1 /* 2 * This file is subject to the terms and conditions of the GNU General Public 3 * License. See the file "COPYING" in the main directory of this archive 4 * for more details. 5 * 6 * Copyright (C) 1992 Ross Biro 7 * Copyright (C) Linus Torvalds 8 * Copyright (C) 1994, 95, 96, 97, 98, 2000 Ralf Baechle 9 * Copyright (C) 1996 David S. Miller 10 * Kevin D. Kissell, kevink@mips.com and Carsten Langgaard, carstenl@mips.com 11 * Copyright (C) 1999 MIPS Technologies, Inc. 12 * Copyright (C) 2000 Ulf Carlsson 13 * 14 * At this time Linux/MIPS64 only supports syscall tracing, even for 32-bit 15 * binaries. 16 */ 17 #include <linux/compiler.h> 18 #include <linux/context_tracking.h> 19 #include <linux/elf.h> 20 #include <linux/kernel.h> 21 #include <linux/sched.h> 22 #include <linux/mm.h> 23 #include <linux/errno.h> 24 #include <linux/ptrace.h> 25 #include <linux/regset.h> 26 #include <linux/smp.h> 27 #include <linux/security.h> 28 #include <linux/tracehook.h> 29 #include <linux/audit.h> 30 #include <linux/seccomp.h> 31 #include <linux/ftrace.h> 32 33 #include <asm/byteorder.h> 34 #include <asm/cpu.h> 35 #include <asm/dsp.h> 36 #include <asm/fpu.h> 37 #include <asm/mipsregs.h> 38 #include <asm/mipsmtregs.h> 39 #include <asm/pgtable.h> 40 #include <asm/page.h> 41 #include <asm/syscall.h> 42 #include <asm/uaccess.h> 43 #include <asm/bootinfo.h> 44 #include <asm/reg.h> 45 46 #define CREATE_TRACE_POINTS 47 #include <trace/events/syscalls.h> 48 49 /* 50 * Called by kernel/ptrace.c when detaching.. 51 * 52 * Make sure single step bits etc are not set. 53 */ 54 void ptrace_disable(struct task_struct *child) 55 { 56 /* Don't load the watchpoint registers for the ex-child. */ 57 clear_tsk_thread_flag(child, TIF_LOAD_WATCH); 58 } 59 60 /* 61 * Read a general register set. We always use the 64-bit format, even 62 * for 32-bit kernels and for 32-bit processes on a 64-bit kernel. 63 * Registers are sign extended to fill the available space. 64 */ 65 int ptrace_getregs(struct task_struct *child, struct user_pt_regs __user *data) 66 { 67 struct pt_regs *regs; 68 int i; 69 70 if (!access_ok(VERIFY_WRITE, data, 38 * 8)) 71 return -EIO; 72 73 regs = task_pt_regs(child); 74 75 for (i = 0; i < 32; i++) 76 __put_user((long)regs->regs[i], (__s64 __user *)&data->regs[i]); 77 __put_user((long)regs->lo, (__s64 __user *)&data->lo); 78 __put_user((long)regs->hi, (__s64 __user *)&data->hi); 79 __put_user((long)regs->cp0_epc, (__s64 __user *)&data->cp0_epc); 80 __put_user((long)regs->cp0_badvaddr, (__s64 __user *)&data->cp0_badvaddr); 81 __put_user((long)regs->cp0_status, (__s64 __user *)&data->cp0_status); 82 __put_user((long)regs->cp0_cause, (__s64 __user *)&data->cp0_cause); 83 84 return 0; 85 } 86 87 /* 88 * Write a general register set. As for PTRACE_GETREGS, we always use 89 * the 64-bit format. On a 32-bit kernel only the lower order half 90 * (according to endianness) will be used. 91 */ 92 int ptrace_setregs(struct task_struct *child, struct user_pt_regs __user *data) 93 { 94 struct pt_regs *regs; 95 int i; 96 97 if (!access_ok(VERIFY_READ, data, 38 * 8)) 98 return -EIO; 99 100 regs = task_pt_regs(child); 101 102 for (i = 0; i < 32; i++) 103 __get_user(regs->regs[i], (__s64 __user *)&data->regs[i]); 104 __get_user(regs->lo, (__s64 __user *)&data->lo); 105 __get_user(regs->hi, (__s64 __user *)&data->hi); 106 __get_user(regs->cp0_epc, (__s64 __user *)&data->cp0_epc); 107 108 /* badvaddr, status, and cause may not be written. */ 109 110 return 0; 111 } 112 113 int ptrace_getfpregs(struct task_struct *child, __u32 __user *data) 114 { 115 int i; 116 117 if (!access_ok(VERIFY_WRITE, data, 33 * 8)) 118 return -EIO; 119 120 if (tsk_used_math(child)) { 121 union fpureg *fregs = get_fpu_regs(child); 122 for (i = 0; i < 32; i++) 123 __put_user(get_fpr64(&fregs[i], 0), 124 i + (__u64 __user *)data); 125 } else { 126 for (i = 0; i < 32; i++) 127 __put_user((__u64) -1, i + (__u64 __user *) data); 128 } 129 130 __put_user(child->thread.fpu.fcr31, data + 64); 131 __put_user(boot_cpu_data.fpu_id, data + 65); 132 133 return 0; 134 } 135 136 int ptrace_setfpregs(struct task_struct *child, __u32 __user *data) 137 { 138 union fpureg *fregs; 139 u64 fpr_val; 140 int i; 141 142 if (!access_ok(VERIFY_READ, data, 33 * 8)) 143 return -EIO; 144 145 fregs = get_fpu_regs(child); 146 147 for (i = 0; i < 32; i++) { 148 __get_user(fpr_val, i + (__u64 __user *)data); 149 set_fpr64(&fregs[i], 0, fpr_val); 150 } 151 152 __get_user(child->thread.fpu.fcr31, data + 64); 153 child->thread.fpu.fcr31 &= ~FPU_CSR_ALL_X; 154 155 /* FIR may not be written. */ 156 157 return 0; 158 } 159 160 int ptrace_get_watch_regs(struct task_struct *child, 161 struct pt_watch_regs __user *addr) 162 { 163 enum pt_watch_style style; 164 int i; 165 166 if (!cpu_has_watch || boot_cpu_data.watch_reg_use_cnt == 0) 167 return -EIO; 168 if (!access_ok(VERIFY_WRITE, addr, sizeof(struct pt_watch_regs))) 169 return -EIO; 170 171 #ifdef CONFIG_32BIT 172 style = pt_watch_style_mips32; 173 #define WATCH_STYLE mips32 174 #else 175 style = pt_watch_style_mips64; 176 #define WATCH_STYLE mips64 177 #endif 178 179 __put_user(style, &addr->style); 180 __put_user(boot_cpu_data.watch_reg_use_cnt, 181 &addr->WATCH_STYLE.num_valid); 182 for (i = 0; i < boot_cpu_data.watch_reg_use_cnt; i++) { 183 __put_user(child->thread.watch.mips3264.watchlo[i], 184 &addr->WATCH_STYLE.watchlo[i]); 185 __put_user(child->thread.watch.mips3264.watchhi[i] & 0xfff, 186 &addr->WATCH_STYLE.watchhi[i]); 187 __put_user(boot_cpu_data.watch_reg_masks[i], 188 &addr->WATCH_STYLE.watch_masks[i]); 189 } 190 for (; i < 8; i++) { 191 __put_user(0, &addr->WATCH_STYLE.watchlo[i]); 192 __put_user(0, &addr->WATCH_STYLE.watchhi[i]); 193 __put_user(0, &addr->WATCH_STYLE.watch_masks[i]); 194 } 195 196 return 0; 197 } 198 199 int ptrace_set_watch_regs(struct task_struct *child, 200 struct pt_watch_regs __user *addr) 201 { 202 int i; 203 int watch_active = 0; 204 unsigned long lt[NUM_WATCH_REGS]; 205 u16 ht[NUM_WATCH_REGS]; 206 207 if (!cpu_has_watch || boot_cpu_data.watch_reg_use_cnt == 0) 208 return -EIO; 209 if (!access_ok(VERIFY_READ, addr, sizeof(struct pt_watch_regs))) 210 return -EIO; 211 /* Check the values. */ 212 for (i = 0; i < boot_cpu_data.watch_reg_use_cnt; i++) { 213 __get_user(lt[i], &addr->WATCH_STYLE.watchlo[i]); 214 #ifdef CONFIG_32BIT 215 if (lt[i] & __UA_LIMIT) 216 return -EINVAL; 217 #else 218 if (test_tsk_thread_flag(child, TIF_32BIT_ADDR)) { 219 if (lt[i] & 0xffffffff80000000UL) 220 return -EINVAL; 221 } else { 222 if (lt[i] & __UA_LIMIT) 223 return -EINVAL; 224 } 225 #endif 226 __get_user(ht[i], &addr->WATCH_STYLE.watchhi[i]); 227 if (ht[i] & ~0xff8) 228 return -EINVAL; 229 } 230 /* Install them. */ 231 for (i = 0; i < boot_cpu_data.watch_reg_use_cnt; i++) { 232 if (lt[i] & 7) 233 watch_active = 1; 234 child->thread.watch.mips3264.watchlo[i] = lt[i]; 235 /* Set the G bit. */ 236 child->thread.watch.mips3264.watchhi[i] = ht[i]; 237 } 238 239 if (watch_active) 240 set_tsk_thread_flag(child, TIF_LOAD_WATCH); 241 else 242 clear_tsk_thread_flag(child, TIF_LOAD_WATCH); 243 244 return 0; 245 } 246 247 /* regset get/set implementations */ 248 249 #if defined(CONFIG_32BIT) || defined(CONFIG_MIPS32_O32) 250 251 static int gpr32_get(struct task_struct *target, 252 const struct user_regset *regset, 253 unsigned int pos, unsigned int count, 254 void *kbuf, void __user *ubuf) 255 { 256 struct pt_regs *regs = task_pt_regs(target); 257 u32 uregs[ELF_NGREG] = {}; 258 unsigned i; 259 260 for (i = MIPS32_EF_R1; i <= MIPS32_EF_R31; i++) { 261 /* k0/k1 are copied as zero. */ 262 if (i == MIPS32_EF_R26 || i == MIPS32_EF_R27) 263 continue; 264 265 uregs[i] = regs->regs[i - MIPS32_EF_R0]; 266 } 267 268 uregs[MIPS32_EF_LO] = regs->lo; 269 uregs[MIPS32_EF_HI] = regs->hi; 270 uregs[MIPS32_EF_CP0_EPC] = regs->cp0_epc; 271 uregs[MIPS32_EF_CP0_BADVADDR] = regs->cp0_badvaddr; 272 uregs[MIPS32_EF_CP0_STATUS] = regs->cp0_status; 273 uregs[MIPS32_EF_CP0_CAUSE] = regs->cp0_cause; 274 275 return user_regset_copyout(&pos, &count, &kbuf, &ubuf, uregs, 0, 276 sizeof(uregs)); 277 } 278 279 static int gpr32_set(struct task_struct *target, 280 const struct user_regset *regset, 281 unsigned int pos, unsigned int count, 282 const void *kbuf, const void __user *ubuf) 283 { 284 struct pt_regs *regs = task_pt_regs(target); 285 u32 uregs[ELF_NGREG]; 286 unsigned start, num_regs, i; 287 int err; 288 289 start = pos / sizeof(u32); 290 num_regs = count / sizeof(u32); 291 292 if (start + num_regs > ELF_NGREG) 293 return -EIO; 294 295 err = user_regset_copyin(&pos, &count, &kbuf, &ubuf, uregs, 0, 296 sizeof(uregs)); 297 if (err) 298 return err; 299 300 for (i = start; i < num_regs; i++) { 301 /* 302 * Cast all values to signed here so that if this is a 64-bit 303 * kernel, the supplied 32-bit values will be sign extended. 304 */ 305 switch (i) { 306 case MIPS32_EF_R1 ... MIPS32_EF_R25: 307 /* k0/k1 are ignored. */ 308 case MIPS32_EF_R28 ... MIPS32_EF_R31: 309 regs->regs[i - MIPS32_EF_R0] = (s32)uregs[i]; 310 break; 311 case MIPS32_EF_LO: 312 regs->lo = (s32)uregs[i]; 313 break; 314 case MIPS32_EF_HI: 315 regs->hi = (s32)uregs[i]; 316 break; 317 case MIPS32_EF_CP0_EPC: 318 regs->cp0_epc = (s32)uregs[i]; 319 break; 320 } 321 } 322 323 return 0; 324 } 325 326 #endif /* CONFIG_32BIT || CONFIG_MIPS32_O32 */ 327 328 #ifdef CONFIG_64BIT 329 330 static int gpr64_get(struct task_struct *target, 331 const struct user_regset *regset, 332 unsigned int pos, unsigned int count, 333 void *kbuf, void __user *ubuf) 334 { 335 struct pt_regs *regs = task_pt_regs(target); 336 u64 uregs[ELF_NGREG] = {}; 337 unsigned i; 338 339 for (i = MIPS64_EF_R1; i <= MIPS64_EF_R31; i++) { 340 /* k0/k1 are copied as zero. */ 341 if (i == MIPS64_EF_R26 || i == MIPS64_EF_R27) 342 continue; 343 344 uregs[i] = regs->regs[i - MIPS64_EF_R0]; 345 } 346 347 uregs[MIPS64_EF_LO] = regs->lo; 348 uregs[MIPS64_EF_HI] = regs->hi; 349 uregs[MIPS64_EF_CP0_EPC] = regs->cp0_epc; 350 uregs[MIPS64_EF_CP0_BADVADDR] = regs->cp0_badvaddr; 351 uregs[MIPS64_EF_CP0_STATUS] = regs->cp0_status; 352 uregs[MIPS64_EF_CP0_CAUSE] = regs->cp0_cause; 353 354 return user_regset_copyout(&pos, &count, &kbuf, &ubuf, uregs, 0, 355 sizeof(uregs)); 356 } 357 358 static int gpr64_set(struct task_struct *target, 359 const struct user_regset *regset, 360 unsigned int pos, unsigned int count, 361 const void *kbuf, const void __user *ubuf) 362 { 363 struct pt_regs *regs = task_pt_regs(target); 364 u64 uregs[ELF_NGREG]; 365 unsigned start, num_regs, i; 366 int err; 367 368 start = pos / sizeof(u64); 369 num_regs = count / sizeof(u64); 370 371 if (start + num_regs > ELF_NGREG) 372 return -EIO; 373 374 err = user_regset_copyin(&pos, &count, &kbuf, &ubuf, uregs, 0, 375 sizeof(uregs)); 376 if (err) 377 return err; 378 379 for (i = start; i < num_regs; i++) { 380 switch (i) { 381 case MIPS64_EF_R1 ... MIPS64_EF_R25: 382 /* k0/k1 are ignored. */ 383 case MIPS64_EF_R28 ... MIPS64_EF_R31: 384 regs->regs[i - MIPS64_EF_R0] = uregs[i]; 385 break; 386 case MIPS64_EF_LO: 387 regs->lo = uregs[i]; 388 break; 389 case MIPS64_EF_HI: 390 regs->hi = uregs[i]; 391 break; 392 case MIPS64_EF_CP0_EPC: 393 regs->cp0_epc = uregs[i]; 394 break; 395 } 396 } 397 398 return 0; 399 } 400 401 #endif /* CONFIG_64BIT */ 402 403 static int fpr_get(struct task_struct *target, 404 const struct user_regset *regset, 405 unsigned int pos, unsigned int count, 406 void *kbuf, void __user *ubuf) 407 { 408 unsigned i; 409 int err; 410 u64 fpr_val; 411 412 /* XXX fcr31 */ 413 414 if (sizeof(target->thread.fpu.fpr[i]) == sizeof(elf_fpreg_t)) 415 return user_regset_copyout(&pos, &count, &kbuf, &ubuf, 416 &target->thread.fpu, 417 0, sizeof(elf_fpregset_t)); 418 419 for (i = 0; i < NUM_FPU_REGS; i++) { 420 fpr_val = get_fpr64(&target->thread.fpu.fpr[i], 0); 421 err = user_regset_copyout(&pos, &count, &kbuf, &ubuf, 422 &fpr_val, i * sizeof(elf_fpreg_t), 423 (i + 1) * sizeof(elf_fpreg_t)); 424 if (err) 425 return err; 426 } 427 428 return 0; 429 } 430 431 static int fpr_set(struct task_struct *target, 432 const struct user_regset *regset, 433 unsigned int pos, unsigned int count, 434 const void *kbuf, const void __user *ubuf) 435 { 436 unsigned i; 437 int err; 438 u64 fpr_val; 439 440 /* XXX fcr31 */ 441 442 if (sizeof(target->thread.fpu.fpr[i]) == sizeof(elf_fpreg_t)) 443 return user_regset_copyin(&pos, &count, &kbuf, &ubuf, 444 &target->thread.fpu, 445 0, sizeof(elf_fpregset_t)); 446 447 for (i = 0; i < NUM_FPU_REGS; i++) { 448 err = user_regset_copyin(&pos, &count, &kbuf, &ubuf, 449 &fpr_val, i * sizeof(elf_fpreg_t), 450 (i + 1) * sizeof(elf_fpreg_t)); 451 if (err) 452 return err; 453 set_fpr64(&target->thread.fpu.fpr[i], 0, fpr_val); 454 } 455 456 return 0; 457 } 458 459 enum mips_regset { 460 REGSET_GPR, 461 REGSET_FPR, 462 }; 463 464 #if defined(CONFIG_32BIT) || defined(CONFIG_MIPS32_O32) 465 466 static const struct user_regset mips_regsets[] = { 467 [REGSET_GPR] = { 468 .core_note_type = NT_PRSTATUS, 469 .n = ELF_NGREG, 470 .size = sizeof(unsigned int), 471 .align = sizeof(unsigned int), 472 .get = gpr32_get, 473 .set = gpr32_set, 474 }, 475 [REGSET_FPR] = { 476 .core_note_type = NT_PRFPREG, 477 .n = ELF_NFPREG, 478 .size = sizeof(elf_fpreg_t), 479 .align = sizeof(elf_fpreg_t), 480 .get = fpr_get, 481 .set = fpr_set, 482 }, 483 }; 484 485 static const struct user_regset_view user_mips_view = { 486 .name = "mips", 487 .e_machine = ELF_ARCH, 488 .ei_osabi = ELF_OSABI, 489 .regsets = mips_regsets, 490 .n = ARRAY_SIZE(mips_regsets), 491 }; 492 493 #endif /* CONFIG_32BIT || CONFIG_MIPS32_O32 */ 494 495 #ifdef CONFIG_64BIT 496 497 static const struct user_regset mips64_regsets[] = { 498 [REGSET_GPR] = { 499 .core_note_type = NT_PRSTATUS, 500 .n = ELF_NGREG, 501 .size = sizeof(unsigned long), 502 .align = sizeof(unsigned long), 503 .get = gpr64_get, 504 .set = gpr64_set, 505 }, 506 [REGSET_FPR] = { 507 .core_note_type = NT_PRFPREG, 508 .n = ELF_NFPREG, 509 .size = sizeof(elf_fpreg_t), 510 .align = sizeof(elf_fpreg_t), 511 .get = fpr_get, 512 .set = fpr_set, 513 }, 514 }; 515 516 static const struct user_regset_view user_mips64_view = { 517 .name = "mips64", 518 .e_machine = ELF_ARCH, 519 .ei_osabi = ELF_OSABI, 520 .regsets = mips64_regsets, 521 .n = ARRAY_SIZE(mips64_regsets), 522 }; 523 524 #endif /* CONFIG_64BIT */ 525 526 const struct user_regset_view *task_user_regset_view(struct task_struct *task) 527 { 528 #ifdef CONFIG_32BIT 529 return &user_mips_view; 530 #else 531 #ifdef CONFIG_MIPS32_O32 532 if (test_tsk_thread_flag(task, TIF_32BIT_REGS)) 533 return &user_mips_view; 534 #endif 535 return &user_mips64_view; 536 #endif 537 } 538 539 long arch_ptrace(struct task_struct *child, long request, 540 unsigned long addr, unsigned long data) 541 { 542 int ret; 543 void __user *addrp = (void __user *) addr; 544 void __user *datavp = (void __user *) data; 545 unsigned long __user *datalp = (void __user *) data; 546 547 switch (request) { 548 /* when I and D space are separate, these will need to be fixed. */ 549 case PTRACE_PEEKTEXT: /* read word at location addr. */ 550 case PTRACE_PEEKDATA: 551 ret = generic_ptrace_peekdata(child, addr, data); 552 break; 553 554 /* Read the word at location addr in the USER area. */ 555 case PTRACE_PEEKUSR: { 556 struct pt_regs *regs; 557 union fpureg *fregs; 558 unsigned long tmp = 0; 559 560 regs = task_pt_regs(child); 561 ret = 0; /* Default return value. */ 562 563 switch (addr) { 564 case 0 ... 31: 565 tmp = regs->regs[addr]; 566 break; 567 case FPR_BASE ... FPR_BASE + 31: 568 if (!tsk_used_math(child)) { 569 /* FP not yet used */ 570 tmp = -1; 571 break; 572 } 573 fregs = get_fpu_regs(child); 574 575 #ifdef CONFIG_32BIT 576 if (test_thread_flag(TIF_32BIT_FPREGS)) { 577 /* 578 * The odd registers are actually the high 579 * order bits of the values stored in the even 580 * registers - unless we're using r2k_switch.S. 581 */ 582 tmp = get_fpr32(&fregs[(addr & ~1) - FPR_BASE], 583 addr & 1); 584 break; 585 } 586 #endif 587 tmp = get_fpr32(&fregs[addr - FPR_BASE], 0); 588 break; 589 case PC: 590 tmp = regs->cp0_epc; 591 break; 592 case CAUSE: 593 tmp = regs->cp0_cause; 594 break; 595 case BADVADDR: 596 tmp = regs->cp0_badvaddr; 597 break; 598 case MMHI: 599 tmp = regs->hi; 600 break; 601 case MMLO: 602 tmp = regs->lo; 603 break; 604 #ifdef CONFIG_CPU_HAS_SMARTMIPS 605 case ACX: 606 tmp = regs->acx; 607 break; 608 #endif 609 case FPC_CSR: 610 tmp = child->thread.fpu.fcr31; 611 break; 612 case FPC_EIR: 613 /* implementation / version register */ 614 tmp = boot_cpu_data.fpu_id; 615 break; 616 case DSP_BASE ... DSP_BASE + 5: { 617 dspreg_t *dregs; 618 619 if (!cpu_has_dsp) { 620 tmp = 0; 621 ret = -EIO; 622 goto out; 623 } 624 dregs = __get_dsp_regs(child); 625 tmp = (unsigned long) (dregs[addr - DSP_BASE]); 626 break; 627 } 628 case DSP_CONTROL: 629 if (!cpu_has_dsp) { 630 tmp = 0; 631 ret = -EIO; 632 goto out; 633 } 634 tmp = child->thread.dsp.dspcontrol; 635 break; 636 default: 637 tmp = 0; 638 ret = -EIO; 639 goto out; 640 } 641 ret = put_user(tmp, datalp); 642 break; 643 } 644 645 /* when I and D space are separate, this will have to be fixed. */ 646 case PTRACE_POKETEXT: /* write the word at location addr. */ 647 case PTRACE_POKEDATA: 648 ret = generic_ptrace_pokedata(child, addr, data); 649 break; 650 651 case PTRACE_POKEUSR: { 652 struct pt_regs *regs; 653 ret = 0; 654 regs = task_pt_regs(child); 655 656 switch (addr) { 657 case 0 ... 31: 658 regs->regs[addr] = data; 659 break; 660 case FPR_BASE ... FPR_BASE + 31: { 661 union fpureg *fregs = get_fpu_regs(child); 662 663 if (!tsk_used_math(child)) { 664 /* FP not yet used */ 665 memset(&child->thread.fpu, ~0, 666 sizeof(child->thread.fpu)); 667 child->thread.fpu.fcr31 = 0; 668 } 669 #ifdef CONFIG_32BIT 670 if (test_thread_flag(TIF_32BIT_FPREGS)) { 671 /* 672 * The odd registers are actually the high 673 * order bits of the values stored in the even 674 * registers - unless we're using r2k_switch.S. 675 */ 676 set_fpr32(&fregs[(addr & ~1) - FPR_BASE], 677 addr & 1, data); 678 break; 679 } 680 #endif 681 set_fpr64(&fregs[addr - FPR_BASE], 0, data); 682 break; 683 } 684 case PC: 685 regs->cp0_epc = data; 686 break; 687 case MMHI: 688 regs->hi = data; 689 break; 690 case MMLO: 691 regs->lo = data; 692 break; 693 #ifdef CONFIG_CPU_HAS_SMARTMIPS 694 case ACX: 695 regs->acx = data; 696 break; 697 #endif 698 case FPC_CSR: 699 child->thread.fpu.fcr31 = data & ~FPU_CSR_ALL_X; 700 break; 701 case DSP_BASE ... DSP_BASE + 5: { 702 dspreg_t *dregs; 703 704 if (!cpu_has_dsp) { 705 ret = -EIO; 706 break; 707 } 708 709 dregs = __get_dsp_regs(child); 710 dregs[addr - DSP_BASE] = data; 711 break; 712 } 713 case DSP_CONTROL: 714 if (!cpu_has_dsp) { 715 ret = -EIO; 716 break; 717 } 718 child->thread.dsp.dspcontrol = data; 719 break; 720 default: 721 /* The rest are not allowed. */ 722 ret = -EIO; 723 break; 724 } 725 break; 726 } 727 728 case PTRACE_GETREGS: 729 ret = ptrace_getregs(child, datavp); 730 break; 731 732 case PTRACE_SETREGS: 733 ret = ptrace_setregs(child, datavp); 734 break; 735 736 case PTRACE_GETFPREGS: 737 ret = ptrace_getfpregs(child, datavp); 738 break; 739 740 case PTRACE_SETFPREGS: 741 ret = ptrace_setfpregs(child, datavp); 742 break; 743 744 case PTRACE_GET_THREAD_AREA: 745 ret = put_user(task_thread_info(child)->tp_value, datalp); 746 break; 747 748 case PTRACE_GET_WATCH_REGS: 749 ret = ptrace_get_watch_regs(child, addrp); 750 break; 751 752 case PTRACE_SET_WATCH_REGS: 753 ret = ptrace_set_watch_regs(child, addrp); 754 break; 755 756 default: 757 ret = ptrace_request(child, request, addr, data); 758 break; 759 } 760 out: 761 return ret; 762 } 763 764 /* 765 * Notification of system call entry/exit 766 * - triggered by current->work.syscall_trace 767 */ 768 asmlinkage long syscall_trace_enter(struct pt_regs *regs, long syscall) 769 { 770 long ret = 0; 771 user_exit(); 772 773 if (secure_computing() == -1) 774 return -1; 775 776 if (test_thread_flag(TIF_SYSCALL_TRACE) && 777 tracehook_report_syscall_entry(regs)) 778 ret = -1; 779 780 if (unlikely(test_thread_flag(TIF_SYSCALL_TRACEPOINT))) 781 trace_sys_enter(regs, regs->regs[2]); 782 783 audit_syscall_entry(syscall, regs->regs[4], regs->regs[5], 784 regs->regs[6], regs->regs[7]); 785 return syscall; 786 } 787 788 /* 789 * Notification of system call entry/exit 790 * - triggered by current->work.syscall_trace 791 */ 792 asmlinkage void syscall_trace_leave(struct pt_regs *regs) 793 { 794 /* 795 * We may come here right after calling schedule_user() 796 * or do_notify_resume(), in which case we can be in RCU 797 * user mode. 798 */ 799 user_exit(); 800 801 audit_syscall_exit(regs); 802 803 if (unlikely(test_thread_flag(TIF_SYSCALL_TRACEPOINT))) 804 trace_sys_exit(regs, regs->regs[2]); 805 806 if (test_thread_flag(TIF_SYSCALL_TRACE)) 807 tracehook_report_syscall_exit(regs, 0); 808 809 user_enter(); 810 } 811