1/* 2 * Contains the system-call and fault low-level handling routines. 3 * This also contains the timer-interrupt handler, as well as all 4 * interrupts and faults that can result in a task-switch. 5 * 6 * Copyright 2005-2009 Analog Devices Inc. 7 * 8 * Licensed under the GPL-2 or later. 9 */ 10 11/* NOTE: This code handles signal-recognition, which happens every time 12 * after a timer-interrupt and after each system call. 13 */ 14 15#include <linux/init.h> 16#include <linux/linkage.h> 17#include <linux/unistd.h> 18#include <asm/blackfin.h> 19#include <asm/errno.h> 20#include <asm/fixed_code.h> 21#include <asm/thread_info.h> /* TIF_NEED_RESCHED */ 22#include <asm/asm-offsets.h> 23#include <asm/trace.h> 24#include <asm/traps.h> 25 26#include <asm/context.S> 27 28 29#ifdef CONFIG_EXCPT_IRQ_SYSC_L1 30.section .l1.text 31#else 32.text 33#endif 34 35/* Slightly simplified and streamlined entry point for CPLB misses. 36 * This one does not lower the level to IRQ5, and thus can be used to 37 * patch up CPLB misses on the kernel stack. 38 */ 39#if ANOMALY_05000261 40#define _ex_dviol _ex_workaround_261 41#define _ex_dmiss _ex_workaround_261 42#define _ex_dmult _ex_workaround_261 43 44ENTRY(_ex_workaround_261) 45 /* 46 * Work around an anomaly: if we see a new DCPLB fault, return 47 * without doing anything. Then, if we get the same fault again, 48 * handle it. 49 */ 50 P4 = R7; /* Store EXCAUSE */ 51 52 GET_PDA(p5, r7); 53 r7 = [p5 + PDA_LFRETX]; 54 r6 = retx; 55 [p5 + PDA_LFRETX] = r6; 56 cc = r6 == r7; 57 if !cc jump _bfin_return_from_exception; 58 /* fall through */ 59 R7 = P4; 60 R6 = VEC_CPLB_M; /* Data CPLB Miss */ 61 cc = R6 == R7; 62 if cc jump _ex_dcplb_miss (BP); 63#ifdef CONFIG_MPU 64 R6 = VEC_CPLB_VL; /* Data CPLB Violation */ 65 cc = R6 == R7; 66 if cc jump _ex_dcplb_viol (BP); 67#endif 68 /* Handle Data CPLB Protection Violation 69 * and Data CPLB Multiple Hits - Linux Trap Zero 70 */ 71 jump _ex_trap_c; 72ENDPROC(_ex_workaround_261) 73 74#else 75#ifdef CONFIG_MPU 76#define _ex_dviol _ex_dcplb_viol 77#else 78#define _ex_dviol _ex_trap_c 79#endif 80#define _ex_dmiss _ex_dcplb_miss 81#define _ex_dmult _ex_trap_c 82#endif 83 84 85ENTRY(_ex_dcplb_viol) 86ENTRY(_ex_dcplb_miss) 87ENTRY(_ex_icplb_miss) 88 (R7:6,P5:4) = [sp++]; 89 /* We leave the previously pushed ASTAT on the stack. */ 90 SAVE_CONTEXT_CPLB 91 92 /* We must load R1 here, _before_ DEBUG_HWTRACE_SAVE, since that 93 * will change the stack pointer. */ 94 R0 = SEQSTAT; 95 R1 = SP; 96 97 DEBUG_HWTRACE_SAVE(p5, r7) 98 99 sp += -12; 100 call _cplb_hdr; 101 sp += 12; 102 CC = R0 == 0; 103 IF !CC JUMP _handle_bad_cplb; 104 105#ifdef CONFIG_DEBUG_DOUBLEFAULT 106 /* While we were processing this, did we double fault? */ 107 r7 = SEQSTAT; /* reason code is in bit 5:0 */ 108 r6.l = lo(SEQSTAT_EXCAUSE); 109 r6.h = hi(SEQSTAT_EXCAUSE); 110 r7 = r7 & r6; 111 r6 = 0x25; 112 CC = R7 == R6; 113 if CC JUMP _double_fault; 114#endif 115 116 DEBUG_HWTRACE_RESTORE(p5, r7) 117 RESTORE_CONTEXT_CPLB 118 ASTAT = [SP++]; 119 SP = EX_SCRATCH_REG; 120 rtx; 121ENDPROC(_ex_icplb_miss) 122 123ENTRY(_ex_syscall) 124 raise 15; /* invoked by TRAP #0, for sys call */ 125 jump.s _bfin_return_from_exception; 126ENDPROC(_ex_syscall) 127 128ENTRY(_ex_single_step) 129 /* If we just returned from an interrupt, the single step event is 130 for the RTI instruction. */ 131 r7 = retx; 132 r6 = reti; 133 cc = r7 == r6; 134 if cc jump _bfin_return_from_exception; 135 136#ifdef CONFIG_KGDB 137 /* Don't do single step in hardware exception handler */ 138 p5.l = lo(IPEND); 139 p5.h = hi(IPEND); 140 r6 = [p5]; 141 cc = bittst(r6, 4); 142 if cc jump _bfin_return_from_exception; 143 cc = bittst(r6, 5); 144 if cc jump _bfin_return_from_exception; 145 146 /* skip single step if current interrupt priority is higher than 147 * that of the first instruction, from which gdb starts single step */ 148 r6 >>= 6; 149 r7 = 10; 150.Lfind_priority_start: 151 cc = bittst(r6, 0); 152 if cc jump .Lfind_priority_done; 153 r6 >>= 1; 154 r7 += -1; 155 cc = r7 == 0; 156 if cc jump .Lfind_priority_done; 157 jump.s .Lfind_priority_start; 158.Lfind_priority_done: 159 p4.l = _kgdb_single_step; 160 p4.h = _kgdb_single_step; 161 r6 = [p4]; 162 cc = r6 == 0; 163 if cc jump .Ldo_single_step; 164 r6 += -1; 165 cc = r6 < r7; 166 if cc jump 1f; 167.Ldo_single_step: 168#else 169 /* If we were in user mode, do the single step normally. */ 170 p5.l = lo(IPEND); 171 p5.h = hi(IPEND); 172 r6 = [p5]; 173 r7 = 0xffe0 (z); 174 r7 = r7 & r6; 175 cc = r7 == 0; 176 if !cc jump 1f; 177#endif 178#ifdef CONFIG_EXACT_HWERR 179 /* Read the ILAT, and to check to see if the process we are 180 * single stepping caused a previous hardware error 181 * If so, do not single step, (which lowers to IRQ5, and makes 182 * us miss the error). 183 */ 184 p5.l = lo(ILAT); 185 p5.h = hi(ILAT); 186 r7 = [p5]; 187 cc = bittst(r7, EVT_IVHW_P); 188 if cc jump 1f; 189#endif 190 /* Single stepping only a single instruction, so clear the trace 191 * bit here. */ 192 r7 = syscfg; 193 bitclr (r7, SYSCFG_SSSTEP_P); 194 syscfg = R7; 195 jump _ex_trap_c; 196 1971: 198 /* 199 * We were in an interrupt handler. By convention, all of them save 200 * SYSCFG with their first instruction, so by checking whether our 201 * RETX points at the entry point, we can determine whether to allow 202 * a single step, or whether to clear SYSCFG. 203 * 204 * First, find out the interrupt level and the event vector for it. 205 */ 206 p5.l = lo(EVT0); 207 p5.h = hi(EVT0); 208 p5 += -4; 2092: 210 r7 = rot r7 by -1; 211 p5 += 4; 212 if !cc jump 2b; 213 214 /* What we actually do is test for the _second_ instruction in the 215 * IRQ handler. That way, if there are insns following the restore 216 * of SYSCFG after leaving the handler, we will not turn off SYSCFG 217 * for them. */ 218 219 r7 = [p5]; 220 r7 += 2; 221 r6 = RETX; 222 cc = R7 == R6; 223 if !cc jump _bfin_return_from_exception; 224 225 r7 = syscfg; 226 bitclr (r7, SYSCFG_SSSTEP_P); /* Turn off single step */ 227 syscfg = R7; 228 229 /* Fall through to _bfin_return_from_exception. */ 230ENDPROC(_ex_single_step) 231 232ENTRY(_bfin_return_from_exception) 233#if ANOMALY_05000257 234 R7=LC0; 235 LC0=R7; 236 R7=LC1; 237 LC1=R7; 238#endif 239 240#ifdef CONFIG_DEBUG_DOUBLEFAULT 241 /* While we were processing the current exception, 242 * did we cause another, and double fault? 243 */ 244 r7 = SEQSTAT; /* reason code is in bit 5:0 */ 245 r6.l = lo(SEQSTAT_EXCAUSE); 246 r6.h = hi(SEQSTAT_EXCAUSE); 247 r7 = r7 & r6; 248 r6 = VEC_UNCOV; 249 CC = R7 == R6; 250 if CC JUMP _double_fault; 251#endif 252 253 (R7:6,P5:4) = [sp++]; 254 ASTAT = [sp++]; 255 sp = EX_SCRATCH_REG; 256 rtx; 257ENDPROC(_bfin_return_from_exception) 258 259ENTRY(_handle_bad_cplb) 260 DEBUG_HWTRACE_RESTORE(p5, r7) 261 /* To get here, we just tried and failed to change a CPLB 262 * so, handle things in trap_c (C code), by lowering to 263 * IRQ5, just like we normally do. Since this is not a 264 * "normal" return path, we have a do a lot of stuff to 265 * the stack to get ready so, we can fall through - we 266 * need to make a CPLB exception look like a normal exception 267 */ 268 RESTORE_CONTEXT_CPLB 269 /* ASTAT is still on the stack, where it is needed. */ 270 [--sp] = (R7:6,P5:4); 271 272ENTRY(_ex_replaceable) 273 nop; 274 275ENTRY(_ex_trap_c) 276 /* The only thing that has been saved in this context is 277 * (R7:6,P5:4), ASTAT & SP - don't use anything else 278 */ 279 280 GET_PDA(p5, r6); 281 282 /* Make sure we are not in a double fault */ 283 p4.l = lo(IPEND); 284 p4.h = hi(IPEND); 285 r7 = [p4]; 286 CC = BITTST (r7, 5); 287 if CC jump _double_fault; 288 [p5 + PDA_EXIPEND] = r7; 289 290 /* Call C code (trap_c) to handle the exception, which most 291 * likely involves sending a signal to the current process. 292 * To avoid double faults, lower our priority to IRQ5 first. 293 */ 294 r7.h = _exception_to_level5; 295 r7.l = _exception_to_level5; 296 p4.l = lo(EVT5); 297 p4.h = hi(EVT5); 298 [p4] = r7; 299 csync; 300 301 /* 302 * Save these registers, as they are only valid in exception context 303 * (where we are now - as soon as we defer to IRQ5, they can change) 304 * DCPLB_STATUS and ICPLB_STATUS are also only valid in EVT3, 305 * but they are not very interesting, so don't save them 306 */ 307 308 p4.l = lo(DCPLB_FAULT_ADDR); 309 p4.h = hi(DCPLB_FAULT_ADDR); 310 r7 = [p4]; 311 [p5 + PDA_DCPLB] = r7; 312 313 p4.l = lo(ICPLB_FAULT_ADDR); 314 p4.h = hi(ICPLB_FAULT_ADDR); 315 r6 = [p4]; 316 [p5 + PDA_ICPLB] = r6; 317 318 r6 = retx; 319 [p5 + PDA_RETX] = r6; 320 321 r6 = SEQSTAT; 322 [p5 + PDA_SEQSTAT] = r6; 323 324 /* Save the state of single stepping */ 325 r6 = SYSCFG; 326 [p5 + PDA_SYSCFG] = r6; 327 /* Clear it while we handle the exception in IRQ5 mode */ 328 BITCLR(r6, SYSCFG_SSSTEP_P); 329 SYSCFG = r6; 330 331 /* Save the current IMASK, since we change in order to jump to level 5 */ 332 cli r6; 333 [p5 + PDA_EXIMASK] = r6; 334 335 p4.l = lo(SAFE_USER_INSTRUCTION); 336 p4.h = hi(SAFE_USER_INSTRUCTION); 337 retx = p4; 338 339 /* Disable all interrupts, but make sure level 5 is enabled so 340 * we can switch to that level. 341 */ 342 r6 = 0x3f; 343 sti r6; 344 345 /* In case interrupts are disabled IPEND[4] (global interrupt disable bit) 346 * clear it (re-enabling interrupts again) by the special sequence of pushing 347 * RETI onto the stack. This way we can lower ourselves to IVG5 even if the 348 * exception was taken after the interrupt handler was called but before it 349 * got a chance to enable global interrupts itself. 350 */ 351 [--sp] = reti; 352 sp += 4; 353 354 raise 5; 355 jump.s _bfin_return_from_exception; 356ENDPROC(_ex_trap_c) 357 358/* We just realized we got an exception, while we were processing a different 359 * exception. This is a unrecoverable event, so crash. 360 * Note: this cannot be ENTRY() as we jump here with "if cc jump" ... 361 */ 362ENTRY(_double_fault) 363 /* Turn caches & protection off, to ensure we don't get any more 364 * double exceptions 365 */ 366 367 P4.L = LO(IMEM_CONTROL); 368 P4.H = HI(IMEM_CONTROL); 369 370 R5 = [P4]; /* Control Register*/ 371 BITCLR(R5,ENICPLB_P); 372 CSYNC; /* Disabling of CPLBs should be proceeded by a CSYNC */ 373 [P4] = R5; 374 SSYNC; 375 376 P4.L = LO(DMEM_CONTROL); 377 P4.H = HI(DMEM_CONTROL); 378 R5 = [P4]; 379 BITCLR(R5,ENDCPLB_P); 380 CSYNC; /* Disabling of CPLBs should be proceeded by a CSYNC */ 381 [P4] = R5; 382 SSYNC; 383 384 /* Fix up the stack */ 385 (R7:6,P5:4) = [sp++]; 386 ASTAT = [sp++]; 387 SP = EX_SCRATCH_REG; 388 389 /* We should be out of the exception stack, and back down into 390 * kernel or user space stack 391 */ 392 SAVE_ALL_SYS 393 394 /* The dumping functions expect the return address in the RETI 395 * slot. */ 396 r6 = retx; 397 [sp + PT_PC] = r6; 398 399 r0 = sp; /* stack frame pt_regs pointer argument ==> r0 */ 400 SP += -12; 401 pseudo_long_call _double_fault_c, p5; 402 SP += 12; 403.L_double_fault_panic: 404 JUMP .L_double_fault_panic 405 406ENDPROC(_double_fault) 407 408ENTRY(_exception_to_level5) 409 SAVE_ALL_SYS 410 411 GET_PDA(p5, r7); /* Fetch current PDA */ 412 r6 = [p5 + PDA_RETX]; 413 [sp + PT_PC] = r6; 414 415 r6 = [p5 + PDA_SYSCFG]; 416 [sp + PT_SYSCFG] = r6; 417 418 r6 = [p5 + PDA_SEQSTAT]; /* Read back seqstat */ 419 [sp + PT_SEQSTAT] = r6; 420 421 /* Restore the hardware error vector. */ 422 r7.h = _evt_ivhw; 423 r7.l = _evt_ivhw; 424 p4.l = lo(EVT5); 425 p4.h = hi(EVT5); 426 [p4] = r7; 427 csync; 428 429#ifdef CONFIG_DEBUG_DOUBLEFAULT 430 /* Now that we have the hardware error vector programmed properly 431 * we can re-enable interrupts (IPEND[4]), so if the _trap_c causes 432 * another hardware error, we can catch it (self-nesting). 433 */ 434 [--sp] = reti; 435 sp += 4; 436#endif 437 438 r7 = [p5 + PDA_EXIPEND] /* Read the IPEND from the Exception state */ 439 [sp + PT_IPEND] = r7; /* Store IPEND onto the stack */ 440 441 r0 = sp; /* stack frame pt_regs pointer argument ==> r0 */ 442 SP += -12; 443 pseudo_long_call _trap_c, p4; 444 SP += 12; 445 446 /* If interrupts were off during the exception (IPEND[4] = 1), turn them off 447 * before we return. 448 */ 449 CC = BITTST(r7, EVT_IRPTEN_P) 450 if !CC jump 1f; 451 /* this will load a random value into the reti register - but that is OK, 452 * since we do restore it to the correct value in the 'RESTORE_ALL_SYS' macro 453 */ 454 sp += -4; 455 reti = [sp++]; 4561: 457 /* restore the interrupt mask (IMASK) */ 458 r6 = [p5 + PDA_EXIMASK]; 459 sti r6; 460 461 call _ret_from_exception; 462 RESTORE_ALL_SYS 463 rti; 464ENDPROC(_exception_to_level5) 465 466ENTRY(_trap) /* Exception: 4th entry into system event table(supervisor mode)*/ 467 /* Since the kernel stack can be anywhere, it's not guaranteed to be 468 * covered by a CPLB. Switch to an exception stack; use RETN as a 469 * scratch register (for want of a better option). 470 */ 471 EX_SCRATCH_REG = sp; 472 GET_PDA_SAFE(sp); 473 sp = [sp + PDA_EXSTACK]; 474 /* Try to deal with syscalls quickly. */ 475 [--sp] = ASTAT; 476 [--sp] = (R7:6,P5:4); 477 478 ANOMALY_283_315_WORKAROUND(p5, r7) 479 480#ifdef CONFIG_EXACT_HWERR 481 /* Make sure all pending read/writes complete. This will ensure any 482 * accesses which could cause hardware errors completes, and signal 483 * the the hardware before we do something silly, like crash the 484 * kernel. We don't need to work around anomaly 05000312, since 485 * we are already atomic 486 */ 487 ssync; 488#endif 489 490#ifdef CONFIG_DEBUG_DOUBLEFAULT 491 /* 492 * Save these registers, as they are only valid in exception context 493 * (where we are now - as soon as we defer to IRQ5, they can change) 494 * DCPLB_STATUS and ICPLB_STATUS are also only valid in EVT3, 495 * but they are not very interesting, so don't save them 496 */ 497 498 GET_PDA(p5, r7); 499 p4.l = lo(DCPLB_FAULT_ADDR); 500 p4.h = hi(DCPLB_FAULT_ADDR); 501 r7 = [p4]; 502 [p5 + PDA_DF_DCPLB] = r7; 503 504 p4.l = lo(ICPLB_FAULT_ADDR); 505 p4.h = hi(ICPLB_FAULT_ADDR); 506 r7 = [p4]; 507 [p5 + PDA_DF_ICPLB] = r7; 508 509 r7 = retx; 510 [p5 + PDA_DF_RETX] = r7; 511 512 r7 = SEQSTAT; /* reason code is in bit 5:0 */ 513 [p5 + PDA_DF_SEQSTAT] = r7; 514#else 515 r7 = SEQSTAT; /* reason code is in bit 5:0 */ 516#endif 517 r6.l = lo(SEQSTAT_EXCAUSE); 518 r6.h = hi(SEQSTAT_EXCAUSE); 519 r7 = r7 & r6; 520 p5.h = _ex_table; 521 p5.l = _ex_table; 522 p4 = r7; 523 p5 = p5 + (p4 << 2); 524 p4 = [p5]; 525 jump (p4); 526 527.Lbadsys: 528 r7 = -ENOSYS; /* signextending enough */ 529 [sp + PT_R0] = r7; /* return value from system call */ 530 jump .Lsyscall_really_exit; 531ENDPROC(_trap) 532 533ENTRY(_system_call) 534 /* Store IPEND */ 535 p2.l = lo(IPEND); 536 p2.h = hi(IPEND); 537 csync; 538 r0 = [p2]; 539 [sp + PT_IPEND] = r0; 540 541 /* Store RETS for now */ 542 r0 = rets; 543 [sp + PT_RESERVED] = r0; 544 /* Set the stack for the current process */ 545 r7 = sp; 546 r6.l = lo(ALIGN_PAGE_MASK); 547 r6.h = hi(ALIGN_PAGE_MASK); 548 r7 = r7 & r6; /* thread_info */ 549 p2 = r7; 550 p2 = [p2]; 551 552 [p2+(TASK_THREAD+THREAD_KSP)] = sp; 553#ifdef CONFIG_IPIPE 554 r0 = sp; 555 SP += -12; 556 pseudo_long_call ___ipipe_syscall_root, p0; 557 SP += 12; 558 cc = r0 == 1; 559 if cc jump .Lsyscall_really_exit; 560 cc = r0 == -1; 561 if cc jump .Lresume_userspace; 562 r3 = [sp + PT_R3]; 563 r4 = [sp + PT_R4]; 564 p0 = [sp + PT_ORIG_P0]; 565#endif /* CONFIG_IPIPE */ 566 567 /* are we tracing syscalls?*/ 568 r7 = sp; 569 r6.l = lo(ALIGN_PAGE_MASK); 570 r6.h = hi(ALIGN_PAGE_MASK); 571 r7 = r7 & r6; 572 p2 = r7; 573 r7 = [p2+TI_FLAGS]; 574 CC = BITTST(r7,TIF_SYSCALL_TRACE); 575 if CC JUMP _sys_trace; 576 CC = BITTST(r7,TIF_SINGLESTEP); 577 if CC JUMP _sys_trace; 578 579 /* Make sure the system call # is valid */ 580 p4 = __NR_syscall; 581 /* System call number is passed in P0 */ 582 cc = p4 <= p0; 583 if cc jump .Lbadsys; 584 585 /* Execute the appropriate system call */ 586 587 p4 = p0; 588 p5.l = _sys_call_table; 589 p5.h = _sys_call_table; 590 p5 = p5 + (p4 << 2); 591 r0 = [sp + PT_R0]; 592 r1 = [sp + PT_R1]; 593 r2 = [sp + PT_R2]; 594 p5 = [p5]; 595 596 [--sp] = r5; 597 [--sp] = r4; 598 [--sp] = r3; 599 SP += -12; 600 call (p5); 601 SP += 24; 602 [sp + PT_R0] = r0; 603 604.Lresume_userspace: 605 r7 = sp; 606 r4.l = lo(ALIGN_PAGE_MASK); 607 r4.h = hi(ALIGN_PAGE_MASK); 608 r7 = r7 & r4; /* thread_info->flags */ 609 p5 = r7; 610.Lresume_userspace_1: 611 /* Disable interrupts. */ 612 [--sp] = reti; 613 reti = [sp++]; 614 615 r7 = [p5 + TI_FLAGS]; 616 r4.l = lo(_TIF_WORK_MASK); 617 r4.h = hi(_TIF_WORK_MASK); 618 r7 = r7 & r4; 619 620.Lsyscall_resched: 621#ifdef CONFIG_IPIPE 622 cc = BITTST(r7, TIF_IRQ_SYNC); 623 if !cc jump .Lsyscall_no_irqsync; 624 /* 625 * Clear IPEND[4] manually to undo what resume_userspace_1 just did; 626 * we need this so that high priority domain interrupts may still 627 * preempt the current domain while the pipeline log is being played 628 * back. 629 */ 630 [--sp] = reti; 631 SP += 4; /* don't merge with next insn to keep the pattern obvious */ 632 SP += -12; 633 pseudo_long_call ___ipipe_sync_root, p4; 634 SP += 12; 635 jump .Lresume_userspace_1; 636.Lsyscall_no_irqsync: 637#endif 638 cc = BITTST(r7, TIF_NEED_RESCHED); 639 if !cc jump .Lsyscall_sigpending; 640 641 /* Reenable interrupts. */ 642 [--sp] = reti; 643 sp += 4; 644 645 SP += -12; 646 pseudo_long_call _schedule, p4; 647 SP += 12; 648 649 jump .Lresume_userspace_1; 650 651.Lsyscall_sigpending: 652 cc = BITTST(r7, TIF_SIGPENDING); 653 if cc jump .Lsyscall_do_signals; 654 cc = BITTST(r7, TIF_NOTIFY_RESUME); 655 if !cc jump .Lsyscall_really_exit; 656.Lsyscall_do_signals: 657 /* Reenable interrupts. */ 658 [--sp] = reti; 659 sp += 4; 660 661 r0 = sp; 662 SP += -12; 663 pseudo_long_call _do_notify_resume, p5; 664 SP += 12; 665 666.Lsyscall_really_exit: 667 r5 = [sp + PT_RESERVED]; 668 rets = r5; 669 rts; 670ENDPROC(_system_call) 671 672/* Do not mark as ENTRY() to avoid error in assembler ... 673 * this symbol need not be global anyways, so ... 674 */ 675_sys_trace: 676 r0 = sp; 677 pseudo_long_call _syscall_trace_enter, p5; 678 679 /* Make sure the system call # is valid */ 680 p4 = [SP + PT_P0]; 681 p3 = __NR_syscall; 682 cc = p3 <= p4; 683 r0 = -ENOSYS; 684 if cc jump .Lsys_trace_badsys; 685 686 /* Execute the appropriate system call */ 687 p5.l = _sys_call_table; 688 p5.h = _sys_call_table; 689 p5 = p5 + (p4 << 2); 690 r0 = [sp + PT_R0]; 691 r1 = [sp + PT_R1]; 692 r2 = [sp + PT_R2]; 693 r3 = [sp + PT_R3]; 694 r4 = [sp + PT_R4]; 695 r5 = [sp + PT_R5]; 696 p5 = [p5]; 697 698 [--sp] = r5; 699 [--sp] = r4; 700 [--sp] = r3; 701 SP += -12; 702 call (p5); 703 SP += 24; 704.Lsys_trace_badsys: 705 [sp + PT_R0] = r0; 706 707 r0 = sp; 708 pseudo_long_call _syscall_trace_leave, p5; 709 jump .Lresume_userspace; 710ENDPROC(_sys_trace) 711 712ENTRY(_resume) 713 /* 714 * Beware - when entering resume, prev (the current task) is 715 * in r0, next (the new task) is in r1. 716 */ 717 p0 = r0; 718 p1 = r1; 719 [--sp] = rets; 720 [--sp] = fp; 721 [--sp] = (r7:4, p5:3); 722 723 /* save usp */ 724 p2 = usp; 725 [p0+(TASK_THREAD+THREAD_USP)] = p2; 726 727 /* save current kernel stack pointer */ 728 [p0+(TASK_THREAD+THREAD_KSP)] = sp; 729 730 /* save program counter */ 731 r1.l = _new_old_task; 732 r1.h = _new_old_task; 733 [p0+(TASK_THREAD+THREAD_PC)] = r1; 734 735 /* restore the kernel stack pointer */ 736 sp = [p1+(TASK_THREAD+THREAD_KSP)]; 737 738 /* restore user stack pointer */ 739 p0 = [p1+(TASK_THREAD+THREAD_USP)]; 740 usp = p0; 741 742 /* restore pc */ 743 p0 = [p1+(TASK_THREAD+THREAD_PC)]; 744 jump (p0); 745 746 /* 747 * Following code actually lands up in a new (old) task. 748 */ 749 750_new_old_task: 751 (r7:4, p5:3) = [sp++]; 752 fp = [sp++]; 753 rets = [sp++]; 754 755 /* 756 * When we come out of resume, r0 carries "old" task, because we are 757 * in "new" task. 758 */ 759 rts; 760ENDPROC(_resume) 761 762ENTRY(_ret_from_exception) 763#ifdef CONFIG_IPIPE 764 p2.l = _ipipe_percpu_domain; 765 p2.h = _ipipe_percpu_domain; 766 r0.l = _ipipe_root; 767 r0.h = _ipipe_root; 768 r2 = [p2]; 769 cc = r0 == r2; 770 if !cc jump 4f; /* not on behalf of the root domain, get out */ 771#endif /* CONFIG_IPIPE */ 772 p2.l = lo(IPEND); 773 p2.h = hi(IPEND); 774 775 csync; 776 r0 = [p2]; 777 [sp + PT_IPEND] = r0; 778 7791: 780 r2 = LO(~0x37) (Z); 781 r0 = r2 & r0; 782 cc = r0 == 0; 783 if !cc jump 4f; /* if not return to user mode, get out */ 784 785 /* Make sure any pending system call or deferred exception 786 * return in ILAT for this process to get executed, otherwise 787 * in case context switch happens, system call of 788 * first process (i.e in ILAT) will be carried 789 * forward to the switched process 790 */ 791 792 p2.l = lo(ILAT); 793 p2.h = hi(ILAT); 794 r0 = [p2]; 795 r1 = (EVT_IVG14 | EVT_IVG15) (z); 796 r0 = r0 & r1; 797 cc = r0 == 0; 798 if !cc jump 5f; 799 800 /* Set the stack for the current process */ 801 r7 = sp; 802 r4.l = lo(ALIGN_PAGE_MASK); 803 r4.h = hi(ALIGN_PAGE_MASK); 804 r7 = r7 & r4; /* thread_info->flags */ 805 p5 = r7; 806 r7 = [p5 + TI_FLAGS]; 807 r4.l = lo(_TIF_WORK_MASK); 808 r4.h = hi(_TIF_WORK_MASK); 809 r7 = r7 & r4; 810 cc = r7 == 0; 811 if cc jump 4f; 812 813 p0.l = lo(EVT15); 814 p0.h = hi(EVT15); 815 p1.l = _schedule_and_signal; 816 p1.h = _schedule_and_signal; 817 [p0] = p1; 818 csync; 819 raise 15; /* raise evt15 to do signal or reschedule */ 8204: 821 r0 = syscfg; 822 bitclr(r0, SYSCFG_SSSTEP_P); /* Turn off single step */ 823 syscfg = r0; 8245: 825 rts; 826ENDPROC(_ret_from_exception) 827 828#if defined(CONFIG_PREEMPT) 829 830ENTRY(_up_to_irq14) 831#if ANOMALY_05000281 || ANOMALY_05000461 832 r0.l = lo(SAFE_USER_INSTRUCTION); 833 r0.h = hi(SAFE_USER_INSTRUCTION); 834 reti = r0; 835#endif 836 837#ifdef CONFIG_DEBUG_HWERR 838 /* enable irq14 & hwerr interrupt, until we transition to _evt_evt14 */ 839 r0 = (EVT_IVG14 | EVT_IVHW | EVT_IRPTEN | EVT_EVX | EVT_NMI | EVT_RST | EVT_EMU); 840#else 841 /* Only enable irq14 interrupt, until we transition to _evt_evt14 */ 842 r0 = (EVT_IVG14 | EVT_IRPTEN | EVT_EVX | EVT_NMI | EVT_RST | EVT_EMU); 843#endif 844 sti r0; 845 846 p0.l = lo(EVT14); 847 p0.h = hi(EVT14); 848 p1.l = _evt_up_evt14; 849 p1.h = _evt_up_evt14; 850 [p0] = p1; 851 csync; 852 853 raise 14; 8541: 855 jump 1b; 856ENDPROC(_up_to_irq14) 857 858ENTRY(_evt_up_evt14) 859#ifdef CONFIG_DEBUG_HWERR 860 r0 = (EVT_IVHW | EVT_IRPTEN | EVT_EVX | EVT_NMI | EVT_RST | EVT_EMU); 861 sti r0; 862#else 863 cli r0; 864#endif 865#ifdef CONFIG_TRACE_IRQFLAGS 866 [--sp] = rets; 867 sp += -12; 868 call _trace_hardirqs_off; 869 sp += 12; 870 rets = [sp++]; 871#endif 872 [--sp] = RETI; 873 SP += 4; 874 875 /* restore normal evt14 */ 876 p0.l = lo(EVT14); 877 p0.h = hi(EVT14); 878 p1.l = _evt_evt14; 879 p1.h = _evt_evt14; 880 [p0] = p1; 881 csync; 882 883 rts; 884ENDPROC(_evt_up_evt14) 885 886#endif 887 888#ifdef CONFIG_IPIPE 889 890_resume_kernel_from_int: 891 r1 = LO(~0x8000) (Z); 892 r1 = r0 & r1; 893 r0 = 1; 894 r0 = r1 - r0; 895 r2 = r1 & r0; 896 cc = r2 == 0; 897 /* Sync the root stage only from the outer interrupt level. */ 898 if !cc jump .Lnosync; 899 r0.l = ___ipipe_sync_root; 900 r0.h = ___ipipe_sync_root; 901 [--sp] = reti; 902 [--sp] = rets; 903 [--sp] = ( r7:4, p5:3 ); 904 SP += -12; 905 call ___ipipe_call_irqtail 906 SP += 12; 907 ( r7:4, p5:3 ) = [sp++]; 908 rets = [sp++]; 909 reti = [sp++]; 910.Lnosync: 911 rts 912#elif defined(CONFIG_PREEMPT) 913 914_resume_kernel_from_int: 915 /* check preempt_count */ 916 r7 = sp; 917 r4.l = lo(ALIGN_PAGE_MASK); 918 r4.h = hi(ALIGN_PAGE_MASK); 919 r7 = r7 & r4; 920 p5 = r7; 921 r7 = [p5 + TI_PREEMPT]; 922 cc = r7 == 0x0; 923 if !cc jump .Lreturn_to_kernel; 924.Lneed_schedule: 925 r7 = [p5 + TI_FLAGS]; 926 r4.l = lo(_TIF_WORK_MASK); 927 r4.h = hi(_TIF_WORK_MASK); 928 r7 = r7 & r4; 929 cc = BITTST(r7, TIF_NEED_RESCHED); 930 if !cc jump .Lreturn_to_kernel; 931 /* 932 * let schedule done at level 15, otherwise sheduled process will run 933 * at high level and block low level interrupt 934 */ 935 r6 = reti; /* save reti */ 936 r5.l = .Lkernel_schedule; 937 r5.h = .Lkernel_schedule; 938 reti = r5; 939 rti; 940.Lkernel_schedule: 941 [--sp] = rets; 942 sp += -12; 943 pseudo_long_call _preempt_schedule_irq, p4; 944 sp += 12; 945 rets = [sp++]; 946 947 [--sp] = rets; 948 sp += -12; 949 /* up to irq14 so that reti after restore_all can return to irq15(kernel) */ 950 pseudo_long_call _up_to_irq14, p4; 951 sp += 12; 952 rets = [sp++]; 953 954 reti = r6; /* restore reti so that origin process can return to interrupted point */ 955 956 jump .Lneed_schedule; 957#else 958 959#define _resume_kernel_from_int .Lreturn_to_kernel 960#endif 961 962ENTRY(_return_from_int) 963 /* If someone else already raised IRQ 15, do nothing. */ 964 csync; 965 p2.l = lo(ILAT); 966 p2.h = hi(ILAT); 967 r0 = [p2]; 968 cc = bittst (r0, EVT_IVG15_P); 969 if cc jump .Lreturn_to_kernel; 970 971 /* if not return to user mode, get out */ 972 p2.l = lo(IPEND); 973 p2.h = hi(IPEND); 974 r0 = [p2]; 975 r1 = 0x17(Z); 976 r2 = ~r1; 977 r2.h = 0; 978 r0 = r2 & r0; 979 r1 = 1; 980 r1 = r0 - r1; 981 r2 = r0 & r1; 982 cc = r2 == 0; 983 if !cc jump _resume_kernel_from_int; 984 985 /* Lower the interrupt level to 15. */ 986 p0.l = lo(EVT15); 987 p0.h = hi(EVT15); 988 p1.l = _schedule_and_signal_from_int; 989 p1.h = _schedule_and_signal_from_int; 990 [p0] = p1; 991 csync; 992#if ANOMALY_05000281 || ANOMALY_05000461 993 r0.l = lo(SAFE_USER_INSTRUCTION); 994 r0.h = hi(SAFE_USER_INSTRUCTION); 995 reti = r0; 996#endif 997 r0 = 0x801f (z); 998 STI r0; 999 raise 15; /* raise evt15 to do signal or reschedule */ 1000 rti; 1001.Lreturn_to_kernel: 1002 rts; 1003ENDPROC(_return_from_int) 1004 1005ENTRY(_lower_to_irq14) 1006#if ANOMALY_05000281 || ANOMALY_05000461 1007 r0.l = lo(SAFE_USER_INSTRUCTION); 1008 r0.h = hi(SAFE_USER_INSTRUCTION); 1009 reti = r0; 1010#endif 1011 1012#ifdef CONFIG_DEBUG_HWERR 1013 /* enable irq14 & hwerr interrupt, until we transition to _evt_evt14 */ 1014 r0 = (EVT_IVG14 | EVT_IVHW | EVT_IRPTEN | EVT_EVX | EVT_NMI | EVT_RST | EVT_EMU); 1015#else 1016 /* Only enable irq14 interrupt, until we transition to _evt_evt14 */ 1017 r0 = (EVT_IVG14 | EVT_IRPTEN | EVT_EVX | EVT_NMI | EVT_RST | EVT_EMU); 1018#endif 1019 sti r0; 1020 raise 14; 1021 rti; 1022ENDPROC(_lower_to_irq14) 1023 1024ENTRY(_evt_evt14) 1025#ifdef CONFIG_DEBUG_HWERR 1026 r0 = (EVT_IVHW | EVT_IRPTEN | EVT_EVX | EVT_NMI | EVT_RST | EVT_EMU); 1027 sti r0; 1028#else 1029 cli r0; 1030#endif 1031#ifdef CONFIG_TRACE_IRQFLAGS 1032 [--sp] = rets; 1033 sp += -12; 1034 call _trace_hardirqs_off; 1035 sp += 12; 1036 rets = [sp++]; 1037#endif 1038 [--sp] = RETI; 1039 SP += 4; 1040 rts; 1041ENDPROC(_evt_evt14) 1042 1043ENTRY(_schedule_and_signal_from_int) 1044 /* To end up here, vector 15 was changed - so we have to change it 1045 * back. 1046 */ 1047 p0.l = lo(EVT15); 1048 p0.h = hi(EVT15); 1049 p1.l = _evt_system_call; 1050 p1.h = _evt_system_call; 1051 [p0] = p1; 1052 csync; 1053 1054 /* Set orig_p0 to -1 to indicate this isn't the end of a syscall. */ 1055 r0 = -1 (x); 1056 [sp + PT_ORIG_P0] = r0; 1057 1058 p1 = rets; 1059 [sp + PT_RESERVED] = p1; 1060 1061#ifdef CONFIG_TRACE_IRQFLAGS 1062 /* trace_hardirqs_on() checks if all irqs are disabled. But here IRQ 15 1063 * is turned on, so disable all irqs. */ 1064 cli r0; 1065 sp += -12; 1066 call _trace_hardirqs_on; 1067 sp += 12; 1068#endif 1069#ifdef CONFIG_SMP 1070 GET_PDA(p0, r0); /* Fetch current PDA (can't migrate to other CPU here) */ 1071 r0 = [p0 + PDA_IRQFLAGS]; 1072#else 1073 p0.l = _bfin_irq_flags; 1074 p0.h = _bfin_irq_flags; 1075 r0 = [p0]; 1076#endif 1077 sti r0; 1078 1079 /* finish the userspace "atomic" functions for it */ 1080 r1.l = lo(FIXED_CODE_END); 1081 r1.h = hi(FIXED_CODE_END); 1082 r2 = [sp + PT_PC]; 1083 cc = r1 <= r2; 1084 if cc jump .Lresume_userspace (bp); 1085 1086 r0 = sp; 1087 sp += -12; 1088 1089 pseudo_long_call _finish_atomic_sections, p5; 1090 sp += 12; 1091 jump.s .Lresume_userspace; 1092ENDPROC(_schedule_and_signal_from_int) 1093 1094ENTRY(_schedule_and_signal) 1095 SAVE_CONTEXT_SYSCALL 1096 /* To end up here, vector 15 was changed - so we have to change it 1097 * back. 1098 */ 1099 p0.l = lo(EVT15); 1100 p0.h = hi(EVT15); 1101 p1.l = _evt_system_call; 1102 p1.h = _evt_system_call; 1103 [p0] = p1; 1104 csync; 1105 p0.l = 1f; 1106 p0.h = 1f; 1107 [sp + PT_RESERVED] = P0; 1108 call .Lresume_userspace; 11091: 1110 RESTORE_CONTEXT 1111 rti; 1112ENDPROC(_schedule_and_signal) 1113 1114/* We handle this 100% in exception space - to reduce overhead 1115 * Only potiential problem is if the software buffer gets swapped out of the 1116 * CPLB table - then double fault. - so we don't let this happen in other places 1117 */ 1118#ifdef CONFIG_DEBUG_BFIN_HWTRACE_EXPAND 1119ENTRY(_ex_trace_buff_full) 1120 [--sp] = P3; 1121 [--sp] = P2; 1122 [--sp] = LC0; 1123 [--sp] = LT0; 1124 [--sp] = LB0; 1125 P5.L = _trace_buff_offset; 1126 P5.H = _trace_buff_offset; 1127 P3 = [P5]; /* trace_buff_offset */ 1128 P5.L = lo(TBUFSTAT); 1129 P5.H = hi(TBUFSTAT); 1130 R7 = [P5]; 1131 R7 <<= 1; /* double, since we need to read twice */ 1132 LC0 = R7; 1133 R7 <<= 2; /* need to shift over again, 1134 * to get the number of bytes */ 1135 P5.L = lo(TBUF); 1136 P5.H = hi(TBUF); 1137 R6 = ((1 << CONFIG_DEBUG_BFIN_HWTRACE_EXPAND_LEN)*1024) - 1; 1138 1139 P2 = R7; 1140 P3 = P3 + P2; 1141 R7 = P3; 1142 R7 = R7 & R6; 1143 P3 = R7; 1144 P2.L = _trace_buff_offset; 1145 P2.H = _trace_buff_offset; 1146 [P2] = P3; 1147 1148 P2.L = _software_trace_buff; 1149 P2.H = _software_trace_buff; 1150 1151 LSETUP (.Lstart, .Lend) LC0; 1152.Lstart: 1153 R7 = [P5]; /* read TBUF */ 1154 P4 = P3 + P2; 1155 [P4] = R7; 1156 P3 += -4; 1157 R7 = P3; 1158 R7 = R7 & R6; 1159.Lend: 1160 P3 = R7; 1161 1162 LB0 = [sp++]; 1163 LT0 = [sp++]; 1164 LC0 = [sp++]; 1165 P2 = [sp++]; 1166 P3 = [sp++]; 1167 jump _bfin_return_from_exception; 1168ENDPROC(_ex_trace_buff_full) 1169 1170#if CONFIG_DEBUG_BFIN_HWTRACE_EXPAND_LEN == 4 1171.data 1172#else 1173.section .l1.data.B 1174#endif /* CONFIG_DEBUG_BFIN_HWTRACE_EXPAND_LEN */ 1175ENTRY(_trace_buff_offset) 1176 .long 0; 1177ALIGN 1178ENTRY(_software_trace_buff) 1179 .rept ((1 << CONFIG_DEBUG_BFIN_HWTRACE_EXPAND_LEN)*256); 1180 .long 0 1181 .endr 1182#endif /* CONFIG_DEBUG_BFIN_HWTRACE_EXPAND */ 1183 1184#ifdef CONFIG_EARLY_PRINTK 1185__INIT 1186ENTRY(_early_trap) 1187 SAVE_ALL_SYS 1188 trace_buffer_stop(p0,r0); 1189 1190 ANOMALY_283_315_WORKAROUND(p4, r5) 1191 1192 /* Turn caches off, to ensure we don't get double exceptions */ 1193 1194 P4.L = LO(IMEM_CONTROL); 1195 P4.H = HI(IMEM_CONTROL); 1196 1197 R5 = [P4]; /* Control Register*/ 1198 BITCLR(R5,ENICPLB_P); 1199 CSYNC; /* Disabling of CPLBs should be proceeded by a CSYNC */ 1200 [P4] = R5; 1201 SSYNC; 1202 1203 P4.L = LO(DMEM_CONTROL); 1204 P4.H = HI(DMEM_CONTROL); 1205 R5 = [P4]; 1206 BITCLR(R5,ENDCPLB_P); 1207 CSYNC; /* Disabling of CPLBs should be proceeded by a CSYNC */ 1208 [P4] = R5; 1209 SSYNC; 1210 1211 r0 = sp; /* stack frame pt_regs pointer argument ==> r0 */ 1212 r1 = RETX; 1213 1214 SP += -12; 1215 call _early_trap_c; 1216 SP += 12; 1217ENDPROC(_early_trap) 1218__FINIT 1219#endif /* CONFIG_EARLY_PRINTK */ 1220 1221/* 1222 * Put these in the kernel data section - that should always be covered by 1223 * a CPLB. This is needed to ensure we don't get double fault conditions 1224 */ 1225 1226#ifdef CONFIG_SYSCALL_TAB_L1 1227.section .l1.data 1228#else 1229.data 1230#endif 1231 1232ENTRY(_ex_table) 1233 /* entry for each EXCAUSE[5:0] 1234 * This table must be in sync with the table in ./kernel/traps.c 1235 * EXCPT instruction can provide 4 bits of EXCAUSE, allowing 16 to be user defined 1236 */ 1237 .long _ex_syscall /* 0x00 - User Defined - Linux Syscall */ 1238 .long _ex_trap_c /* 0x01 - User Defined - Software breakpoint */ 1239#ifdef CONFIG_KGDB 1240 .long _ex_trap_c /* 0x02 - User Defined - KGDB initial connection 1241 and break signal trap */ 1242#else 1243 .long _ex_replaceable /* 0x02 - User Defined */ 1244#endif 1245 .long _ex_trap_c /* 0x03 - User Defined - userspace stack overflow */ 1246 .long _ex_trap_c /* 0x04 - User Defined - dump trace buffer */ 1247 .long _ex_replaceable /* 0x05 - User Defined */ 1248 .long _ex_replaceable /* 0x06 - User Defined */ 1249 .long _ex_replaceable /* 0x07 - User Defined */ 1250 .long _ex_replaceable /* 0x08 - User Defined */ 1251 .long _ex_replaceable /* 0x09 - User Defined */ 1252 .long _ex_replaceable /* 0x0A - User Defined */ 1253 .long _ex_replaceable /* 0x0B - User Defined */ 1254 .long _ex_replaceable /* 0x0C - User Defined */ 1255 .long _ex_replaceable /* 0x0D - User Defined */ 1256 .long _ex_replaceable /* 0x0E - User Defined */ 1257 .long _ex_replaceable /* 0x0F - User Defined */ 1258 .long _ex_single_step /* 0x10 - HW Single step */ 1259#ifdef CONFIG_DEBUG_BFIN_HWTRACE_EXPAND 1260 .long _ex_trace_buff_full /* 0x11 - Trace Buffer Full */ 1261#else 1262 .long _ex_trap_c /* 0x11 - Trace Buffer Full */ 1263#endif 1264 .long _ex_trap_c /* 0x12 - Reserved */ 1265 .long _ex_trap_c /* 0x13 - Reserved */ 1266 .long _ex_trap_c /* 0x14 - Reserved */ 1267 .long _ex_trap_c /* 0x15 - Reserved */ 1268 .long _ex_trap_c /* 0x16 - Reserved */ 1269 .long _ex_trap_c /* 0x17 - Reserved */ 1270 .long _ex_trap_c /* 0x18 - Reserved */ 1271 .long _ex_trap_c /* 0x19 - Reserved */ 1272 .long _ex_trap_c /* 0x1A - Reserved */ 1273 .long _ex_trap_c /* 0x1B - Reserved */ 1274 .long _ex_trap_c /* 0x1C - Reserved */ 1275 .long _ex_trap_c /* 0x1D - Reserved */ 1276 .long _ex_trap_c /* 0x1E - Reserved */ 1277 .long _ex_trap_c /* 0x1F - Reserved */ 1278 .long _ex_trap_c /* 0x20 - Reserved */ 1279 .long _ex_trap_c /* 0x21 - Undefined Instruction */ 1280 .long _ex_trap_c /* 0x22 - Illegal Instruction Combination */ 1281 .long _ex_dviol /* 0x23 - Data CPLB Protection Violation */ 1282 .long _ex_trap_c /* 0x24 - Data access misaligned */ 1283 .long _ex_trap_c /* 0x25 - Unrecoverable Event */ 1284 .long _ex_dmiss /* 0x26 - Data CPLB Miss */ 1285 .long _ex_dmult /* 0x27 - Data CPLB Multiple Hits - Linux Trap Zero */ 1286 .long _ex_trap_c /* 0x28 - Emulation Watchpoint */ 1287 .long _ex_trap_c /* 0x29 - Instruction fetch access error (535 only) */ 1288 .long _ex_trap_c /* 0x2A - Instruction fetch misaligned */ 1289 .long _ex_trap_c /* 0x2B - Instruction CPLB protection Violation */ 1290 .long _ex_icplb_miss /* 0x2C - Instruction CPLB miss */ 1291 .long _ex_trap_c /* 0x2D - Instruction CPLB Multiple Hits */ 1292 .long _ex_trap_c /* 0x2E - Illegal use of Supervisor Resource */ 1293 .long _ex_trap_c /* 0x2E - Illegal use of Supervisor Resource */ 1294 .long _ex_trap_c /* 0x2F - Reserved */ 1295 .long _ex_trap_c /* 0x30 - Reserved */ 1296 .long _ex_trap_c /* 0x31 - Reserved */ 1297 .long _ex_trap_c /* 0x32 - Reserved */ 1298 .long _ex_trap_c /* 0x33 - Reserved */ 1299 .long _ex_trap_c /* 0x34 - Reserved */ 1300 .long _ex_trap_c /* 0x35 - Reserved */ 1301 .long _ex_trap_c /* 0x36 - Reserved */ 1302 .long _ex_trap_c /* 0x37 - Reserved */ 1303 .long _ex_trap_c /* 0x38 - Reserved */ 1304 .long _ex_trap_c /* 0x39 - Reserved */ 1305 .long _ex_trap_c /* 0x3A - Reserved */ 1306 .long _ex_trap_c /* 0x3B - Reserved */ 1307 .long _ex_trap_c /* 0x3C - Reserved */ 1308 .long _ex_trap_c /* 0x3D - Reserved */ 1309 .long _ex_trap_c /* 0x3E - Reserved */ 1310 .long _ex_trap_c /* 0x3F - Reserved */ 1311END(_ex_table) 1312 1313ENTRY(_sys_call_table) 1314 .long _sys_restart_syscall /* 0 */ 1315 .long _sys_exit 1316 .long _sys_ni_syscall /* fork */ 1317 .long _sys_read 1318 .long _sys_write 1319 .long _sys_open /* 5 */ 1320 .long _sys_close 1321 .long _sys_ni_syscall /* old waitpid */ 1322 .long _sys_creat 1323 .long _sys_link 1324 .long _sys_unlink /* 10 */ 1325 .long _sys_execve 1326 .long _sys_chdir 1327 .long _sys_time 1328 .long _sys_mknod 1329 .long _sys_chmod /* 15 */ 1330 .long _sys_chown /* chown16 */ 1331 .long _sys_ni_syscall /* old break syscall holder */ 1332 .long _sys_ni_syscall /* old stat */ 1333 .long _sys_lseek 1334 .long _sys_getpid /* 20 */ 1335 .long _sys_mount 1336 .long _sys_ni_syscall /* old umount */ 1337 .long _sys_setuid 1338 .long _sys_getuid 1339 .long _sys_stime /* 25 */ 1340 .long _sys_ptrace 1341 .long _sys_alarm 1342 .long _sys_ni_syscall /* old fstat */ 1343 .long _sys_pause 1344 .long _sys_ni_syscall /* old utime */ /* 30 */ 1345 .long _sys_ni_syscall /* old stty syscall holder */ 1346 .long _sys_ni_syscall /* old gtty syscall holder */ 1347 .long _sys_access 1348 .long _sys_nice 1349 .long _sys_ni_syscall /* 35 */ /* old ftime syscall holder */ 1350 .long _sys_sync 1351 .long _sys_kill 1352 .long _sys_rename 1353 .long _sys_mkdir 1354 .long _sys_rmdir /* 40 */ 1355 .long _sys_dup 1356 .long _sys_pipe 1357 .long _sys_times 1358 .long _sys_ni_syscall /* old prof syscall holder */ 1359 .long _sys_brk /* 45 */ 1360 .long _sys_setgid 1361 .long _sys_getgid 1362 .long _sys_ni_syscall /* old sys_signal */ 1363 .long _sys_geteuid /* geteuid16 */ 1364 .long _sys_getegid /* getegid16 */ /* 50 */ 1365 .long _sys_acct 1366 .long _sys_umount /* recycled never used phys() */ 1367 .long _sys_ni_syscall /* old lock syscall holder */ 1368 .long _sys_ioctl 1369 .long _sys_fcntl /* 55 */ 1370 .long _sys_ni_syscall /* old mpx syscall holder */ 1371 .long _sys_setpgid 1372 .long _sys_ni_syscall /* old ulimit syscall holder */ 1373 .long _sys_ni_syscall /* old old uname */ 1374 .long _sys_umask /* 60 */ 1375 .long _sys_chroot 1376 .long _sys_ustat 1377 .long _sys_dup2 1378 .long _sys_getppid 1379 .long _sys_getpgrp /* 65 */ 1380 .long _sys_setsid 1381 .long _sys_ni_syscall /* old sys_sigaction */ 1382 .long _sys_sgetmask 1383 .long _sys_ssetmask 1384 .long _sys_setreuid /* setreuid16 */ /* 70 */ 1385 .long _sys_setregid /* setregid16 */ 1386 .long _sys_ni_syscall /* old sys_sigsuspend */ 1387 .long _sys_ni_syscall /* old sys_sigpending */ 1388 .long _sys_sethostname 1389 .long _sys_setrlimit /* 75 */ 1390 .long _sys_ni_syscall /* old getrlimit */ 1391 .long _sys_getrusage 1392 .long _sys_gettimeofday 1393 .long _sys_settimeofday 1394 .long _sys_getgroups /* getgroups16 */ /* 80 */ 1395 .long _sys_setgroups /* setgroups16 */ 1396 .long _sys_ni_syscall /* old_select */ 1397 .long _sys_symlink 1398 .long _sys_ni_syscall /* old lstat */ 1399 .long _sys_readlink /* 85 */ 1400 .long _sys_uselib 1401 .long _sys_ni_syscall /* sys_swapon */ 1402 .long _sys_reboot 1403 .long _sys_ni_syscall /* old_readdir */ 1404 .long _sys_ni_syscall /* sys_mmap */ /* 90 */ 1405 .long _sys_munmap 1406 .long _sys_truncate 1407 .long _sys_ftruncate 1408 .long _sys_fchmod 1409 .long _sys_fchown /* fchown16 */ /* 95 */ 1410 .long _sys_getpriority 1411 .long _sys_setpriority 1412 .long _sys_ni_syscall /* old profil syscall holder */ 1413 .long _sys_statfs 1414 .long _sys_fstatfs /* 100 */ 1415 .long _sys_ni_syscall 1416 .long _sys_ni_syscall /* old sys_socketcall */ 1417 .long _sys_syslog 1418 .long _sys_setitimer 1419 .long _sys_getitimer /* 105 */ 1420 .long _sys_newstat 1421 .long _sys_newlstat 1422 .long _sys_newfstat 1423 .long _sys_ni_syscall /* old uname */ 1424 .long _sys_ni_syscall /* iopl for i386 */ /* 110 */ 1425 .long _sys_vhangup 1426 .long _sys_ni_syscall /* obsolete idle() syscall */ 1427 .long _sys_ni_syscall /* vm86old for i386 */ 1428 .long _sys_wait4 1429 .long _sys_ni_syscall /* 115 */ /* sys_swapoff */ 1430 .long _sys_sysinfo 1431 .long _sys_ni_syscall /* old sys_ipc */ 1432 .long _sys_fsync 1433 .long _sys_ni_syscall /* old sys_sigreturn */ 1434 .long _bfin_clone /* 120 */ 1435 .long _sys_setdomainname 1436 .long _sys_newuname 1437 .long _sys_ni_syscall /* old sys_modify_ldt */ 1438 .long _sys_adjtimex 1439 .long _sys_mprotect /* 125 */ 1440 .long _sys_ni_syscall /* old sys_sigprocmask */ 1441 .long _sys_ni_syscall /* old "creat_module" */ 1442 .long _sys_init_module 1443 .long _sys_delete_module 1444 .long _sys_ni_syscall /* 130: old "get_kernel_syms" */ 1445 .long _sys_quotactl 1446 .long _sys_getpgid 1447 .long _sys_fchdir 1448 .long _sys_bdflush 1449 .long _sys_ni_syscall /* 135 */ /* sys_sysfs */ 1450 .long _sys_personality 1451 .long _sys_ni_syscall /* for afs_syscall */ 1452 .long _sys_setfsuid /* setfsuid16 */ 1453 .long _sys_setfsgid /* setfsgid16 */ 1454 .long _sys_llseek /* 140 */ 1455 .long _sys_getdents 1456 .long _sys_ni_syscall /* sys_select */ 1457 .long _sys_flock 1458 .long _sys_msync 1459 .long _sys_readv /* 145 */ 1460 .long _sys_writev 1461 .long _sys_getsid 1462 .long _sys_fdatasync 1463 .long _sys_sysctl 1464 .long _sys_mlock /* 150 */ 1465 .long _sys_munlock 1466 .long _sys_mlockall 1467 .long _sys_munlockall 1468 .long _sys_sched_setparam 1469 .long _sys_sched_getparam /* 155 */ 1470 .long _sys_sched_setscheduler 1471 .long _sys_sched_getscheduler 1472 .long _sys_sched_yield 1473 .long _sys_sched_get_priority_max 1474 .long _sys_sched_get_priority_min /* 160 */ 1475 .long _sys_sched_rr_get_interval 1476 .long _sys_nanosleep 1477 .long _sys_mremap 1478 .long _sys_setresuid /* setresuid16 */ 1479 .long _sys_getresuid /* getresuid16 */ /* 165 */ 1480 .long _sys_ni_syscall /* for vm86 */ 1481 .long _sys_ni_syscall /* old "query_module" */ 1482 .long _sys_ni_syscall /* sys_poll */ 1483 .long _sys_ni_syscall /* old nfsservctl */ 1484 .long _sys_setresgid /* setresgid16 */ /* 170 */ 1485 .long _sys_getresgid /* getresgid16 */ 1486 .long _sys_prctl 1487 .long _sys_rt_sigreturn 1488 .long _sys_rt_sigaction 1489 .long _sys_rt_sigprocmask /* 175 */ 1490 .long _sys_rt_sigpending 1491 .long _sys_rt_sigtimedwait 1492 .long _sys_rt_sigqueueinfo 1493 .long _sys_rt_sigsuspend 1494 .long _sys_pread64 /* 180 */ 1495 .long _sys_pwrite64 1496 .long _sys_lchown /* lchown16 */ 1497 .long _sys_getcwd 1498 .long _sys_capget 1499 .long _sys_capset /* 185 */ 1500 .long _sys_sigaltstack 1501 .long _sys_sendfile 1502 .long _sys_ni_syscall /* streams1 */ 1503 .long _sys_ni_syscall /* streams2 */ 1504 .long _sys_vfork /* 190 */ 1505 .long _sys_getrlimit 1506 .long _sys_mmap_pgoff 1507 .long _sys_truncate64 1508 .long _sys_ftruncate64 1509 .long _sys_stat64 /* 195 */ 1510 .long _sys_lstat64 1511 .long _sys_fstat64 1512 .long _sys_chown 1513 .long _sys_getuid 1514 .long _sys_getgid /* 200 */ 1515 .long _sys_geteuid 1516 .long _sys_getegid 1517 .long _sys_setreuid 1518 .long _sys_setregid 1519 .long _sys_getgroups /* 205 */ 1520 .long _sys_setgroups 1521 .long _sys_fchown 1522 .long _sys_setresuid 1523 .long _sys_getresuid 1524 .long _sys_setresgid /* 210 */ 1525 .long _sys_getresgid 1526 .long _sys_lchown 1527 .long _sys_setuid 1528 .long _sys_setgid 1529 .long _sys_setfsuid /* 215 */ 1530 .long _sys_setfsgid 1531 .long _sys_pivot_root 1532 .long _sys_mincore 1533 .long _sys_madvise 1534 .long _sys_getdents64 /* 220 */ 1535 .long _sys_fcntl64 1536 .long _sys_ni_syscall /* reserved for TUX */ 1537 .long _sys_ni_syscall 1538 .long _sys_gettid 1539 .long _sys_readahead /* 225 */ 1540 .long _sys_setxattr 1541 .long _sys_lsetxattr 1542 .long _sys_fsetxattr 1543 .long _sys_getxattr 1544 .long _sys_lgetxattr /* 230 */ 1545 .long _sys_fgetxattr 1546 .long _sys_listxattr 1547 .long _sys_llistxattr 1548 .long _sys_flistxattr 1549 .long _sys_removexattr /* 235 */ 1550 .long _sys_lremovexattr 1551 .long _sys_fremovexattr 1552 .long _sys_tkill 1553 .long _sys_sendfile64 1554 .long _sys_futex /* 240 */ 1555 .long _sys_sched_setaffinity 1556 .long _sys_sched_getaffinity 1557 .long _sys_ni_syscall /* sys_set_thread_area */ 1558 .long _sys_ni_syscall /* sys_get_thread_area */ 1559 .long _sys_io_setup /* 245 */ 1560 .long _sys_io_destroy 1561 .long _sys_io_getevents 1562 .long _sys_io_submit 1563 .long _sys_io_cancel 1564 .long _sys_ni_syscall /* 250 */ /* sys_alloc_hugepages */ 1565 .long _sys_ni_syscall /* sys_freec_hugepages */ 1566 .long _sys_exit_group 1567 .long _sys_lookup_dcookie 1568 .long _sys_bfin_spinlock 1569 .long _sys_epoll_create /* 255 */ 1570 .long _sys_epoll_ctl 1571 .long _sys_epoll_wait 1572 .long _sys_ni_syscall /* remap_file_pages */ 1573 .long _sys_set_tid_address 1574 .long _sys_timer_create /* 260 */ 1575 .long _sys_timer_settime 1576 .long _sys_timer_gettime 1577 .long _sys_timer_getoverrun 1578 .long _sys_timer_delete 1579 .long _sys_clock_settime /* 265 */ 1580 .long _sys_clock_gettime 1581 .long _sys_clock_getres 1582 .long _sys_clock_nanosleep 1583 .long _sys_statfs64 1584 .long _sys_fstatfs64 /* 270 */ 1585 .long _sys_tgkill 1586 .long _sys_utimes 1587 .long _sys_fadvise64_64 1588 .long _sys_ni_syscall /* vserver */ 1589 .long _sys_mbind /* 275 */ 1590 .long _sys_ni_syscall /* get_mempolicy */ 1591 .long _sys_ni_syscall /* set_mempolicy */ 1592 .long _sys_mq_open 1593 .long _sys_mq_unlink 1594 .long _sys_mq_timedsend /* 280 */ 1595 .long _sys_mq_timedreceive 1596 .long _sys_mq_notify 1597 .long _sys_mq_getsetattr 1598 .long _sys_ni_syscall /* kexec_load */ 1599 .long _sys_waitid /* 285 */ 1600 .long _sys_add_key 1601 .long _sys_request_key 1602 .long _sys_keyctl 1603 .long _sys_ioprio_set 1604 .long _sys_ioprio_get /* 290 */ 1605 .long _sys_inotify_init 1606 .long _sys_inotify_add_watch 1607 .long _sys_inotify_rm_watch 1608 .long _sys_ni_syscall /* migrate_pages */ 1609 .long _sys_openat /* 295 */ 1610 .long _sys_mkdirat 1611 .long _sys_mknodat 1612 .long _sys_fchownat 1613 .long _sys_futimesat 1614 .long _sys_fstatat64 /* 300 */ 1615 .long _sys_unlinkat 1616 .long _sys_renameat 1617 .long _sys_linkat 1618 .long _sys_symlinkat 1619 .long _sys_readlinkat /* 305 */ 1620 .long _sys_fchmodat 1621 .long _sys_faccessat 1622 .long _sys_pselect6 1623 .long _sys_ppoll 1624 .long _sys_unshare /* 310 */ 1625 .long _sys_sram_alloc 1626 .long _sys_sram_free 1627 .long _sys_dma_memcpy 1628 .long _sys_accept 1629 .long _sys_bind /* 315 */ 1630 .long _sys_connect 1631 .long _sys_getpeername 1632 .long _sys_getsockname 1633 .long _sys_getsockopt 1634 .long _sys_listen /* 320 */ 1635 .long _sys_recv 1636 .long _sys_recvfrom 1637 .long _sys_recvmsg 1638 .long _sys_send 1639 .long _sys_sendmsg /* 325 */ 1640 .long _sys_sendto 1641 .long _sys_setsockopt 1642 .long _sys_shutdown 1643 .long _sys_socket 1644 .long _sys_socketpair /* 330 */ 1645 .long _sys_semctl 1646 .long _sys_semget 1647 .long _sys_semop 1648 .long _sys_msgctl 1649 .long _sys_msgget /* 335 */ 1650 .long _sys_msgrcv 1651 .long _sys_msgsnd 1652 .long _sys_shmat 1653 .long _sys_shmctl 1654 .long _sys_shmdt /* 340 */ 1655 .long _sys_shmget 1656 .long _sys_splice 1657 .long _sys_sync_file_range 1658 .long _sys_tee 1659 .long _sys_vmsplice /* 345 */ 1660 .long _sys_epoll_pwait 1661 .long _sys_utimensat 1662 .long _sys_signalfd 1663 .long _sys_timerfd_create 1664 .long _sys_eventfd /* 350 */ 1665 .long _sys_pread64 1666 .long _sys_pwrite64 1667 .long _sys_fadvise64 1668 .long _sys_set_robust_list 1669 .long _sys_get_robust_list /* 355 */ 1670 .long _sys_fallocate 1671 .long _sys_semtimedop 1672 .long _sys_timerfd_settime 1673 .long _sys_timerfd_gettime 1674 .long _sys_signalfd4 /* 360 */ 1675 .long _sys_eventfd2 1676 .long _sys_epoll_create1 1677 .long _sys_dup3 1678 .long _sys_pipe2 1679 .long _sys_inotify_init1 /* 365 */ 1680 .long _sys_preadv 1681 .long _sys_pwritev 1682 .long _sys_rt_tgsigqueueinfo 1683 .long _sys_perf_event_open 1684 .long _sys_recvmmsg /* 370 */ 1685 .long _sys_fanotify_init 1686 .long _sys_fanotify_mark 1687 .long _sys_prlimit64 1688 .long _sys_cacheflush 1689 .long _sys_name_to_handle_at /* 375 */ 1690 .long _sys_open_by_handle_at 1691 .long _sys_clock_adjtime 1692 .long _sys_syncfs 1693 .long _sys_setns 1694 .long _sys_sendmmsg /* 380 */ 1695 .long _sys_process_vm_readv 1696 .long _sys_process_vm_writev 1697 1698 .rept NR_syscalls-(.-_sys_call_table)/4 1699 .long _sys_ni_syscall 1700 .endr 1701END(_sys_call_table) 1702