| 240 | * Note that in the ARM pseudocode, key0 contains bits <127:64> |
| 241 | * and key1 contains bits <63:0> of the 128-bit key. |
| 242 | */ |
| 243 | uint64_t key0 = key.hi, key1 = key.lo; |
| 244 | uint64_t workingval, runningmod, roundkey, modk0; |
| 245 | int i; |
| 246 | |
| 247 | modk0 = (key0 << 63) | ((key0 >> 1) ^ (key0 >> 63)); |
| 248 | runningmod = modifier; |
| 249 | workingval = data ^ key0; |
| 250 | |
| 251 | for (i = 0; i <= iterations; ++i) { |
| 252 | roundkey = key1 ^ runningmod; |
| 253 | workingval ^= roundkey; |
| 254 | workingval ^= RC[i]; |
| 255 | if (i > 0) { |
| 256 | workingval = pac_cell_shuffle(workingval); |
| 257 | workingval = pac_mult(workingval); |
| 258 | } |
| 259 | if (isqarma3) { |
| 260 | workingval = pac_sub1(workingval); |
| 261 | } else { |
| 262 | workingval = pac_sub(workingval); |
| 263 | } |
| 264 | runningmod = tweak_shuffle(runningmod); |
| 265 | } |
| 266 | roundkey = modk0 ^ runningmod; |
| 267 | workingval ^= roundkey; |
| 268 | workingval = pac_cell_shuffle(workingval); |
| 269 | workingval = pac_mult(workingval); |
| 270 | if (isqarma3) { |
| 271 | workingval = pac_sub1(workingval); |
| 272 | } else { |
| 273 | workingval = pac_sub(workingval); |
| 274 | } |
| 275 | workingval = pac_cell_shuffle(workingval); |
| 276 | workingval = pac_mult(workingval); |
| 277 | workingval ^= key1; |
| 278 | workingval = pac_cell_inv_shuffle(workingval); |
| 279 | if (isqarma3) { |
| 280 | workingval = pac_sub1(workingval); |
| 281 | } else { |
| 282 | workingval = pac_inv_sub(workingval); |
| 283 | } |
| 284 | workingval = pac_mult(workingval); |
| 285 | workingval = pac_cell_inv_shuffle(workingval); |
| 286 | workingval ^= key0; |
| 287 | workingval ^= runningmod; |
| 288 | for (i = 0; i <= iterations; ++i) { |
| 289 | if (isqarma3) { |
| 290 | workingval = pac_sub1(workingval); |
| 291 | } else { |
| 292 | workingval = pac_inv_sub(workingval); |
| 293 | } |
| 294 | if (i < iterations) { |
| 295 | workingval = pac_mult(workingval); |
| 296 | workingval = pac_cell_inv_shuffle(workingval); |
| 297 | } |
| 298 | runningmod = tweak_inv_shuffle(runningmod); |
| 299 | roundkey = key1 ^ runningmod; |
| 300 | workingval ^= RC[iterations - i]; |
| 301 | workingval ^= roundkey; |
| 302 | workingval ^= alpha; |
| 303 | } |
| 304 | workingval ^= modk0; |
| 305 | |
| 306 | return workingval; |
| 307 | } |
| 308 | |
| 309 | static uint64_t pauth_computepac_impdef(uint64_t data, uint64_t modifier, |
| 310 | ARMPACKey key) |
| 311 | { |
| 312 | return qemu_xxhash64_4(data, modifier, key.lo, key.hi); |
| 313 | } |
| 314 | |
| 315 | static uint64_t pauth_computepac(CPUARMState *env, uint64_t data, |
| 316 | uint64_t modifier, ARMPACKey key) |
| 317 | { |
| 318 | if (cpu_isar_feature(aa64_pauth_qarma5, env_archcpu(env))) { |
| 319 | return pauth_computepac_architected(data, modifier, key, false); |
| 320 | } else if (cpu_isar_feature(aa64_pauth_qarma3, env_archcpu(env))) { |
| 321 | return pauth_computepac_architected(data, modifier, key, true); |
| 322 | } else { |
| 323 | return pauth_computepac_impdef(data, modifier, key); |
| 324 | } |
| 325 | } |
| 326 | |
| 327 | static uint64_t pauth_addpac(CPUARMState *env, uint64_t ptr, uint64_t modifier, |
| 328 | ARMPACKey *key, bool data) |
| 329 | { |
| 330 | ARMCPU *cpu = env_archcpu(env); |
| 331 | ARMMMUIdx mmu_idx = arm_stage1_mmu_idx(env); |
| 332 | ARMVAParameters param = aa64_va_parameters(env, ptr, mmu_idx, data, false); |
| 333 | ARMPauthFeature pauth_feature = cpu_isar_feature(pauth_feature, cpu); |
| 334 | uint64_t pac, ext_ptr, ext, test; |
| 335 | int bot_bit, top_bit; |
| 336 | |
| 337 | /* If tagged pointers are in use, use ptr<55>, otherwise ptr<63>. */ |
| 338 | if (param.tbi) { |
| 339 | ext = sextract64(ptr, 55, 1); |
| 340 | } else { |
| 341 | ext = sextract64(ptr, 63, 1); |
| 342 | } |
| 343 | |
| 344 | /* Build a pointer with known good extension bits. */ |
| 345 | top_bit = 64 - 8 * (param.tbi || param.mtx); |
| 346 | bot_bit = 64 - param.tsz; |
| 347 | ext_ptr = deposit64(ptr, bot_bit, top_bit - bot_bit, ext); |
| 348 | /* |
| 349 | * If mtx is active but not tbi, then the top 4 bits are replaced with the |
| 350 | * ext bit, while leaving bits 56-59 alone. See InsertPAC(). |
| 351 | */ |
| 352 | if (param.mtx && !param.tbi) { |
| 353 | ext_ptr = deposit64(ext_ptr, 60, 4, ext); |
| 354 | } |
| 355 | |
| 356 | pac = pauth_computepac(env, ext_ptr, modifier, *key); |
| 357 | |
| 358 | /* |
| 359 | * Check if the ptr has good extension bits and corrupt the |
| 360 | * pointer authentication code if not. |
| 361 | */ |
| 362 | test = sextract64(ptr, bot_bit, top_bit - bot_bit); |
| 363 | if (test != 0 && test != -1) { |
| 364 | if (pauth_feature >= PauthFeat_2) { |
| 365 | /* No action required */ |
| 366 | } else if (pauth_feature == PauthFeat_EPAC) { |
| 367 | pac = 0; |
| 368 | } else { |
| 369 | /* |
| 370 | * Note that our top_bit is one greater than the pseudocode's |
| 371 | * version, hence "- 2" here. |
| 372 | */ |
| 373 | pac ^= MAKE_64BIT_MASK(top_bit - 2, 1); |
| 374 | } |
| 375 | } |
| 376 | |
| 377 | /* |
| 378 | * Preserve the determination between upper and lower at bit 55, |
| 379 | * and insert pointer authentication code. |
| 380 | */ |
| 381 | if (pauth_feature >= PauthFeat_2) { |
| 382 | pac ^= ptr; |
| 383 | } |
| 384 | if (param.tbi) { |
| 385 | ptr &= ~MAKE_64BIT_MASK(bot_bit, 55 - bot_bit + 1); |
| 386 | pac &= MAKE_64BIT_MASK(bot_bit, 54 - bot_bit + 1); |
| 387 | } else if (param.mtx) { |
| 388 | ptr &= ~(MAKE_64BIT_MASK(60, 4) | |
| 389 | MAKE_64BIT_MASK(bot_bit, 55 - bot_bit + 1)); |
| 390 | pac &= MAKE_64BIT_MASK(60, 4) | |
| 391 | MAKE_64BIT_MASK(bot_bit, 54 - bot_bit + 1); |
| 392 | } else { |
| 393 | ptr &= MAKE_64BIT_MASK(0, bot_bit); |
| 394 | pac &= ~(MAKE_64BIT_MASK(55, 1) | MAKE_64BIT_MASK(0, bot_bit)); |
| 395 | } |
| 396 | ext &= MAKE_64BIT_MASK(55, 1); |
| 397 | return pac | ext | ptr; |
| 398 | } |
| 399 | |
| 400 | static uint64_t pauth_original_ptr(uint64_t ptr, ARMVAParameters param) |
| 401 | { |
| 402 | uint64_t mask = pauth_ptr_mask(param); |
| 403 | |
| 404 | /* Note that bit 55 is used whether or not the regime has 2 ranges. */ |
| 405 | if (extract64(ptr, 55, 1)) { |
| 406 | return ptr | mask; |
| 407 | } else { |
| 408 | return ptr & ~mask; |
| 409 | } |
| 410 | } |
| 411 | |
| 412 | static G_NORETURN |
| 413 | void pauth_fail_exception(CPUARMState *env, bool data, |
| 414 | int keynumber, uintptr_t ra) |
| 415 | { |
| 416 | raise_exception_ra(env, EXCP_UDEF, syn_pacfail(data, keynumber), |
| 417 | exception_target_el(env), ra); |
| 418 | } |
| 419 | |
| 420 | static uint64_t pauth_auth(CPUARMState *env, uint64_t ptr, uint64_t modifier, |
| 421 | ARMPACKey *key, bool data, int keynumber, |
| 422 | uintptr_t ra, bool is_combined) |
| 423 | { |
| 424 | ARMCPU *cpu = env_archcpu(env); |
| 425 | ARMMMUIdx mmu_idx = arm_stage1_mmu_idx(env); |
| 426 | ARMVAParameters param = aa64_va_parameters(env, ptr, mmu_idx, data, false); |
| 427 | ARMPauthFeature pauth_feature = cpu_isar_feature(pauth_feature, cpu); |
| 428 | int bot_bit, top_bit; |
| 429 | uint64_t pac, orig_ptr, cmp_mask; |
| 430 | |
| 431 | orig_ptr = pauth_original_ptr(ptr, param); |
| 432 | pac = pauth_computepac(env, orig_ptr, modifier, *key); |
| 433 | bot_bit = 64 - param.tsz; |
| 434 | top_bit = 64 - 8 * param.tbi; |
| 435 | |
| 436 | cmp_mask = MAKE_64BIT_MASK(bot_bit, top_bit - bot_bit); |
| 437 | cmp_mask &= ~MAKE_64BIT_MASK(55, 1); |
| 438 | |
| 439 | if (param.mtx) { |
| 440 | cmp_mask &= ~MAKE_64BIT_MASK(56, 4); |
| 441 | } |
| 442 | |
| 443 | if (pauth_feature >= PauthFeat_2) { |
| 444 | ARMPauthFeature fault_feature = |
| 445 | is_combined ? PauthFeat_FPACCOMBINED : PauthFeat_FPAC; |
| 446 | uint64_t result = ptr ^ (pac & cmp_mask); |
| 447 | |
| 448 | if (pauth_feature >= fault_feature |
| 449 | && ((result ^ sextract64(result, 55, 1)) & cmp_mask)) { |
| 450 | pauth_fail_exception(env, data, keynumber, ra); |
| 451 | } |
| 452 | return result; |
| 453 | } |
| 454 | |
| 455 | if ((pac ^ ptr) & cmp_mask) { |
| 456 | int error_code = (keynumber << 1) | (keynumber ^ 1); |
| 457 | if (param.tbi) { |
| 458 | return deposit64(orig_ptr, 53, 2, error_code); |
| 459 | } else { |
| 460 | return deposit64(orig_ptr, 61, 2, error_code); |
| 461 | } |
| 462 | } |
| 463 | return orig_ptr; |
| 464 | } |
| 465 | |
| 466 | static uint64_t pauth_strip(CPUARMState *env, uint64_t ptr, bool data) |
| 467 | { |
| 468 | ARMMMUIdx mmu_idx = arm_stage1_mmu_idx(env); |
| 469 | ARMVAParameters param = aa64_va_parameters(env, ptr, mmu_idx, data, false); |
| 470 | |
| 471 | return pauth_original_ptr(ptr, param); |
| 472 | } |
| 473 | |
| 474 | static G_NORETURN |
| 475 | void pauth_trap(CPUARMState *env, int target_el, uintptr_t ra) |
| 476 | { |
| 477 | raise_exception_ra(env, EXCP_UDEF, syn_pactrap(), target_el, ra); |
| 478 | } |
| 479 | |
| 480 | static void pauth_check_trap(CPUARMState *env, int el, uintptr_t ra) |
| 481 | { |
| 482 | if (el < 2 && arm_is_el2_enabled(env)) { |
| 483 | uint64_t hcr = arm_hcr_el2_eff(env); |
| 484 | bool trap = !(hcr & HCR_API); |
| 485 | if (el == 0) { |
| 486 | /* Trap only applies to EL1&0 regime. */ |
| 487 | trap &= (hcr & (HCR_E2H | HCR_TGE)) != (HCR_E2H | HCR_TGE); |
| 488 | } |
| 489 | /* FIXME: ARMv8.3-NV: HCR_NV trap takes precedence for ERETA[AB]. */ |
| 490 | if (trap) { |
| 491 | pauth_trap(env, 2, ra); |
| 492 | } |
| 493 | } |
| 494 | if (el < 3 && arm_feature(env, ARM_FEATURE_EL3)) { |
| 495 | if (!(env->cp15.scr_el3 & SCR_API)) { |
| 496 | pauth_trap(env, 3, ra); |
| 497 | } |
| 498 | } |
| 499 | } |
| 500 | |
| 501 | static bool pauth_key_enabled(CPUARMState *env, int el, uint32_t bit) |
| 502 | { |
| 503 | return (arm_sctlr(env, el) & bit) != 0; |
| 504 | } |
| 505 | |
| 506 | uint64_t HELPER(pacia)(CPUARMState *env, uint64_t x, uint64_t y) |
| 507 | { |
| 508 | int el = arm_current_el(env); |
| 509 | if (!pauth_key_enabled(env, el, SCTLR_EnIA)) { |
| 510 | return x; |
| 511 | } |
| 512 | pauth_check_trap(env, el, GETPC()); |
| 513 | return pauth_addpac(env, x, y, &env->keys.apia, false); |
| 514 | } |
| 515 | |
| 516 | uint64_t HELPER(pacib)(CPUARMState *env, uint64_t x, uint64_t y) |
| 517 | { |
| 518 | int el = arm_current_el(env); |
| 519 | if (!pauth_key_enabled(env, el, SCTLR_EnIB)) { |
| 520 | return x; |
| 521 | } |
| 522 | pauth_check_trap(env, el, GETPC()); |
| 523 | return pauth_addpac(env, x, y, &env->keys.apib, false); |
| 524 | } |
| 525 | |
| 526 | uint64_t HELPER(pacda)(CPUARMState *env, uint64_t x, uint64_t y) |
| 527 | { |
| 528 | int el = arm_current_el(env); |
| 529 | if (!pauth_key_enabled(env, el, SCTLR_EnDA)) { |
| 530 | return x; |
| 531 | } |
| 532 | pauth_check_trap(env, el, GETPC()); |
| 533 | return pauth_addpac(env, x, y, &env->keys.apda, true); |
| 534 | } |
| 535 | |
| 536 | uint64_t HELPER(pacdb)(CPUARMState *env, uint64_t x, uint64_t y) |
| 537 | { |
| 538 | int el = arm_current_el(env); |
| 539 | if (!pauth_key_enabled(env, el, SCTLR_EnDB)) { |
| 540 | return x; |
| 541 | } |
| 542 | pauth_check_trap(env, el, GETPC()); |
| 543 | return pauth_addpac(env, x, y, &env->keys.apdb, true); |
| 544 | } |
| 545 | |
| 546 | uint64_t HELPER(pacga)(CPUARMState *env, uint64_t x, uint64_t y) |
| 547 | { |
| 548 | uint64_t pac; |
| 549 | |
| 550 | pauth_check_trap(env, arm_current_el(env), GETPC()); |
| 551 | pac = pauth_computepac(env, x, y, env->keys.apga); |
| 552 | |
| 553 | return pac & 0xffffffff00000000ull; |
| 554 | } |
| 555 | |
| 556 | static uint64_t pauth_autia(CPUARMState *env, uint64_t x, uint64_t y, |
| 557 | uintptr_t ra, bool is_combined) |
| 558 | { |
| 559 | int el = arm_current_el(env); |
| 560 | if (!pauth_key_enabled(env, el, SCTLR_EnIA)) { |
| 561 | return x; |
| 562 | } |
| 563 | pauth_check_trap(env, el, ra); |
| 564 | return pauth_auth(env, x, y, &env->keys.apia, false, 0, ra, is_combined); |
| 565 | } |
| 566 | |
| 567 | uint64_t HELPER(autia)(CPUARMState *env, uint64_t x, uint64_t y) |
| 568 | { |
| 569 | return pauth_autia(env, x, y, GETPC(), false); |
| 570 | } |
| 571 | |
| 572 | uint64_t HELPER(autia_combined)(CPUARMState *env, uint64_t x, uint64_t y) |
| 573 | { |
| 574 | return pauth_autia(env, x, y, GETPC(), true); |
| 575 | } |
| 576 | |
| 577 | static uint64_t pauth_autib(CPUARMState *env, uint64_t x, uint64_t y, |
| 578 | uintptr_t ra, bool is_combined) |
| 579 | { |
| 580 | int el = arm_current_el(env); |
| 581 | if (!pauth_key_enabled(env, el, SCTLR_EnIB)) { |
| 582 | return x; |
| 583 | } |
| 584 | pauth_check_trap(env, el, ra); |
| 585 | return pauth_auth(env, x, y, &env->keys.apib, false, 1, ra, is_combined); |
| 586 | } |
| 587 | |
| 588 | uint64_t HELPER(autib)(CPUARMState *env, uint64_t x, uint64_t y) |
| 589 | { |
| 590 | return pauth_autib(env, x, y, GETPC(), false); |
| 591 | } |
| 592 | |
| 593 | uint64_t HELPER(autib_combined)(CPUARMState *env, uint64_t x, uint64_t y) |
| 594 | { |
| 595 | return pauth_autib(env, x, y, GETPC(), true); |
| 596 | } |
| 597 | |
| 598 | static uint64_t pauth_autda(CPUARMState *env, uint64_t x, uint64_t y, |
| 599 | uintptr_t ra, bool is_combined) |
| 600 | { |
| 601 | int el = arm_current_el(env); |
| 602 | if (!pauth_key_enabled(env, el, SCTLR_EnDA)) { |
| 603 | return x; |
| 604 | } |
| 605 | pauth_check_trap(env, el, ra); |
| 606 | return pauth_auth(env, x, y, &env->keys.apda, true, 0, ra, is_combined); |
| 607 | } |
| 608 | |
| 609 | uint64_t HELPER(autda)(CPUARMState *env, uint64_t x, uint64_t y) |
| 610 | { |
| 611 | return pauth_autda(env, x, y, GETPC(), false); |
| 612 | } |
| 613 | |
| 614 | uint64_t HELPER(autda_combined)(CPUARMState *env, uint64_t x, uint64_t y) |
| 615 | { |
| 616 | return pauth_autda(env, x, y, GETPC(), true); |
| 617 | } |
| 618 | |
| 619 | static uint64_t pauth_autdb(CPUARMState *env, uint64_t x, uint64_t y, |
| 620 | uintptr_t ra, bool is_combined) |
| 621 | { |
| 622 | int el = arm_current_el(env); |
| 623 | if (!pauth_key_enabled(env, el, SCTLR_EnDB)) { |
| 624 | return x; |
| 625 | } |
| 626 | pauth_check_trap(env, el, ra); |
| 627 | return pauth_auth(env, x, y, &env->keys.apdb, true, 1, ra, is_combined); |
| 628 | } |
| 629 | |
| 630 | uint64_t HELPER(autdb)(CPUARMState *env, uint64_t x, uint64_t y) |
| 631 | { |
| 632 | return pauth_autdb(env, x, y, GETPC(), false); |
| 633 | } |
| 634 | |
| 635 | uint64_t HELPER(autdb_combined)(CPUARMState *env, uint64_t x, uint64_t y) |
| 636 | { |
| 637 | return pauth_autdb(env, x, y, GETPC(), true); |
| 638 | } |
| 639 | |
| 640 | uint64_t HELPER(xpaci)(CPUARMState *env, uint64_t a) |
| 641 | { |
| 642 | return pauth_strip(env, a, false); |
| 643 | } |
| 644 | |
| 645 | uint64_t HELPER(xpacd)(CPUARMState *env, uint64_t a) |
| 646 | { |
| 647 | return pauth_strip(env, a, true); |
| 648 | } |