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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 418 419 420 421 422 423 424 425 426 427 428 429 430 431 432 433 434 435 436 437 438 439 440 441 442 443 444 445 446 447 448 449 450 451 452 453 454 455 456 457 458 459 460 461 462 463 464 465 466 467 468 469 470 471 472 473 474 475 476 477 478 479 480 481 482 483 484 485 486 487 488 489 490 491 492 493 494 495 496 497 498 499 500 501 502 503 504 505 506 507 508 509 510 511 512 513 514 515 516 517 518 519 520 521 522 523 524 525 526 527 528 529 530 531 532 533 534 535 536 537 538 539 540 541 542 543 544 545 546 547 548 549 550 551 552 553 554 555 556 557 558 559 560 561 562 563 564 565 566 567 568 569 570 571 572 573 574 575 576 577 578 579 580 581 582 583 584 585 586 587 588 589 590 591 592 593 594 595 596 597 598 599 600 601 602 603 604 605 606 607 608 609 610 611 612 613 614 615 616 617 618 619 620 621 622 623 624 625 626 627 628 629 630 631 632 633 634 635 636 637 638 639 640 641 642 643 644 645 646 647 648 649 650 651 652 653 654 655 656 657 658 659 660 661 662 663 664 665 666 667 668 669 670 671 672 673 674 675 676 677 678 679 680 681 682 683 684 685 686 687 688 689 690 691 692 693 694 695 696 697 698 699 700 701 702 703 704 705 706 707 708 709 710 711 712 713 714 715 716 717 718 719 720 721 722 723 724 725 726 727 728 729 730 731 732 733 734 735 736 737 738 739 740 741 742 743 744 745 746 747 748 749 750 751 752 753 754 755 756 757 758 759 760 761 762 763 764 765 766 767 768 769 770 771 772 773 774 775 776 777 778 779 780 781 782 783 784 785 786 787 788 789 790 791 792 793 794 795 796 797 798 799 800 801 802 803 804 805 806 807 808 809 810 811 812 813 814 815 816 817 818 819 820 821 822 823 824 825 826 827 828 829 830 831 832 833 834 835 836 837 838 839 840 841 842 843 844 845 846 847 848 849 850 851 852 853 854 855 856 857 858 859 860 861 862 863 864 865 866 867 868 869 870 871 872 873 874 875 876 877 878 879 880 881 882 883 884 885 886 887 888 889 890 891 892 893 894 895 896 897 898 899 900 901 902 903 904 905 906 907 908 909 910 911 912 913 914 915 916 917 918 919 920 | /* * arch/s390/kernel/mathemu.c * * S390 version * Copyright (C) 1999 IBM Deutschland Entwicklung GmbH, IBM Corporation * Author(s): Martin Schwidefsky (schwidefsky@de.ibm.com), * * 'mathemu.c' handles IEEE instructions on a S390 processor * that does not have the IEEE fpu */ #include <linux/config.h> #include <linux/kernel.h> #include <linux/errno.h> #include <linux/ptrace.h> #include <asm/uaccess.h> #include <asm/mathemu.h> #ifdef CONFIG_SYSCTL int sysctl_ieee_emulation_warnings=1; #endif static void display_emulation_not_implemented(char *instr) { struct pt_regs *regs; __u16 *location; #if CONFIG_SYSCTL if(sysctl_ieee_emulation_warnings) #endif { regs=current->thread.regs; location = (__u16 *)(regs->psw.addr-S390_lowcore.pgm_ilc); printk("%s ieee fpu instruction not emulated process name: %s pid: %d \n", instr, current->comm, current->pid); printk("%s's PSW: %08lx %08lx\n",instr, (unsigned long) regs->psw.mask, (unsigned long) location); } } static void set_CC_df(__u64 val1,__u64 val2) { int rc; rc = __cmpdf2(val1,val2); current->thread.regs->psw.mask &= 0xFFFFCFFFFFFFFFFFL; switch (rc) { case -1: current->thread.regs->psw.mask |= 0x0000100000000000L; break; case 1: current->thread.regs->psw.mask |= 0x0000200000000000L; break; } } static void set_CC_sf(__u32 val1,__u32 val2) { int rc; rc = __cmpsf2(val1,val2); current->thread.regs->psw.mask &= 0xFFFFCFFFFFFFFFFF; switch (rc) { case -1: current->thread.regs->psw.mask |= 0x0000100000000000L; break; case 1: current->thread.regs->psw.mask |= 0x0000200000000000L; break; } } static void emu_adb (int rx, __u64 val) { current->thread.fp_regs.fprs[rx].d = __adddf3(current->thread.fp_regs.fprs[rx].d,val); set_CC_df(current->thread.fp_regs.fprs[rx].d,0ULL); } static void emu_adbr (int rx, int ry) { current->thread.fp_regs.fprs[rx].d = __adddf3(current->thread.fp_regs.fprs[rx].d, current->thread.fp_regs.fprs[ry].d); set_CC_df(current->thread.fp_regs.fprs[rx].d,0ULL); } static void emu_aeb (int rx, __u32 val) { current->thread.fp_regs.fprs[rx].f = __addsf3(current->thread.fp_regs.fprs[rx].f,val); set_CC_sf(current->thread.fp_regs.fprs[rx].f,0); } static void emu_aebr (int rx, int ry) { current->thread.fp_regs.fprs[rx].f = __addsf3(current->thread.fp_regs.fprs[rx].f, current->thread.fp_regs.fprs[ry].f); set_CC_sf(current->thread.fp_regs.fprs[rx].f,0); } static void emu_axbr (int rx, int ry) { display_emulation_not_implemented("axbr"); } static void emu_cdb (int rx, __u64 val) { set_CC_df(current->thread.fp_regs.fprs[rx].d,val); } static void emu_cdbr (int rx, int ry) { set_CC_df(current->thread.fp_regs.fprs[rx].d,current->thread.fp_regs.fprs[ry].d); } static void emu_cdfbr (int rx, int ry) { current->thread.fp_regs.fprs[rx].d = __floatsidf(current->thread.regs->gprs[ry]); } static void emu_ceb (int rx, __u32 val) { set_CC_sf(current->thread.fp_regs.fprs[rx].f,val); } static void emu_cebr (int rx, int ry) { set_CC_sf(current->thread.fp_regs.fprs[rx].f,current->thread.fp_regs.fprs[ry].f); } static void emu_cefbr (int rx, int ry) { current->thread.fp_regs.fprs[rx].f = __floatsisf(current->thread.regs->gprs[ry]); } static void emu_cfdbr (int rx, int ry, int mask) { current->thread.regs->gprs[rx] = __fixdfsi(current->thread.fp_regs.fprs[ry].d); } static void emu_cfebr (int rx, int ry, int mask) { current->thread.regs->gprs[rx] = __fixsfsi(current->thread.fp_regs.fprs[ry].f); } static void emu_cfxbr (int rx, int ry, int mask) { display_emulation_not_implemented("cfxbr"); } static void emu_cxbr (int rx, int ry) { display_emulation_not_implemented("cxbr"); } static void emu_cxfbr (int rx, int ry) { display_emulation_not_implemented("cxfbr"); } static void emu_ddb (int rx, __u64 val) { current->thread.fp_regs.fprs[rx].d = __divdf3(current->thread.fp_regs.fprs[rx].d,val); set_CC_df(current->thread.fp_regs.fprs[rx].d,0ULL); } static void emu_ddbr (int rx, int ry) { current->thread.fp_regs.fprs[rx].d = __divdf3(current->thread.fp_regs.fprs[rx].d, current->thread.fp_regs.fprs[ry].d); set_CC_df(current->thread.fp_regs.fprs[rx].d,0ULL); } static void emu_deb (int rx, __u32 val) { current->thread.fp_regs.fprs[rx].f = __divsf3(current->thread.fp_regs.fprs[rx].f,val); set_CC_sf(current->thread.fp_regs.fprs[rx].f,0); } static void emu_debr (int rx, int ry) { current->thread.fp_regs.fprs[rx].f = __divsf3(current->thread.fp_regs.fprs[rx].f, current->thread.fp_regs.fprs[ry].f); set_CC_sf(current->thread.fp_regs.fprs[rx].f,0); } static void emu_didbr (int rx, int ry, int mask) { display_emulation_not_implemented("didbr"); } static void emu_diebr (int rx, int ry, int mask) { display_emulation_not_implemented("diebr"); } static void emu_dxbr (int rx, int ry) { display_emulation_not_implemented("dxbr"); } static void emu_efpc (int rx, int ry) { display_emulation_not_implemented("efpc"); } static void emu_fidbr (int rx, int ry, int mask) { display_emulation_not_implemented("fidbr"); } static void emu_fiebr (int rx, int ry, int mask) { display_emulation_not_implemented("fiebr"); } static void emu_fixbr (int rx, int ry, int mask) { display_emulation_not_implemented("fixbr"); } static void emu_kdb (int rx, __u64 val) { display_emulation_not_implemented("kdb"); } static void emu_kdbr (int rx, int ry) { display_emulation_not_implemented("kdbr"); } static void emu_keb (int rx, __u32 val) { display_emulation_not_implemented("keb"); } static void emu_kebr (int rx, int ry) { display_emulation_not_implemented("kebr"); } static void emu_kxbr (int rx, int ry) { display_emulation_not_implemented("kxbr"); } static void emu_lcdbr (int rx, int ry) { current->thread.fp_regs.fprs[rx].d = __negdf2(current->thread.fp_regs.fprs[ry].d); set_CC_df(current->thread.fp_regs.fprs[rx].d,0ULL); } static void emu_lcebr (int rx, int ry) { current->thread.fp_regs.fprs[rx].f = __negsf2(current->thread.fp_regs.fprs[ry].f); set_CC_sf(current->thread.fp_regs.fprs[rx].f,0); } static void emu_lcxbr (int rx, int ry) { display_emulation_not_implemented("lcxbr"); } static void emu_ldeb (int rx, __u32 val) { current->thread.fp_regs.fprs[rx].d = __extendsfdf2(val); } static void emu_ldebr (int rx, int ry) { current->thread.fp_regs.fprs[rx].d = __extendsfdf2(current->thread.fp_regs.fprs[ry].f); } static void emu_ldxbr (int rx, int ry) { display_emulation_not_implemented("ldxbr"); } static void emu_ledbr (int rx, int ry) { current->thread.fp_regs.fprs[rx].f = __truncdfsf2(current->thread.fp_regs.fprs[ry].d); set_CC_sf(current->thread.fp_regs.fprs[rx].f,0); } static void emu_lexbr (int rx, int ry) { display_emulation_not_implemented("lexbr"); } static void emu_lndbr (int rx, int ry) { display_emulation_not_implemented("lndbr"); } static void emu_lnebr (int rx, int ry) { display_emulation_not_implemented("lnebr"); } static void emu_lnxbr (int rx, int ry) { display_emulation_not_implemented("lnxbr"); } static void emu_lpdbr (int rx, int ry) { current->thread.fp_regs.fprs[rx].d = __absdf2(current->thread.fp_regs.fprs[ry].d); set_CC_df(current->thread.fp_regs.fprs[rx].d,0); } static void emu_lpebr (int rx, int ry) { current->thread.fp_regs.fprs[rx].f = __abssf2(current->thread.fp_regs.fprs[ry].f); set_CC_sf(current->thread.fp_regs.fprs[rx].f,0); } static void emu_lpxbr (int rx, int ry) { display_emulation_not_implemented("lpxbr"); } static void emu_ltdbr (int rx, int ry) { current->thread.fp_regs.fprs[rx].d = current->thread.fp_regs.fprs[ry].d; set_CC_df(current->thread.fp_regs.fprs[rx].d,0ULL); } static void emu_ltebr (int rx, int ry) { current->thread.fp_regs.fprs[rx].f = current->thread.fp_regs.fprs[ry].f; set_CC_sf(current->thread.fp_regs.fprs[rx].f,0); } static void emu_ltxbr (int rx, int ry) { display_emulation_not_implemented("ltxbr"); } static void emu_lxdb (int rx, __u64 val) { display_emulation_not_implemented("lxdb"); } static void emu_lxdbr (int rx, int ry) { display_emulation_not_implemented("lxdbr"); } static void emu_lxeb (int rx, __u32 val) { display_emulation_not_implemented("lxeb"); } static void emu_lxebr (int rx, int ry) { display_emulation_not_implemented("lxebr"); } static void emu_madb (int rx, __u64 val, int mask) { display_emulation_not_implemented("madb"); } static void emu_madbr (int rx, int ry, int mask) { display_emulation_not_implemented("madbr"); } static void emu_maeb (int rx, __u32 val, int mask) { display_emulation_not_implemented("maeb"); } static void emu_maebr (int rx, int ry, int mask) { display_emulation_not_implemented("maebr"); } static void emu_mdb (int rx, __u64 val) { current->thread.fp_regs.fprs[rx].d = __muldf3(current->thread.fp_regs.fprs[rx].d,val); set_CC_df(current->thread.fp_regs.fprs[rx].d,0ULL); } static void emu_mdbr (int rx, int ry) { current->thread.fp_regs.fprs[rx].d = __muldf3(current->thread.fp_regs.fprs[rx].d, current->thread.fp_regs.fprs[ry].d); set_CC_df(current->thread.fp_regs.fprs[rx].d,0ULL); } static void emu_mdeb (int rx, __u32 val) { display_emulation_not_implemented("mdeb"); } static void emu_mdebr (int rx, int ry) { display_emulation_not_implemented("mdebr"); } static void emu_meeb (int rx, __u32 val) { current->thread.fp_regs.fprs[rx].f = __mulsf3(current->thread.fp_regs.fprs[rx].f, val); set_CC_sf(current->thread.fp_regs.fprs[rx].f,0); } static void emu_meebr (int rx, int ry) { current->thread.fp_regs.fprs[rx].f = __mulsf3(current->thread.fp_regs.fprs[rx].f, current->thread.fp_regs.fprs[ry].f); set_CC_sf(current->thread.fp_regs.fprs[rx].f,0); } static void emu_msdb (int rx, __u64 val, int mask) { display_emulation_not_implemented("msdb"); } static void emu_msdbr (int rx, int ry, int mask) { display_emulation_not_implemented("msdbr"); } static void emu_mseb (int rx, __u32 val, int mask) { display_emulation_not_implemented("mseb"); } static void emu_msebr (int rx, int ry, int mask) { display_emulation_not_implemented("msebr"); } static void emu_mxbr (int rx, int ry) { display_emulation_not_implemented("mxbr"); } static void emu_mxdb (int rx, __u64 val) { display_emulation_not_implemented("mxdb"); } static void emu_mxdbr (int rx, int ry) { display_emulation_not_implemented("mxdbr"); } static void emu_sdb (int rx, __u64 val) { current->thread.fp_regs.fprs[rx].d = __subdf3(current->thread.fp_regs.fprs[rx].d, val); set_CC_sf(current->thread.fp_regs.fprs[rx].d,0ULL); } static void emu_sdbr (int rx, int ry) { current->thread.fp_regs.fprs[rx].d = __subdf3(current->thread.fp_regs.fprs[rx].d, current->thread.fp_regs.fprs[ry].d); set_CC_sf(current->thread.fp_regs.fprs[rx].d,0ULL); } static void emu_seb (int rx, __u32 val) { current->thread.fp_regs.fprs[rx].f = __subsf3(current->thread.fp_regs.fprs[rx].f, val); set_CC_sf(current->thread.fp_regs.fprs[rx].f,0); } static void emu_sebr (int rx, int ry) { current->thread.fp_regs.fprs[rx].f = __subsf3(current->thread.fp_regs.fprs[rx].f, current->thread.fp_regs.fprs[ry].f); set_CC_sf(current->thread.fp_regs.fprs[rx].f,0); } static void emu_sfpc (int rx, int ry) { display_emulation_not_implemented("sfpc"); } static void emu_sqdb (int rx, __u64 val) { display_emulation_not_implemented("sqdb"); } static void emu_sqdbr (int rx, int ry) { display_emulation_not_implemented("sqdbr"); } static void emu_sqeb (int rx, __u32 val) { display_emulation_not_implemented("sqeb"); } static void emu_sqebr (int rx, int ry) { display_emulation_not_implemented("sqebr"); } static void emu_sqxbr (int rx, int ry) { display_emulation_not_implemented("sqxbr"); } static void emu_sxbr (int rx, int ry) { display_emulation_not_implemented("sxbr"); } static void emu_tcdb (int rx, __u64 val) { display_emulation_not_implemented("tcdb"); } static void emu_tceb (int rx, __u32 val) { display_emulation_not_implemented("tceb"); } static void emu_tcxb (int rx, __u64 val) { display_emulation_not_implemented("tcxb"); } static inline void emu_load_regd(int reg) { if ((reg&9) == 0) { /* test if reg in {0,2,4,6} */ __asm__ __volatile ( /* load reg from fp_regs.fprs[reg] */ " bras 1,0f\n" " ld 0,0(%1)\n" "0: ex %0,0(1)" : /* no output */ : "a" (reg<<4), "a" (¤t->thread.fp_regs.fprs[reg].d) : "1" ); } } static inline void emu_load_rege(int reg) { if ((reg&9) == 0) { /* test if reg in {0,2,4,6} */ __asm__ __volatile ( /* load reg from fp_regs.fprs[reg] */ " bras 1,0f\n" " le 0,0(%1)\n" "0: ex %0,0(1)" : /* no output */ : "a" (reg<<4), "a" (¤t->thread.fp_regs.fprs[reg].f) : "1" ); } } static inline void emu_store_regd(int reg) { if ((reg&9) == 0) { /* test if reg in {0,2,4,6} */ __asm__ __volatile ( /* store reg to fp_regs.fprs[reg] */ " bras 1,0f\n" " std 0,0(%1)\n" "0: ex %0,0(1)" : /* no output */ : "a" (reg<<4), "a" (¤t->thread.fp_regs.fprs[reg].d) : "1" ); } } static inline void emu_store_rege(int reg) { if ((reg&9) == 0) { /* test if reg in {0,2,4,6} */ __asm__ __volatile ( /* store reg to fp_regs.fprs[reg] */ " bras 1,0f\n" " ste 0,0(%1)\n" "0: ex %0,0(1)" : /* no output */ : "a" (reg<<4), "a" (¤t->thread.fp_regs.fprs[reg].f) : "1" ); } } int math_emu_b3(__u8 *opcode, struct pt_regs * regs) { static const __u8 format_table[] = { 2, 2, 2, 2, 9, 1, 2, 1, 2, 2, 2, 2, 9, 2, 4, 4, 1, 1, 1, 1, 2, 1, 1, 2, 1, 1, 1, 1, 1, 1, 3, 3, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 1, 1, 1,10, 1, 1, 3, 1, 1, 1, 1, 1, 1, 0, 0, 0, 0, 0, 4, 0, 0, 0, 4, 0, 0, 0, 3, 0, 0, 0, 3, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 2, 0, 0, 0, 0, 0, 0, 0, 5, 6, 6, 0, 7, 8, 8, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 }; static const void *jump_table[]= { emu_lpebr, emu_lnebr, emu_ltebr, emu_lcebr, emu_ldebr, emu_lxdbr, emu_lxebr, emu_mxdbr, emu_kebr, emu_cebr, emu_aebr, emu_sebr, emu_mdebr, emu_debr, emu_maebr, emu_msebr, emu_lpdbr, emu_lndbr, emu_ltdbr, emu_lcdbr, emu_sqebr, emu_sqdbr, emu_sqxbr, emu_meebr, emu_kdbr, emu_cdbr, emu_adbr, emu_sdbr, emu_mdbr, emu_ddbr, emu_madbr, emu_msdbr, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, emu_lpxbr, emu_lnxbr, emu_ltxbr, emu_lcxbr, emu_ledbr, emu_ldxbr, emu_lexbr, emu_fixbr, emu_kxbr, emu_cxbr, emu_axbr, emu_sxbr, emu_mxbr, emu_dxbr, NULL, NULL, NULL, NULL, NULL, emu_diebr, NULL, NULL, NULL, emu_fiebr, NULL, NULL, NULL, emu_didbr, NULL, NULL, NULL, emu_fidbr, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, emu_sfpc, NULL, NULL, NULL, NULL, NULL, NULL, NULL, emu_efpc, NULL, NULL, NULL, NULL, NULL, NULL, NULL, emu_cefbr, emu_cdfbr, emu_cxfbr, NULL, emu_cfebr, emu_cfdbr, emu_cfxbr }; switch (format_table[opcode[1]]) { case 1: /* RRE format, double operation */ emu_store_regd((opcode[3]>>4)&15); emu_store_regd(opcode[3]&15); /* call the emulation function */ ((void (*)(int, int))jump_table[opcode[1]]) (opcode[3]>>4,opcode[3]&15); emu_load_regd((opcode[3]>>4)&15); emu_load_regd(opcode[3]&15); return 0; case 2: /* RRE format, float operation */ emu_store_rege((opcode[3]>>4)&15); emu_store_rege(opcode[3]&15); /* call the emulation function */ ((void (*)(int, int))jump_table[opcode[1]]) (opcode[3]>>4,opcode[3]&15); emu_load_rege((opcode[3]>>4)&15); emu_load_rege(opcode[3]&15); return 0; case 3: /* RRF format, double operation */ emu_store_regd((opcode[3]>>4)&15); emu_store_regd(opcode[3]&15); /* call the emulation function */ ((void (*)(int, int, int))jump_table[opcode[1]]) (opcode[3]>>4,opcode[3]&15,opcode[2]>>4); emu_load_regd((opcode[3]>>4)&15); emu_load_regd(opcode[3]&15); return 0; case 4: /* RRF format, float operation */ emu_store_rege((opcode[3]>>4)&15); emu_store_rege(opcode[3]&15); /* call the emulation function */ ((void (*)(int, int, int))jump_table[opcode[1]]) (opcode[3]>>4,opcode[3]&15,opcode[2]>>4); emu_load_rege((opcode[3]>>4)&15); emu_load_rege(opcode[3]&15); return 0; case 5: /* RRE format, cefbr instruction */ emu_store_rege((opcode[3]>>4)&15); /* call the emulation function */ ((void (*)(int, int))jump_table[opcode[1]]) (opcode[3]>>4,opcode[3]&15); emu_load_rege((opcode[3]>>4)&15); return 0; case 6: /* RRE format, cdfbr & cxfbr instruction */ emu_store_regd((opcode[3]>>4)&15); /* call the emulation function */ ((void (*)(int, int))jump_table[opcode[1]]) (opcode[3]>>4,opcode[3]&15); emu_load_regd((opcode[3]>>4)&15); return 0; /* FIXME !! */ return 0; case 7: /* RRF format, cfebr instruction */ emu_store_rege(opcode[3]&15); /* call the emulation function */ ((void (*)(int, int, int))jump_table[opcode[1]]) (opcode[3]>>4,opcode[3]&15,opcode[2]>>4); return 0; case 8: /* RRF format, cfdbr & cfxbr instruction */ emu_store_regd(opcode[3]&15); /* call the emulation function */ ((void (*)(int, int, int))jump_table[opcode[1]]) (opcode[3]>>4,opcode[3]&15,opcode[2]>>4); return 0; case 9: /* RRE format, ldebr & mdebr instruction */ /* float store but double load */ emu_store_rege((opcode[3]>>4)&15); emu_store_rege(opcode[3]&15); /* call the emulation function */ ((void (*)(int, int))jump_table[opcode[1]]) (opcode[3]>>4,opcode[3]&15); emu_load_regd((opcode[3]>>4)&15); return 0; case 10: /* RRE format, ledbr instruction */ /* double store but float load */ emu_store_regd((opcode[3]>>4)&15); emu_store_regd(opcode[3]&15); /* call the emulation function */ ((void (*)(int, int))jump_table[opcode[1]]) (opcode[3]>>4,opcode[3]&15); emu_load_rege((opcode[3]>>4)&15); return 0; default: return 1; } } static void* calc_addr(struct pt_regs *regs,int rx,int rb,int disp) { rx &= 0xf; rb &= 0xf; disp &= 0xfff; return (void*) ((rx != 0 ? regs->gprs[rx] : 0) + /* index */ (rb != 0 ? regs->gprs[rb] : 0) + /* base */ disp); } int math_emu_ed(__u8 *opcode, struct pt_regs * regs) { static const __u8 format_table[] = { 0, 0, 0, 0, 5, 1, 2, 1, 2, 2, 2, 2, 5, 2, 4, 4, 2, 1, 1, 0, 2, 1, 0, 2, 1, 1, 1, 1, 1, 1, 3, 3, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 }; static const void *jump_table[]= { NULL, NULL, NULL, NULL, emu_ldeb, emu_lxdb, emu_lxeb, emu_mxdb, emu_keb, emu_ceb, emu_aeb, emu_seb, emu_mdeb, emu_deb, emu_maeb, emu_mseb, emu_tceb, emu_tcdb, emu_tcxb, NULL, emu_sqeb, emu_sqdb, NULL, emu_meeb, emu_kdb, emu_cdb, emu_adb, emu_sdb, emu_mdb, emu_ddb, emu_madb, emu_msdb }; switch (format_table[opcode[5]]) { case 1: /* RXE format, __u64 constant */ { __u64 *dxb, temp; __u32 opc; emu_store_regd((opcode[1]>>4)&15); opc = *((__u32 *) opcode); dxb = (__u64 *) calc_addr(regs,opc>>16,opc>>12,opc); /* FIXME: how to react if copy_from_user fails ? */ copy_from_user(&temp, dxb, 8); /* call the emulation function */ ((void (*)(int, __u64))jump_table[opcode[5]]) (opcode[1]>>4,temp); emu_load_regd((opcode[1]>>4)&15); return 0; } case 2: /* RXE format, __u32 constant */ { __u32 *dxb, temp; __u32 opc; emu_store_rege((opcode[1]>>4)&15); opc = *((__u32 *) opcode); dxb = (__u32 *) calc_addr(regs,opc>>16,opc>>12,opc); /* FIXME: how to react if get_user fails ? */ get_user(temp, dxb); /* call the emulation function */ ((void (*)(int, __u32))jump_table[opcode[5]]) (opcode[1]>>4,temp); emu_load_rege((opcode[1]>>4)&15); return 0; } case 3: /* RXF format, __u64 constant */ { __u32 *dxb, temp; __u32 opc; emu_store_regd((opcode[1]>>4)&15); opc = *((__u32 *) opcode); dxb = (__u32 *) calc_addr(regs,opc>>16,opc>>12,opc); /* FIXME: how to react if copy_from_user fails ? */ copy_from_user(&temp, dxb, 8); /* call the emulation function */ ((void (*)(int, __u32, int))jump_table[opcode[5]]) (opcode[1]>>4,temp,opcode[4]>>4); emu_load_regd((opcode[1]>>4)&15); return 0; } case 4: /* RXF format, __u32 constant */ { __u32 *dxb, temp; __u32 opc; emu_store_rege((opcode[1]>>4)&15); opc = *((__u32 *) opcode); dxb = (__u32 *) calc_addr(regs,opc>>16,opc>>12,opc); /* FIXME: how to react if get_user fails ? */ get_user(temp, dxb); /* call the emulation function */ ((void (*)(int, __u32, int))jump_table[opcode[5]]) (opcode[1]>>4,temp,opcode[4]>>4); emu_load_rege((opcode[1]>>4)&15); return 0; } case 5: /* RXE format, __u32 constant */ /* store_rege and load_regd */ { __u32 *dxb, temp; __u32 opc; emu_store_rege((opcode[1]>>4)&15); opc = *((__u32 *) opcode); dxb = (__u32 *) calc_addr(regs,opc>>16,opc>>12,opc); /* FIXME: how to react if get_user fails ? */ get_user(temp, dxb); /* call the emulation function */ ((void (*)(int, __u32))jump_table[opcode[5]]) (opcode[1]>>4,temp); emu_load_regd((opcode[1]>>4)&15); return 0; } default: return 1; } } /* * Emulate LDR Rx,Ry with Rx or Ry not in {0, 2, 4, 6} */ void math_emu_ldr(__u8 *opcode) { __u16 opc = *((__u16 *) opcode); if ((opc & 0x0090) == 0) { /* test if rx in {0,2,4,6} */ /* we got an exception therfore ry can't be in {0,2,4,6} */ __asm__ __volatile ( /* load rx from fp_regs.fprs[ry] */ " bras 1,0f\n" " ld 0,0(%1)\n" "0: ex %0,0(1)" : /* no output */ : "a" (opc&0x00f0), "a" (¤t->thread.fp_regs.fprs[opc&0x000f].d) : "1" ); } else if ((opc & 0x0009) == 0) { /* test if ry in {0,2,4,6} */ __asm__ __volatile ( /* store ry to fp_regs.fprs[rx] */ " bras 1,0f\n" " std 0,0(%1)\n" "0: ex %0,0(1)" : /* no output */ : "a" ((opc&0x000f)<<4), "a" (¤t->thread.fp_regs.fprs[(opc&0x00f0)>>4].d) : "1" ); } else { /* move fp_regs.fprs[ry] to fp_regs.fprs[rx] */ current->thread.fp_regs.fprs[(opc&0x00f0)>>4] = current->thread.fp_regs.fprs[opc&0x000f]; } } /* * Emulate LER Rx,Ry with Rx or Ry not in {0, 2, 4, 6} */ void math_emu_ler(__u8 *opcode) { __u16 opc = *((__u16 *) opcode); if ((opc & 0x0090) == 0) { /* test if rx in {0,2,4,6} */ /* we got an exception therfore ry can't be in {0,2,4,6} */ __asm__ __volatile ( /* load rx from fp_regs.fprs[ry] */ " bras 1,0f\n" " le 0,0(%1)\n" "0: ex %0,0(1)" : /* no output */ : "a" (opc&0x00f0), "a" (¤t->thread.fp_regs.fprs[opc&0x000f].f) : "1" ); } else if ((opc & 0x0009) == 0) { /* test if ry in {0,2,4,6} */ __asm__ __volatile ( /* store ry to fp_regs.fprs[rx] */ " bras 1,0f\n" " ste 0,0(%1)\n" "0: ex %0,0(1)" : /* no output */ : "a" ((opc&0x000f)<<4), "a" (¤t->thread.fp_regs.fprs[(opc&0x00f0)>>4].f) : "1" ); } else { /* move fp_regs.fprs[ry] to fp_regs.fprs[rx] */ current->thread.fp_regs.fprs[(opc&0x00f0)>>4] = current->thread.fp_regs.fprs[opc&0x000f]; } } /* * Emulate LD R,D(X,B) with R not in {0, 2, 4, 6} */ void math_emu_ld(__u8 *opcode, struct pt_regs * regs) { __u32 opc = *((__u32 *) opcode); __u64 *dxb; dxb = (__u64 *) calc_addr(regs,opc>>16,opc>>12,opc); /* FIXME: how to react if copy_from_user fails ? */ copy_from_user(¤t->thread.fp_regs.fprs[(opc>>20)&15].d, dxb, 8); } /* * Emulate LE R,D(X,B) with R not in {0, 2, 4, 6} */ void math_emu_le(__u8 *opcode, struct pt_regs * regs) { __u32 opc = *((__u32 *) opcode); __u32 *mem, *dxb; dxb = (__u32 *) calc_addr(regs,opc>>16,opc>>12,opc); /* FIXME: how to react if get_user fails ? */ mem = (__u32 *) (¤t->thread.fp_regs.fprs[(opc>>20)&15].f); get_user(mem[0], dxb); } /* * Emulate STD R,D(X,B) with R not in {0, 2, 4, 6} */ void math_emu_std(__u8 *opcode, struct pt_regs * regs) { __u32 opc = *((__u32 *) opcode); __u64 *dxb; dxb = (__u64 *) calc_addr(regs,opc>>16,opc>>12,opc); /* FIXME: how to react if copy_to_user fails ? */ copy_to_user(dxb, ¤t->thread.fp_regs.fprs[(opc>>20)&15].d, 8); } /* * Emulate STE R,D(X,B) with R not in {0, 2, 4, 6} */ void math_emu_ste(__u8 *opcode, struct pt_regs * regs) { __u32 opc = *((__u32 *) opcode); __u32 *mem, *dxb; dxb = (__u32 *) calc_addr(regs,opc>>16,opc>>12,opc); /* FIXME: how to react if put_user fails ? */ mem = (__u32 *) (¤t->thread.fp_regs.fprs[(opc>>20)&15].f); put_user(mem[0], dxb); } /* * Emulate LFPC D(B) */ int math_emu_lfpc(__u8 *opcode, struct pt_regs *regs) { /* FIXME: how to do that ?!? */ return 0; } /* * Emulate STFPC D(B) */ int math_emu_stfpc(__u8 *opcode, struct pt_regs *regs) { /* FIXME: how to do that ?!? */ return 0; } /* * Emulate SRNM D(B) */ int math_emu_srnm(__u8 *opcode, struct pt_regs *regs) { /* FIXME: how to do that ?!? */ return 0; } |