github.com/AESNooper/go/src@v0.0.0-20220218095104-b56a4ab1bbbb/runtime/sys_linux_arm.s (about) 1 // Copyright 2009 The Go Authors. All rights reserved. 2 // Use of this source code is governed by a BSD-style 3 // license that can be found in the LICENSE file. 4 5 // 6 // System calls and other sys.stuff for arm, Linux 7 // 8 9 #include "go_asm.h" 10 #include "go_tls.h" 11 #include "textflag.h" 12 13 #define CLOCK_REALTIME 0 14 #define CLOCK_MONOTONIC 1 15 16 // for EABI, as we don't support OABI 17 #define SYS_BASE 0x0 18 19 #define SYS_exit (SYS_BASE + 1) 20 #define SYS_read (SYS_BASE + 3) 21 #define SYS_write (SYS_BASE + 4) 22 #define SYS_open (SYS_BASE + 5) 23 #define SYS_close (SYS_BASE + 6) 24 #define SYS_getpid (SYS_BASE + 20) 25 #define SYS_kill (SYS_BASE + 37) 26 #define SYS_pipe (SYS_BASE + 42) 27 #define SYS_clone (SYS_BASE + 120) 28 #define SYS_rt_sigreturn (SYS_BASE + 173) 29 #define SYS_rt_sigaction (SYS_BASE + 174) 30 #define SYS_rt_sigprocmask (SYS_BASE + 175) 31 #define SYS_sigaltstack (SYS_BASE + 186) 32 #define SYS_mmap2 (SYS_BASE + 192) 33 #define SYS_futex (SYS_BASE + 240) 34 #define SYS_exit_group (SYS_BASE + 248) 35 #define SYS_munmap (SYS_BASE + 91) 36 #define SYS_madvise (SYS_BASE + 220) 37 #define SYS_setitimer (SYS_BASE + 104) 38 #define SYS_mincore (SYS_BASE + 219) 39 #define SYS_gettid (SYS_BASE + 224) 40 #define SYS_tgkill (SYS_BASE + 268) 41 #define SYS_sched_yield (SYS_BASE + 158) 42 #define SYS_nanosleep (SYS_BASE + 162) 43 #define SYS_sched_getaffinity (SYS_BASE + 242) 44 #define SYS_clock_gettime (SYS_BASE + 263) 45 #define SYS_epoll_create (SYS_BASE + 250) 46 #define SYS_epoll_ctl (SYS_BASE + 251) 47 #define SYS_epoll_wait (SYS_BASE + 252) 48 #define SYS_timer_create (SYS_BASE + 257) 49 #define SYS_timer_settime (SYS_BASE + 258) 50 #define SYS_timer_delete (SYS_BASE + 261) 51 #define SYS_epoll_create1 (SYS_BASE + 357) 52 #define SYS_pipe2 (SYS_BASE + 359) 53 #define SYS_fcntl (SYS_BASE + 55) 54 #define SYS_access (SYS_BASE + 33) 55 #define SYS_connect (SYS_BASE + 283) 56 #define SYS_socket (SYS_BASE + 281) 57 #define SYS_brk (SYS_BASE + 45) 58 59 #define ARM_BASE (SYS_BASE + 0x0f0000) 60 61 TEXT runtime·open(SB),NOSPLIT,$0 62 MOVW name+0(FP), R0 63 MOVW mode+4(FP), R1 64 MOVW perm+8(FP), R2 65 MOVW $SYS_open, R7 66 SWI $0 67 MOVW $0xfffff001, R1 68 CMP R1, R0 69 MOVW.HI $-1, R0 70 MOVW R0, ret+12(FP) 71 RET 72 73 TEXT runtime·closefd(SB),NOSPLIT,$0 74 MOVW fd+0(FP), R0 75 MOVW $SYS_close, R7 76 SWI $0 77 MOVW $0xfffff001, R1 78 CMP R1, R0 79 MOVW.HI $-1, R0 80 MOVW R0, ret+4(FP) 81 RET 82 83 TEXT runtime·write1(SB),NOSPLIT,$0 84 MOVW fd+0(FP), R0 85 MOVW p+4(FP), R1 86 MOVW n+8(FP), R2 87 MOVW $SYS_write, R7 88 SWI $0 89 MOVW R0, ret+12(FP) 90 RET 91 92 TEXT runtime·read(SB),NOSPLIT,$0 93 MOVW fd+0(FP), R0 94 MOVW p+4(FP), R1 95 MOVW n+8(FP), R2 96 MOVW $SYS_read, R7 97 SWI $0 98 MOVW R0, ret+12(FP) 99 RET 100 101 // func pipe() (r, w int32, errno int32) 102 TEXT runtime·pipe(SB),NOSPLIT,$0-12 103 MOVW $r+0(FP), R0 104 MOVW $SYS_pipe, R7 105 SWI $0 106 MOVW R0, errno+8(FP) 107 RET 108 109 // func pipe2(flags int32) (r, w int32, errno int32) 110 TEXT runtime·pipe2(SB),NOSPLIT,$0-16 111 MOVW $r+4(FP), R0 112 MOVW flags+0(FP), R1 113 MOVW $SYS_pipe2, R7 114 SWI $0 115 MOVW R0, errno+12(FP) 116 RET 117 118 TEXT runtime·exit(SB),NOSPLIT|NOFRAME,$0 119 MOVW code+0(FP), R0 120 MOVW $SYS_exit_group, R7 121 SWI $0 122 MOVW $1234, R0 123 MOVW $1002, R1 124 MOVW R0, (R1) // fail hard 125 126 TEXT exit1<>(SB),NOSPLIT|NOFRAME,$0 127 MOVW code+0(FP), R0 128 MOVW $SYS_exit, R7 129 SWI $0 130 MOVW $1234, R0 131 MOVW $1003, R1 132 MOVW R0, (R1) // fail hard 133 134 // func exitThread(wait *uint32) 135 TEXT runtime·exitThread(SB),NOSPLIT|NOFRAME,$0-4 136 MOVW wait+0(FP), R0 137 // We're done using the stack. 138 // Alas, there's no reliable way to make this write atomic 139 // without potentially using the stack. So it goes. 140 MOVW $0, R1 141 MOVW R1, (R0) 142 MOVW $0, R0 // exit code 143 MOVW $SYS_exit, R7 144 SWI $0 145 MOVW $1234, R0 146 MOVW $1004, R1 147 MOVW R0, (R1) // fail hard 148 JMP 0(PC) 149 150 TEXT runtime·gettid(SB),NOSPLIT,$0-4 151 MOVW $SYS_gettid, R7 152 SWI $0 153 MOVW R0, ret+0(FP) 154 RET 155 156 TEXT runtime·raise(SB),NOSPLIT|NOFRAME,$0 157 MOVW $SYS_getpid, R7 158 SWI $0 159 MOVW R0, R4 160 MOVW $SYS_gettid, R7 161 SWI $0 162 MOVW R0, R1 // arg 2 tid 163 MOVW R4, R0 // arg 1 pid 164 MOVW sig+0(FP), R2 // arg 3 165 MOVW $SYS_tgkill, R7 166 SWI $0 167 RET 168 169 TEXT runtime·raiseproc(SB),NOSPLIT|NOFRAME,$0 170 MOVW $SYS_getpid, R7 171 SWI $0 172 // arg 1 tid already in R0 from getpid 173 MOVW sig+0(FP), R1 // arg 2 - signal 174 MOVW $SYS_kill, R7 175 SWI $0 176 RET 177 178 TEXT ·getpid(SB),NOSPLIT,$0-4 179 MOVW $SYS_getpid, R7 180 SWI $0 181 MOVW R0, ret+0(FP) 182 RET 183 184 TEXT ·tgkill(SB),NOSPLIT,$0-12 185 MOVW tgid+0(FP), R0 186 MOVW tid+4(FP), R1 187 MOVW sig+8(FP), R2 188 MOVW $SYS_tgkill, R7 189 SWI $0 190 RET 191 192 TEXT runtime·mmap(SB),NOSPLIT,$0 193 MOVW addr+0(FP), R0 194 MOVW n+4(FP), R1 195 MOVW prot+8(FP), R2 196 MOVW flags+12(FP), R3 197 MOVW fd+16(FP), R4 198 MOVW off+20(FP), R5 199 MOVW $SYS_mmap2, R7 200 SWI $0 201 MOVW $0xfffff001, R6 202 CMP R6, R0 203 MOVW $0, R1 204 RSB.HI $0, R0 205 MOVW.HI R0, R1 // if error, put in R1 206 MOVW.HI $0, R0 207 MOVW R0, p+24(FP) 208 MOVW R1, err+28(FP) 209 RET 210 211 TEXT runtime·munmap(SB),NOSPLIT,$0 212 MOVW addr+0(FP), R0 213 MOVW n+4(FP), R1 214 MOVW $SYS_munmap, R7 215 SWI $0 216 MOVW $0xfffff001, R6 217 CMP R6, R0 218 MOVW.HI $0, R8 // crash on syscall failure 219 MOVW.HI R8, (R8) 220 RET 221 222 TEXT runtime·madvise(SB),NOSPLIT,$0 223 MOVW addr+0(FP), R0 224 MOVW n+4(FP), R1 225 MOVW flags+8(FP), R2 226 MOVW $SYS_madvise, R7 227 SWI $0 228 MOVW R0, ret+12(FP) 229 RET 230 231 TEXT runtime·setitimer(SB),NOSPLIT,$0 232 MOVW mode+0(FP), R0 233 MOVW new+4(FP), R1 234 MOVW old+8(FP), R2 235 MOVW $SYS_setitimer, R7 236 SWI $0 237 RET 238 239 TEXT runtime·timer_create(SB),NOSPLIT,$0-16 240 MOVW clockid+0(FP), R0 241 MOVW sevp+4(FP), R1 242 MOVW timerid+8(FP), R2 243 MOVW $SYS_timer_create, R7 244 SWI $0 245 MOVW R0, ret+12(FP) 246 RET 247 248 TEXT runtime·timer_settime(SB),NOSPLIT,$0-20 249 MOVW timerid+0(FP), R0 250 MOVW flags+4(FP), R1 251 MOVW new+8(FP), R2 252 MOVW old+12(FP), R3 253 MOVW $SYS_timer_settime, R7 254 SWI $0 255 MOVW R0, ret+16(FP) 256 RET 257 258 TEXT runtime·timer_delete(SB),NOSPLIT,$0-8 259 MOVW timerid+0(FP), R0 260 MOVW $SYS_timer_delete, R7 261 SWI $0 262 MOVW R0, ret+4(FP) 263 RET 264 265 TEXT runtime·mincore(SB),NOSPLIT,$0 266 MOVW addr+0(FP), R0 267 MOVW n+4(FP), R1 268 MOVW dst+8(FP), R2 269 MOVW $SYS_mincore, R7 270 SWI $0 271 MOVW R0, ret+12(FP) 272 RET 273 274 TEXT runtime·walltime(SB),NOSPLIT,$8-12 275 // We don't know how much stack space the VDSO code will need, 276 // so switch to g0. 277 278 // Save old SP. Use R13 instead of SP to avoid linker rewriting the offsets. 279 MOVW R13, R4 // R4 is unchanged by C code. 280 281 MOVW g_m(g), R5 // R5 is unchanged by C code. 282 283 // Set vdsoPC and vdsoSP for SIGPROF traceback. 284 // Save the old values on stack and restore them on exit, 285 // so this function is reentrant. 286 MOVW m_vdsoPC(R5), R1 287 MOVW m_vdsoSP(R5), R2 288 MOVW R1, 4(R13) 289 MOVW R2, 8(R13) 290 291 MOVW $ret-4(FP), R2 // caller's SP 292 MOVW LR, m_vdsoPC(R5) 293 MOVW R2, m_vdsoSP(R5) 294 295 MOVW m_curg(R5), R0 296 297 CMP g, R0 // Only switch if on curg. 298 B.NE noswitch 299 300 MOVW m_g0(R5), R0 301 MOVW (g_sched+gobuf_sp)(R0), R13 // Set SP to g0 stack 302 303 noswitch: 304 SUB $24, R13 // Space for results 305 BIC $0x7, R13 // Align for C code 306 307 MOVW $CLOCK_REALTIME, R0 308 MOVW $8(R13), R1 // timespec 309 MOVW runtime·vdsoClockgettimeSym(SB), R2 310 CMP $0, R2 311 B.EQ fallback 312 313 // Store g on gsignal's stack, so if we receive a signal 314 // during VDSO code we can find the g. 315 // If we don't have a signal stack, we won't receive signal, 316 // so don't bother saving g. 317 // When using cgo, we already saved g on TLS, also don't save 318 // g here. 319 // Also don't save g if we are already on the signal stack. 320 // We won't get a nested signal. 321 MOVB runtime·iscgo(SB), R6 322 CMP $0, R6 323 BNE nosaveg 324 MOVW m_gsignal(R5), R6 // g.m.gsignal 325 CMP $0, R6 326 BEQ nosaveg 327 CMP g, R6 328 BEQ nosaveg 329 MOVW (g_stack+stack_lo)(R6), R6 // g.m.gsignal.stack.lo 330 MOVW g, (R6) 331 332 BL (R2) 333 334 MOVW $0, R1 335 MOVW R1, (R6) // clear g slot, R6 is unchanged by C code 336 337 JMP finish 338 339 nosaveg: 340 BL (R2) 341 JMP finish 342 343 fallback: 344 MOVW $SYS_clock_gettime, R7 345 SWI $0 346 347 finish: 348 MOVW 8(R13), R0 // sec 349 MOVW 12(R13), R2 // nsec 350 351 MOVW R4, R13 // Restore real SP 352 // Restore vdsoPC, vdsoSP 353 // We don't worry about being signaled between the two stores. 354 // If we are not in a signal handler, we'll restore vdsoSP to 0, 355 // and no one will care about vdsoPC. If we are in a signal handler, 356 // we cannot receive another signal. 357 MOVW 8(R13), R1 358 MOVW R1, m_vdsoSP(R5) 359 MOVW 4(R13), R1 360 MOVW R1, m_vdsoPC(R5) 361 362 MOVW R0, sec_lo+0(FP) 363 MOVW $0, R1 364 MOVW R1, sec_hi+4(FP) 365 MOVW R2, nsec+8(FP) 366 RET 367 368 // int64 nanotime1(void) 369 TEXT runtime·nanotime1(SB),NOSPLIT,$8-8 370 // Switch to g0 stack. See comment above in runtime·walltime. 371 372 // Save old SP. Use R13 instead of SP to avoid linker rewriting the offsets. 373 MOVW R13, R4 // R4 is unchanged by C code. 374 375 MOVW g_m(g), R5 // R5 is unchanged by C code. 376 377 // Set vdsoPC and vdsoSP for SIGPROF traceback. 378 // Save the old values on stack and restore them on exit, 379 // so this function is reentrant. 380 MOVW m_vdsoPC(R5), R1 381 MOVW m_vdsoSP(R5), R2 382 MOVW R1, 4(R13) 383 MOVW R2, 8(R13) 384 385 MOVW $ret-4(FP), R2 // caller's SP 386 MOVW LR, m_vdsoPC(R5) 387 MOVW R2, m_vdsoSP(R5) 388 389 MOVW m_curg(R5), R0 390 391 CMP g, R0 // Only switch if on curg. 392 B.NE noswitch 393 394 MOVW m_g0(R5), R0 395 MOVW (g_sched+gobuf_sp)(R0), R13 // Set SP to g0 stack 396 397 noswitch: 398 SUB $24, R13 // Space for results 399 BIC $0x7, R13 // Align for C code 400 401 MOVW $CLOCK_MONOTONIC, R0 402 MOVW $8(R13), R1 // timespec 403 MOVW runtime·vdsoClockgettimeSym(SB), R2 404 CMP $0, R2 405 B.EQ fallback 406 407 // Store g on gsignal's stack, so if we receive a signal 408 // during VDSO code we can find the g. 409 // If we don't have a signal stack, we won't receive signal, 410 // so don't bother saving g. 411 // When using cgo, we already saved g on TLS, also don't save 412 // g here. 413 // Also don't save g if we are already on the signal stack. 414 // We won't get a nested signal. 415 MOVB runtime·iscgo(SB), R6 416 CMP $0, R6 417 BNE nosaveg 418 MOVW m_gsignal(R5), R6 // g.m.gsignal 419 CMP $0, R6 420 BEQ nosaveg 421 CMP g, R6 422 BEQ nosaveg 423 MOVW (g_stack+stack_lo)(R6), R6 // g.m.gsignal.stack.lo 424 MOVW g, (R6) 425 426 BL (R2) 427 428 MOVW $0, R1 429 MOVW R1, (R6) // clear g slot, R6 is unchanged by C code 430 431 JMP finish 432 433 nosaveg: 434 BL (R2) 435 JMP finish 436 437 fallback: 438 MOVW $SYS_clock_gettime, R7 439 SWI $0 440 441 finish: 442 MOVW 8(R13), R0 // sec 443 MOVW 12(R13), R2 // nsec 444 445 MOVW R4, R13 // Restore real SP 446 // Restore vdsoPC, vdsoSP 447 // We don't worry about being signaled between the two stores. 448 // If we are not in a signal handler, we'll restore vdsoSP to 0, 449 // and no one will care about vdsoPC. If we are in a signal handler, 450 // we cannot receive another signal. 451 MOVW 8(R13), R4 452 MOVW R4, m_vdsoSP(R5) 453 MOVW 4(R13), R4 454 MOVW R4, m_vdsoPC(R5) 455 456 MOVW $1000000000, R3 457 MULLU R0, R3, (R1, R0) 458 ADD.S R2, R0 459 ADC $0, R1 // Add carry bit to upper half. 460 461 MOVW R0, ret_lo+0(FP) 462 MOVW R1, ret_hi+4(FP) 463 RET 464 465 // int32 futex(int32 *uaddr, int32 op, int32 val, 466 // struct timespec *timeout, int32 *uaddr2, int32 val2); 467 TEXT runtime·futex(SB),NOSPLIT,$0 468 MOVW addr+0(FP), R0 469 MOVW op+4(FP), R1 470 MOVW val+8(FP), R2 471 MOVW ts+12(FP), R3 472 MOVW addr2+16(FP), R4 473 MOVW val3+20(FP), R5 474 MOVW $SYS_futex, R7 475 SWI $0 476 MOVW R0, ret+24(FP) 477 RET 478 479 // int32 clone(int32 flags, void *stack, M *mp, G *gp, void (*fn)(void)); 480 TEXT runtime·clone(SB),NOSPLIT,$0 481 MOVW flags+0(FP), R0 482 MOVW stk+4(FP), R1 483 MOVW $0, R2 // parent tid ptr 484 MOVW $0, R3 // tls_val 485 MOVW $0, R4 // child tid ptr 486 MOVW $0, R5 487 488 // Copy mp, gp, fn off parent stack for use by child. 489 MOVW $-16(R1), R1 490 MOVW mp+8(FP), R6 491 MOVW R6, 0(R1) 492 MOVW gp+12(FP), R6 493 MOVW R6, 4(R1) 494 MOVW fn+16(FP), R6 495 MOVW R6, 8(R1) 496 MOVW $1234, R6 497 MOVW R6, 12(R1) 498 499 MOVW $SYS_clone, R7 500 SWI $0 501 502 // In parent, return. 503 CMP $0, R0 504 BEQ 3(PC) 505 MOVW R0, ret+20(FP) 506 RET 507 508 // Paranoia: check that SP is as we expect. Use R13 to avoid linker 'fixup' 509 NOP R13 // tell vet SP/R13 changed - stop checking offsets 510 MOVW 12(R13), R0 511 MOVW $1234, R1 512 CMP R0, R1 513 BEQ 2(PC) 514 BL runtime·abort(SB) 515 516 MOVW 0(R13), R8 // m 517 MOVW 4(R13), R0 // g 518 519 CMP $0, R8 520 BEQ nog 521 CMP $0, R0 522 BEQ nog 523 524 MOVW R0, g 525 MOVW R8, g_m(g) 526 527 // paranoia; check they are not nil 528 MOVW 0(R8), R0 529 MOVW 0(g), R0 530 531 BL runtime·emptyfunc(SB) // fault if stack check is wrong 532 533 // Initialize m->procid to Linux tid 534 MOVW $SYS_gettid, R7 535 SWI $0 536 MOVW g_m(g), R8 537 MOVW R0, m_procid(R8) 538 539 nog: 540 // Call fn 541 MOVW 8(R13), R0 542 MOVW $16(R13), R13 543 BL (R0) 544 545 // It shouldn't return. If it does, exit that thread. 546 SUB $16, R13 // restore the stack pointer to avoid memory corruption 547 MOVW $0, R0 548 MOVW R0, 4(R13) 549 BL exit1<>(SB) 550 551 MOVW $1234, R0 552 MOVW $1005, R1 553 MOVW R0, (R1) 554 555 TEXT runtime·sigaltstack(SB),NOSPLIT,$0 556 MOVW new+0(FP), R0 557 MOVW old+4(FP), R1 558 MOVW $SYS_sigaltstack, R7 559 SWI $0 560 MOVW $0xfffff001, R6 561 CMP R6, R0 562 MOVW.HI $0, R8 // crash on syscall failure 563 MOVW.HI R8, (R8) 564 RET 565 566 TEXT runtime·sigfwd(SB),NOSPLIT,$0-16 567 MOVW sig+4(FP), R0 568 MOVW info+8(FP), R1 569 MOVW ctx+12(FP), R2 570 MOVW fn+0(FP), R11 571 MOVW R13, R4 572 SUB $24, R13 573 BIC $0x7, R13 // alignment for ELF ABI 574 BL (R11) 575 MOVW R4, R13 576 RET 577 578 TEXT runtime·sigtramp(SB),NOSPLIT,$0 579 // Reserve space for callee-save registers and arguments. 580 MOVM.DB.W [R4-R11], (R13) 581 SUB $16, R13 582 583 // this might be called in external code context, 584 // where g is not set. 585 // first save R0, because runtime·load_g will clobber it 586 MOVW R0, 4(R13) 587 MOVB runtime·iscgo(SB), R0 588 CMP $0, R0 589 BL.NE runtime·load_g(SB) 590 591 MOVW R1, 8(R13) 592 MOVW R2, 12(R13) 593 MOVW $runtime·sigtrampgo(SB), R11 594 BL (R11) 595 596 // Restore callee-save registers. 597 ADD $16, R13 598 MOVM.IA.W (R13), [R4-R11] 599 600 RET 601 602 TEXT runtime·cgoSigtramp(SB),NOSPLIT,$0 603 MOVW $runtime·sigtramp(SB), R11 604 B (R11) 605 606 TEXT runtime·rtsigprocmask(SB),NOSPLIT,$0 607 MOVW how+0(FP), R0 608 MOVW new+4(FP), R1 609 MOVW old+8(FP), R2 610 MOVW size+12(FP), R3 611 MOVW $SYS_rt_sigprocmask, R7 612 SWI $0 613 RET 614 615 TEXT runtime·rt_sigaction(SB),NOSPLIT,$0 616 MOVW sig+0(FP), R0 617 MOVW new+4(FP), R1 618 MOVW old+8(FP), R2 619 MOVW size+12(FP), R3 620 MOVW $SYS_rt_sigaction, R7 621 SWI $0 622 MOVW R0, ret+16(FP) 623 RET 624 625 TEXT runtime·usleep(SB),NOSPLIT,$12 626 MOVW usec+0(FP), R0 627 CALL runtime·usplitR0(SB) 628 MOVW R0, 4(R13) 629 MOVW $1000, R0 // usec to nsec 630 MUL R0, R1 631 MOVW R1, 8(R13) 632 MOVW $4(R13), R0 633 MOVW $0, R1 634 MOVW $SYS_nanosleep, R7 635 SWI $0 636 RET 637 638 // As for cas, memory barriers are complicated on ARM, but the kernel 639 // provides a user helper. ARMv5 does not support SMP and has no 640 // memory barrier instruction at all. ARMv6 added SMP support and has 641 // a memory barrier, but it requires writing to a coprocessor 642 // register. ARMv7 introduced the DMB instruction, but it's expensive 643 // even on single-core devices. The kernel helper takes care of all of 644 // this for us. 645 646 TEXT kernelPublicationBarrier<>(SB),NOSPLIT,$0 647 // void __kuser_memory_barrier(void); 648 MOVW $0xffff0fa0, R11 649 CALL (R11) 650 RET 651 652 TEXT ·publicationBarrier(SB),NOSPLIT,$0 653 MOVB ·goarm(SB), R11 654 CMP $7, R11 655 BLT 2(PC) 656 JMP ·armPublicationBarrier(SB) 657 JMP kernelPublicationBarrier<>(SB) // extra layer so this function is leaf and no SP adjustment on GOARM=7 658 659 TEXT runtime·osyield(SB),NOSPLIT,$0 660 MOVW $SYS_sched_yield, R7 661 SWI $0 662 RET 663 664 TEXT runtime·sched_getaffinity(SB),NOSPLIT,$0 665 MOVW pid+0(FP), R0 666 MOVW len+4(FP), R1 667 MOVW buf+8(FP), R2 668 MOVW $SYS_sched_getaffinity, R7 669 SWI $0 670 MOVW R0, ret+12(FP) 671 RET 672 673 // int32 runtime·epollcreate(int32 size) 674 TEXT runtime·epollcreate(SB),NOSPLIT,$0 675 MOVW size+0(FP), R0 676 MOVW $SYS_epoll_create, R7 677 SWI $0 678 MOVW R0, ret+4(FP) 679 RET 680 681 // int32 runtime·epollcreate1(int32 flags) 682 TEXT runtime·epollcreate1(SB),NOSPLIT,$0 683 MOVW flags+0(FP), R0 684 MOVW $SYS_epoll_create1, R7 685 SWI $0 686 MOVW R0, ret+4(FP) 687 RET 688 689 // func epollctl(epfd, op, fd int32, ev *epollEvent) int 690 TEXT runtime·epollctl(SB),NOSPLIT,$0 691 MOVW epfd+0(FP), R0 692 MOVW op+4(FP), R1 693 MOVW fd+8(FP), R2 694 MOVW ev+12(FP), R3 695 MOVW $SYS_epoll_ctl, R7 696 SWI $0 697 MOVW R0, ret+16(FP) 698 RET 699 700 // int32 runtime·epollwait(int32 epfd, EpollEvent *ev, int32 nev, int32 timeout) 701 TEXT runtime·epollwait(SB),NOSPLIT,$0 702 MOVW epfd+0(FP), R0 703 MOVW ev+4(FP), R1 704 MOVW nev+8(FP), R2 705 MOVW timeout+12(FP), R3 706 MOVW $SYS_epoll_wait, R7 707 SWI $0 708 MOVW R0, ret+16(FP) 709 RET 710 711 // void runtime·closeonexec(int32 fd) 712 TEXT runtime·closeonexec(SB),NOSPLIT,$0 713 MOVW fd+0(FP), R0 // fd 714 MOVW $2, R1 // F_SETFD 715 MOVW $1, R2 // FD_CLOEXEC 716 MOVW $SYS_fcntl, R7 717 SWI $0 718 RET 719 720 // func runtime·setNonblock(fd int32) 721 TEXT runtime·setNonblock(SB),NOSPLIT,$0-4 722 MOVW fd+0(FP), R0 // fd 723 MOVW $3, R1 // F_GETFL 724 MOVW $0, R2 725 MOVW $SYS_fcntl, R7 726 SWI $0 727 ORR $0x800, R0, R2 // O_NONBLOCK 728 MOVW fd+0(FP), R0 // fd 729 MOVW $4, R1 // F_SETFL 730 MOVW $SYS_fcntl, R7 731 SWI $0 732 RET 733 734 // b __kuser_get_tls @ 0xffff0fe0 735 TEXT runtime·read_tls_fallback(SB),NOSPLIT|NOFRAME,$0 736 MOVW $0xffff0fe0, R0 737 B (R0) 738 739 TEXT runtime·access(SB),NOSPLIT,$0 740 MOVW name+0(FP), R0 741 MOVW mode+4(FP), R1 742 MOVW $SYS_access, R7 743 SWI $0 744 MOVW R0, ret+8(FP) 745 RET 746 747 TEXT runtime·connect(SB),NOSPLIT,$0 748 MOVW fd+0(FP), R0 749 MOVW addr+4(FP), R1 750 MOVW len+8(FP), R2 751 MOVW $SYS_connect, R7 752 SWI $0 753 MOVW R0, ret+12(FP) 754 RET 755 756 TEXT runtime·socket(SB),NOSPLIT,$0 757 MOVW domain+0(FP), R0 758 MOVW typ+4(FP), R1 759 MOVW prot+8(FP), R2 760 MOVW $SYS_socket, R7 761 SWI $0 762 MOVW R0, ret+12(FP) 763 RET 764 765 // func sbrk0() uintptr 766 TEXT runtime·sbrk0(SB),NOSPLIT,$0-4 767 // Implemented as brk(NULL). 768 MOVW $0, R0 769 MOVW $SYS_brk, R7 770 SWI $0 771 MOVW R0, ret+0(FP) 772 RET 773 774 TEXT runtime·sigreturn(SB),NOSPLIT,$0-0 775 RET